1 files changed, 31 insertions, 25 deletions

diff --git a/src/lib/libc/net/resolver.3 b/src/lib/libc/net/resolver.3
index 577420e9f1..ac48252e83 100644
--- a/src/lib/libc/net/resolver.3
+++ b/src/lib/libc/net/resolver.3
@@ -1,4 +1,4 @@
-.\"     $OpenBSD: resolver.3,v 1.17 2003/08/08 09:26:02 jmc Exp $
+.\"     $OpenBSD: resolver.3,v 1.18 2005/01/22 15:44:25 jmc Exp $
 .\"
 .\" Copyright (c) 1985, 1991, 1993
 .\"     The Regents of the University of California.  All rights reserved.
@@ -46,7 +46,7 @@
 .Fd #include <resolv.h>
 .Ft int
 .Fo res_query
-.Fa "char *dname"
+.Fa "const char *dname"
 .Fa "int class"
 .Fa "int type"
 .Fa "u_char *answer"
@@ -54,7 +54,7 @@
 .Fc
 .Ft int
 .Fo res_search
-.Fa "char *dname"
+.Fa "const char *dname"
 .Fa "int class"
 .Fa "int type"
 .Fa "u_char *answer"
@@ -63,38 +63,38 @@
 .Ft int
 .Fo res_mkquery
 .Fa "int op"
-.Fa "char *dname"
+.Fa "const char *dname"
 .Fa "int class"
 .Fa "int type"
-.Fa "char *data"
+.Fa "const u_char *data"
 .Fa "int datalen"
-.Fa "struct rrec *newrr"
-.Fa "char *buf"
+.Fa "const u_char *newrr"
+.Fa "u_char *buf"
 .Fa "int buflen"
 .Fc
 .Ft int
 .Fo res_send
-.Fa "char *msg"
+.Fa "const u_char *msg"
 .Fa "int msglen"
-.Fa "char *answer"
+.Fa "u_char *answer"
 .Fa "int anslen"
 .Fc
 .Ft int
 .Fn res_init "void"
 .Ft int
 .Fo dn_comp
-.Fa "char *exp_dn"
-.Fa "char *comp_dn"
+.Fa "const char *exp_dn"
+.Fa "u_char *comp_dn"
 .Fa "int length"
-.Fa "char **dnptrs"
-.Fa "char **lastdnptr"
+.Fa "u_char **dnptrs"
+.Fa "u_char **lastdnptr"
 .Fc
 .Ft int
 .Fo dn_expand
-.Fa "u_char *msg"
-.Fa "u_char *eomorig"
-.Fa "u_char *comp_dn"
-.Fa "u_char *exp_dn"
+.Fa "const u_char *msg"
+.Fa "const u_char *eomorig"
+.Fa "const u_char *comp_dn"
+.Fa "char *exp_dn"
 .Fa "int length"
 .Fc
 .Sh DESCRIPTION
@@ -171,6 +171,14 @@ This causes IPv4 addresses to be returned as an IPv4 mapped address.
 For example, 10.1.1.1 will be returned as ::ffff:10.1.1.1.
 The option is not meaningful on
 .Ox .
+.It Dv RES_USE_EDNS0
+Enables support for OPT pseudo-RR for EDNS0 extension.
+With this option, resolver code will attach OPT pseudo-RR into DNS queries,
+to inform of our receive buffer size.
+The option will allow DNS servers to take advantage of non-default receive
+buffer size, and to send larger replies.
+DNS query packets with EDNS0 extension is not compatible with
+non-EDNS0 DNS servers.
 .El
 .Pp
 The
@@ -303,7 +311,7 @@ The
 .Fn dn_expand
 entry expands the compressed domain name
 .Fa comp_dn
-to a full domain name
+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.
@@ -313,11 +321,9 @@ 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
-configuration file
-see
-.Xr resolv.conf 5 .
+.Bl -tag -width "/etc/resolv.confXX"
+.It Pa /etc/resolv.conf
+The configuration file.
 .El
 .Sh SEE ALSO
 .Xr gethostbyname 3 ,
@@ -325,12 +331,12 @@ see
 .Xr hostname 7 ,
 .Xr named 8
 .Pp
+.%T RFC 974 ,
 .%T RFC 1032 ,
 .%T RFC 1033 ,
 .%T RFC 1034 ,
 .%T RFC 1035 ,
-.%T RFC 1535 ,
-.%T RFC 974
+.%T RFC 1535
 .Rs
 .%T "Name Server Operations Guide for BIND"
 .Re