mirror of
https://github.com/freebsd/freebsd-src
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![Joseph Mingrone](/assets/img/avatar_default.png)
Local changes: - Update some local modifications to fix build - Synch config.h with upstream as much as possible Changelog: https://git.tcpdump.org/tcpdump/blob/55bc126b0216cfe409b8d6bd378f65679d136ddf:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/tcpdump-4.99.4.tar.gz Sponsored by: The FreeBSD Foundation
185 lines
5.8 KiB
C
185 lines
5.8 KiB
C
/*
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* Copyright (c) 1989, 1990, 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: IPv6 Routing Information Protocol (RIPng) printer */
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/* specification: RFC 2080 */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include "netdissect.h"
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#include "addrtoname.h"
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#include "extract.h"
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/*
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* Copyright (C) 1995, 1996, 1997 and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define RIP6_VERSION 1
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#define RIP6_REQUEST 1
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#define RIP6_RESPONSE 2
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struct netinfo6 {
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nd_ipv6 rip6_dest;
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nd_uint16_t rip6_tag;
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nd_uint8_t rip6_plen;
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nd_uint8_t rip6_metric;
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};
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struct rip6 {
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nd_uint8_t rip6_cmd;
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nd_uint8_t rip6_vers;
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nd_byte rip6_res1[2];
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struct netinfo6 rip6_nets[1];
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};
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#define HOPCNT_INFINITY6 16
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static int ND_IN6_IS_ADDR_UNSPECIFIED(const nd_ipv6 *addr)
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{
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static const nd_ipv6 in6addr_any_val = { 0 }; /* :: */
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return (memcmp(addr, &in6addr_any_val, sizeof(*addr)) == 0);
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}
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static void
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rip6_entry_print(netdissect_options *ndo,
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const struct netinfo6 *ni, const u_int print_metric)
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{
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uint16_t tag;
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uint8_t metric;
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ND_PRINT("%s/%u", GET_IP6ADDR_STRING(ni->rip6_dest),
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GET_U_1(ni->rip6_plen));
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tag = GET_BE_U_2(ni->rip6_tag);
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if (tag)
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ND_PRINT(" [%u]", tag);
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metric = GET_U_1(ni->rip6_metric);
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if (metric && print_metric)
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ND_PRINT(" (%u)", metric);
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}
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void
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ripng_print(netdissect_options *ndo, const u_char *dat, unsigned int length)
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{
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const struct rip6 *rp = (const struct rip6 *)dat;
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uint8_t cmd, vers;
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const struct netinfo6 *ni;
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unsigned int length_left;
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u_int j;
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ndo->ndo_protocol = "ripng";
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vers = GET_U_1(rp->rip6_vers);
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if (vers != RIP6_VERSION) {
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nd_print_protocol(ndo);
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ND_PRINT(" [version %u, must be %u]", vers, RIP6_VERSION);
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goto invalid;
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}
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cmd = GET_U_1(rp->rip6_cmd);
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switch (cmd) {
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case RIP6_REQUEST:
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length_left = length;
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if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6)))
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goto invalid;
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length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6));
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j = length_left / sizeof(*ni);
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if (j == 1) {
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if (GET_U_1(rp->rip6_nets->rip6_metric) == HOPCNT_INFINITY6
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&& ND_IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) {
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ND_PRINT(" ripng-req dump");
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break;
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}
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}
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if (j * sizeof(*ni) != length_left)
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ND_PRINT(" ripng-req %u[%u]:", j, length);
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else
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ND_PRINT(" ripng-req %u:", j);
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for (ni = rp->rip6_nets; length_left >= sizeof(*ni);
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length_left -= sizeof(*ni), ++ni) {
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if (ndo->ndo_vflag > 1)
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ND_PRINT("\n\t");
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else
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ND_PRINT(" ");
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rip6_entry_print(ndo, ni, FALSE);
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}
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if (length_left != 0)
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goto invalid;
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break;
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case RIP6_RESPONSE:
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length_left = length;
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if (length_left < (sizeof(struct rip6) - sizeof(struct netinfo6)))
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goto invalid;
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length_left -= (sizeof(struct rip6) - sizeof(struct netinfo6));
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j = length_left / sizeof(*ni);
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if (j * sizeof(*ni) != length_left)
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ND_PRINT(" ripng-resp %u[%u]:", j, length);
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else
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ND_PRINT(" ripng-resp %u:", j);
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for (ni = rp->rip6_nets; length_left >= sizeof(*ni);
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length_left -= sizeof(*ni), ++ni) {
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if (ndo->ndo_vflag > 1)
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ND_PRINT("\n\t");
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else
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ND_PRINT(" ");
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rip6_entry_print(ndo, ni, TRUE);
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}
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if (length_left != 0)
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goto invalid;
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break;
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default:
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ND_PRINT(" ripng-%u ?? %u", cmd, length);
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goto invalid;
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}
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return;
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invalid:
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nd_print_invalid(ndo);
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}
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