print-bootp.c revision 356341
1/* 2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 */ 21 22/* \summary: BOOTP and IPv4 DHCP printer */ 23 24#ifdef HAVE_CONFIG_H 25#include "config.h" 26#endif 27 28#include <netdissect-stdinc.h> 29 30#include <string.h> 31 32#include "netdissect.h" 33#include "addrtoname.h" 34#include "extract.h" 35 36static const char tstr[] = " [|bootp]"; 37 38/* 39 * Bootstrap Protocol (BOOTP). RFC951 and RFC1048. 40 * 41 * This file specifies the "implementation-independent" BOOTP protocol 42 * information which is common to both client and server. 43 * 44 * Copyright 1988 by Carnegie Mellon. 45 * 46 * Permission to use, copy, modify, and distribute this program for any 47 * purpose and without fee is hereby granted, provided that this copyright 48 * and permission notice appear on all copies and supporting documentation, 49 * the name of Carnegie Mellon not be used in advertising or publicity 50 * pertaining to distribution of the program without specific prior 51 * permission, and notice be given in supporting documentation that copying 52 * and distribution is by permission of Carnegie Mellon and Stanford 53 * University. Carnegie Mellon makes no representations about the 54 * suitability of this software for any purpose. It is provided "as is" 55 * without express or implied warranty. 56 */ 57 58struct bootp { 59 uint8_t bp_op; /* packet opcode type */ 60 uint8_t bp_htype; /* hardware addr type */ 61 uint8_t bp_hlen; /* hardware addr length */ 62 uint8_t bp_hops; /* gateway hops */ 63 uint32_t bp_xid; /* transaction ID */ 64 uint16_t bp_secs; /* seconds since boot began */ 65 uint16_t bp_flags; /* flags - see bootp_flag_values[] 66 in print-bootp.c */ 67 struct in_addr bp_ciaddr; /* client IP address */ 68 struct in_addr bp_yiaddr; /* 'your' IP address */ 69 struct in_addr bp_siaddr; /* server IP address */ 70 struct in_addr bp_giaddr; /* gateway IP address */ 71 uint8_t bp_chaddr[16]; /* client hardware address */ 72 uint8_t bp_sname[64]; /* server host name */ 73 uint8_t bp_file[128]; /* boot file name */ 74 uint8_t bp_vend[64]; /* vendor-specific area */ 75} UNALIGNED; 76 77#define BOOTPREPLY 2 78#define BOOTPREQUEST 1 79 80/* 81 * Vendor magic cookie (v_magic) for CMU 82 */ 83#define VM_CMU "CMU" 84 85/* 86 * Vendor magic cookie (v_magic) for RFC1048 87 */ 88#define VM_RFC1048 { 99, 130, 83, 99 } 89 90/* 91 * RFC1048 tag values used to specify what information is being supplied in 92 * the vendor field of the packet. 93 */ 94 95#define TAG_PAD ((uint8_t) 0) 96#define TAG_SUBNET_MASK ((uint8_t) 1) 97#define TAG_TIME_OFFSET ((uint8_t) 2) 98#define TAG_GATEWAY ((uint8_t) 3) 99#define TAG_TIME_SERVER ((uint8_t) 4) 100#define TAG_NAME_SERVER ((uint8_t) 5) 101#define TAG_DOMAIN_SERVER ((uint8_t) 6) 102#define TAG_LOG_SERVER ((uint8_t) 7) 103#define TAG_COOKIE_SERVER ((uint8_t) 8) 104#define TAG_LPR_SERVER ((uint8_t) 9) 105#define TAG_IMPRESS_SERVER ((uint8_t) 10) 106#define TAG_RLP_SERVER ((uint8_t) 11) 107#define TAG_HOSTNAME ((uint8_t) 12) 108#define TAG_BOOTSIZE ((uint8_t) 13) 109#define TAG_END ((uint8_t) 255) 110/* RFC1497 tags */ 111#define TAG_DUMPPATH ((uint8_t) 14) 112#define TAG_DOMAINNAME ((uint8_t) 15) 113#define TAG_SWAP_SERVER ((uint8_t) 16) 114#define TAG_ROOTPATH ((uint8_t) 17) 115#define TAG_EXTPATH ((uint8_t) 18) 116/* RFC2132 */ 117#define TAG_IP_FORWARD ((uint8_t) 19) 118#define TAG_NL_SRCRT ((uint8_t) 20) 119#define TAG_PFILTERS ((uint8_t) 21) 120#define TAG_REASS_SIZE ((uint8_t) 22) 121#define TAG_DEF_TTL ((uint8_t) 23) 122#define TAG_MTU_TIMEOUT ((uint8_t) 24) 123#define TAG_MTU_TABLE ((uint8_t) 25) 124#define TAG_INT_MTU ((uint8_t) 26) 125#define TAG_LOCAL_SUBNETS ((uint8_t) 27) 126#define TAG_BROAD_ADDR ((uint8_t) 28) 127#define TAG_DO_MASK_DISC ((uint8_t) 29) 128#define TAG_SUPPLY_MASK ((uint8_t) 30) 129#define TAG_DO_RDISC ((uint8_t) 31) 130#define TAG_RTR_SOL_ADDR ((uint8_t) 32) 131#define TAG_STATIC_ROUTE ((uint8_t) 33) 132#define TAG_USE_TRAILERS ((uint8_t) 34) 133#define TAG_ARP_TIMEOUT ((uint8_t) 35) 134#define TAG_ETH_ENCAP ((uint8_t) 36) 135#define TAG_TCP_TTL ((uint8_t) 37) 136#define TAG_TCP_KEEPALIVE ((uint8_t) 38) 137#define TAG_KEEPALIVE_GO ((uint8_t) 39) 138#define TAG_NIS_DOMAIN ((uint8_t) 40) 139#define TAG_NIS_SERVERS ((uint8_t) 41) 140#define TAG_NTP_SERVERS ((uint8_t) 42) 141#define TAG_VENDOR_OPTS ((uint8_t) 43) 142#define TAG_NETBIOS_NS ((uint8_t) 44) 143#define TAG_NETBIOS_DDS ((uint8_t) 45) 144#define TAG_NETBIOS_NODE ((uint8_t) 46) 145#define TAG_NETBIOS_SCOPE ((uint8_t) 47) 146#define TAG_XWIN_FS ((uint8_t) 48) 147#define TAG_XWIN_DM ((uint8_t) 49) 148#define TAG_NIS_P_DOMAIN ((uint8_t) 64) 149#define TAG_NIS_P_SERVERS ((uint8_t) 65) 150#define TAG_MOBILE_HOME ((uint8_t) 68) 151#define TAG_SMPT_SERVER ((uint8_t) 69) 152#define TAG_POP3_SERVER ((uint8_t) 70) 153#define TAG_NNTP_SERVER ((uint8_t) 71) 154#define TAG_WWW_SERVER ((uint8_t) 72) 155#define TAG_FINGER_SERVER ((uint8_t) 73) 156#define TAG_IRC_SERVER ((uint8_t) 74) 157#define TAG_STREETTALK_SRVR ((uint8_t) 75) 158#define TAG_STREETTALK_STDA ((uint8_t) 76) 159/* DHCP options */ 160#define TAG_REQUESTED_IP ((uint8_t) 50) 161#define TAG_IP_LEASE ((uint8_t) 51) 162#define TAG_OPT_OVERLOAD ((uint8_t) 52) 163#define TAG_TFTP_SERVER ((uint8_t) 66) 164#define TAG_BOOTFILENAME ((uint8_t) 67) 165#define TAG_DHCP_MESSAGE ((uint8_t) 53) 166#define TAG_SERVER_ID ((uint8_t) 54) 167#define TAG_PARM_REQUEST ((uint8_t) 55) 168#define TAG_MESSAGE ((uint8_t) 56) 169#define TAG_MAX_MSG_SIZE ((uint8_t) 57) 170#define TAG_RENEWAL_TIME ((uint8_t) 58) 171#define TAG_REBIND_TIME ((uint8_t) 59) 172#define TAG_VENDOR_CLASS ((uint8_t) 60) 173#define TAG_CLIENT_ID ((uint8_t) 61) 174/* RFC 2241 */ 175#define TAG_NDS_SERVERS ((uint8_t) 85) 176#define TAG_NDS_TREE_NAME ((uint8_t) 86) 177#define TAG_NDS_CONTEXT ((uint8_t) 87) 178/* RFC 2242 */ 179#define TAG_NDS_IPDOMAIN ((uint8_t) 62) 180#define TAG_NDS_IPINFO ((uint8_t) 63) 181/* RFC 2485 */ 182#define TAG_OPEN_GROUP_UAP ((uint8_t) 98) 183/* RFC 2563 */ 184#define TAG_DISABLE_AUTOCONF ((uint8_t) 116) 185/* RFC 2610 */ 186#define TAG_SLP_DA ((uint8_t) 78) 187#define TAG_SLP_SCOPE ((uint8_t) 79) 188/* RFC 2937 */ 189#define TAG_NS_SEARCH ((uint8_t) 117) 190/* RFC 3004 - The User Class Option for DHCP */ 191#define TAG_USER_CLASS ((uint8_t) 77) 192/* RFC 3011 */ 193#define TAG_IP4_SUBNET_SELECT ((uint8_t) 118) 194/* RFC 3442 */ 195#define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121) 196#define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249) 197/* RFC 5859 - TFTP Server Address Option for DHCPv4 */ 198#define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150) 199/* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */ 200#define TAG_SLP_NAMING_AUTH ((uint8_t) 80) 201#define TAG_CLIENT_FQDN ((uint8_t) 81) 202#define TAG_AGENT_CIRCUIT ((uint8_t) 82) 203#define TAG_AGENT_REMOTE ((uint8_t) 83) 204#define TAG_AGENT_MASK ((uint8_t) 84) 205#define TAG_TZ_STRING ((uint8_t) 88) 206#define TAG_FQDN_OPTION ((uint8_t) 89) 207#define TAG_AUTH ((uint8_t) 90) 208#define TAG_VINES_SERVERS ((uint8_t) 91) 209#define TAG_SERVER_RANK ((uint8_t) 92) 210#define TAG_CLIENT_ARCH ((uint8_t) 93) 211#define TAG_CLIENT_NDI ((uint8_t) 94) 212#define TAG_CLIENT_GUID ((uint8_t) 97) 213#define TAG_LDAP_URL ((uint8_t) 95) 214#define TAG_6OVER4 ((uint8_t) 96) 215/* RFC 4833, TZ codes */ 216#define TAG_TZ_PCODE ((uint8_t) 100) 217#define TAG_TZ_TCODE ((uint8_t) 101) 218#define TAG_IPX_COMPAT ((uint8_t) 110) 219#define TAG_NETINFO_PARENT ((uint8_t) 112) 220#define TAG_NETINFO_PARENT_TAG ((uint8_t) 113) 221#define TAG_URL ((uint8_t) 114) 222#define TAG_FAILOVER ((uint8_t) 115) 223#define TAG_EXTENDED_REQUEST ((uint8_t) 126) 224#define TAG_EXTENDED_OPTION ((uint8_t) 127) 225#define TAG_MUDURL ((uint8_t) 161) 226 227/* DHCP Message types (values for TAG_DHCP_MESSAGE option) */ 228#define DHCPDISCOVER 1 229#define DHCPOFFER 2 230#define DHCPREQUEST 3 231#define DHCPDECLINE 4 232#define DHCPACK 5 233#define DHCPNAK 6 234#define DHCPRELEASE 7 235#define DHCPINFORM 8 236 237/* 238 * "vendor" data permitted for CMU bootp clients. 239 */ 240 241struct cmu_vend { 242 uint8_t v_magic[4]; /* magic number */ 243 uint32_t v_flags; /* flags/opcodes, etc. */ 244 struct in_addr v_smask; /* Subnet mask */ 245 struct in_addr v_dgate; /* Default gateway */ 246 struct in_addr v_dns1, v_dns2; /* Domain name servers */ 247 struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */ 248 struct in_addr v_ts1, v_ts2; /* Time servers */ 249 uint8_t v_unused[24]; /* currently unused */ 250} UNALIGNED; 251 252 253/* v_flags values */ 254#define VF_SMASK 1 /* Subnet mask field contains valid data */ 255 256/* RFC 4702 DHCP Client FQDN Option */ 257 258#define CLIENT_FQDN_FLAGS_S 0x01 259#define CLIENT_FQDN_FLAGS_O 0x02 260#define CLIENT_FQDN_FLAGS_E 0x04 261#define CLIENT_FQDN_FLAGS_N 0x08 262/* end of original bootp.h */ 263 264static void rfc1048_print(netdissect_options *, const u_char *); 265static void cmu_print(netdissect_options *, const u_char *); 266static char *client_fqdn_flags(u_int flags); 267 268static const struct tok bootp_flag_values[] = { 269 { 0x8000, "Broadcast" }, 270 { 0, NULL} 271}; 272 273static const struct tok bootp_op_values[] = { 274 { BOOTPREQUEST, "Request" }, 275 { BOOTPREPLY, "Reply" }, 276 { 0, NULL} 277}; 278 279/* 280 * Print bootp requests 281 */ 282void 283bootp_print(netdissect_options *ndo, 284 register const u_char *cp, u_int length) 285{ 286 register const struct bootp *bp; 287 static const u_char vm_cmu[4] = VM_CMU; 288 static const u_char vm_rfc1048[4] = VM_RFC1048; 289 290 bp = (const struct bootp *)cp; 291 ND_TCHECK(bp->bp_op); 292 293 ND_PRINT((ndo, "BOOTP/DHCP, %s", 294 tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op))); 295 296 ND_TCHECK(bp->bp_hlen); 297 if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) { 298 ND_TCHECK2(bp->bp_chaddr[0], 6); 299 ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr))); 300 } 301 302 ND_PRINT((ndo, ", length %u", length)); 303 304 if (!ndo->ndo_vflag) 305 return; 306 307 ND_TCHECK(bp->bp_secs); 308 309 /* The usual hardware address type is 1 (10Mb Ethernet) */ 310 if (bp->bp_htype != 1) 311 ND_PRINT((ndo, ", htype %d", bp->bp_htype)); 312 313 /* The usual length for 10Mb Ethernet address is 6 bytes */ 314 if (bp->bp_htype != 1 || bp->bp_hlen != 6) 315 ND_PRINT((ndo, ", hlen %d", bp->bp_hlen)); 316 317 /* Only print interesting fields */ 318 if (bp->bp_hops) 319 ND_PRINT((ndo, ", hops %d", bp->bp_hops)); 320 if (EXTRACT_32BITS(&bp->bp_xid)) 321 ND_PRINT((ndo, ", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid))); 322 if (EXTRACT_16BITS(&bp->bp_secs)) 323 ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs))); 324 325 ND_TCHECK(bp->bp_flags); 326 ND_PRINT((ndo, ", Flags [%s]", 327 bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)))); 328 if (ndo->ndo_vflag > 1) 329 ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags))); 330 331 /* Client's ip address */ 332 ND_TCHECK(bp->bp_ciaddr); 333 if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr)) 334 ND_PRINT((ndo, "\n\t Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr))); 335 336 /* 'your' ip address (bootp client) */ 337 ND_TCHECK(bp->bp_yiaddr); 338 if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr)) 339 ND_PRINT((ndo, "\n\t Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr))); 340 341 /* Server's ip address */ 342 ND_TCHECK(bp->bp_siaddr); 343 if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr)) 344 ND_PRINT((ndo, "\n\t Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr))); 345 346 /* Gateway's ip address */ 347 ND_TCHECK(bp->bp_giaddr); 348 if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr)) 349 ND_PRINT((ndo, "\n\t Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr))); 350 351 /* Client's Ethernet address */ 352 if (bp->bp_htype == 1 && bp->bp_hlen == 6) { 353 ND_TCHECK2(bp->bp_chaddr[0], 6); 354 ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr))); 355 } 356 357 ND_TCHECK2(bp->bp_sname[0], 1); /* check first char only */ 358 if (*bp->bp_sname) { 359 ND_PRINT((ndo, "\n\t sname \"")); 360 if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof bp->bp_sname, 361 ndo->ndo_snapend) == 0) { 362 ND_PRINT((ndo, "\"")); 363 ND_PRINT((ndo, "%s", tstr + 1)); 364 return; 365 } 366 ND_PRINT((ndo, "\"")); 367 } 368 ND_TCHECK2(bp->bp_file[0], 1); /* check first char only */ 369 if (*bp->bp_file) { 370 ND_PRINT((ndo, "\n\t file \"")); 371 if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof bp->bp_file, 372 ndo->ndo_snapend) == 0) { 373 ND_PRINT((ndo, "\"")); 374 ND_PRINT((ndo, "%s", tstr + 1)); 375 return; 376 } 377 ND_PRINT((ndo, "\"")); 378 } 379 380 /* Decode the vendor buffer */ 381 ND_TCHECK2(bp->bp_vend[0], 4); 382 if (memcmp((const char *)bp->bp_vend, vm_rfc1048, 383 sizeof(uint32_t)) == 0) 384 rfc1048_print(ndo, bp->bp_vend); 385 else if (memcmp((const char *)bp->bp_vend, vm_cmu, 386 sizeof(uint32_t)) == 0) 387 cmu_print(ndo, bp->bp_vend); 388 else { 389 uint32_t ul; 390 391 ND_TCHECK_32BITS(&bp->bp_vend); 392 ul = EXTRACT_32BITS(&bp->bp_vend); 393 if (ul != 0) 394 ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul)); 395 } 396 397 return; 398trunc: 399 ND_PRINT((ndo, "%s", tstr)); 400} 401 402/* 403 * The first character specifies the format to print: 404 * i - ip address (32 bits) 405 * p - ip address pairs (32 bits + 32 bits) 406 * l - long (32 bits) 407 * L - unsigned long (32 bits) 408 * s - short (16 bits) 409 * b - period-seperated decimal bytes (variable length) 410 * x - colon-seperated hex bytes (variable length) 411 * a - ascii string (variable length) 412 * B - on/off (8 bits) 413 * $ - special (explicit code to handle) 414 */ 415static const struct tok tag2str[] = { 416/* RFC1048 tags */ 417 { TAG_PAD, " PAD" }, 418 { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */ 419 { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */ 420 { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */ 421 { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */ 422 { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */ 423 { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */ 424 { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */ 425 { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */ 426 { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */ 427 { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */ 428 { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */ 429 { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */ 430 { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */ 431 { TAG_END, " END" }, 432/* RFC1497 tags */ 433 { TAG_DUMPPATH, "aDP" }, 434 { TAG_DOMAINNAME, "aDomain-Name" }, 435 { TAG_SWAP_SERVER, "iSS" }, 436 { TAG_ROOTPATH, "aRP" }, 437 { TAG_EXTPATH, "aEP" }, 438/* RFC2132 tags */ 439 { TAG_IP_FORWARD, "BIPF" }, 440 { TAG_NL_SRCRT, "BSRT" }, 441 { TAG_PFILTERS, "pPF" }, 442 { TAG_REASS_SIZE, "sRSZ" }, 443 { TAG_DEF_TTL, "bTTL" }, 444 { TAG_MTU_TIMEOUT, "lMTU-Timeout" }, 445 { TAG_MTU_TABLE, "sMTU-Table" }, 446 { TAG_INT_MTU, "sMTU" }, 447 { TAG_LOCAL_SUBNETS, "BLSN" }, 448 { TAG_BROAD_ADDR, "iBR" }, 449 { TAG_DO_MASK_DISC, "BMD" }, 450 { TAG_SUPPLY_MASK, "BMS" }, 451 { TAG_DO_RDISC, "BRouter-Discovery" }, 452 { TAG_RTR_SOL_ADDR, "iRSA" }, 453 { TAG_STATIC_ROUTE, "pStatic-Route" }, 454 { TAG_USE_TRAILERS, "BUT" }, 455 { TAG_ARP_TIMEOUT, "lAT" }, 456 { TAG_ETH_ENCAP, "BIE" }, 457 { TAG_TCP_TTL, "bTT" }, 458 { TAG_TCP_KEEPALIVE, "lKI" }, 459 { TAG_KEEPALIVE_GO, "BKG" }, 460 { TAG_NIS_DOMAIN, "aYD" }, 461 { TAG_NIS_SERVERS, "iYS" }, 462 { TAG_NTP_SERVERS, "iNTP" }, 463 { TAG_VENDOR_OPTS, "bVendor-Option" }, 464 { TAG_NETBIOS_NS, "iNetbios-Name-Server" }, 465 { TAG_NETBIOS_DDS, "iWDD" }, 466 { TAG_NETBIOS_NODE, "$Netbios-Node" }, 467 { TAG_NETBIOS_SCOPE, "aNetbios-Scope" }, 468 { TAG_XWIN_FS, "iXFS" }, 469 { TAG_XWIN_DM, "iXDM" }, 470 { TAG_NIS_P_DOMAIN, "sN+D" }, 471 { TAG_NIS_P_SERVERS, "iN+S" }, 472 { TAG_MOBILE_HOME, "iMH" }, 473 { TAG_SMPT_SERVER, "iSMTP" }, 474 { TAG_POP3_SERVER, "iPOP3" }, 475 { TAG_NNTP_SERVER, "iNNTP" }, 476 { TAG_WWW_SERVER, "iWWW" }, 477 { TAG_FINGER_SERVER, "iFG" }, 478 { TAG_IRC_SERVER, "iIRC" }, 479 { TAG_STREETTALK_SRVR, "iSTS" }, 480 { TAG_STREETTALK_STDA, "iSTDA" }, 481 { TAG_REQUESTED_IP, "iRequested-IP" }, 482 { TAG_IP_LEASE, "lLease-Time" }, 483 { TAG_OPT_OVERLOAD, "$OO" }, 484 { TAG_TFTP_SERVER, "aTFTP" }, 485 { TAG_BOOTFILENAME, "aBF" }, 486 { TAG_DHCP_MESSAGE, " DHCP-Message" }, 487 { TAG_SERVER_ID, "iServer-ID" }, 488 { TAG_PARM_REQUEST, "bParameter-Request" }, 489 { TAG_MESSAGE, "aMSG" }, 490 { TAG_MAX_MSG_SIZE, "sMSZ" }, 491 { TAG_RENEWAL_TIME, "lRN" }, 492 { TAG_REBIND_TIME, "lRB" }, 493 { TAG_VENDOR_CLASS, "aVendor-Class" }, 494 { TAG_CLIENT_ID, "$Client-ID" }, 495/* RFC 2485 */ 496 { TAG_OPEN_GROUP_UAP, "aUAP" }, 497/* RFC 2563 */ 498 { TAG_DISABLE_AUTOCONF, "BNOAUTO" }, 499/* RFC 2610 */ 500 { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */ 501 { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */ 502/* RFC 2937 */ 503 { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */ 504/* RFC 3004 - The User Class Option for DHCP */ 505 { TAG_USER_CLASS, "$User-Class" }, 506/* RFC 3011 */ 507 { TAG_IP4_SUBNET_SELECT, "iSUBNET" }, 508/* RFC 3442 */ 509 { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" }, 510 { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" }, 511/* RFC 5859 - TFTP Server Address Option for DHCPv4 */ 512 { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" }, 513/* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */ 514 { TAG_SLP_NAMING_AUTH, "aSLP-NA" }, 515 { TAG_CLIENT_FQDN, "$FQDN" }, 516 { TAG_AGENT_CIRCUIT, "$Agent-Information" }, 517 { TAG_AGENT_REMOTE, "bARMT" }, 518 { TAG_AGENT_MASK, "bAMSK" }, 519 { TAG_TZ_STRING, "aTZSTR" }, 520 { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */ 521 { TAG_AUTH, "bAUTH" }, /* XXX 'b' */ 522 { TAG_VINES_SERVERS, "iVINES" }, 523 { TAG_SERVER_RANK, "sRANK" }, 524 { TAG_CLIENT_ARCH, "sARCH" }, 525 { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */ 526 { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */ 527 { TAG_LDAP_URL, "aLDAP" }, 528 { TAG_6OVER4, "i6o4" }, 529 { TAG_TZ_PCODE, "aPOSIX-TZ" }, 530 { TAG_TZ_TCODE, "aTZ-Name" }, 531 { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */ 532 { TAG_NETINFO_PARENT, "iNI" }, 533 { TAG_NETINFO_PARENT_TAG, "aNITAG" }, 534 { TAG_URL, "aURL" }, 535 { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */ 536 { TAG_MUDURL, "aMUD-URL" }, 537 { 0, NULL } 538}; 539/* 2-byte extended tags */ 540static const struct tok xtag2str[] = { 541 { 0, NULL } 542}; 543 544/* DHCP "options overload" types */ 545static const struct tok oo2str[] = { 546 { 1, "file" }, 547 { 2, "sname" }, 548 { 3, "file+sname" }, 549 { 0, NULL } 550}; 551 552/* NETBIOS over TCP/IP node type options */ 553static const struct tok nbo2str[] = { 554 { 0x1, "b-node" }, 555 { 0x2, "p-node" }, 556 { 0x4, "m-node" }, 557 { 0x8, "h-node" }, 558 { 0, NULL } 559}; 560 561/* ARP Hardware types, for Client-ID option */ 562static const struct tok arp2str[] = { 563 { 0x1, "ether" }, 564 { 0x6, "ieee802" }, 565 { 0x7, "arcnet" }, 566 { 0xf, "frelay" }, 567 { 0x17, "strip" }, 568 { 0x18, "ieee1394" }, 569 { 0, NULL } 570}; 571 572static const struct tok dhcp_msg_values[] = { 573 { DHCPDISCOVER, "Discover" }, 574 { DHCPOFFER, "Offer" }, 575 { DHCPREQUEST, "Request" }, 576 { DHCPDECLINE, "Decline" }, 577 { DHCPACK, "ACK" }, 578 { DHCPNAK, "NACK" }, 579 { DHCPRELEASE, "Release" }, 580 { DHCPINFORM, "Inform" }, 581 { 0, NULL } 582}; 583 584#define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */ 585#define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */ 586#define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */ 587static const struct tok agent_suboption_values[] = { 588 { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" }, 589 { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" }, 590 { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" }, 591 { 0, NULL } 592}; 593 594 595static void 596rfc1048_print(netdissect_options *ndo, 597 register const u_char *bp) 598{ 599 register uint16_t tag; 600 register u_int len; 601 register const char *cp; 602 register char c; 603 int first, idx; 604 uint32_t ul; 605 uint16_t us; 606 uint8_t uc, subopt, suboptlen; 607 608 ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions")); 609 610 /* Step over magic cookie */ 611 ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp))); 612 bp += sizeof(int32_t); 613 614 /* Loop while we there is a tag left in the buffer */ 615 while (ND_TTEST2(*bp, 1)) { 616 tag = *bp++; 617 if (tag == TAG_PAD && ndo->ndo_vflag < 3) 618 continue; 619 if (tag == TAG_END && ndo->ndo_vflag < 3) 620 return; 621 if (tag == TAG_EXTENDED_OPTION) { 622 ND_TCHECK2(*(bp + 1), 2); 623 tag = EXTRACT_16BITS(bp + 1); 624 /* XXX we don't know yet if the IANA will 625 * preclude overlap of 1-byte and 2-byte spaces. 626 * If not, we need to offset tag after this step. 627 */ 628 cp = tok2str(xtag2str, "?xT%u", tag); 629 } else 630 cp = tok2str(tag2str, "?T%u", tag); 631 c = *cp++; 632 633 if (tag == TAG_PAD || tag == TAG_END) 634 len = 0; 635 else { 636 /* Get the length; check for truncation */ 637 ND_TCHECK2(*bp, 1); 638 len = *bp++; 639 } 640 641 ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len, 642 len > 0 ? ": " : "")); 643 644 if (tag == TAG_PAD && ndo->ndo_vflag > 2) { 645 u_int ntag = 1; 646 while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) { 647 bp++; 648 ntag++; 649 } 650 if (ntag > 1) 651 ND_PRINT((ndo, ", occurs %u", ntag)); 652 } 653 654 if (!ND_TTEST2(*bp, len)) { 655 ND_PRINT((ndo, "[|rfc1048 %u]", len)); 656 return; 657 } 658 659 if (tag == TAG_DHCP_MESSAGE && len == 1) { 660 uc = *bp++; 661 ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc))); 662 continue; 663 } 664 665 if (tag == TAG_PARM_REQUEST) { 666 idx = 0; 667 while (len-- > 0) { 668 uc = *bp++; 669 cp = tok2str(tag2str, "?Option %u", uc); 670 if (idx % 4 == 0) 671 ND_PRINT((ndo, "\n\t ")); 672 else 673 ND_PRINT((ndo, ", ")); 674 ND_PRINT((ndo, "%s", cp + 1)); 675 idx++; 676 } 677 continue; 678 } 679 680 if (tag == TAG_EXTENDED_REQUEST) { 681 first = 1; 682 while (len > 1) { 683 len -= 2; 684 us = EXTRACT_16BITS(bp); 685 bp += 2; 686 cp = tok2str(xtag2str, "?xT%u", us); 687 if (!first) 688 ND_PRINT((ndo, "+")); 689 ND_PRINT((ndo, "%s", cp + 1)); 690 first = 0; 691 } 692 continue; 693 } 694 695 /* Print data */ 696 if (c == '?') { 697 /* Base default formats for unknown tags on data size */ 698 if (len & 1) 699 c = 'b'; 700 else if (len & 2) 701 c = 's'; 702 else 703 c = 'l'; 704 } 705 first = 1; 706 switch (c) { 707 708 case 'a': 709 /* ascii strings */ 710 ND_PRINT((ndo, "\"")); 711 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 712 ND_PRINT((ndo, "\"")); 713 goto trunc; 714 } 715 ND_PRINT((ndo, "\"")); 716 bp += len; 717 len = 0; 718 break; 719 720 case 'i': 721 case 'l': 722 case 'L': 723 /* ip addresses/32-bit words */ 724 while (len >= sizeof(ul)) { 725 if (!first) 726 ND_PRINT((ndo, ",")); 727 ul = EXTRACT_32BITS(bp); 728 if (c == 'i') { 729 ul = htonl(ul); 730 ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul))); 731 } else if (c == 'L') 732 ND_PRINT((ndo, "%d", ul)); 733 else 734 ND_PRINT((ndo, "%u", ul)); 735 bp += sizeof(ul); 736 len -= sizeof(ul); 737 first = 0; 738 } 739 break; 740 741 case 'p': 742 /* IP address pairs */ 743 while (len >= 2*sizeof(ul)) { 744 if (!first) 745 ND_PRINT((ndo, ",")); 746 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 747 ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul))); 748 bp += sizeof(ul); 749 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 750 ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul))); 751 bp += sizeof(ul); 752 len -= 2*sizeof(ul); 753 first = 0; 754 } 755 break; 756 757 case 's': 758 /* shorts */ 759 while (len >= sizeof(us)) { 760 if (!first) 761 ND_PRINT((ndo, ",")); 762 us = EXTRACT_16BITS(bp); 763 ND_PRINT((ndo, "%u", us)); 764 bp += sizeof(us); 765 len -= sizeof(us); 766 first = 0; 767 } 768 break; 769 770 case 'B': 771 /* boolean */ 772 while (len > 0) { 773 if (!first) 774 ND_PRINT((ndo, ",")); 775 switch (*bp) { 776 case 0: 777 ND_PRINT((ndo, "N")); 778 break; 779 case 1: 780 ND_PRINT((ndo, "Y")); 781 break; 782 default: 783 ND_PRINT((ndo, "%u?", *bp)); 784 break; 785 } 786 ++bp; 787 --len; 788 first = 0; 789 } 790 break; 791 792 case 'b': 793 case 'x': 794 default: 795 /* Bytes */ 796 while (len > 0) { 797 if (!first) 798 ND_PRINT((ndo, c == 'x' ? ":" : ".")); 799 if (c == 'x') 800 ND_PRINT((ndo, "%02x", *bp)); 801 else 802 ND_PRINT((ndo, "%u", *bp)); 803 ++bp; 804 --len; 805 first = 0; 806 } 807 break; 808 809 case '$': 810 /* Guys we can't handle with one of the usual cases */ 811 switch (tag) { 812 813 case TAG_NETBIOS_NODE: 814 /* this option should be at least 1 byte long */ 815 if (len < 1) { 816 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 817 break; 818 } 819 tag = *bp++; 820 --len; 821 ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag))); 822 break; 823 824 case TAG_OPT_OVERLOAD: 825 /* this option should be at least 1 byte long */ 826 if (len < 1) { 827 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 828 break; 829 } 830 tag = *bp++; 831 --len; 832 ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag))); 833 break; 834 835 case TAG_CLIENT_FQDN: 836 /* this option should be at least 3 bytes long */ 837 if (len < 3) { 838 ND_PRINT((ndo, "ERROR: length < 3 bytes")); 839 bp += len; 840 len = 0; 841 break; 842 } 843 if (*bp) 844 ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp))); 845 bp++; 846 if (*bp || *(bp+1)) 847 ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1))); 848 bp += 2; 849 ND_PRINT((ndo, "\"")); 850 if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) { 851 ND_PRINT((ndo, "\"")); 852 goto trunc; 853 } 854 ND_PRINT((ndo, "\"")); 855 bp += len - 3; 856 len = 0; 857 break; 858 859 case TAG_CLIENT_ID: 860 { 861 int type; 862 863 /* this option should be at least 1 byte long */ 864 if (len < 1) { 865 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 866 break; 867 } 868 type = *bp++; 869 len--; 870 if (type == 0) { 871 ND_PRINT((ndo, "\"")); 872 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 873 ND_PRINT((ndo, "\"")); 874 goto trunc; 875 } 876 ND_PRINT((ndo, "\"")); 877 bp += len; 878 len = 0; 879 break; 880 } else { 881 ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type))); 882 while (len > 0) { 883 if (!first) 884 ND_PRINT((ndo, ":")); 885 ND_PRINT((ndo, "%02x", *bp)); 886 ++bp; 887 --len; 888 first = 0; 889 } 890 } 891 break; 892 } 893 894 case TAG_AGENT_CIRCUIT: 895 while (len >= 2) { 896 subopt = *bp++; 897 suboptlen = *bp++; 898 len -= 2; 899 if (suboptlen > len) { 900 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option", 901 tok2str(agent_suboption_values, "Unknown", subopt), 902 subopt, 903 suboptlen)); 904 bp += len; 905 len = 0; 906 break; 907 } 908 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ", 909 tok2str(agent_suboption_values, "Unknown", subopt), 910 subopt, 911 suboptlen)); 912 switch (subopt) { 913 914 case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */ 915 case AGENT_SUBOPTION_REMOTE_ID: 916 case AGENT_SUBOPTION_SUBSCRIBER_ID: 917 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) 918 goto trunc; 919 break; 920 921 default: 922 print_unknown_data(ndo, bp, "\n\t\t", suboptlen); 923 } 924 925 len -= suboptlen; 926 bp += suboptlen; 927 } 928 break; 929 930 case TAG_CLASSLESS_STATIC_RT: 931 case TAG_CLASSLESS_STA_RT_MS: 932 { 933 u_int mask_width, significant_octets, i; 934 935 /* this option should be at least 5 bytes long */ 936 if (len < 5) { 937 ND_PRINT((ndo, "ERROR: length < 5 bytes")); 938 bp += len; 939 len = 0; 940 break; 941 } 942 while (len > 0) { 943 if (!first) 944 ND_PRINT((ndo, ",")); 945 mask_width = *bp++; 946 len--; 947 /* mask_width <= 32 */ 948 if (mask_width > 32) { 949 ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width)); 950 bp += len; 951 len = 0; 952 break; 953 } 954 significant_octets = (mask_width + 7) / 8; 955 /* significant octets + router(4) */ 956 if (len < significant_octets + 4) { 957 ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4)); 958 bp += len; 959 len = 0; 960 break; 961 } 962 ND_PRINT((ndo, "(")); 963 if (mask_width == 0) 964 ND_PRINT((ndo, "default")); 965 else { 966 for (i = 0; i < significant_octets ; i++) { 967 if (i > 0) 968 ND_PRINT((ndo, ".")); 969 ND_PRINT((ndo, "%d", *bp++)); 970 } 971 for (i = significant_octets ; i < 4 ; i++) 972 ND_PRINT((ndo, ".0")); 973 ND_PRINT((ndo, "/%d", mask_width)); 974 } 975 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 976 ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul))); 977 bp += sizeof(ul); 978 len -= (significant_octets + 4); 979 first = 0; 980 } 981 break; 982 } 983 984 case TAG_USER_CLASS: 985 { 986 u_int suboptnumber = 1; 987 988 first = 1; 989 if (len < 2) { 990 ND_PRINT((ndo, "ERROR: length < 2 bytes")); 991 bp += len; 992 len = 0; 993 break; 994 } 995 while (len > 0) { 996 suboptlen = *bp++; 997 len--; 998 ND_PRINT((ndo, "\n\t ")); 999 ND_PRINT((ndo, "instance#%u: ", suboptnumber)); 1000 if (suboptlen == 0) { 1001 ND_PRINT((ndo, "ERROR: suboption length must be non-zero")); 1002 bp += len; 1003 len = 0; 1004 break; 1005 } 1006 if (len < suboptlen) { 1007 ND_PRINT((ndo, "ERROR: invalid option")); 1008 bp += len; 1009 len = 0; 1010 break; 1011 } 1012 ND_PRINT((ndo, "\"")); 1013 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) { 1014 ND_PRINT((ndo, "\"")); 1015 goto trunc; 1016 } 1017 ND_PRINT((ndo, "\"")); 1018 ND_PRINT((ndo, ", length %d", suboptlen)); 1019 suboptnumber++; 1020 len -= suboptlen; 1021 bp += suboptlen; 1022 } 1023 break; 1024 } 1025 1026 default: 1027 ND_PRINT((ndo, "[unknown special tag %u, size %u]", 1028 tag, len)); 1029 bp += len; 1030 len = 0; 1031 break; 1032 } 1033 break; 1034 } 1035 /* Data left over? */ 1036 if (len) { 1037 ND_PRINT((ndo, "\n\t trailing data length %u", len)); 1038 bp += len; 1039 } 1040 } 1041 return; 1042trunc: 1043 ND_PRINT((ndo, "|[rfc1048]")); 1044} 1045 1046static void 1047cmu_print(netdissect_options *ndo, 1048 register const u_char *bp) 1049{ 1050 register const struct cmu_vend *cmu; 1051 1052#define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \ 1053 if (cmu->m.s_addr != 0) \ 1054 ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); } 1055 1056 ND_PRINT((ndo, " vend-cmu")); 1057 cmu = (const struct cmu_vend *)bp; 1058 1059 /* Only print if there are unknown bits */ 1060 ND_TCHECK(cmu->v_flags); 1061 if ((cmu->v_flags & ~(VF_SMASK)) != 0) 1062 ND_PRINT((ndo, " F:0x%x", cmu->v_flags)); 1063 PRINTCMUADDR(v_dgate, "DG"); 1064 PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*"); 1065 PRINTCMUADDR(v_dns1, "NS1"); 1066 PRINTCMUADDR(v_dns2, "NS2"); 1067 PRINTCMUADDR(v_ins1, "IEN1"); 1068 PRINTCMUADDR(v_ins2, "IEN2"); 1069 PRINTCMUADDR(v_ts1, "TS1"); 1070 PRINTCMUADDR(v_ts2, "TS2"); 1071 return; 1072 1073trunc: 1074 ND_PRINT((ndo, "%s", tstr)); 1075#undef PRINTCMUADDR 1076} 1077 1078static char * 1079client_fqdn_flags(u_int flags) 1080{ 1081 static char buf[8+1]; 1082 int i = 0; 1083 1084 if (flags & CLIENT_FQDN_FLAGS_S) 1085 buf[i++] = 'S'; 1086 if (flags & CLIENT_FQDN_FLAGS_O) 1087 buf[i++] = 'O'; 1088 if (flags & CLIENT_FQDN_FLAGS_E) 1089 buf[i++] = 'E'; 1090 if (flags & CLIENT_FQDN_FLAGS_N) 1091 buf[i++] = 'N'; 1092 buf[i] = '\0'; 1093 1094 return buf; 1095} 1096