1 files changed, 178 insertions, 0 deletions

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;
+}