1/* 2 * Copyright (c) 2007-2011 Gr��goire 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 44static const char tstr[] = "[|babel]"; 45 46static void babel_print_v2(netdissect_options *, const u_char *cp, u_int length); 47 48void 49babel_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 */ 104static const struct tok diversity_str[] = { 105 { 0, "reserved" }, 106 { 255, "all" }, 107 { 0, NULL } 108}; 109 110static const char * 111format_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 120static const unsigned char v4prefix[16] = 121 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 }; 122 123static const char * 124format_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 135static const char * 136format_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 144static const char * 145format_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 155static const char * 156format_interval_update(const uint16_t i) 157{ 158 return i == 0xFFFF ? "infinity" : format_interval(i); 159} 160 161static const char * 162format_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. */ 171static int 172network_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 236static int 237network_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 */ 268static void 269subtlvs_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 340static void 341babel_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 if (4U + bodylen > length) 356 goto invalid; 357 358 /* Process the TLVs in the body */ 359 i = 0; 360 while(i < bodylen) { 361 const u_char *message; 362 u_int type, len; 363 364 message = cp + 4 + i; 365 366 ND_TCHECK2(*message, 1); 367 if((type = message[0]) == MESSAGE_PAD1) { 368 ND_PRINT((ndo, ndo->ndo_vflag ? "\n\tPad 1" : " pad1")); 369 i += 1; 370 continue; 371 } 372 373 ND_TCHECK2(*message, 2); 374 ICHECK(i, 2); 375 len = message[1]; 376 377 ND_TCHECK2(*message, 2 + len); 378 ICHECK(i, 2 + len); 379 380 switch(type) { 381 case MESSAGE_PADN: { 382 if (!ndo->ndo_vflag) 383 ND_PRINT((ndo, " padN")); 384 else 385 ND_PRINT((ndo, "\n\tPad %d", len + 2)); 386 } 387 break; 388 389 case MESSAGE_ACK_REQ: { 390 u_short nonce, interval; 391 if (!ndo->ndo_vflag) 392 ND_PRINT((ndo, " ack-req")); 393 else { 394 ND_PRINT((ndo, "\n\tAcknowledgment Request ")); 395 if(len < 6) goto invalid; 396 nonce = EXTRACT_16BITS(message + 4); 397 interval = EXTRACT_16BITS(message + 6); 398 ND_PRINT((ndo, "%04x %s", nonce, format_interval(interval))); 399 } 400 } 401 break; 402 403 case MESSAGE_ACK: { 404 u_short nonce; 405 if (!ndo->ndo_vflag) 406 ND_PRINT((ndo, " ack")); 407 else { 408 ND_PRINT((ndo, "\n\tAcknowledgment ")); 409 if(len < 2) goto invalid; 410 nonce = EXTRACT_16BITS(message + 2); 411 ND_PRINT((ndo, "%04x", nonce)); 412 } 413 } 414 break; 415 416 case MESSAGE_HELLO: { 417 u_short seqno, interval; 418 if (!ndo->ndo_vflag) 419 ND_PRINT((ndo, " hello")); 420 else { 421 ND_PRINT((ndo, "\n\tHello ")); 422 if(len < 6) goto invalid; 423 seqno = EXTRACT_16BITS(message + 4); 424 interval = EXTRACT_16BITS(message + 6); 425 ND_PRINT((ndo, "seqno %u interval %s", seqno, format_interval(interval))); 426 /* Extra data. */ 427 if(len > 6) 428 subtlvs_print(ndo, message + 8, message + 2 + len, type); 429 } 430 } 431 break; 432 433 case MESSAGE_IHU: { 434 unsigned short txcost, interval; 435 if (!ndo->ndo_vflag) 436 ND_PRINT((ndo, " ihu")); 437 else { 438 u_char address[16]; 439 int rc; 440 ND_PRINT((ndo, "\n\tIHU ")); 441 if(len < 6) goto invalid; 442 txcost = EXTRACT_16BITS(message + 4); 443 interval = EXTRACT_16BITS(message + 6); 444 rc = network_address(message[2], message + 8, len - 6, address); 445 if(rc < 0) { ND_PRINT((ndo, "%s", tstr)); break; } 446 ND_PRINT((ndo, "%s txcost %u interval %s", 447 format_address(ndo, address), txcost, format_interval(interval))); 448 /* Extra data. */ 449 if((u_int)rc < len - 6) 450 subtlvs_print(ndo, message + 8 + rc, message + 2 + len, 451 type); 452 } 453 } 454 break; 455 456 case MESSAGE_ROUTER_ID: { 457 if (!ndo->ndo_vflag) 458 ND_PRINT((ndo, " router-id")); 459 else { 460 ND_PRINT((ndo, "\n\tRouter Id")); 461 if(len < 10) goto invalid; 462 ND_PRINT((ndo, " %s", format_id(message + 4))); 463 } 464 } 465 break; 466 467 case MESSAGE_NH: { 468 if (!ndo->ndo_vflag) 469 ND_PRINT((ndo, " nh")); 470 else { 471 int rc; 472 u_char nh[16]; 473 ND_PRINT((ndo, "\n\tNext Hop")); 474 if(len < 2) goto invalid; 475 rc = network_address(message[2], message + 4, len - 2, nh); 476 if(rc < 0) goto invalid; 477 ND_PRINT((ndo, " %s", format_address(ndo, nh))); 478 } 479 } 480 break; 481 482 case MESSAGE_UPDATE: { 483 if (!ndo->ndo_vflag) { 484 ND_PRINT((ndo, " update")); 485 if(len < 10) 486 ND_PRINT((ndo, "/truncated")); 487 else 488 ND_PRINT((ndo, "%s%s%s", 489 (message[3] & 0x80) ? "/prefix": "", 490 (message[3] & 0x40) ? "/id" : "", 491 (message[3] & 0x3f) ? "/unknown" : "")); 492 } else { 493 u_short interval, seqno, metric; 494 u_char plen; 495 int rc; 496 u_char prefix[16]; 497 ND_PRINT((ndo, "\n\tUpdate")); 498 if(len < 10) goto invalid; 499 plen = message[4] + (message[2] == 1 ? 96 : 0); 500 rc = network_prefix(message[2], message[4], message[5], 501 message + 12, 502 message[2] == 1 ? v4_prefix : v6_prefix, 503 len - 10, prefix); 504 if(rc < 0) goto invalid; 505 interval = EXTRACT_16BITS(message + 6); 506 seqno = EXTRACT_16BITS(message + 8); 507 metric = EXTRACT_16BITS(message + 10); 508 ND_PRINT((ndo, "%s%s%s %s metric %u seqno %u interval %s", 509 (message[3] & 0x80) ? "/prefix": "", 510 (message[3] & 0x40) ? "/id" : "", 511 (message[3] & 0x3f) ? "/unknown" : "", 512 format_prefix(ndo, prefix, plen), 513 metric, seqno, format_interval_update(interval))); 514 if(message[3] & 0x80) { 515 if(message[2] == 1) 516 memcpy(v4_prefix, prefix, 16); 517 else 518 memcpy(v6_prefix, prefix, 16); 519 } 520 /* extra data? */ 521 if((u_int)rc < len - 10) 522 subtlvs_print(ndo, message + 12 + rc, message + 2 + len, type); 523 } 524 } 525 break; 526 527 case MESSAGE_REQUEST: { 528 if (!ndo->ndo_vflag) 529 ND_PRINT((ndo, " request")); 530 else { 531 int rc; 532 u_char prefix[16], plen; 533 ND_PRINT((ndo, "\n\tRequest ")); 534 if(len < 2) goto invalid; 535 plen = message[3] + (message[2] == 1 ? 96 : 0); 536 rc = network_prefix(message[2], message[3], 0, 537 message + 4, NULL, len - 2, prefix); 538 if(rc < 0) goto invalid; 539 ND_PRINT((ndo, "for %s", 540 message[2] == 0 ? "any" : format_prefix(ndo, prefix, plen))); 541 } 542 } 543 break; 544 545 case MESSAGE_MH_REQUEST : { 546 if (!ndo->ndo_vflag) 547 ND_PRINT((ndo, " mh-request")); 548 else { 549 int rc; 550 u_short seqno; 551 u_char prefix[16], plen; 552 ND_PRINT((ndo, "\n\tMH-Request ")); 553 if(len < 14) goto invalid; 554 seqno = EXTRACT_16BITS(message + 4); 555 rc = network_prefix(message[2], message[3], 0, 556 message + 16, NULL, len - 14, prefix); 557 if(rc < 0) goto invalid; 558 plen = message[3] + (message[2] == 1 ? 96 : 0); 559 ND_PRINT((ndo, "(%u hops) for %s seqno %u id %s", 560 message[6], format_prefix(ndo, prefix, plen), 561 seqno, format_id(message + 8))); 562 } 563 } 564 break; 565 case MESSAGE_TSPC : 566 if (!ndo->ndo_vflag) 567 ND_PRINT((ndo, " tspc")); 568 else { 569 ND_PRINT((ndo, "\n\tTS/PC ")); 570 if(len < 6) goto invalid; 571 ND_PRINT((ndo, "timestamp %u packetcounter %u", EXTRACT_32BITS (message + 4), 572 EXTRACT_16BITS(message + 2))); 573 } 574 break; 575 case MESSAGE_HMAC : { 576 if (!ndo->ndo_vflag) 577 ND_PRINT((ndo, " hmac")); 578 else { 579 unsigned j; 580 ND_PRINT((ndo, "\n\tHMAC ")); 581 if(len < 18) goto invalid; 582 ND_PRINT((ndo, "key-id %u digest-%u ", EXTRACT_16BITS(message + 2), len - 2)); 583 for (j = 0; j < len - 2; j++) 584 ND_PRINT((ndo, "%02X", message[4 + j])); 585 } 586 } 587 break; 588 589 case MESSAGE_UPDATE_SRC_SPECIFIC : { 590 if(!ndo->ndo_vflag) { 591 ND_PRINT((ndo, " ss-update")); 592 } else { 593 u_char prefix[16], src_prefix[16]; 594 u_short interval, seqno, metric; 595 u_char ae, plen, src_plen, omitted; 596 int rc; 597 int parsed_len = 10; 598 ND_PRINT((ndo, "\n\tSS-Update")); 599 if(len < 10) goto invalid; 600 ae = message[2]; 601 src_plen = message[3]; 602 plen = message[4]; 603 omitted = message[5]; 604 interval = EXTRACT_16BITS(message + 6); 605 seqno = EXTRACT_16BITS(message + 8); 606 metric = EXTRACT_16BITS(message + 10); 607 rc = network_prefix(ae, plen, omitted, message + 2 + parsed_len, 608 ae == 1 ? v4_prefix : v6_prefix, 609 len - parsed_len, prefix); 610 if(rc < 0) goto invalid; 611 if(ae == 1) 612 plen += 96; 613 parsed_len += rc; 614 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 615 NULL, len - parsed_len, src_prefix); 616 if(rc < 0) goto invalid; 617 if(ae == 1) 618 src_plen += 96; 619 parsed_len += rc; 620 621 ND_PRINT((ndo, " %s from", format_prefix(ndo, prefix, plen))); 622 ND_PRINT((ndo, " %s metric %u seqno %u interval %s", 623 format_prefix(ndo, src_prefix, src_plen), 624 metric, seqno, format_interval_update(interval))); 625 /* extra data? */ 626 if((u_int)parsed_len < len) 627 subtlvs_print(ndo, message + 2 + parsed_len, 628 message + 2 + len, type); 629 } 630 } 631 break; 632 633 case MESSAGE_REQUEST_SRC_SPECIFIC : { 634 if(!ndo->ndo_vflag) 635 ND_PRINT((ndo, " ss-request")); 636 else { 637 int rc, parsed_len = 3; 638 u_char ae, plen, src_plen, prefix[16], src_prefix[16]; 639 ND_PRINT((ndo, "\n\tSS-Request ")); 640 if(len < 3) goto invalid; 641 ae = message[2]; 642 plen = message[3]; 643 src_plen = message[4]; 644 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 645 NULL, len - parsed_len, prefix); 646 if(rc < 0) goto invalid; 647 if(ae == 1) 648 plen += 96; 649 parsed_len += rc; 650 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 651 NULL, len - parsed_len, src_prefix); 652 if(rc < 0) goto invalid; 653 if(ae == 1) 654 src_plen += 96; 655 parsed_len += rc; 656 if(ae == 0) { 657 ND_PRINT((ndo, "for any")); 658 } else { 659 ND_PRINT((ndo, "for (%s, ", format_prefix(ndo, prefix, plen))); 660 ND_PRINT((ndo, "%s)", format_prefix(ndo, src_prefix, src_plen))); 661 } 662 } 663 } 664 break; 665 666 case MESSAGE_MH_REQUEST_SRC_SPECIFIC : { 667 if(!ndo->ndo_vflag) 668 ND_PRINT((ndo, " ss-mh-request")); 669 else { 670 int rc, parsed_len = 14; 671 u_short seqno; 672 u_char ae, plen, src_plen, prefix[16], src_prefix[16], hopc; 673 const u_char *router_id = NULL; 674 ND_PRINT((ndo, "\n\tSS-MH-Request ")); 675 if(len < 14) goto invalid; 676 ae = message[2]; 677 plen = message[3]; 678 seqno = EXTRACT_16BITS(message + 4); 679 hopc = message[6]; 680 src_plen = message[7]; 681 router_id = message + 8; 682 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 683 NULL, len - parsed_len, prefix); 684 if(rc < 0) goto invalid; 685 if(ae == 1) 686 plen += 96; 687 parsed_len += rc; 688 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 689 NULL, len - parsed_len, src_prefix); 690 if(rc < 0) goto invalid; 691 if(ae == 1) 692 src_plen += 96; 693 ND_PRINT((ndo, "(%u hops) for (%s, ", 694 hopc, format_prefix(ndo, prefix, plen))); 695 ND_PRINT((ndo, "%s) seqno %u id %s", 696 format_prefix(ndo, src_prefix, src_plen), 697 seqno, format_id(router_id))); 698 } 699 } 700 break; 701 702 default: 703 if (!ndo->ndo_vflag) 704 ND_PRINT((ndo, " unknown")); 705 else 706 ND_PRINT((ndo, "\n\tUnknown message type %d", type)); 707 } 708 i += len + 2; 709 } 710 return; 711 712 trunc: 713 ND_PRINT((ndo, " %s", tstr)); 714 return; 715 716 invalid: 717 ND_PRINT((ndo, "%s", istr)); 718 return; 719} 720