From 97005ca0b5978c6b6ea5259bf982a229e901382b Mon Sep 17 00:00:00 2001
From: ume <ume@ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f>
Date: Fri, 24 Oct 2003 18:26:30 +0000
Subject: [PATCH] Switch Advanced Sockets API for IPv6 from RFC2292 to RFC3542
 (aka RFC2292bis).  Though I believe this commit doesn't break backward
 compatibility againt existing binaries, it breaks backward compatibility of
 API. Now, the applications which use Advanced Sockets API such as telnet,
 ping6, mld6query and traceroute6 use RFC3542 API.

Obtained from:	KAME


git-svn-id: http://svn0.us-east.freebsd.org/base/head/contrib/telnet@121472 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
---
 telnet/commands.c | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/telnet/commands.c b/telnet/commands.c
index 2635a20..906a875 100644
--- a/telnet/commands.c
+++ b/telnet/commands.c
@@ -2846,7 +2846,7 @@ sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop,
 	struct sockaddr_in *_sin;
 #ifdef INET6
 	struct sockaddr_in6 *sin6;
-	struct cmsghdr *cmsg;
+	struct ip6_rthdr *rth;
 #endif
 	struct addrinfo hints, *res;
 	int error;
@@ -2889,11 +2889,13 @@ sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop,
 
 #ifdef INET6
 	if (ai->ai_family == AF_INET6) {
-		cmsg = inet6_rthdr_init(*cpp, IPV6_RTHDR_TYPE_0);
+		if ((rth = inet6_rth_init((void *)*cpp, sizeof(buf),
+					  IPV6_RTHDR_TYPE_0, 0)) == NULL)
+			return -1;
 		if (*cp != '@')
 			return -1;
 		*protop = IPPROTO_IPV6;
-		*optp = IPV6_PKTOPTIONS;
+		*optp = IPV6_RTHDR;
 	} else
 #endif
       {
@@ -2965,8 +2967,8 @@ sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop,
 #ifdef INET6
 		if (res->ai_family == AF_INET6) {
 			sin6 = (struct sockaddr_in6 *)res->ai_addr;
-			inet6_rthdr_add(cmsg, &sin6->sin6_addr,
-					IPV6_RTHDR_LOOSE);
+			if (inet6_rth_add((void *)rth, &sin6->sin6_addr) == -1)
+				return(0);
 		} else
 #endif
 	      {
@@ -2981,23 +2983,14 @@ sourceroute(struct addrinfo *ai, char *arg, char **cpp, int *lenp, int *protop,
 		/*
 		 * Check to make sure there is space for next address
 		 */
-#ifdef INET6
-		if (res->ai_family == AF_INET6) {
-			if (((char *)CMSG_DATA(cmsg) +
-			     sizeof(struct ip6_rthdr) +
-			     ((inet6_rthdr_segments(cmsg) + 1) *
-			      sizeof(struct in6_addr))) > ep)
-			return -1;
-		} else
-#endif
 		if (lsrp + 4 > ep)
 			return -1;
 		freeaddrinfo(res);
 	}
 #ifdef INET6
 	if (res->ai_family == AF_INET6) {
-		inet6_rthdr_lasthop(cmsg, IPV6_RTHDR_LOOSE);
-		*lenp = cmsg->cmsg_len;
+		rth->ip6r_len = rth->ip6r_segleft * 2;
+		*lenp = (rth->ip6r_len + 1) << 3;
 	} else
 #endif
       {