1 files changed, 115 insertions, 0 deletions
diff --git a/print-rt6.c b/print-rt6.c
new file mode 100644
index 0000000..096a962
--- /dev/null
+++ b/print-rt6.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: IPv6 routing header printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+#include "ip6.h"
+
+int
+rt6_print(netdissect_options *ndo, const u_char *bp, const u_char *bp2 _U_)
+{
+	const struct ip6_rthdr *dp;
+	const struct ip6_rthdr0 *dp0;
+	const struct ip6_srh *srh;
+	u_int i, len, type;
+	const u_char *p;
+
+	ndo->ndo_protocol = "rt6";
+
+	nd_print_protocol_caps(ndo);
+	dp = (const struct ip6_rthdr *)bp;
+
+	len = GET_U_1(dp->ip6r_len);
+	ND_PRINT(" (len=%u", len);	/*)*/
+	type = GET_U_1(dp->ip6r_type);
+	ND_PRINT(", type=%u", type);
+	if (type == IPV6_RTHDR_TYPE_0)
+		ND_PRINT(" [Deprecated]");
+	ND_PRINT(", segleft=%u", GET_U_1(dp->ip6r_segleft));
+
+	switch (type) {
+	case IPV6_RTHDR_TYPE_0:
+	case IPV6_RTHDR_TYPE_2:			/* Mobile IPv6 ID-20 */
+		dp0 = (const struct ip6_rthdr0 *)dp;
+
+		if (GET_BE_U_4(dp0->ip6r0_reserved) || ndo->ndo_vflag) {
+			ND_PRINT(", rsv=0x%0x",
+			    GET_BE_U_4(dp0->ip6r0_reserved));
+		}
+
+		if (len % 2 == 1) {
+			ND_PRINT(" (invalid length %u)", len);
+			goto invalid;
+		}
+		len >>= 1;
+		p = (const u_char *) dp0->ip6r0_addr;
+		for (i = 0; i < len; i++) {
+			ND_PRINT(", [%u]%s", i, GET_IP6ADDR_STRING(p));
+			p += 16;
+		}
+		/*(*/
+		ND_PRINT(") ");
+		return((GET_U_1(dp0->ip6r0_len) + 1) << 3);
+		break;
+	case IPV6_RTHDR_TYPE_4:
+		srh = (const struct ip6_srh *)dp;
+		ND_PRINT(", last-entry=%u", GET_U_1(srh->srh_last_ent));
+
+		if (GET_U_1(srh->srh_flags) || ndo->ndo_vflag) {
+			ND_PRINT(", flags=0x%0x",
+				GET_U_1(srh->srh_flags));
+		}
+
+		ND_PRINT(", tag=%x", GET_BE_U_2(srh->srh_tag));
+
+		if (len % 2 == 1) {
+			ND_PRINT(" (invalid length %u)", len);
+			goto invalid;
+		}
+		len >>= 1;
+		p  = (const u_char *) srh->srh_segments;
+		for (i = 0; i < len; i++) {
+			ND_PRINT(", [%u]%s", i, GET_IP6ADDR_STRING(p));
+			p += 16;
+		}
+		/*(*/
+		ND_PRINT(") ");
+		return((GET_U_1(srh->srh_len) + 1) << 3);
+		break;
+	default:
+		ND_PRINT(" (unknown type)");
+		goto invalid;
+	}
+
+invalid:
+	nd_print_invalid(ndo);
+	return -1;
+}