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 36 static 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 58 struct 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 */ 240 241 struct 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 */ 263 264 static void rfc1048_print(netdissect_options *, const u_char *); 265 static void cmu_print(netdissect_options *, const u_char *); 266 static char *client_fqdn_flags(u_int flags); 267 268 static const struct tok bootp_flag_values[] = { 269 { 0x8000, "Broadcast" }, 270 { 0, NULL} 271 }; 272 273 static const struct tok bootp_op_values[] = { 274 { BOOTPREQUEST, "Request" }, 275 { BOOTPREPLY, "Reply" }, 276 { 0, NULL} 277 }; 278 279 /* 280 * Print bootp requests 281 */ 282 void 283 bootp_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)) { 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)) { 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_TCHECK(bp->bp_vend[0]); 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 ul = EXTRACT_32BITS(&bp->bp_vend); 392 if (ul != 0) 393 ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul)); 394 } 395 396 return; 397 trunc: 398 ND_PRINT((ndo, "%s", tstr)); 399 } 400 401 /* 402 * The first character specifies the format to print: 403 * i - ip address (32 bits) 404 * p - ip address pairs (32 bits + 32 bits) 405 * l - long (32 bits) 406 * L - unsigned long (32 bits) 407 * s - short (16 bits) 408 * b - period-seperated decimal bytes (variable length) 409 * x - colon-seperated hex bytes (variable length) 410 * a - ascii string (variable length) 411 * B - on/off (8 bits) 412 * $ - special (explicit code to handle) 413 */ 414 static const struct tok tag2str[] = { 415 /* RFC1048 tags */ 416 { TAG_PAD, " PAD" }, 417 { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */ 418 { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */ 419 { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */ 420 { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */ 421 { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */ 422 { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */ 423 { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */ 424 { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */ 425 { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */ 426 { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */ 427 { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */ 428 { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */ 429 { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */ 430 { TAG_END, " END" }, 431 /* RFC1497 tags */ 432 { TAG_DUMPPATH, "aDP" }, 433 { TAG_DOMAINNAME, "aDomain-Name" }, 434 { TAG_SWAP_SERVER, "iSS" }, 435 { TAG_ROOTPATH, "aRP" }, 436 { TAG_EXTPATH, "aEP" }, 437 /* RFC2132 tags */ 438 { TAG_IP_FORWARD, "BIPF" }, 439 { TAG_NL_SRCRT, "BSRT" }, 440 { TAG_PFILTERS, "pPF" }, 441 { TAG_REASS_SIZE, "sRSZ" }, 442 { TAG_DEF_TTL, "bTTL" }, 443 { TAG_MTU_TIMEOUT, "lMTU-Timeout" }, 444 { TAG_MTU_TABLE, "sMTU-Table" }, 445 { TAG_INT_MTU, "sMTU" }, 446 { TAG_LOCAL_SUBNETS, "BLSN" }, 447 { TAG_BROAD_ADDR, "iBR" }, 448 { TAG_DO_MASK_DISC, "BMD" }, 449 { TAG_SUPPLY_MASK, "BMS" }, 450 { TAG_DO_RDISC, "BRouter-Discovery" }, 451 { TAG_RTR_SOL_ADDR, "iRSA" }, 452 { TAG_STATIC_ROUTE, "pStatic-Route" }, 453 { TAG_USE_TRAILERS, "BUT" }, 454 { TAG_ARP_TIMEOUT, "lAT" }, 455 { TAG_ETH_ENCAP, "BIE" }, 456 { TAG_TCP_TTL, "bTT" }, 457 { TAG_TCP_KEEPALIVE, "lKI" }, 458 { TAG_KEEPALIVE_GO, "BKG" }, 459 { TAG_NIS_DOMAIN, "aYD" }, 460 { TAG_NIS_SERVERS, "iYS" }, 461 { TAG_NTP_SERVERS, "iNTP" }, 462 { TAG_VENDOR_OPTS, "bVendor-Option" }, 463 { TAG_NETBIOS_NS, "iNetbios-Name-Server" }, 464 { TAG_NETBIOS_DDS, "iWDD" }, 465 { TAG_NETBIOS_NODE, "$Netbios-Node" }, 466 { TAG_NETBIOS_SCOPE, "aNetbios-Scope" }, 467 { TAG_XWIN_FS, "iXFS" }, 468 { TAG_XWIN_DM, "iXDM" }, 469 { TAG_NIS_P_DOMAIN, "sN+D" }, 470 { TAG_NIS_P_SERVERS, "iN+S" }, 471 { TAG_MOBILE_HOME, "iMH" }, 472 { TAG_SMPT_SERVER, "iSMTP" }, 473 { TAG_POP3_SERVER, "iPOP3" }, 474 { TAG_NNTP_SERVER, "iNNTP" }, 475 { TAG_WWW_SERVER, "iWWW" }, 476 { TAG_FINGER_SERVER, "iFG" }, 477 { TAG_IRC_SERVER, "iIRC" }, 478 { TAG_STREETTALK_SRVR, "iSTS" }, 479 { TAG_STREETTALK_STDA, "iSTDA" }, 480 { TAG_REQUESTED_IP, "iRequested-IP" }, 481 { TAG_IP_LEASE, "lLease-Time" }, 482 { TAG_OPT_OVERLOAD, "$OO" }, 483 { TAG_TFTP_SERVER, "aTFTP" }, 484 { TAG_BOOTFILENAME, "aBF" }, 485 { TAG_DHCP_MESSAGE, " DHCP-Message" }, 486 { TAG_SERVER_ID, "iServer-ID" }, 487 { TAG_PARM_REQUEST, "bParameter-Request" }, 488 { TAG_MESSAGE, "aMSG" }, 489 { TAG_MAX_MSG_SIZE, "sMSZ" }, 490 { TAG_RENEWAL_TIME, "lRN" }, 491 { TAG_REBIND_TIME, "lRB" }, 492 { TAG_VENDOR_CLASS, "aVendor-Class" }, 493 { TAG_CLIENT_ID, "$Client-ID" }, 494 /* RFC 2485 */ 495 { TAG_OPEN_GROUP_UAP, "aUAP" }, 496 /* RFC 2563 */ 497 { TAG_DISABLE_AUTOCONF, "BNOAUTO" }, 498 /* RFC 2610 */ 499 { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */ 500 { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */ 501 /* RFC 2937 */ 502 { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */ 503 /* RFC 3004 - The User Class Option for DHCP */ 504 { TAG_USER_CLASS, "$User-Class" }, 505 /* RFC 3011 */ 506 { TAG_IP4_SUBNET_SELECT, "iSUBNET" }, 507 /* RFC 3442 */ 508 { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" }, 509 { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" }, 510 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */ 511 { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" }, 512 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */ 513 { TAG_SLP_NAMING_AUTH, "aSLP-NA" }, 514 { TAG_CLIENT_FQDN, "$FQDN" }, 515 { TAG_AGENT_CIRCUIT, "$Agent-Information" }, 516 { TAG_AGENT_REMOTE, "bARMT" }, 517 { TAG_AGENT_MASK, "bAMSK" }, 518 { TAG_TZ_STRING, "aTZSTR" }, 519 { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */ 520 { TAG_AUTH, "bAUTH" }, /* XXX 'b' */ 521 { TAG_VINES_SERVERS, "iVINES" }, 522 { TAG_SERVER_RANK, "sRANK" }, 523 { TAG_CLIENT_ARCH, "sARCH" }, 524 { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */ 525 { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */ 526 { TAG_LDAP_URL, "aLDAP" }, 527 { TAG_6OVER4, "i6o4" }, 528 { TAG_TZ_PCODE, "aPOSIX-TZ" }, 529 { TAG_TZ_TCODE, "aTZ-Name" }, 530 { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */ 531 { TAG_NETINFO_PARENT, "iNI" }, 532 { TAG_NETINFO_PARENT_TAG, "aNITAG" }, 533 { TAG_URL, "aURL" }, 534 { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */ 535 { TAG_MUDURL, "aMUD-URL" }, 536 { 0, NULL } 537 }; 538 /* 2-byte extended tags */ 539 static const struct tok xtag2str[] = { 540 { 0, NULL } 541 }; 542 543 /* DHCP "options overload" types */ 544 static const struct tok oo2str[] = { 545 { 1, "file" }, 546 { 2, "sname" }, 547 { 3, "file+sname" }, 548 { 0, NULL } 549 }; 550 551 /* NETBIOS over TCP/IP node type options */ 552 static const struct tok nbo2str[] = { 553 { 0x1, "b-node" }, 554 { 0x2, "p-node" }, 555 { 0x4, "m-node" }, 556 { 0x8, "h-node" }, 557 { 0, NULL } 558 }; 559 560 /* ARP Hardware types, for Client-ID option */ 561 static const struct tok arp2str[] = { 562 { 0x1, "ether" }, 563 { 0x6, "ieee802" }, 564 { 0x7, "arcnet" }, 565 { 0xf, "frelay" }, 566 { 0x17, "strip" }, 567 { 0x18, "ieee1394" }, 568 { 0, NULL } 569 }; 570 571 static const struct tok dhcp_msg_values[] = { 572 { DHCPDISCOVER, "Discover" }, 573 { DHCPOFFER, "Offer" }, 574 { DHCPREQUEST, "Request" }, 575 { DHCPDECLINE, "Decline" }, 576 { DHCPACK, "ACK" }, 577 { DHCPNAK, "NACK" }, 578 { DHCPRELEASE, "Release" }, 579 { DHCPINFORM, "Inform" }, 580 { 0, NULL } 581 }; 582 583 #define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */ 584 #define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */ 585 #define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */ 586 static const struct tok agent_suboption_values[] = { 587 { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" }, 588 { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" }, 589 { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" }, 590 { 0, NULL } 591 }; 592 593 594 static void 595 rfc1048_print(netdissect_options *ndo, 596 register const u_char *bp) 597 { 598 register uint16_t tag; 599 register u_int len; 600 register const char *cp; 601 register char c; 602 int first, idx; 603 uint32_t ul; 604 uint16_t us; 605 uint8_t uc, subopt, suboptlen; 606 607 ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions")); 608 609 /* Step over magic cookie */ 610 ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp))); 611 bp += sizeof(int32_t); 612 613 /* Loop while we there is a tag left in the buffer */ 614 while (ND_TTEST2(*bp, 1)) { 615 tag = *bp++; 616 if (tag == TAG_PAD && ndo->ndo_vflag < 3) 617 continue; 618 if (tag == TAG_END && ndo->ndo_vflag < 3) 619 return; 620 if (tag == TAG_EXTENDED_OPTION) { 621 ND_TCHECK2(*(bp + 1), 2); 622 tag = EXTRACT_16BITS(bp + 1); 623 /* XXX we don't know yet if the IANA will 624 * preclude overlap of 1-byte and 2-byte spaces. 625 * If not, we need to offset tag after this step. 626 */ 627 cp = tok2str(xtag2str, "?xT%u", tag); 628 } else 629 cp = tok2str(tag2str, "?T%u", tag); 630 c = *cp++; 631 632 if (tag == TAG_PAD || tag == TAG_END) 633 len = 0; 634 else { 635 /* Get the length; check for truncation */ 636 ND_TCHECK2(*bp, 1); 637 len = *bp++; 638 } 639 640 ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len, 641 len > 0 ? ": " : "")); 642 643 if (tag == TAG_PAD && ndo->ndo_vflag > 2) { 644 u_int ntag = 1; 645 while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) { 646 bp++; 647 ntag++; 648 } 649 if (ntag > 1) 650 ND_PRINT((ndo, ", occurs %u", ntag)); 651 } 652 653 if (!ND_TTEST2(*bp, len)) { 654 ND_PRINT((ndo, "[|rfc1048 %u]", len)); 655 return; 656 } 657 658 if (tag == TAG_DHCP_MESSAGE && len == 1) { 659 uc = *bp++; 660 ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc))); 661 continue; 662 } 663 664 if (tag == TAG_PARM_REQUEST) { 665 idx = 0; 666 while (len-- > 0) { 667 uc = *bp++; 668 cp = tok2str(tag2str, "?Option %u", uc); 669 if (idx % 4 == 0) 670 ND_PRINT((ndo, "\n\t ")); 671 else 672 ND_PRINT((ndo, ", ")); 673 ND_PRINT((ndo, "%s", cp + 1)); 674 idx++; 675 } 676 continue; 677 } 678 679 if (tag == TAG_EXTENDED_REQUEST) { 680 first = 1; 681 while (len > 1) { 682 len -= 2; 683 us = EXTRACT_16BITS(bp); 684 bp += 2; 685 cp = tok2str(xtag2str, "?xT%u", us); 686 if (!first) 687 ND_PRINT((ndo, "+")); 688 ND_PRINT((ndo, "%s", cp + 1)); 689 first = 0; 690 } 691 continue; 692 } 693 694 /* Print data */ 695 if (c == '?') { 696 /* Base default formats for unknown tags on data size */ 697 if (len & 1) 698 c = 'b'; 699 else if (len & 2) 700 c = 's'; 701 else 702 c = 'l'; 703 } 704 first = 1; 705 switch (c) { 706 707 case 'a': 708 /* ascii strings */ 709 ND_PRINT((ndo, "\"")); 710 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 711 ND_PRINT((ndo, "\"")); 712 goto trunc; 713 } 714 ND_PRINT((ndo, "\"")); 715 bp += len; 716 len = 0; 717 break; 718 719 case 'i': 720 case 'l': 721 case 'L': 722 /* ip addresses/32-bit words */ 723 while (len >= sizeof(ul)) { 724 if (!first) 725 ND_PRINT((ndo, ",")); 726 ul = EXTRACT_32BITS(bp); 727 if (c == 'i') { 728 ul = htonl(ul); 729 ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul))); 730 } else if (c == 'L') 731 ND_PRINT((ndo, "%d", ul)); 732 else 733 ND_PRINT((ndo, "%u", ul)); 734 bp += sizeof(ul); 735 len -= sizeof(ul); 736 first = 0; 737 } 738 break; 739 740 case 'p': 741 /* IP address pairs */ 742 while (len >= 2*sizeof(ul)) { 743 if (!first) 744 ND_PRINT((ndo, ",")); 745 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 746 ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul))); 747 bp += sizeof(ul); 748 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 749 ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul))); 750 bp += sizeof(ul); 751 len -= 2*sizeof(ul); 752 first = 0; 753 } 754 break; 755 756 case 's': 757 /* shorts */ 758 while (len >= sizeof(us)) { 759 if (!first) 760 ND_PRINT((ndo, ",")); 761 us = EXTRACT_16BITS(bp); 762 ND_PRINT((ndo, "%u", us)); 763 bp += sizeof(us); 764 len -= sizeof(us); 765 first = 0; 766 } 767 break; 768 769 case 'B': 770 /* boolean */ 771 while (len > 0) { 772 if (!first) 773 ND_PRINT((ndo, ",")); 774 switch (*bp) { 775 case 0: 776 ND_PRINT((ndo, "N")); 777 break; 778 case 1: 779 ND_PRINT((ndo, "Y")); 780 break; 781 default: 782 ND_PRINT((ndo, "%u?", *bp)); 783 break; 784 } 785 ++bp; 786 --len; 787 first = 0; 788 } 789 break; 790 791 case 'b': 792 case 'x': 793 default: 794 /* Bytes */ 795 while (len > 0) { 796 if (!first) 797 ND_PRINT((ndo, c == 'x' ? ":" : ".")); 798 if (c == 'x') 799 ND_PRINT((ndo, "%02x", *bp)); 800 else 801 ND_PRINT((ndo, "%u", *bp)); 802 ++bp; 803 --len; 804 first = 0; 805 } 806 break; 807 808 case '$': 809 /* Guys we can't handle with one of the usual cases */ 810 switch (tag) { 811 812 case TAG_NETBIOS_NODE: 813 /* this option should be at least 1 byte long */ 814 if (len < 1) { 815 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 816 break; 817 } 818 tag = *bp++; 819 --len; 820 ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag))); 821 break; 822 823 case TAG_OPT_OVERLOAD: 824 /* this option should be at least 1 byte long */ 825 if (len < 1) { 826 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 827 break; 828 } 829 tag = *bp++; 830 --len; 831 ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag))); 832 break; 833 834 case TAG_CLIENT_FQDN: 835 /* this option should be at least 3 bytes long */ 836 if (len < 3) { 837 ND_PRINT((ndo, "ERROR: length < 3 bytes")); 838 bp += len; 839 len = 0; 840 break; 841 } 842 if (*bp) 843 ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp))); 844 bp++; 845 if (*bp || *(bp+1)) 846 ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1))); 847 bp += 2; 848 ND_PRINT((ndo, "\"")); 849 if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) { 850 ND_PRINT((ndo, "\"")); 851 goto trunc; 852 } 853 ND_PRINT((ndo, "\"")); 854 bp += len - 3; 855 len = 0; 856 break; 857 858 case TAG_CLIENT_ID: 859 { 860 int type; 861 862 /* this option should be at least 1 byte long */ 863 if (len < 1) { 864 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 865 break; 866 } 867 type = *bp++; 868 len--; 869 if (type == 0) { 870 ND_PRINT((ndo, "\"")); 871 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 872 ND_PRINT((ndo, "\"")); 873 goto trunc; 874 } 875 ND_PRINT((ndo, "\"")); 876 bp += len; 877 len = 0; 878 break; 879 } else { 880 ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type))); 881 while (len > 0) { 882 if (!first) 883 ND_PRINT((ndo, ":")); 884 ND_PRINT((ndo, "%02x", *bp)); 885 ++bp; 886 --len; 887 first = 0; 888 } 889 } 890 break; 891 } 892 893 case TAG_AGENT_CIRCUIT: 894 while (len >= 2) { 895 subopt = *bp++; 896 suboptlen = *bp++; 897 len -= 2; 898 if (suboptlen > len) { 899 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option", 900 tok2str(agent_suboption_values, "Unknown", subopt), 901 subopt, 902 suboptlen)); 903 bp += len; 904 len = 0; 905 break; 906 } 907 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ", 908 tok2str(agent_suboption_values, "Unknown", subopt), 909 subopt, 910 suboptlen)); 911 switch (subopt) { 912 913 case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */ 914 case AGENT_SUBOPTION_REMOTE_ID: 915 case AGENT_SUBOPTION_SUBSCRIBER_ID: 916 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) 917 goto trunc; 918 break; 919 920 default: 921 print_unknown_data(ndo, bp, "\n\t\t", suboptlen); 922 } 923 924 len -= suboptlen; 925 bp += suboptlen; 926 } 927 break; 928 929 case TAG_CLASSLESS_STATIC_RT: 930 case TAG_CLASSLESS_STA_RT_MS: 931 { 932 u_int mask_width, significant_octets, i; 933 934 /* this option should be at least 5 bytes long */ 935 if (len < 5) { 936 ND_PRINT((ndo, "ERROR: length < 5 bytes")); 937 bp += len; 938 len = 0; 939 break; 940 } 941 while (len > 0) { 942 if (!first) 943 ND_PRINT((ndo, ",")); 944 mask_width = *bp++; 945 len--; 946 /* mask_width <= 32 */ 947 if (mask_width > 32) { 948 ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width)); 949 bp += len; 950 len = 0; 951 break; 952 } 953 significant_octets = (mask_width + 7) / 8; 954 /* significant octets + router(4) */ 955 if (len < significant_octets + 4) { 956 ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4)); 957 bp += len; 958 len = 0; 959 break; 960 } 961 ND_PRINT((ndo, "(")); 962 if (mask_width == 0) 963 ND_PRINT((ndo, "default")); 964 else { 965 for (i = 0; i < significant_octets ; i++) { 966 if (i > 0) 967 ND_PRINT((ndo, ".")); 968 ND_PRINT((ndo, "%d", *bp++)); 969 } 970 for (i = significant_octets ; i < 4 ; i++) 971 ND_PRINT((ndo, ".0")); 972 ND_PRINT((ndo, "/%d", mask_width)); 973 } 974 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 975 ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul))); 976 bp += sizeof(ul); 977 len -= (significant_octets + 4); 978 first = 0; 979 } 980 break; 981 } 982 983 case TAG_USER_CLASS: 984 { 985 u_int suboptnumber = 1; 986 987 first = 1; 988 if (len < 2) { 989 ND_PRINT((ndo, "ERROR: length < 2 bytes")); 990 bp += len; 991 len = 0; 992 break; 993 } 994 while (len > 0) { 995 suboptlen = *bp++; 996 len--; 997 ND_PRINT((ndo, "\n\t ")); 998 ND_PRINT((ndo, "instance#%u: ", suboptnumber)); 999 if (suboptlen == 0) { 1000 ND_PRINT((ndo, "ERROR: suboption length must be non-zero")); 1001 bp += len; 1002 len = 0; 1003 break; 1004 } 1005 if (len < suboptlen) { 1006 ND_PRINT((ndo, "ERROR: invalid option")); 1007 bp += len; 1008 len = 0; 1009 break; 1010 } 1011 ND_PRINT((ndo, "\"")); 1012 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) { 1013 ND_PRINT((ndo, "\"")); 1014 goto trunc; 1015 } 1016 ND_PRINT((ndo, "\"")); 1017 ND_PRINT((ndo, ", length %d", suboptlen)); 1018 suboptnumber++; 1019 len -= suboptlen; 1020 bp += suboptlen; 1021 } 1022 break; 1023 } 1024 1025 default: 1026 ND_PRINT((ndo, "[unknown special tag %u, size %u]", 1027 tag, len)); 1028 bp += len; 1029 len = 0; 1030 break; 1031 } 1032 break; 1033 } 1034 /* Data left over? */ 1035 if (len) { 1036 ND_PRINT((ndo, "\n\t trailing data length %u", len)); 1037 bp += len; 1038 } 1039 } 1040 return; 1041 trunc: 1042 ND_PRINT((ndo, "|[rfc1048]")); 1043 } 1044 1045 static void 1046 cmu_print(netdissect_options *ndo, 1047 register const u_char *bp) 1048 { 1049 register const struct cmu_vend *cmu; 1050 1051 #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \ 1052 if (cmu->m.s_addr != 0) \ 1053 ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); } 1054 1055 ND_PRINT((ndo, " vend-cmu")); 1056 cmu = (const struct cmu_vend *)bp; 1057 1058 /* Only print if there are unknown bits */ 1059 ND_TCHECK(cmu->v_flags); 1060 if ((cmu->v_flags & ~(VF_SMASK)) != 0) 1061 ND_PRINT((ndo, " F:0x%x", cmu->v_flags)); 1062 PRINTCMUADDR(v_dgate, "DG"); 1063 PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*"); 1064 PRINTCMUADDR(v_dns1, "NS1"); 1065 PRINTCMUADDR(v_dns2, "NS2"); 1066 PRINTCMUADDR(v_ins1, "IEN1"); 1067 PRINTCMUADDR(v_ins2, "IEN2"); 1068 PRINTCMUADDR(v_ts1, "TS1"); 1069 PRINTCMUADDR(v_ts2, "TS2"); 1070 return; 1071 1072 trunc: 1073 ND_PRINT((ndo, "%s", tstr)); 1074 #undef PRINTCMUADDR 1075 } 1076 1077 static char * 1078 client_fqdn_flags(u_int flags) 1079 { 1080 static char buf[8+1]; 1081 int i = 0; 1082 1083 if (flags & CLIENT_FQDN_FLAGS_S) 1084 buf[i++] = 'S'; 1085 if (flags & CLIENT_FQDN_FLAGS_O) 1086 buf[i++] = 'O'; 1087 if (flags & CLIENT_FQDN_FLAGS_E) 1088 buf[i++] = 'E'; 1089 if (flags & CLIENT_FQDN_FLAGS_N) 1090 buf[i++] = 'N'; 1091 buf[i] = '\0'; 1092 1093 return buf; 1094 } 1095