1 /* 2 * Copyright (c) 2007-2011 Grégoire 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 #include <sys/cdefs.h> 30 #ifndef lint 31 __RCSID("$NetBSD: print-babel.c,v 1.4 2019/10/01 16:06:16 christos Exp $"); 32 #endif 33 34 /* \summary: Babel Routing Protocol printer */ 35 36 #ifdef HAVE_CONFIG_H 37 #include "config.h" 38 #endif 39 40 #include <netdissect-stdinc.h> 41 42 #include <stdio.h> 43 #include <string.h> 44 45 #include "netdissect.h" 46 #include "addrtoname.h" 47 #include "extract.h" 48 49 static const char tstr[] = "[|babel]"; 50 51 static void babel_print_v2(netdissect_options *, const u_char *cp, u_int length); 52 53 void 54 babel_print(netdissect_options *ndo, 55 const u_char *cp, u_int length) 56 { 57 ND_PRINT((ndo, "babel")); 58 59 ND_TCHECK2(*cp, 4); 60 61 if(cp[0] != 42) { 62 ND_PRINT((ndo, " invalid header")); 63 return; 64 } else { 65 ND_PRINT((ndo, " %d", cp[1])); 66 } 67 68 switch(cp[1]) { 69 case 2: 70 babel_print_v2(ndo, cp, length); 71 break; 72 default: 73 ND_PRINT((ndo, " unknown version")); 74 break; 75 } 76 77 return; 78 79 trunc: 80 ND_PRINT((ndo, " %s", tstr)); 81 return; 82 } 83 84 /* TLVs */ 85 #define MESSAGE_PAD1 0 86 #define MESSAGE_PADN 1 87 #define MESSAGE_ACK_REQ 2 88 #define MESSAGE_ACK 3 89 #define MESSAGE_HELLO 4 90 #define MESSAGE_IHU 5 91 #define MESSAGE_ROUTER_ID 6 92 #define MESSAGE_NH 7 93 #define MESSAGE_UPDATE 8 94 #define MESSAGE_REQUEST 9 95 #define MESSAGE_MH_REQUEST 10 96 #define MESSAGE_TSPC 11 97 #define MESSAGE_HMAC 12 98 #define MESSAGE_UPDATE_SRC_SPECIFIC 13 99 #define MESSAGE_REQUEST_SRC_SPECIFIC 14 100 #define MESSAGE_MH_REQUEST_SRC_SPECIFIC 15 101 102 /* sub-TLVs */ 103 #define MESSAGE_SUB_PAD1 0 104 #define MESSAGE_SUB_PADN 1 105 #define MESSAGE_SUB_DIVERSITY 2 106 #define MESSAGE_SUB_TIMESTAMP 3 107 108 /* Diversity sub-TLV channel codes */ 109 static const struct tok diversity_str[] = { 110 { 0, "reserved" }, 111 { 255, "all" }, 112 { 0, NULL } 113 }; 114 115 static const char * 116 format_id(const u_char *id) 117 { 118 static char buf[25]; 119 snprintf(buf, 25, "%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x", 120 id[0], id[1], id[2], id[3], id[4], id[5], id[6], id[7]); 121 buf[24] = '\0'; 122 return buf; 123 } 124 125 static const unsigned char v4prefix[16] = 126 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 }; 127 128 static const char * 129 format_prefix(netdissect_options *ndo, const u_char *prefix, unsigned char plen) 130 { 131 static char buf[50]; 132 if(plen >= 96 && memcmp(prefix, v4prefix, 12) == 0) 133 snprintf(buf, 50, "%s/%u", ipaddr_string(ndo, prefix + 12), plen - 96); 134 else 135 snprintf(buf, 50, "%s/%u", ip6addr_string(ndo, prefix), plen); 136 buf[49] = '\0'; 137 return buf; 138 } 139 140 static const char * 141 format_address(netdissect_options *ndo, const u_char *prefix) 142 { 143 if(memcmp(prefix, v4prefix, 12) == 0) 144 return ipaddr_string(ndo, prefix + 12); 145 else 146 return ip6addr_string(ndo, prefix); 147 } 148 149 static const char * 150 format_interval(const uint16_t i) 151 { 152 static char buf[sizeof("000.00s")]; 153 154 if (i == 0) 155 return "0.0s (bogus)"; 156 snprintf(buf, sizeof(buf), "%u.%02us", i / 100, i % 100); 157 return buf; 158 } 159 160 static const char * 161 format_interval_update(const uint16_t i) 162 { 163 return i == 0xFFFF ? "infinity" : format_interval(i); 164 } 165 166 static const char * 167 format_timestamp(const uint32_t i) 168 { 169 static char buf[sizeof("0000.000000s")]; 170 snprintf(buf, sizeof(buf), "%u.%06us", i / 1000000, i % 1000000); 171 return buf; 172 } 173 174 /* Return number of octets consumed from the input buffer (not the prefix length 175 * in bytes), or -1 for encoding error. */ 176 static int 177 network_prefix(int ae, int plen, unsigned int omitted, 178 const unsigned char *p, const unsigned char *dp, 179 unsigned int len, unsigned char *p_r) 180 { 181 unsigned pb; 182 unsigned char prefix[16]; 183 int consumed = 0; 184 185 if(plen >= 0) 186 pb = (plen + 7) / 8; 187 else if(ae == 1) 188 pb = 4; 189 else 190 pb = 16; 191 192 if(pb > 16) 193 return -1; 194 195 memset(prefix, 0, 16); 196 197 switch(ae) { 198 case 0: break; 199 case 1: 200 if(omitted > 4 || pb > 4 || (pb > omitted && len < pb - omitted)) 201 return -1; 202 memcpy(prefix, v4prefix, 12); 203 if(omitted) { 204 if (dp == NULL) return -1; 205 memcpy(prefix, dp, 12 + omitted); 206 } 207 if(pb > omitted) { 208 memcpy(prefix + 12 + omitted, p, pb - omitted); 209 consumed = pb - omitted; 210 } 211 break; 212 case 2: 213 if(omitted > 16 || (pb > omitted && len < pb - omitted)) 214 return -1; 215 if(omitted) { 216 if (dp == NULL) return -1; 217 memcpy(prefix, dp, omitted); 218 } 219 if(pb > omitted) { 220 memcpy(prefix + omitted, p, pb - omitted); 221 consumed = pb - omitted; 222 } 223 break; 224 case 3: 225 if(pb > 8 && len < pb - 8) return -1; 226 prefix[0] = 0xfe; 227 prefix[1] = 0x80; 228 if(pb > 8) { 229 memcpy(prefix + 8, p, pb - 8); 230 consumed = pb - 8; 231 } 232 break; 233 default: 234 return -1; 235 } 236 237 memcpy(p_r, prefix, 16); 238 return consumed; 239 } 240 241 static int 242 network_address(int ae, const unsigned char *a, unsigned int len, 243 unsigned char *a_r) 244 { 245 return network_prefix(ae, -1, 0, a, NULL, len, a_r); 246 } 247 248 /* 249 * Sub-TLVs consume the "extra data" of Babel TLVs (see Section 4.3 of RFC6126), 250 * their encoding is similar to the encoding of TLVs, but the type namespace is 251 * different: 252 * 253 * o Type 0 stands for Pad1 sub-TLV with the same encoding as the Pad1 TLV. 254 * o Type 1 stands for PadN sub-TLV with the same encoding as the PadN TLV. 255 * o Type 2 stands for Diversity sub-TLV, which propagates diversity routing 256 * data. Its body is a variable-length sequence of 8-bit unsigned integers, 257 * each representing per-hop number of interferring radio channel for the 258 * prefix. Channel 0 is invalid and must not be used in the sub-TLV, channel 259 * 255 interferes with any other channel. 260 * o Type 3 stands for Timestamp sub-TLV, used to compute RTT between 261 * neighbours. In the case of a Hello TLV, the body stores a 32-bits 262 * timestamp, while in the case of a IHU TLV, two 32-bits timestamps are 263 * stored. 264 * 265 * Sub-TLV types 0 and 1 are valid for any TLV type, whether sub-TLV type 2 is 266 * only valid for TLV type 8 (Update). Note that within an Update TLV a missing 267 * Diversity sub-TLV is not the same as a Diversity sub-TLV with an empty body. 268 * The former would mean a lack of any claims about the interference, and the 269 * latter would state that interference is definitely absent. 270 * A type 3 sub-TLV is valid both for Hello and IHU TLVs, though the exact 271 * semantic of the sub-TLV is different in each case. 272 */ 273 static void 274 subtlvs_print(netdissect_options *ndo, 275 const u_char *cp, const u_char *ep, const uint8_t tlv_type) 276 { 277 uint8_t subtype, sublen; 278 const char *sep; 279 uint32_t t1, t2; 280 281 while (cp < ep) { 282 subtype = *cp++; 283 if(subtype == MESSAGE_SUB_PAD1) { 284 ND_PRINT((ndo, " sub-pad1")); 285 continue; 286 } 287 if(cp == ep) 288 goto invalid; 289 sublen = *cp++; 290 if(cp + sublen > ep) 291 goto invalid; 292 293 switch(subtype) { 294 case MESSAGE_SUB_PADN: 295 ND_PRINT((ndo, " sub-padn")); 296 cp += sublen; 297 break; 298 case MESSAGE_SUB_DIVERSITY: 299 ND_PRINT((ndo, " sub-diversity")); 300 if (sublen == 0) { 301 ND_PRINT((ndo, " empty")); 302 break; 303 } 304 sep = " "; 305 while(sublen--) { 306 ND_PRINT((ndo, "%s%s", sep, tok2str(diversity_str, "%u", *cp++))); 307 sep = "-"; 308 } 309 if(tlv_type != MESSAGE_UPDATE && 310 tlv_type != MESSAGE_UPDATE_SRC_SPECIFIC) 311 ND_PRINT((ndo, " (bogus)")); 312 break; 313 case MESSAGE_SUB_TIMESTAMP: 314 ND_PRINT((ndo, " sub-timestamp")); 315 if(tlv_type == MESSAGE_HELLO) { 316 if(sublen < 4) 317 goto invalid; 318 t1 = EXTRACT_32BITS(cp); 319 ND_PRINT((ndo, " %s", format_timestamp(t1))); 320 } else if(tlv_type == MESSAGE_IHU) { 321 if(sublen < 8) 322 goto invalid; 323 t1 = EXTRACT_32BITS(cp); 324 ND_PRINT((ndo, " %s", format_timestamp(t1))); 325 t2 = EXTRACT_32BITS(cp + 4); 326 ND_PRINT((ndo, "|%s", format_timestamp(t2))); 327 } else 328 ND_PRINT((ndo, " (bogus)")); 329 cp += sublen; 330 break; 331 default: 332 ND_PRINT((ndo, " sub-unknown-0x%02x", subtype)); 333 cp += sublen; 334 } /* switch */ 335 } /* while */ 336 return; 337 338 invalid: 339 ND_PRINT((ndo, "%s", istr)); 340 } 341 342 #define ICHECK(i, l) \ 343 if ((i) + (l) > bodylen || (i) + (l) > length) goto invalid; 344 345 static void 346 babel_print_v2(netdissect_options *ndo, 347 const u_char *cp, u_int length) 348 { 349 u_int i; 350 u_short bodylen; 351 u_char v4_prefix[16] = 352 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF, 0, 0, 0, 0 }; 353 u_char v6_prefix[16] = {0}; 354 355 ND_TCHECK2(*cp, 4); 356 if (length < 4) 357 goto invalid; 358 bodylen = EXTRACT_16BITS(cp + 2); 359 ND_PRINT((ndo, " (%u)", bodylen)); 360 if (4U + bodylen > length) 361 goto invalid; 362 363 /* Process the TLVs in the body */ 364 i = 0; 365 while(i < bodylen) { 366 const u_char *message; 367 u_int type, len; 368 369 message = cp + 4 + i; 370 371 ND_TCHECK2(*message, 1); 372 if((type = message[0]) == MESSAGE_PAD1) { 373 ND_PRINT((ndo, ndo->ndo_vflag ? "\n\tPad 1" : " pad1")); 374 i += 1; 375 continue; 376 } 377 378 ND_TCHECK2(*message, 2); 379 ICHECK(i, 2); 380 len = message[1]; 381 382 ND_TCHECK2(*message, 2 + len); 383 ICHECK(i, 2 + len); 384 385 switch(type) { 386 case MESSAGE_PADN: { 387 if (!ndo->ndo_vflag) 388 ND_PRINT((ndo, " padN")); 389 else 390 ND_PRINT((ndo, "\n\tPad %d", len + 2)); 391 } 392 break; 393 394 case MESSAGE_ACK_REQ: { 395 u_short nonce, interval; 396 if (!ndo->ndo_vflag) 397 ND_PRINT((ndo, " ack-req")); 398 else { 399 ND_PRINT((ndo, "\n\tAcknowledgment Request ")); 400 if(len < 6) goto invalid; 401 nonce = EXTRACT_16BITS(message + 4); 402 interval = EXTRACT_16BITS(message + 6); 403 ND_PRINT((ndo, "%04x %s", nonce, format_interval(interval))); 404 } 405 } 406 break; 407 408 case MESSAGE_ACK: { 409 u_short nonce; 410 if (!ndo->ndo_vflag) 411 ND_PRINT((ndo, " ack")); 412 else { 413 ND_PRINT((ndo, "\n\tAcknowledgment ")); 414 if(len < 2) goto invalid; 415 nonce = EXTRACT_16BITS(message + 2); 416 ND_PRINT((ndo, "%04x", nonce)); 417 } 418 } 419 break; 420 421 case MESSAGE_HELLO: { 422 u_short seqno, interval; 423 if (!ndo->ndo_vflag) 424 ND_PRINT((ndo, " hello")); 425 else { 426 ND_PRINT((ndo, "\n\tHello ")); 427 if(len < 6) goto invalid; 428 seqno = EXTRACT_16BITS(message + 4); 429 interval = EXTRACT_16BITS(message + 6); 430 ND_PRINT((ndo, "seqno %u interval %s", seqno, format_interval(interval))); 431 /* Extra data. */ 432 if(len > 6) 433 subtlvs_print(ndo, message + 8, message + 2 + len, type); 434 } 435 } 436 break; 437 438 case MESSAGE_IHU: { 439 unsigned short txcost, interval; 440 if (!ndo->ndo_vflag) 441 ND_PRINT((ndo, " ihu")); 442 else { 443 u_char address[16]; 444 int rc; 445 ND_PRINT((ndo, "\n\tIHU ")); 446 if(len < 6) goto invalid; 447 txcost = EXTRACT_16BITS(message + 4); 448 interval = EXTRACT_16BITS(message + 6); 449 rc = network_address(message[2], message + 8, len - 6, address); 450 if(rc < 0) { ND_PRINT((ndo, "%s", tstr)); break; } 451 ND_PRINT((ndo, "%s txcost %u interval %s", 452 format_address(ndo, address), txcost, format_interval(interval))); 453 /* Extra data. */ 454 if((u_int)rc < len - 6) 455 subtlvs_print(ndo, message + 8 + rc, message + 2 + len, 456 type); 457 } 458 } 459 break; 460 461 case MESSAGE_ROUTER_ID: { 462 if (!ndo->ndo_vflag) 463 ND_PRINT((ndo, " router-id")); 464 else { 465 ND_PRINT((ndo, "\n\tRouter Id")); 466 if(len < 10) goto invalid; 467 ND_PRINT((ndo, " %s", format_id(message + 4))); 468 } 469 } 470 break; 471 472 case MESSAGE_NH: { 473 if (!ndo->ndo_vflag) 474 ND_PRINT((ndo, " nh")); 475 else { 476 int rc; 477 u_char nh[16]; 478 ND_PRINT((ndo, "\n\tNext Hop")); 479 if(len < 2) goto invalid; 480 rc = network_address(message[2], message + 4, len - 2, nh); 481 if(rc < 0) goto invalid; 482 ND_PRINT((ndo, " %s", format_address(ndo, nh))); 483 } 484 } 485 break; 486 487 case MESSAGE_UPDATE: { 488 if (!ndo->ndo_vflag) { 489 ND_PRINT((ndo, " update")); 490 if(len < 10) 491 ND_PRINT((ndo, "/truncated")); 492 else 493 ND_PRINT((ndo, "%s%s%s", 494 (message[3] & 0x80) ? "/prefix": "", 495 (message[3] & 0x40) ? "/id" : "", 496 (message[3] & 0x3f) ? "/unknown" : "")); 497 } else { 498 u_short interval, seqno, metric; 499 u_char plen; 500 int rc; 501 u_char prefix[16]; 502 ND_PRINT((ndo, "\n\tUpdate")); 503 if(len < 10) goto invalid; 504 plen = message[4] + (message[2] == 1 ? 96 : 0); 505 rc = network_prefix(message[2], message[4], message[5], 506 message + 12, 507 message[2] == 1 ? v4_prefix : v6_prefix, 508 len - 10, prefix); 509 if(rc < 0) goto invalid; 510 interval = EXTRACT_16BITS(message + 6); 511 seqno = EXTRACT_16BITS(message + 8); 512 metric = EXTRACT_16BITS(message + 10); 513 ND_PRINT((ndo, "%s%s%s %s metric %u seqno %u interval %s", 514 (message[3] & 0x80) ? "/prefix": "", 515 (message[3] & 0x40) ? "/id" : "", 516 (message[3] & 0x3f) ? "/unknown" : "", 517 format_prefix(ndo, prefix, plen), 518 metric, seqno, format_interval_update(interval))); 519 if(message[3] & 0x80) { 520 if(message[2] == 1) 521 memcpy(v4_prefix, prefix, 16); 522 else 523 memcpy(v6_prefix, prefix, 16); 524 } 525 /* extra data? */ 526 if((u_int)rc < len - 10) 527 subtlvs_print(ndo, message + 12 + rc, message + 2 + len, type); 528 } 529 } 530 break; 531 532 case MESSAGE_REQUEST: { 533 if (!ndo->ndo_vflag) 534 ND_PRINT((ndo, " request")); 535 else { 536 int rc; 537 u_char prefix[16], plen; 538 ND_PRINT((ndo, "\n\tRequest ")); 539 if(len < 2) goto invalid; 540 plen = message[3] + (message[2] == 1 ? 96 : 0); 541 rc = network_prefix(message[2], message[3], 0, 542 message + 4, NULL, len - 2, prefix); 543 if(rc < 0) goto invalid; 544 ND_PRINT((ndo, "for %s", 545 message[2] == 0 ? "any" : format_prefix(ndo, prefix, plen))); 546 } 547 } 548 break; 549 550 case MESSAGE_MH_REQUEST : { 551 if (!ndo->ndo_vflag) 552 ND_PRINT((ndo, " mh-request")); 553 else { 554 int rc; 555 u_short seqno; 556 u_char prefix[16], plen; 557 ND_PRINT((ndo, "\n\tMH-Request ")); 558 if(len < 14) goto invalid; 559 seqno = EXTRACT_16BITS(message + 4); 560 rc = network_prefix(message[2], message[3], 0, 561 message + 16, NULL, len - 14, prefix); 562 if(rc < 0) goto invalid; 563 plen = message[3] + (message[2] == 1 ? 96 : 0); 564 ND_PRINT((ndo, "(%u hops) for %s seqno %u id %s", 565 message[6], format_prefix(ndo, prefix, plen), 566 seqno, format_id(message + 8))); 567 } 568 } 569 break; 570 case MESSAGE_TSPC : 571 if (!ndo->ndo_vflag) 572 ND_PRINT((ndo, " tspc")); 573 else { 574 ND_PRINT((ndo, "\n\tTS/PC ")); 575 if(len < 6) goto invalid; 576 ND_PRINT((ndo, "timestamp %u packetcounter %u", EXTRACT_32BITS (message + 4), 577 EXTRACT_16BITS(message + 2))); 578 } 579 break; 580 case MESSAGE_HMAC : { 581 if (!ndo->ndo_vflag) 582 ND_PRINT((ndo, " hmac")); 583 else { 584 unsigned j; 585 ND_PRINT((ndo, "\n\tHMAC ")); 586 if(len < 18) goto invalid; 587 ND_PRINT((ndo, "key-id %u digest-%u ", EXTRACT_16BITS(message + 2), len - 2)); 588 for (j = 0; j < len - 2; j++) 589 ND_PRINT((ndo, "%02X", message[4 + j])); 590 } 591 } 592 break; 593 594 case MESSAGE_UPDATE_SRC_SPECIFIC : { 595 if(!ndo->ndo_vflag) { 596 ND_PRINT((ndo, " ss-update")); 597 } else { 598 u_char prefix[16], src_prefix[16]; 599 u_short interval, seqno, metric; 600 u_char ae, plen, src_plen, omitted; 601 int rc; 602 int parsed_len = 10; 603 ND_PRINT((ndo, "\n\tSS-Update")); 604 if(len < 10) goto invalid; 605 ae = message[2]; 606 src_plen = message[3]; 607 plen = message[4]; 608 omitted = message[5]; 609 interval = EXTRACT_16BITS(message + 6); 610 seqno = EXTRACT_16BITS(message + 8); 611 metric = EXTRACT_16BITS(message + 10); 612 rc = network_prefix(ae, plen, omitted, message + 2 + parsed_len, 613 ae == 1 ? v4_prefix : v6_prefix, 614 len - parsed_len, prefix); 615 if(rc < 0) goto invalid; 616 if(ae == 1) 617 plen += 96; 618 parsed_len += rc; 619 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 620 NULL, len - parsed_len, src_prefix); 621 if(rc < 0) goto invalid; 622 if(ae == 1) 623 src_plen += 96; 624 parsed_len += rc; 625 626 ND_PRINT((ndo, " %s from", format_prefix(ndo, prefix, plen))); 627 ND_PRINT((ndo, " %s metric %u seqno %u interval %s", 628 format_prefix(ndo, src_prefix, src_plen), 629 metric, seqno, format_interval_update(interval))); 630 /* extra data? */ 631 if((u_int)parsed_len < len) 632 subtlvs_print(ndo, message + 2 + parsed_len, 633 message + 2 + len, type); 634 } 635 } 636 break; 637 638 case MESSAGE_REQUEST_SRC_SPECIFIC : { 639 if(!ndo->ndo_vflag) 640 ND_PRINT((ndo, " ss-request")); 641 else { 642 int rc, parsed_len = 3; 643 u_char ae, plen, src_plen, prefix[16], src_prefix[16]; 644 ND_PRINT((ndo, "\n\tSS-Request ")); 645 if(len < 3) goto invalid; 646 ae = message[2]; 647 plen = message[3]; 648 src_plen = message[4]; 649 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 650 NULL, len - parsed_len, prefix); 651 if(rc < 0) goto invalid; 652 if(ae == 1) 653 plen += 96; 654 parsed_len += rc; 655 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 656 NULL, len - parsed_len, src_prefix); 657 if(rc < 0) goto invalid; 658 if(ae == 1) 659 src_plen += 96; 660 parsed_len += rc; 661 if(ae == 0) { 662 ND_PRINT((ndo, "for any")); 663 } else { 664 ND_PRINT((ndo, "for (%s, ", format_prefix(ndo, prefix, plen))); 665 ND_PRINT((ndo, "%s)", format_prefix(ndo, src_prefix, src_plen))); 666 } 667 } 668 } 669 break; 670 671 case MESSAGE_MH_REQUEST_SRC_SPECIFIC : { 672 if(!ndo->ndo_vflag) 673 ND_PRINT((ndo, " ss-mh-request")); 674 else { 675 int rc, parsed_len = 14; 676 u_short seqno; 677 u_char ae, plen, src_plen, prefix[16], src_prefix[16], hopc; 678 const u_char *router_id = NULL; 679 ND_PRINT((ndo, "\n\tSS-MH-Request ")); 680 if(len < 14) goto invalid; 681 ae = message[2]; 682 plen = message[3]; 683 seqno = EXTRACT_16BITS(message + 4); 684 hopc = message[6]; 685 src_plen = message[7]; 686 router_id = message + 8; 687 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 688 NULL, len - parsed_len, prefix); 689 if(rc < 0) goto invalid; 690 if(ae == 1) 691 plen += 96; 692 parsed_len += rc; 693 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 694 NULL, len - parsed_len, src_prefix); 695 if(rc < 0) goto invalid; 696 if(ae == 1) 697 src_plen += 96; 698 ND_PRINT((ndo, "(%u hops) for (%s, ", 699 hopc, format_prefix(ndo, prefix, plen))); 700 ND_PRINT((ndo, "%s) seqno %u id %s", 701 format_prefix(ndo, src_prefix, src_plen), 702 seqno, format_id(router_id))); 703 } 704 } 705 break; 706 707 default: 708 if (!ndo->ndo_vflag) 709 ND_PRINT((ndo, " unknown")); 710 else 711 ND_PRINT((ndo, "\n\tUnknown message type %d", type)); 712 } 713 i += len + 2; 714 } 715 return; 716 717 trunc: 718 ND_PRINT((ndo, " %s", tstr)); 719 return; 720 721 invalid: 722 ND_PRINT((ndo, "%s", istr)); 723 return; 724 } 725