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+/*
+ * Copyright (c) 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 Information Protocol (RIPng) printer */
+
+/* specification: RFC 2080 */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+/*
+ * 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.
+ */
+#define RIP6_VERSION 1
+
+#define RIP6_REQUEST 1
+#define RIP6_RESPONSE 2
+
+struct netinfo6 {
+ nd_ipv6 rip6_dest;
+ nd_uint16_t rip6_tag;
+ nd_uint8_t rip6_plen;
+ nd_uint8_t rip6_metric;
+};
+
+struct rip6 {
+ nd_uint8_t rip6_cmd;
+ nd_uint8_t rip6_vers;
+ nd_byte rip6_res1[2];
+ struct netinfo6 rip6_nets[1];
+};
+
+#define HOPCNT_INFINITY6 16
+
+static int ND_IN6_IS_ADDR_UNSPECIFIED(const nd_ipv6 *addr)
+{
+ static const nd_ipv6 in6addr_any_val = { 0 }; /* :: */
+ return (memcmp(addr, &in6addr_any_val, sizeof(*addr)) == 0);
+}
+
+static void
+rip6_entry_print(netdissect_options *ndo,
+ const struct netinfo6 *ni, const u_int print_metric)
+{
+ uint16_t tag;
+ uint8_t metric;
+
+ ND_PRINT("%s/%u", GET_IP6ADDR_STRING(ni->rip6_dest),
+ GET_U_1(ni->rip6_plen));
+ tag = GET_BE_U_2(ni->rip6_tag);
+ if (tag)
+ ND_PRINT(" [%u]", tag);
+ metric = GET_U_1(ni->rip6_metric);
+ if (metric && print_metric)
+ ND_PRINT(" (%u)", metric);
+}
+
+void
+ripng_print(netdissect_options *ndo, const u_char *dat, unsigned int length)
+{
+ const struct rip6 *rp = (const struct rip6 *)dat;
+ uint8_t cmd, vers;
+ const struct netinfo6 *ni;
+ unsigned int length_left;
+ u_int j;
+
+ ndo->ndo_protocol = "ripng";
+ vers = GET_U_1(rp->rip6_vers);
+ if (vers != RIP6_VERSION) {
+ ND_PRINT(" [vers %u]", vers);
+ goto invalid;
+ }
+ cmd = GET_U_1(rp->rip6_cmd);
+ switch (cmd) {
+
+ case RIP6_REQUEST:
+ length_left = length;
+ if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6)))
+ goto invalid;
+ length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6));
+ j = length_left / sizeof(*ni);
+ if (j == 1) {
+ if (GET_U_1(rp->rip6_nets->rip6_metric) == HOPCNT_INFINITY6
+ && ND_IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
+ ND_PRINT(" ripng-req dump");
+ break;
+ }
+ }
+ if (j * sizeof(*ni) != length_left)
+ ND_PRINT(" ripng-req %u[%u]:", j, length);
+ else
+ ND_PRINT(" ripng-req %u:", j);
+ for (ni = rp->rip6_nets; length_left >= sizeof(*ni);
+ length_left -= sizeof(*ni), ++ni) {
+ if (ndo->ndo_vflag > 1)
+ ND_PRINT("\n\t");
+ else
+ ND_PRINT(" ");
+ rip6_entry_print(ndo, ni, FALSE);
+ }
+ if (length_left != 0)
+ goto invalid;
+ break;
+ case RIP6_RESPONSE:
+ length_left = length;
+ if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6)))
+ goto invalid;
+ length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6));
+ j = length_left / sizeof(*ni);
+ if (j * sizeof(*ni) != length_left)
+ ND_PRINT(" ripng-resp %u[%u]:", j, length);
+ else
+ ND_PRINT(" ripng-resp %u:", j);
+ for (ni = rp->rip6_nets; length_left >= sizeof(*ni);
+ length_left -= sizeof(*ni), ++ni) {
+ if (ndo->ndo_vflag > 1)
+ ND_PRINT("\n\t");
+ else
+ ND_PRINT(" ");
+ rip6_entry_print(ndo, ni, TRUE);
+ }
+ if (length_left != 0)
+ goto invalid;
+ break;
+ default:
+ ND_PRINT(" ripng-%u ?? %u", cmd, length);
+ goto invalid;
+ }
+ return;
+
+invalid:
+ nd_print_invalid(ndo);
+}