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 1.3 2017/02/05 04:05:05 spz 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)); 360 361 /* Process the TLVs in the body */ 362 i = 0; 363 while(i < bodylen) { 364 const u_char *message; 365 u_int type, len; 366 367 message = cp + 4 + i; 368 369 ND_TCHECK2(*message, 1); 370 if((type = message[0]) == MESSAGE_PAD1) { 371 ND_PRINT((ndo, ndo->ndo_vflag ? "\n\tPad 1" : " pad1")); 372 i += 1; 373 continue; 374 } 375 376 ND_TCHECK2(*message, 2); 377 ICHECK(i, 2); 378 len = message[1]; 379 380 ND_TCHECK2(*message, 2 + len); 381 ICHECK(i, 2 + len); 382 383 switch(type) { 384 case MESSAGE_PADN: { 385 if (!ndo->ndo_vflag) 386 ND_PRINT((ndo, " padN")); 387 else 388 ND_PRINT((ndo, "\n\tPad %d", len + 2)); 389 } 390 break; 391 392 case MESSAGE_ACK_REQ: { 393 u_short nonce, interval; 394 if (!ndo->ndo_vflag) 395 ND_PRINT((ndo, " ack-req")); 396 else { 397 ND_PRINT((ndo, "\n\tAcknowledgment Request ")); 398 if(len < 6) goto invalid; 399 nonce = EXTRACT_16BITS(message + 4); 400 interval = EXTRACT_16BITS(message + 6); 401 ND_PRINT((ndo, "%04x %s", nonce, format_interval(interval))); 402 } 403 } 404 break; 405 406 case MESSAGE_ACK: { 407 u_short nonce; 408 if (!ndo->ndo_vflag) 409 ND_PRINT((ndo, " ack")); 410 else { 411 ND_PRINT((ndo, "\n\tAcknowledgment ")); 412 if(len < 2) goto invalid; 413 nonce = EXTRACT_16BITS(message + 2); 414 ND_PRINT((ndo, "%04x", nonce)); 415 } 416 } 417 break; 418 419 case MESSAGE_HELLO: { 420 u_short seqno, interval; 421 if (!ndo->ndo_vflag) 422 ND_PRINT((ndo, " hello")); 423 else { 424 ND_PRINT((ndo, "\n\tHello ")); 425 if(len < 6) goto invalid; 426 seqno = EXTRACT_16BITS(message + 4); 427 interval = EXTRACT_16BITS(message + 6); 428 ND_PRINT((ndo, "seqno %u interval %s", seqno, format_interval(interval))); 429 /* Extra data. */ 430 if(len > 6) 431 subtlvs_print(ndo, message + 8, message + 2 + len, type); 432 } 433 } 434 break; 435 436 case MESSAGE_IHU: { 437 unsigned short txcost, interval; 438 if (!ndo->ndo_vflag) 439 ND_PRINT((ndo, " ihu")); 440 else { 441 u_char address[16]; 442 int rc; 443 ND_PRINT((ndo, "\n\tIHU ")); 444 if(len < 6) goto invalid; 445 txcost = EXTRACT_16BITS(message + 4); 446 interval = EXTRACT_16BITS(message + 6); 447 rc = network_address(message[2], message + 8, len - 6, address); 448 if(rc < 0) { ND_PRINT((ndo, "%s", tstr)); break; } 449 ND_PRINT((ndo, "%s txcost %u interval %s", 450 format_address(ndo, address), txcost, format_interval(interval))); 451 /* Extra data. */ 452 if((u_int)rc < len - 6) 453 subtlvs_print(ndo, message + 8 + rc, message + 2 + len, 454 type); 455 } 456 } 457 break; 458 459 case MESSAGE_ROUTER_ID: { 460 if (!ndo->ndo_vflag) 461 ND_PRINT((ndo, " router-id")); 462 else { 463 ND_PRINT((ndo, "\n\tRouter Id")); 464 if(len < 10) goto invalid; 465 ND_PRINT((ndo, " %s", format_id(message + 4))); 466 } 467 } 468 break; 469 470 case MESSAGE_NH: { 471 if (!ndo->ndo_vflag) 472 ND_PRINT((ndo, " nh")); 473 else { 474 int rc; 475 u_char nh[16]; 476 ND_PRINT((ndo, "\n\tNext Hop")); 477 if(len < 2) goto invalid; 478 rc = network_address(message[2], message + 4, len - 2, nh); 479 if(rc < 0) goto invalid; 480 ND_PRINT((ndo, " %s", format_address(ndo, nh))); 481 } 482 } 483 break; 484 485 case MESSAGE_UPDATE: { 486 if (!ndo->ndo_vflag) { 487 ND_PRINT((ndo, " update")); 488 if(len < 1) 489 ND_PRINT((ndo, "/truncated")); 490 else 491 ND_PRINT((ndo, "%s%s%s", 492 (message[3] & 0x80) ? "/prefix": "", 493 (message[3] & 0x40) ? "/id" : "", 494 (message[3] & 0x3f) ? "/unknown" : "")); 495 } else { 496 u_short interval, seqno, metric; 497 u_char plen; 498 int rc; 499 u_char prefix[16]; 500 ND_PRINT((ndo, "\n\tUpdate")); 501 if(len < 10) goto invalid; 502 plen = message[4] + (message[2] == 1 ? 96 : 0); 503 rc = network_prefix(message[2], message[4], message[5], 504 message + 12, 505 message[2] == 1 ? v4_prefix : v6_prefix, 506 len - 10, prefix); 507 if(rc < 0) goto invalid; 508 interval = EXTRACT_16BITS(message + 6); 509 seqno = EXTRACT_16BITS(message + 8); 510 metric = EXTRACT_16BITS(message + 10); 511 ND_PRINT((ndo, "%s%s%s %s metric %u seqno %u interval %s", 512 (message[3] & 0x80) ? "/prefix": "", 513 (message[3] & 0x40) ? "/id" : "", 514 (message[3] & 0x3f) ? "/unknown" : "", 515 format_prefix(ndo, prefix, plen), 516 metric, seqno, format_interval_update(interval))); 517 if(message[3] & 0x80) { 518 if(message[2] == 1) 519 memcpy(v4_prefix, prefix, 16); 520 else 521 memcpy(v6_prefix, prefix, 16); 522 } 523 /* extra data? */ 524 if((u_int)rc < len - 10) 525 subtlvs_print(ndo, message + 12 + rc, message + 2 + len, type); 526 } 527 } 528 break; 529 530 case MESSAGE_REQUEST: { 531 if (!ndo->ndo_vflag) 532 ND_PRINT((ndo, " request")); 533 else { 534 int rc; 535 u_char prefix[16], plen; 536 ND_PRINT((ndo, "\n\tRequest ")); 537 if(len < 2) goto invalid; 538 plen = message[3] + (message[2] == 1 ? 96 : 0); 539 rc = network_prefix(message[2], message[3], 0, 540 message + 4, NULL, len - 2, prefix); 541 if(rc < 0) goto invalid; 542 ND_PRINT((ndo, "for %s", 543 message[2] == 0 ? "any" : format_prefix(ndo, prefix, plen))); 544 } 545 } 546 break; 547 548 case MESSAGE_MH_REQUEST : { 549 if (!ndo->ndo_vflag) 550 ND_PRINT((ndo, " mh-request")); 551 else { 552 int rc; 553 u_short seqno; 554 u_char prefix[16], plen; 555 ND_PRINT((ndo, "\n\tMH-Request ")); 556 if(len < 14) goto invalid; 557 seqno = EXTRACT_16BITS(message + 4); 558 rc = network_prefix(message[2], message[3], 0, 559 message + 16, NULL, len - 14, prefix); 560 if(rc < 0) goto invalid; 561 plen = message[3] + (message[2] == 1 ? 96 : 0); 562 ND_PRINT((ndo, "(%u hops) for %s seqno %u id %s", 563 message[6], format_prefix(ndo, prefix, plen), 564 seqno, format_id(message + 8))); 565 } 566 } 567 break; 568 case MESSAGE_TSPC : 569 if (!ndo->ndo_vflag) 570 ND_PRINT((ndo, " tspc")); 571 else { 572 ND_PRINT((ndo, "\n\tTS/PC ")); 573 if(len < 6) goto invalid; 574 ND_PRINT((ndo, "timestamp %u packetcounter %u", EXTRACT_32BITS (message + 4), 575 EXTRACT_16BITS(message + 2))); 576 } 577 break; 578 case MESSAGE_HMAC : { 579 if (!ndo->ndo_vflag) 580 ND_PRINT((ndo, " hmac")); 581 else { 582 unsigned j; 583 ND_PRINT((ndo, "\n\tHMAC ")); 584 if(len < 18) goto invalid; 585 ND_PRINT((ndo, "key-id %u digest-%u ", EXTRACT_16BITS(message + 2), len - 2)); 586 for (j = 0; j < len - 2; j++) 587 ND_PRINT((ndo, "%02X", message[4 + j])); 588 } 589 } 590 break; 591 592 case MESSAGE_UPDATE_SRC_SPECIFIC : { 593 if(!ndo->ndo_vflag) { 594 ND_PRINT((ndo, " ss-update")); 595 } else { 596 u_char prefix[16], src_prefix[16]; 597 u_short interval, seqno, metric; 598 u_char ae, plen, src_plen, omitted; 599 int rc; 600 int parsed_len = 10; 601 ND_PRINT((ndo, "\n\tSS-Update")); 602 if(len < 10) goto invalid; 603 ae = message[2]; 604 src_plen = message[3]; 605 plen = message[4]; 606 omitted = message[5]; 607 interval = EXTRACT_16BITS(message + 6); 608 seqno = EXTRACT_16BITS(message + 8); 609 metric = EXTRACT_16BITS(message + 10); 610 rc = network_prefix(ae, plen, omitted, message + 2 + parsed_len, 611 ae == 1 ? v4_prefix : v6_prefix, 612 len - parsed_len, prefix); 613 if(rc < 0) goto invalid; 614 if(ae == 1) 615 plen += 96; 616 parsed_len += rc; 617 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 618 NULL, len - parsed_len, src_prefix); 619 if(rc < 0) goto invalid; 620 if(ae == 1) 621 src_plen += 96; 622 parsed_len += rc; 623 624 ND_PRINT((ndo, " %s from", format_prefix(ndo, prefix, plen))); 625 ND_PRINT((ndo, " %s metric %u seqno %u interval %s", 626 format_prefix(ndo, src_prefix, src_plen), 627 metric, seqno, format_interval_update(interval))); 628 /* extra data? */ 629 if((u_int)parsed_len < len) 630 subtlvs_print(ndo, message + 2 + parsed_len, 631 message + 2 + len, type); 632 } 633 } 634 break; 635 636 case MESSAGE_REQUEST_SRC_SPECIFIC : { 637 if(!ndo->ndo_vflag) 638 ND_PRINT((ndo, " ss-request")); 639 else { 640 int rc, parsed_len = 3; 641 u_char ae, plen, src_plen, prefix[16], src_prefix[16]; 642 ND_PRINT((ndo, "\n\tSS-Request ")); 643 if(len < 3) goto invalid; 644 ae = message[2]; 645 plen = message[3]; 646 src_plen = message[4]; 647 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 648 NULL, len - parsed_len, prefix); 649 if(rc < 0) goto invalid; 650 if(ae == 1) 651 plen += 96; 652 parsed_len += rc; 653 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 654 NULL, len - parsed_len, src_prefix); 655 if(rc < 0) goto invalid; 656 if(ae == 1) 657 src_plen += 96; 658 parsed_len += rc; 659 if(ae == 0) { 660 ND_PRINT((ndo, "for any")); 661 } else { 662 ND_PRINT((ndo, "for (%s, ", format_prefix(ndo, prefix, plen))); 663 ND_PRINT((ndo, "%s)", format_prefix(ndo, src_prefix, src_plen))); 664 } 665 } 666 } 667 break; 668 669 case MESSAGE_MH_REQUEST_SRC_SPECIFIC : { 670 if(!ndo->ndo_vflag) 671 ND_PRINT((ndo, " ss-mh-request")); 672 else { 673 int rc, parsed_len = 14; 674 u_short seqno; 675 u_char ae, plen, src_plen, prefix[16], src_prefix[16], hopc; 676 const u_char *router_id = NULL; 677 ND_PRINT((ndo, "\n\tSS-MH-Request ")); 678 if(len < 14) goto invalid; 679 ae = message[2]; 680 plen = message[3]; 681 seqno = EXTRACT_16BITS(message + 4); 682 hopc = message[6]; 683 src_plen = message[7]; 684 router_id = message + 8; 685 rc = network_prefix(ae, plen, 0, message + 2 + parsed_len, 686 NULL, len - parsed_len, prefix); 687 if(rc < 0) goto invalid; 688 if(ae == 1) 689 plen += 96; 690 parsed_len += rc; 691 rc = network_prefix(ae, src_plen, 0, message + 2 + parsed_len, 692 NULL, len - parsed_len, src_prefix); 693 if(rc < 0) goto invalid; 694 if(ae == 1) 695 src_plen += 96; 696 ND_PRINT((ndo, "(%u hops) for (%s, ", 697 hopc, format_prefix(ndo, prefix, plen))); 698 ND_PRINT((ndo, "%s) seqno %u id %s", 699 format_prefix(ndo, src_prefix, src_plen), 700 seqno, format_id(router_id))); 701 } 702 } 703 break; 704 705 default: 706 if (!ndo->ndo_vflag) 707 ND_PRINT((ndo, " unknown")); 708 else 709 ND_PRINT((ndo, "\n\tUnknown message type %d", type)); 710 } 711 i += len + 2; 712 } 713 return; 714 715 trunc: 716 ND_PRINT((ndo, " %s", tstr)); 717 return; 718 719 invalid: 720 ND_PRINT((ndo, "%s", istr)); 721 return; 722 } 723