From f9de0abc76c4e3689b1193475d1984d9fb185aa2 Mon Sep 17 00:00:00 2001
From: darrenr <darrenr@FreeBSD.org>
Date: Mon, 15 Oct 2001 14:16:18 +0000
Subject: catch forwarded ipv6 packets with pfil_hooks for outbound things too

---
 sys/netinet6/ip6_forward.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'sys/netinet6')

diff --git a/sys/netinet6/ip6_forward.c b/sys/netinet6/ip6_forward.c
index 444cd2c..2770e0b 100644
--- a/sys/netinet6/ip6_forward.c
+++ b/sys/netinet6/ip6_forward.c
@@ -49,6 +49,9 @@
 
 #include <net/if.h>
 #include <net/route.h>
+#ifdef PFIL_HOOKS
+#include <net/pfil.h>
+#endif
 
 #include <netinet/in.h>
 #include <netinet/in_var.h>
@@ -75,6 +78,11 @@
 
 #include <net/net_osdep.h>
 
+#include <netinet6/ip6protosw.h>
+
+extern struct ip6protosw inet6sw[];
+extern u_char ip6_protox[IPPROTO_MAX];
+
 struct	route_in6 ip6_forward_rt;
 
 /*
@@ -101,6 +109,11 @@ ip6_forward(m, srcrt)
 	int error, type = 0, code = 0;
 	struct mbuf *mcopy = NULL;
 	struct ifnet *origifp;	/* maybe unnecessary */
+#ifdef PFIL_HOOKS
+	struct packet_filter_hook *pfh;
+	struct mbuf *m1;
+	int rv;
+#endif /* PFIL_HOOKS */
 #ifdef IPSEC
 	struct secpolicy *sp = NULL;
 #endif
@@ -503,6 +516,27 @@ ip6_forward(m, srcrt)
 	in6_clearscope(&ip6->ip6_dst);
 #endif
 
+#ifdef PFIL_HOOKS
+	/*
+	 * Run through list of hooks for output packets.
+	 */
+	m1 = m;
+	pfh = pfil_hook_get(PFIL_OUT, &inet6sw[ip6_protox[IPPROTO_IPV6]].pr_pfh);
+	for (; pfh; pfh = pfh->pfil_link.tqe_next)
+		if (pfh->pfil_func) {
+			rv = pfh->pfil_func(ip6, sizeof(*ip6),
+					    rt->rt_ifp, 1, &m1);
+			if (rv) {
+				error = EHOSTUNREACH;
+				goto freecopy;
+			}
+			m = m1;
+			if (m == NULL)
+				goto freecopy;
+			ip6 = mtod(m, struct ip6_hdr *);
+		}
+#endif /* PFIL_HOOKS */
+
 	error = nd6_output(rt->rt_ifp, origifp, m, dst, rt);
 	if (error) {
 		in6_ifstat_inc(rt->rt_ifp, ifs6_out_discard);
-- 
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