From d21d623f8e8a4315c961e4c21e8791364bf5da82 Mon Sep 17 00:00:00 2001
From: bms <bms@FreeBSD.org>
Date: Wed, 25 Feb 2004 23:45:57 +0000
Subject: Sync HEAD sources to vendor branch import of routed v2.27 from
 rhyolite.com. Update <protocols/routed.h> for the MD5 changes requested in
 bin/35843. Preserve local changes.

Education by:	obrien, markm, pointy-stick
PR:		bin/35843 (and doubtless others)
---
 sbin/routed/rdisc.c | 43 ++++++++++++++++++++++++++++---------------
 1 file changed, 28 insertions(+), 15 deletions(-)

(limited to 'sbin/routed/rdisc.c')

diff --git a/sbin/routed/rdisc.c b/sbin/routed/rdisc.c
index 56eed8c..c07adb6 100644
--- a/sbin/routed/rdisc.c
+++ b/sbin/routed/rdisc.c
@@ -38,10 +38,13 @@
 #include <netinet/ip.h>
 #include <netinet/ip_icmp.h>
 
-#if !defined(sgi) && !defined(__NetBSD__)
-static char sccsid[] __attribute__((unused)) = "@(#)rdisc.c	8.1 (Berkeley) x/y/95";
-#elif defined(__NetBSD__)
+#ifdef __NetBSD__
 __RCSID("$NetBSD$");
+#elif defined(__FreeBSD__)
+__RCSID("$FreeBSD$");
+#else
+__RCSID("$Revision: 2.27 $");
+#ident "$Revision: 2.27 $"
 #endif
 #ident "$FreeBSD$"
 
@@ -97,8 +100,9 @@ struct dr {				/* accumulated advertisements */
 #define UNSIGN_PREF(p) SIGN_PREF(p)
 /* adjust unsigned preference by interface metric,
  * without driving it to infinity */
-#define PREF(p, ifp) ((int)(p) <= (ifp)->int_metric ? ((p) != 0 ? 1 : 0) \
-		      : (p) - ((ifp)->int_metric))
+#define PREF(p, ifp) ((int)(p) <= ((ifp)->int_metric+(ifp)->int_adj_outmetric)\
+		      ? ((p) != 0 ? 1 : 0)				    \
+		      : (p) - ((ifp)->int_metric+(ifp)->int_adj_outmetric))
 
 static void rdisc_sort(void);
 
@@ -191,9 +195,13 @@ set_rdisc_mg(struct interface *ifp,
 		return;
 #endif
 	memset(&m, 0, sizeof(m));
+#ifdef MCAST_IFINDEX
+	m.imr_interface.s_addr = htonl(ifp->int_index);
+#else
 	m.imr_interface.s_addr = ((ifp->int_if_flags & IFF_POINTOPOINT)
 				  ? ifp->int_dstaddr
 				  : ifp->int_addr);
+#endif
 	if (supplier
 	    || (ifp->int_state & IS_NO_ADV_IN)
 	    || !on) {
@@ -693,17 +701,17 @@ send_rdisc(union ad_u *p,
 	   naddr dst,			/* 0 or unicast destination */
 	   int	type)			/* 0=unicast, 1=bcast, 2=mcast */
 {
-	struct sockaddr_in sin;
+	struct sockaddr_in rsin;
 	int flags;
 	const char *msg;
 	naddr tgt_mcast;
 
 
-	memset(&sin, 0, sizeof(sin));
-	sin.sin_addr.s_addr = dst;
-	sin.sin_family = AF_INET;
+	memset(&rsin, 0, sizeof(rsin));
+	rsin.sin_addr.s_addr = dst;
+	rsin.sin_family = AF_INET;
 #ifdef _HAVE_SIN_LEN
-	sin.sin_len = sizeof(sin);
+	rsin.sin_len = sizeof(rsin);
 #endif
 	flags = MSG_DONTROUTE;
 
@@ -716,10 +724,10 @@ send_rdisc(union ad_u *p,
 	case 1:				/* broadcast */
 		if (ifp->int_if_flags & IFF_POINTOPOINT) {
 			msg = "Send pt-to-pt";
-			sin.sin_addr.s_addr = ifp->int_dstaddr;
+			rsin.sin_addr.s_addr = ifp->int_dstaddr;
 		} else {
 			msg = "Send broadcast";
-			sin.sin_addr.s_addr = ifp->int_brdaddr;
+			rsin.sin_addr.s_addr = ifp->int_brdaddr;
 		}
 		break;
 
@@ -733,6 +741,10 @@ send_rdisc(union ad_u *p,
 		}
 		if (rdisc_sock_mcast != ifp) {
 			/* select the right interface. */
+#ifdef MCAST_IFINDEX
+			/* specify ifindex */
+			tgt_mcast = htonl(ifp->int_index);
+#else
 #ifdef MCAST_PPP_BUG
 			/* Do not specify the primary interface explicitly
 			 * if we have the multicast point-to-point kernel
@@ -746,6 +758,7 @@ send_rdisc(union ad_u *p,
 			} else
 #endif
 			tgt_mcast = ifp->int_addr;
+#endif
 			if (0 > setsockopt(rdisc_sock,
 					   IPPROTO_IP, IP_MULTICAST_IF,
 					   &tgt_mcast, sizeof(tgt_mcast))) {
@@ -763,16 +776,16 @@ send_rdisc(union ad_u *p,
 	if (rdisc_sock < 0)
 		get_rdisc_sock();
 
-	trace_rdisc(msg, ifp->int_addr, sin.sin_addr.s_addr, ifp,
+	trace_rdisc(msg, ifp->int_addr, rsin.sin_addr.s_addr, ifp,
 		    p, p_size);
 
 	if (0 > sendto(rdisc_sock, p, p_size, flags,
-		       (struct sockaddr *)&sin, sizeof(sin))) {
+		       (struct sockaddr *)&rsin, sizeof(rsin))) {
 		if (ifp == 0 || !(ifp->int_state & IS_BROKE))
 			msglog("sendto(%s%s%s): %s",
 			       ifp != 0 ? ifp->int_name : "",
 			       ifp != 0 ? ", " : "",
-			       inet_ntoa(sin.sin_addr),
+			       inet_ntoa(rsin.sin_addr),
 			       strerror(errno));
 		if (ifp != 0)
 			if_sick(ifp);
-- 
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