KAME netinet6 basic part(no IPsec,no V6 Multicast Forwarding, no UDP/TCP

for IPv6 yet)

With this patch, you can assigne IPv6 addr automatically, and can reply to
IPv6 ping.

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project

1 files changed, 108 insertions, 0 deletions

diff --git a/sys/netinet6/dest6.c b/sys/netinet6/dest6.c
new file mode 100644
index 0000000..403ed5d
--- /dev/null
+++ b/sys/netinet6/dest6.c
@@ -0,0 +1,108 @@
+/*
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/domain.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <sys/time.h>
+#include <sys/kernel.h>
+
+#include <net/if.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+#include <netinet/in_var.h>
+#include <netinet6/ip6.h>
+#include <netinet6/ip6_var.h>
+#include <netinet6/icmp6.h>
+
+/*
+ * Destination options header processing.
+ */
+int
+dest6_input(mp, offp, proto)
+	struct mbuf **mp;
+	int *offp, proto;
+{
+	register struct mbuf *m = *mp;
+	int off = *offp, dstoptlen, optlen;
+	struct ip6_dest *dstopts;
+	u_int8_t *opt;
+
+	/* validation of the length of the header */
+	IP6_EXTHDR_CHECK(m, off, sizeof(*dstopts), IPPROTO_DONE);
+	dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
+	dstoptlen = (dstopts->ip6d_len + 1) << 3;
+
+	IP6_EXTHDR_CHECK(m, off, dstoptlen, IPPROTO_DONE);
+	dstopts = (struct ip6_dest *)(mtod(m, caddr_t) + off);
+	off += dstoptlen;
+	dstoptlen -= sizeof(struct ip6_dest);
+	opt = (u_int8_t *)dstopts + sizeof(struct ip6_dest);
+
+	/* search header for all options. */
+	for (optlen = 0; dstoptlen > 0; dstoptlen -= optlen, opt += optlen) {
+		switch(*opt) {
+		 case IP6OPT_PAD1:
+			 optlen = 1;
+			 break;
+		 case IP6OPT_PADN:
+			 if (dstoptlen < IP6OPT_MINLEN) {
+				 ip6stat.ip6s_toosmall++;
+				 goto bad;
+			 }
+			 optlen = *(opt + 1) + 2;
+			 break;
+		 default:		/* unknown option */
+			 if (dstoptlen < IP6OPT_MINLEN) {
+				 ip6stat.ip6s_toosmall++;
+				 goto bad;
+			 }
+			 if ((optlen = ip6_unknown_opt(opt, m,
+						       opt-mtod(m, u_int8_t *))) == -1)
+				 return(IPPROTO_DONE);
+			 optlen += 2;
+			 break;
+		}
+	}
+
+	*offp = off;
+	return(dstopts->ip6d_nxt);
+
+  bad:
+	m_freem(m);
+	return(IPPROTO_DONE);
+}