print-ripng.c revision 1.3.10.1
1 /* 2 * Copyright (c) 1989, 1990, 1991, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22 #include <sys/cdefs.h> 23 #ifndef lint 24 __RCSID("$NetBSD: print-ripng.c,v 1.3.10.1 2017/03/13 07:41:15 skrll Exp $"); 25 #endif 26 27 /* \summary: IPv6 Routing Information Protocol (RIPng) printer */ 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <netdissect-stdinc.h> 34 35 #include "netdissect.h" 36 #include "addrtoname.h" 37 #include "extract.h" 38 39 /* 40 * Copyright (C) 1995, 1996, 1997 and 1998 WIDE Project. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the project nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 #define RIP6_VERSION 1 68 69 #define RIP6_REQUEST 1 70 #define RIP6_RESPONSE 2 71 72 struct netinfo6 { 73 struct in6_addr rip6_dest; 74 uint16_t rip6_tag; 75 uint8_t rip6_plen; 76 uint8_t rip6_metric; 77 }; 78 79 struct rip6 { 80 uint8_t rip6_cmd; 81 uint8_t rip6_vers; 82 uint8_t rip6_res1[2]; 83 union { 84 struct netinfo6 ru6_nets[1]; 85 char ru6_tracefile[1]; 86 } rip6un; 87 #define rip6_nets rip6un.ru6_nets 88 #define rip6_tracefile rip6un.ru6_tracefile 89 }; 90 91 #define HOPCNT_INFINITY6 16 92 93 #if !defined(IN6_IS_ADDR_UNSPECIFIED) && !defined(_MSC_VER) /* MSVC inline */ 94 static int IN6_IS_ADDR_UNSPECIFIED(const struct in6_addr *addr) 95 { 96 static const struct in6_addr in6addr_any; /* :: */ 97 return (memcmp(addr, &in6addr_any, sizeof(*addr)) == 0); 98 } 99 #endif 100 101 static int 102 rip6_entry_print(netdissect_options *ndo, register const struct netinfo6 *ni, int metric) 103 { 104 int l; 105 l = ND_PRINT((ndo, "%s/%d", ip6addr_string(ndo, &ni->rip6_dest), ni->rip6_plen)); 106 if (ni->rip6_tag) 107 l += ND_PRINT((ndo, " [%d]", EXTRACT_16BITS(&ni->rip6_tag))); 108 if (metric) 109 l += ND_PRINT((ndo, " (%d)", ni->rip6_metric)); 110 return l; 111 } 112 113 void 114 ripng_print(netdissect_options *ndo, const u_char *dat, unsigned int length) 115 { 116 register const struct rip6 *rp = (const struct rip6 *)dat; 117 register const struct netinfo6 *ni; 118 register u_int amt; 119 register u_int i; 120 int j; 121 int trunc; 122 123 if (ndo->ndo_snapend < dat) 124 return; 125 amt = ndo->ndo_snapend - dat; 126 i = min(length, amt); 127 if (i < (sizeof(struct rip6) - sizeof(struct netinfo6))) 128 return; 129 i -= (sizeof(struct rip6) - sizeof(struct netinfo6)); 130 131 switch (rp->rip6_cmd) { 132 133 case RIP6_REQUEST: 134 j = length / sizeof(*ni); 135 if (j == 1 136 && rp->rip6_nets->rip6_metric == HOPCNT_INFINITY6 137 && IN6_IS_ADDR_UNSPECIFIED(&rp->rip6_nets->rip6_dest)) { 138 ND_PRINT((ndo, " ripng-req dump")); 139 break; 140 } 141 if (j * sizeof(*ni) != length - 4) 142 ND_PRINT((ndo, " ripng-req %d[%u]:", j, length)); 143 else 144 ND_PRINT((ndo, " ripng-req %d:", j)); 145 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); 146 for (ni = rp->rip6_nets; i >= sizeof(*ni); 147 i -= sizeof(*ni), ++ni) { 148 if (ndo->ndo_vflag > 1) 149 ND_PRINT((ndo, "\n\t")); 150 else 151 ND_PRINT((ndo, " ")); 152 rip6_entry_print(ndo, ni, 0); 153 } 154 break; 155 case RIP6_RESPONSE: 156 j = length / sizeof(*ni); 157 if (j * sizeof(*ni) != length - 4) 158 ND_PRINT((ndo, " ripng-resp %d[%u]:", j, length)); 159 else 160 ND_PRINT((ndo, " ripng-resp %d:", j)); 161 trunc = ((i / sizeof(*ni)) * sizeof(*ni) != i); 162 for (ni = rp->rip6_nets; i >= sizeof(*ni); 163 i -= sizeof(*ni), ++ni) { 164 if (ndo->ndo_vflag > 1) 165 ND_PRINT((ndo, "\n\t")); 166 else 167 ND_PRINT((ndo, " ")); 168 rip6_entry_print(ndo, ni, ni->rip6_metric); 169 } 170 if (trunc) 171 ND_PRINT((ndo, "[|ripng]")); 172 break; 173 default: 174 ND_PRINT((ndo, " ripng-%d ?? %u", rp->rip6_cmd, length)); 175 break; 176 } 177 if (rp->rip6_vers != RIP6_VERSION) 178 ND_PRINT((ndo, " [vers %d]", rp->rip6_vers)); 179 } 180
Indexes created Mon Mar 30 00:23:01 UTC 2026