print-ip6opts.c revision 146773
190075Sobrien/* 290075Sobrien * Copyright (C) 1998 WIDE Project. 390075Sobrien * All rights reserved. 490075Sobrien * 5132718Skan * Redistribution and use in source and binary forms, with or without 690075Sobrien * modification, are permitted provided that the following conditions 7132718Skan * are met: 890075Sobrien * 1. Redistributions of source code must retain the above copyright 990075Sobrien * notice, this list of conditions and the following disclaimer. 1090075Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1190075Sobrien * notice, this list of conditions and the following disclaimer in the 12132718Skan * documentation and/or other materials provided with the distribution. 1390075Sobrien * 3. Neither the name of the project nor the names of its contributors 1490075Sobrien * may be used to endorse or promote products derived from this software 1590075Sobrien * without specific prior written permission. 1690075Sobrien * 1790075Sobrien * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18132718Skan * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19169689Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20169689Skan * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2190075Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2290075Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifdef HAVE_CONFIG_H 31#include "config.h" 32#endif 33 34#ifndef lint 35static const char rcsid[] _U_ = 36 "@(#) $Header: /tcpdump/master/tcpdump/print-ip6opts.c,v 1.17 2003/11/19 00:36:08 guy Exp $"; 37#endif 38 39#ifdef INET6 40#include <tcpdump-stdinc.h> 41 42#include <stdio.h> 43 44#include "ip6.h" 45 46#include "interface.h" 47#include "addrtoname.h" 48#include "extract.h" 49 50/* items outside of rfc2292bis */ 51#ifndef IP6OPT_MINLEN 52#define IP6OPT_MINLEN 2 53#endif 54#ifndef IP6OPT_RTALERT_LEN 55#define IP6OPT_RTALERT_LEN 4 56#endif 57#ifndef IP6OPT_JUMBO_LEN 58#define IP6OPT_JUMBO_LEN 6 59#endif 60#define IP6OPT_HOMEADDR_MINLEN 18 61#define IP6OPT_BU_MINLEN 10 62#define IP6OPT_BA_MINLEN 13 63#define IP6OPT_BR_MINLEN 2 64#define IP6SOPT_UI 0x2 65#define IP6SOPT_UI_MINLEN 4 66#define IP6SOPT_ALTCOA 0x3 67#define IP6SOPT_ALTCOA_MINLEN 18 68#define IP6SOPT_AUTH 0x4 69#define IP6SOPT_AUTH_MINLEN 6 70 71static void ip6_sopt_print(const u_char *, int); 72 73static void 74ip6_sopt_print(const u_char *bp, int len) 75{ 76 int i; 77 int optlen; 78 79 for (i = 0; i < len; i += optlen) { 80 if (bp[i] == IP6OPT_PAD1) 81 optlen = 1; 82 else { 83 if (i + 1 < len) 84 optlen = bp[i + 1] + 2; 85 else 86 goto trunc; 87 } 88 if (i + optlen > len) 89 goto trunc; 90 91 switch (bp[i]) { 92 case IP6OPT_PAD1: 93 printf(", pad1"); 94 break; 95 case IP6OPT_PADN: 96 if (len - i < IP6OPT_MINLEN) { 97 printf(", padn: trunc"); 98 goto trunc; 99 } 100 printf(", padn"); 101 break; 102 case IP6SOPT_UI: 103 if (len - i < IP6SOPT_UI_MINLEN) { 104 printf(", ui: trunc"); 105 goto trunc; 106 } 107 printf(", ui: 0x%04x ", EXTRACT_16BITS(&bp[i + 2])); 108 break; 109 case IP6SOPT_ALTCOA: 110 if (len - i < IP6SOPT_ALTCOA_MINLEN) { 111 printf(", altcoa: trunc"); 112 goto trunc; 113 } 114 printf(", alt-CoA: %s", ip6addr_string(&bp[i+2])); 115 break; 116 case IP6SOPT_AUTH: 117 if (len - i < IP6SOPT_AUTH_MINLEN) { 118 printf(", auth: trunc"); 119 goto trunc; 120 } 121 printf(", auth spi: 0x%08x", EXTRACT_32BITS(&bp[i + 2])); 122 break; 123 default: 124 if (len - i < IP6OPT_MINLEN) { 125 printf(", sopt_type %d: trunc)", bp[i]); 126 goto trunc; 127 } 128 printf(", sopt_type 0x%02x: len=%d", bp[i], bp[i + 1]); 129 break; 130 } 131 } 132 return; 133 134trunc: 135 printf("[trunc] "); 136} 137 138void 139ip6_opt_print(const u_char *bp, int len) 140{ 141 int i; 142 int optlen = 0; 143 144 for (i = 0; i < len; i += optlen) { 145 if (bp[i] == IP6OPT_PAD1) 146 optlen = 1; 147 else { 148 if (i + 1 < len) 149 optlen = bp[i + 1] + 2; 150 else 151 goto trunc; 152 } 153 if (i + optlen > len) 154 goto trunc; 155 156 switch (bp[i]) { 157 case IP6OPT_PAD1: 158 printf("(pad1)"); 159 break; 160 case IP6OPT_PADN: 161 if (len - i < IP6OPT_MINLEN) { 162 printf("(padn: trunc)"); 163 goto trunc; 164 } 165 printf("(padn)"); 166 break; 167 case IP6OPT_ROUTER_ALERT: 168 if (len - i < IP6OPT_RTALERT_LEN) { 169 printf("(rtalert: trunc)"); 170 goto trunc; 171 } 172 if (bp[i + 1] != IP6OPT_RTALERT_LEN - 2) { 173 printf("(rtalert: invalid len %d)", bp[i + 1]); 174 goto trunc; 175 } 176 printf("(rtalert: 0x%04x) ", EXTRACT_16BITS(&bp[i + 2])); 177 break; 178 case IP6OPT_JUMBO: 179 if (len - i < IP6OPT_JUMBO_LEN) { 180 printf("(jumbo: trunc)"); 181 goto trunc; 182 } 183 if (bp[i + 1] != IP6OPT_JUMBO_LEN - 2) { 184 printf("(jumbo: invalid len %d)", bp[i + 1]); 185 goto trunc; 186 } 187 printf("(jumbo: %u) ", EXTRACT_32BITS(&bp[i + 2])); 188 break; 189 case IP6OPT_HOME_ADDRESS: 190 if (len - i < IP6OPT_HOMEADDR_MINLEN) { 191 printf("(homeaddr: trunc)"); 192 goto trunc; 193 } 194 if (bp[i + 1] < IP6OPT_HOMEADDR_MINLEN - 2) { 195 printf("(homeaddr: invalid len %d)", bp[i + 1]); 196 goto trunc; 197 } 198 printf("(homeaddr: %s", ip6addr_string(&bp[i + 2])); 199 if (bp[i + 1] > IP6OPT_HOMEADDR_MINLEN - 2) { 200 ip6_sopt_print(&bp[i + IP6OPT_HOMEADDR_MINLEN], 201 (optlen - IP6OPT_HOMEADDR_MINLEN)); 202 } 203 printf(")"); 204 break; 205 case IP6OPT_BINDING_UPDATE: 206 if (len - i < IP6OPT_BU_MINLEN) { 207 printf("(bu: trunc)"); 208 goto trunc; 209 } 210 if (bp[i + 1] < IP6OPT_BU_MINLEN - 2) { 211 printf("(bu: invalid len %d)", bp[i + 1]); 212 goto trunc; 213 } 214 printf("(bu: "); 215 if (bp[i + 2] & 0x80) 216 printf("A"); 217 if (bp[i + 2] & 0x40) 218 printf("H"); 219 if (bp[i + 2] & 0x20) 220 printf("S"); 221 if (bp[i + 2] & 0x10) 222 printf("D"); 223 if ((bp[i + 2] & 0x0f) || bp[i + 3] || bp[i + 4]) 224 printf("res"); 225 printf(", sequence: %u", bp[i + 5]); 226 printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 6])); 227 228 if (bp[i + 1] > IP6OPT_BU_MINLEN - 2) { 229 ip6_sopt_print(&bp[i + IP6OPT_BU_MINLEN], 230 (optlen - IP6OPT_BU_MINLEN)); 231 } 232 printf(")"); 233 break; 234 case IP6OPT_BINDING_ACK: 235 if (len - i < IP6OPT_BA_MINLEN) { 236 printf("(ba: trunc)"); 237 goto trunc; 238 } 239 if (bp[i + 1] < IP6OPT_BA_MINLEN - 2) { 240 printf("(ba: invalid len %d)", bp[i + 1]); 241 goto trunc; 242 } 243 printf("(ba: "); 244 printf("status: %u", bp[i + 2]); 245 if (bp[i + 3]) 246 printf("res"); 247 printf(", sequence: %u", bp[i + 4]); 248 printf(", lifetime: %u", EXTRACT_32BITS(&bp[i + 5])); 249 printf(", refresh: %u", EXTRACT_32BITS(&bp[i + 9])); 250 251 if (bp[i + 1] > IP6OPT_BA_MINLEN - 2) { 252 ip6_sopt_print(&bp[i + IP6OPT_BA_MINLEN], 253 (optlen - IP6OPT_BA_MINLEN)); 254 } 255 printf(")"); 256 break; 257 case IP6OPT_BINDING_REQ: 258 if (len - i < IP6OPT_BR_MINLEN) { 259 printf("(br: trunc)"); 260 goto trunc; 261 } 262 printf("(br"); 263 if (bp[i + 1] > IP6OPT_BR_MINLEN - 2) { 264 ip6_sopt_print(&bp[i + IP6OPT_BR_MINLEN], 265 (optlen - IP6OPT_BR_MINLEN)); 266 } 267 printf(")"); 268 break; 269 default: 270 if (len - i < IP6OPT_MINLEN) { 271 printf("(type %d: trunc)", bp[i]); 272 goto trunc; 273 } 274 printf("(opt_type 0x%02x: len=%d) ", bp[i], bp[i + 1]); 275 break; 276 } 277 } 278 279#if 0 280end: 281#endif 282 return; 283 284trunc: 285 printf("[trunc] "); 286} 287 288int 289hbhopt_print(register const u_char *bp) 290{ 291 const struct ip6_hbh *dp = (struct ip6_hbh *)bp; 292 register const u_char *ep; 293 int hbhlen = 0; 294 295 /* 'ep' points to the end of available data. */ 296 ep = snapend; 297 TCHECK(dp->ip6h_len); 298 hbhlen = (int)((dp->ip6h_len + 1) << 3); 299 TCHECK2(*dp, hbhlen); 300 printf("HBH "); 301 if (vflag) 302 ip6_opt_print((const u_char *)dp + sizeof(*dp), hbhlen - sizeof(*dp)); 303 304 return(hbhlen); 305 306 trunc: 307 fputs("[|HBH]", stdout); 308 return(-1); 309} 310 311int 312dstopt_print(register const u_char *bp) 313{ 314 const struct ip6_dest *dp = (struct ip6_dest *)bp; 315 register const u_char *ep; 316 int dstoptlen = 0; 317 318 /* 'ep' points to the end of available data. */ 319 ep = snapend; 320 TCHECK(dp->ip6d_len); 321 dstoptlen = (int)((dp->ip6d_len + 1) << 3); 322 TCHECK2(*dp, dstoptlen); 323 printf("DSTOPT "); 324 if (vflag) { 325 ip6_opt_print((const u_char *)dp + sizeof(*dp), 326 dstoptlen - sizeof(*dp)); 327 } 328 329 return(dstoptlen); 330 331 trunc: 332 fputs("[|DSTOPT]", stdout); 333 return(-1); 334} 335#endif /* INET6 */ 336