initial import of NetBSD tree

49 files changed, 8313 insertions, 0 deletions

diff --git a/src/lib/libc/net/Makefile.inc b/src/lib/libc/net/Makefile.inc
new file mode 100644
index 0000000000..2d220067e4
--- /dev/null
+++ b/src/lib/libc/net/Makefile.inc
@@ -0,0 +1,46 @@
+#       $NetBSD: Makefile.inc,v 1.23 1995/03/02 09:09:07 chopps Exp $
+#       @(#)Makefile.inc        8.2 (Berkeley) 9/5/93
+
+# net sources
+.PATH: ${.CURDIR}/arch/${MACHINE_ARCH}/net ${.CURDIR}/net
+
+SRCS+=  gethostnamadr.c getnetbyaddr.c getnetbyname.c getnetent.c \
+        getproto.c getprotoent.c getprotoname.c getservbyname.c \
+        getservbyport.c getservent.c herror.c inet_addr.c inet_lnaof.c \
+        inet_makeaddr.c inet_netof.c inet_network.c inet_ntoa.c \
+        iso_addr.c linkaddr.c ns_addr.c ns_ntoa.c rcmd.c recv.c res_comp.c \
+        res_debug.c res_init.c res_mkquery.c res_query.c res_send.c \
+        send.c sethostent.c ethers.c
+
+# machine-dependent net sources
+# m-d Makefile.inc must include sources for:
+#       htonl() htons() ntohl() ntohs()
+
+.include "${.CURDIR}/arch/${MACHINE_ARCH}/net/Makefile.inc"
+
+MAN+=   byteorder.3 gethostbyname.3 getnetent.3 getprotoent.3 getservent.3 \
+        inet.3 linkaddr.3 ns.3 rcmd.3 resolver.3 ethers.3
+
+MLINKS+=byteorder.3 htonl.3 byteorder.3 htons.3 byteorder.3 ntohl.3 \
+        byteorder.3 ntohs.3
+MLINKS+=ethers.3 ether_aton.3 ethers.3 ether_hostton.3 ethers.3 ether_line.3 \
+        ethers.3 ether_ntoa.3 ethers.3 ether_ntohost.3
+MLINKS+=gethostbyname.3 endhostent.3 gethostbyname.3 gethostbyaddr.3 \
+        gethostbyname.3 sethostent.3 gethostbyname.3 gethostent.3 \
+        gethostbyname.3 herror.3
+MLINKS+=getnetent.3 endnetent.3 getnetent.3 getnetbyaddr.3 \
+        getnetent.3 getnetbyname.3 getnetent.3 setnetent.3
+MLINKS+=getprotoent.3 endprotoent.3 getprotoent.3 getprotobyname.3 \
+        getprotoent.3 getprotobynumber.3 getprotoent.3 setprotoent.3
+MLINKS+=getservent.3 endservent.3 getservent.3 getservbyname.3 \
+        getservent.3 getservbyport.3 getservent.3 setservent.3
+MLINKS+=inet.3 addr.3 inet.3 inet_addr.3 inet.3 inet_aton.3 \
+        inet.3 inet_lnaof.3 inet.3 inet_makeaddr.3 inet.3 inet_netof.3 \
+        inet.3 inet_network.3 inet.3 inet_ntoa.3 inet.3 network.3 \
+        inet.3 ntoa.3
+MLINKS+=linkaddr.3 linkntoa.3
+MLINKS+=ns.3 ns_addr.3 ns.3 ns_ntoa.3
+MLINKS+=rcmd.3 iruserok.3 rcmd.3 rresvport.3 rcmd.3 ruserok.3
+MLINKS+=resolver.3 dn_comp.3 resolver.3 dn_expand.3 resolver.3 res_init.3 \
+        resolver.3 res_mkquery.3 resolver.3 res_send.3 resolver.3 res_query.3 \
+        resolver.3 res_search.3
diff --git a/src/lib/libc/net/byteorder.3 b/src/lib/libc/net/byteorder.3
new file mode 100644
index 0000000000..701a69f688
--- /dev/null
+++ b/src/lib/libc/net/byteorder.3
@@ -0,0 +1,78 @@
+.\"     $NetBSD: byteorder.3,v 1.3 1995/02/25 06:20:27 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)byteorder.3 8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt BYTEORDER 3
+.Os BSD 4.2
+.Sh NAME
+.Nm htonl ,
+.Nm htons ,
+.Nm ntohl ,
+.Nm ntohs
+.Nd convert values between host and network byte order
+.Sh SYNOPSIS
+.Fd #include <sys/param.h>
+.Ft u_long
+.Fn htonl "u_long hostlong"
+.Ft u_short
+.Fn htons "u_short hostshort"
+.Ft u_long
+.Fn ntohl "u_long netlong"
+.Ft u_short
+.Fn ntohs "u_short netshort"
+.Sh DESCRIPTION
+These routines convert 16 and 32 bit quantities between network
+byte order and host byte order.
+On machines which have a byte order which is the same as the network
+order, routines are defined as null macros.
+.Pp
+These routines are most often used in conjunction with Internet
+addresses and ports as returned by
+.Xr gethostbyname 3
+and
+.Xr getservent 3 .
+.Sh SEE ALSO
+.Xr gethostbyname 3 ,
+.Xr getservent 3
+.Sh HISTORY
+The
+.Nm byteorder
+functions appeared in 
+.Bx 4.2 .
+.Sh BUGS
+On the
+.Tn VAX
+bytes are handled backwards from most everyone else in
+the world.  This is not expected to be fixed in the near future.
diff --git a/src/lib/libc/net/ethers.3 b/src/lib/libc/net/ethers.3
new file mode 100644
index 0000000000..81e6c65935
--- /dev/null
+++ b/src/lib/libc/net/ethers.3
@@ -0,0 +1,102 @@
+.\"
+.\" Written by roland@frob.com.  Public domain.
+.\"
+.Dd December 16, 1993
+.Dt ETHERS 3
+.Os NetBSD
+.Sh NAME
+.Nm ether_ntoa ,
+.Nm ether_addr ,
+.Nm ether_ntohost ,
+.Nm ether_hostton ,
+.Nm ether_line ,
+.Nd get ethers entry
+.Sh SYNOPSIS
+.Fd #include <netinet/if_ether.h>
+.Ft char *
+.Fn ether_ntoa "struct ether_addr *e"
+.Ft struct ether_addr *
+.Fn ether_aton "char *s"
+.Fn ether_ntohost "char *hostname" "struct ether_addr *e"
+.Fn ether_hostton "char *hostname" "struct ether_addr *e"
+.Fn ether_line "char *l" "struct ether_addr *e" "char *hostname"
+.Sh DESCRIPTION
+Ethernet addresses are represented by the 
+following structure:
+.Bd -literal -offset indent
+struct ether_addr {
+        u_char  ether_addr_octet[6];
+};
+.Ed
+.Pp
+The
+.Fn ether_ntoa
+function converts this structure into an ASCII string of the form
+``xx:xx:xx:xx:xx:xx'', consisting of 6 hexadecimal numbers separated
+by colons.  It returns a pointer to a static buffer that is reused for
+each call.
+The
+.Fn ether_aton
+converts an ASCII string of the same form and to a structure
+containing the 6 octets of the address.  It returns a pointer to a
+static structure that is reused for each call.
+.Pp
+The
+.Fn ether_ntohost
+and
+.Fn ether_hostton
+functions interrogate the data base mapping host names to Ethernet
+addresses,
+.Pa /etc/ethers .
+The
+.Fn ether_ntohost
+function looks up the given Ethernet address and writes the associated
+host name into the character buffer passed.
+The
+.Fn ether_hostton
+function looks up the given host name and writes the associated
+Ethernet address into the structure passed.  Both functions return
+zero if they find the requested host name or address, and -1 if not.
+Each call reads
+.Pa /etc/ethers 
+from the beginning; if a + appears alone on a line in the file, then
+.Fn ether_hostton
+will consult the
+.Pa ethers.byname
+YP map, and
+.Fn ether_ntohost
+will consult the
+.Pa ethers.byaddr
+YP map.
+.Pp
+The
+.Fn ether_line
+function parses a line from the
+.Pa /etc/ethers
+file and fills in the passed ``struct ether_addr'' and character
+buffer with the Ethernet address and host name on the line.  It
+returns zero if the line was successfully parsed and -1 if not.
+.Sh FILES
+.Bl -tag -width /etc/ethers -compact
+.It Pa /etc/ethers
+.El
+.Sh SEE ALSO
+.Xr ethers 5
+.Sh HISTORY
+The
+.Fn ether_ntoa ,
+.Fn ether_aton ,
+.Fn ether_ntohost ,
+.Fn ether_hostton ,
+and
+.Fn ether_line
+functions were adopted from SunOS and appeared in
+NetBSD 0.9b.
+.Sh BUGS
+The data space used by these functions is static; if future use
+requires the data, it should be copied before any subsequent calls to
+these functions overwrite it.  There is no way to restrict how many
+character will be written into the host name buffer passed.  A very
+long line in
+.Pa /etc/ethers
+could overflow your buffer.
diff --git a/src/lib/libc/net/ethers.c b/src/lib/libc/net/ethers.c
new file mode 100644
index 0000000000..0f32b9b71b
--- /dev/null
+++ b/src/lib/libc/net/ethers.c
@@ -0,0 +1,178 @@
+/*      $NetBSD: ethers.c,v 1.5 1995/02/25 06:20:28 cgd Exp $   */
+
+/* 
+ * ethers(3N) a la Sun.
+ *
+ * Written by Roland McGrath <roland@frob.com> 10/14/93.
+ * Public domain.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <netinet/if_ether.h>
+#include <sys/param.h>
+#include <paths.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef _PATH_ETHERS
+#define _PATH_ETHERS "/etc/ethers"
+#endif
+
+char *
+ether_ntoa(e)
+        struct ether_addr *e;
+{
+        static char a[] = "xx:xx:xx:xx:xx:xx";
+
+        sprintf(a, "%02x:%02x:%02x:%02x:%02x:%02x",
+            e->ether_addr_octet[0], e->ether_addr_octet[1],
+            e->ether_addr_octet[2], e->ether_addr_octet[3],
+            e->ether_addr_octet[4], e->ether_addr_octet[5]);
+        return a;
+}
+
+struct ether_addr *
+ether_aton(s)
+        char *s;
+{
+        static struct ether_addr n;
+        u_int i[6];
+
+        if (sscanf(s, " %x:%x:%x:%x:%x:%x ", &i[0], &i[1],
+            &i[2], &i[3], &i[4], &i[5]) == 6) {
+                n.ether_addr_octet[0] = (u_char)i[0];
+                n.ether_addr_octet[1] = (u_char)i[1];
+                n.ether_addr_octet[2] = (u_char)i[2];
+                n.ether_addr_octet[3] = (u_char)i[3];
+                n.ether_addr_octet[4] = (u_char)i[4];
+                n.ether_addr_octet[5] = (u_char)i[5];
+                return &n;
+        }
+        return NULL;
+}
+
+ether_ntohost(hostname, e)
+        char *hostname;
+        struct ether_addr *e;
+{
+        FILE *f; 
+        char buf[BUFSIZ];
+        struct ether_addr try;
+
+#ifdef YP
+        char trybuf[sizeof "xx:xx:xx:xx:xx:xx"];
+        int trylen;
+
+        sprintf(trybuf, "%x:%x:%x:%x:%x:%x", 
+            e->ether_addr_octet[0], e->ether_addr_octet[1],
+            e->ether_addr_octet[2], e->ether_addr_octet[3],
+            e->ether_addr_octet[4], e->ether_addr_octet[5]);
+        trylen = strlen(trybuf);
+#endif
+
+        f = fopen(_PATH_ETHERS, "r");
+        if (f==NULL)
+                return -1;
+        while (fgets(buf, sizeof buf, f)) {
+#ifdef YP
+                /* A + in the file means try YP now.  */
+                if (!strncmp(buf, "+\n", sizeof buf)) {
+                        char *ypbuf, *ypdom;
+                        int ypbuflen;
+
+                        if (yp_get_default_domain(&ypdom))
+                                continue;
+                        if (yp_match(ypdom, "ethers.byaddr", trybuf,
+                            trylen, &ypbuf, &ypbuflen))
+                                continue;
+                        if (ether_line(ypbuf, &try, hostname) == 0) {
+                                free(ypbuf);
+                                (void)fclose(f);
+                                return 0;
+                        }
+                        free(ypbuf);
+                        continue;
+                }
+#endif
+                if (ether_line(buf, &try, hostname) == 0 &&
+                    bcmp((char *)&try, (char *)e, sizeof try) == 0) {
+                        (void)fclose(f);
+                        return 0;
+                }     
+        }
+        (void)fclose(f);
+        errno = ENOENT;
+        return -1;
+}
+
+ether_hostton(hostname, e)
+        char *hostname;
+        struct ether_addr *e;
+{
+        FILE *f;
+        char buf[BUFSIZ];
+        char try[MAXHOSTNAMELEN];
+#ifdef YP
+        int hostlen = strlen(hostname);
+#endif
+
+        f = fopen(_PATH_ETHERS, "r");
+        if (f==NULL)
+                return -1;
+
+        while (fgets(buf, sizeof buf, f)) {
+#ifdef YP
+                /* A + in the file means try YP now.  */
+                if (!strncmp(buf, "+\n", sizeof buf)) {
+                        char *ypbuf, *ypdom;
+                        int ypbuflen;
+
+                        if (yp_get_default_domain(&ypdom))
+                                continue;
+                        if (yp_match(ypdom, "ethers.byname", hostname, hostlen,
+                            &ypbuf, &ypbuflen))
+                                continue;
+                        if (ether_line(ypbuf, e, try) == 0) {
+                                free(ypbuf);
+                                (void)fclose(f);
+                                return 0;
+                        }
+                        free(ypbuf);
+                        continue;
+                }
+#endif
+                if (ether_line(buf, e, try) == 0 && strcmp(hostname, try) == 0) {
+                        (void)fclose(f);
+                        return 0;
+                }
+        }
+        (void)fclose(f);
+        errno = ENOENT;
+        return -1;
+}
+
+ether_line(l, e, hostname)
+        char *l;
+        struct ether_addr *e;
+        char *hostname;
+{
+        u_int i[6];
+
+        if (sscanf(l, " %x:%x:%x:%x:%x:%x %s\n", &i[0], &i[1],
+            &i[2], &i[3], &i[4], &i[5], hostname) == 7) {
+                e->ether_addr_octet[0] = (u_char)i[0];
+                e->ether_addr_octet[1] = (u_char)i[1];
+                e->ether_addr_octet[2] = (u_char)i[2];
+                e->ether_addr_octet[3] = (u_char)i[3];
+                e->ether_addr_octet[4] = (u_char)i[4];
+                e->ether_addr_octet[5] = (u_char)i[5];
+                return 0;
+        }
+        errno = EINVAL;
+        return -1;
+}
diff --git a/src/lib/libc/net/gethostbyname.3 b/src/lib/libc/net/gethostbyname.3
new file mode 100644
index 0000000000..bac0368296
--- /dev/null
+++ b/src/lib/libc/net/gethostbyname.3
@@ -0,0 +1,254 @@
+.\"     $NetBSD: gethostbyname.3,v 1.6 1995/02/25 06:20:28 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1987, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)gethostbyname.3     8.2 (Berkeley) 4/19/94
+.\"
+.Dd April 19, 1994
+.Dt GETHOSTBYNAME 3
+.Os BSD 4.2
+.Sh NAME
+.Nm gethostbyname ,
+.Nm gethostbyaddr ,
+.Nm gethostent ,
+.Nm sethostent ,
+.Nm endhostent ,
+.Nm herror
+.Nd get network host entry
+.Sh SYNOPSIS
+.Fd #include <netdb.h>
+.Fd extern int h_errno;
+.Ft struct hostent *
+.Fn gethostbyname "const char *name"
+.Ft struct hostent *
+.Fn gethostbyaddr "const char *addr" "int len" "int type"
+.Ft struct hostent *
+.Fn gethostent void
+.Fn sethostent "int stayopen"
+.Fn endhostent void
+.Fn herror "char *string"
+.Sh DESCRIPTION
+The
+.Fn gethostbyname
+and
+.Fn gethostbyaddr
+functions
+each return a pointer to an object with the
+following structure describing an internet host
+referenced by name or by address, respectively.
+This structure contains either the information obtained from the name server,
+.Xr named 8 ,
+broken-out fields from a line in 
+.Pa /etc/hosts ,
+or database entries supplied by the
+.Xr yp 8
+system .
+If the local name server is not running these routines do a lookup in
+.Pa /etc/hosts .
+.Bd -literal
+struct  hostent {
+        char    *h_name;        /* official name of host */
+        char    **h_aliases;    /* alias list */
+        int     h_addrtype;     /* host address type */
+        int     h_length;       /* length of address */
+        char    **h_addr_list;  /* list of addresses from name server */
+};
+#define h_addr  h_addr_list[0]  /* address, for backward compatibility */
+.Ed
+.Pp
+The members of this structure are:
+.Bl -tag -width h_addr_list
+.It Fa h_name
+Official name of the host.
+.It Fa h_aliases
+A zero terminated array of alternate names for the host.
+.It Fa h_addrtype
+The type of address being returned; currently always
+.Dv AF_INET .
+.It Fa h_length
+The length, in bytes, of the address.
+.It Fa h_addr_list
+A zero terminated array of network addresses for the host.
+Host addresses are returned in network byte order.
+.It Fa h_addr
+The first address in
+.Fa h_addr_list ;
+this is for backward compatibility.
+.Pp
+When using the nameserver,
+.Fn gethostbyname
+will search for the named host in the current domain and its parents
+unless the name ends in a dot.
+If the name contains no dot, and if the environment variable
+.Dq Ev HOSTALIASES
+contains the name of an alias file, the alias file will first be searched
+for an alias matching the input name.
+See
+.Xr hostname 7
+for the domain search procedure and the alias file format.
+.Pp
+The
+.Fn sethostent
+function
+may be used to request the use of a connected
+.Tn TCP
+socket for queries.
+If the
+.Fa stayopen
+flag is non-zero,
+this sets the option to send all queries to the name server using
+.Tn TCP
+and to retain the connection after each call to 
+.Fn gethostbyname
+or
+.Fn gethostbyaddr .
+Otherwise, queries are performed using
+.Tn UDP
+datagrams.
+.Pp
+The
+.Fn endhostent
+function
+closes the
+.Tn TCP
+connection.
+.Sh FILES
+.Bl -tag -width /etc/hosts -compact
+.It Pa /etc/hosts
+.El
+.Sh DIAGNOSTICS
+Error return status from 
+.Fn gethostbyname
+and
+.Fn gethostbyaddr
+is indicated by return of a null pointer.
+The external integer
+.Va h_errno
+may then be checked to see whether this is a temporary failure
+or an invalid or unknown host.
+The routine
+.Fn herror
+can be used to print an error message describing the failure.
+If its argument
+.Fa string
+is
+.Pf non Dv -NULL ,
+it is printed, followed by a colon and a space.
+The error message is printed with a trailing newline.
+.Pp
+The variable
+.Va h_errno
+can have the following values:
+.Bl -tag -width HOST_NOT_FOUND
+.It Dv HOST_NOT_FOUND
+No such host is known.
+.It Dv TRY_AGAIN
+This is usually a temporary error
+and means that the local server did not receive
+a response from an authoritative server.
+A retry at some later time may succeed.
+.It Dv NO_RECOVERY
+Some unexpected server failure was encountered.
+This is a non-recoverable error.
+.It Dv NO_DATA
+The requested name is valid but does not have an IP address; 
+this is not a temporary error.  
+This means that the name is known to the name server but there is no address
+associated with this name.
+Another type of request to the name server using this domain name
+will result in an answer;
+for example, a mail-forwarder may be registered for this domain.
+.El
+.Sh SEE ALSO
+.Xr resolver 3 ,
+.Xr hosts 5 ,
+.Xr hostname 7 ,
+.Xr named 8
+.Sh CAVEAT
+The
+.Fn gethostent
+function
+is defined, and
+.Fn sethostent
+and
+.Fn endhostent
+are redefined,
+when
+.Xr libc 3
+is built to use only the routines to lookup in
+.Pa /etc/hosts
+and not the name server.
+.Pp
+The
+.Fn gethostent
+function
+reads the next line of
+.Pa /etc/hosts ,
+opening the file if necessary.
+.Pp
+The
+.Fn sethostent
+function
+opens and/or rewinds the file
+.Pa /etc/hosts .
+If the
+.Fa stayopen
+argument is non-zero,
+the file will not be closed after each call to
+.Fn gethostbyname
+or
+.Fn gethostbyaddr .
+.Pp
+The
+.Fn endhostent
+function
+closes the file.
+.Sh HISTORY
+The
+.Fn herror
+function appeared in 
+.Bx 4.3 .
+The
+.Fn endhostent ,
+.Fn gethostbyaddr ,
+.Fn gethostbyname ,
+.Fn gethostent ,
+and
+.Fn sethostent
+functions appeared in
+.Bx 4.2 .
+.Sh BUGS
+These functions use static data storage;
+if the data is needed for future use, it should be
+copied before any subsequent calls overwrite it.
+Only the Internet
+address format is currently understood.
diff --git a/src/lib/libc/net/gethostnamadr.c b/src/lib/libc/net/gethostnamadr.c
new file mode 100644
index 0000000000..ec3f14a900
--- /dev/null
+++ b/src/lib/libc/net/gethostnamadr.c
@@ -0,0 +1,654 @@
+/*      $NetBSD: gethostnamadr.c,v 1.13 1995/05/21 16:21:14 mycroft Exp $       */
+
+/*-
+ * Copyright (c) 1985, 1988, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)gethostnamadr.c     8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$Id: gethnamaddr.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel ";
+#else
+static char rcsid[] = "$NetBSD: gethostnamadr.c,v 1.13 1995/05/21 16:21:14 mycroft Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#ifdef YP
+#include <rpc/rpc.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+#endif
+
+#define MAXALIASES      35
+#define MAXADDRS        35
+
+static char *h_addr_ptrs[MAXADDRS + 1];
+
+#ifdef YP
+static char *__ypdomain;
+#endif
+
+static struct hostent host;
+static char *host_aliases[MAXALIASES];
+static char hostbuf[BUFSIZ+1];
+static struct in_addr host_addr;
+static FILE *hostf = NULL;
+static int stayopen = 0;
+
+#if PACKETSZ > 1024
+#define MAXPACKET       PACKETSZ
+#else
+#define MAXPACKET       1024
+#endif
+
+typedef union {
+        HEADER hdr;
+        u_char buf[MAXPACKET];
+} querybuf;
+
+typedef union {
+    int32_t al;
+    char ac;
+} align;
+
+static int qcomp __P((struct in_addr **, struct in_addr **));
+static struct hostent *getanswer __P((querybuf *, int, int));
+
+extern int h_errno;
+
+static struct hostent *
+getanswer(answer, anslen, iquery)
+        querybuf *answer;
+        int anslen;
+        int iquery;
+{
+        register HEADER *hp;
+        register u_char *cp;
+        register int n;
+        u_char *eom;
+        char *bp, **ap;
+        int type, class, buflen, ancount, qdcount;
+        int haveanswer, getclass = C_ANY;
+        char **hap;
+
+        eom = answer->buf + anslen;
+        /*
+         * find first satisfactory answer
+         */
+        hp = &answer->hdr;
+        ancount = ntohs(hp->ancount);
+        qdcount = ntohs(hp->qdcount);
+        bp = hostbuf;
+        buflen = sizeof(hostbuf);
+        cp = answer->buf + sizeof(HEADER);
+        if (qdcount) {
+                if (iquery) {
+                        if ((n = dn_expand((u_char *)answer->buf,
+                            (u_char *)eom, (u_char *)cp, (u_char *)bp,
+                            buflen)) < 0) {
+                                h_errno = NO_RECOVERY;
+                                return ((struct hostent *) NULL);
+                        }
+                        cp += n + QFIXEDSZ;
+                        host.h_name = bp;
+                        n = strlen(bp) + 1;
+                        bp += n;
+                        buflen -= n;
+                } else
+                        cp += __dn_skipname(cp, eom) + QFIXEDSZ;
+                while (--qdcount > 0)
+                        cp += __dn_skipname(cp, eom) + QFIXEDSZ;
+        } else if (iquery) {
+                if (hp->aa)
+                        h_errno = HOST_NOT_FOUND;
+                else
+                        h_errno = TRY_AGAIN;
+                return ((struct hostent *) NULL);
+        }
+        ap = host_aliases;
+        *ap = NULL;
+        host.h_aliases = host_aliases;
+        hap = h_addr_ptrs;
+        *hap = NULL;
+        host.h_addr_list = h_addr_ptrs;
+        haveanswer = 0;
+        while (--ancount >= 0 && cp < eom) {
+                if ((n = dn_expand((u_char *)answer->buf, (u_char *)eom,
+                    (u_char *)cp, (u_char *)bp, buflen)) < 0)
+                        break;
+                cp += n;
+                type = _getshort(cp);
+                cp += sizeof(u_int16_t);
+                class = _getshort(cp);
+                cp += sizeof(u_int16_t) + sizeof(u_int32_t);
+                n = _getshort(cp);
+                cp += sizeof(u_int16_t);
+                if (type == T_CNAME) {
+                        cp += n;
+                        if (ap >= &host_aliases[MAXALIASES-1])
+                                continue;
+                        *ap++ = bp;
+                        n = strlen(bp) + 1;
+                        bp += n;
+                        buflen -= n;
+                        continue;
+                }
+                if (iquery && type == T_PTR) {
+                        if ((n = dn_expand((u_char *)answer->buf,
+                            (u_char *)eom, (u_char *)cp, (u_char *)bp,
+                            buflen)) < 0)
+                                break;
+                        cp += n;
+                        host.h_name = bp;
+                        return(&host);
+                }
+                if (iquery || type != T_A)  {
+#ifdef DEBUG
+                        if (_res.options & RES_DEBUG)
+                                printf("unexpected answer type %d, size %d\n",
+                                        type, n);
+#endif
+                        cp += n;
+                        continue;
+                }
+                if (haveanswer) {
+                        if (n != host.h_length) {
+                                cp += n;
+                                continue;
+                        }
+                        if (class != getclass) {
+                                cp += n;
+                                continue;
+                        }
+                } else {
+                        host.h_length = n;
+                        getclass = class;
+                        host.h_addrtype = (class == C_IN) ? AF_INET : AF_UNSPEC;
+                        if (!iquery) {
+                                host.h_name = bp;
+                                bp += strlen(bp) + 1;
+                        }
+                }
+
+                bp += sizeof(align) - ((u_long)bp % sizeof(align));
+
+                if (bp + n >= &hostbuf[sizeof(hostbuf)]) {
+#ifdef DEBUG
+                        if (_res.options & RES_DEBUG)
+                                printf("size (%d) too big\n", n);
+#endif
+                        break;
+                }
+                bcopy(cp, *hap++ = bp, n);
+                bp +=n;
+                cp += n;
+                haveanswer++;
+        }
+        if (haveanswer) {
+                *ap = NULL;
+                *hap = NULL;
+                if (_res.nsort) {
+                        qsort(host.h_addr_list, haveanswer,
+                            sizeof(struct in_addr),
+                            (int (*)__P((const void *, const void *)))qcomp);
+                }
+                return (&host);
+        } else {
+                h_errno = TRY_AGAIN;
+                return ((struct hostent *) NULL);
+        }
+}
+
+struct hostent *
+gethostbyname(name)
+        const char *name;
+{
+        querybuf buf;
+        register const char *cp;
+        int n, i;
+        extern struct hostent *_gethtbyname(), *_yp_gethtbyname();
+        register struct hostent *hp;
+        char lookups[MAXDNSLUS];
+
+        /*
+         * disallow names consisting only of digits/dots, unless
+         * they end in a dot.
+         */
+        if (isdigit(name[0]))
+                for (cp = name;; ++cp) {
+                        if (!*cp) {
+                                if (*--cp == '.')
+                                        break;
+                                /*
+                                 * All-numeric, no dot at the end.
+                                 * Fake up a hostent as if we'd actually
+                                 * done a lookup.
+                                 */
+                                if (!inet_aton(name, &host_addr)) {
+                                        h_errno = HOST_NOT_FOUND;
+                                        return((struct hostent *) NULL);
+                                }
+                                host.h_name = (char *)name;
+                                host.h_aliases = host_aliases;
+                                host_aliases[0] = NULL;
+                                host.h_addrtype = AF_INET;
+                                host.h_length = sizeof(u_int32_t);
+                                h_addr_ptrs[0] = (char *)&host_addr;
+                                h_addr_ptrs[1] = NULL;
+                                host.h_addr_list = h_addr_ptrs;
+                                return (&host);
+                        }
+                        if (!isdigit(*cp) && *cp != '.') 
+                                break;
+                }
+
+        if ((_res.options & RES_INIT) == 0 && res_init() == -1)
+                return (_gethtbyname(name));
+
+        bcopy(_res.lookups, lookups, sizeof lookups);
+        if (lookups[0] == '\0')
+                strncpy(lookups, "bf", sizeof lookups);
+
+        hp = (struct hostent *)NULL;
+        for (i = 0; i < MAXDNSLUS && hp == NULL && lookups[i]; i++) {
+                switch (lookups[i]) {
+#ifdef YP
+                case 'y':
+                        hp = _yp_gethtbyname(name);
+                        break;
+#endif
+                case 'b':
+                        if ((n = res_search(name, C_IN, T_A, buf.buf,
+                            sizeof(buf))) < 0) {
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        printf("res_search failed\n");
+#endif
+                                break;
+                        }
+                        hp = getanswer(&buf, n, 0);
+                        break;
+                case 'f':
+                        hp = _gethtbyname(name);
+                        break;
+                }
+        }
+        return (hp);
+}
+
+struct hostent *
+gethostbyaddr(addr, len, type)
+        const char *addr;
+        int len, type;
+{
+        int n, i;
+        querybuf buf;
+        register struct hostent *hp;
+        char qbuf[MAXDNAME];
+        extern struct hostent *_gethtbyaddr(), *_yp_gethtbyaddr();
+        char lookups[MAXDNSLUS];
+        
+        if (type != AF_INET)
+                return ((struct hostent *) NULL);
+        (void)sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
+                ((unsigned)addr[3] & 0xff),
+                ((unsigned)addr[2] & 0xff),
+                ((unsigned)addr[1] & 0xff),
+                ((unsigned)addr[0] & 0xff));
+
+        if ((_res.options & RES_INIT) == 0 && res_init() == -1)
+                return (_gethtbyaddr(addr, len, type));
+
+        bcopy(_res.lookups, lookups, sizeof lookups);
+        if (lookups[0] == '\0')
+                strncpy(lookups, "bf", sizeof lookups);
+
+        hp = (struct hostent *)NULL;
+        for (i = 0; i < MAXDNSLUS && hp == NULL && lookups[i]; i++) {
+                switch (lookups[i]) {
+#ifdef YP
+                case 'y':
+                        hp = _yp_gethtbyaddr(addr, len, type);
+                        break;
+#endif
+                case 'b':
+                        n = res_query(qbuf, C_IN, T_PTR, (char *)&buf, sizeof(buf));
+                        if (n < 0) {
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        printf("res_query failed\n");
+#endif
+                                break;
+                        }
+                        hp = getanswer(&buf, n, 1);
+                        if (hp == NULL)
+                                break;
+                        hp->h_addrtype = type;
+                        hp->h_length = len;
+                        h_addr_ptrs[0] = (char *)&host_addr;
+                        h_addr_ptrs[1] = (char *)0;
+                        host_addr = *(struct in_addr *)addr;
+                        break;
+                case 'f':
+                        hp = _gethtbyaddr(addr, len, type);
+                        break;
+                }
+        }
+        return (hp);
+}
+
+void
+_sethtent(f)
+        int f;
+{
+        if (hostf == NULL)
+                hostf = fopen(_PATH_HOSTS, "r" );
+        else
+                rewind(hostf);
+        stayopen = f;
+}
+
+void
+_endhtent()
+{
+        if (hostf && !stayopen) {
+                (void) fclose(hostf);
+                hostf = NULL;
+        }
+}
+
+struct hostent *
+_gethtent()
+{
+        char *p;
+        register char *cp, **q;
+
+        if (hostf == NULL && (hostf = fopen(_PATH_HOSTS, "r" )) == NULL)
+                return (NULL);
+again:
+        if ((p = fgets(hostbuf, BUFSIZ, hostf)) == NULL)
+                return (NULL);
+        if (*p == '#')
+                goto again;
+        cp = strpbrk(p, "#\n");
+        if (cp == NULL)
+                goto again;
+        *cp = '\0';
+        cp = strpbrk(p, " \t");
+        if (cp == NULL)
+                goto again;
+        *cp++ = '\0';
+        /* THIS STUFF IS INTERNET SPECIFIC */
+        h_addr_ptrs[0] = (char *)&host_addr;
+        h_addr_ptrs[1] = NULL;
+        (void) inet_aton(p, &host_addr);
+        host.h_addr_list = h_addr_ptrs;
+        host.h_length = sizeof(u_int32_t);
+        host.h_addrtype = AF_INET;
+        while (*cp == ' ' || *cp == '\t')
+                cp++;
+        host.h_name = cp;
+        q = host.h_aliases = host_aliases;
+        cp = strpbrk(cp, " \t");
+        if (cp != NULL) 
+                *cp++ = '\0';
+        while (cp && *cp) {
+                if (*cp == ' ' || *cp == '\t') {
+                        cp++;
+                        continue;
+                }
+                if (q < &host_aliases[MAXALIASES - 1])
+                        *q++ = cp;
+                cp = strpbrk(cp, " \t");
+                if (cp != NULL)
+                        *cp++ = '\0';
+        }
+        *q = NULL;
+        return (&host);
+}
+
+struct hostent *
+_gethtbyname(name)
+        char *name;
+{
+        register struct hostent *p;
+        register char **cp;
+        
+        _sethtent(0);
+        while (p = _gethtent()) {
+                if (strcasecmp(p->h_name, name) == 0)
+                        break;
+                for (cp = p->h_aliases; *cp != 0; cp++)
+                        if (strcasecmp(*cp, name) == 0)
+                                goto found;
+        }
+found:
+        _endhtent();
+        if (p==NULL)
+                h_errno = HOST_NOT_FOUND;
+        return (p);
+}
+
+struct hostent *
+_gethtbyaddr(addr, len, type)
+        const char *addr;
+        int len, type;
+{
+        register struct hostent *p;
+
+        _sethtent(0);
+        while (p = _gethtent())
+                if (p->h_addrtype == type && !bcmp(p->h_addr, addr, len))
+                        break;
+        _endhtent();
+        if (p==NULL)
+                h_errno = HOST_NOT_FOUND;
+        return (p);
+}
+
+static int
+qcomp(a1, a2)
+        struct in_addr **a1, **a2;
+{
+        int pos1, pos2;
+
+        for (pos1 = 0; pos1 < _res.nsort; pos1++)
+                if (_res.sort_list[pos1].addr.s_addr ==
+                    ((*a1)->s_addr & _res.sort_list[pos1].mask))
+                        break;
+        for (pos2 = 0; pos2 < _res.nsort; pos2++)
+                if (_res.sort_list[pos2].addr.s_addr ==
+                    ((*a2)->s_addr & _res.sort_list[pos2].mask))
+                        break;
+        return pos1 - pos2;
+}
+
+#ifdef YP
+struct hostent *
+_yphostent(line)
+        char *line;
+{
+        static struct in_addr host_addrs[MAXADDRS];
+        char *p = line;
+        char *cp, **q;
+        char **hap;
+        struct in_addr *buf;
+        int more;
+
+        host.h_name = NULL;
+        host.h_addr_list = h_addr_ptrs;
+        host.h_length = sizeof(u_int32_t);
+        host.h_addrtype = AF_INET;
+        hap = h_addr_ptrs;
+        buf = host_addrs;
+        q = host.h_aliases = host_aliases;
+
+nextline:
+        more = 0;
+        cp = strpbrk(p, " \t");
+        if (cp == NULL) {
+                if (host.h_name == NULL)
+                        return (NULL);
+                else
+                        goto done;
+        }
+        *cp++ = '\0';
+
+        *hap++ = (char *)buf;
+        (void) inet_aton(p, buf++);
+
+        while (*cp == ' ' || *cp == '\t')
+                cp++;
+        p = cp;
+        cp = strpbrk(p, " \t\n");
+        if (cp != NULL) {
+                if (*cp == '\n')
+                        more = 1;
+                *cp++ = '\0';
+        }
+        if (!host.h_name)
+                host.h_name = p;
+        else if (strcmp(host.h_name, p)==0)
+                ;
+        else if (q < &host_aliases[MAXALIASES - 1])
+                *q++ = p;
+        p = cp;
+        if (more)
+                goto nextline;
+
+        while (cp && *cp) {
+                if (*cp == ' ' || *cp == '\t') {
+                        cp++;
+                        continue;
+                }
+                if (*cp == '\n') {
+                        cp++;
+                        goto nextline;
+                }
+                if (q < &host_aliases[MAXALIASES - 1])
+                        *q++ = cp;
+                cp = strpbrk(cp, " \t");
+                if (cp != NULL)
+                        *cp++ = '\0';
+        }
+done:
+        *q = NULL;
+        *hap = NULL;
+        return (&host);
+}
+
+struct hostent *
+_yp_gethtbyaddr(addr, len, type)
+        const char *addr;
+        int len, type;
+{
+        struct hostent *hp = (struct hostent *)NULL;
+        static char *__ypcurrent;
+        int __ypcurrentlen, r;
+        char name[sizeof("xxx.xxx.xxx.xxx") + 1];
+        
+        if (!__ypdomain) {
+                if (_yp_check(&__ypdomain) == 0)
+                        return (hp);
+        }
+        sprintf(name, "%u.%u.%u.%u",
+                ((unsigned)addr[0] & 0xff),
+                ((unsigned)addr[1] & 0xff),
+                ((unsigned)addr[2] & 0xff),
+                ((unsigned)addr[3] & 0xff));
+        if (__ypcurrent)
+                free(__ypcurrent);
+        __ypcurrent = NULL;
+        r = yp_match(__ypdomain, "hosts.byaddr", name,
+                strlen(name), &__ypcurrent, &__ypcurrentlen);
+        if (r==0)
+                hp = _yphostent(__ypcurrent);
+        if (hp==NULL)
+                h_errno = HOST_NOT_FOUND;
+        return (hp);
+}
+
+struct hostent *
+_yp_gethtbyname(name)
+        const char *name;
+{
+        struct hostent *hp = (struct hostent *)NULL;
+        static char *__ypcurrent;
+        int __ypcurrentlen, r;
+
+        if (!__ypdomain) {
+                if (_yp_check(&__ypdomain) == 0)
+                        return (hp);
+        }
+        if (__ypcurrent)
+                free(__ypcurrent);
+        __ypcurrent = NULL;
+        r = yp_match(__ypdomain, "hosts.byname", name,
+                strlen(name), &__ypcurrent, &__ypcurrentlen);
+        if (r==0)
+                hp = _yphostent(__ypcurrent);
+        if (hp==NULL)
+                h_errno = HOST_NOT_FOUND;
+        return (hp);
+}
+#endif
diff --git a/src/lib/libc/net/getnetbyaddr.c b/src/lib/libc/net/getnetbyaddr.c
new file mode 100644
index 0000000000..c193860e36
--- /dev/null
+++ b/src/lib/libc/net/getnetbyaddr.c
@@ -0,0 +1,62 @@
+/*      $NetBSD: getnetbyaddr.c,v 1.4 1995/02/25 06:20:30 cgd Exp $     */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getnetbyaddr.c      8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getnetbyaddr.c,v 1.4 1995/02/25 06:20:30 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <netdb.h>
+
+extern int _net_stayopen;
+
+struct netent *
+getnetbyaddr(net, type)
+        register long net;
+        register int type;
+{
+        register struct netent *p;
+
+        setnetent(_net_stayopen);
+        while (p = getnetent())
+                if (p->n_addrtype == type && p->n_net == net)
+                        break;
+        if (!_net_stayopen)
+                endnetent();
+        return (p);
+}
diff --git a/src/lib/libc/net/getnetbyname.c b/src/lib/libc/net/getnetbyname.c
new file mode 100644
index 0000000000..93a2e1256c
--- /dev/null
+++ b/src/lib/libc/net/getnetbyname.c
@@ -0,0 +1,68 @@
+/*      $NetBSD: getnetbyname.c,v 1.4 1995/02/25 06:20:31 cgd Exp $     */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getnetbyname.c      8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getnetbyname.c,v 1.4 1995/02/25 06:20:31 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <netdb.h>
+#include <string.h>
+
+extern int _net_stayopen;
+
+struct netent *
+getnetbyname(name)
+        register const char *name;
+{
+        register struct netent *p;
+        register char **cp;
+
+        setnetent(_net_stayopen);
+        while (p = getnetent()) {
+                if (strcmp(p->n_name, name) == 0)
+                        break;
+                for (cp = p->n_aliases; *cp != 0; cp++)
+                        if (strcmp(*cp, name) == 0)
+                                goto found;
+        }
+found:
+        if (!_net_stayopen)
+                endnetent();
+        return (p);
+}
diff --git a/src/lib/libc/net/getnetent.3 b/src/lib/libc/net/getnetent.3
new file mode 100644
index 0000000000..d4f0bedbf9
--- /dev/null
+++ b/src/lib/libc/net/getnetent.3
@@ -0,0 +1,153 @@
+.\"     $NetBSD: getnetent.3,v 1.3 1995/02/25 06:20:32 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)getnetent.3 8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt GETNETENT 3
+.Os BSD 4.2
+.Sh NAME
+.Nm getnetent ,
+.Nm getnetbyaddr ,
+.Nm getnetbyname ,
+.Nm setnetent ,
+.Nm endnetent
+.Nd get network entry
+.Sh SYNOPSIS
+.Fd #include <netdb.h>
+.Ft struct netent *
+.Fn getnetent 
+.Ft struct netent *
+.Fn getnetbyname "char *name"
+.Ft struct netent *
+.Fn getnetbyaddr "long net" "int type"
+.Fn setnetent "int stayopen"
+.Fn endnetent 
+.Sh DESCRIPTION
+The
+.Fn getnetent ,
+.Fn getnetbyname ,
+and
+.Fn getnetbyaddr
+functions
+each return a pointer to an object with the
+following structure
+containing the broken-out
+fields of a line in the network data base,
+.Pa /etc/networks .
+.Bd -literal -offset indent
+struct  netent {
+        char            *n_name;        /* official name of net */
+        char            **n_aliases;    /* alias list */
+        int             n_addrtype;     /* net number type */
+        unsigned long   n_net;          /* net number */
+};
+.Ed
+.Pp
+The members of this structure are:
+.Bl -tag -width n_addrtype
+.It Fa n_name
+The official name of the network.
+.It Fa n_aliases
+A zero terminated list of alternate names for the network.
+.It Fa n_addrtype
+The type of the network number returned; currently only AF_INET.
+.It Fa n_net
+The network number.  Network numbers are returned in machine byte
+order.
+.El
+.Pp
+The
+.Fn getnetent
+function
+reads the next line of the file, opening the file if necessary.
+.Pp
+The
+.Fn setnetent
+function
+opens and rewinds the file.  If the
+.Fa stayopen
+flag is non-zero,
+the net data base will not be closed after each call to 
+.Fn getnetbyname
+or
+.Fn getnetbyaddr .
+.Pp
+The
+.Fn endnetent
+function
+closes the file.
+.Pp
+The
+.Fn getnetbyname
+function
+and
+.Fn getnetbyaddr
+sequentially search from the beginning
+of the file until a matching
+net name or
+net address and type is found,
+or until
+.Dv EOF
+is encountered.
+Network numbers are supplied in host order.
+.Sh FILES
+.Bl -tag -width /etc/networks -compact
+.It Pa /etc/networks
+.El
+.Sh DIAGNOSTICS
+Null pointer
+(0) returned on
+.Dv EOF
+or error.
+.Sh SEE ALSO
+.Xr networks 5
+.Sh HISTORY
+The
+.Fn getnetent ,
+.Fn getnetbyaddr ,
+.Fn getnetbyname ,
+.Fn setnetent ,
+and
+.Fn endnetent
+functions appeared in 
+.Bx 4.2 .
+.Sh BUGS
+The data space used by
+these functions is static; if future use requires the data, it should be
+copied before any subsequent calls to these functions overwrite it.
+Only Internet network
+numbers are currently understood.
+Expecting network numbers to fit
+in no more than 32 bits is probably
+naive.
diff --git a/src/lib/libc/net/getnetent.c b/src/lib/libc/net/getnetent.c
new file mode 100644
index 0000000000..b4e16b8f5d
--- /dev/null
+++ b/src/lib/libc/net/getnetent.c
@@ -0,0 +1,127 @@
+/*      $NetBSD: getnetent.c,v 1.4 1995/02/25 06:20:33 cgd Exp $        */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getnetent.c,v 1.4 1995/02/25 06:20:33 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+
+#define MAXALIASES      35
+
+static FILE *netf;
+static char line[BUFSIZ+1];
+static struct netent net;
+static char *net_aliases[MAXALIASES];
+int _net_stayopen;
+
+void
+setnetent(f)
+        int f;
+{
+        if (netf == NULL)
+                netf = fopen(_PATH_NETWORKS, "r" );
+        else
+                rewind(netf);
+        _net_stayopen |= f;
+}
+
+void
+endnetent()
+{
+        if (netf) {
+                fclose(netf);
+                netf = NULL;
+        }
+        _net_stayopen = 0;
+}
+
+struct netent *
+getnetent()
+{
+        char *p;
+        register char *cp, **q;
+
+        if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL)
+                return (NULL);
+again:
+        p = fgets(line, BUFSIZ, netf);
+        if (p == NULL)
+                return (NULL);
+        if (*p == '#')
+                goto again;
+        cp = strpbrk(p, "#\n");
+        if (cp == NULL)
+                goto again;
+        *cp = '\0';
+        net.n_name = p;
+        cp = strpbrk(p, " \t");
+        if (cp == NULL)
+                goto again;
+        *cp++ = '\0';
+        while (*cp == ' ' || *cp == '\t')
+                cp++;
+        p = strpbrk(cp, " \t");
+        if (p != NULL)
+                *p++ = '\0';
+        net.n_net = inet_network(cp);
+        net.n_addrtype = AF_INET;
+        q = net.n_aliases = net_aliases;
+        if (p != NULL) 
+                cp = p;
+        while (cp && *cp) {
+                if (*cp == ' ' || *cp == '\t') {
+                        cp++;
+                        continue;
+                }
+                if (q < &net_aliases[MAXALIASES - 1])
+                        *q++ = cp;
+                cp = strpbrk(cp, " \t");
+                if (cp != NULL)
+                        *cp++ = '\0';
+        }
+        *q = NULL;
+        return (&net);
+}
diff --git a/src/lib/libc/net/getproto.c b/src/lib/libc/net/getproto.c
new file mode 100644
index 0000000000..49c09b0806
--- /dev/null
+++ b/src/lib/libc/net/getproto.c
@@ -0,0 +1,61 @@
+/*      $NetBSD: getproto.c,v 1.4 1995/02/25 06:20:33 cgd Exp $ */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getproto.c  8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getproto.c,v 1.4 1995/02/25 06:20:33 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <netdb.h>
+
+extern int _proto_stayopen;
+
+struct protoent *
+getprotobynumber(proto)
+        register int proto;
+{
+        register struct protoent *p;
+
+        setprotoent(_proto_stayopen);
+        while (p = getprotoent())
+                if (p->p_proto == proto)
+                        break;
+        if (!_proto_stayopen)
+                endprotoent();
+        return (p);
+}
diff --git a/src/lib/libc/net/getprotoent.3 b/src/lib/libc/net/getprotoent.3
new file mode 100644
index 0000000000..8d607199ef
--- /dev/null
+++ b/src/lib/libc/net/getprotoent.3
@@ -0,0 +1,146 @@
+.\"     $NetBSD: getprotoent.3,v 1.3 1995/02/25 06:20:34 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)getprotoent.3       8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt GETPROTOENT 3
+.Os BSD 4.2
+.Sh NAME
+.Nm getprotoent ,
+.Nm getprotobynumber ,
+.Nm getprotobyname ,
+.Nm setprotoent ,
+.Nm endprotoent
+.Nd get protocol entry
+.Sh SYNOPSIS
+.Fd #include <netdb.h>
+.Ft struct protoent *
+.Fn getprotoent 
+.Ft struct protoent *
+.Fn getprotobyname "char *name"
+.Ft struct protoent *
+.Fn getprotobynumber "int proto"
+.Fn setprotoent "int stayopen"
+.Fn endprotoent 
+.Sh DESCRIPTION
+The
+.Fn getprotoent ,
+.Fn getprotobyname ,
+and
+.Fn getprotobynumber
+functions
+each return a pointer to an object with the
+following structure
+containing the broken-out
+fields of a line in the network protocol data base,
+.Pa /etc/protocols .
+.Bd -literal -offset indent
+.Pp
+struct  protoent {
+        char    *p_name;        /* official name of protocol */
+        char    **p_aliases;    /* alias list */
+        int     p_proto;        /* protocol number */
+};
+.Ed
+.Pp
+The members of this structure are:
+.Bl -tag -width p_aliases
+.It Fa p_name
+The official name of the protocol.
+.It Fa p_aliases
+A zero terminated list of alternate names for the protocol.
+.It Fa p_proto
+The protocol number.
+.El
+.Pp
+The
+.Fn getprotoent
+function
+reads the next line of the file, opening the file if necessary.
+.Pp
+The
+.Fn setprotoent
+function
+opens and rewinds the file.  If the
+.Fa stayopen
+flag is non-zero,
+the net data base will not be closed after each call to 
+.Fn getprotobyname
+or
+.Fn getprotobynumber .
+.Pp
+The
+.Fn endprotoent
+function
+closes the file.
+.Pp
+The
+.Fn getprotobyname
+function
+and
+.Fn getprotobynumber
+sequentially search from the beginning
+of the file until a matching
+protocol name or
+protocol number is found,
+or until
+.Dv EOF
+is encountered.
+.Sh RETURN VALUES
+Null pointer
+(0) returned on
+.Dv EOF
+or error.
+.Sh FILES
+.Bl -tag -width /etc/protocols -compact
+.It Pa /etc/protocols
+.El
+.Sh SEE ALSO
+.Xr protocols 5
+.Sh HISTORY
+The
+.Fn getprotoent ,
+.Fn getprotobynumber ,
+.Fn getprotobyname ,
+.Fn setprotoent ,
+and
+.Fn endprotoent
+functions appeared in 
+.Bx 4.2 .
+.Sh BUGS
+These functions use a static data space;
+if the data is needed for future use, it should be
+copied before any subsequent calls overwrite it.
+Only the Internet
+protocols are currently understood.
diff --git a/src/lib/libc/net/getprotoent.c b/src/lib/libc/net/getprotoent.c
new file mode 100644
index 0000000000..1179b9029b
--- /dev/null
+++ b/src/lib/libc/net/getprotoent.c
@@ -0,0 +1,125 @@
+/*      $NetBSD: getprotoent.c,v 1.4 1995/02/25 06:20:35 cgd Exp $      */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getprotoent.c       8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getprotoent.c,v 1.4 1995/02/25 06:20:35 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAXALIASES      35
+
+static FILE *protof = NULL;
+static char line[BUFSIZ+1];
+static struct protoent proto;
+static char *proto_aliases[MAXALIASES];
+int _proto_stayopen;
+
+void
+setprotoent(f)
+        int f;
+{
+        if (protof == NULL)
+                protof = fopen(_PATH_PROTOCOLS, "r" );
+        else
+                rewind(protof);
+        _proto_stayopen |= f;
+}
+
+void
+endprotoent()
+{
+        if (protof) {
+                fclose(protof);
+                protof = NULL;
+        }
+        _proto_stayopen = 0;
+}
+
+struct protoent *
+getprotoent()
+{
+        char *p;
+        register char *cp, **q;
+
+        if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
+                return (NULL);
+again:
+        if ((p = fgets(line, BUFSIZ, protof)) == NULL)
+                return (NULL);
+        if (*p == '#')
+                goto again;
+        cp = strpbrk(p, "#\n");
+        if (cp == NULL)
+                goto again;
+        *cp = '\0';
+        proto.p_name = p;
+        cp = strpbrk(p, " \t");
+        if (cp == NULL)
+                goto again;
+        *cp++ = '\0';
+        while (*cp == ' ' || *cp == '\t')
+                cp++;
+        p = strpbrk(cp, " \t");
+        if (p != NULL)
+                *p++ = '\0';
+        proto.p_proto = atoi(cp);
+        q = proto.p_aliases = proto_aliases;
+        if (p != NULL) {
+                cp = p;
+                while (cp && *cp) {
+                        if (*cp == ' ' || *cp == '\t') {
+                                cp++;
+                                continue;
+                        }
+                        if (q < &proto_aliases[MAXALIASES - 1])
+                                *q++ = cp;
+                        cp = strpbrk(cp, " \t");
+                        if (cp != NULL)
+                                *cp++ = '\0';
+                }
+        }
+        *q = NULL;
+        return (&proto);
+}
diff --git a/src/lib/libc/net/getprotoname.c b/src/lib/libc/net/getprotoname.c
new file mode 100644
index 0000000000..4f8cf21c3f
--- /dev/null
+++ b/src/lib/libc/net/getprotoname.c
@@ -0,0 +1,68 @@
+/*      $NetBSD: getprotoname.c,v 1.4 1995/02/25 06:20:36 cgd Exp $     */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getprotoname.c      8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getprotoname.c,v 1.4 1995/02/25 06:20:36 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <netdb.h>
+#include <string.h>
+
+extern int _proto_stayopen;
+
+struct protoent *
+getprotobyname(name)
+        register const char *name;
+{
+        register struct protoent *p;
+        register char **cp;
+
+        setprotoent(_proto_stayopen);
+        while (p = getprotoent()) {
+                if (strcmp(p->p_name, name) == 0)
+                        break;
+                for (cp = p->p_aliases; *cp != 0; cp++)
+                        if (strcmp(*cp, name) == 0)
+                                goto found;
+        }
+found:
+        if (!_proto_stayopen)
+                endprotoent();
+        return (p);
+}
diff --git a/src/lib/libc/net/getservbyname.c b/src/lib/libc/net/getservbyname.c
new file mode 100644
index 0000000000..b4a6311966
--- /dev/null
+++ b/src/lib/libc/net/getservbyname.c
@@ -0,0 +1,71 @@
+/*      $NetBSD: getservbyname.c,v 1.4 1995/02/25 06:20:36 cgd Exp $    */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getservbyname.c     8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getservbyname.c,v 1.4 1995/02/25 06:20:36 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <netdb.h>
+#include <string.h>
+
+extern int _serv_stayopen;
+
+struct servent *
+getservbyname(name, proto)
+        const char *name, *proto;
+{
+        register struct servent *p;
+        register char **cp;
+
+        setservent(_serv_stayopen);
+        while (p = getservent()) {
+                if (strcmp(name, p->s_name) == 0)
+                        goto gotname;
+                for (cp = p->s_aliases; *cp; cp++)
+                        if (strcmp(name, *cp) == 0)
+                                goto gotname;
+                continue;
+gotname:
+                if (proto == 0 || strcmp(p->s_proto, proto) == 0)
+                        break;
+        }
+        if (!_serv_stayopen)
+                endservent();
+        return (p);
+}
diff --git a/src/lib/libc/net/getservbyport.c b/src/lib/libc/net/getservbyport.c
new file mode 100644
index 0000000000..c34790737b
--- /dev/null
+++ b/src/lib/libc/net/getservbyport.c
@@ -0,0 +1,66 @@
+/*      $NetBSD: getservbyport.c,v 1.4 1995/02/25 06:20:37 cgd Exp $    */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getservbyport.c     8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getservbyport.c,v 1.4 1995/02/25 06:20:37 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <netdb.h>
+#include <string.h>
+
+extern int _serv_stayopen;
+
+struct servent *
+getservbyport(port, proto)
+        int port;
+        const char *proto;
+{
+        register struct servent *p;
+
+        setservent(_serv_stayopen);
+        while (p = getservent()) {
+                if (p->s_port != port)
+                        continue;
+                if (proto == 0 || strcmp(p->s_proto, proto) == 0)
+                        break;
+        }
+        if (!_serv_stayopen)
+                endservent();
+        return (p);
+}
diff --git a/src/lib/libc/net/getservent.3 b/src/lib/libc/net/getservent.3
new file mode 100644
index 0000000000..9e0656be00
--- /dev/null
+++ b/src/lib/libc/net/getservent.3
@@ -0,0 +1,157 @@
+.\"     $NetBSD: getservent.3,v 1.3 1995/02/25 06:20:38 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)getservent.3        8.3 (Berkeley) 1/12/94
+.\"
+.Dd January 12, 1994
+.Dt GETSERVENT 3
+.Os BSD 4.2
+.Sh NAME
+.Nm getservent ,
+.Nm getservbyport ,
+.Nm getservbyname ,
+.Nm setservent ,
+.Nm endservent
+.Nd get service entry
+.Sh SYNOPSIS
+.Fd #include <netdb.h>
+.Ft struct servent *
+.Fn getservent 
+.Ft struct servent *
+.Fn getservbyname "char *name" "char *proto"
+.Ft struct servent *
+.Fn getservbyport "int port" proto
+.Ft void
+.Fn setservent "int stayopen"
+.Ft void
+.Fn endservent void
+.Sh DESCRIPTION
+The
+.Fn getservent ,
+.Fn getservbyname ,
+and
+.Fn getservbyport
+functions
+each return a pointer to an object with the
+following structure
+containing the broken-out
+fields of a line in the network services data base,
+.Pa /etc/services .
+.Bd -literal -offset indent
+struct  servent {
+        char    *s_name;        /* official name of service */
+        char    **s_aliases;    /* alias list */
+        int     s_port;         /* port service resides at */
+        char    *s_proto;       /* protocol to use */
+};
+.Ed
+.Pp
+The members of this structure are:
+.Bl -tag -width s_aliases
+.It Fa s_name
+The official name of the service.
+.It Fa s_aliases
+A zero terminated list of alternate names for the service.
+.It Fa s_port
+The port number at which the service resides.
+Port numbers are returned in network byte order.
+.It Fa s_proto
+The name of the protocol to use when contacting the
+service.
+.El
+.Pp
+The
+.Fn getservent
+function
+reads the next line of the file, opening the file if necessary.
+.Pp
+The
+.Fn setservent
+function
+opens and rewinds the file.  If the
+.Fa stayopen
+flag is non-zero,
+the net data base will not be closed after each call to 
+.Fn getservbyname
+or
+.Fn getservbyport .
+.Pp
+The
+.Fn endservent
+function
+closes the file.
+.Pp
+The
+.Fn getservbyname
+and
+.Fn getservbyport
+functions
+sequentially search from the beginning
+of the file until a matching
+protocol name or
+port number is found,
+or until
+.Dv EOF
+is encountered.
+If a protocol name is also supplied (non-
+.Dv NULL ) , 
+searches must also match the protocol.
+.ne 1i
+.Sh FILES
+.Bl -tag -width /etc/services -compact
+.It Pa /etc/services
+.El
+.Sh DIAGNOSTICS
+Null pointer
+(0) returned on
+.Dv EOF
+or error.
+.Sh SEE ALSO
+.Xr getprotoent 3 ,
+.Xr services 5
+.Sh HISTORY
+The
+.Fn getservent ,
+.Fn getservbyport ,
+.Fn getservbyname ,
+.Fn setservent ,
+and
+.Fn endservent
+functions appeared in 
+.Bx 4.2 .
+.Sh BUGS
+These functions use static data storage;
+if the data is needed for future use, it should be
+copied before any subsequent calls overwrite it.
+Expecting port numbers to fit in a 32 bit
+quantity is probably naive.
diff --git a/src/lib/libc/net/getservent.c b/src/lib/libc/net/getservent.c
new file mode 100644
index 0000000000..316891450e
--- /dev/null
+++ b/src/lib/libc/net/getservent.c
@@ -0,0 +1,127 @@
+/*      $NetBSD: getservent.c,v 1.4 1995/02/25 06:20:38 cgd Exp $       */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getservent.c        8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: getservent.c,v 1.4 1995/02/25 06:20:38 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define MAXALIASES      35
+
+static FILE *servf = NULL;
+static char line[BUFSIZ+1];
+static struct servent serv;
+static char *serv_aliases[MAXALIASES];
+int _serv_stayopen;
+
+void
+setservent(f)
+        int f;
+{
+        if (servf == NULL)
+                servf = fopen(_PATH_SERVICES, "r" );
+        else
+                rewind(servf);
+        _serv_stayopen |= f;
+}
+
+void
+endservent()
+{
+        if (servf) {
+                fclose(servf);
+                servf = NULL;
+        }
+        _serv_stayopen = 0;
+}
+
+struct servent *
+getservent()
+{
+        char *p;
+        register char *cp, **q;
+
+        if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL)
+                return (NULL);
+again:
+        if ((p = fgets(line, BUFSIZ, servf)) == NULL)
+                return (NULL);
+        if (*p == '#')
+                goto again;
+        cp = strpbrk(p, "#\n");
+        if (cp == NULL)
+                goto again;
+        *cp = '\0';
+        serv.s_name = p;
+        p = strpbrk(p, " \t");
+        if (p == NULL)
+                goto again;
+        *p++ = '\0';
+        while (*p == ' ' || *p == '\t')
+                p++;
+        cp = strpbrk(p, ",/");
+        if (cp == NULL)
+                goto again;
+        *cp++ = '\0';
+        serv.s_port = htons((u_short)atoi(p));
+        serv.s_proto = cp;
+        q = serv.s_aliases = serv_aliases;
+        cp = strpbrk(cp, " \t");
+        if (cp != NULL)
+                *cp++ = '\0';
+        while (cp && *cp) {
+                if (*cp == ' ' || *cp == '\t') {
+                        cp++;
+                        continue;
+                }
+                if (q < &serv_aliases[MAXALIASES - 1])
+                        *q++ = cp;
+                cp = strpbrk(cp, " \t");
+                if (cp != NULL)
+                        *cp++ = '\0';
+        }
+        *q = NULL;
+        return (&serv);
+}
diff --git a/src/lib/libc/net/herror.c b/src/lib/libc/net/herror.c
new file mode 100644
index 0000000000..41adbf1055
--- /dev/null
+++ b/src/lib/libc/net/herror.c
@@ -0,0 +1,115 @@
+/*      $NetBSD: herror.c,v 1.5 1995/02/25 06:20:39 cgd Exp $   */
+
+/*-
+ * Copyright (c) 1987, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)herror.c    8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$Id: herror.c,v 4.9.1.1 1993/05/02 23:14:35 vixie Rel ";
+#else
+static char rcsid[] = "$NetBSD: herror.c,v 1.5 1995/02/25 06:20:39 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <string.h>
+
+char    *h_errlist[] = {
+        "Error 0",
+        "Unknown host",                         /* 1 HOST_NOT_FOUND */
+        "Host name lookup failure",             /* 2 TRY_AGAIN */
+        "Unknown server error",                 /* 3 NO_RECOVERY */
+        "No address associated with name",      /* 4 NO_ADDRESS */
+};
+int     h_nerr = { sizeof(h_errlist)/sizeof(h_errlist[0]) };
+
+extern int      h_errno;
+
+/*
+ * herror --
+ *      print the error indicated by the h_errno value.
+ */
+void
+herror(s)
+        const char *s;
+{
+        struct iovec iov[4];
+        register struct iovec *v = iov;
+
+        if (s && *s) {
+                v->iov_base = (char *)s;
+                v->iov_len = strlen(s);
+                v++;
+                v->iov_base = ": ";
+                v->iov_len = 2;
+                v++;
+        }
+        v->iov_base = (u_int)h_errno < h_nerr ?
+            h_errlist[h_errno] : "Unknown error";
+        v->iov_len = strlen(v->iov_base);
+        v++;
+        v->iov_base = "\n";
+        v->iov_len = 1;
+        writev(STDERR_FILENO, iov, (v - iov) + 1);
+}
+
+char *
+hstrerror(err)
+        int err;
+{
+        return (u_int)err < h_nerr ? h_errlist[err] : "Unknown resolver error";
+}
diff --git a/src/lib/libc/net/htonl.c b/src/lib/libc/net/htonl.c
new file mode 100644
index 0000000000..ac85cb0fd7
--- /dev/null
+++ b/src/lib/libc/net/htonl.c
@@ -0,0 +1,29 @@
+/*      $NetBSD: htonl.c,v 1.5 1995/04/28 23:25:14 jtc Exp $    */
+
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$NetBSD: htonl.c,v 1.5 1995/04/28 23:25:14 jtc Exp $";
+#endif
+
+#include <sys/types.h>
+#include <machine/endian.h>
+
+#undef htonl
+
+unsigned long
+htonl(x)
+        unsigned long x;
+{
+        u_int32_t y = x;
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+        u_char *s = (u_char *)&y;
+        return s[0] << 24 | s[1] << 16 | s[2] << 8 | s[3];
+#else
+        return y;
+#endif
+}
diff --git a/src/lib/libc/net/htons.c b/src/lib/libc/net/htons.c
new file mode 100644
index 0000000000..b2500a51d1
--- /dev/null
+++ b/src/lib/libc/net/htons.c
@@ -0,0 +1,27 @@
+/*      $NetBSD: htons.c,v 1.5 1995/04/28 23:25:19 jtc Exp $    */
+
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$NetBSD: htons.c,v 1.5 1995/04/28 23:25:19 jtc Exp $";
+#endif
+
+#include <sys/types.h>
+#include <machine/endian.h>
+
+#undef htons
+
+unsigned short
+htons(x)
+        unsigned short x;
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+        u_char *s = (u_char *) &x;
+        return s[0] << 8 | s[1];
+#else
+        return x;
+#endif
+}
diff --git a/src/lib/libc/net/inet.3 b/src/lib/libc/net/inet.3
new file mode 100644
index 0000000000..49bac97e96
--- /dev/null
+++ b/src/lib/libc/net/inet.3
@@ -0,0 +1,197 @@
+.\"     $NetBSD: inet.3,v 1.4 1995/02/27 09:45:26 chopps Exp $
+.\"
+.\" Copyright (c) 1983, 1990, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)inet.3      8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt INET 3
+.Os BSD 4.2
+.Sh NAME
+.Nm inet_aton ,
+.Nm inet_addr ,
+.Nm inet_network ,
+.Nm inet_ntoa ,
+.Nm inet_makeaddr ,
+.Nm inet_lnaof ,
+.Nm inet_netof
+.Nd Internet address manipulation routines
+.Sh SYNOPSIS
+.Fd #include <sys/socket.h>
+.Fd #include <netinet/in.h>
+.Fd #include <arpa/inet.h>
+.Ft int 
+.Fn inet_aton "const char *cp" "struct in_addr *pin"
+.Ft unsigned long 
+.Fn inet_addr "const char *cp"
+.Ft unsigned long 
+.Fn inet_network "const char *cp"
+.Ft char *
+.Fn inet_ntoa "struct in_addr in"
+.Ft struct in_addr 
+.Fn inet_makeaddr "int net" "int lna"
+.Ft unsigned long 
+.Fn inet_lnaof "struct in_addr in"
+.Ft unsigned long 
+.Fn inet_netof "struct in_addr in"
+.Sh DESCRIPTION
+The routines
+.Fn inet_aton ,
+.Fn inet_addr
+and
+.Fn inet_network
+interpret character strings representing
+numbers expressed in the Internet standard
+.Ql \&.
+notation.
+The
+.Fn inet_aton
+routine interprets the specified character string as an Internet address,
+placing the address into the structure provided.
+It returns 1 if the string was successfully interpreted,
+or 0 if the string is invalid.
+The
+.Fn inet_addr
+and
+.Fn inet_network
+functions return numbers suitable for use
+as Internet addresses and Internet network
+numbers, respectively.
+The routine
+.Fn inet_ntoa
+takes an Internet address and returns an
+.Tn ASCII
+string representing the address in
+.Ql \&.
+notation.  The routine
+.Fn inet_makeaddr
+takes an Internet network number and a local
+network address and constructs an Internet address
+from it.  The routines
+.Fn inet_netof
+and
+.Fn inet_lnaof
+break apart Internet host addresses, returning
+the network number and local network address part,
+respectively.
+.Pp
+All Internet addresses are returned in network
+order (bytes ordered from left to right).
+All network numbers and local address parts are
+returned as machine format integer values.
+.Sh INTERNET ADDRESSES
+Values specified using the
+.Ql \&.
+notation take one
+of the following forms:
+.Bd -literal -offset indent
+a.b.c.d
+a.b.c
+a.b
+a
+.Ed
+.Pp
+When four parts are specified, each is interpreted
+as a byte of data and assigned, from left to right,
+to the four bytes of an Internet address.  Note
+that when an Internet address is viewed as a 32-bit
+integer quantity on the
+.Tn VAX
+the bytes referred to
+above appear as
+.Dq Li d.c.b.a .
+That is,
+.Tn VAX
+bytes are
+ordered from right to left.
+.Pp
+When a three part address is specified, the last
+part is interpreted as a 16-bit quantity and placed
+in the right-most two bytes of the network address.
+This makes the three part address format convenient
+for specifying Class B network addresses as
+.Dq Li 128.net.host .
+.Pp
+When a two part address is supplied, the last part
+is interpreted as a 24-bit quantity and placed in
+the right most three bytes of the network address.
+This makes the two part address format convenient
+for specifying Class A network addresses as
+.Dq Li net.host .
+.Pp
+When only one part is given, the value is stored
+directly in the network address without any byte
+rearrangement.
+.Pp
+All numbers supplied as
+.Dq parts
+in a
+.Ql  \&.
+notation
+may be decimal, octal, or hexadecimal, as specified
+in the C language (i.e., a leading 0x or 0X implies
+hexadecimal; otherwise, a leading 0 implies octal;
+otherwise, the number is interpreted as decimal).
+.Sh DIAGNOSTICS
+The constant
+.Dv INADDR_NONE
+is returned by
+.Fn inet_addr
+and
+.Fn inet_network
+for malformed requests.
+.Sh SEE ALSO
+.Xr gethostbyname 3 ,
+.Xr getnetent 3 ,
+.Xr hosts 5 ,
+.Xr networks 5 ,
+.Sh HISTORY
+These
+functions appeared in 
+.Bx 4.2 .
+.Sh BUGS
+The value
+.Dv INADDR_NONE
+(0xffffffff) is a valid broadcast address, but
+.Fn inet_addr
+cannot return that value without indicating failure.
+The newer
+.Fn inet_aton
+function does not share this problem.
+The problem of host byte ordering versus network byte ordering is
+confusing.
+The string returned by
+.Fn inet_ntoa
+resides in a static memory area.
+.Pp
+Inet_addr should return a
+.Fa struct in_addr .
diff --git a/src/lib/libc/net/inet_addr.c b/src/lib/libc/net/inet_addr.c
new file mode 100644
index 0000000000..b5b9d8302f
--- /dev/null
+++ b/src/lib/libc/net/inet_addr.c
@@ -0,0 +1,158 @@
+/*      $NetBSD: inet_addr.c,v 1.5 1995/02/25 06:20:41 cgd Exp $        */
+
+/*
+ * Copyright (c) 1983, 1990, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_addr.c 8.1 (Berkeley) 6/17/93";
+#else
+static char rcsid[] = "$NetBSD: inet_addr.c,v 1.5 1995/02/25 06:20:41 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+/*
+ * Ascii internet address interpretation routine.
+ * The value returned is in network order.
+ */
+u_long
+inet_addr(cp)
+        register const char *cp;
+{
+        struct in_addr val;
+
+        if (inet_aton(cp, &val))
+                return (val.s_addr);
+        return (INADDR_NONE);
+}
+
+/* 
+ * Check whether "cp" is a valid ascii representation
+ * of an Internet address and convert to a binary address.
+ * Returns 1 if the address is valid, 0 if not.
+ * This replaces inet_addr, the return value from which
+ * cannot distinguish between failure and a local broadcast address.
+ */
+int
+inet_aton(cp, addr)
+        register const char *cp;
+        struct in_addr *addr;
+{
+        register u_long val;
+        register int base, n;
+        register char c;
+        u_int parts[4];
+        register u_int *pp = parts;
+
+        for (;;) {
+                /*
+                 * Collect number up to ``.''.
+                 * Values are specified as for C:
+                 * 0x=hex, 0=octal, other=decimal.
+                 */
+                val = 0; base = 10;
+                if (*cp == '0') {
+                        if (*++cp == 'x' || *cp == 'X')
+                                base = 16, cp++;
+                        else
+                                base = 8;
+                }
+                while ((c = *cp) != '\0') {
+                        if (isascii(c) && isdigit(c)) {
+                                val = (val * base) + (c - '0');
+                                cp++;
+                                continue;
+                        }
+                        if (base == 16 && isascii(c) && isxdigit(c)) {
+                                val = (val << 4) + 
+                                        (c + 10 - (islower(c) ? 'a' : 'A'));
+                                cp++;
+                                continue;
+                        }
+                        break;
+                }
+                if (*cp == '.') {
+                        /*
+                         * Internet format:
+                         *      a.b.c.d
+                         *      a.b.c   (with c treated as 16-bits)
+                         *      a.b     (with b treated as 24 bits)
+                         */
+                        if (pp >= parts + 3 || val > 0xff)
+                                return (0);
+                        *pp++ = val, cp++;
+                } else
+                        break;
+        }
+        /*
+         * Check for trailing characters.
+         */
+        if (*cp && (!isascii(*cp) || !isspace(*cp)))
+                return (0);
+        /*
+         * Concoct the address according to
+         * the number of parts specified.
+         */
+        n = pp - parts + 1;
+        switch (n) {
+
+        case 1:                         /* a -- 32 bits */
+                break;
+
+        case 2:                         /* a.b -- 8.24 bits */
+                if (val > 0xffffff)
+                        return (0);
+                val |= parts[0] << 24;
+                break;
+
+        case 3:                         /* a.b.c -- 8.8.16 bits */
+                if (val > 0xffff)
+                        return (0);
+                val |= (parts[0] << 24) | (parts[1] << 16);
+                break;
+
+        case 4:                         /* a.b.c.d -- 8.8.8.8 bits */
+                if (val > 0xff)
+                        return (0);
+                val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
+                break;
+        }
+        if (addr)
+                addr->s_addr = htonl(val);
+        return (1);
+}
diff --git a/src/lib/libc/net/inet_lnaof.c b/src/lib/libc/net/inet_lnaof.c
new file mode 100644
index 0000000000..ce1257bf68
--- /dev/null
+++ b/src/lib/libc/net/inet_lnaof.c
@@ -0,0 +1,65 @@
+/*      $NetBSD: inet_lnaof.c,v 1.4 1995/02/25 06:20:42 cgd Exp $       */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_lnaof.c        8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: inet_lnaof.c,v 1.4 1995/02/25 06:20:42 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*
+ * Return the local network address portion of an
+ * internet address; handles class a/b/c network
+ * number formats.
+ */
+u_long
+inet_lnaof(in)
+        struct in_addr in;
+{
+        register u_long i = ntohl(in.s_addr);
+
+        if (IN_CLASSA(i))
+                return ((i)&IN_CLASSA_HOST);
+        else if (IN_CLASSB(i))
+                return ((i)&IN_CLASSB_HOST);
+        else
+                return ((i)&IN_CLASSC_HOST);
+}
diff --git a/src/lib/libc/net/inet_makeaddr.c b/src/lib/libc/net/inet_makeaddr.c
new file mode 100644
index 0000000000..84d366e03a
--- /dev/null
+++ b/src/lib/libc/net/inet_makeaddr.c
@@ -0,0 +1,68 @@
+/*      $NetBSD: inet_makeaddr.c,v 1.4 1995/02/25 06:20:42 cgd Exp $    */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_makeaddr.c     8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: inet_makeaddr.c,v 1.4 1995/02/25 06:20:42 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*
+ * Formulate an Internet address from network + host.  Used in
+ * building addresses stored in the ifnet structure.
+ */
+struct in_addr
+inet_makeaddr(net, host)
+        u_long net, host;
+{
+        u_long addr;
+
+        if (net < 128)
+                addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
+        else if (net < 65536)
+                addr = (net << IN_CLASSB_NSHIFT) | (host & IN_CLASSB_HOST);
+        else if (net < 16777216L)
+                addr = (net << IN_CLASSC_NSHIFT) | (host & IN_CLASSC_HOST);
+        else
+                addr = net | host;
+        addr = htonl(addr);
+        return (*(struct in_addr *)&addr);
+}
diff --git a/src/lib/libc/net/inet_netof.c b/src/lib/libc/net/inet_netof.c
new file mode 100644
index 0000000000..02f52ca318
--- /dev/null
+++ b/src/lib/libc/net/inet_netof.c
@@ -0,0 +1,64 @@
+/*      $NetBSD: inet_netof.c,v 1.4 1995/02/25 06:20:43 cgd Exp $       */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_netof.c        8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: inet_netof.c,v 1.4 1995/02/25 06:20:43 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+/*
+ * Return the network number from an internet
+ * address; handles class a/b/c network #'s.
+ */
+u_long
+inet_netof(in)
+        struct in_addr in;
+{
+        register u_long i = ntohl(in.s_addr);
+
+        if (IN_CLASSA(i))
+                return (((i)&IN_CLASSA_NET) >> IN_CLASSA_NSHIFT);
+        else if (IN_CLASSB(i))
+                return (((i)&IN_CLASSB_NET) >> IN_CLASSB_NSHIFT);
+        else
+                return (((i)&IN_CLASSC_NET) >> IN_CLASSC_NSHIFT);
+}
diff --git a/src/lib/libc/net/inet_network.c b/src/lib/libc/net/inet_network.c
new file mode 100644
index 0000000000..35105fa75a
--- /dev/null
+++ b/src/lib/libc/net/inet_network.c
@@ -0,0 +1,99 @@
+/*      $NetBSD: inet_network.c,v 1.4 1995/02/25 06:20:45 cgd Exp $     */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_network.c      8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: inet_network.c,v 1.4 1995/02/25 06:20:45 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+/*
+ * Internet network address interpretation routine.
+ * The library routines call this routine to interpret
+ * network numbers.
+ */
+u_long
+inet_network(cp)
+        register const char *cp;
+{
+        register u_long val, base, n;
+        register char c;
+        u_long parts[4], *pp = parts;
+        register int i;
+
+again:
+        val = 0; base = 10;
+        if (*cp == '0')
+                base = 8, cp++;
+        if (*cp == 'x' || *cp == 'X')
+                base = 16, cp++;
+        while (c = *cp) {
+                if (isdigit(c)) {
+                        val = (val * base) + (c - '0');
+                        cp++;
+                        continue;
+                }
+                if (base == 16 && isxdigit(c)) {
+                        val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
+                        cp++;
+                        continue;
+                }
+                break;
+        }
+        if (*cp == '.') {
+                if (pp >= parts + 4)
+                        return (INADDR_NONE);
+                *pp++ = val, cp++;
+                goto again;
+        }
+        if (*cp && !isspace(*cp))
+                return (INADDR_NONE);
+        *pp++ = val;
+        n = pp - parts;
+        if (n > 4)
+                return (INADDR_NONE);
+        for (val = 0, i = 0; i < n; i++) {
+                val <<= 8;
+                val |= parts[i] & 0xff;
+        }
+        return (val);
+}
diff --git a/src/lib/libc/net/inet_ntoa.c b/src/lib/libc/net/inet_ntoa.c
new file mode 100644
index 0000000000..2da0ab00ff
--- /dev/null
+++ b/src/lib/libc/net/inet_ntoa.c
@@ -0,0 +1,65 @@
+/*      $NetBSD: inet_ntoa.c,v 1.4 1995/02/25 06:20:46 cgd Exp $        */
+
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)inet_ntoa.c 8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: inet_ntoa.c,v 1.4 1995/02/25 06:20:46 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Convert network-format internet address
+ * to base 256 d.d.d.d representation.
+ */
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+
+char *
+inet_ntoa(in)
+        struct in_addr in;
+{
+        static char b[18];
+        register char *p;
+
+        p = (char *)&in;
+#define UC(b)   (((int)b)&0xff)
+        (void)snprintf(b, sizeof(b),
+            "%d.%d.%d.%d", UC(p[0]), UC(p[1]), UC(p[2]), UC(p[3]));
+        return (b);
+}
diff --git a/src/lib/libc/net/iso_addr.3 b/src/lib/libc/net/iso_addr.3
new file mode 100644
index 0000000000..95c136e5fc
--- /dev/null
+++ b/src/lib/libc/net/iso_addr.3
@@ -0,0 +1,112 @@
+.\"     $NetBSD: iso_addr.3,v 1.2 1995/02/25 06:20:46 cgd Exp $
+.\"
+.\" Copyright (c) 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)iso_addr.3  8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt ISO_ADDR 3
+.Os
+.Sh NAME
+.Nm iso_addr ,
+.Nm iso_ntoa
+.Nd "elementary network address conversion routines for Open System Interconnection
+.Sh SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <netiso/iso.h>
+.Ft struct iso_addr *
+.Fn iso_addr "char *cp"
+.Ft char *
+.Fn iso_ntoa "struct iso_addr *isoa"
+.Sh DESCRIPTION
+The routine
+.Fn iso_addr
+interprets character strings representing
+.Tn OSI
+addresses, returning binary information suitable
+for use in system calls.
+The routine
+.Fn iso_ntoa
+takes
+.Tn OSI
+addresses and returns
+.Tn ASCII
+strings representing NSAPs (network service
+access points) in a
+notation inverse to that accepted by 
+.Fn iso_addr .
+.Pp
+Unfortunately, no universal standard exists for representing
+.Tn OSI
+network addresses.
+.Pp
+The format employed by
+.Fn iso_addr
+is a sequence of hexadecimal
+.Dq digits
+(optionally separated by periods),
+of the form:
+.Bd -filled -offset indent
+<hex digits>.<hex digits>.<hex digits>
+.Ed
+.Pp
+Each pair of hexadecimal digits represents a byte
+with the leading digit indicating the higher-ordered bits.
+A period following an even number of bytes has no
+effect (but may be used to increase legibility).
+A period following an odd number of bytes has the
+effect of causing the byte of address being translated
+to have its higher order bits filled with zeros.
+.Sh RETURN VALUES
+.Fn iso_ntoa
+always returns a null terminated string.
+.Fn iso_addr
+always returns a pointer to a struct iso_addr.
+(See
+.Sx BUGS . )
+.Sh SEE ALSO
+.Xr iso 4
+.Sh HISTORY
+The
+.Fn iso_addr
+and
+.Fn iso_ntoa
+functions appeared in 
+.Bx 4.3 Reno .
+.Sh BUGS
+The returned values
+reside in a static memory area.
+.Pp
+The function
+.Fn iso_addr
+should diagnose improperly formed input, and there should be an unambiguous
+way to recognize this.
diff --git a/src/lib/libc/net/iso_addr.c b/src/lib/libc/net/iso_addr.c
new file mode 100644
index 0000000000..c26ec1a64a
--- /dev/null
+++ b/src/lib/libc/net/iso_addr.c
@@ -0,0 +1,125 @@
+/*      $NetBSD: iso_addr.c,v 1.4 1995/02/25 06:20:47 cgd Exp $ */
+
+/*
+ * Copyright (c) 1989, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)iso_addr.c  8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: iso_addr.c,v 1.4 1995/02/25 06:20:47 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <netiso/iso.h>
+#include <string.h>
+
+/* States*/
+#define VIRGIN  0
+#define GOTONE  1
+#define GOTTWO  2
+/* Inputs */
+#define DIGIT   (4*0)
+#define END     (4*1)
+#define DELIM   (4*2)
+
+struct iso_addr *
+iso_addr(addr)
+        register const char *addr;
+{
+        static struct iso_addr out_addr;
+        register char *cp = out_addr.isoa_genaddr;
+        char *cplim = cp + sizeof(out_addr.isoa_genaddr);
+        register int byte = 0, state = VIRGIN, new;
+
+        bzero((char *)&out_addr, sizeof(out_addr));
+        do {
+                if ((*addr >= '0') && (*addr <= '9')) {
+                        new = *addr - '0';
+                } else if ((*addr >= 'a') && (*addr <= 'f')) {
+                        new = *addr - 'a' + 10;
+                } else if ((*addr >= 'A') && (*addr <= 'F')) {
+                        new = *addr - 'A' + 10;
+                } else if (*addr == 0) 
+                        state |= END;
+                else
+                        state |= DELIM;
+                addr++;
+                switch (state /* | INPUT */) {
+                case GOTTWO | DIGIT:
+                        *cp++ = byte; /*FALLTHROUGH*/
+                case VIRGIN | DIGIT:
+                        state = GOTONE; byte = new; continue;
+                case GOTONE | DIGIT:
+                        state = GOTTWO; byte = new + (byte << 4); continue;
+                default: /* | DELIM */
+                        state = VIRGIN; *cp++ = byte; byte = 0; continue;
+                case GOTONE | END:
+                case GOTTWO | END:
+                        *cp++ = byte; /* FALLTHROUGH */
+                case VIRGIN | END:
+                        break;
+                }
+                break;
+        } while (cp < cplim); 
+        out_addr.isoa_len = cp - out_addr.isoa_genaddr;
+        return (&out_addr);
+}
+static char hexlist[] = "0123456789abcdef";
+
+char *
+iso_ntoa(isoa)
+        const struct iso_addr *isoa;
+{
+        static char obuf[64];
+        register char *out = obuf; 
+        register int i;
+        register u_char *in = (u_char *)isoa->isoa_genaddr;
+        u_char *inlim = in + isoa->isoa_len;
+
+        out[1] = 0;
+        while (in < inlim) {
+                i = *in++;
+                *out++ = '.';
+                if (i > 0xf) {
+                        out[1] = hexlist[i & 0xf];
+                        i >>= 4;
+                        out[0] = hexlist[i];
+                        out += 2;
+                } else
+                        *out++ = hexlist[i];
+        }
+        *out = 0;
+        return(obuf + 1);
+}
diff --git a/src/lib/libc/net/linkaddr.3 b/src/lib/libc/net/linkaddr.3
new file mode 100644
index 0000000000..1a2af9b30d
--- /dev/null
+++ b/src/lib/libc/net/linkaddr.3
@@ -0,0 +1,133 @@
+.\"     $NetBSD: linkaddr.3,v 1.2 1995/02/25 06:20:48 cgd Exp $
+.\"
+.\" Copyright (c) 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" Donn Seeley at BSDI.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)linkaddr.3  8.1 (Berkeley) 7/28/93
+.\"
+.Dd July 28, 1993
+.Dt LINK_ADDR 3
+.Os BSD 4.4
+.Sh NAME
+.Nm link_addr ,
+.Nm link_ntoa
+.Nd elementary address specification routines for link level access
+.Sh SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <sys/socket.h>
+.Fd #include <net/if_dl.h>
+.Ft void
+.Fn link_addr "const char *addr" "struct sockaddr_dl *sdl"
+.Ft char *
+.Fn link_ntoa "const struct sockaddr_dl *sdl"
+.Sh DESCRIPTION
+The routine
+.Fn link_addr
+interprets character strings representing
+link-level addresses, returning binary information suitable
+for use in system calls.
+The routine
+.Fn link_ntoa
+takes
+a link-level
+address and returns an
+.Tn ASCII
+string representing some of the information present,
+including the link level address itself, and the interface name
+or number, if present.
+This facility is experimental and is
+still subject to change.
+.Pp
+For
+.Fn link_addr ,
+the string
+.Fa addr
+may contain
+an optional network interface identifier of the form
+.Dq "name unit-number" ,
+suitable for the first argument to
+.Xr ifconfig 4 ,
+followed in all cases by a colon and
+an interface address in the form of
+groups of hexadecimal digits
+separated by periods.
+Each group represents a byte of address;
+address bytes are filled left to right from
+low order bytes through high order bytes.
+.Pp
+.\" A regular expression may make this format clearer:
+.\" .Bd -literal -offset indent
+.\" ([a-z]+[0-9]+:)?[0-9a-f]+(\e.[0-9a-f]+)*
+.\" .Ed
+.\" .Pp
+Thus
+.Li le0:8.0.9.13.d.30
+represents an ethernet address
+to be transmitted on the first Lance ethernet interface.
+.Sh RETURN VALUES
+.Fn link_ntoa
+always returns a null terminated string.
+.Fn link_addr
+has no return value.
+(See
+.Sx BUGS . )
+.Sh SEE ALSO
+.Xr iso 4 ,
+.Sh HISTORY
+The
+.Fn link_addr
+and
+.Fn link_ntoa
+functions appeared in 
+.Bx 4.3 Reno  .
+.Sh BUGS
+The returned values for link_ntoa
+reside in a static memory area.
+.Pp
+The function
+.Fn link_addr
+should diagnose improperly formed input, and there should be an unambiguous
+way to recognize this.
+.Pp
+If the
+.Va sdl_len
+field of the link socket address
+.Fa sdl
+is 0,
+.Fn link_ntoa
+will not insert a colon before the interface address bytes.
+If this translated address is given to
+.Fn link_addr
+without inserting an initial colon,
+the latter will not interpret it correctly.
diff --git a/src/lib/libc/net/linkaddr.c b/src/lib/libc/net/linkaddr.c
new file mode 100644
index 0000000000..19a0de3abd
--- /dev/null
+++ b/src/lib/libc/net/linkaddr.c
@@ -0,0 +1,164 @@
+/*      $NetBSD: linkaddr.c,v 1.5 1995/02/25 06:20:49 cgd Exp $ */
+
+/*-
+ * Copyright (c) 1990, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)linkaddr.c  8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: linkaddr.c,v 1.5 1995/02/25 06:20:49 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if_dl.h>
+#include <string.h>
+
+/* States*/
+#define NAMING  0
+#define GOTONE  1
+#define GOTTWO  2
+#define RESET   3
+/* Inputs */
+#define DIGIT   (4*0)
+#define END     (4*1)
+#define DELIM   (4*2)
+#define LETTER  (4*3)
+
+void
+link_addr(addr, sdl)
+        register const char *addr;
+        register struct sockaddr_dl *sdl;
+{
+        register char *cp = sdl->sdl_data;
+        char *cplim = sdl->sdl_len + (char *)sdl;
+        register int byte = 0, state = NAMING, new;
+
+        bzero((char *)&sdl->sdl_family, sdl->sdl_len - 1);
+        sdl->sdl_family = AF_LINK;
+        do {
+                state &= ~LETTER;
+                if ((*addr >= '0') && (*addr <= '9')) {
+                        new = *addr - '0';
+                } else if ((*addr >= 'a') && (*addr <= 'f')) {
+                        new = *addr - 'a' + 10;
+                } else if ((*addr >= 'A') && (*addr <= 'F')) {
+                        new = *addr - 'A' + 10;
+                } else if (*addr == 0) {
+                        state |= END;
+                } else if (state == NAMING &&
+                           (((*addr >= 'A') && (*addr <= 'Z')) ||
+                           ((*addr >= 'a') && (*addr <= 'z'))))
+                        state |= LETTER;
+                else
+                        state |= DELIM;
+                addr++;
+                switch (state /* | INPUT */) {
+                case NAMING | DIGIT:
+                case NAMING | LETTER:
+                        *cp++ = addr[-1];
+                        continue;
+                case NAMING | DELIM:
+                        state = RESET;
+                        sdl->sdl_nlen = cp - sdl->sdl_data;
+                        continue;
+                case GOTTWO | DIGIT:
+                        *cp++ = byte;
+                        /* FALLTHROUGH */
+                case RESET | DIGIT:
+                        state = GOTONE;
+                        byte = new;
+                        continue;
+                case GOTONE | DIGIT:
+                        state = GOTTWO;
+                        byte = new + (byte << 4);
+                        continue;
+                default: /* | DELIM */
+                        state = RESET;
+                        *cp++ = byte;
+                        byte = 0;
+                        continue;
+                case GOTONE | END:
+                case GOTTWO | END:
+                        *cp++ = byte;
+                        /* FALLTHROUGH */
+                case RESET | END:
+                        break;
+                }
+                break;
+        } while (cp < cplim); 
+        sdl->sdl_alen = cp - LLADDR(sdl);
+        new = cp - (char *)sdl;
+        if (new > sizeof(*sdl))
+                sdl->sdl_len = new;
+        return;
+}
+
+static char hexlist[] = "0123456789abcdef";
+
+char *
+link_ntoa(sdl)
+        register const struct sockaddr_dl *sdl;
+{
+        static char obuf[64];
+        register char *out = obuf; 
+        register int i;
+        register u_char *in = (u_char *)LLADDR(sdl);
+        u_char *inlim = in + sdl->sdl_alen;
+        int firsttime = 1;
+
+        if (sdl->sdl_nlen) {
+                bcopy(sdl->sdl_data, obuf, sdl->sdl_nlen);
+                out += sdl->sdl_nlen;
+                if (sdl->sdl_alen)
+                        *out++ = ':';
+        }
+        while (in < inlim) {
+                if (firsttime)
+                        firsttime = 0;
+                else
+                        *out++ = '.';
+                i = *in++;
+                if (i > 0xf) {
+                        out[1] = hexlist[i & 0xf];
+                        i >>= 4;
+                        out[0] = hexlist[i];
+                        out += 2;
+                } else
+                        *out++ = hexlist[i];
+        }
+        *out = 0;
+        return (obuf);
+}
diff --git a/src/lib/libc/net/ns.3 b/src/lib/libc/net/ns.3
new file mode 100644
index 0000000000..f89b4fe042
--- /dev/null
+++ b/src/lib/libc/net/ns.3
@@ -0,0 +1,132 @@
+.\"     $NetBSD: ns.3,v 1.3 1995/02/25 06:20:50 cgd Exp $
+.\"
+.\" Copyright (c) 1986, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)ns.3        8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt NS 3
+.Os BSD 4.3
+.Sh NAME
+.Nm ns_addr ,
+.Nm ns_ntoa
+.Nd Xerox
+.Tn NS Ns (tm)
+address conversion routines
+.Sh SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <netns/ns.h>
+.Ft struct ns_addr 
+.Fn ns_addr "char *cp"
+.Ft char *
+.Fn ns_ntoa "struct ns_addr ns"
+.Sh DESCRIPTION
+The routine
+.Fn ns_addr
+interprets character strings representing
+.Tn XNS
+addresses, returning binary information suitable
+for use in system calls.
+The routine
+.Fn ns_ntoa
+takes
+.Tn XNS
+addresses and returns
+.Tn ASCII
+strings representing the address in a
+notation in common use in the Xerox Development Environment:
+.Bd -filled -offset indent
+<network number>.<host number>.<port number>
+.Ed
+.Pp
+Trailing zero fields are suppressed, and each number is printed in hexadecimal,
+in a format suitable for input to 
+.Fn ns_addr .
+Any fields lacking super-decimal digits will have a
+trailing
+.Ql H
+appended.
+.Pp
+Unfortunately, no universal standard exists for representing
+.Tn XNS
+addresses.
+An effort has been made to insure that
+.Fn ns_addr
+be compatible with most formats in common use.
+It will first separate an address into 1 to 3 fields using a single delimiter
+chosen from
+period
+.Ql \&. ,
+colon
+.Ql \&:
+or pound-sign
+.Ql \&# .
+Each field is then examined for byte separators (colon or period).
+If there are byte separators, each subfield separated is taken to be
+a small hexadecimal number, and the entirety is taken as a network-byte-ordered
+quantity to be zero extended in the high-network-order bytes.
+Next, the field is inspected for hyphens, in which case
+the field is assumed to be a number in decimal notation
+with hyphens separating the millenia.
+Next, the field is assumed to be a number:
+It is interpreted
+as hexadecimal if there is a leading
+.Ql 0x
+(as in C),
+a trailing
+.Ql H
+(as in Mesa), or there are any super-decimal digits present.
+It is interpreted as octal is there is a leading
+.Ql 0
+and there are no super-octal digits.
+Otherwise, it is converted as a decimal number.
+.Sh RETURN VALUES
+None. (See
+.Sx BUGS . )
+.Sh SEE ALSO
+.Xr hosts 5 ,
+.Xr networks 5 ,
+.Sh HISTORY
+The
+.Fn ns_addr
+and
+.Fn ns_toa
+functions appeared in 
+.Bx 4.3 .
+.Sh BUGS
+The string returned by
+.Fn ns_ntoa
+resides in a static memory area.
+The function
+.Fn ns_addr
+should diagnose improperly formed input, and there should be an unambiguous
+way to recognize this.
diff --git a/src/lib/libc/net/ns_addr.c b/src/lib/libc/net/ns_addr.c
new file mode 100644
index 0000000000..f75ddb23b7
--- /dev/null
+++ b/src/lib/libc/net/ns_addr.c
@@ -0,0 +1,233 @@
+/*      $NetBSD: ns_addr.c,v 1.5 1995/02/25 06:20:51 cgd Exp $  */
+
+/*
+ * Copyright (c) 1986, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * J.Q. Johnson.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)ns_addr.c   8.1 (Berkeley) 6/7/93";
+#else
+static char rcsid[] = "$NetBSD: ns_addr.c,v 1.5 1995/02/25 06:20:51 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netns/ns.h>
+#include <stdio.h>
+#include <string.h>
+
+static struct ns_addr addr, zero_addr;
+
+static void Field(), cvtbase();
+
+struct ns_addr 
+ns_addr(name)
+        const char *name;
+{
+        char separator;
+        char *hostname, *socketname, *cp;
+        char buf[50];
+
+        (void)strncpy(buf, name, sizeof(buf) - 1);
+        buf[sizeof(buf) - 1] = '\0';
+
+        /*
+         * First, figure out what he intends as a field separtor.
+         * Despite the way this routine is written, the prefered
+         * form  2-272.AA001234H.01777, i.e. XDE standard.
+         * Great efforts are made to insure backward compatability.
+         */
+        if (hostname = strchr(buf, '#'))
+                separator = '#';
+        else {
+                hostname = strchr(buf, '.');
+                if ((cp = strchr(buf, ':')) &&
+                    ((hostname && cp < hostname) || (hostname == 0))) {
+                        hostname = cp;
+                        separator = ':';
+                } else
+                        separator = '.';
+        }
+        if (hostname)
+                *hostname++ = 0;
+
+        addr = zero_addr;
+        Field(buf, addr.x_net.c_net, 4);
+        if (hostname == 0)
+                return (addr);  /* No separator means net only */
+
+        socketname = strchr(hostname, separator);
+        if (socketname) {
+                *socketname++ = 0;
+                Field(socketname, (u_char *)&addr.x_port, 2);
+        }
+
+        Field(hostname, addr.x_host.c_host, 6);
+
+        return (addr);
+}
+
+static void
+Field(buf, out, len)
+        char *buf;
+        u_char *out;
+        int len;
+{
+        register char *bp = buf;
+        int i, ibase, base16 = 0, base10 = 0, clen = 0;
+        int hb[6], *hp;
+        char *fmt;
+
+        /*
+         * first try 2-273#2-852-151-014#socket
+         */
+        if ((*buf != '-') &&
+            (1 < (i = sscanf(buf, "%d-%d-%d-%d-%d",
+                        &hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) {
+                cvtbase(1000L, 256, hb, i, out, len);
+                return;
+        }
+        /*
+         * try form 8E1#0.0.AA.0.5E.E6#socket
+         */
+        if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x",
+                        &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
+                cvtbase(256L, 256, hb, i, out, len);
+                return;
+        }
+        /*
+         * try form 8E1#0:0:AA:0:5E:E6#socket
+         */
+        if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x",
+                        &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
+                cvtbase(256L, 256, hb, i, out, len);
+                return;
+        }
+        /*
+         * This is REALLY stretching it but there was a
+         * comma notation separting shorts -- definitely non standard
+         */
+        if (1 < (i = sscanf(buf,"%x,%x,%x",
+                        &hb[0], &hb[1], &hb[2]))) {
+                hb[0] = htons(hb[0]); hb[1] = htons(hb[1]);
+                hb[2] = htons(hb[2]);
+                cvtbase(65536L, 256, hb, i, out, len);
+                return;
+        }
+
+        /* Need to decide if base 10, 16 or 8 */
+        while (*bp) switch (*bp++) {
+
+        case '0': case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '-':
+                break;
+
+        case '8': case '9':
+                base10 = 1;
+                break;
+
+        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+                base16 = 1;
+                break;
+        
+        case 'x': case 'X':
+                *--bp = '0';
+                base16 = 1;
+                break;
+
+        case 'h': case 'H':
+                base16 = 1;
+                /* fall into */
+
+        default:
+                *--bp = 0; /* Ends Loop */
+        }
+        if (base16) {
+                fmt = "%3x";
+                ibase = 4096;
+        } else if (base10 == 0 && *buf == '0') {
+                fmt = "%3o";
+                ibase = 512;
+        } else {
+                fmt = "%3d";
+                ibase = 1000;
+        }
+
+        for (bp = buf; *bp++; ) clen++;
+        if (clen == 0) clen++;
+        if (clen > 18) clen = 18;
+        i = ((clen - 1) / 3) + 1;
+        bp = clen + buf - 3;
+        hp = hb + i - 1;
+
+        while (hp > hb) {
+                (void)sscanf(bp, fmt, hp);
+                bp[0] = 0;
+                hp--;
+                bp -= 3;
+        }
+        (void)sscanf(buf, fmt, hp);
+        cvtbase((long)ibase, 256, hb, i, out, len);
+}
+
+static void
+cvtbase(oldbase,newbase,input,inlen,result,reslen)
+        long oldbase;
+        int newbase;
+        int input[];
+        int inlen;
+        unsigned char result[];
+        int reslen;
+{
+        int d, e;
+        long sum;
+
+        e = 1;
+        while (e > 0 && reslen > 0) {
+                d = 0; e = 0; sum = 0;
+                /* long division: input=input/newbase */
+                while (d < inlen) {
+                        sum = sum*oldbase + (long) input[d];
+                        e += (sum > 0);
+                        input[d++] = sum / newbase;
+                        sum %= newbase;
+                }
+                result[--reslen] = sum; /* accumulate remainder */
+        }
+        for (d=0; d < reslen; d++)
+                result[d] = 0;
+}
diff --git a/src/lib/libc/net/ns_ntoa.c b/src/lib/libc/net/ns_ntoa.c
new file mode 100644
index 0000000000..ad3265399b
--- /dev/null
+++ b/src/lib/libc/net/ns_ntoa.c
@@ -0,0 +1,106 @@
+/*      $NetBSD: ns_ntoa.c,v 1.4 1995/02/25 06:20:51 cgd Exp $  */
+
+/*
+ * Copyright (c) 1986, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)ns_ntoa.c   8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: ns_ntoa.c,v 1.4 1995/02/25 06:20:51 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netns/ns.h>
+#include <stdio.h>
+
+char *
+ns_ntoa(addr)
+        struct ns_addr addr;
+{
+        static char obuf[40];
+        union { union ns_net net_e; u_long long_e; } net;
+        u_short port = htons(addr.x_port);
+        register char *cp;
+        char *cp2;
+        register u_char *up = addr.x_host.c_host;
+        u_char *uplim = up + 6;
+        static char *spectHex();
+
+        net.net_e = addr.x_net;
+        sprintf(obuf, "%lx", ntohl(net.long_e));
+        cp = spectHex(obuf);
+        cp2 = cp + 1;
+        while (*up==0 && up < uplim) up++;
+        if (up == uplim) {
+                if (port) {
+                        sprintf(cp, ".0");
+                        cp += 2;
+                }
+        } else {
+                sprintf(cp, ".%x", *up++);
+                while (up < uplim) {
+                        while (*cp) cp++;
+                        sprintf(cp, "%02x", *up++);
+                }
+                cp = spectHex(cp2);
+        }
+        if (port) {
+                sprintf(cp, ".%x", port);
+                spectHex(cp + 1);
+        }
+        return (obuf);
+}
+
+static char *
+spectHex(p0)
+        char *p0;
+{
+        int ok = 0;
+        int nonzero = 0;
+        register char *p = p0;
+        for (; *p; p++) switch (*p) {
+
+        case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
+                *p += ('A' - 'a');
+                /* fall into . . . */
+        case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
+                ok = 1;
+        case '1': case '2': case '3': case '4': case '5':
+        case '6': case '7': case '8': case '9':
+                nonzero = 1;
+        }
+        if (nonzero && !ok) { *p++ = 'H'; *p = 0; }
+        return (p);
+}
diff --git a/src/lib/libc/net/ntohl.c b/src/lib/libc/net/ntohl.c
new file mode 100644
index 0000000000..05b7f4c9a3
--- /dev/null
+++ b/src/lib/libc/net/ntohl.c
@@ -0,0 +1,29 @@
+/*      $NetBSD: ntohl.c,v 1.5 1995/04/28 23:25:21 jtc Exp $    */
+
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$NetBSD: ntohl.c,v 1.5 1995/04/28 23:25:21 jtc Exp $";
+#endif
+
+#include <sys/types.h>
+#include <machine/endian.h>
+
+#undef ntohl
+
+unsigned long
+ntohl(x)
+        unsigned long x;
+{
+        u_int32_t y = x;
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+        u_char *s = (u_char *)&y;
+        return s[0] << 24 | s[1] << 16 | s[2] << 8 | s[3];
+#else
+        return y;
+#endif
+}
diff --git a/src/lib/libc/net/ntohs.c b/src/lib/libc/net/ntohs.c
new file mode 100644
index 0000000000..93ab83ee4d
--- /dev/null
+++ b/src/lib/libc/net/ntohs.c
@@ -0,0 +1,27 @@
+/*      $NetBSD: ntohs.c,v 1.5 1995/04/28 23:25:23 jtc Exp $    */
+
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char *rcsid = "$NetBSD: ntohs.c,v 1.5 1995/04/28 23:25:23 jtc Exp $";
+#endif
+
+#include <sys/types.h>
+#include <machine/endian.h>
+
+#undef ntohs
+
+unsigned short
+ntohs(x)
+        unsigned short x;
+{
+#if BYTE_ORDER == LITTLE_ENDIAN
+        u_char *s = (u_char *) &x;
+        return s[0] << 8 | s[1];
+#else
+        return x;
+#endif
+}
diff --git a/src/lib/libc/net/rcmd.3 b/src/lib/libc/net/rcmd.3
new file mode 100644
index 0000000000..4db847c392
--- /dev/null
+++ b/src/lib/libc/net/rcmd.3
@@ -0,0 +1,204 @@
+.\"     $NetBSD: rcmd.3,v 1.8 1995/02/25 06:20:52 cgd Exp $
+.\"
+.\" Copyright (c) 1983, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)rcmd.3      8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt RCMD 3
+.Os BSD 4.2
+.Sh NAME
+.Nm rcmd ,
+.Nm rresvport ,
+.Nm iruserok ,
+.Nm ruserok
+.Nd routines for returning a stream to a remote command
+.Sh SYNOPSIS
+.Fd #include <unistd.h>
+.Ft int
+.Fn rcmd "char **ahost" "int inport" "const char *locuser" "const char *remuser" "const char *cmd" "int *fd2p"
+.Ft int
+.Fn rresvport "int *port"
+.Ft int
+.Fn iruserok "u_long raddr" "int superuser" "const char *ruser" "const char *luser"
+.Ft int
+.Fn ruserok "const char *rhost" "int superuser" "const char *ruser" "const char *luser"
+.Sh DESCRIPTION
+The
+.Fn rcmd
+function
+is used by the super-user to execute a command on
+a remote machine using an authentication scheme based
+on reserved port numbers.
+The
+.Fn rresvport
+function
+returns a descriptor to a socket
+with an address in the privileged port space.
+The
+.Fn iruserok
+and
+.Fn ruserok
+functions are used by servers
+to authenticate clients requesting service with
+.Fn rcmd .
+All four functions are present in the same file and are used
+by the
+.Xr rshd 8
+server (among others).
+.Pp
+The
+.Fn rcmd
+function
+looks up the host
+.Fa *ahost
+using
+.Xr gethostbyname 3 ,
+returning \-1 if the host does not exist.
+Otherwise
+.Fa *ahost
+is set to the standard name of the host
+and a connection is established to a server
+residing at the well-known Internet port
+.Fa inport .
+.Pp
+If the connection succeeds,
+a socket in the Internet domain of type
+.Dv SOCK_STREAM
+is returned to the caller, and given to the remote
+command as 
+.Em stdin
+and
+.Em stdout .
+If
+.Fa fd2p
+is non-zero, then an auxiliary channel to a control
+process will be set up, and a descriptor for it will be placed
+in
+.Fa *fd2p .
+The control process will return diagnostic
+output from the command (unit 2) on this channel, and will also
+accept bytes on this channel as being
+.Tn UNIX
+signal numbers, to be
+forwarded to the process group of the command.
+If
+.Fa fd2p
+is 0, then the 
+.Em stderr
+(unit 2 of the remote
+command) will be made the same as the 
+.Em stdout
+and no
+provision is made for sending arbitrary signals to the remote process,
+although you may be able to get its attention by using out-of-band data.
+.Pp
+The protocol is described in detail in
+.Xr rshd 8 .
+.Pp
+The
+.Fn rresvport
+function is used to obtain a socket with a privileged
+address bound to it.  This socket is suitable for use
+by 
+.Fn rcmd
+and several other functions.  Privileged Internet ports are those
+in the range 0 to 1023.  Only the super-user
+is allowed to bind an address of this sort to a socket.
+.Pp
+The
+.Fn iruserok
+and
+.Fn ruserok
+functions take a remote host's IP address or name, respectively,
+two user names and a flag indicating whether the local user's
+name is that of the super-user.
+Then, if the user is
+.Em NOT
+the super-user, it checks the
+.Pa /etc/hosts.equiv
+file.
+If that lookup is not done, or is unsuccessful, the
+.Pa .rhosts
+in the local user's home directory is checked to see if the request for
+service is allowed.
+.Pp
+If this file does not exist, is not a regular file, is owned by anyone
+other than the user or the super-user, or is writeable by anyone other
+than the owner, the check automatically fails.
+Zero is returned if the machine name is listed in the
+.Dq Pa hosts.equiv
+file, or the host and remote user name are found in the
+.Dq Pa .rhosts
+file; otherwise
+.Fn iruserok
+and
+.Fn ruserok
+return \-1.
+If the local domain (as obtained from
+.Xr gethostname 2 )
+is the same as the remote domain, only the machine name need be specified.
+.Pp
+If the IP address of the remote host is known,
+.Fn iruserok
+should be used in preference to
+.Fn ruserok ,
+as it does not require trusting the DNS server for the remote host's domain.
+.Sh DIAGNOSTICS
+The
+.Fn rcmd
+function
+returns a valid socket descriptor on success.
+It returns \-1 on error and prints a diagnostic message on the standard error.
+.Pp
+The
+.Fn rresvport
+function
+returns a valid, bound socket descriptor on success.
+It returns \-1 on error with the global value
+.Va errno
+set according to the reason for failure.
+The error code
+.Dv EAGAIN
+is overloaded to mean ``All network ports in use.''
+.Sh SEE ALSO
+.Xr rlogin 1 ,
+.Xr rsh 1 ,
+.Xr intro 2 ,
+.Xr rexec 3 ,
+.Xr rexecd 8 ,
+.Xr rlogind 8 ,
+.Xr rshd 8
+.Sh HISTORY
+These
+functions appeared in 
+.Bx 4.2 .
diff --git a/src/lib/libc/net/rcmd.c b/src/lib/libc/net/rcmd.c
new file mode 100644
index 0000000000..e0310031b0
--- /dev/null
+++ b/src/lib/libc/net/rcmd.c
@@ -0,0 +1,517 @@
+/*      $NetBSD: rcmd.c,v 1.12 1995/06/03 22:33:34 mycroft Exp $        */
+
+/*
+ * Copyright (c) 1983, 1993, 1994
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)rcmd.c      8.3 (Berkeley) 3/26/94";
+#else
+static char *rcsid = "$NetBSD: rcmd.c,v 1.12 1995/06/03 22:33:34 mycroft Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <signal.h>
+#include <fcntl.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+int     __ivaliduser __P((FILE *, u_long, const char *, const char *));
+static int __icheckhost __P((u_long, const char *));
+
+int
+rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
+        char **ahost;
+        u_short rport;
+        const char *locuser, *remuser, *cmd;
+        int *fd2p;
+{
+        struct hostent *hp;
+        struct sockaddr_in sin, from;
+        fd_set reads;
+        long oldmask;
+        pid_t pid;
+        int s, lport, timo;
+        char c;
+
+        pid = getpid();
+        hp = gethostbyname(*ahost);
+        if (hp == NULL) {
+                herror(*ahost);
+                return (-1);
+        }
+        *ahost = hp->h_name;
+        oldmask = sigblock(sigmask(SIGURG));
+        for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
+                s = rresvport(&lport);
+                if (s < 0) {
+                        if (errno == EAGAIN)
+                                (void)fprintf(stderr,
+                                    "rcmd: socket: All ports in use\n");
+                        else
+                                (void)fprintf(stderr, "rcmd: socket: %s\n",
+                                    strerror(errno));
+                        sigsetmask(oldmask);
+                        return (-1);
+                }
+                fcntl(s, F_SETOWN, pid);
+                sin.sin_len = sizeof(struct sockaddr_in);
+                sin.sin_family = hp->h_addrtype;
+                sin.sin_port = rport;
+                bcopy(hp->h_addr_list[0], &sin.sin_addr, hp->h_length);
+                if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+                        break;
+                (void)close(s);
+                if (errno == EADDRINUSE) {
+                        lport--;
+                        continue;
+                }
+                if (errno == ECONNREFUSED && timo <= 16) {
+                        (void)sleep(timo);
+                        timo *= 2;
+                        continue;
+                }
+                if (hp->h_addr_list[1] != NULL) {
+                        int oerrno = errno;
+
+                        (void)fprintf(stderr, "connect to address %s: ",
+                            inet_ntoa(sin.sin_addr));
+                        errno = oerrno;
+                        perror(0);
+                        hp->h_addr_list++;
+                        bcopy(hp->h_addr_list[0], &sin.sin_addr, hp->h_length);
+                        (void)fprintf(stderr, "Trying %s...\n",
+                            inet_ntoa(sin.sin_addr));
+                        continue;
+                }
+                (void)fprintf(stderr, "%s: %s\n", hp->h_name, strerror(errno));
+                sigsetmask(oldmask);
+                return (-1);
+        }
+        lport--;
+        if (fd2p == 0) {
+                write(s, "", 1);
+                lport = 0;
+        } else {
+                char num[8];
+                int s2 = rresvport(&lport), s3;
+                int len = sizeof(from);
+
+                if (s2 < 0)
+                        goto bad;
+                listen(s2, 1);
+                (void)snprintf(num, sizeof(num), "%d", lport);
+                if (write(s, num, strlen(num)+1) != strlen(num)+1) {
+                        (void)fprintf(stderr,
+                            "rcmd: write (setting up stderr): %s\n",
+                            strerror(errno));
+                        (void)close(s2);
+                        goto bad;
+                }
+                FD_ZERO(&reads);
+                FD_SET(s, &reads);
+                FD_SET(s2, &reads);
+                errno = 0;
+                if (select(MAX(s, s2) + 1, &reads, 0, 0, 0) < 1 ||
+                    !FD_ISSET(s2, &reads)) {
+                        if (errno != 0)
+                                (void)fprintf(stderr,
+                                    "rcmd: select (setting up stderr): %s\n",
+                                    strerror(errno));
+                        else
+                                (void)fprintf(stderr,
+                                "select: protocol failure in circuit setup\n");
+                        (void)close(s2);
+                        goto bad;
+                }
+                s3 = accept(s2, (struct sockaddr *)&from, &len);
+                (void)close(s2);
+                if (s3 < 0) {
+                        (void)fprintf(stderr,
+                            "rcmd: accept: %s\n", strerror(errno));
+                        lport = 0;
+                        goto bad;
+                }
+                *fd2p = s3;
+                from.sin_port = ntohs(from.sin_port);
+                if (from.sin_family != AF_INET ||
+                    from.sin_port >= IPPORT_RESERVED ||
+                    from.sin_port < IPPORT_RESERVED / 2) {
+                        (void)fprintf(stderr,
+                            "socket: protocol failure in circuit setup.\n");
+                        goto bad2;
+                }
+        }
+        (void)write(s, locuser, strlen(locuser)+1);
+        (void)write(s, remuser, strlen(remuser)+1);
+        (void)write(s, cmd, strlen(cmd)+1);
+        if (read(s, &c, 1) != 1) {
+                (void)fprintf(stderr,
+                    "rcmd: %s: %s\n", *ahost, strerror(errno));
+                goto bad2;
+        }
+        if (c != 0) {
+                while (read(s, &c, 1) == 1) {
+                        (void)write(STDERR_FILENO, &c, 1);
+                        if (c == '\n')
+                                break;
+                }
+                goto bad2;
+        }
+        sigsetmask(oldmask);
+        return (s);
+bad2:
+        if (lport)
+                (void)close(*fd2p);
+bad:
+        (void)close(s);
+        sigsetmask(oldmask);
+        return (-1);
+}
+
+int
+rresvport(alport)
+        int *alport;
+{
+        struct sockaddr_in sin;
+        int s;
+
+        sin.sin_len = sizeof(struct sockaddr_in);
+        sin.sin_family = AF_INET;
+        sin.sin_addr.s_addr = INADDR_ANY;
+        s = socket(AF_INET, SOCK_STREAM, 0);
+        if (s < 0)
+                return (-1);
+        for (;;) {
+                sin.sin_port = htons((u_short)*alport);
+                if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+                        return (s);
+                if (errno != EADDRINUSE) {
+                        (void)close(s);
+                        return (-1);
+                }
+                (*alport)--;
+                if (*alport == IPPORT_RESERVED/2) {
+                        (void)close(s);
+                        errno = EAGAIN;         /* close */
+                        return (-1);
+                }
+        }
+}
+
+int     __check_rhosts_file = 1;
+char    *__rcmd_errstr;
+
+int
+ruserok(rhost, superuser, ruser, luser)
+        const char *rhost, *ruser, *luser;
+        int superuser;
+{
+        struct hostent *hp;
+        char **ap;
+        int i;
+#define MAXADDRS        35
+        u_long addrs[MAXADDRS + 1];
+
+        if ((hp = gethostbyname(rhost)) == NULL)
+                return (-1);
+        for (i = 0, ap = hp->h_addr_list; *ap && i < MAXADDRS; ++ap, ++i)
+                bcopy(*ap, &addrs[i], sizeof(addrs[i]));
+        addrs[i] = 0;
+
+        for (i = 0; i < MAXADDRS && addrs[i]; i++)
+                if (iruserok(addrs[i], superuser, ruser, luser) == 0)
+                        return (0);
+        return (-1);
+}
+
+/*
+ * New .rhosts strategy: We are passed an ip address. We spin through
+ * hosts.equiv and .rhosts looking for a match. When the .rhosts only
+ * has ip addresses, we don't have to trust a nameserver.  When it
+ * contains hostnames, we spin through the list of addresses the nameserver
+ * gives us and look for a match.
+ *
+ * Returns 0 if ok, -1 if not ok.
+ */
+int
+iruserok(raddr, superuser, ruser, luser)
+        u_long raddr;
+        int superuser;
+        const char *ruser, *luser;
+{
+        register char *cp;
+        struct stat sbuf;
+        struct passwd *pwd;
+        FILE *hostf;
+        uid_t uid;
+        int first;
+        char pbuf[MAXPATHLEN];
+
+        first = 1;
+        hostf = superuser ? NULL : fopen(_PATH_HEQUIV, "r");
+again:
+        if (hostf) {
+                if (__ivaliduser(hostf, raddr, luser, ruser) == 0) {
+                        (void)fclose(hostf);
+                        return (0);
+                }
+                (void)fclose(hostf);
+        }
+        if (first == 1 && (__check_rhosts_file || superuser)) {
+                first = 0;
+                if ((pwd = getpwnam(luser)) == NULL)
+                        return (-1);
+                (void)strcpy(pbuf, pwd->pw_dir);
+                (void)strcat(pbuf, "/.rhosts");
+
+                /*
+                 * Change effective uid while opening .rhosts.  If root and
+                 * reading an NFS mounted file system, can't read files that
+                 * are protected read/write owner only.
+                 */
+                uid = geteuid();
+                (void)seteuid(pwd->pw_uid);
+                hostf = fopen(pbuf, "r");
+                (void)seteuid(uid);
+
+                if (hostf == NULL)
+                        return (-1);
+                /*
+                 * If not a regular file, or is owned by someone other than
+                 * user or root or if writeable by anyone but the owner, quit.
+                 */
+                cp = NULL;
+                if (lstat(pbuf, &sbuf) < 0)
+                        cp = ".rhosts lstat failed";
+                else if (!S_ISREG(sbuf.st_mode))
+                        cp = ".rhosts not regular file";
+                else if (fstat(fileno(hostf), &sbuf) < 0)
+                        cp = ".rhosts fstat failed";
+                else if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid)
+                        cp = "bad .rhosts owner";
+                else if (sbuf.st_mode & (S_IWGRP|S_IWOTH))
+                        cp = ".rhosts writeable by other than owner";
+                /* If there were any problems, quit. */
+                if (cp) {
+                        __rcmd_errstr = cp;
+                        (void)fclose(hostf);
+                        return (-1);
+                }
+                goto again;
+        }
+        return (-1);
+}
+
+/*
+ * XXX
+ * Don't make static, used by lpd(8).
+ *
+ * Returns 0 if ok, -1 if not ok.
+ */
+int
+__ivaliduser(hostf, raddr, luser, ruser)
+        FILE *hostf;
+        u_long raddr;
+        const char *luser, *ruser;
+{
+        register char *user, *p;
+        int ch;
+        char buf[MAXHOSTNAMELEN + 128];         /* host + login */
+        const char *auser, *ahost;
+        int hostok, userok;
+        char rhost[MAXHOSTNAMELEN];
+        struct hostent *hp;
+        char domain[MAXHOSTNAMELEN];
+
+        getdomainname(domain, sizeof(domain));
+
+        while (fgets(buf, sizeof(buf), hostf)) {
+                p = buf;
+                /* Skip lines that are too long. */
+                if (strchr(p, '\n') == NULL) {
+                        while ((ch = getc(hostf)) != '\n' && ch != EOF);
+                        continue;
+                }
+                while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
+                        *p = isupper(*p) ? tolower(*p) : *p;
+                        p++;
+                }
+                if (*p == ' ' || *p == '\t') {
+                        *p++ = '\0';
+                        while (*p == ' ' || *p == '\t')
+                                p++;
+                        user = p;
+                        while (*p != '\n' && *p != ' ' &&
+                            *p != '\t' && *p != '\0')
+                                p++;
+                } else
+                        user = p;
+                *p = '\0';
+
+                if (p == buf)
+                        continue;
+
+                auser = *user ? user : luser;
+                ahost = buf;
+
+                if ((hp = gethostbyaddr((char *) &raddr,
+                                        sizeof(raddr), AF_INET)) == NULL) {
+                        abort();
+                        return -1;
+                }
+                (void) strncpy(rhost, hp->h_name, sizeof(rhost));
+                rhost[sizeof(rhost) - 1] = '\0';
+
+                if (ahost[0] == '+')
+                        switch (ahost[1]) {
+                        case '\0':
+                                hostok = 1;
+                                break;
+
+                        case '@':
+                                hostok = innetgr(&ahost[2], rhost, NULL,
+                                                 domain);
+                                break;
+
+                        default:
+                                hostok = __icheckhost(raddr, &ahost[1]);
+                                break;
+                        }
+                else if (ahost[0] == '-')
+                        switch (ahost[1]) {
+                        case '\0':
+                                hostok = -1;
+                                break;
+
+                        case '@':
+                                hostok = -innetgr(&ahost[2], rhost, NULL,
+                                                  domain);
+                                break;
+
+                        default:
+                                hostok = -__icheckhost(raddr, &ahost[1]);
+                                break;
+                        }
+                else
+                        hostok = __icheckhost(raddr, ahost);
+
+
+                if (auser[0] == '+')
+                        switch (auser[1]) {
+                        case '\0':
+                                userok = 1;
+                                break;
+
+                        case '@':
+                                userok = innetgr(&auser[2], NULL, ruser,
+                                                 domain);
+                                break;
+
+                        default:
+                                userok = strcmp(ruser, &auser[1]) == 0;
+                                break;
+                        }
+                else if (auser[0] == '-')
+                        switch (auser[1]) {
+                        case '\0':
+                                userok = -1;
+                                break;
+
+                        case '@':
+                                userok = -innetgr(&auser[2], NULL, ruser,
+                                                  domain);
+                                break;
+
+                        default:
+                                userok = -(strcmp(ruser, &auser[1]) == 0);
+                                break;
+                        }
+                else
+                        userok = strcmp(ruser, auser) == 0;
+
+                /* Check if one component did not match */
+                if (hostok == 0 || userok == 0)
+                        continue;
+
+                /* Check if we got a forbidden pair */
+                if (userok == -1 || hostok == -1)
+                        return -1;
+
+                /* Check if we got a valid pair */
+                if (hostok == 1 && userok == 1)
+                        return 0;
+        }
+        return -1;
+}
+
+/*
+ * Returns "true" if match, 0 if no match.
+ */
+static int
+__icheckhost(raddr, lhost)
+        u_long raddr;
+        const char *lhost;
+{
+        register struct hostent *hp;
+        register u_long laddr;
+        register char **pp;
+
+        /* Try for raw ip address first. */
+        if (isdigit(*lhost) && (long)(laddr = inet_addr(lhost)) != -1)
+                return (raddr == laddr);
+
+        /* Better be a hostname. */
+        if ((hp = gethostbyname(lhost)) == NULL)
+                return (0);
+
+        /* Spin through ip addresses. */
+        for (pp = hp->h_addr_list; *pp; ++pp)
+                if (!bcmp(&raddr, *pp, sizeof(u_long)))
+                        return (1);
+
+        /* No match. */
+        return (0);
+}
diff --git a/src/lib/libc/net/recv.c b/src/lib/libc/net/recv.c
new file mode 100644
index 0000000000..44296378cb
--- /dev/null
+++ b/src/lib/libc/net/recv.c
@@ -0,0 +1,56 @@
+/*      $NetBSD: recv.c,v 1.6 1995/02/25 06:20:54 cgd Exp $     */
+
+/*
+ * Copyright (c) 1988, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)recv.c      8.2 (Berkeley) 2/21/94";
+#else
+static char rcsid[] = "$NetBSD: recv.c,v 1.6 1995/02/25 06:20:54 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <stddef.h>
+
+ssize_t
+recv(s, buf, len, flags)
+        int s, flags;
+        size_t len;
+        void *buf;
+{
+        return (recvfrom(s, buf, len, flags, NULL, 0));
+}
diff --git a/src/lib/libc/net/res_comp.c b/src/lib/libc/net/res_comp.c
new file mode 100644
index 0000000000..9d7bbecdda
--- /dev/null
+++ b/src/lib/libc/net/res_comp.c
@@ -0,0 +1,364 @@
+/*      $NetBSD: res_comp.c,v 1.6 1995/02/25 06:20:55 cgd Exp $ */
+
+/*-
+ * Copyright (c) 1985, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_comp.c  8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$Id: res_comp.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel ";
+#else
+static char rcsid[] = "$NetBSD: res_comp.c,v 1.6 1995/02/25 06:20:55 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <arpa/nameser.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <stdio.h>
+
+static int dn_find();
+
+/*
+ * Expand compressed domain name 'comp_dn' to full domain name.
+ * 'msg' is a pointer to the begining of the message,
+ * 'eomorig' points to the first location after the message,
+ * 'exp_dn' is a pointer to a buffer of size 'length' for the result.
+ * Return size of compressed name or -1 if there was an error.
+ */
+dn_expand(msg, eomorig, comp_dn, exp_dn, length)
+        const u_char *msg, *eomorig, *comp_dn;
+        u_char *exp_dn;
+        int length;
+{
+        register u_char *cp, *dn;
+        register int n, c;
+        u_char *eom;
+        int len = -1, checked = 0;
+
+        dn = exp_dn;
+        cp = (u_char *)comp_dn;
+        eom = exp_dn + length;
+        /*
+         * fetch next label in domain name
+         */
+        while (n = *cp++) {
+                /*
+                 * Check for indirection
+                 */
+                switch (n & INDIR_MASK) {
+                case 0:
+                        if (dn != exp_dn) {
+                                if (dn >= eom)
+                                        return (-1);
+                                *dn++ = '.';
+                        }
+                        if (dn+n >= eom)
+                                return (-1);
+                        checked += n + 1;
+                        while (--n >= 0) {
+                                if ((c = *cp++) == '.') {
+                                        if (dn + n + 2 >= eom)
+                                                return (-1);
+                                        *dn++ = '\\';
+                                }
+                                *dn++ = c;
+                                if (cp >= eomorig)      /* out of range */
+                                        return(-1);
+                        }
+                        break;
+
+                case INDIR_MASK:
+                        if (len < 0)
+                                len = cp - comp_dn + 1;
+                        cp = (u_char *)msg + (((n & 0x3f) << 8) | (*cp & 0xff));
+                        if (cp < msg || cp >= eomorig)  /* out of range */
+                                return(-1);
+                        checked += 2;
+                        /*
+                         * Check for loops in the compressed name;
+                         * if we've looked at the whole message,
+                         * there must be a loop.
+                         */
+                        if (checked >= eomorig - msg)
+                                return (-1);
+                        break;
+
+                default:
+                        return (-1);                    /* flag error */
+                }
+        }
+        *dn = '\0';
+        if (len < 0)
+                len = cp - comp_dn;
+        return (len);
+}
+
+/*
+ * Compress domain name 'exp_dn' into 'comp_dn'.
+ * Return the size of the compressed name or -1.
+ * 'length' is the size of the array pointed to by 'comp_dn'.
+ * 'dnptrs' is a list of pointers to previous compressed names. dnptrs[0]
+ * is a pointer to the beginning of the message. The list ends with NULL.
+ * 'lastdnptr' is a pointer to the end of the arrary pointed to
+ * by 'dnptrs'. Side effect is to update the list of pointers for
+ * labels inserted into the message as we compress the name.
+ * If 'dnptr' is NULL, we don't try to compress names. If 'lastdnptr'
+ * is NULL, we don't update the list.
+ */
+dn_comp(exp_dn, comp_dn, length, dnptrs, lastdnptr)
+        const u_char *exp_dn;
+        u_char *comp_dn, **dnptrs, **lastdnptr;
+        int length;
+{
+        register u_char *cp, *dn;
+        register int c, l;
+        u_char **cpp, **lpp, *sp, *eob;
+        u_char *msg;
+
+        dn = (u_char *)exp_dn;
+        cp = comp_dn;
+        eob = cp + length;
+        if (dnptrs != NULL) {
+                if ((msg = *dnptrs++) != NULL) {
+                        for (cpp = dnptrs; *cpp != NULL; cpp++)
+                                ;
+                        lpp = cpp;      /* end of list to search */
+                }
+        } else
+                msg = NULL;
+        for (c = *dn++; c != '\0'; ) {
+                /* look to see if we can use pointers */
+                if (msg != NULL) {
+                        if ((l = dn_find(dn-1, msg, dnptrs, lpp)) >= 0) {
+                                if (cp+1 >= eob)
+                                        return (-1);
+                                *cp++ = (l >> 8) | INDIR_MASK;
+                                *cp++ = l % 256;
+                                return (cp - comp_dn);
+                        }
+                        /* not found, save it */
+                        if (lastdnptr != NULL && cpp < lastdnptr-1) {
+                                *cpp++ = cp;
+                                *cpp = NULL;
+                        }
+                }
+                sp = cp++;      /* save ptr to length byte */
+                do {
+                        if (c == '.') {
+                                c = *dn++;
+                                break;
+                        }
+                        if (c == '\\') {
+                                if ((c = *dn++) == '\0')
+                                        break;
+                        }
+                        if (cp >= eob) {
+                                if (msg != NULL)
+                                        *lpp = NULL;
+                                return (-1);
+                        }
+                        *cp++ = c;
+                } while ((c = *dn++) != '\0');
+                /* catch trailing '.'s but not '..' */
+                if ((l = cp - sp - 1) == 0 && c == '\0') {
+                        cp--;
+                        break;
+                }
+                if (l <= 0 || l > MAXLABEL) {
+                        if (msg != NULL)
+                                *lpp = NULL;
+                        return (-1);
+                }
+                *sp = l;
+        }
+        if (cp >= eob) {
+                if (msg != NULL)
+                        *lpp = NULL;
+                return (-1);
+        }
+        *cp++ = '\0';
+        return (cp - comp_dn);
+}
+
+/*
+ * Skip over a compressed domain name. Return the size or -1.
+ */
+__dn_skipname(comp_dn, eom)
+        const u_char *comp_dn, *eom;
+{
+        register u_char *cp;
+        register int n;
+
+        cp = (u_char *)comp_dn;
+        while (cp < eom && (n = *cp++)) {
+                /*
+                 * check for indirection
+                 */
+                switch (n & INDIR_MASK) {
+                case 0:                 /* normal case, n == len */
+                        cp += n;
+                        continue;
+                case INDIR_MASK:        /* indirection */
+                        cp++;
+                        break;
+                default:                /* illegal type */
+                        return (-1);
+                }
+                break;
+        }
+        if (cp > eom)
+                return -1;
+        return (cp - comp_dn);
+}
+
+/*
+ * Search for expanded name from a list of previously compressed names.
+ * Return the offset from msg if found or -1.
+ * dnptrs is the pointer to the first name on the list,
+ * not the pointer to the start of the message.
+ */
+static int
+dn_find(exp_dn, msg, dnptrs, lastdnptr)
+        u_char *exp_dn, *msg;
+        u_char **dnptrs, **lastdnptr;
+{
+        register u_char *dn, *cp, **cpp;
+        register int n;
+        u_char *sp;
+
+        for (cpp = dnptrs; cpp < lastdnptr; cpp++) {
+                dn = exp_dn;
+                sp = cp = *cpp;
+                while (n = *cp++) {
+                        /*
+                         * check for indirection
+                         */
+                        switch (n & INDIR_MASK) {
+                        case 0:         /* normal case, n == len */
+                                while (--n >= 0) {
+                                        if (*dn == '.')
+                                                goto next;
+                                        if (*dn == '\\')
+                                                dn++;
+                                        if (*dn++ != *cp++)
+                                                goto next;
+                                }
+                                if ((n = *dn++) == '\0' && *cp == '\0')
+                                        return (sp - msg);
+                                if (n == '.')
+                                        continue;
+                                goto next;
+
+                        default:        /* illegal type */
+                                return (-1);
+
+                        case INDIR_MASK:        /* indirection */
+                                cp = msg + (((n & 0x3f) << 8) | *cp);
+                        }
+                }
+                if (*dn == '\0')
+                        return (sp - msg);
+        next:   ;
+        }
+        return (-1);
+}
+
+/*
+ * Routines to insert/extract short/long's. Must account for byte
+ * order and non-alignment problems. This code at least has the
+ * advantage of being portable.
+ *
+ * used by sendmail.
+ */
+
+u_short
+_getshort(msgp)
+        register u_char *msgp;
+{
+        register u_int16_t u;
+
+        GETSHORT(u, msgp);
+        return (u);
+}
+
+u_int32_t
+_getlong(msgp)
+        register u_char *msgp;
+{
+        register u_int32_t u;
+
+        GETLONG(u, msgp);
+        return (u);
+}
+
+void
+#if defined(__STDC__) || defined(__cplusplus)
+__putshort(register u_int16_t s, register u_char *msgp)
+#else
+__putshort(s, msgp)
+        register u_int16_t s;
+        register u_char *msgp;
+#endif
+{
+        PUTSHORT(s, msgp);
+}
+
+void
+__putlong(l, msgp)
+        register u_int32_t l;
+        register u_char *msgp;
+{
+        PUTLONG(l, msgp);
+}
diff --git a/src/lib/libc/net/res_debug.c b/src/lib/libc/net/res_debug.c
new file mode 100644
index 0000000000..d841293f18
--- /dev/null
+++ b/src/lib/libc/net/res_debug.c
@@ -0,0 +1,749 @@
+/*      $NetBSD: res_debug.c,v 1.7 1995/02/25 06:20:56 cgd Exp $        */
+
+/*-
+ * Copyright (c) 1985, 1990, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_debug.c 8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: res_debug.c,v 1.7 1995/02/25 06:20:56 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include <stdio.h>
+#include <string.h>
+
+void __fp_query();
+char *__p_class(), *__p_time(), *__p_type();
+char *p_cdname(), *p_fqname(), *p_rr();
+static char *p_option __P((u_int32_t));
+
+char *_res_opcodes[] = {
+        "QUERY",
+        "IQUERY",
+        "CQUERYM",
+        "CQUERYU",
+        "4",
+        "5",
+        "6",
+        "7",
+        "8",
+        "UPDATEA",
+        "UPDATED",
+        "UPDATEDA",
+        "UPDATEM",
+        "UPDATEMA",
+        "ZONEINIT",
+        "ZONEREF",
+};
+
+char *_res_resultcodes[] = {
+        "NOERROR",
+        "FORMERR",
+        "SERVFAIL",
+        "NXDOMAIN",
+        "NOTIMP",
+        "REFUSED",
+        "6",
+        "7",
+        "8",
+        "9",
+        "10",
+        "11",
+        "12",
+        "13",
+        "14",
+        "NOCHANGE",
+};
+
+static char retbuf[16];
+
+static char *
+dewks(wks)
+        int wks;
+{
+        switch (wks) {
+        case 5: return("rje");
+        case 7: return("echo");
+        case 9: return("discard");
+        case 11: return("systat");
+        case 13: return("daytime");
+        case 15: return("netstat");
+        case 17: return("qotd");
+        case 19: return("chargen");
+        case 20: return("ftp-data");
+        case 21: return("ftp");
+        case 23: return("telnet");
+        case 25: return("smtp");
+        case 37: return("time");
+        case 39: return("rlp");
+        case 42: return("name");
+        case 43: return("whois");
+        case 53: return("domain");
+        case 57: return("apts");
+        case 59: return("apfs");
+        case 67: return("bootps");
+        case 68: return("bootpc");
+        case 69: return("tftp");
+        case 77: return("rje");
+        case 79: return("finger");
+        case 87: return("link");
+        case 95: return("supdup");
+        case 100: return("newacct");
+        case 101: return("hostnames");
+        case 102: return("iso-tsap");
+        case 103: return("x400");
+        case 104: return("x400-snd");
+        case 105: return("csnet-ns");
+        case 109: return("pop-2");
+        case 111: return("sunrpc");
+        case 113: return("auth");
+        case 115: return("sftp");
+        case 117: return("uucp-path");
+        case 119: return("nntp");
+        case 121: return("erpc");
+        case 123: return("ntp");
+        case 133: return("statsrv");
+        case 136: return("profile");
+        case 144: return("NeWS");
+        case 161: return("snmp");
+        case 162: return("snmp-trap");
+        case 170: return("print-srv");
+        default: (void) sprintf(retbuf, "%d", wks); return(retbuf);
+        }
+}
+
+static char *
+deproto(protonum)
+        int protonum;
+{
+        switch (protonum) {
+        case 1: return("icmp");
+        case 2: return("igmp");
+        case 3: return("ggp");
+        case 5: return("st");
+        case 6: return("tcp");
+        case 7: return("ucl");
+        case 8: return("egp");
+        case 9: return("igp");
+        case 11: return("nvp-II");
+        case 12: return("pup");
+        case 16: return("chaos");
+        case 17: return("udp");
+        default: (void) sprintf(retbuf, "%d", protonum); return(retbuf);
+        }
+}
+
+static char *
+do_rrset(msg, cp, cnt, pflag, file, hs)
+        int cnt, pflag;
+        char *cp,*msg, *hs;
+        FILE *file;
+{
+        int n;
+        int sflag;
+        /*
+         * Print  answer records
+         */
+        sflag = (_res.pfcode & pflag);
+        if (n = ntohs(cnt)) {
+                if ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
+                        fprintf(file, hs);
+                while (--n >= 0) {
+                        cp = p_rr(cp, msg, file);
+                        if ((cp-msg) > PACKETSZ)
+                                return (NULL);
+                }
+                if ((!_res.pfcode) || ((sflag) && (_res.pfcode & RES_PRF_HEAD1)))
+                        putc('\n', file);
+        }
+        return(cp);
+}
+
+__p_query(msg)
+        char *msg;
+{
+        __fp_query(msg, stdout);
+}
+
+/*
+ * Print the current options.
+ * This is intended to be primarily a debugging routine.
+ */
+void
+__fp_resstat(statp, file)
+        struct __res_state *statp;
+        FILE *file;
+{
+        int bit;
+
+        fprintf(file, ";; res options:");
+        if (!statp)
+                statp = &_res;
+        for (bit = 0;  bit < 32;  bit++) {      /* XXX 32 - bad assumption! */
+                if (statp->options & (1<<bit))
+                        fprintf(file, " %s", p_option(1<<bit));
+        }
+        putc('\n', file);
+}
+
+/*
+ * Print the contents of a query.
+ * This is intended to be primarily a debugging routine.
+ */
+void
+__fp_query(msg,file)
+        char *msg;
+        FILE *file;
+{
+        register char *cp;
+        register HEADER *hp;
+        register int n;
+
+        /*
+         * Print header fields.
+         */
+        hp = (HEADER *)msg;
+        cp = msg + sizeof(HEADER);
+        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEADX) || hp->rcode) {
+                fprintf(file,";; ->>HEADER<<- opcode: %s, status: %s, id: %d",
+                        _res_opcodes[hp->opcode],
+                        _res_resultcodes[hp->rcode],
+                        ntohs(hp->id));
+                putc('\n', file);
+        }
+        putc(';', file);
+        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD2)) {
+                fprintf(file,"; flags:");
+                if (hp->qr)
+                        fprintf(file," qr");
+                if (hp->aa)
+                        fprintf(file," aa");
+                if (hp->tc)
+                        fprintf(file," tc");
+                if (hp->rd)
+                        fprintf(file," rd");
+                if (hp->ra)
+                        fprintf(file," ra");
+                if (hp->pr)
+                        fprintf(file," pr");
+        }
+        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_HEAD1)) {
+                fprintf(file,"; Ques: %d", ntohs(hp->qdcount));
+                fprintf(file,", Ans: %d", ntohs(hp->ancount));
+                fprintf(file,", Auth: %d", ntohs(hp->nscount));
+                fprintf(file,", Addit: %d\n", ntohs(hp->arcount));
+        }
+#if 0
+        if (_res.pfcode & (RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1)) {
+                putc('\n',file);
+        }
+#endif
+        /*
+         * Print question records.
+         */
+        if (n = ntohs(hp->qdcount)) {
+                if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
+                        fprintf(file,";; QUESTIONS:\n");
+                while (--n >= 0) {
+                        fprintf(file,";;\t");
+                        cp = p_cdname(cp, msg, file);
+                        if (cp == NULL)
+                                return;
+                        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
+                                fprintf(file, ", type = %s",
+                                        __p_type(_getshort(cp)));
+                        cp += sizeof(u_int16_t);
+                        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_QUES))
+                                fprintf(file, ", class = %s\n\n",
+                                        __p_class(_getshort(cp)));
+                        cp += sizeof(u_int16_t);
+                }
+        }
+        /*
+         * Print authoritative answer records
+         */
+        cp = do_rrset(msg, cp, hp->ancount, RES_PRF_ANS, file,
+                      ";; ANSWERS:\n");
+        if (cp == NULL)
+                return;
+
+        /*
+         * print name server records
+         */
+        cp = do_rrset(msg, cp, hp->nscount, RES_PRF_AUTH, file,
+                      ";; AUTHORITY RECORDS:\n");
+        if (!cp)
+                return;
+
+        /*
+         * print additional records
+         */
+        cp = do_rrset(msg, cp, hp->arcount, RES_PRF_ADD, file,
+                      ";; ADDITIONAL RECORDS:\n");
+        if (!cp)
+                return;
+}
+
+char *
+p_cdname(cp, msg, file)
+        char *cp, *msg;
+        FILE *file;
+{
+        char name[MAXDNAME];
+        int n;
+
+        if ((n = dn_expand((u_char *)msg, (u_char *)cp + MAXCDNAME,
+            (u_char *)cp, (u_char *)name, sizeof(name))) < 0)
+                return (NULL);
+        if (name[0] == '\0')
+                putc('.', file);
+        else
+                fputs(name, file);
+        return (cp + n);
+}
+
+char *
+p_fqname(cp, msg, file)
+        char *cp, *msg;
+        FILE *file;
+{
+        char name[MAXDNAME];
+        int n, len;
+
+        if ((n = dn_expand((u_char *)msg, (u_char *)cp + MAXCDNAME,
+            (u_char *)cp, (u_char *)name, sizeof(name))) < 0)
+                return (NULL);
+        if (name[0] == '\0') {
+                putc('.', file);
+        } else {
+                fputs(name, file);
+                if (name[strlen(name) - 1] != '.')
+                        putc('.', file);
+        }
+        return (cp + n);
+}
+
+/*
+ * Print resource record fields in human readable form.
+ */
+char *
+p_rr(cp, msg, file)
+        char *cp, *msg;
+        FILE *file;
+{
+        int type, class, dlen, n, c;
+        struct in_addr inaddr;
+        char *cp1, *cp2;
+        u_int32_t tmpttl, t;
+        int lcnt;
+
+        if ((cp = p_fqname(cp, msg, file)) == NULL)
+                return (NULL);                  /* compression error */
+        type = _getshort(cp);
+        cp += sizeof(u_int16_t);
+        class = _getshort(cp);
+        cp += sizeof(u_int16_t);
+        tmpttl = _getlong(cp);
+        cp += sizeof(u_int32_t);
+        dlen = _getshort(cp);
+        cp += sizeof(u_int16_t);
+        cp1 = cp;
+        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_TTLID))
+                fprintf(file, "\t%lu", tmpttl);
+        if ((!_res.pfcode) || (_res.pfcode & RES_PRF_CLASS))
+                fprintf(file, "\t%s", __p_class(class));
+        fprintf(file, "\t%s", __p_type(type));
+        /*
+         * Print type specific data, if appropriate
+         */
+        switch (type) {
+        case T_A:
+                switch (class) {
+                case C_IN:
+                case C_HS:
+                        bcopy(cp, (char *)&inaddr, sizeof(inaddr));
+                        if (dlen == 4) {
+                                fprintf(file,"\t%s", inet_ntoa(inaddr));
+                                cp += dlen;
+                        } else if (dlen == 7) {
+                                char *address;
+                                u_char protocol;
+                                u_short port;
+
+                                address = inet_ntoa(inaddr);
+                                cp += sizeof(inaddr);
+                                protocol = *(u_char*)cp;
+                                cp += sizeof(u_char);
+                                port = _getshort(cp);
+                                cp += sizeof(u_int16_t);
+                                fprintf(file, "\t%s\t; proto %d, port %d",
+                                        address, protocol, port);
+                        }
+                        break;
+                default:
+                        cp += dlen;
+                }
+                break;
+        case T_CNAME:
+        case T_MB:
+        case T_MG:
+        case T_MR:
+        case T_NS:
+        case T_PTR:
+                putc('\t', file);
+                cp = p_fqname(cp, msg, file);
+                break;
+
+        case T_HINFO:
+                if (n = *cp++) {
+                        fprintf(file,"\t%.*s", n, cp);
+                        cp += n;
+                }
+                if (n = *cp++) {
+                        fprintf(file,"\t%.*s", n, cp);
+                        cp += n;
+                }
+                break;
+
+        case T_SOA:
+                putc('\t', file);
+                cp = p_fqname(cp, msg, file);   /* origin */
+                putc(' ', file);
+                cp = p_fqname(cp, msg, file);   /* mail addr */
+                fputs(" (\n", file);
+                t = _getlong(cp);  cp += sizeof(u_int32_t);
+                fprintf(file,"\t\t\t%lu\t; serial\n", t);
+                t = _getlong(cp);  cp += sizeof(u_int32_t);
+                fprintf(file,"\t\t\t%lu\t; refresh (%s)\n", t, __p_time(t));
+                t = _getlong(cp);  cp += sizeof(u_int32_t);
+                fprintf(file,"\t\t\t%lu\t; retry (%s)\n", t, __p_time(t));
+                t = _getlong(cp);  cp += sizeof(u_int32_t);
+                fprintf(file,"\t\t\t%lu\t; expire (%s)\n", t, __p_time(t));
+                t = _getlong(cp);  cp += sizeof(u_int32_t);
+                fprintf(file,"\t\t\t%lu )\t; minimum (%s)", t, __p_time(t));
+                break;
+
+        case T_MX:
+        case T_AFSDB:
+                fprintf(file,"\t%d ", _getshort(cp));
+                cp += sizeof(u_int16_t);
+                cp = p_fqname(cp, msg, file);
+                break;
+
+        case T_TXT:
+                (void) fputs("\t\"", file);
+                cp2 = cp1 + dlen;
+                while (cp < cp2) {
+                        if (n = (unsigned char) *cp++) {
+                                for (c = n; c > 0 && cp < cp2; c--)
+                                        if (*cp == '\n') {
+                                            (void) putc('\\', file);
+                                            (void) putc(*cp++, file);
+                                        } else
+                                            (void) putc(*cp++, file);
+                        }
+                }
+                putc('"', file);
+                break;
+
+        case T_MINFO:
+        case T_RP:
+                putc('\t', file);
+                cp = p_fqname(cp, msg, file);
+                putc(' ', file);
+                cp = p_fqname(cp, msg, file);
+                break;
+
+        case T_UINFO:
+                putc('\t', file);
+                fputs(cp, file);
+                cp += dlen;
+                break;
+
+        case T_UID:
+        case T_GID:
+                if (dlen == 4) {
+                        fprintf(file,"\t%u", _getlong(cp));
+                        cp += sizeof(int32_t);
+                }
+                break;
+
+        case T_WKS:
+                if (dlen < sizeof(u_int32_t) + 1)
+                        break;
+                bcopy(cp, (char *)&inaddr, sizeof(inaddr));
+                cp += sizeof(u_int32_t);
+                fprintf(file, "\t%s %s ( ",
+                        inet_ntoa(inaddr),
+                        deproto((int) *cp));
+                cp += sizeof(u_char);
+                n = 0;
+                lcnt = 0;
+                while (cp < cp1 + dlen) {
+                        c = *cp++;
+                        do {
+                                if (c & 0200) {
+                                        if (lcnt == 0) {
+                                                fputs("\n\t\t\t", file);
+                                                lcnt = 5;
+                                        }
+                                        fputs(dewks(n), file);
+                                        putc(' ', file);
+                                        lcnt--;
+                                }
+                                c <<= 1;
+                        } while (++n & 07);
+                }
+                putc(')', file);
+                break;
+
+#ifdef ALLOW_T_UNSPEC
+        case T_UNSPEC:
+                {
+                        int NumBytes = 8;
+                        char *DataPtr;
+                        int i;
+
+                        if (dlen < NumBytes) NumBytes = dlen;
+                        fprintf(file, "\tFirst %d bytes of hex data:",
+                                NumBytes);
+                        for (i = 0, DataPtr = cp; i < NumBytes; i++, DataPtr++)
+                                fprintf(file, " %x", *DataPtr);
+                        cp += dlen;
+                }
+                break;
+#endif /* ALLOW_T_UNSPEC */
+
+        default:
+                fprintf(file,"\t?%d?", type);
+                cp += dlen;
+        }
+#if 0
+        fprintf(file, "\t; dlen=%d, ttl %s\n", dlen, __p_time(tmpttl));
+#else
+        putc('\n', file);
+#endif
+        if (cp - cp1 != dlen) {
+                fprintf(file,";; packet size error (found %d, dlen was %d)\n",
+                        cp - cp1, dlen);
+                cp = NULL;
+        }
+        return (cp);
+}
+
+static  char nbuf[40];
+
+/*
+ * Return a string for the type
+ */
+char *
+__p_type(type)
+        int type;
+{
+        switch (type) {
+        case T_A:
+                return("A");
+        case T_NS:              /* authoritative server */
+                return("NS");
+        case T_CNAME:           /* canonical name */
+                return("CNAME");
+        case T_SOA:             /* start of authority zone */
+                return("SOA");
+        case T_MB:              /* mailbox domain name */
+                return("MB");
+        case T_MG:              /* mail group member */
+                return("MG");
+        case T_MR:              /* mail rename name */
+                return("MR");
+        case T_NULL:            /* null resource record */
+                return("NULL");
+        case T_WKS:             /* well known service */
+                return("WKS");
+        case T_PTR:             /* domain name pointer */
+                return("PTR");
+        case T_HINFO:           /* host information */
+                return("HINFO");
+        case T_MINFO:           /* mailbox information */
+                return("MINFO");
+        case T_MX:              /* mail routing info */
+                return("MX");
+        case T_TXT:             /* text */
+                return("TXT");
+        case T_RP:              /* responsible person */
+                return("RP");
+        case T_AFSDB:           /* AFS cell database */
+                return("AFSDB");
+        case T_AXFR:            /* zone transfer */
+                return("AXFR");
+        case T_MAILB:           /* mail box */
+                return("MAILB");
+        case T_MAILA:           /* mail address */
+                return("MAILA");
+        case T_ANY:             /* matches any type */
+                return("ANY");
+        case T_UINFO:
+                return("UINFO");
+        case T_UID:
+                return("UID");
+        case T_GID:
+                return("GID");
+#ifdef ALLOW_T_UNSPEC
+        case T_UNSPEC:
+                return("UNSPEC");
+#endif /* ALLOW_T_UNSPEC */
+
+        default:
+                (void)sprintf(nbuf, "%d", type);
+                return(nbuf);
+        }
+}
+
+/*
+ * Return a mnemonic for class
+ */
+char *
+__p_class(class)
+        int class;
+{
+
+        switch (class) {
+        case C_IN:              /* internet class */
+                return("IN");
+        case C_HS:              /* hesiod class */
+                return("HS");
+        case C_ANY:             /* matches any class */
+                return("ANY");
+        default:
+                (void)sprintf(nbuf, "%d", class);
+                return(nbuf);
+        }
+}
+
+/*
+ * Return a mnemonic for an option
+ */
+static char *
+p_option(option)
+        u_int32_t option;
+{
+        switch (option) {
+        case RES_INIT:          return "init";
+        case RES_DEBUG:         return "debug";
+        case RES_AAONLY:        return "aaonly";
+        case RES_USEVC:         return "usevc";
+        case RES_PRIMARY:       return "primry";
+        case RES_IGNTC:         return "igntc";
+        case RES_RECURSE:       return "recurs";
+        case RES_DEFNAMES:      return "defnam";
+        case RES_STAYOPEN:      return "styopn";
+        case RES_DNSRCH:        return "dnsrch";
+        default:                sprintf(nbuf, "?0x%x?", option); return nbuf;
+        }
+}
+
+/*
+ * Return a mnemonic for a time to live
+ */
+char *
+__p_time(value)
+        u_int32_t value;
+{
+        int secs, mins, hours, days;
+        register char *p;
+
+        if (value == 0) {
+                strcpy(nbuf, "0 secs");
+                return(nbuf);
+        }
+
+        secs = value % 60;
+        value /= 60;
+        mins = value % 60;
+        value /= 60;
+        hours = value % 24;
+        value /= 24;
+        days = value;
+        value = 0;
+
+#define PLURALIZE(x)    x, (x == 1) ? "" : "s"
+        p = nbuf;
+        if (days) {
+                (void)sprintf(p, "%d day%s", PLURALIZE(days));
+                while (*++p);
+        }
+        if (hours) {
+                if (days)
+                        *p++ = ' ';
+                (void)sprintf(p, "%d hour%s", PLURALIZE(hours));
+                while (*++p);
+        }
+        if (mins) {
+                if (days || hours)
+                        *p++ = ' ';
+                (void)sprintf(p, "%d min%s", PLURALIZE(mins));
+                while (*++p);
+        }
+        if (secs || ! (days || hours || mins)) {
+                if (days || hours || mins)
+                        *p++ = ' ';
+                (void)sprintf(p, "%d sec%s", PLURALIZE(secs));
+        }
+        return(nbuf);
+}
diff --git a/src/lib/libc/net/res_init.c b/src/lib/libc/net/res_init.c
new file mode 100644
index 0000000000..33cc8d39f1
--- /dev/null
+++ b/src/lib/libc/net/res_init.c
@@ -0,0 +1,394 @@
+/*      $NetBSD: res_init.c,v 1.8 1995/06/03 22:33:36 mycroft Exp $     */
+
+/*-
+ * Copyright (c) 1985, 1989, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_init.c  8.1 (Berkeley) 6/7/93";
+static char rcsid[] = "$Id: res_init.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel ";
+#else
+static char rcsid[] = "$NetBSD: res_init.c,v 1.8 1995/06/03 22:33:36 mycroft Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void res_setoptions __P((char *, char *));
+static u_int32_t net_mask __P((struct in_addr));
+
+/*
+ * Resolver state default settings
+ */
+
+struct __res_state _res = {
+        RES_TIMEOUT,                    /* retransmition time interval */
+        4,                              /* number of times to retransmit */
+        RES_DEFAULT,                    /* options flags */
+        1,                              /* number of name servers */
+};
+
+/*
+ * Set up default settings.  If the configuration file exist, the values
+ * there will have precedence.  Otherwise, the server address is set to
+ * INADDR_ANY and the default domain name comes from the gethostname().
+ *
+ * The configuration file should only be used if you want to redefine your
+ * domain or run without a server on your machine.
+ *
+ * Return 0 if completes successfully, -1 on error
+ */
+res_init()
+{
+        register FILE *fp;
+        register char *cp, **pp, *net;
+        register int n;
+        char buf[BUFSIZ], buf2[BUFSIZ];
+        int nserv = 0;    /* number of nameserver records read from file */
+        int haveenv = 0;
+        int havesearch = 0;
+        int nsort = 0;
+        u_long mask;
+
+        _res.nsaddr.sin_len = sizeof(struct sockaddr_in);
+        _res.nsaddr.sin_family = AF_INET;
+        _res.nsaddr.sin_port = htons(NAMESERVER_PORT);
+#ifdef USELOOPBACK
+        _res.nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1);
+#else
+        _res.nsaddr.sin_addr.s_addr = INADDR_ANY;
+#endif
+        _res.nscount = 1;
+        _res.ndots = 1;
+        _res.pfcode = 0;
+        strncpy(_res.lookups, "f", sizeof _res.lookups);
+
+        /* Allow user to override the local domain definition */
+        if ((cp = getenv("LOCALDOMAIN")) != NULL) {
+                (void)strncpy(_res.defdname, cp, sizeof(_res.defdname) - 1);
+                if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
+                        *cp = '\0';
+                haveenv++;
+
+                /*
+                 * Set search list to be blank-separated strings
+                 * from rest of env value.  Permits users of LOCALDOMAIN
+                 * to still have a search list, and anyone to set the
+                 * one that they want to use as an individual (even more
+                 * important now that the rfc1535 stuff restricts searches)
+                 */
+                cp = _res.defdname;
+                pp = _res.dnsrch;
+                *pp++ = cp;
+                for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
+                        if (*cp == '\n')        /* silly backwards compat */
+                                break;
+                        else if (*cp == ' ' || *cp == '\t') {
+                                *cp = 0;
+                                n = 1;
+                        } else if (n) {
+                                *pp++ = cp;
+                                n = 0;
+                                havesearch = 1;
+                        }
+                }
+                /* null terminate last domain if there are excess */
+                while (*cp != '\0' && *cp != ' ' && *cp != '\t' && *cp != '\n')
+                        cp++;
+                *cp = '\0';
+                *pp++ = 0;
+        }
+
+        if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
+            strncpy(_res.lookups, "bf", sizeof _res.lookups);
+
+            /* read the config file */
+            while (fgets(buf, sizeof(buf), fp) != NULL) {
+                /* skip comments */
+                if ((*buf == ';') || (*buf == '#'))
+                        continue;
+                /* read default domain name */
+                if (!strncmp(buf, "domain", sizeof("domain") - 1)) {
+                    if (haveenv)        /* skip if have from environ */
+                            continue;
+                    cp = buf + sizeof("domain") - 1;
+                    while (*cp == ' ' || *cp == '\t')
+                            cp++;
+                    if ((*cp == '\0') || (*cp == '\n'))
+                            continue;
+                    (void)strncpy(_res.defdname, cp,
+                                  sizeof(_res.defdname) - 1);
+                    if ((cp = strpbrk(_res.defdname, " \t\n")) != NULL)
+                            *cp = '\0';
+                    havesearch = 0;
+                    continue;
+                }
+                /* lookup types */
+                if (!strncmp(buf, "lookup", sizeof("lookup") -1)) {
+                    char *sp = NULL;
+
+                    bzero(_res.lookups, sizeof _res.lookups);
+                    cp = buf + sizeof("lookup") - 1;
+                    for (n = 0;; cp++) {
+                            if (n == MAXDNSLUS)
+                                    break;
+                            if ((*cp == '\0') || (*cp == '\n')) {
+                                    if (sp) {
+                                            if (*sp=='y' || *sp=='b' || *sp=='f')
+                                                    _res.lookups[n++] = *sp;
+                                            sp = NULL;
+                                    }
+                                    break;
+                            } else if ((*cp == ' ') || (*cp == '\t') || (*cp == ',')) {
+                                    if (sp) {
+                                            if (*sp=='y' || *sp=='b' || *sp=='f')
+                                                    _res.lookups[n++] = *sp;
+                                            sp = NULL;
+                                    }
+                            } else if (sp == NULL)
+                                    sp = cp;
+                    }
+                    continue;
+                }
+                /* set search list */
+                if (!strncmp(buf, "search", sizeof("search") - 1)) {
+                    if (haveenv)        /* skip if have from environ */
+                            continue;
+                    cp = buf + sizeof("search") - 1;
+                    while (*cp == ' ' || *cp == '\t')
+                            cp++;
+                    if ((*cp == '\0') || (*cp == '\n'))
+                            continue;
+                    (void)strncpy(_res.defdname, cp,
+                                  sizeof(_res.defdname) - 1);
+                    if ((cp = strchr(_res.defdname, '\n')) != NULL)
+                            *cp = '\0';
+                    /*
+                     * Set search list to be blank-separated strings
+                     * on rest of line.
+                     */
+                    cp = _res.defdname;
+                    pp = _res.dnsrch;
+                    *pp++ = cp;
+                    for (n = 0; *cp && pp < _res.dnsrch + MAXDNSRCH; cp++) {
+                            if (*cp == ' ' || *cp == '\t') {
+                                    *cp = 0;
+                                    n = 1;
+                            } else if (n) {
+                                    *pp++ = cp;
+                                    n = 0;
+                            }
+                    }
+                    /* null terminate last domain if there are excess */
+                    while (*cp != '\0' && *cp != ' ' && *cp != '\t')
+                            cp++;
+                    *cp = '\0';
+                    *pp++ = 0;
+                    havesearch = 1;
+                    continue;
+                }
+                /* read nameservers to query */
+                if (!strncmp(buf, "nameserver", sizeof("nameserver") - 1) &&
+                   nserv < MAXNS) {
+                   struct in_addr a;
+
+                    cp = buf + sizeof("nameserver") - 1;
+                    while (*cp == ' ' || *cp == '\t')
+                        cp++;
+                    if ((*cp != '\0') && (*cp != '\n') && inet_aton(cp, &a)) {
+                        _res.nsaddr_list[nserv].sin_len = sizeof(struct sockaddr_in);
+                        _res.nsaddr_list[nserv].sin_family = AF_INET;
+                        _res.nsaddr_list[nserv].sin_port =
+                                htons(NAMESERVER_PORT);
+                        _res.nsaddr_list[nserv].sin_addr = a;
+                        nserv++;
+                    }
+                    continue;
+                }
+                if (!strncmp(buf, "sortlist", sizeof("sortlist") - 1)) {
+                    struct in_addr a;
+
+                    cp = buf + sizeof("sortlist") - 1;
+                    while (*cp == ' ' || *cp == '\t')
+                        cp++;
+                    while (sscanf(cp,"%[0-9./]s", buf2) && nsort < MAXRESOLVSORT) {
+                        if (net = strchr(buf2, '/'))
+                            *net = '\0';
+                        if (inet_aton(buf2, &a)) {
+                            _res.sort_list[nsort].addr = a;
+                            if (net && inet_aton(net+1, &a)) {
+                                _res.sort_list[nsort].mask = a.s_addr;
+                            } else {
+                                _res.sort_list[nsort].mask =
+                                        net_mask(_res.sort_list[nsort].addr);
+                            }
+                            nsort++;
+                        }
+                        if (net)
+                                *net = '/';
+                        cp += strlen(buf2);
+                        while (*cp == ' ' || *cp == '\t')
+                            cp++;
+                    }
+                    continue;
+                }
+                if (!strncmp(buf, "options", sizeof("options") -1)) {
+                    res_setoptions(buf + sizeof("options") - 1, "conf");
+                    continue;
+                }
+            }
+            if (nserv > 1) 
+                _res.nscount = nserv;
+            _res.nsort = nsort;
+            (void) fclose(fp);
+        }
+        if (_res.defdname[0] == 0) {
+                if (gethostname(buf, sizeof(_res.defdname) - 1) == 0 &&
+                   (cp = strchr(buf, '.')))
+                        (void)strcpy(_res.defdname, cp + 1);
+        }
+
+        /* find components of local domain that might be searched */
+        if (havesearch == 0) {
+                pp = _res.dnsrch;
+                *pp++ = _res.defdname;
+#ifndef SEARCH_LOCAL_DOMAINS
+                *pp = NULL;
+#else
+                for (cp = _res.defdname, n = 0; *cp; cp++)
+                        if (*cp == '.')
+                                n++;
+                cp = _res.defdname;
+                for (; n >= LOCALDOMAINPARTS && pp < _res.dnsrch + MAXDFLSRCH;
+                    n--) {
+                        cp = strchr(cp, '.');
+                        *pp++ = ++cp;
+                }
+                *pp++ = 0;
+#endif
+        }
+
+        if ((cp = getenv("RES_OPTIONS")) != NULL)
+                res_setoptions(cp, "env");
+        _res.options |= RES_INIT;
+        return (0);
+}
+
+static void
+res_setoptions(options, source)
+        char *options, *source;
+{
+        char *cp = options;
+        int i;
+
+#ifdef DEBUG
+        if (_res.options & RES_DEBUG) {
+                printf(";; res_setoptions(\"%s\", \"%s\")...\n",
+                       options, source);
+        }
+#endif
+        while (*cp) {
+                /* skip leading and inner runs of spaces */
+                while (*cp == ' ' || *cp == '\t')
+                        cp++;
+                /* search for and process individual options */
+                if (!strncmp(cp, "ndots:", sizeof("ndots:")-1)) {
+                        i = atoi(cp + sizeof("ndots:") - 1);
+                        if (i <= RES_MAXNDOTS)
+                                _res.ndots = i;
+                        else
+                                _res.ndots = RES_MAXNDOTS;
+#ifdef DEBUG
+                        if (_res.options & RES_DEBUG) {
+                                printf(";;\tndots=%d\n", _res.ndots);
+                        }
+#endif
+                } else if (!strncmp(cp, "debug", sizeof("debug")-1)) {
+#ifdef DEBUG
+                        if (!(_res.options & RES_DEBUG)) {
+                                printf(";; res_setoptions(\"%s\", \"%s\")..\n",
+                                       options, source);
+                                _res.options |= RES_DEBUG;
+                        }
+                        printf(";;\tdebug\n");
+#endif
+                } else {
+                        /* XXX - print a warning here? */
+                }
+                /* skip to next run of spaces */
+                while (*cp && *cp != ' ' && *cp != '\t')
+                        cp++;
+        }
+}
+
+static u_int32_t
+net_mask(in)            /* XXX - should really use system's version of this */
+        struct in_addr in;
+{
+        register u_int32_t i = ntohl(in.s_addr);
+
+        if (IN_CLASSA(i))
+                return (htonl(IN_CLASSA_NET));
+        if (IN_CLASSB(i))
+                return (htonl(IN_CLASSB_NET));
+        return (htonl(IN_CLASSC_NET));
+}
diff --git a/src/lib/libc/net/res_mkquery.c b/src/lib/libc/net/res_mkquery.c
new file mode 100644
index 0000000000..25f025e147
--- /dev/null
+++ b/src/lib/libc/net/res_mkquery.c
@@ -0,0 +1,236 @@
+/*      $NetBSD: res_mkquery.c,v 1.5 1995/02/25 06:20:58 cgd Exp $      */
+
+/*-
+ * Copyright (c) 1985, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_mkquery.c       8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$Id: res_mkquery.c,v 4.9.1.2 1993/05/17 10:00:01 vixie Exp ";
+#else
+static char rcsid[] = "$NetBSD: res_mkquery.c,v 1.5 1995/02/25 06:20:58 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+#include <stdio.h>
+#include <string.h>
+
+/*
+ * Form all types of queries.
+ * Returns the size of the result or -1.
+ */
+res_mkquery(op, dname, class, type, data, datalen, newrr_in, buf, buflen)
+        int op;                 /* opcode of query */
+        const char *dname;              /* domain name */
+        int class, type;        /* class and type of query */
+        const char *data;               /* resource record data */
+        int datalen;            /* length of data */
+        const char *newrr_in;   /* new rr for modify or append */
+        char *buf;              /* buffer to put query */
+        int buflen;             /* size of buffer */
+{
+        register HEADER *hp;
+        register char *cp;
+        register int n;
+        struct rrec *newrr = (struct rrec *) newrr_in;
+        char *dnptrs[10], **dpp, **lastdnptr;
+
+#ifdef DEBUG
+        if (_res.options & RES_DEBUG)
+                printf(";; res_mkquery(%d, %s, %d, %d)\n",
+                       op, dname, class, type);
+#endif
+        /*
+         * Initialize header fields.
+         */
+        if ((buf == NULL) || (buflen < sizeof(HEADER)))
+                return(-1);
+        bzero(buf, sizeof(HEADER));
+        hp = (HEADER *) buf;
+        hp->id = htons(++_res.id);
+        hp->opcode = op;
+        hp->pr = (_res.options & RES_PRIMARY) != 0;
+        hp->rd = (_res.options & RES_RECURSE) != 0;
+        hp->rcode = NOERROR;
+        cp = buf + sizeof(HEADER);
+        buflen -= sizeof(HEADER);
+        dpp = dnptrs;
+        *dpp++ = buf;
+        *dpp++ = NULL;
+        lastdnptr = dnptrs + sizeof(dnptrs)/sizeof(dnptrs[0]);
+        /*
+         * perform opcode specific processing
+         */
+        switch (op) {
+        case QUERY:
+                if ((buflen -= QFIXEDSZ) < 0)
+                        return(-1);
+                if ((n = dn_comp((u_char *)dname, (u_char *)cp, buflen,
+                    (u_char **)dnptrs, (u_char **)lastdnptr)) < 0)
+                        return (-1);
+                cp += n;
+                buflen -= n;
+                __putshort(type, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                __putshort(class, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                hp->qdcount = htons(1);
+                if (op == QUERY || data == NULL)
+                        break;
+                /*
+                 * Make an additional record for completion domain.
+                 */
+                buflen -= RRFIXEDSZ;
+                if ((n = dn_comp((u_char *)data, (u_char *)cp, buflen,
+                    (u_char **)dnptrs, (u_char **)lastdnptr)) < 0)
+                        return (-1);
+                cp += n;
+                buflen -= n;
+                __putshort(T_NULL, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                __putshort(class, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                __putlong(0, (u_char *)cp);
+                cp += sizeof(u_int32_t);
+                __putshort(0, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                hp->arcount = htons(1);
+                break;
+
+        case IQUERY:
+                /*
+                 * Initialize answer section
+                 */
+                if (buflen < 1 + RRFIXEDSZ + datalen)
+                        return (-1);
+                *cp++ = '\0';   /* no domain name */
+                __putshort(type, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                __putshort(class, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                __putlong(0, (u_char *)cp);
+                cp += sizeof(u_int32_t);
+                __putshort(datalen, (u_char *)cp);
+                cp += sizeof(u_int16_t);
+                if (datalen) {
+                        bcopy(data, cp, datalen);
+                        cp += datalen;
+                }
+                hp->ancount = htons(1);
+                break;
+
+#ifdef ALLOW_UPDATES
+        /*
+         * For UPDATEM/UPDATEMA, do UPDATED/UPDATEDA followed by UPDATEA
+         * (Record to be modified is followed by its replacement in msg.)
+         */
+        case UPDATEM:
+        case UPDATEMA:
+
+        case UPDATED:
+                /*
+                 * The res code for UPDATED and UPDATEDA is the same; user
+                 * calls them differently: specifies data for UPDATED; server
+                 * ignores data if specified for UPDATEDA.
+                 */
+        case UPDATEDA:
+                buflen -= RRFIXEDSZ + datalen;
+                if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
+                        return (-1);
+                cp += n;
+                __putshort(type, cp);
+                cp += sizeof(u_int16_t);
+                __putshort(class, cp);
+                cp += sizeof(u_int16_t);
+                __putlong(0, cp);
+                cp += sizeof(u_int32_t);
+                __putshort(datalen, cp);
+                cp += sizeof(u_int16_t);
+                if (datalen) {
+                        bcopy(data, cp, datalen);
+                        cp += datalen;
+                }
+                if ( (op == UPDATED) || (op == UPDATEDA) ) {
+                        hp->ancount = htons(0);
+                        break;
+                }
+                /* Else UPDATEM/UPDATEMA, so drop into code for UPDATEA */
+
+        case UPDATEA:   /* Add new resource record */
+                buflen -= RRFIXEDSZ + datalen;
+                if ((n = dn_comp(dname, cp, buflen, dnptrs, lastdnptr)) < 0)
+                        return (-1);
+                cp += n;
+                __putshort(newrr->r_type, cp);
+                cp += sizeof(u_int16_t);
+                __putshort(newrr->r_class, cp);
+                cp += sizeof(u_int16_t);
+                __putlong(0, cp);
+                cp += sizeof(u_int32_t);
+                __putshort(newrr->r_size, cp);
+                cp += sizeof(u_int16_t);
+                if (newrr->r_size) {
+                        bcopy(newrr->r_data, cp, newrr->r_size);
+                        cp += newrr->r_size;
+                }
+                hp->ancount = htons(0);
+                break;
+
+#endif /* ALLOW_UPDATES */
+        }
+        return (cp - buf);
+}
diff --git a/src/lib/libc/net/res_query.c b/src/lib/libc/net/res_query.c
new file mode 100644
index 0000000000..7649462e56
--- /dev/null
+++ b/src/lib/libc/net/res_query.c
@@ -0,0 +1,366 @@
+/*      $NetBSD: res_query.c,v 1.9 1995/02/25 06:58:58 cgd Exp $        */
+
+/*-
+ * Copyright (c) 1988, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_query.c 8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$Id: res_query.c,v 1.1 1993/06/01 09:42:14 vixie Exp vixie ";
+#else
+static char rcsid[] = "$NetBSD: res_query.c,v 1.9 1995/02/25 06:58:58 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <netdb.h>
+#include <resolv.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if PACKETSZ > 1024
+#define MAXPACKET       PACKETSZ
+#else
+#define MAXPACKET       1024
+#endif
+
+char *__hostalias __P((const char *));
+int h_errno;
+
+/*
+ * Formulate a normal query, send, and await answer.
+ * Returned answer is placed in supplied buffer "answer".
+ * Perform preliminary check of answer, returning success only
+ * if no error is indicated and the answer count is nonzero.
+ * Return the size of the response on success, -1 on error.
+ * Error number is left in h_errno.
+ * Caller must parse answer and determine whether it answers the question.
+ */
+res_query(name, class, type, answer, anslen)
+        char *name;             /* domain name */
+        int class, type;        /* class and type of query */
+        u_char *answer;         /* buffer to put answer */
+        int anslen;             /* size of answer buffer */
+{
+        char buf[MAXPACKET];
+        HEADER *hp;
+        int n;
+
+        if ((_res.options & RES_INIT) == 0 && res_init() == -1)
+                return (-1);
+#ifdef DEBUG
+        if (_res.options & RES_DEBUG)
+                printf(";; res_query(%s, %d, %d)\n", name, class, type);
+#endif
+        n = res_mkquery(QUERY, name, class, type, (char *)NULL, 0, NULL,
+            buf, sizeof(buf));
+
+        if (n <= 0) {
+#ifdef DEBUG
+                if (_res.options & RES_DEBUG)
+                        printf(";; res_query: mkquery failed\n");
+#endif
+                h_errno = NO_RECOVERY;
+                return (n);
+        }
+        n = res_send(buf, n, (char *)answer, anslen);
+        if (n < 0) {
+#ifdef DEBUG
+                if (_res.options & RES_DEBUG)
+                        printf(";; res_query: send error\n");
+#endif
+                h_errno = TRY_AGAIN;
+                return (n);
+        }
+
+        hp = (HEADER *) answer;
+        if (hp->rcode != NOERROR || ntohs(hp->ancount) == 0) {
+#ifdef DEBUG
+                if (_res.options & RES_DEBUG)
+                        printf(";; rcode = %d, ancount=%d\n", hp->rcode,
+                            ntohs(hp->ancount));
+#endif
+                switch (hp->rcode) {
+                        case NXDOMAIN:
+                                h_errno = HOST_NOT_FOUND;
+                                break;
+                        case SERVFAIL:
+                                h_errno = TRY_AGAIN;
+                                break;
+                        case NOERROR:
+                                h_errno = NO_DATA;
+                                break;
+                        case FORMERR:
+                        case NOTIMP:
+                        case REFUSED:
+                        default:
+                                h_errno = NO_RECOVERY;
+                                break;
+                }
+                return (-1);
+        }
+        return (n);
+}
+
+/*
+ * Formulate a normal query, send, and retrieve answer in supplied buffer.
+ * Return the size of the response on success, -1 on error.
+ * If enabled, implement search rules until answer or unrecoverable failure
+ * is detected.  Error number is left in h_errno.
+ * Only useful for queries in the same name hierarchy as the local host
+ * (not, for example, for host address-to-name lookups in domain in-addr.arpa).
+ */
+int
+res_search(name, class, type, answer, anslen)
+        const char *name;       /* domain name */
+        int class, type;        /* class and type of query */
+        u_char *answer;         /* buffer to put answer */
+        int anslen;             /* size of answer */
+{
+        register char *cp, **domain;
+        int dots, trailing_dot, ret, got_nodata, saved_herrno, tried_as_is;
+
+        if ((_res.options & RES_INIT) == 0 && res_init() == -1)
+                return (-1);
+
+        got_nodata = 0;
+        errno = 0;
+        h_errno = HOST_NOT_FOUND;       /* default, if we never query */
+        dots = 0;
+        for (cp = (char *)name; *cp; cp++) {
+                if (*cp == '.')
+                        dots++;
+        }
+        trailing_dot = 0;
+        if ((cp > name) && (*--cp == '.'))
+                trailing_dot++;
+
+        /*
+         * if there aren't any dots, it could be a user-level alias
+         */
+        if (!dots && (cp = __hostalias(name)))
+                return (res_query(cp, class, type, answer, anslen));
+
+        /*
+         * If there are dots in the name already, let's just give it a try
+         * 'as is'.  The threshold can be set with the "ndots" option.
+         */
+        saved_herrno = -1;
+        tried_as_is = 0;
+        if (dots >= _res.ndots) {
+                ret = res_querydomain(name, NULL, class, type, answer, anslen);
+                if (ret > 0)
+                        return (ret);
+                saved_herrno = h_errno;
+                tried_as_is++;
+        }
+
+        /*
+         * We do at least one level of search if
+         *      - there is no dot and RES_DEFNAME is set, or
+         *      - there is at least one dot, there is no trailing dot,
+         *        and RES_DNSRCH is set.
+         */
+        if ((!dots && (_res.options & RES_DEFNAMES)) ||
+            (dots && !trailing_dot && (_res.options & RES_DNSRCH))) {
+                for (domain = _res.dnsrch; *domain; domain++) {
+                        int done = 0;
+
+                        ret = res_querydomain(name, *domain, class, type,
+                            answer, anslen);
+                        if (ret > 0)
+                                return (ret);
+                        /*
+                         * If no server present, give up.
+                         * If name isn't found in this domain,
+                         * keep trying higher domains in the search list
+                         * (if that's enabled).
+                         * On a NO_DATA error, keep trying, otherwise
+                         * a wildcard entry of another type could keep us
+                         * from finding this entry higher in the domain.
+                         * If we get some other error (negative answer or
+                         * server failure), then stop searching up,
+                         * but try the input name below in case it's
+                         * fully-qualified.
+                         */
+                        if (errno == ECONNREFUSED) {
+                                h_errno = TRY_AGAIN;
+                                return (-1);
+                        }
+
+                        switch (h_errno) {
+                        case NO_DATA:
+                                got_nodata++;
+                                /* FALLTHROUGH */
+                        case HOST_NOT_FOUND:
+                                /* keep trying */
+                                break;
+                        default:
+                                /* anything else implies that we're done */
+                                done++;
+                        }
+                        /*
+                         * if we got here for some reason other than DNSRCH,
+                         * we only wanted one iteration of the loop, so stop.
+                         */
+                        if (!(_res.options & RES_DNSRCH))
+                                done++;
+
+                        if (done)
+                                break;
+                }
+        }
+
+        /*
+         * if we have not already tried the name "as is", do that now.
+         * note that we do this regardless of how many dots were in the
+         * name or whether it ends with a dot.
+         */
+        if (!tried_as_is) {
+                ret = res_querydomain(name, NULL, class, type, answer, anslen);
+                if (ret > 0)
+                        return (ret);
+                saved_herrno = h_errno;
+        }
+
+        /*
+         * if we got here, we didn't satisfy the search.
+         * if we did an initial full query, return that query's h_errno
+         * (note that we wouldn't be here if that query had succeeded).
+         * else if we ever got a nodata, send that back as the reason.
+         * else send back meaningless h_errno, that being the one from
+         * the last DNSRCH we did.
+         */
+        if (saved_herrno != -1)
+                h_errno = saved_herrno;
+        else if (got_nodata)
+                h_errno = NO_DATA;
+        return (-1);
+}
+
+/*
+ * Perform a call on res_query on the concatenation of name and domain,
+ * removing a trailing dot from name if domain is NULL.
+ */
+res_querydomain(name, domain, class, type, answer, anslen)
+        char *name, *domain;
+        int class, type;        /* class and type of query */
+        u_char *answer;         /* buffer to put answer */
+        int anslen;             /* size of answer */
+{
+        char nbuf[2*MAXDNAME+2];
+        char *longname = nbuf;
+        int n;
+
+#ifdef DEBUG
+        if (_res.options & RES_DEBUG)
+                printf(";; res_querydomain(%s, %s, %d, %d)\n",
+                    name, domain, class, type);
+#endif
+        if (domain == NULL) {
+                /*
+                 * Check for trailing '.';
+                 * copy without '.' if present.
+                 */
+                n = strlen(name) - 1;
+                if (n != (0 - 1) && name[n] == '.' && n < sizeof(nbuf) - 1) {
+                        bcopy(name, nbuf, n);
+                        nbuf[n] = '\0';
+                } else
+                        longname = name;
+        } else
+                (void)sprintf(nbuf, "%.*s.%.*s",
+                    MAXDNAME, name, MAXDNAME, domain);
+
+        return (res_query(longname, class, type, answer, anslen));
+}
+
+char *
+__hostalias(name)
+        register const char *name;
+{
+        register char *cp1, *cp2;
+        FILE *fp;
+        char *file, *getenv(), *strcpy(), *strncpy();
+        char buf[BUFSIZ];
+        static char abuf[MAXDNAME];
+
+        file = getenv("HOSTALIASES");
+        if (file == NULL || (fp = fopen(file, "r")) == NULL)
+                return (NULL);
+        buf[sizeof(buf) - 1] = '\0';
+        while (fgets(buf, sizeof(buf), fp)) {
+                for (cp1 = buf; *cp1 && !isspace(*cp1); ++cp1);
+                if (!*cp1)
+                        break;
+                *cp1 = '\0';
+                if (!strcasecmp(buf, name)) {
+                        while (isspace(*++cp1));
+                        if (!*cp1)
+                                break;
+                        for (cp2 = cp1 + 1; *cp2 && !isspace(*cp2); ++cp2);
+                        abuf[sizeof(abuf) - 1] = *cp2 = '\0';
+                        (void)strncpy(abuf, cp1, sizeof(abuf) - 1);
+                        fclose(fp);
+                        return (abuf);
+                }
+        }
+        fclose(fp);
+        return (NULL);
+}
diff --git a/src/lib/libc/net/res_send.c b/src/lib/libc/net/res_send.c
new file mode 100644
index 0000000000..e608358180
--- /dev/null
+++ b/src/lib/libc/net/res_send.c
@@ -0,0 +1,474 @@
+/*      $NetBSD: res_send.c,v 1.4 1995/02/25 06:21:01 cgd Exp $ */
+
+/*-
+ * Copyright (c) 1985, 1989, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * -
+ * Portions Copyright (c) 1993 by Digital Equipment Corporation.
+ * 
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies, and that
+ * the name of Digital Equipment Corporation not be used in advertising or
+ * publicity pertaining to distribution of the document or software without
+ * specific, written prior permission.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+ * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ * -
+ * --Copyright--
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)res_send.c  8.1 (Berkeley) 6/4/93";
+static char rcsid[] = "$Id: res_send.c,v 4.9.1.1 1993/05/02 22:43:03 vixie Rel ";
+#else
+static char rcsid[] = "$NetBSD: res_send.c,v 1.4 1995/02/25 06:21:01 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Send query to name server and wait for reply.
+ */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <errno.h>
+#include <resolv.h>
+#include <unistd.h>
+#include <string.h>
+
+static int s = -1;      /* socket used for communications */
+static struct sockaddr no_addr;
+
+#ifndef FD_SET
+#define NFDBITS         32
+#define FD_SETSIZE      32
+#define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
+#define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
+#define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
+#define FD_ZERO(p)      bzero((char *)(p), sizeof(*(p)))
+#endif
+
+res_send(buf, buflen, answer, anslen)
+        const char *buf;
+        int buflen;
+        char *answer;
+        int anslen;
+{
+        register int n;
+        int try, v_circuit, resplen, ns;
+        int gotsomewhere = 0, connected = 0;
+        int connreset = 0;
+        u_short id, len;
+        char *cp;
+        fd_set dsmask;
+        struct timeval timeout;
+        HEADER *hp = (HEADER *) buf;
+        HEADER *anhp = (HEADER *) answer;
+        u_int badns;            /* XXX NSMAX can't exceed #/bits per this */
+        struct iovec iov[2];
+        int terrno = ETIMEDOUT;
+        char junk[512];
+
+#ifdef DEBUG
+        if ((_res.options & RES_DEBUG) || (_res.pfcode & RES_PRF_QUERY)) {
+                printf(";; res_send()\n");
+                __p_query(buf);
+        }
+#endif
+        if (!(_res.options & RES_INIT))
+                if (res_init() == -1) {
+                        return(-1);
+                }
+        v_circuit = (_res.options & RES_USEVC) || buflen > PACKETSZ;
+        id = hp->id;
+        badns = 0;
+        /*
+         * Send request, RETRY times, or until successful
+         */
+        for (try = 0; try < _res.retry; try++) {
+            for (ns = 0; ns < _res.nscount; ns++) {
+                if (badns & (1<<ns))
+                        continue;
+#ifdef DEBUG
+                if (_res.options & RES_DEBUG)
+                        printf(";; Querying server (# %d) address = %s\n",
+                               ns+1,
+                               inet_ntoa(_res.nsaddr_list[ns].sin_addr));
+#endif
+        usevc:
+                if (v_circuit) {
+                        int truncated = 0;
+
+                        /*
+                         * Use virtual circuit;
+                         * at most one attempt per server.
+                         */
+                        try = _res.retry;
+                        if (s < 0) {
+                                s = socket(AF_INET, SOCK_STREAM, 0);
+                                if (s < 0) {
+                                        terrno = errno;
+#ifdef DEBUG
+                                        if (_res.options & RES_DEBUG)
+                                            perror("socket (vc) failed");
+#endif
+                                        continue;
+                                }
+                                if (connect(s,
+                                    (struct sockaddr *)&(_res.nsaddr_list[ns]),
+                                    sizeof(struct sockaddr)) < 0) {
+                                        terrno = errno;
+#ifdef DEBUG
+                                        if (_res.options & RES_DEBUG)
+                                            perror("connect failed");
+#endif
+                                        (void) close(s);
+                                        s = -1;
+                                        continue;
+                                }
+                        }
+                        /*
+                         * Send length & message
+                         */
+                        len = htons((u_short)buflen);
+                        iov[0].iov_base = (caddr_t)&len;
+                        iov[0].iov_len = sizeof(len);
+                        iov[1].iov_base = (char *)buf;
+                        iov[1].iov_len = buflen;
+                        if (writev(s, iov, 2) != sizeof(len) + buflen) {
+                                terrno = errno;
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        perror("write failed");
+#endif
+                                (void) close(s);
+                                s = -1;
+                                continue;
+                        }
+                        /*
+                         * Receive length & response
+                         */
+                        cp = answer;
+                        len = sizeof(short);
+                        while (len != 0 &&
+                            (n = read(s, (char *)cp, (int)len)) > 0) {
+                                cp += n;
+                                len -= n;
+                        }
+                        if (n <= 0) {
+                                terrno = errno;
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        perror("read failed");
+#endif
+                                (void) close(s);
+                                s = -1;
+                                /*
+                                 * A long running process might get its TCP
+                                 * connection reset if the remote server was
+                                 * restarted.  Requery the server instead of
+                                 * trying a new one.  When there is only one
+                                 * server, this means that a query might work
+                                 * instead of failing.  We only allow one reset
+                                 * per query to prevent looping.
+                                 */
+                                if (terrno == ECONNRESET && !connreset) {
+                                        connreset = 1;
+                                        ns--;
+                                }
+                                continue;
+                        }
+                        cp = answer;
+                        if ((resplen = ntohs(*(u_short *)cp)) > anslen) {
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        fprintf(stderr,
+                                                ";; response truncated\n");
+#endif
+                                len = anslen;
+                                truncated = 1;
+                        } else
+                                len = resplen;
+                        while (len != 0 &&
+                           (n = read(s, (char *)cp, (int)len)) > 0) {
+                                cp += n;
+                                len -= n;
+                        }
+                        if (n <= 0) {
+                                terrno = errno;
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        perror("read failed");
+#endif
+                                (void) close(s);
+                                s = -1;
+                                continue;
+                        }
+                        if (truncated) {
+                                /*
+                                 * Flush rest of answer
+                                 * so connection stays in synch.
+                                 */
+                                anhp->tc = 1;
+                                len = resplen - anslen;
+                                while (len != 0) {
+                                        n = (len > sizeof(junk) ?
+                                            sizeof(junk) : len);
+                                        if ((n = read(s, junk, n)) > 0)
+                                                len -= n;
+                                        else
+                                                break;
+                                }
+                        }
+                } else {
+                        /*
+                         * Use datagrams.
+                         */
+                        if (s < 0) {
+                                s = socket(AF_INET, SOCK_DGRAM, 0);
+                                if (s < 0) {
+                                        terrno = errno;
+#ifdef DEBUG
+                                        if (_res.options & RES_DEBUG)
+                                            perror("socket (dg) failed");
+#endif
+                                        continue;
+                                }
+                        }
+                        /*
+                         * I'm tired of answering this question, so:
+                         * On a 4.3BSD+ machine (client and server,
+                         * actually), sending to a nameserver datagram
+                         * port with no nameserver will cause an
+                         * ICMP port unreachable message to be returned.
+                         * If our datagram socket is "connected" to the
+                         * server, we get an ECONNREFUSED error on the next
+                         * socket operation, and select returns if the
+                         * error message is received.  We can thus detect
+                         * the absence of a nameserver without timing out.
+                         * If we have sent queries to at least two servers,
+                         * however, we don't want to remain connected,
+                         * as we wish to receive answers from the first
+                         * server to respond.
+                         */
+                        if (_res.nscount == 1 || (try == 0 && ns == 0)) {
+                                /*
+                                 * Don't use connect if we might
+                                 * still receive a response
+                                 * from another server.
+                                 */
+                                if (connected == 0) {
+                                        if (connect(s,
+                                            (struct sockaddr *)
+                                            &_res.nsaddr_list[ns],
+                                            sizeof(struct sockaddr)) < 0) {
+#ifdef DEBUG
+                                                if (_res.options & RES_DEBUG)
+                                                        perror("connect");
+#endif
+                                                continue;
+                                        }
+                                        connected = 1;
+                                }
+                                if (send(s, buf, buflen, 0) != buflen) {
+#ifdef DEBUG
+                                        if (_res.options & RES_DEBUG)
+                                                perror("send");
+#endif
+                                        continue;
+                                }
+                        } else {
+                                /*
+                                 * Disconnect if we want to listen
+                                 * for responses from more than one server.
+                                 */
+                                if (connected) {
+                                        (void) connect(s, &no_addr,
+                                            sizeof(no_addr));
+                                        connected = 0;
+                                }
+                                if (sendto(s, buf, buflen, 0,
+                                    (struct sockaddr *)&_res.nsaddr_list[ns],
+                                    sizeof(struct sockaddr)) != buflen) {
+#ifdef DEBUG
+                                        if (_res.options & RES_DEBUG)
+                                                perror("sendto");
+#endif
+                                        continue;
+                                }
+                        }
+
+                        /*
+                         * Wait for reply
+                         */
+                        timeout.tv_sec = (_res.retrans << try);
+                        if (try > 0)
+                                timeout.tv_sec /= _res.nscount;
+                        if ((long) timeout.tv_sec <= 0)
+                                timeout.tv_sec = 1;
+                        timeout.tv_usec = 0;
+wait:
+                        FD_ZERO(&dsmask);
+                        FD_SET(s, &dsmask);
+                        n = select(s+1, &dsmask, (fd_set *)NULL,
+                                (fd_set *)NULL, &timeout);
+                        if (n < 0) {
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        perror("select");
+#endif
+                                continue;
+                        }
+                        if (n == 0) {
+                                /*
+                                 * timeout
+                                 */
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        printf(";; timeout\n");
+#endif
+                                gotsomewhere = 1;
+                                continue;
+                        }
+                        if ((resplen = recv(s, answer, anslen, 0)) <= 0) {
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        perror("recvfrom");
+#endif
+                                continue;
+                        }
+                        gotsomewhere = 1;
+                        if (id != anhp->id) {
+                                /*
+                                 * response from old query, ignore it
+                                 */
+#ifdef DEBUG
+                                if ((_res.options & RES_DEBUG) ||
+                                    (_res.pfcode & RES_PRF_REPLY)) {
+                                        printf(";; old answer:\n");
+                                        __p_query(answer);
+                                }
+#endif
+                                goto wait;
+                        }
+                        if (anhp->rcode == SERVFAIL || anhp->rcode == NOTIMP ||
+                            anhp->rcode == REFUSED) {
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG) {
+                                        printf("server rejected query:\n");
+                                        __p_query(answer);
+                                }
+#endif
+                                badns |= (1<<ns);
+                                continue;
+                        }
+                        if (!(_res.options & RES_IGNTC) && anhp->tc) {
+                                /*
+                                 * get rest of answer;
+                                 * use TCP with same server.
+                                 */
+#ifdef DEBUG
+                                if (_res.options & RES_DEBUG)
+                                        printf(";; truncated answer\n");
+#endif
+                                (void) close(s);
+                                s = -1;
+                                v_circuit = 1;
+                                goto usevc;
+                        }
+                }
+#ifdef DEBUG
+                if (_res.options & RES_DEBUG)
+                        printf(";; got answer:\n");
+                if ((_res.options & RES_DEBUG) ||
+                    (_res.pfcode & RES_PRF_REPLY))
+                        __p_query(answer);
+#endif
+                /*
+                 * If using virtual circuits, we assume that the first server
+                 * is preferred * over the rest (i.e. it is on the local
+                 * machine) and only keep that one open.
+                 * If we have temporarily opened a virtual circuit,
+                 * or if we haven't been asked to keep a socket open,
+                 * close the socket.
+                 */
+                if ((v_circuit &&
+                    ((_res.options & RES_USEVC) == 0 || ns != 0)) ||
+                    (_res.options & RES_STAYOPEN) == 0) {
+                        (void) close(s);
+                        s = -1;
+                }
+                return (resplen);
+           }
+        }
+        if (s >= 0) {
+                (void) close(s);
+                s = -1;
+        }
+        if (v_circuit == 0)
+                if (gotsomewhere == 0)
+                        errno = ECONNREFUSED;   /* no nameservers found */
+                else
+                        errno = ETIMEDOUT;      /* no answer obtained */
+        else
+                errno = terrno;
+        return (-1);
+}
+
+/*
+ * This routine is for closing the socket if a virtual circuit is used and
+ * the program wants to close it.  This provides support for endhostent()
+ * which expects to close the socket.
+ *
+ * This routine is not expected to be user visible.
+ */
+_res_close()
+{
+        if (s != -1) {
+                (void) close(s);
+                s = -1;
+        }
+}
diff --git a/src/lib/libc/net/resolver.3 b/src/lib/libc/net/resolver.3
new file mode 100644
index 0000000000..99abe17f03
--- /dev/null
+++ b/src/lib/libc/net/resolver.3
@@ -0,0 +1,344 @@
+.\"     $NetBSD: resolver.3,v 1.5 1995/02/25 06:21:02 cgd Exp $
+.\"
+.\" Copyright (c) 1985, 1991, 1993
+.\"     The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"     This product includes software developed by the University of
+.\"     California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)resolver.3  8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt RESOLVER 3
+.Os BSD 4.3
+.Sh NAME
+.Nm res_query ,
+.Nm res_search ,
+.Nm res_mkquery ,
+.Nm res_send ,
+.Nm res_init ,
+.Nm dn_comp ,
+.Nm dn_expand
+.Nd resolver routines
+.Sh SYNOPSIS
+.Fd #include <sys/types.h>
+.Fd #include <netinet/in.h>
+.Fd #include <arpa/nameser.h>
+.Fd #include <resolv.h>
+.Fo res_query
+.Fa "char *dname"
+.Fa "int class"
+.Fa "int type"
+.Fa "u_char *answer"
+.Fa "int anslen"
+.Fc
+.Fo res_search
+.Fa "char *dname"
+.Fa "int class"
+.Fa "int type"
+.Fa "u_char *answer"
+.Fa "int anslen"
+.Fc
+.Fo res_mkquery
+.Fa "int op"
+.Fa "char *dname"
+.Fa "int class"
+.Fa "int type"
+.Fa "char *data"
+.Fa "int datalen"
+.Fa "struct rrec *newrr"
+.Fa "char *buf"
+.Fa "int buflen"
+.Fc
+.Fo res_send
+.Fa "char *msg"
+.Fa "int msglen"
+.Fa "char *answer"
+.Fa "int anslen"
+.Fc
+.Fn res_init 
+.Fo dn_comp
+.Fa "char *exp_dn"
+.Fa "char *comp_dn"
+.Fa "int length"
+.Fa "char **dnptrs"
+.Fa "char **lastdnptr"
+.Fc
+.Fo dn_expand
+.Fa "u_char *msg"
+.Fa "u_char *eomorig"
+.Fa "u_char *comp_dn"
+.Fa "u_char *exp_dn"
+.Fa "int length"
+.Fc
+.Sh DESCRIPTION
+These routines are used for making, sending and interpreting
+query and reply messages with Internet domain name servers.
+.Pp
+Global configuration and state information that is used by the
+resolver routines is kept in the structure
+.Em _res .
+Most of the values have reasonable defaults and can be ignored.
+Options
+stored in
+.Em _res.options
+are defined in
+.Pa resolv.h
+and are as follows.
+Options are stored as a simple bit mask containing the bitwise ``or''
+of the options enabled.
+.Bl -tag -width RES_DEFNAMES
+.It Dv RES_INIT
+True if the initial name server address and default domain name are
+initialized (i.e.,
+.Fn res_init
+has been called).
+.It Dv RES_DEBUG
+Print debugging messages.
+.It Dv RES_AAONLY
+Accept authoritative answers only.
+With this option,
+.Fn res_send
+should continue until it finds an authoritative answer or finds an error.
+Currently this is not implemented.
+.It Dv RES_USEVC
+Use
+.Tn TCP
+connections for queries instead of
+.Tn UDP
+datagrams.
+.It Dv RES_STAYOPEN
+Used with
+.Dv RES_USEVC
+to keep the
+.Tn TCP
+connection open between
+queries.
+This is useful only in programs that regularly do many queries.
+.Tn UDP
+should be the normal mode used.
+.It Dv RES_IGNTC
+Unused currently (ignore truncation errors, i.e., don't retry with
+.Tn TCP ) .
+.It Dv RES_RECURSE
+Set the recursion-desired bit in queries.
+This is the default.
+.Pf ( Fn res_send
+does not do iterative queries and expects the name server
+to handle recursion.)
+.It Dv RES_DEFNAMES
+If set,
+.Fn res_search
+will append the default domain name to single-component names
+(those that do not contain a dot).
+This option is enabled by default.
+.It Dv RES_DNSRCH
+If this option is set,
+.Fn res_search
+will search for host names in the current domain and in parent domains; see
+.Xr hostname 7 .
+This is used by the standard host lookup routine
+.Xr gethostbyname 3 .
+This option is enabled by default.
+.El
+.Pp
+The
+.Fn res_init
+routine
+reads the configuration file (if any; see
+.Xr resolv.conf 5 )
+to get the default domain name,
+search list and
+the Internet address of the local name server(s).
+If no server is configured, the host running
+the resolver is tried.
+The current domain name is defined by the hostname
+if not specified in the configuration file;
+it can be overridden by the environment variable
+.Ev LOCALDOMAIN .
+This environment variable may contain several blank-separated
+tokens if you wish to override the
+.Fa search list
+on a per-process basis.
+This is similar to the
+.Fa search
+command in the configuration file.
+Another environment variable
+.Ev RES_OPTIONS
+can be set to override certain internal resolver options which
+are otherwise set by changing fields in the
+.Fa _res
+structure or are inherited from the configuration file's
+.Fa options
+command.
+The syntax of the
+.Ev RES_OPTIONS
+environment variable is explained in
+.Xr resolv.conf 5 .
+Initialization normally occurs on the first call
+to one of the following routines.
+.Pp
+The
+.Fn res_query
+function provides an interface to the server query mechanism.
+It constructs a query, sends it to the local server,
+awaits a response, and makes preliminary checks on the reply.
+The query requests information of the specified
+.Fa type
+and
+.Fa class
+for the specified fully-qualified domain name
+.Fa dname .
+The reply message is left in the
+.Fa answer
+buffer with length
+.Fa anslen
+supplied by the caller.
+.Pp
+The
+.Fn res_search
+routine makes a query and awaits a response like
+.Fn res_query ,
+but in addition, it implements the default and search rules
+controlled by the
+.Dv RES_DEFNAMES
+and
+.Dv RES_DNSRCH
+options.
+It returns the first successful reply.
+.Pp
+The remaining routines are lower-level routines used by
+.Fn res_query .
+The
+.Fn res_mkquery
+function
+constructs a standard query message and places it in
+.Fa buf .
+It returns the size of the query, or \-1 if the query is
+larger than
+.Fa buflen .
+The query type
+.Fa op
+is usually
+.Dv QUERY ,
+but can be any of the query types defined in
+.Aq Pa arpa/nameser.h .
+The domain name for the query is given by
+.Fa dname .
+.Fa Newrr
+is currently unused but is intended for making update messages.
+.Pp
+The
+.Fn res_send
+routine
+sends a pre-formatted query and returns an answer.
+It will call
+.Fn res_init
+if
+.Dv RES_INIT
+is not set, send the query to the local name server, and
+handle timeouts and retries.
+The length of the reply message is returned, or
+\-1 if there were errors.
+.Pp
+The
+.Fn dn_comp
+function
+compresses the domain name
+.Fa exp_dn
+and stores it in
+.Fa comp_dn .
+The size of the compressed name is returned or \-1 if there were errors.
+The size of the array pointed to by
+.Fa comp_dn
+is given by
+.Fa length .
+The compression uses
+an array of pointers
+.Fa dnptrs
+to previously-compressed names in the current message.
+The first pointer points to
+to the beginning of the message and the list ends with
+.Dv NULL .
+The limit to the array is specified by
+.Fa lastdnptr .
+A side effect of
+.Fn dn_comp
+is to update the list of pointers for
+labels inserted into the message
+as the name is compressed.
+If
+.Em dnptr
+is
+.Dv NULL, names are not compressed.
+If
+.Fa lastdnptr
+is
+.Dv NULL ,
+the list of labels is not updated.
+.Pp
+The
+.Fn dn_expand
+entry
+expands the compressed domain name
+.Fa comp_dn
+to a full domain name
+The compressed name is contained in a query or reply message;
+.Fa msg
+is a pointer to the beginning of the message.
+The uncompressed name is placed in the buffer indicated by
+.Fa exp_dn
+which is of size
+.Fa length .
+The size of compressed name is returned or \-1 if there was an error.
+.Sh FILES
+.Bl -tag -width Pa
+/etc/resolv.conf
+The configuration file
+see
+.Xr resolv.conf 5 .
+.El
+.Sh SEE ALSO
+.Xr gethostbyname 3 ,
+.Xr named 8 ,
+.Xr resolv.conf 5 ,
+.Xr hostname 7 ,
+.Pp
+.%T RFC1032 ,
+.%T RFC1033 ,
+.%T RFC1034 ,
+.%T RFC1035 ,
+.%T RFC974
+.Rs
+.%T "Name Server Operations Guide for BIND"
+.Re
+.Sh HISTORY
+The
+.Nm
+function appeared in 
+.Bx 4.3 .
diff --git a/src/lib/libc/net/send.c b/src/lib/libc/net/send.c
new file mode 100644
index 0000000000..88f3550ec6
--- /dev/null
+++ b/src/lib/libc/net/send.c
@@ -0,0 +1,56 @@
+/*      $NetBSD: send.c,v 1.6 1995/02/25 06:21:02 cgd Exp $     */
+
+/*
+ * Copyright (c) 1988, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)send.c      8.2 (Berkeley) 2/21/94";
+#else
+static char rcsid[] = "$NetBSD: send.c,v 1.6 1995/02/25 06:21:02 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <stddef.h>
+
+ssize_t
+send(s, msg, len, flags)
+        int s, flags;
+        size_t len;
+        const void *msg;
+{
+        return (sendto(s, msg, len, flags, NULL, 0));
+}
diff --git a/src/lib/libc/net/sethostent.c b/src/lib/libc/net/sethostent.c
new file mode 100644
index 0000000000..00f6499695
--- /dev/null
+++ b/src/lib/libc/net/sethostent.c
@@ -0,0 +1,62 @@
+/*      $NetBSD: sethostent.c,v 1.4 1995/02/25 06:21:03 cgd Exp $       */
+
+/*
+ * Copyright (c) 1985, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)sethostent.c        8.1 (Berkeley) 6/4/93";
+#else
+static char rcsid[] = "$NetBSD: sethostent.c,v 1.4 1995/02/25 06:21:03 cgd Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <netdb.h>
+#include <resolv.h>
+
+void
+sethostent(stayopen)
+{
+        if (stayopen)
+                _res.options |= RES_STAYOPEN | RES_USEVC;
+}
+
+void
+endhostent()
+{
+        _res.options &= ~(RES_STAYOPEN | RES_USEVC);
+        _res_close();
+}