| /* |
| * 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_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: |
| 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); |
| } |