bring in KAME IPv6 code, dated 19991208.

replaces NRL IPv6 layer.  reuses NRL pcb layer.  no IPsec-on-v6 support.
see sys/netinet6/{TODO,IMPLEMENTATION} for more details.

GENERIC configuration should work fine as before.  GENERIC.v6 works fine
as well, but you'll need KAME userland tools to play with IPv6 (will be
bringed into soon).

1 files changed, 172 insertions, 0 deletions

diff --git a/sys/netinet6/route6.c b/sys/netinet6/route6.c
new file mode 100644
index 00000000000..7fda631cec5
--- /dev/null
+++ b/sys/netinet6/route6.c
@@ -0,0 +1,172 @@
+/*	$OpenBSD: route6.c,v 1.1 1999/12/08 06:50:24 itojun Exp $	*/
+
+/*
+ * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the project nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/mbuf.h>
+#include <sys/socket.h>
+#include <sys/systm.h>
+
+#include <net/if.h>
+
+#include <netinet/in.h>
+#include <netinet6/in6_var.h>
+#include <netinet6/ip6.h>
+#include <netinet6/ip6_var.h>
+
+#include <netinet/icmp6.h>
+
+static int ip6_rthdr0 __P((struct mbuf *, struct ip6_hdr *, struct ip6_rthdr0 *));
+
+int
+route6_input(mp, offp, proto)
+	struct mbuf **mp;
+	int *offp, proto;	/* proto is unused */
+{
+	register struct ip6_hdr *ip6;
+	register struct mbuf *m = *mp;
+	register struct ip6_rthdr *rh;
+	int off = *offp, rhlen;
+
+#ifndef PULLDOWN_TEST
+	IP6_EXTHDR_CHECK(m, off, sizeof(*rh), IPPROTO_DONE);
+	ip6 = mtod(m, struct ip6_hdr *);
+	rh = (struct ip6_rthdr *)((caddr_t)ip6 + off);
+#else
+	ip6 = mtod(m, struct ip6_hdr *);
+	IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, sizeof(*rh));
+	if (rh == NULL) {
+		ip6stat.ip6s_tooshort++;
+		return IPPROTO_DONE;
+	}
+#endif
+
+	switch(rh->ip6r_type) {
+	 case IPV6_RTHDR_TYPE_0:
+		 rhlen = (rh->ip6r_len + 1) << 3;
+#ifndef PULLDOWN_TEST
+		 IP6_EXTHDR_CHECK(m, off, rhlen, IPPROTO_DONE);
+#else
+		 IP6_EXTHDR_GET(rh, struct ip6_rthdr *, m, off, rhlen);
+		 if (rh == NULL) {
+			ip6stat.ip6s_tooshort++;
+			return IPPROTO_DONE;
+		 }
+#endif
+		 if (ip6_rthdr0(m, ip6, (struct ip6_rthdr0 *)rh))
+			 return(IPPROTO_DONE);
+		 break;
+	 default:
+		 /* unknown routing type */
+		 if (rh->ip6r_segleft == 0) {
+			 rhlen = (rh->ip6r_len + 1) << 3;
+			 break;	/* Final dst. Just ignore the header. */
+		 }
+		 ip6stat.ip6s_badoptions++;
+		 icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
+			     (caddr_t)&rh->ip6r_type - (caddr_t)ip6);
+		 return(IPPROTO_DONE);
+	}
+
+	*offp += rhlen;
+	return(rh->ip6r_nxt);
+}
+
+/*
+ * Type0 routing header processing
+ */
+static int
+ip6_rthdr0(m, ip6, rh0)
+	struct mbuf *m;
+	struct ip6_hdr *ip6;
+	struct ip6_rthdr0 *rh0;
+{
+	int addrs, index;
+	struct in6_addr *nextaddr, tmpaddr;
+
+	if (rh0->ip6r0_segleft == 0)
+		return(0);
+
+	if (rh0->ip6r0_len % 2
+#ifdef COMPAT_RFC1883
+	    || rh0->ip6r0_len > 46
+#endif
+		) {
+		/*
+		 * Type 0 routing header can't contain more than 23 addresses.
+		 * RFC 2462: this limitation was removed since stict/loose
+		 * bitmap field was deleted.
+		 */
+		ip6stat.ip6s_badoptions++;
+		icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
+			    (caddr_t)&rh0->ip6r0_len - (caddr_t)ip6);
+		return(-1);
+	}
+
+	if ((addrs = rh0->ip6r0_len / 2) < rh0->ip6r0_segleft) {
+		ip6stat.ip6s_badoptions++;
+		icmp6_error(m, ICMP6_PARAM_PROB, ICMP6_PARAMPROB_HEADER,
+			    (caddr_t)&rh0->ip6r0_segleft - (caddr_t)ip6);
+		return(-1);
+	}
+
+	index = addrs - rh0->ip6r0_segleft;
+	rh0->ip6r0_segleft--;
+	nextaddr = rh0->ip6r0_addr + index;
+
+	if (IN6_IS_ADDR_MULTICAST(nextaddr) ||
+	    IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
+		ip6stat.ip6s_badoptions++;
+		m_freem(m);
+		return(-1);
+	}
+
+	/*
+	 * Swap the IPv6 destination address and nextaddr. Forward the packet.
+	 */
+	tmpaddr = *nextaddr;
+	*nextaddr = ip6->ip6_dst;
+	if (IN6_IS_ADDR_LINKLOCAL(nextaddr))
+		nextaddr->s6_addr16[1] = 0;
+	ip6->ip6_dst = tmpaddr;
+	if (IN6_IS_ADDR_LINKLOCAL(&ip6->ip6_dst))
+		ip6->ip6_dst.s6_addr16[1] = htons(m->m_pkthdr.rcvif->if_index);
+
+#ifdef COMPAT_RFC1883
+	if (rh0->ip6r0_slmap[index / 8] & (1 << (7 - (index % 8))))
+		ip6_forward(m, IPV6_SRCRT_NEIGHBOR);
+	else
+		ip6_forward(m, IPV6_SRCRT_NOTNEIGHBOR);
+#else
+	ip6_forward(m, 1);
+#endif
+    
+	return(-1);			/* m would be freed in ip6_forward() */
+}