print-bootp.c revision 1.1.1.6
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 * Format and print bootp packets. 22 */ 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 #define TAG_PRINTER_NAME ((uint8_t) 100) 216 #define TAG_MDHCP_SERVER ((uint8_t) 101) 217 #define TAG_IPX_COMPAT ((uint8_t) 110) 218 #define TAG_NETINFO_PARENT ((uint8_t) 112) 219 #define TAG_NETINFO_PARENT_TAG ((uint8_t) 113) 220 #define TAG_URL ((uint8_t) 114) 221 #define TAG_FAILOVER ((uint8_t) 115) 222 #define TAG_EXTENDED_REQUEST ((uint8_t) 126) 223 #define TAG_EXTENDED_OPTION ((uint8_t) 127) 224 225 /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */ 226 #define DHCPDISCOVER 1 227 #define DHCPOFFER 2 228 #define DHCPREQUEST 3 229 #define DHCPDECLINE 4 230 #define DHCPACK 5 231 #define DHCPNAK 6 232 #define DHCPRELEASE 7 233 #define DHCPINFORM 8 234 235 /* 236 * "vendor" data permitted for CMU bootp clients. 237 */ 238 239 struct cmu_vend { 240 uint8_t v_magic[4]; /* magic number */ 241 uint32_t v_flags; /* flags/opcodes, etc. */ 242 struct in_addr v_smask; /* Subnet mask */ 243 struct in_addr v_dgate; /* Default gateway */ 244 struct in_addr v_dns1, v_dns2; /* Domain name servers */ 245 struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */ 246 struct in_addr v_ts1, v_ts2; /* Time servers */ 247 uint8_t v_unused[24]; /* currently unused */ 248 } UNALIGNED; 249 250 251 /* v_flags values */ 252 #define VF_SMASK 1 /* Subnet mask field contains valid data */ 253 254 /* RFC 4702 DHCP Client FQDN Option */ 255 256 #define CLIENT_FQDN_FLAGS_S 0x01 257 #define CLIENT_FQDN_FLAGS_O 0x02 258 #define CLIENT_FQDN_FLAGS_E 0x04 259 #define CLIENT_FQDN_FLAGS_N 0x08 260 /* end of original bootp.h */ 261 262 static void rfc1048_print(netdissect_options *, const u_char *); 263 static void cmu_print(netdissect_options *, const u_char *); 264 static char *client_fqdn_flags(u_int flags); 265 266 static const struct tok bootp_flag_values[] = { 267 { 0x8000, "Broadcast" }, 268 { 0, NULL} 269 }; 270 271 static const struct tok bootp_op_values[] = { 272 { BOOTPREQUEST, "Request" }, 273 { BOOTPREPLY, "Reply" }, 274 { 0, NULL} 275 }; 276 277 /* 278 * Print bootp requests 279 */ 280 void 281 bootp_print(netdissect_options *ndo, 282 register const u_char *cp, u_int length) 283 { 284 register const struct bootp *bp; 285 static const u_char vm_cmu[4] = VM_CMU; 286 static const u_char vm_rfc1048[4] = VM_RFC1048; 287 288 bp = (const struct bootp *)cp; 289 ND_TCHECK(bp->bp_op); 290 291 ND_PRINT((ndo, "BOOTP/DHCP, %s", 292 tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op))); 293 294 if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) { 295 ND_TCHECK2(bp->bp_chaddr[0], 6); 296 ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr))); 297 } 298 299 ND_PRINT((ndo, ", length %u", length)); 300 301 if (!ndo->ndo_vflag) 302 return; 303 304 ND_TCHECK(bp->bp_secs); 305 306 /* The usual hardware address type is 1 (10Mb Ethernet) */ 307 if (bp->bp_htype != 1) 308 ND_PRINT((ndo, ", htype %d", bp->bp_htype)); 309 310 /* The usual length for 10Mb Ethernet address is 6 bytes */ 311 if (bp->bp_htype != 1 || bp->bp_hlen != 6) 312 ND_PRINT((ndo, ", hlen %d", bp->bp_hlen)); 313 314 /* Only print interesting fields */ 315 if (bp->bp_hops) 316 ND_PRINT((ndo, ", hops %d", bp->bp_hops)); 317 if (EXTRACT_32BITS(&bp->bp_xid)) 318 ND_PRINT((ndo, ", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid))); 319 if (EXTRACT_16BITS(&bp->bp_secs)) 320 ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs))); 321 322 ND_PRINT((ndo, ", Flags [%s]", 323 bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)))); 324 if (ndo->ndo_vflag > 1) 325 ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags))); 326 327 /* Client's ip address */ 328 ND_TCHECK(bp->bp_ciaddr); 329 if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr)) 330 ND_PRINT((ndo, "\n\t Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr))); 331 332 /* 'your' ip address (bootp client) */ 333 ND_TCHECK(bp->bp_yiaddr); 334 if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr)) 335 ND_PRINT((ndo, "\n\t Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr))); 336 337 /* Server's ip address */ 338 ND_TCHECK(bp->bp_siaddr); 339 if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr)) 340 ND_PRINT((ndo, "\n\t Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr))); 341 342 /* Gateway's ip address */ 343 ND_TCHECK(bp->bp_giaddr); 344 if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr)) 345 ND_PRINT((ndo, "\n\t Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr))); 346 347 /* Client's Ethernet address */ 348 if (bp->bp_htype == 1 && bp->bp_hlen == 6) { 349 ND_TCHECK2(bp->bp_chaddr[0], 6); 350 ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr))); 351 } 352 353 ND_TCHECK2(bp->bp_sname[0], 1); /* check first char only */ 354 if (*bp->bp_sname) { 355 ND_PRINT((ndo, "\n\t sname \"")); 356 if (fn_print(ndo, bp->bp_sname, ndo->ndo_snapend)) { 357 ND_PRINT((ndo, "\"")); 358 ND_PRINT((ndo, "%s", tstr + 1)); 359 return; 360 } 361 ND_PRINT((ndo, "\"")); 362 } 363 ND_TCHECK2(bp->bp_file[0], 1); /* check first char only */ 364 if (*bp->bp_file) { 365 ND_PRINT((ndo, "\n\t file \"")); 366 if (fn_print(ndo, bp->bp_file, ndo->ndo_snapend)) { 367 ND_PRINT((ndo, "\"")); 368 ND_PRINT((ndo, "%s", tstr + 1)); 369 return; 370 } 371 ND_PRINT((ndo, "\"")); 372 } 373 374 /* Decode the vendor buffer */ 375 ND_TCHECK(bp->bp_vend[0]); 376 if (memcmp((const char *)bp->bp_vend, vm_rfc1048, 377 sizeof(uint32_t)) == 0) 378 rfc1048_print(ndo, bp->bp_vend); 379 else if (memcmp((const char *)bp->bp_vend, vm_cmu, 380 sizeof(uint32_t)) == 0) 381 cmu_print(ndo, bp->bp_vend); 382 else { 383 uint32_t ul; 384 385 ul = EXTRACT_32BITS(&bp->bp_vend); 386 if (ul != 0) 387 ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul)); 388 } 389 390 return; 391 trunc: 392 ND_PRINT((ndo, "%s", tstr)); 393 } 394 395 /* 396 * The first character specifies the format to print: 397 * i - ip address (32 bits) 398 * p - ip address pairs (32 bits + 32 bits) 399 * l - long (32 bits) 400 * L - unsigned long (32 bits) 401 * s - short (16 bits) 402 * b - period-seperated decimal bytes (variable length) 403 * x - colon-seperated hex bytes (variable length) 404 * a - ascii string (variable length) 405 * B - on/off (8 bits) 406 * $ - special (explicit code to handle) 407 */ 408 static const struct tok tag2str[] = { 409 /* RFC1048 tags */ 410 { TAG_PAD, " PAD" }, 411 { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */ 412 { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */ 413 { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */ 414 { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */ 415 { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */ 416 { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */ 417 { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */ 418 { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */ 419 { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */ 420 { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */ 421 { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */ 422 { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */ 423 { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */ 424 { TAG_END, " END" }, 425 /* RFC1497 tags */ 426 { TAG_DUMPPATH, "aDP" }, 427 { TAG_DOMAINNAME, "aDomain-Name" }, 428 { TAG_SWAP_SERVER, "iSS" }, 429 { TAG_ROOTPATH, "aRP" }, 430 { TAG_EXTPATH, "aEP" }, 431 /* RFC2132 tags */ 432 { TAG_IP_FORWARD, "BIPF" }, 433 { TAG_NL_SRCRT, "BSRT" }, 434 { TAG_PFILTERS, "pPF" }, 435 { TAG_REASS_SIZE, "sRSZ" }, 436 { TAG_DEF_TTL, "bTTL" }, 437 { TAG_MTU_TIMEOUT, "lMTU-Timeout" }, 438 { TAG_MTU_TABLE, "sMTU-Table" }, 439 { TAG_INT_MTU, "sMTU" }, 440 { TAG_LOCAL_SUBNETS, "BLSN" }, 441 { TAG_BROAD_ADDR, "iBR" }, 442 { TAG_DO_MASK_DISC, "BMD" }, 443 { TAG_SUPPLY_MASK, "BMS" }, 444 { TAG_DO_RDISC, "BRouter-Discovery" }, 445 { TAG_RTR_SOL_ADDR, "iRSA" }, 446 { TAG_STATIC_ROUTE, "pStatic-Route" }, 447 { TAG_USE_TRAILERS, "BUT" }, 448 { TAG_ARP_TIMEOUT, "lAT" }, 449 { TAG_ETH_ENCAP, "BIE" }, 450 { TAG_TCP_TTL, "bTT" }, 451 { TAG_TCP_KEEPALIVE, "lKI" }, 452 { TAG_KEEPALIVE_GO, "BKG" }, 453 { TAG_NIS_DOMAIN, "aYD" }, 454 { TAG_NIS_SERVERS, "iYS" }, 455 { TAG_NTP_SERVERS, "iNTP" }, 456 { TAG_VENDOR_OPTS, "bVendor-Option" }, 457 { TAG_NETBIOS_NS, "iNetbios-Name-Server" }, 458 { TAG_NETBIOS_DDS, "iWDD" }, 459 { TAG_NETBIOS_NODE, "$Netbios-Node" }, 460 { TAG_NETBIOS_SCOPE, "aNetbios-Scope" }, 461 { TAG_XWIN_FS, "iXFS" }, 462 { TAG_XWIN_DM, "iXDM" }, 463 { TAG_NIS_P_DOMAIN, "sN+D" }, 464 { TAG_NIS_P_SERVERS, "iN+S" }, 465 { TAG_MOBILE_HOME, "iMH" }, 466 { TAG_SMPT_SERVER, "iSMTP" }, 467 { TAG_POP3_SERVER, "iPOP3" }, 468 { TAG_NNTP_SERVER, "iNNTP" }, 469 { TAG_WWW_SERVER, "iWWW" }, 470 { TAG_FINGER_SERVER, "iFG" }, 471 { TAG_IRC_SERVER, "iIRC" }, 472 { TAG_STREETTALK_SRVR, "iSTS" }, 473 { TAG_STREETTALK_STDA, "iSTDA" }, 474 { TAG_REQUESTED_IP, "iRequested-IP" }, 475 { TAG_IP_LEASE, "lLease-Time" }, 476 { TAG_OPT_OVERLOAD, "$OO" }, 477 { TAG_TFTP_SERVER, "aTFTP" }, 478 { TAG_BOOTFILENAME, "aBF" }, 479 { TAG_DHCP_MESSAGE, " DHCP-Message" }, 480 { TAG_SERVER_ID, "iServer-ID" }, 481 { TAG_PARM_REQUEST, "bParameter-Request" }, 482 { TAG_MESSAGE, "aMSG" }, 483 { TAG_MAX_MSG_SIZE, "sMSZ" }, 484 { TAG_RENEWAL_TIME, "lRN" }, 485 { TAG_REBIND_TIME, "lRB" }, 486 { TAG_VENDOR_CLASS, "aVendor-Class" }, 487 { TAG_CLIENT_ID, "$Client-ID" }, 488 /* RFC 2485 */ 489 { TAG_OPEN_GROUP_UAP, "aUAP" }, 490 /* RFC 2563 */ 491 { TAG_DISABLE_AUTOCONF, "BNOAUTO" }, 492 /* RFC 2610 */ 493 { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */ 494 { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */ 495 /* RFC 2937 */ 496 { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */ 497 /* RFC 3004 - The User Class Option for DHCP */ 498 { TAG_USER_CLASS, "$User-Class" }, 499 /* RFC 3011 */ 500 { TAG_IP4_SUBNET_SELECT, "iSUBNET" }, 501 /* RFC 3442 */ 502 { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" }, 503 { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" }, 504 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */ 505 { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" }, 506 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */ 507 { TAG_SLP_NAMING_AUTH, "aSLP-NA" }, 508 { TAG_CLIENT_FQDN, "$FQDN" }, 509 { TAG_AGENT_CIRCUIT, "$Agent-Information" }, 510 { TAG_AGENT_REMOTE, "bARMT" }, 511 { TAG_AGENT_MASK, "bAMSK" }, 512 { TAG_TZ_STRING, "aTZSTR" }, 513 { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */ 514 { TAG_AUTH, "bAUTH" }, /* XXX 'b' */ 515 { TAG_VINES_SERVERS, "iVINES" }, 516 { TAG_SERVER_RANK, "sRANK" }, 517 { TAG_CLIENT_ARCH, "sARCH" }, 518 { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */ 519 { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */ 520 { TAG_LDAP_URL, "aLDAP" }, 521 { TAG_6OVER4, "i6o4" }, 522 { TAG_PRINTER_NAME, "aPRTR" }, 523 { TAG_MDHCP_SERVER, "bMDHCP" }, /* XXX 'b' */ 524 { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */ 525 { TAG_NETINFO_PARENT, "iNI" }, 526 { TAG_NETINFO_PARENT_TAG, "aNITAG" }, 527 { TAG_URL, "aURL" }, 528 { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */ 529 { 0, NULL } 530 }; 531 /* 2-byte extended tags */ 532 static const struct tok xtag2str[] = { 533 { 0, NULL } 534 }; 535 536 /* DHCP "options overload" types */ 537 static const struct tok oo2str[] = { 538 { 1, "file" }, 539 { 2, "sname" }, 540 { 3, "file+sname" }, 541 { 0, NULL } 542 }; 543 544 /* NETBIOS over TCP/IP node type options */ 545 static const struct tok nbo2str[] = { 546 { 0x1, "b-node" }, 547 { 0x2, "p-node" }, 548 { 0x4, "m-node" }, 549 { 0x8, "h-node" }, 550 { 0, NULL } 551 }; 552 553 /* ARP Hardware types, for Client-ID option */ 554 static const struct tok arp2str[] = { 555 { 0x1, "ether" }, 556 { 0x6, "ieee802" }, 557 { 0x7, "arcnet" }, 558 { 0xf, "frelay" }, 559 { 0x17, "strip" }, 560 { 0x18, "ieee1394" }, 561 { 0, NULL } 562 }; 563 564 static const struct tok dhcp_msg_values[] = { 565 { DHCPDISCOVER, "Discover" }, 566 { DHCPOFFER, "Offer" }, 567 { DHCPREQUEST, "Request" }, 568 { DHCPDECLINE, "Decline" }, 569 { DHCPACK, "ACK" }, 570 { DHCPNAK, "NACK" }, 571 { DHCPRELEASE, "Release" }, 572 { DHCPINFORM, "Inform" }, 573 { 0, NULL } 574 }; 575 576 #define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */ 577 #define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */ 578 #define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */ 579 static const struct tok agent_suboption_values[] = { 580 { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" }, 581 { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" }, 582 { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" }, 583 { 0, NULL } 584 }; 585 586 587 static void 588 rfc1048_print(netdissect_options *ndo, 589 register const u_char *bp) 590 { 591 register uint16_t tag; 592 register u_int len; 593 register const char *cp; 594 register char c; 595 int first, idx; 596 uint32_t ul; 597 uint16_t us; 598 uint8_t uc, subopt, suboptlen; 599 600 ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions")); 601 602 /* Step over magic cookie */ 603 ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp))); 604 bp += sizeof(int32_t); 605 606 /* Loop while we there is a tag left in the buffer */ 607 while (ND_TTEST2(*bp, 1)) { 608 tag = *bp++; 609 if (tag == TAG_PAD && ndo->ndo_vflag < 3) 610 continue; 611 if (tag == TAG_END && ndo->ndo_vflag < 3) 612 return; 613 if (tag == TAG_EXTENDED_OPTION) { 614 ND_TCHECK2(*(bp + 1), 2); 615 tag = EXTRACT_16BITS(bp + 1); 616 /* XXX we don't know yet if the IANA will 617 * preclude overlap of 1-byte and 2-byte spaces. 618 * If not, we need to offset tag after this step. 619 */ 620 cp = tok2str(xtag2str, "?xT%u", tag); 621 } else 622 cp = tok2str(tag2str, "?T%u", tag); 623 c = *cp++; 624 625 if (tag == TAG_PAD || tag == TAG_END) 626 len = 0; 627 else { 628 /* Get the length; check for truncation */ 629 ND_TCHECK2(*bp, 1); 630 len = *bp++; 631 } 632 633 ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len, 634 len > 0 ? ": " : "")); 635 636 if (tag == TAG_PAD && ndo->ndo_vflag > 2) { 637 u_int ntag = 1; 638 while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) { 639 bp++; 640 ntag++; 641 } 642 if (ntag > 1) 643 ND_PRINT((ndo, ", occurs %u", ntag)); 644 } 645 646 if (!ND_TTEST2(*bp, len)) { 647 ND_PRINT((ndo, "[|rfc1048 %u]", len)); 648 return; 649 } 650 651 if (tag == TAG_DHCP_MESSAGE && len == 1) { 652 uc = *bp++; 653 ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc))); 654 continue; 655 } 656 657 if (tag == TAG_PARM_REQUEST) { 658 idx = 0; 659 while (len-- > 0) { 660 uc = *bp++; 661 cp = tok2str(tag2str, "?Option %u", uc); 662 if (idx % 4 == 0) 663 ND_PRINT((ndo, "\n\t ")); 664 else 665 ND_PRINT((ndo, ", ")); 666 ND_PRINT((ndo, "%s", cp + 1)); 667 idx++; 668 } 669 continue; 670 } 671 672 if (tag == TAG_EXTENDED_REQUEST) { 673 first = 1; 674 while (len > 1) { 675 len -= 2; 676 us = EXTRACT_16BITS(bp); 677 bp += 2; 678 cp = tok2str(xtag2str, "?xT%u", us); 679 if (!first) 680 ND_PRINT((ndo, "+")); 681 ND_PRINT((ndo, "%s", cp + 1)); 682 first = 0; 683 } 684 continue; 685 } 686 687 /* Print data */ 688 if (c == '?') { 689 /* Base default formats for unknown tags on data size */ 690 if (len & 1) 691 c = 'b'; 692 else if (len & 2) 693 c = 's'; 694 else 695 c = 'l'; 696 } 697 first = 1; 698 switch (c) { 699 700 case 'a': 701 /* ascii strings */ 702 ND_PRINT((ndo, "\"")); 703 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 704 ND_PRINT((ndo, "\"")); 705 goto trunc; 706 } 707 ND_PRINT((ndo, "\"")); 708 bp += len; 709 len = 0; 710 break; 711 712 case 'i': 713 case 'l': 714 case 'L': 715 /* ip addresses/32-bit words */ 716 while (len >= sizeof(ul)) { 717 if (!first) 718 ND_PRINT((ndo, ",")); 719 ul = EXTRACT_32BITS(bp); 720 if (c == 'i') { 721 ul = htonl(ul); 722 ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul))); 723 } else if (c == 'L') 724 ND_PRINT((ndo, "%d", ul)); 725 else 726 ND_PRINT((ndo, "%u", ul)); 727 bp += sizeof(ul); 728 len -= sizeof(ul); 729 first = 0; 730 } 731 break; 732 733 case 'p': 734 /* IP address pairs */ 735 while (len >= 2*sizeof(ul)) { 736 if (!first) 737 ND_PRINT((ndo, ",")); 738 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 739 ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul))); 740 bp += sizeof(ul); 741 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 742 ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul))); 743 bp += sizeof(ul); 744 len -= 2*sizeof(ul); 745 first = 0; 746 } 747 break; 748 749 case 's': 750 /* shorts */ 751 while (len >= sizeof(us)) { 752 if (!first) 753 ND_PRINT((ndo, ",")); 754 us = EXTRACT_16BITS(bp); 755 ND_PRINT((ndo, "%u", us)); 756 bp += sizeof(us); 757 len -= sizeof(us); 758 first = 0; 759 } 760 break; 761 762 case 'B': 763 /* boolean */ 764 while (len > 0) { 765 if (!first) 766 ND_PRINT((ndo, ",")); 767 switch (*bp) { 768 case 0: 769 ND_PRINT((ndo, "N")); 770 break; 771 case 1: 772 ND_PRINT((ndo, "Y")); 773 break; 774 default: 775 ND_PRINT((ndo, "%u?", *bp)); 776 break; 777 } 778 ++bp; 779 --len; 780 first = 0; 781 } 782 break; 783 784 case 'b': 785 case 'x': 786 default: 787 /* Bytes */ 788 while (len > 0) { 789 if (!first) 790 ND_PRINT((ndo, c == 'x' ? ":" : ".")); 791 if (c == 'x') 792 ND_PRINT((ndo, "%02x", *bp)); 793 else 794 ND_PRINT((ndo, "%u", *bp)); 795 ++bp; 796 --len; 797 first = 0; 798 } 799 break; 800 801 case '$': 802 /* Guys we can't handle with one of the usual cases */ 803 switch (tag) { 804 805 case TAG_NETBIOS_NODE: 806 /* this option should be at least 1 byte long */ 807 if (len < 1) { 808 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 809 break; 810 } 811 tag = *bp++; 812 --len; 813 ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag))); 814 break; 815 816 case TAG_OPT_OVERLOAD: 817 /* this option should be at least 1 byte long */ 818 if (len < 1) { 819 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 820 break; 821 } 822 tag = *bp++; 823 --len; 824 ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag))); 825 break; 826 827 case TAG_CLIENT_FQDN: 828 /* this option should be at least 3 bytes long */ 829 if (len < 3) { 830 ND_PRINT((ndo, "ERROR: length < 3 bytes")); 831 bp += len; 832 len = 0; 833 break; 834 } 835 if (*bp) 836 ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp))); 837 bp++; 838 if (*bp || *(bp+1)) 839 ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1))); 840 bp += 2; 841 ND_PRINT((ndo, "\"")); 842 if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) { 843 ND_PRINT((ndo, "\"")); 844 goto trunc; 845 } 846 ND_PRINT((ndo, "\"")); 847 bp += len - 3; 848 len = 0; 849 break; 850 851 case TAG_CLIENT_ID: 852 { 853 int type; 854 855 /* this option should be at least 1 byte long */ 856 if (len < 1) { 857 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 858 break; 859 } 860 type = *bp++; 861 len--; 862 if (type == 0) { 863 ND_PRINT((ndo, "\"")); 864 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 865 ND_PRINT((ndo, "\"")); 866 goto trunc; 867 } 868 ND_PRINT((ndo, "\"")); 869 bp += len; 870 len = 0; 871 break; 872 } else { 873 ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type))); 874 while (len > 0) { 875 if (!first) 876 ND_PRINT((ndo, ":")); 877 ND_PRINT((ndo, "%02x", *bp)); 878 ++bp; 879 --len; 880 first = 0; 881 } 882 } 883 break; 884 } 885 886 case TAG_AGENT_CIRCUIT: 887 while (len >= 2) { 888 subopt = *bp++; 889 suboptlen = *bp++; 890 len -= 2; 891 if (suboptlen > len) { 892 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option", 893 tok2str(agent_suboption_values, "Unknown", subopt), 894 subopt, 895 suboptlen)); 896 bp += len; 897 len = 0; 898 break; 899 } 900 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ", 901 tok2str(agent_suboption_values, "Unknown", subopt), 902 subopt, 903 suboptlen)); 904 switch (subopt) { 905 906 case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */ 907 case AGENT_SUBOPTION_REMOTE_ID: 908 case AGENT_SUBOPTION_SUBSCRIBER_ID: 909 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) 910 goto trunc; 911 break; 912 913 default: 914 print_unknown_data(ndo, bp, "\n\t\t", suboptlen); 915 } 916 917 len -= suboptlen; 918 bp += suboptlen; 919 } 920 break; 921 922 case TAG_CLASSLESS_STATIC_RT: 923 case TAG_CLASSLESS_STA_RT_MS: 924 { 925 u_int mask_width, significant_octets, i; 926 927 /* this option should be at least 5 bytes long */ 928 if (len < 5) { 929 ND_PRINT((ndo, "ERROR: length < 5 bytes")); 930 bp += len; 931 len = 0; 932 break; 933 } 934 while (len > 0) { 935 if (!first) 936 ND_PRINT((ndo, ",")); 937 mask_width = *bp++; 938 len--; 939 /* mask_width <= 32 */ 940 if (mask_width > 32) { 941 ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width)); 942 bp += len; 943 len = 0; 944 break; 945 } 946 significant_octets = (mask_width + 7) / 8; 947 /* significant octets + router(4) */ 948 if (len < significant_octets + 4) { 949 ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4)); 950 bp += len; 951 len = 0; 952 break; 953 } 954 ND_PRINT((ndo, "(")); 955 if (mask_width == 0) 956 ND_PRINT((ndo, "default")); 957 else { 958 for (i = 0; i < significant_octets ; i++) { 959 if (i > 0) 960 ND_PRINT((ndo, ".")); 961 ND_PRINT((ndo, "%d", *bp++)); 962 } 963 for (i = significant_octets ; i < 4 ; i++) 964 ND_PRINT((ndo, ".0")); 965 ND_PRINT((ndo, "/%d", mask_width)); 966 } 967 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 968 ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul))); 969 bp += sizeof(ul); 970 len -= (significant_octets + 4); 971 first = 0; 972 } 973 break; 974 } 975 976 case TAG_USER_CLASS: 977 { 978 u_int suboptnumber = 1; 979 980 first = 1; 981 if (len < 2) { 982 ND_PRINT((ndo, "ERROR: length < 2 bytes")); 983 bp += len; 984 len = 0; 985 break; 986 } 987 while (len > 0) { 988 suboptlen = *bp++; 989 len--; 990 ND_PRINT((ndo, "\n\t ")); 991 ND_PRINT((ndo, "instance#%u: ", suboptnumber)); 992 if (suboptlen == 0) { 993 ND_PRINT((ndo, "ERROR: suboption length must be non-zero")); 994 bp += len; 995 len = 0; 996 break; 997 } 998 if (len < suboptlen) { 999 ND_PRINT((ndo, "ERROR: invalid option")); 1000 bp += len; 1001 len = 0; 1002 break; 1003 } 1004 ND_PRINT((ndo, "\"")); 1005 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) { 1006 ND_PRINT((ndo, "\"")); 1007 goto trunc; 1008 } 1009 ND_PRINT((ndo, "\"")); 1010 ND_PRINT((ndo, ", length %d", suboptlen)); 1011 suboptnumber++; 1012 len -= suboptlen; 1013 bp += suboptlen; 1014 } 1015 break; 1016 } 1017 1018 default: 1019 ND_PRINT((ndo, "[unknown special tag %u, size %u]", 1020 tag, len)); 1021 bp += len; 1022 len = 0; 1023 break; 1024 } 1025 break; 1026 } 1027 /* Data left over? */ 1028 if (len) { 1029 ND_PRINT((ndo, "\n\t trailing data length %u", len)); 1030 bp += len; 1031 } 1032 } 1033 return; 1034 trunc: 1035 ND_PRINT((ndo, "|[rfc1048]")); 1036 } 1037 1038 static void 1039 cmu_print(netdissect_options *ndo, 1040 register const u_char *bp) 1041 { 1042 register const struct cmu_vend *cmu; 1043 1044 #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \ 1045 if (cmu->m.s_addr != 0) \ 1046 ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); } 1047 1048 ND_PRINT((ndo, " vend-cmu")); 1049 cmu = (const struct cmu_vend *)bp; 1050 1051 /* Only print if there are unknown bits */ 1052 ND_TCHECK(cmu->v_flags); 1053 if ((cmu->v_flags & ~(VF_SMASK)) != 0) 1054 ND_PRINT((ndo, " F:0x%x", cmu->v_flags)); 1055 PRINTCMUADDR(v_dgate, "DG"); 1056 PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*"); 1057 PRINTCMUADDR(v_dns1, "NS1"); 1058 PRINTCMUADDR(v_dns2, "NS2"); 1059 PRINTCMUADDR(v_ins1, "IEN1"); 1060 PRINTCMUADDR(v_ins2, "IEN2"); 1061 PRINTCMUADDR(v_ts1, "TS1"); 1062 PRINTCMUADDR(v_ts2, "TS2"); 1063 return; 1064 1065 trunc: 1066 ND_PRINT((ndo, "%s", tstr)); 1067 #undef PRINTCMUADDR 1068 } 1069 1070 static char * 1071 client_fqdn_flags(u_int flags) 1072 { 1073 static char buf[8+1]; 1074 int i = 0; 1075 1076 if (flags & CLIENT_FQDN_FLAGS_S) 1077 buf[i++] = 'S'; 1078 if (flags & CLIENT_FQDN_FLAGS_O) 1079 buf[i++] = 'O'; 1080 if (flags & CLIENT_FQDN_FLAGS_E) 1081 buf[i++] = 'E'; 1082 if (flags & CLIENT_FQDN_FLAGS_N) 1083 buf[i++] = 'N'; 1084 buf[i] = '\0'; 1085 1086 return buf; 1087 } 1088
Indexes created Wed Aug 19 00:25:20 UTC 2026