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 #include <sys/cdefs.h> 25 #ifndef lint 26 __RCSID("$NetBSD: print-bootp.c,v 1.9 2017/09/08 14:01:13 christos Exp $"); 27 #endif 28 29 #ifdef HAVE_CONFIG_H 30 #include "config.h" 31 #endif 32 33 #include <netdissect-stdinc.h> 34 35 #include <string.h> 36 37 #include "netdissect.h" 38 #include "addrtoname.h" 39 #include "extract.h" 40 41 static const char tstr[] = " [|bootp]"; 42 43 /* 44 * Bootstrap Protocol (BOOTP). RFC951 and RFC1048. 45 * 46 * This file specifies the "implementation-independent" BOOTP protocol 47 * information which is common to both client and server. 48 * 49 * Copyright 1988 by Carnegie Mellon. 50 * 51 * Permission to use, copy, modify, and distribute this program for any 52 * purpose and without fee is hereby granted, provided that this copyright 53 * and permission notice appear on all copies and supporting documentation, 54 * the name of Carnegie Mellon not be used in advertising or publicity 55 * pertaining to distribution of the program without specific prior 56 * permission, and notice be given in supporting documentation that copying 57 * and distribution is by permission of Carnegie Mellon and Stanford 58 * University. Carnegie Mellon makes no representations about the 59 * suitability of this software for any purpose. It is provided "as is" 60 * without express or implied warranty. 61 */ 62 63 struct bootp { 64 uint8_t bp_op; /* packet opcode type */ 65 uint8_t bp_htype; /* hardware addr type */ 66 uint8_t bp_hlen; /* hardware addr length */ 67 uint8_t bp_hops; /* gateway hops */ 68 uint32_t bp_xid; /* transaction ID */ 69 uint16_t bp_secs; /* seconds since boot began */ 70 uint16_t bp_flags; /* flags - see bootp_flag_values[] 71 in print-bootp.c */ 72 struct in_addr bp_ciaddr; /* client IP address */ 73 struct in_addr bp_yiaddr; /* 'your' IP address */ 74 struct in_addr bp_siaddr; /* server IP address */ 75 struct in_addr bp_giaddr; /* gateway IP address */ 76 uint8_t bp_chaddr[16]; /* client hardware address */ 77 uint8_t bp_sname[64]; /* server host name */ 78 uint8_t bp_file[128]; /* boot file name */ 79 uint8_t bp_vend[64]; /* vendor-specific area */ 80 } UNALIGNED; 81 82 #define BOOTPREPLY 2 83 #define BOOTPREQUEST 1 84 85 /* 86 * Vendor magic cookie (v_magic) for CMU 87 */ 88 #define VM_CMU "CMU" 89 90 /* 91 * Vendor magic cookie (v_magic) for RFC1048 92 */ 93 #define VM_RFC1048 { 99, 130, 83, 99 } 94 95 /* 96 * RFC1048 tag values used to specify what information is being supplied in 97 * the vendor field of the packet. 98 */ 99 100 #define TAG_PAD ((uint8_t) 0) 101 #define TAG_SUBNET_MASK ((uint8_t) 1) 102 #define TAG_TIME_OFFSET ((uint8_t) 2) 103 #define TAG_GATEWAY ((uint8_t) 3) 104 #define TAG_TIME_SERVER ((uint8_t) 4) 105 #define TAG_NAME_SERVER ((uint8_t) 5) 106 #define TAG_DOMAIN_SERVER ((uint8_t) 6) 107 #define TAG_LOG_SERVER ((uint8_t) 7) 108 #define TAG_COOKIE_SERVER ((uint8_t) 8) 109 #define TAG_LPR_SERVER ((uint8_t) 9) 110 #define TAG_IMPRESS_SERVER ((uint8_t) 10) 111 #define TAG_RLP_SERVER ((uint8_t) 11) 112 #define TAG_HOSTNAME ((uint8_t) 12) 113 #define TAG_BOOTSIZE ((uint8_t) 13) 114 #define TAG_END ((uint8_t) 255) 115 /* RFC1497 tags */ 116 #define TAG_DUMPPATH ((uint8_t) 14) 117 #define TAG_DOMAINNAME ((uint8_t) 15) 118 #define TAG_SWAP_SERVER ((uint8_t) 16) 119 #define TAG_ROOTPATH ((uint8_t) 17) 120 #define TAG_EXTPATH ((uint8_t) 18) 121 /* RFC2132 */ 122 #define TAG_IP_FORWARD ((uint8_t) 19) 123 #define TAG_NL_SRCRT ((uint8_t) 20) 124 #define TAG_PFILTERS ((uint8_t) 21) 125 #define TAG_REASS_SIZE ((uint8_t) 22) 126 #define TAG_DEF_TTL ((uint8_t) 23) 127 #define TAG_MTU_TIMEOUT ((uint8_t) 24) 128 #define TAG_MTU_TABLE ((uint8_t) 25) 129 #define TAG_INT_MTU ((uint8_t) 26) 130 #define TAG_LOCAL_SUBNETS ((uint8_t) 27) 131 #define TAG_BROAD_ADDR ((uint8_t) 28) 132 #define TAG_DO_MASK_DISC ((uint8_t) 29) 133 #define TAG_SUPPLY_MASK ((uint8_t) 30) 134 #define TAG_DO_RDISC ((uint8_t) 31) 135 #define TAG_RTR_SOL_ADDR ((uint8_t) 32) 136 #define TAG_STATIC_ROUTE ((uint8_t) 33) 137 #define TAG_USE_TRAILERS ((uint8_t) 34) 138 #define TAG_ARP_TIMEOUT ((uint8_t) 35) 139 #define TAG_ETH_ENCAP ((uint8_t) 36) 140 #define TAG_TCP_TTL ((uint8_t) 37) 141 #define TAG_TCP_KEEPALIVE ((uint8_t) 38) 142 #define TAG_KEEPALIVE_GO ((uint8_t) 39) 143 #define TAG_NIS_DOMAIN ((uint8_t) 40) 144 #define TAG_NIS_SERVERS ((uint8_t) 41) 145 #define TAG_NTP_SERVERS ((uint8_t) 42) 146 #define TAG_VENDOR_OPTS ((uint8_t) 43) 147 #define TAG_NETBIOS_NS ((uint8_t) 44) 148 #define TAG_NETBIOS_DDS ((uint8_t) 45) 149 #define TAG_NETBIOS_NODE ((uint8_t) 46) 150 #define TAG_NETBIOS_SCOPE ((uint8_t) 47) 151 #define TAG_XWIN_FS ((uint8_t) 48) 152 #define TAG_XWIN_DM ((uint8_t) 49) 153 #define TAG_NIS_P_DOMAIN ((uint8_t) 64) 154 #define TAG_NIS_P_SERVERS ((uint8_t) 65) 155 #define TAG_MOBILE_HOME ((uint8_t) 68) 156 #define TAG_SMPT_SERVER ((uint8_t) 69) 157 #define TAG_POP3_SERVER ((uint8_t) 70) 158 #define TAG_NNTP_SERVER ((uint8_t) 71) 159 #define TAG_WWW_SERVER ((uint8_t) 72) 160 #define TAG_FINGER_SERVER ((uint8_t) 73) 161 #define TAG_IRC_SERVER ((uint8_t) 74) 162 #define TAG_STREETTALK_SRVR ((uint8_t) 75) 163 #define TAG_STREETTALK_STDA ((uint8_t) 76) 164 /* DHCP options */ 165 #define TAG_REQUESTED_IP ((uint8_t) 50) 166 #define TAG_IP_LEASE ((uint8_t) 51) 167 #define TAG_OPT_OVERLOAD ((uint8_t) 52) 168 #define TAG_TFTP_SERVER ((uint8_t) 66) 169 #define TAG_BOOTFILENAME ((uint8_t) 67) 170 #define TAG_DHCP_MESSAGE ((uint8_t) 53) 171 #define TAG_SERVER_ID ((uint8_t) 54) 172 #define TAG_PARM_REQUEST ((uint8_t) 55) 173 #define TAG_MESSAGE ((uint8_t) 56) 174 #define TAG_MAX_MSG_SIZE ((uint8_t) 57) 175 #define TAG_RENEWAL_TIME ((uint8_t) 58) 176 #define TAG_REBIND_TIME ((uint8_t) 59) 177 #define TAG_VENDOR_CLASS ((uint8_t) 60) 178 #define TAG_CLIENT_ID ((uint8_t) 61) 179 /* RFC 2241 */ 180 #define TAG_NDS_SERVERS ((uint8_t) 85) 181 #define TAG_NDS_TREE_NAME ((uint8_t) 86) 182 #define TAG_NDS_CONTEXT ((uint8_t) 87) 183 /* RFC 2242 */ 184 #define TAG_NDS_IPDOMAIN ((uint8_t) 62) 185 #define TAG_NDS_IPINFO ((uint8_t) 63) 186 /* RFC 2485 */ 187 #define TAG_OPEN_GROUP_UAP ((uint8_t) 98) 188 /* RFC 2563 */ 189 #define TAG_DISABLE_AUTOCONF ((uint8_t) 116) 190 /* RFC 2610 */ 191 #define TAG_SLP_DA ((uint8_t) 78) 192 #define TAG_SLP_SCOPE ((uint8_t) 79) 193 /* RFC 2937 */ 194 #define TAG_NS_SEARCH ((uint8_t) 117) 195 /* RFC 3004 - The User Class Option for DHCP */ 196 #define TAG_USER_CLASS ((uint8_t) 77) 197 /* RFC 3011 */ 198 #define TAG_IP4_SUBNET_SELECT ((uint8_t) 118) 199 /* RFC 3442 */ 200 #define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121) 201 #define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249) 202 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */ 203 #define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150) 204 /* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */ 205 #define TAG_SLP_NAMING_AUTH ((uint8_t) 80) 206 #define TAG_CLIENT_FQDN ((uint8_t) 81) 207 #define TAG_AGENT_CIRCUIT ((uint8_t) 82) 208 #define TAG_AGENT_REMOTE ((uint8_t) 83) 209 #define TAG_AGENT_MASK ((uint8_t) 84) 210 #define TAG_TZ_STRING ((uint8_t) 88) 211 #define TAG_FQDN_OPTION ((uint8_t) 89) 212 #define TAG_AUTH ((uint8_t) 90) 213 #define TAG_VINES_SERVERS ((uint8_t) 91) 214 #define TAG_SERVER_RANK ((uint8_t) 92) 215 #define TAG_CLIENT_ARCH ((uint8_t) 93) 216 #define TAG_CLIENT_NDI ((uint8_t) 94) 217 #define TAG_CLIENT_GUID ((uint8_t) 97) 218 #define TAG_LDAP_URL ((uint8_t) 95) 219 #define TAG_6OVER4 ((uint8_t) 96) 220 /* RFC 4833, TZ codes */ 221 #define TAG_TZ_PCODE ((uint8_t) 100) 222 #define TAG_TZ_TCODE ((uint8_t) 101) 223 #define TAG_IPX_COMPAT ((uint8_t) 110) 224 #define TAG_NETINFO_PARENT ((uint8_t) 112) 225 #define TAG_NETINFO_PARENT_TAG ((uint8_t) 113) 226 #define TAG_URL ((uint8_t) 114) 227 #define TAG_FAILOVER ((uint8_t) 115) 228 #define TAG_EXTENDED_REQUEST ((uint8_t) 126) 229 #define TAG_EXTENDED_OPTION ((uint8_t) 127) 230 #define TAG_MUDURL ((uint8_t) 161) 231 232 /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */ 233 #define DHCPDISCOVER 1 234 #define DHCPOFFER 2 235 #define DHCPREQUEST 3 236 #define DHCPDECLINE 4 237 #define DHCPACK 5 238 #define DHCPNAK 6 239 #define DHCPRELEASE 7 240 #define DHCPINFORM 8 241 242 /* 243 * "vendor" data permitted for CMU bootp clients. 244 */ 245 246 struct cmu_vend { 247 uint8_t v_magic[4]; /* magic number */ 248 uint32_t v_flags; /* flags/opcodes, etc. */ 249 struct in_addr v_smask; /* Subnet mask */ 250 struct in_addr v_dgate; /* Default gateway */ 251 struct in_addr v_dns1, v_dns2; /* Domain name servers */ 252 struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */ 253 struct in_addr v_ts1, v_ts2; /* Time servers */ 254 uint8_t v_unused[24]; /* currently unused */ 255 } UNALIGNED; 256 257 258 /* v_flags values */ 259 #define VF_SMASK 1 /* Subnet mask field contains valid data */ 260 261 /* RFC 4702 DHCP Client FQDN Option */ 262 263 #define CLIENT_FQDN_FLAGS_S 0x01 264 #define CLIENT_FQDN_FLAGS_O 0x02 265 #define CLIENT_FQDN_FLAGS_E 0x04 266 #define CLIENT_FQDN_FLAGS_N 0x08 267 /* end of original bootp.h */ 268 269 static void rfc1048_print(netdissect_options *, const u_char *); 270 static void cmu_print(netdissect_options *, const u_char *); 271 static char *client_fqdn_flags(u_int flags); 272 273 static const struct tok bootp_flag_values[] = { 274 { 0x8000, "Broadcast" }, 275 { 0, NULL} 276 }; 277 278 static const struct tok bootp_op_values[] = { 279 { BOOTPREQUEST, "Request" }, 280 { BOOTPREPLY, "Reply" }, 281 { 0, NULL} 282 }; 283 284 /* 285 * Print bootp requests 286 */ 287 void 288 bootp_print(netdissect_options *ndo, 289 register const u_char *cp, u_int length) 290 { 291 register const struct bootp *bp; 292 static const u_char vm_cmu[4] = VM_CMU; 293 static const u_char vm_rfc1048[4] = VM_RFC1048; 294 295 bp = (const struct bootp *)cp; 296 ND_TCHECK(bp->bp_op); 297 298 ND_PRINT((ndo, "BOOTP/DHCP, %s", 299 tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op))); 300 301 ND_TCHECK(bp->bp_hlen); 302 if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) { 303 ND_TCHECK2(bp->bp_chaddr[0], 6); 304 ND_PRINT((ndo, " from %s", etheraddr_string(ndo, bp->bp_chaddr))); 305 } 306 307 ND_PRINT((ndo, ", length %u", length)); 308 309 if (!ndo->ndo_vflag) 310 return; 311 312 ND_TCHECK(bp->bp_secs); 313 314 /* The usual hardware address type is 1 (10Mb Ethernet) */ 315 if (bp->bp_htype != 1) 316 ND_PRINT((ndo, ", htype %d", bp->bp_htype)); 317 318 /* The usual length for 10Mb Ethernet address is 6 bytes */ 319 if (bp->bp_htype != 1 || bp->bp_hlen != 6) 320 ND_PRINT((ndo, ", hlen %d", bp->bp_hlen)); 321 322 /* Only print interesting fields */ 323 if (bp->bp_hops) 324 ND_PRINT((ndo, ", hops %d", bp->bp_hops)); 325 if (EXTRACT_32BITS(&bp->bp_xid)) 326 ND_PRINT((ndo, ", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid))); 327 if (EXTRACT_16BITS(&bp->bp_secs)) 328 ND_PRINT((ndo, ", secs %d", EXTRACT_16BITS(&bp->bp_secs))); 329 330 ND_TCHECK(bp->bp_flags); 331 ND_PRINT((ndo, ", Flags [%s]", 332 bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)))); 333 if (ndo->ndo_vflag > 1) 334 ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags))); 335 336 /* Client's ip address */ 337 ND_TCHECK(bp->bp_ciaddr); 338 if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr)) 339 ND_PRINT((ndo, "\n\t Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr))); 340 341 /* 'your' ip address (bootp client) */ 342 ND_TCHECK(bp->bp_yiaddr); 343 if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr)) 344 ND_PRINT((ndo, "\n\t Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr))); 345 346 /* Server's ip address */ 347 ND_TCHECK(bp->bp_siaddr); 348 if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr)) 349 ND_PRINT((ndo, "\n\t Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr))); 350 351 /* Gateway's ip address */ 352 ND_TCHECK(bp->bp_giaddr); 353 if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr)) 354 ND_PRINT((ndo, "\n\t Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr))); 355 356 /* Client's Ethernet address */ 357 if (bp->bp_htype == 1 && bp->bp_hlen == 6) { 358 ND_TCHECK2(bp->bp_chaddr[0], 6); 359 ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr))); 360 } 361 362 ND_TCHECK2(bp->bp_sname[0], 1); /* check first char only */ 363 if (*bp->bp_sname) { 364 ND_PRINT((ndo, "\n\t sname \"")); 365 if (fn_printztn(ndo, bp->bp_sname, (u_int)sizeof bp->bp_sname, 366 ndo->ndo_snapend)) { 367 ND_PRINT((ndo, "\"")); 368 ND_PRINT((ndo, "%s", tstr + 1)); 369 return; 370 } 371 ND_PRINT((ndo, "\"")); 372 } 373 ND_TCHECK2(bp->bp_file[0], 1); /* check first char only */ 374 if (*bp->bp_file) { 375 ND_PRINT((ndo, "\n\t file \"")); 376 if (fn_printztn(ndo, bp->bp_file, (u_int)sizeof bp->bp_file, 377 ndo->ndo_snapend)) { 378 ND_PRINT((ndo, "\"")); 379 ND_PRINT((ndo, "%s", tstr + 1)); 380 return; 381 } 382 ND_PRINT((ndo, "\"")); 383 } 384 385 /* Decode the vendor buffer */ 386 ND_TCHECK(bp->bp_vend[0]); 387 if (memcmp((const char *)bp->bp_vend, vm_rfc1048, 388 sizeof(uint32_t)) == 0) 389 rfc1048_print(ndo, bp->bp_vend); 390 else if (memcmp((const char *)bp->bp_vend, vm_cmu, 391 sizeof(uint32_t)) == 0) 392 cmu_print(ndo, bp->bp_vend); 393 else { 394 uint32_t ul; 395 396 ul = EXTRACT_32BITS(&bp->bp_vend); 397 if (ul != 0) 398 ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul)); 399 } 400 401 return; 402 trunc: 403 ND_PRINT((ndo, "%s", tstr)); 404 } 405 406 /* 407 * The first character specifies the format to print: 408 * i - ip address (32 bits) 409 * p - ip address pairs (32 bits + 32 bits) 410 * l - long (32 bits) 411 * L - unsigned long (32 bits) 412 * s - short (16 bits) 413 * b - period-seperated decimal bytes (variable length) 414 * x - colon-seperated hex bytes (variable length) 415 * a - ascii string (variable length) 416 * B - on/off (8 bits) 417 * $ - special (explicit code to handle) 418 */ 419 static const struct tok tag2str[] = { 420 /* RFC1048 tags */ 421 { TAG_PAD, " PAD" }, 422 { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */ 423 { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */ 424 { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */ 425 { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */ 426 { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */ 427 { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */ 428 { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */ 429 { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */ 430 { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */ 431 { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */ 432 { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */ 433 { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */ 434 { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */ 435 { TAG_END, " END" }, 436 /* RFC1497 tags */ 437 { TAG_DUMPPATH, "aDP" }, 438 { TAG_DOMAINNAME, "aDomain-Name" }, 439 { TAG_SWAP_SERVER, "iSS" }, 440 { TAG_ROOTPATH, "aRP" }, 441 { TAG_EXTPATH, "aEP" }, 442 /* RFC2132 tags */ 443 { TAG_IP_FORWARD, "BIPF" }, 444 { TAG_NL_SRCRT, "BSRT" }, 445 { TAG_PFILTERS, "pPF" }, 446 { TAG_REASS_SIZE, "sRSZ" }, 447 { TAG_DEF_TTL, "bTTL" }, 448 { TAG_MTU_TIMEOUT, "lMTU-Timeout" }, 449 { TAG_MTU_TABLE, "sMTU-Table" }, 450 { TAG_INT_MTU, "sMTU" }, 451 { TAG_LOCAL_SUBNETS, "BLSN" }, 452 { TAG_BROAD_ADDR, "iBR" }, 453 { TAG_DO_MASK_DISC, "BMD" }, 454 { TAG_SUPPLY_MASK, "BMS" }, 455 { TAG_DO_RDISC, "BRouter-Discovery" }, 456 { TAG_RTR_SOL_ADDR, "iRSA" }, 457 { TAG_STATIC_ROUTE, "pStatic-Route" }, 458 { TAG_USE_TRAILERS, "BUT" }, 459 { TAG_ARP_TIMEOUT, "lAT" }, 460 { TAG_ETH_ENCAP, "BIE" }, 461 { TAG_TCP_TTL, "bTT" }, 462 { TAG_TCP_KEEPALIVE, "lKI" }, 463 { TAG_KEEPALIVE_GO, "BKG" }, 464 { TAG_NIS_DOMAIN, "aYD" }, 465 { TAG_NIS_SERVERS, "iYS" }, 466 { TAG_NTP_SERVERS, "iNTP" }, 467 { TAG_VENDOR_OPTS, "bVendor-Option" }, 468 { TAG_NETBIOS_NS, "iNetbios-Name-Server" }, 469 { TAG_NETBIOS_DDS, "iWDD" }, 470 { TAG_NETBIOS_NODE, "$Netbios-Node" }, 471 { TAG_NETBIOS_SCOPE, "aNetbios-Scope" }, 472 { TAG_XWIN_FS, "iXFS" }, 473 { TAG_XWIN_DM, "iXDM" }, 474 { TAG_NIS_P_DOMAIN, "sN+D" }, 475 { TAG_NIS_P_SERVERS, "iN+S" }, 476 { TAG_MOBILE_HOME, "iMH" }, 477 { TAG_SMPT_SERVER, "iSMTP" }, 478 { TAG_POP3_SERVER, "iPOP3" }, 479 { TAG_NNTP_SERVER, "iNNTP" }, 480 { TAG_WWW_SERVER, "iWWW" }, 481 { TAG_FINGER_SERVER, "iFG" }, 482 { TAG_IRC_SERVER, "iIRC" }, 483 { TAG_STREETTALK_SRVR, "iSTS" }, 484 { TAG_STREETTALK_STDA, "iSTDA" }, 485 { TAG_REQUESTED_IP, "iRequested-IP" }, 486 { TAG_IP_LEASE, "lLease-Time" }, 487 { TAG_OPT_OVERLOAD, "$OO" }, 488 { TAG_TFTP_SERVER, "aTFTP" }, 489 { TAG_BOOTFILENAME, "aBF" }, 490 { TAG_DHCP_MESSAGE, " DHCP-Message" }, 491 { TAG_SERVER_ID, "iServer-ID" }, 492 { TAG_PARM_REQUEST, "bParameter-Request" }, 493 { TAG_MESSAGE, "aMSG" }, 494 { TAG_MAX_MSG_SIZE, "sMSZ" }, 495 { TAG_RENEWAL_TIME, "lRN" }, 496 { TAG_REBIND_TIME, "lRB" }, 497 { TAG_VENDOR_CLASS, "aVendor-Class" }, 498 { TAG_CLIENT_ID, "$Client-ID" }, 499 /* RFC 2485 */ 500 { TAG_OPEN_GROUP_UAP, "aUAP" }, 501 /* RFC 2563 */ 502 { TAG_DISABLE_AUTOCONF, "BNOAUTO" }, 503 /* RFC 2610 */ 504 { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */ 505 { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */ 506 /* RFC 2937 */ 507 { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */ 508 /* RFC 3004 - The User Class Option for DHCP */ 509 { TAG_USER_CLASS, "$User-Class" }, 510 /* RFC 3011 */ 511 { TAG_IP4_SUBNET_SELECT, "iSUBNET" }, 512 /* RFC 3442 */ 513 { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" }, 514 { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" }, 515 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */ 516 { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" }, 517 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */ 518 { TAG_SLP_NAMING_AUTH, "aSLP-NA" }, 519 { TAG_CLIENT_FQDN, "$FQDN" }, 520 { TAG_AGENT_CIRCUIT, "$Agent-Information" }, 521 { TAG_AGENT_REMOTE, "bARMT" }, 522 { TAG_AGENT_MASK, "bAMSK" }, 523 { TAG_TZ_STRING, "aTZSTR" }, 524 { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */ 525 { TAG_AUTH, "bAUTH" }, /* XXX 'b' */ 526 { TAG_VINES_SERVERS, "iVINES" }, 527 { TAG_SERVER_RANK, "sRANK" }, 528 { TAG_CLIENT_ARCH, "sARCH" }, 529 { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */ 530 { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */ 531 { TAG_LDAP_URL, "aLDAP" }, 532 { TAG_6OVER4, "i6o4" }, 533 { TAG_TZ_PCODE, "aPOSIX-TZ" }, 534 { TAG_TZ_TCODE, "aTZ-Name" }, 535 { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */ 536 { TAG_NETINFO_PARENT, "iNI" }, 537 { TAG_NETINFO_PARENT_TAG, "aNITAG" }, 538 { TAG_URL, "aURL" }, 539 { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */ 540 { TAG_MUDURL, "aMUD-URL" }, 541 { 0, NULL } 542 }; 543 /* 2-byte extended tags */ 544 static const struct tok xtag2str[] = { 545 { 0, NULL } 546 }; 547 548 /* DHCP "options overload" types */ 549 static const struct tok oo2str[] = { 550 { 1, "file" }, 551 { 2, "sname" }, 552 { 3, "file+sname" }, 553 { 0, NULL } 554 }; 555 556 /* NETBIOS over TCP/IP node type options */ 557 static const struct tok nbo2str[] = { 558 { 0x1, "b-node" }, 559 { 0x2, "p-node" }, 560 { 0x4, "m-node" }, 561 { 0x8, "h-node" }, 562 { 0, NULL } 563 }; 564 565 /* ARP Hardware types, for Client-ID option */ 566 static const struct tok arp2str[] = { 567 { 0x1, "ether" }, 568 { 0x6, "ieee802" }, 569 { 0x7, "arcnet" }, 570 { 0xf, "frelay" }, 571 { 0x17, "strip" }, 572 { 0x18, "ieee1394" }, 573 { 0, NULL } 574 }; 575 576 static const struct tok dhcp_msg_values[] = { 577 { DHCPDISCOVER, "Discover" }, 578 { DHCPOFFER, "Offer" }, 579 { DHCPREQUEST, "Request" }, 580 { DHCPDECLINE, "Decline" }, 581 { DHCPACK, "ACK" }, 582 { DHCPNAK, "NACK" }, 583 { DHCPRELEASE, "Release" }, 584 { DHCPINFORM, "Inform" }, 585 { 0, NULL } 586 }; 587 588 #define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */ 589 #define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */ 590 #define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */ 591 static const struct tok agent_suboption_values[] = { 592 { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" }, 593 { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" }, 594 { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" }, 595 { 0, NULL } 596 }; 597 598 599 static void 600 rfc1048_print(netdissect_options *ndo, 601 register const u_char *bp) 602 { 603 register uint16_t tag; 604 register u_int len; 605 register const char *cp; 606 register char c; 607 int first, idx; 608 uint32_t ul; 609 uint16_t us; 610 uint8_t uc, subopt, suboptlen; 611 612 ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions")); 613 614 /* Step over magic cookie */ 615 ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp))); 616 bp += sizeof(int32_t); 617 618 /* Loop while we there is a tag left in the buffer */ 619 while (ND_TTEST2(*bp, 1)) { 620 tag = *bp++; 621 if (tag == TAG_PAD && ndo->ndo_vflag < 3) 622 continue; 623 if (tag == TAG_END && ndo->ndo_vflag < 3) 624 return; 625 if (tag == TAG_EXTENDED_OPTION) { 626 ND_TCHECK2(*(bp + 1), 2); 627 tag = EXTRACT_16BITS(bp + 1); 628 /* XXX we don't know yet if the IANA will 629 * preclude overlap of 1-byte and 2-byte spaces. 630 * If not, we need to offset tag after this step. 631 */ 632 cp = tok2str(xtag2str, "?xT%u", tag); 633 } else 634 cp = tok2str(tag2str, "?T%u", tag); 635 c = *cp++; 636 637 if (tag == TAG_PAD || tag == TAG_END) 638 len = 0; 639 else { 640 /* Get the length; check for truncation */ 641 ND_TCHECK2(*bp, 1); 642 len = *bp++; 643 } 644 645 ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len, 646 len > 0 ? ": " : "")); 647 648 if (tag == TAG_PAD && ndo->ndo_vflag > 2) { 649 u_int ntag = 1; 650 while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) { 651 bp++; 652 ntag++; 653 } 654 if (ntag > 1) 655 ND_PRINT((ndo, ", occurs %u", ntag)); 656 } 657 658 if (!ND_TTEST2(*bp, len)) { 659 ND_PRINT((ndo, "[|rfc1048 %u]", len)); 660 return; 661 } 662 663 if (tag == TAG_DHCP_MESSAGE && len == 1) { 664 uc = *bp++; 665 ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc))); 666 continue; 667 } 668 669 if (tag == TAG_PARM_REQUEST) { 670 idx = 0; 671 while (len-- > 0) { 672 uc = *bp++; 673 cp = tok2str(tag2str, "?Option %u", uc); 674 if (idx % 4 == 0) 675 ND_PRINT((ndo, "\n\t ")); 676 else 677 ND_PRINT((ndo, ", ")); 678 ND_PRINT((ndo, "%s", cp + 1)); 679 idx++; 680 } 681 continue; 682 } 683 684 if (tag == TAG_EXTENDED_REQUEST) { 685 first = 1; 686 while (len > 1) { 687 len -= 2; 688 us = EXTRACT_16BITS(bp); 689 bp += 2; 690 cp = tok2str(xtag2str, "?xT%u", us); 691 if (!first) 692 ND_PRINT((ndo, "+")); 693 ND_PRINT((ndo, "%s", cp + 1)); 694 first = 0; 695 } 696 continue; 697 } 698 699 /* Print data */ 700 if (c == '?') { 701 /* Base default formats for unknown tags on data size */ 702 if (len & 1) 703 c = 'b'; 704 else if (len & 2) 705 c = 's'; 706 else 707 c = 'l'; 708 } 709 first = 1; 710 switch (c) { 711 712 case 'a': 713 /* ascii strings */ 714 ND_PRINT((ndo, "\"")); 715 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 716 ND_PRINT((ndo, "\"")); 717 goto trunc; 718 } 719 ND_PRINT((ndo, "\"")); 720 bp += len; 721 len = 0; 722 break; 723 724 case 'i': 725 case 'l': 726 case 'L': 727 /* ip addresses/32-bit words */ 728 while (len >= sizeof(ul)) { 729 if (!first) 730 ND_PRINT((ndo, ",")); 731 ul = EXTRACT_32BITS(bp); 732 if (c == 'i') { 733 ul = htonl(ul); 734 ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul))); 735 } else if (c == 'L') 736 ND_PRINT((ndo, "%d", ul)); 737 else 738 ND_PRINT((ndo, "%u", ul)); 739 bp += sizeof(ul); 740 len -= sizeof(ul); 741 first = 0; 742 } 743 break; 744 745 case 'p': 746 /* IP address pairs */ 747 while (len >= 2*sizeof(ul)) { 748 if (!first) 749 ND_PRINT((ndo, ",")); 750 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 751 ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul))); 752 bp += sizeof(ul); 753 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 754 ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul))); 755 bp += sizeof(ul); 756 len -= 2*sizeof(ul); 757 first = 0; 758 } 759 break; 760 761 case 's': 762 /* shorts */ 763 while (len >= sizeof(us)) { 764 if (!first) 765 ND_PRINT((ndo, ",")); 766 us = EXTRACT_16BITS(bp); 767 ND_PRINT((ndo, "%u", us)); 768 bp += sizeof(us); 769 len -= sizeof(us); 770 first = 0; 771 } 772 break; 773 774 case 'B': 775 /* boolean */ 776 while (len > 0) { 777 if (!first) 778 ND_PRINT((ndo, ",")); 779 switch (*bp) { 780 case 0: 781 ND_PRINT((ndo, "N")); 782 break; 783 case 1: 784 ND_PRINT((ndo, "Y")); 785 break; 786 default: 787 ND_PRINT((ndo, "%u?", *bp)); 788 break; 789 } 790 ++bp; 791 --len; 792 first = 0; 793 } 794 break; 795 796 case 'b': 797 case 'x': 798 default: 799 /* Bytes */ 800 while (len > 0) { 801 if (!first) 802 ND_PRINT((ndo, c == 'x' ? ":" : ".")); 803 if (c == 'x') 804 ND_PRINT((ndo, "%02x", *bp)); 805 else 806 ND_PRINT((ndo, "%u", *bp)); 807 ++bp; 808 --len; 809 first = 0; 810 } 811 break; 812 813 case '$': 814 /* Guys we can't handle with one of the usual cases */ 815 switch (tag) { 816 817 case TAG_NETBIOS_NODE: 818 /* this option should be at least 1 byte long */ 819 if (len < 1) { 820 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 821 break; 822 } 823 tag = *bp++; 824 --len; 825 ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag))); 826 break; 827 828 case TAG_OPT_OVERLOAD: 829 /* this option should be at least 1 byte long */ 830 if (len < 1) { 831 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 832 break; 833 } 834 tag = *bp++; 835 --len; 836 ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag))); 837 break; 838 839 case TAG_CLIENT_FQDN: 840 /* this option should be at least 3 bytes long */ 841 if (len < 3) { 842 ND_PRINT((ndo, "ERROR: length < 3 bytes")); 843 bp += len; 844 len = 0; 845 break; 846 } 847 if (*bp) 848 ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp))); 849 bp++; 850 if (*bp || *(bp+1)) 851 ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1))); 852 bp += 2; 853 ND_PRINT((ndo, "\"")); 854 if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) { 855 ND_PRINT((ndo, "\"")); 856 goto trunc; 857 } 858 ND_PRINT((ndo, "\"")); 859 bp += len - 3; 860 len = 0; 861 break; 862 863 case TAG_CLIENT_ID: 864 { 865 int type; 866 867 /* this option should be at least 1 byte long */ 868 if (len < 1) { 869 ND_PRINT((ndo, "ERROR: length < 1 bytes")); 870 break; 871 } 872 type = *bp++; 873 len--; 874 if (type == 0) { 875 ND_PRINT((ndo, "\"")); 876 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) { 877 ND_PRINT((ndo, "\"")); 878 goto trunc; 879 } 880 ND_PRINT((ndo, "\"")); 881 bp += len; 882 len = 0; 883 break; 884 } else { 885 ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type))); 886 while (len > 0) { 887 if (!first) 888 ND_PRINT((ndo, ":")); 889 ND_PRINT((ndo, "%02x", *bp)); 890 ++bp; 891 --len; 892 first = 0; 893 } 894 } 895 break; 896 } 897 898 case TAG_AGENT_CIRCUIT: 899 while (len >= 2) { 900 subopt = *bp++; 901 suboptlen = *bp++; 902 len -= 2; 903 if (suboptlen > len) { 904 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option", 905 tok2str(agent_suboption_values, "Unknown", subopt), 906 subopt, 907 suboptlen)); 908 bp += len; 909 len = 0; 910 break; 911 } 912 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ", 913 tok2str(agent_suboption_values, "Unknown", subopt), 914 subopt, 915 suboptlen)); 916 switch (subopt) { 917 918 case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */ 919 case AGENT_SUBOPTION_REMOTE_ID: 920 case AGENT_SUBOPTION_SUBSCRIBER_ID: 921 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) 922 goto trunc; 923 break; 924 925 default: 926 print_unknown_data(ndo, bp, "\n\t\t", suboptlen); 927 } 928 929 len -= suboptlen; 930 bp += suboptlen; 931 } 932 break; 933 934 case TAG_CLASSLESS_STATIC_RT: 935 case TAG_CLASSLESS_STA_RT_MS: 936 { 937 u_int mask_width, significant_octets, i; 938 939 /* this option should be at least 5 bytes long */ 940 if (len < 5) { 941 ND_PRINT((ndo, "ERROR: length < 5 bytes")); 942 bp += len; 943 len = 0; 944 break; 945 } 946 while (len > 0) { 947 if (!first) 948 ND_PRINT((ndo, ",")); 949 mask_width = *bp++; 950 len--; 951 /* mask_width <= 32 */ 952 if (mask_width > 32) { 953 ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width)); 954 bp += len; 955 len = 0; 956 break; 957 } 958 significant_octets = (mask_width + 7) / 8; 959 /* significant octets + router(4) */ 960 if (len < significant_octets + 4) { 961 ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4)); 962 bp += len; 963 len = 0; 964 break; 965 } 966 ND_PRINT((ndo, "(")); 967 if (mask_width == 0) 968 ND_PRINT((ndo, "default")); 969 else { 970 for (i = 0; i < significant_octets ; i++) { 971 if (i > 0) 972 ND_PRINT((ndo, ".")); 973 ND_PRINT((ndo, "%d", *bp++)); 974 } 975 for (i = significant_octets ; i < 4 ; i++) 976 ND_PRINT((ndo, ".0")); 977 ND_PRINT((ndo, "/%d", mask_width)); 978 } 979 memcpy((char *)&ul, (const char *)bp, sizeof(ul)); 980 ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul))); 981 bp += sizeof(ul); 982 len -= (significant_octets + 4); 983 first = 0; 984 } 985 break; 986 } 987 988 case TAG_USER_CLASS: 989 { 990 u_int suboptnumber = 1; 991 992 first = 1; 993 if (len < 2) { 994 ND_PRINT((ndo, "ERROR: length < 2 bytes")); 995 bp += len; 996 len = 0; 997 break; 998 } 999 while (len > 0) { 1000 suboptlen = *bp++; 1001 len--; 1002 ND_PRINT((ndo, "\n\t ")); 1003 ND_PRINT((ndo, "instance#%u: ", suboptnumber)); 1004 if (suboptlen == 0) { 1005 ND_PRINT((ndo, "ERROR: suboption length must be non-zero")); 1006 bp += len; 1007 len = 0; 1008 break; 1009 } 1010 if (len < suboptlen) { 1011 ND_PRINT((ndo, "ERROR: invalid option")); 1012 bp += len; 1013 len = 0; 1014 break; 1015 } 1016 ND_PRINT((ndo, "\"")); 1017 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) { 1018 ND_PRINT((ndo, "\"")); 1019 goto trunc; 1020 } 1021 ND_PRINT((ndo, "\"")); 1022 ND_PRINT((ndo, ", length %d", suboptlen)); 1023 suboptnumber++; 1024 len -= suboptlen; 1025 bp += suboptlen; 1026 } 1027 break; 1028 } 1029 1030 default: 1031 ND_PRINT((ndo, "[unknown special tag %u, size %u]", 1032 tag, len)); 1033 bp += len; 1034 len = 0; 1035 break; 1036 } 1037 break; 1038 } 1039 /* Data left over? */ 1040 if (len) { 1041 ND_PRINT((ndo, "\n\t trailing data length %u", len)); 1042 bp += len; 1043 } 1044 } 1045 return; 1046 trunc: 1047 ND_PRINT((ndo, "|[rfc1048]")); 1048 } 1049 1050 static void 1051 cmu_print(netdissect_options *ndo, 1052 register const u_char *bp) 1053 { 1054 register const struct cmu_vend *cmu; 1055 1056 #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \ 1057 if (cmu->m.s_addr != 0) \ 1058 ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); } 1059 1060 ND_PRINT((ndo, " vend-cmu")); 1061 cmu = (const struct cmu_vend *)bp; 1062 1063 /* Only print if there are unknown bits */ 1064 ND_TCHECK(cmu->v_flags); 1065 if ((cmu->v_flags & ~(VF_SMASK)) != 0) 1066 ND_PRINT((ndo, " F:0x%x", cmu->v_flags)); 1067 PRINTCMUADDR(v_dgate, "DG"); 1068 PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*"); 1069 PRINTCMUADDR(v_dns1, "NS1"); 1070 PRINTCMUADDR(v_dns2, "NS2"); 1071 PRINTCMUADDR(v_ins1, "IEN1"); 1072 PRINTCMUADDR(v_ins2, "IEN2"); 1073 PRINTCMUADDR(v_ts1, "TS1"); 1074 PRINTCMUADDR(v_ts2, "TS2"); 1075 return; 1076 1077 trunc: 1078 ND_PRINT((ndo, "%s", tstr)); 1079 #undef PRINTCMUADDR 1080 } 1081 1082 static char * 1083 client_fqdn_flags(u_int flags) 1084 { 1085 static char buf[8+1]; 1086 int i = 0; 1087 1088 if (flags & CLIENT_FQDN_FLAGS_S) 1089 buf[i++] = 'S'; 1090 if (flags & CLIENT_FQDN_FLAGS_O) 1091 buf[i++] = 'O'; 1092 if (flags & CLIENT_FQDN_FLAGS_E) 1093 buf[i++] = 'E'; 1094 if (flags & CLIENT_FQDN_FLAGS_N) 1095 buf[i++] = 'N'; 1096 buf[i] = '\0'; 1097 1098 return buf; 1099 } 1100