From 5a929640374d7dbe9d197ffece1bc89ea7859da6 Mon Sep 17 00:00:00 2001
From: Bill Fenner <fenner@FreeBSD.org>
Date: Sat, 4 Mar 2000 23:54:27 +0000
Subject: [PATCH] Import of updated file for 0.5 release

---
 contrib/libpcap/gencode.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/contrib/libpcap/gencode.c b/contrib/libpcap/gencode.c
index 0298350d6043..6aa956b1543b 100644
--- a/contrib/libpcap/gencode.c
+++ b/contrib/libpcap/gencode.c
@@ -21,7 +21,7 @@
  */
 #ifndef lint
 static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.100 1999/12/08 19:54:03 mcr Exp $ (LBL)";
+    "@(#) $Header: /tcpdump/master/libpcap/gencode.c,v 1.100.2.1 2000/03/01 14:12:54 itojun Exp $ (LBL)";
 #endif
 
 #include <sys/types.h>
@@ -2045,15 +2045,21 @@ gen_scode(name, q)
 				tproto = Q_IP;
 				tproto6 = Q_IPV6;
 			}
-			while (res) {
+			for (res = res0; res; res = res->ai_next) {
 				switch (res->ai_family) {
 				case AF_INET:
+					if (tproto == Q_IPV6)
+						continue;
+
 					sin = (struct sockaddr_in *)
 						res->ai_addr;
 					tmp = gen_host(ntohl(sin->sin_addr.s_addr),
 						0xffffffff, tproto, dir);
 					break;
 				case AF_INET6:
+					if (tproto6 == Q_IP)
+						continue;
+
 					sin6 = (struct sockaddr_in6 *)
 						res->ai_addr;
 					tmp = gen_host6(&sin6->sin6_addr,
@@ -2063,10 +2069,14 @@ gen_scode(name, q)
 				if (b)
 					gen_or(b, tmp);
 				b = tmp;
-
-				res = res->ai_next;
 			}
 			freeaddrinfo(res0);
+			if (b == NULL) {
+				bpf_error("unknown host '%s'%s", name,
+				    (proto == Q_DEFAULT)
+					? ""
+					: " for specified address family");
+			}
 			return b;
 #endif /*INET6*/
 		}
@@ -2423,7 +2433,7 @@ gen_load(proto, index, size)
 #ifdef INET6
 	case Q_IPV6:
 #endif
-		/* XXX Note that we assume a fixed link link header here. */
+		/* XXX Note that we assume a fixed link header here. */
 		s = xfer_to_x(index);
 		tmp = new_stmt(BPF_LD|BPF_IND|size);
 		tmp->s.k = off_nl;