1 /* 2 * Copyright (c) 2007-2011 Grgoire Henry, Juliusz Chroboczek 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. Neither the name of the project nor the names of its contributors 13 * may be used to endorse or promote products derived from this software 14 * without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /* \summary: Babel Routing Protocol printer */ 30 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 35 #include <netdissect-stdinc.h> 36 37 #include <stdio.h> 38 #include <string.h> 39 40 #include "netdissect.h" 41 #include "addrtoname.h" 42 #include "extract.h" 43 44 static const char tstr[] = "[|babel]"; 45 46 static void babel_print_v2(netdissect_options *, const u_char *cp, u_int length); 47 48 void 49 babel_print(netdissect_options *ndo, 50 const u_char *cp, u_int length) 51 { 52 ND_PRINT((ndo, "babel")); 53 54 ND_TCHECK2(*cp, 4); 55 56 if(cp[0] != 42) { 57 ND_PRINT((ndo, " invalid header")); 58 return; 59 } else { 60 ND_PRINT((ndo, " %d", cp[1])); 61 } 62 63 switch(cp[1]) { 64 case 2: 65 babel_print_v2(ndo, cp, length); 66 break; 67 default: 68 ND_PRINT((ndo, " unknown version")); 69 break; 70 } 71 72 return; 73 74 trunc: 75 ND_PRINT((ndo, " %s", tstr)); 76 return; 77 } 78 79 /* TLVs */ 80 #define MESSAGE_PAD1 0 81 #define MESSAGE_PADN 1 82 #define MESSAGE_ACK_REQ 2 83 #define MESSAGE_ACK 3 84 #define MESSAGE_HELLO 4 85 #define MESSAGE_IHU 5 86 #define MESSAGE_ROUTER_ID 6 87 #define MESSAGE_NH 7 88 #define MESSAGE_UPDATE 8 89 #define MESSAGE_REQUEST 9 90 #define MESSAGE_MH_REQUEST 10 91 #define MESSAGE_TSPC 11 92 #define MESSAGE_HMAC 12 93 #define MESSAGE_UPDATE_SRC_SPECIFIC 13 94 #define MESSAGE_REQUEST_SRC_SPECIFIC 14 95 #define MESSAGE_MH_REQUEST_SRC_SPECIFIC 15 96 97 /* sub-TLVs */ 98 #define MESSAGE_SUB_PAD1 0 99 #define MESSAGE_SUB_PADN 1 100 #define MESSAGE_SUB_DIVERSITY 2 101 #define MESSAGE_SUB_TIMESTAMP 3 102 103 /* Diversity sub-TLV channel codes */ 104 static const struct tok diversity_str[] = { 105 { 0, "reserved" }, 106 { 255, "all" }, 107 { 0, NULL } 108 }; 109 110 static const char * 111 format_id(const u_char *id) 112 { 113 static char buf[25]; 114 snprintf(buf, 25, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", 115 id[0], id[1], id[2], id[3], id[4], id[5], id[6], id[7]); 116 buf[24] = '\0'; 117 return buf; 118 } 119 120 static const unsigned char v4prefix[16] = 121 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 }; 122 123 static const char * 124 format_prefix(netdissect_options *ndo, const u_char *prefix, unsigned char plen) 125 { 126 static char buf[50]; 127 if(plen >= 96 && memcmp(prefix, v4prefix, 12) == 0) 128 snprintf(buf, 50, "%s/%u", ipaddr_string(ndo, prefix + 12), plen - 96); 129 else 130 snprintf(buf, 50, "%s/%u", ip6addr_string(ndo, prefix), plen); 131 buf[49] = '\0'; 132 return buf; 133 } 134 135 static const char * 136 format_address(netdissect_options *ndo, const u_char *prefix) 137 { 138 if(memcmp(prefix, v4prefix, 12) == 0) 139 return ipaddr_string(ndo, prefix + 12); 140 else 141 return ip6addr_string(ndo, prefix); 142 } 143 144 static const char * 145 format_interval(const uint16_t i) 146 { 147 static char buf[sizeof("000.00s")]; 148 149 if (i == 0) 150 return "0.0s (bogus)"; 151 snprintf(buf, sizeof(buf), "%u.%02us", i / 100, i % 100); 152 return buf; 153 } 154 155 static const char * 156 format_interval_update(const uint16_t i) 157 { 158 return i == 0xFFFF ? "infinity" : format_interval(i); 159 } 160 161 static const char * 162 format_timestamp(const uint32_t i) 163 { 164 static char buf[sizeof("0000.000000s")]; 165 snprintf(buf, sizeof(buf), "%u.%06us", i / 1000000, i % 1000000); 166 return buf; 167 } 168 169 /* Return number of octets consumed from the input buffer (not the prefix length 170 * in bytes), or -1 for encoding error. */ 171 static int 172 network_prefix(int ae, int plen, unsigned int omitted, 173 const unsigned char *p, const unsigned char *dp, 174 unsigned int len, unsigned char *p_r) 175 { 176 unsigned pb; 177 unsigned char prefix[16]; 178 int consumed = 0; 179 180 if(plen >= 0) 181 pb = (plen + 7) / 8; 182 else if(ae == 1) 183 pb = 4; 184 else 185 pb = 16; 186 187 if(pb > 16) 188 return -1; 189 190 memset(prefix, 0, 16); 191 192 switch(ae) { 193 case 0: break; 194 case 1: 195 if(omitted > 4 || pb > 4 || (pb > omitted && len < pb - omitted)) 196 return -1; 197 memcpy(prefix, v4prefix, 12); 198 if(omitted) { 199 if (dp == NULL) return -1; 200 memcpy(prefix, dp, 12 + omitted); 201 } 202 if(pb > omitted) { 203 memcpy(prefix + 12 + omitted, p, pb - omitted); 204 consumed = pb - omitted; 205 } 206 break; 207 case 2: 208 if(omitted > 16 || (pb > omitted && len < pb - omitted)) 209 return -1; 210 if(omitted) { 211 if (dp == NULL) return -1; 212 memcpy(prefix, dp, omitted); 213 } 214 if(pb > omitted) { 215 memcpy(prefix + omitted, p, pb - omitted); 216 consumed = pb - omitted; 217 } 218 break; 219 case 3: 220 if(pb > 8 && len < pb - 8) return -1; 221 prefix[0] = 0xfe; 222 prefix[1] = 0x80; 223 if(pb > 8) { 224 memcpy(prefix + 8, p, pb - 8); 225 consumed = pb - 8; 226 } 227 break; 228 default: 229 return -1; 230 } 231 232 memcpy(p_r, prefix, 16); 233 return consumed; 234 } 235 236 static int 237 network_address(int ae, const unsigned char *a, unsigned int len, 238 unsigned char *a_r) 239 { 240 return network_prefix(ae, -1, 0, a, NULL, len, a_r); 241 } 242 243 /* 244 * Sub-TLVs consume the "extra data" of Babel TLVs (see Section 4.3 of RFC6126), 245 * their encoding is similar to the encoding of TLVs, but the type namespace is 246 * different: 247 * 248 * o Type 0 stands for Pad1 sub-TLV with the same encoding as the Pad1 TLV. 249 * o Type 1 stands for PadN sub-TLV with the same encoding as the PadN TLV. 250 * o Type 2 stands for Diversity sub-TLV, which propagates diversity routing 251 * data. Its body is a variable-length sequence of 8-bit unsigned integers, 252 * each representing per-hop number of interferring radio channel for the 253 * prefix. Channel 0 is invalid and must not be used in the sub-TLV, channel 254 * 255 interferes with any other channel. 255 * o Type 3 stands for Timestamp sub-TLV, used to compute RTT between 256 * neighbours. In the case of a Hello TLV, the body stores a 32-bits 257 * timestamp, while in the case of a IHU TLV, two 32-bits timestamps are 258 * stored. 259 * 260 * Sub-TLV types 0 and 1 are valid for any TLV type, whether sub-TLV type 2 is 261 * only valid for TLV type 8 (Update). Note that within an Update TLV a missing 262 * Diversity sub-TLV is not the same as a Diversity sub-TLV with an empty body. 263 * The former would mean a lack of any claims about the interference, and the 264 * latter would state that interference is definitely absent. 265 * A type 3 sub-TLV is valid both for Hello and IHU TLVs, though the exact 266 * semantic of the sub-TLV is different in each case. 267 */ 268 static void 269 subtlvs_print(netdissect_options *ndo, 270 const u_char *cp, const u_char *ep, const uint8_t tlv_type) 271 { 272 uint8_t subtype, sublen; 273 const char *sep; 274 uint32_t t1, t2; 275 276 while (cp < ep) { 277 subtype = *cp++; 278 if(subtype == MESSAGE_SUB_PAD1) { 279 ND_PRINT((ndo, " sub-pad1")); 280 continue; 281 } 282 if(cp == ep) 283 goto invalid; 284 sublen = *cp++; 285 if(cp + sublen > ep) 286 goto invalid; 287 288 switch(subtype) { 289 case MESSAGE_SUB_PADN: 290 ND_PRINT((ndo, " sub-padn")); 291 cp += sublen; 292 break; 293 case MESSAGE_SUB_DIVERSITY: 294 ND_PRINT((ndo, " sub-diversity")); 295 if (sublen == 0) { 296 ND_PRINT((ndo, " empty")); 297 break; 298 } 299 sep = " "; 300 while(sublen--) { 301 ND_PRINT((ndo, "%s%s", sep, tok2str(diversity_str, "%u", *cp++))); 302 sep = "-"; 303 } 304 if(tlv_type != MESSAGE_UPDATE && 305 tlv_type != MESSAGE_UPDATE_SRC_SPECIFIC) 306 ND_PRINT((ndo, " (bogus)")); 307 break; 308 case MESSAGE_SUB_TIMESTAMP: 309 ND_PRINT((ndo, " sub-timestamp")); 310 if(tlv_type == MESSAGE_HELLO) { 311 if(sublen < 4) 312 goto invalid; 313 t1 = EXTRACT_32BITS(cp); 314 ND_PRINT((ndo, " %s", format_timestamp(t1))); 315 } else if(tlv_type == MESSAGE_IHU) { 316 if(sublen < 8) 317 goto invalid; 318 t1 = EXTRACT_32BITS(cp); 319 ND_PRINT((ndo, " %s", format_timestamp(t1))); 320 t2 = EXTRACT_32BITS(cp + 4); 321 ND_PRINT((ndo, "|%s", format_timestamp(t2))); 322 } else 323 ND_PRINT((ndo, " (bogus)")); 324 cp += sublen; 325 break; 326 default: 327 ND_PRINT((ndo, " sub-unknown-0x%02x", subtype)); 328 cp += sublen; 329 } /* switch */ 330 } /* while */ 331 return; 332 333 invalid: 334 ND_PRINT((ndo, "%s", istr)); 335 } 336 337 #define ICHECK(i, l) \ 338 if ((i) + (l) > bodylen || (i) + (l) > length) goto invalid; 339 340 static void 341 babel_print_v2(netdissect_options *ndo, 342 const u_char *cp, u_int length) 343 { 344 u_int i; 345 u_short bodylen; 346 u_char v4_prefix[16] = 347 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 }; 348 u_char v6_prefix[16] = {0}; 349 350 ND_TCHECK2(*cp, 4); 351 if (length < 4) 352 goto invalid; 353 bodylen = EXTRACT_16BITS(cp + 2); 354 ND_PRINT((ndo, " (%u)", bodylen)); 355 356 /* Process the TLVs in the body */ 357 i = 0; 358 while(i < bodylen) { 359 const u_char *message; 360 u_int type, len; 361 362 message = cp + 4 + i; 363 364 ND_TCHECK2(*message, 1); 365 if((type = message[0]) == MESSAGE_PAD1) { 366 ND_PRINT((ndo, ndo->ndo_vflag ? "\n\tPad 1" : " pad1")); 367 i += 1; 368 continue; 369 } 370 371 ND_TCHECK2(*message, 2); 372 ICHECK(i, 2); 373 len = message[1]; 374 375 ND_TCHECK2(*message, 2 + len); 376 ICHECK(i, 2 + len); 377 378 switch(type) { 379 case MESSAGE_PADN: { 380 if (!ndo->ndo_vflag) 381 ND_PRINT((ndo, " padN")); 382 else 383 ND_PRINT((ndo, "\n\tPad %d", len + 2)); 384 } 385 break; 386 387 case MESSAGE_ACK_REQ: { 388 u_short nonce, interval; 389 if (!ndo->ndo_vflag) 390 ND_PRINT((ndo, " ack-req")); 391 else { 392 ND_PRINT((ndo, "\n\tAcknowledgment Request ")); 393 if(len < 6) goto invalid; 394 nonce = EXTRACT_16BITS(message + 4); 395 interval = EXTRACT_16BITS(message + 6); 396 ND_PRINT((ndo, "%04x %s", nonce, format_interval(interval))); 397 } 398 } 399 break; 400 401 case MESSAGE_ACK: { 402 u_short nonce; 403 if (!ndo->ndo_vflag) 404 ND_PRINT((ndo, " ack")); 405 else { 406 ND_PRINT((ndo, "\n\tAcknowledgment ")); 407 if(len < 2) goto invalid; 408 nonce = EXTRACT_16BITS(message + 2); 409 ND_PRINT((ndo, "%04x", nonce)); 410 } 411 } 412 break; 413 414 case MESSAGE_HELLO: { 415 u_short seqno, interval; 416 if (!ndo->ndo_vflag) 417 ND_PRINT((ndo, " hello")); 418 else { 419 ND_PRINT((ndo, "\n\tHello ")); 420 if(len < 6) goto invalid; 421 seqno = EXTRACT_16BITS(message + 4); 422 interval = EXTRACT_16BITS(message + 6); 423 ND_PRINT((ndo, "seqno %u interval %s", seqno, format_interval(interval))); 424 /* Extra data. */ 425 if(len > 6) 426 subtlvs_print(ndo, message + 8, message + 2 + len, type); 427 } 428 } 429 break; 430 431 case MESSAGE_IHU: { 432 unsigned short txcost, interval; 433 if (!ndo->ndo_vflag) 434 ND_PRINT((ndo, " ihu")); 435 else { 436 u_char address[16]; 437 int rc; 438 ND_PRINT((ndo, "\n\tIHU ")); 439 if(len < 6) goto invalid; 440 txcost = EXTRACT_16BITS(message + 4); 441 interval = EXTRACT_16BITS(message + 6); 442 rc = network_address(message[2], message + 8, len - 6, address); 443 if(rc < 0) { ND_PRINT((ndo, "%s", tstr)); break; } 444 ND_PRINT((ndo, "%s txcost %u interval %s", 445 format_address(ndo, address), txcost, format_interval(interval))); 446 /* Extra data. */ 447 if((u_int)rc < len - 6) 448 subtlvs_print(ndo, message + 8 + rc, message + 2 + len, 449 type); 450 } 451 } 452 break; 453 454 case MESSAGE_ROUTER_ID: { 455 if (!ndo->ndo_vflag) 456 ND_PRINT((ndo, " router-id")); 457 else { 458 ND_PRINT((ndo, "\n\tRouter Id")); 459 if(len < 10) goto invalid; 460 ND_PRINT((ndo, " %s", format_id(message + 4))); 461 } 462 } 463 break; 464 465 case MESSAGE_NH: { 466 if (!ndo->ndo_vflag) 467 ND_PRINT((ndo, " nh")); 468 else { 469 int rc; 470 u_char nh[16]; 471 ND_PRINT((ndo, "\n\tNext Hop")); 472 if(len < 2) goto invalid; 473 rc = network_address(message[2], message + 4, len - 2, nh); 474 if(rc < 0) goto invalid; 475 ND_PRINT((ndo, " %s", format_address(ndo, nh))); 476 } 477 } 478 break; 479 480 case MESSAGE_UPDATE: { 481 if (!ndo->ndo_vflag) { 482 ND_PRINT((ndo, " update")); 483 if(len < 1) 484 ND_PRINT((ndo, "/truncated")); 485 else 486 ND_PRINT((ndo, "%s%s%s", 487 (message[3] & 0x80) ? "/prefix": "", 488 (message[3] & 0x40) ? "/id" : "", 489 (message[3] & 0x3f) ? "/unknown" : "")); 490 } else { 491 u_short interval, seqno, metric; 492 u_char plen; 493 int rc; 494 u_char prefix[16]; 495 ND_PRINT((ndo, "\n\tUpdate")); 496 if(len < 10) goto invalid; 497 plen = message[4] + (message[2] == 1 ? 96 : 0); 498 rc = network_prefix(message[2], message[4], message[5], 499 message + 12, 500 message[2] == 1 ? v4_prefix : v6_prefix, 501 len - 10, prefix); 502 if(rc < 0) goto invalid; 503 interval = EXTRACT_16BITS(message + 6); 504 seqno = EXTRACT_16BITS(message + 8); 505 metric = EXTRACT_16BITS(message + 10); 506 ND_PRINT((ndo, "%s%s%s %s metric %u seqno %u interval %s", 507 (message[3] & 0x80) ? "/prefix": "", 508 (message[3] & 0x40) ? "/id" : "", 509 (message[3] & 0x3f) ? "/unknown" : "", 510 format_prefix(ndo, prefix, plen), 511 metric, seqno, format_interval_update(interval))); 512 if(message[3] & 0x80) { 513 if(message[2] == 1) 514 memcpy(v4_prefix, prefix, 16); 515 else 516 memcpy(v6_prefix, prefix, 16); 517 } 518 /* extra data? */ 519 if((u_int)rc < len - 10) 520 subtlvs_print(ndo, message + 12 + rc, message + 2 + len, type); 521 } 522 } 523 break; 524 525 case MESSAGE_REQUEST: { 526 if (!ndo->ndo_vflag) 527 ND_PRINT((ndo, " request")); 528 else { 529 int rc; 530 u_char prefix[16], plen; 531 ND_PRINT((ndo, "\n\tRequest ")); 532 if(len < 2) goto invalid; 533 plen = message[3] + (message[2] == 1 ? 96 : 0); 534 rc = network_prefix(message[2], message[3], 0, 535 message + 4, NULL, len - 2, prefix); 536 if(rc < 0) goto invalid; 537 ND_PRINT((ndo, "for %s", 538 message[2] == 0 ? "any" : format_prefix(ndo, prefix, plen))); 539 } 540 } 541 break; 542 543 case MESSAGE_MH_REQUEST : { 544 if (!ndo->ndo_vflag) 545 ND_PRINT((ndo, " mh-request")); 546 else { 547 int rc; 548 u_short seqno; 549 u_char prefix[16], plen; 550 ND_PRINT((ndo, "\n\tMH-Request ")); 551 if(len < 14) goto invalid; 552 seqno = EXTRACT_16BITS(message + 4); 553 rc = network_prefix(message[2], message[3], 0, 554 message + 16, NULL, len - 14, prefix); 555 if(rc < 0) goto invalid; 556 plen = message[3] + (message[2] == 1 ? 96 : 0); 557 ND_PRINT((ndo, "(%u hops) for %s seqno %u id %s", 558 message[6], format_prefix(ndo, prefix, plen), 559 seqno, format_id(message + 8))); 560 } 561 } 562 break; 563 case MESSAGE_TSPC : 564 if (!ndo->ndo_vflag) 565 ND_PRINT((ndo, " tspc")); 566 else { 567 ND_PRINT((ndo, "\n\tTS/PC ")); 568 if(len < 6) goto invalid; 569 ND_PRINT((ndo, "timestamp %u packetcounter %u", EXTRACT_32BITS (message + 4), 570 EXTRACT_16BITS(message + 2))); 571 } 572 break; 573 case MESSAGE_HMAC : { 574 if (!ndo->ndo_vflag) 575 ND_PRINT((ndo, " hmac")); 576 else { 577 unsigned j; 578 ND_PRINT((ndo, "\n\tHMAC ")); 579 if(len < 18) goto invalid; 580 ND_PRINT((ndo, "key-id %u digest-%u ", EXTRACT_16BITS(message + 2), len - 2)); 581 for (j = 0; j < len - 2; j++) 582 ND_PRINT((ndo, "%02X", message[4 + j])); 583 } 584 } 585 break; 586 587 case MESSAGE_UPDATE_SRC_SPECIFIC : { 588 if(!ndo->ndo_vflag) { 589 ND_PRINT((ndo, " ss-update")); 590 } else { 591 u_char prefix[16], src_prefix[16]; 592 u_short interval, seqno, metric; 593 u_char ae, plen, src_plen, omitted; 594 int rc; 595 int parsed_len = 10; 596 ND_PRINT((ndo, "\n\tSS-Update")); 597 if(len < 10) goto invalid; 598 ae = message[2]; 599 src_plen = message[3]; 600 plen = message[4]; 601 omitted = message[5]; 602 interval = EXTRACT_16BITS(message + 6); 603 seqno = EXTRACT_16BITS(message + 8); 604 metric = EXTRACT_16BITS(message + 10); 605 rc = network_prefix(ae, plen, omitted, message + 2 + parsed_len, 606 ae == 1 ? v4_prefix : v6_prefix, 607 len - parsed_len, prefix); 608 if(rc < 0) goto invalid; 609 if(ae == 1) 610 plen += 96; 611 parsed_len += rc; 612 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 613 NULL, len - parsed_len, src_prefix); 614 if(rc < 0) goto invalid; 615 if(ae == 1) 616 src_plen += 96; 617 parsed_len += rc; 618 619 ND_PRINT((ndo, " %s from", format_prefix(ndo, prefix, plen))); 620 ND_PRINT((ndo, " %s metric %u seqno %u interval %s", 621 format_prefix(ndo, src_prefix, src_plen), 622 metric, seqno, format_interval_update(interval))); 623 /* extra data? */ 624 if((u_int)parsed_len < len) 625 subtlvs_print(ndo, message + 2 + parsed_len, 626 message + 2 + len, type); 627 } 628 } 629 break; 630 631 case MESSAGE_REQUEST_SRC_SPECIFIC : { 632 if(!ndo->ndo_vflag) 633 ND_PRINT((ndo, " ss-request")); 634 else { 635 int rc, parsed_len = 3; 636 u_char ae, plen, src_plen, prefix[16], src_prefix[16]; 637 ND_PRINT((ndo, "\n\tSS-Request ")); 638 if(len < 3) goto invalid; 639 ae = message[2]; 640 plen = message[3]; 641 src_plen = message[4]; 642 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 643 NULL, len - parsed_len, prefix); 644 if(rc < 0) goto invalid; 645 if(ae == 1) 646 plen += 96; 647 parsed_len += rc; 648 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 649 NULL, len - parsed_len, src_prefix); 650 if(rc < 0) goto invalid; 651 if(ae == 1) 652 src_plen += 96; 653 parsed_len += rc; 654 if(ae == 0) { 655 ND_PRINT((ndo, "for any")); 656 } else { 657 ND_PRINT((ndo, "for (%s, ", format_prefix(ndo, prefix, plen))); 658 ND_PRINT((ndo, "%s)", format_prefix(ndo, src_prefix, src_plen))); 659 } 660 } 661 } 662 break; 663 664 case MESSAGE_MH_REQUEST_SRC_SPECIFIC : { 665 if(!ndo->ndo_vflag) 666 ND_PRINT((ndo, " ss-mh-request")); 667 else { 668 int rc, parsed_len = 14; 669 u_short seqno; 670 u_char ae, plen, src_plen, prefix[16], src_prefix[16], hopc; 671 const u_char *router_id = NULL; 672 ND_PRINT((ndo, "\n\tSS-MH-Request ")); 673 if(len < 14) goto invalid; 674 ae = message[2]; 675 plen = message[3]; 676 seqno = EXTRACT_16BITS(message + 4); 677 hopc = message[6]; 678 src_plen = message[7]; 679 router_id = message + 8; 680 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 681 NULL, len - parsed_len, prefix); 682 if(rc < 0) goto invalid; 683 if(ae == 1) 684 plen += 96; 685 parsed_len += rc; 686 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 687 NULL, len - parsed_len, src_prefix); 688 if(rc < 0) goto invalid; 689 if(ae == 1) 690 src_plen += 96; 691 ND_PRINT((ndo, "(%u hops) for (%s, ", 692 hopc, format_prefix(ndo, prefix, plen))); 693 ND_PRINT((ndo, "%s) seqno %u id %s", 694 format_prefix(ndo, src_prefix, src_plen), 695 seqno, format_id(router_id))); 696 } 697 } 698 break; 699 700 default: 701 if (!ndo->ndo_vflag) 702 ND_PRINT((ndo, " unknown")); 703 else 704 ND_PRINT((ndo, "\n\tUnknown message type %d", type)); 705 } 706 i += len + 2; 707 } 708 return; 709 710 trunc: 711 ND_PRINT((ndo, " %s", tstr)); 712 return; 713 714 invalid: 715 ND_PRINT((ndo, "%s", istr)); 716 return; 717 } 718
