* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-ripng.c,v 1.8 2001-05-10 05:30:22 fenner Exp $";
-#endif
+/* \summary: IPv6 Routing Information Protocol (RIPng) printer */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* specification: RFC 2080 */
-#ifdef INET6
+#include <config.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <sys/socket.h>
+#include "netdissect-stdinc.h"
-#include <netinet/in.h>
+#include "netdissect.h"
+#include "addrtoname.h"
+#include "extract.h"
-#include <errno.h>
-#include <stdio.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
-#include "route6d.h"
-#include "interface.h"
-#include "addrtoname.h"
+#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];
+};
-static int
-rip6_entry_print(register const struct netinfo6 *ni, int metric)
+#define HOPCNT_INFINITY6 16
+
+static int ND_IN6_IS_ADDR_UNSPECIFIED(const nd_ipv6 *addr)
{
- int l;
- l = printf("%s/%d", ip6addr_string(&ni->rip6_dest), ni->rip6_plen);
- if (ni->rip6_tag)
- l += printf(" [%d]", ntohs(ni->rip6_tag));
- if (metric)
- l += printf(" (%d)", ni->rip6_metric);
- return l;
+ static const nd_ipv6 in6addr_any_val = { 0 }; /* :: */
+ return (memcmp(addr, &in6addr_any_val, sizeof(*addr)) == 0);
}
-void
-ripng_print(const u_char *dat, int length)
+static void
+rip6_entry_print(netdissect_options *ndo,
+ const struct netinfo6 *ni, const u_int print_metric)
{
- register const struct rip6 *rp = (struct rip6 *)dat;
- register const struct netinfo6 *ni;
- register int amt = snapend - dat;
- register int i = min(length, amt) -
- (sizeof(struct rip6) - sizeof(struct netinfo6));
- int j;
- int trunc;
+ uint16_t tag;
+ uint8_t metric;
- if (i < 0)
- return;
+ 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);
+}
- switch (rp->rip6_cmd) {
+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_protocol(ndo);
+ ND_PRINT(" [version %u, must be %u]", vers, RIP6_VERSION);
+ goto invalid;
+ }
+ cmd = GET_U_1(rp->rip6_cmd);
+ switch (cmd) {
case RIP6_REQUEST:
- j = length / sizeof(*ni);
- if (j == 1
- && rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6
- && IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
- printf(" ripng-req dump");
- break;
+ 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 - 4)
- printf(" ripng-req %d[%d]:", j, length);
+ if (j * sizeof(*ni) != length_left)
+ ND_PRINT(" ripng-req %u[%u]:", j, length);
else
- printf(" ripng-req %d:", j);
- trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
- for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
- if (vflag > 1)
- printf("\n\t");
+ 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
- printf(" ");
- rip6_entry_print(ni, 0);
+ ND_PRINT(" ");
+ rip6_entry_print(ndo, ni, FALSE);
}
+ if (length_left != 0)
+ goto invalid;
break;
case RIP6_RESPONSE:
- j = length / sizeof(*ni);
- if (j * sizeof(*ni) != length - 4)
- printf(" ripng-resp %d[%d]:", j, length);
+ 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
- printf(" ripng-resp %d:", j);
- trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i);
- for (ni = rp->rip6_nets; (i -= sizeof(*ni)) >= 0; ++ni) {
- if (vflag > 1)
- printf("\n\t");
+ 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
- printf(" ");
- rip6_entry_print(ni, ni->rip6_metric);
+ ND_PRINT(" ");
+ rip6_entry_print(ndo, ni, TRUE);
}
- if (trunc)
- printf("[|rip]");
+ if (length_left != 0)
+ goto invalid;
break;
default:
- printf(" ripng-%d ?? %d", rp->rip6_cmd, length);
- break;
+ ND_PRINT(" ripng-%u ?? %u", cmd, length);
+ goto invalid;
}
- if (rp->rip6_vers != RIP6_VERSION)
- printf(" [vers %d]", rp->rip6_vers);
+ return;
+
+invalid:
+ nd_print_invalid(ndo);
}
-#endif /* INET6 */
projects / tcpdump / blobdiff