2 * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
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
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.
21 * Format and print bootp packets.
26 #define NETDISSECT_REWORKED
31 #include <tcpdump-stdinc.h>
35 #include "interface.h"
36 #include "addrtoname.h"
39 static const char tstr[] = " [|bootp]";
42 * Bootstrap Protocol (BOOTP). RFC951 and RFC1048.
44 * This file specifies the "implementation-independent" BOOTP protocol
45 * information which is common to both client and server.
47 * Copyright 1988 by Carnegie Mellon.
49 * Permission to use, copy, modify, and distribute this program for any
50 * purpose and without fee is hereby granted, provided that this copyright
51 * and permission notice appear on all copies and supporting documentation,
52 * the name of Carnegie Mellon not be used in advertising or publicity
53 * pertaining to distribution of the program without specific prior
54 * permission, and notice be given in supporting documentation that copying
55 * and distribution is by permission of Carnegie Mellon and Stanford
56 * University. Carnegie Mellon makes no representations about the
57 * suitability of this software for any purpose. It is provided "as is"
58 * without express or implied warranty.
62 uint8_t bp_op; /* packet opcode type */
63 uint8_t bp_htype; /* hardware addr type */
64 uint8_t bp_hlen; /* hardware addr length */
65 uint8_t bp_hops; /* gateway hops */
66 uint32_t bp_xid; /* transaction ID */
67 uint16_t bp_secs; /* seconds since boot began */
68 uint16_t bp_flags; /* flags - see bootp_flag_values[]
70 struct in_addr bp_ciaddr; /* client IP address */
71 struct in_addr bp_yiaddr; /* 'your' IP address */
72 struct in_addr bp_siaddr; /* server IP address */
73 struct in_addr bp_giaddr; /* gateway IP address */
74 uint8_t bp_chaddr[16]; /* client hardware address */
75 uint8_t bp_sname[64]; /* server host name */
76 uint8_t bp_file[128]; /* boot file name */
77 uint8_t bp_vend[64]; /* vendor-specific area */
81 #define BOOTPREQUEST 1
84 * Vendor magic cookie (v_magic) for CMU
89 * Vendor magic cookie (v_magic) for RFC1048
91 #define VM_RFC1048 { 99, 130, 83, 99 }
94 * RFC1048 tag values used to specify what information is being supplied in
95 * the vendor field of the packet.
98 #define TAG_PAD ((uint8_t) 0)
99 #define TAG_SUBNET_MASK ((uint8_t) 1)
100 #define TAG_TIME_OFFSET ((uint8_t) 2)
101 #define TAG_GATEWAY ((uint8_t) 3)
102 #define TAG_TIME_SERVER ((uint8_t) 4)
103 #define TAG_NAME_SERVER ((uint8_t) 5)
104 #define TAG_DOMAIN_SERVER ((uint8_t) 6)
105 #define TAG_LOG_SERVER ((uint8_t) 7)
106 #define TAG_COOKIE_SERVER ((uint8_t) 8)
107 #define TAG_LPR_SERVER ((uint8_t) 9)
108 #define TAG_IMPRESS_SERVER ((uint8_t) 10)
109 #define TAG_RLP_SERVER ((uint8_t) 11)
110 #define TAG_HOSTNAME ((uint8_t) 12)
111 #define TAG_BOOTSIZE ((uint8_t) 13)
112 #define TAG_END ((uint8_t) 255)
114 #define TAG_DUMPPATH ((uint8_t) 14)
115 #define TAG_DOMAINNAME ((uint8_t) 15)
116 #define TAG_SWAP_SERVER ((uint8_t) 16)
117 #define TAG_ROOTPATH ((uint8_t) 17)
118 #define TAG_EXTPATH ((uint8_t) 18)
120 #define TAG_IP_FORWARD ((uint8_t) 19)
121 #define TAG_NL_SRCRT ((uint8_t) 20)
122 #define TAG_PFILTERS ((uint8_t) 21)
123 #define TAG_REASS_SIZE ((uint8_t) 22)
124 #define TAG_DEF_TTL ((uint8_t) 23)
125 #define TAG_MTU_TIMEOUT ((uint8_t) 24)
126 #define TAG_MTU_TABLE ((uint8_t) 25)
127 #define TAG_INT_MTU ((uint8_t) 26)
128 #define TAG_LOCAL_SUBNETS ((uint8_t) 27)
129 #define TAG_BROAD_ADDR ((uint8_t) 28)
130 #define TAG_DO_MASK_DISC ((uint8_t) 29)
131 #define TAG_SUPPLY_MASK ((uint8_t) 30)
132 #define TAG_DO_RDISC ((uint8_t) 31)
133 #define TAG_RTR_SOL_ADDR ((uint8_t) 32)
134 #define TAG_STATIC_ROUTE ((uint8_t) 33)
135 #define TAG_USE_TRAILERS ((uint8_t) 34)
136 #define TAG_ARP_TIMEOUT ((uint8_t) 35)
137 #define TAG_ETH_ENCAP ((uint8_t) 36)
138 #define TAG_TCP_TTL ((uint8_t) 37)
139 #define TAG_TCP_KEEPALIVE ((uint8_t) 38)
140 #define TAG_KEEPALIVE_GO ((uint8_t) 39)
141 #define TAG_NIS_DOMAIN ((uint8_t) 40)
142 #define TAG_NIS_SERVERS ((uint8_t) 41)
143 #define TAG_NTP_SERVERS ((uint8_t) 42)
144 #define TAG_VENDOR_OPTS ((uint8_t) 43)
145 #define TAG_NETBIOS_NS ((uint8_t) 44)
146 #define TAG_NETBIOS_DDS ((uint8_t) 45)
147 #define TAG_NETBIOS_NODE ((uint8_t) 46)
148 #define TAG_NETBIOS_SCOPE ((uint8_t) 47)
149 #define TAG_XWIN_FS ((uint8_t) 48)
150 #define TAG_XWIN_DM ((uint8_t) 49)
151 #define TAG_NIS_P_DOMAIN ((uint8_t) 64)
152 #define TAG_NIS_P_SERVERS ((uint8_t) 65)
153 #define TAG_MOBILE_HOME ((uint8_t) 68)
154 #define TAG_SMPT_SERVER ((uint8_t) 69)
155 #define TAG_POP3_SERVER ((uint8_t) 70)
156 #define TAG_NNTP_SERVER ((uint8_t) 71)
157 #define TAG_WWW_SERVER ((uint8_t) 72)
158 #define TAG_FINGER_SERVER ((uint8_t) 73)
159 #define TAG_IRC_SERVER ((uint8_t) 74)
160 #define TAG_STREETTALK_SRVR ((uint8_t) 75)
161 #define TAG_STREETTALK_STDA ((uint8_t) 76)
163 #define TAG_REQUESTED_IP ((uint8_t) 50)
164 #define TAG_IP_LEASE ((uint8_t) 51)
165 #define TAG_OPT_OVERLOAD ((uint8_t) 52)
166 #define TAG_TFTP_SERVER ((uint8_t) 66)
167 #define TAG_BOOTFILENAME ((uint8_t) 67)
168 #define TAG_DHCP_MESSAGE ((uint8_t) 53)
169 #define TAG_SERVER_ID ((uint8_t) 54)
170 #define TAG_PARM_REQUEST ((uint8_t) 55)
171 #define TAG_MESSAGE ((uint8_t) 56)
172 #define TAG_MAX_MSG_SIZE ((uint8_t) 57)
173 #define TAG_RENEWAL_TIME ((uint8_t) 58)
174 #define TAG_REBIND_TIME ((uint8_t) 59)
175 #define TAG_VENDOR_CLASS ((uint8_t) 60)
176 #define TAG_CLIENT_ID ((uint8_t) 61)
178 #define TAG_NDS_SERVERS ((uint8_t) 85)
179 #define TAG_NDS_TREE_NAME ((uint8_t) 86)
180 #define TAG_NDS_CONTEXT ((uint8_t) 87)
182 #define TAG_NDS_IPDOMAIN ((uint8_t) 62)
183 #define TAG_NDS_IPINFO ((uint8_t) 63)
185 #define TAG_OPEN_GROUP_UAP ((uint8_t) 98)
187 #define TAG_DISABLE_AUTOCONF ((uint8_t) 116)
189 #define TAG_SLP_DA ((uint8_t) 78)
190 #define TAG_SLP_SCOPE ((uint8_t) 79)
192 #define TAG_NS_SEARCH ((uint8_t) 117)
193 /* RFC 3004 - The User Class Option for DHCP */
194 #define TAG_USER_CLASS ((uint8_t) 77)
196 #define TAG_IP4_SUBNET_SELECT ((uint8_t) 118)
198 #define TAG_CLASSLESS_STATIC_RT ((uint8_t) 121)
199 #define TAG_CLASSLESS_STA_RT_MS ((uint8_t) 249)
200 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
201 #define TAG_TFTP_SERVER_ADDRESS ((uint8_t) 150)
202 /* ftp://ftp.isi.edu/.../assignments/bootp-dhcp-extensions */
203 #define TAG_SLP_NAMING_AUTH ((uint8_t) 80)
204 #define TAG_CLIENT_FQDN ((uint8_t) 81)
205 #define TAG_AGENT_CIRCUIT ((uint8_t) 82)
206 #define TAG_AGENT_REMOTE ((uint8_t) 83)
207 #define TAG_AGENT_MASK ((uint8_t) 84)
208 #define TAG_TZ_STRING ((uint8_t) 88)
209 #define TAG_FQDN_OPTION ((uint8_t) 89)
210 #define TAG_AUTH ((uint8_t) 90)
211 #define TAG_VINES_SERVERS ((uint8_t) 91)
212 #define TAG_SERVER_RANK ((uint8_t) 92)
213 #define TAG_CLIENT_ARCH ((uint8_t) 93)
214 #define TAG_CLIENT_NDI ((uint8_t) 94)
215 #define TAG_CLIENT_GUID ((uint8_t) 97)
216 #define TAG_LDAP_URL ((uint8_t) 95)
217 #define TAG_6OVER4 ((uint8_t) 96)
218 #define TAG_PRINTER_NAME ((uint8_t) 100)
219 #define TAG_MDHCP_SERVER ((uint8_t) 101)
220 #define TAG_IPX_COMPAT ((uint8_t) 110)
221 #define TAG_NETINFO_PARENT ((uint8_t) 112)
222 #define TAG_NETINFO_PARENT_TAG ((uint8_t) 113)
223 #define TAG_URL ((uint8_t) 114)
224 #define TAG_FAILOVER ((uint8_t) 115)
225 #define TAG_EXTENDED_REQUEST ((uint8_t) 126)
226 #define TAG_EXTENDED_OPTION ((uint8_t) 127)
228 /* DHCP Message types (values for TAG_DHCP_MESSAGE option) */
229 #define DHCPDISCOVER 1
231 #define DHCPREQUEST 3
232 #define DHCPDECLINE 4
235 #define DHCPRELEASE 7
239 * "vendor" data permitted for CMU bootp clients.
243 uint8_t v_magic[4]; /* magic number */
244 uint32_t v_flags; /* flags/opcodes, etc. */
245 struct in_addr v_smask; /* Subnet mask */
246 struct in_addr v_dgate; /* Default gateway */
247 struct in_addr v_dns1, v_dns2; /* Domain name servers */
248 struct in_addr v_ins1, v_ins2; /* IEN-116 name servers */
249 struct in_addr v_ts1, v_ts2; /* Time servers */
250 uint8_t v_unused[24]; /* currently unused */
255 #define VF_SMASK 1 /* Subnet mask field contains valid data */
257 /* RFC 4702 DHCP Client FQDN Option */
259 #define CLIENT_FQDN_FLAGS_S 0x01
260 #define CLIENT_FQDN_FLAGS_O 0x02
261 #define CLIENT_FQDN_FLAGS_E 0x04
262 #define CLIENT_FQDN_FLAGS_N 0x08
263 /* end of original bootp.h */
265 static void rfc1048_print(netdissect_options *, const u_char *);
266 static void cmu_print(netdissect_options *, const u_char *);
267 static char *client_fqdn_flags(u_int flags);
269 static const struct tok bootp_flag_values[] = {
270 { 0x8000, "Broadcast" },
274 static const struct tok bootp_op_values[] = {
275 { BOOTPREQUEST, "Request" },
276 { BOOTPREPLY, "Reply" },
281 * Print bootp requests
284 bootp_print(netdissect_options *ndo,
285 register const u_char *cp, u_int length)
287 register const struct bootp *bp;
288 static const u_char vm_cmu[4] = VM_CMU;
289 static const u_char vm_rfc1048[4] = VM_RFC1048;
291 bp = (const struct bootp *)cp;
292 ND_TCHECK(bp->bp_op);
294 ND_PRINT((ndo, "BOOTP/DHCP, %s",
295 tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op)));
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)));
302 ND_PRINT((ndo, ", length %u", length));
307 ND_TCHECK(bp->bp_secs);
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));
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));
317 /* Only print interesting fields */
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)));
325 ND_PRINT((ndo, ", Flags [%s]",
326 bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags))));
327 if (ndo->ndo_vflag > 1)
328 ND_PRINT((ndo, " (0x%04x)", EXTRACT_16BITS(&bp->bp_flags)));
330 /* Client's ip address */
331 ND_TCHECK(bp->bp_ciaddr);
332 if (EXTRACT_32BITS(&bp->bp_ciaddr.s_addr))
333 ND_PRINT((ndo, "\n\t Client-IP %s", ipaddr_string(ndo, &bp->bp_ciaddr)));
335 /* 'your' ip address (bootp client) */
336 ND_TCHECK(bp->bp_yiaddr);
337 if (EXTRACT_32BITS(&bp->bp_yiaddr.s_addr))
338 ND_PRINT((ndo, "\n\t Your-IP %s", ipaddr_string(ndo, &bp->bp_yiaddr)));
340 /* Server's ip address */
341 ND_TCHECK(bp->bp_siaddr);
342 if (EXTRACT_32BITS(&bp->bp_siaddr.s_addr))
343 ND_PRINT((ndo, "\n\t Server-IP %s", ipaddr_string(ndo, &bp->bp_siaddr)));
345 /* Gateway's ip address */
346 ND_TCHECK(bp->bp_giaddr);
347 if (EXTRACT_32BITS(&bp->bp_giaddr.s_addr))
348 ND_PRINT((ndo, "\n\t Gateway-IP %s", ipaddr_string(ndo, &bp->bp_giaddr)));
350 /* Client's Ethernet address */
351 if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
352 ND_TCHECK2(bp->bp_chaddr[0], 6);
353 ND_PRINT((ndo, "\n\t Client-Ethernet-Address %s", etheraddr_string(ndo, bp->bp_chaddr)));
356 ND_TCHECK2(bp->bp_sname[0], 1); /* check first char only */
358 ND_PRINT((ndo, "\n\t sname \""));
359 if (fn_print(ndo, bp->bp_sname, ndo->ndo_snapend)) {
360 ND_PRINT((ndo, "\""));
361 ND_PRINT((ndo, "%s", tstr + 1));
364 ND_PRINT((ndo, "\""));
366 ND_TCHECK2(bp->bp_file[0], 1); /* check first char only */
368 ND_PRINT((ndo, "\n\t file \""));
369 if (fn_print(ndo, bp->bp_file, ndo->ndo_snapend)) {
370 ND_PRINT((ndo, "\""));
371 ND_PRINT((ndo, "%s", tstr + 1));
374 ND_PRINT((ndo, "\""));
377 /* Decode the vendor buffer */
378 ND_TCHECK(bp->bp_vend[0]);
379 if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
380 sizeof(uint32_t)) == 0)
381 rfc1048_print(ndo, bp->bp_vend);
382 else if (memcmp((const char *)bp->bp_vend, vm_cmu,
383 sizeof(uint32_t)) == 0)
384 cmu_print(ndo, bp->bp_vend);
388 ul = EXTRACT_32BITS(&bp->bp_vend);
390 ND_PRINT((ndo, "\n\t Vendor-#0x%x", ul));
395 ND_PRINT((ndo, "%s", tstr));
399 * The first character specifies the format to print:
400 * i - ip address (32 bits)
401 * p - ip address pairs (32 bits + 32 bits)
403 * L - unsigned long (32 bits)
404 * s - short (16 bits)
405 * b - period-seperated decimal bytes (variable length)
406 * x - colon-seperated hex bytes (variable length)
407 * a - ascii string (variable length)
408 * B - on/off (8 bits)
409 * $ - special (explicit code to handle)
411 static const struct tok tag2str[] = {
414 { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */
415 { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */
416 { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */
417 { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */
418 { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */
419 { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */
420 { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */
421 { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */
422 { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */
423 { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */
424 { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */
425 { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */
426 { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */
429 { TAG_DUMPPATH, "aDP" },
430 { TAG_DOMAINNAME, "aDomain-Name" },
431 { TAG_SWAP_SERVER, "iSS" },
432 { TAG_ROOTPATH, "aRP" },
433 { TAG_EXTPATH, "aEP" },
435 { TAG_IP_FORWARD, "BIPF" },
436 { TAG_NL_SRCRT, "BSRT" },
437 { TAG_PFILTERS, "pPF" },
438 { TAG_REASS_SIZE, "sRSZ" },
439 { TAG_DEF_TTL, "bTTL" },
440 { TAG_MTU_TIMEOUT, "lMTU-Timeout" },
441 { TAG_MTU_TABLE, "sMTU-Table" },
442 { TAG_INT_MTU, "sMTU" },
443 { TAG_LOCAL_SUBNETS, "BLSN" },
444 { TAG_BROAD_ADDR, "iBR" },
445 { TAG_DO_MASK_DISC, "BMD" },
446 { TAG_SUPPLY_MASK, "BMS" },
447 { TAG_DO_RDISC, "BRouter-Discovery" },
448 { TAG_RTR_SOL_ADDR, "iRSA" },
449 { TAG_STATIC_ROUTE, "pStatic-Route" },
450 { TAG_USE_TRAILERS, "BUT" },
451 { TAG_ARP_TIMEOUT, "lAT" },
452 { TAG_ETH_ENCAP, "BIE" },
453 { TAG_TCP_TTL, "bTT" },
454 { TAG_TCP_KEEPALIVE, "lKI" },
455 { TAG_KEEPALIVE_GO, "BKG" },
456 { TAG_NIS_DOMAIN, "aYD" },
457 { TAG_NIS_SERVERS, "iYS" },
458 { TAG_NTP_SERVERS, "iNTP" },
459 { TAG_VENDOR_OPTS, "bVendor-Option" },
460 { TAG_NETBIOS_NS, "iNetbios-Name-Server" },
461 { TAG_NETBIOS_DDS, "iWDD" },
462 { TAG_NETBIOS_NODE, "$Netbios-Node" },
463 { TAG_NETBIOS_SCOPE, "aNetbios-Scope" },
464 { TAG_XWIN_FS, "iXFS" },
465 { TAG_XWIN_DM, "iXDM" },
466 { TAG_NIS_P_DOMAIN, "sN+D" },
467 { TAG_NIS_P_SERVERS, "iN+S" },
468 { TAG_MOBILE_HOME, "iMH" },
469 { TAG_SMPT_SERVER, "iSMTP" },
470 { TAG_POP3_SERVER, "iPOP3" },
471 { TAG_NNTP_SERVER, "iNNTP" },
472 { TAG_WWW_SERVER, "iWWW" },
473 { TAG_FINGER_SERVER, "iFG" },
474 { TAG_IRC_SERVER, "iIRC" },
475 { TAG_STREETTALK_SRVR, "iSTS" },
476 { TAG_STREETTALK_STDA, "iSTDA" },
477 { TAG_REQUESTED_IP, "iRequested-IP" },
478 { TAG_IP_LEASE, "lLease-Time" },
479 { TAG_OPT_OVERLOAD, "$OO" },
480 { TAG_TFTP_SERVER, "aTFTP" },
481 { TAG_BOOTFILENAME, "aBF" },
482 { TAG_DHCP_MESSAGE, " DHCP-Message" },
483 { TAG_SERVER_ID, "iServer-ID" },
484 { TAG_PARM_REQUEST, "bParameter-Request" },
485 { TAG_MESSAGE, "aMSG" },
486 { TAG_MAX_MSG_SIZE, "sMSZ" },
487 { TAG_RENEWAL_TIME, "lRN" },
488 { TAG_REBIND_TIME, "lRB" },
489 { TAG_VENDOR_CLASS, "aVendor-Class" },
490 { TAG_CLIENT_ID, "$Client-ID" },
492 { TAG_OPEN_GROUP_UAP, "aUAP" },
494 { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
496 { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */
497 { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */
499 { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */
500 /* RFC 3004 - The User Class Option for DHCP */
501 { TAG_USER_CLASS, "$User-Class" },
503 { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
505 { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
506 { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
507 /* RFC 5859 - TFTP Server Address Option for DHCPv4 */
508 { TAG_TFTP_SERVER_ADDRESS, "iTFTP-Server-Address" },
509 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
510 { TAG_SLP_NAMING_AUTH, "aSLP-NA" },
511 { TAG_CLIENT_FQDN, "$FQDN" },
512 { TAG_AGENT_CIRCUIT, "$Agent-Information" },
513 { TAG_AGENT_REMOTE, "bARMT" },
514 { TAG_AGENT_MASK, "bAMSK" },
515 { TAG_TZ_STRING, "aTZSTR" },
516 { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */
517 { TAG_AUTH, "bAUTH" }, /* XXX 'b' */
518 { TAG_VINES_SERVERS, "iVINES" },
519 { TAG_SERVER_RANK, "sRANK" },
520 { TAG_CLIENT_ARCH, "sARCH" },
521 { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */
522 { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */
523 { TAG_LDAP_URL, "aLDAP" },
524 { TAG_6OVER4, "i6o4" },
525 { TAG_PRINTER_NAME, "aPRTR" },
526 { TAG_MDHCP_SERVER, "bMDHCP" }, /* XXX 'b' */
527 { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */
528 { TAG_NETINFO_PARENT, "iNI" },
529 { TAG_NETINFO_PARENT_TAG, "aNITAG" },
531 { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */
534 /* 2-byte extended tags */
535 static const struct tok xtag2str[] = {
539 /* DHCP "options overload" types */
540 static const struct tok oo2str[] = {
547 /* NETBIOS over TCP/IP node type options */
548 static const struct tok nbo2str[] = {
556 /* ARP Hardware types, for Client-ID option */
557 static const struct tok arp2str[] = {
563 { 0x18, "ieee1394" },
567 static const struct tok dhcp_msg_values[] = {
568 { DHCPDISCOVER, "Discover" },
569 { DHCPOFFER, "Offer" },
570 { DHCPREQUEST, "Request" },
571 { DHCPDECLINE, "Decline" },
574 { DHCPRELEASE, "Release" },
575 { DHCPINFORM, "Inform" },
579 #define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */
580 #define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */
581 #define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */
582 static const struct tok agent_suboption_values[] = {
583 { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" },
584 { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" },
585 { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
591 rfc1048_print(netdissect_options *ndo,
592 register const u_char *bp)
594 register uint16_t tag;
596 register const char *cp;
601 uint8_t uc, subopt, suboptlen;
603 ND_PRINT((ndo, "\n\t Vendor-rfc1048 Extensions"));
605 /* Step over magic cookie */
606 ND_PRINT((ndo, "\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp)));
607 bp += sizeof(int32_t);
609 /* Loop while we there is a tag left in the buffer */
610 while (ND_TTEST2(*bp, 1)) {
612 if (tag == TAG_PAD && ndo->ndo_vflag < 3)
614 if (tag == TAG_END && ndo->ndo_vflag < 3)
616 if (tag == TAG_EXTENDED_OPTION) {
617 ND_TCHECK2(*(bp + 1), 2);
618 tag = EXTRACT_16BITS(bp + 1);
619 /* XXX we don't know yet if the IANA will
620 * preclude overlap of 1-byte and 2-byte spaces.
621 * If not, we need to offset tag after this step.
623 cp = tok2str(xtag2str, "?xT%u", tag);
625 cp = tok2str(tag2str, "?T%u", tag);
628 if (tag == TAG_PAD || tag == TAG_END)
631 /* Get the length; check for truncation */
636 ND_PRINT((ndo, "\n\t %s Option %u, length %u%s", cp, tag, len,
637 len > 0 ? ": " : ""));
639 if (tag == TAG_PAD && ndo->ndo_vflag > 2) {
641 while (ND_TTEST2(*bp, 1) && *bp == TAG_PAD) {
646 ND_PRINT((ndo, ", occurs %u", ntag));
649 if (!ND_TTEST2(*bp, len)) {
650 ND_PRINT((ndo, "[|rfc1048 %u]", len));
654 if (tag == TAG_DHCP_MESSAGE && len == 1) {
656 ND_PRINT((ndo, "%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc)));
660 if (tag == TAG_PARM_REQUEST) {
664 cp = tok2str(tag2str, "?Option %u", uc);
666 ND_PRINT((ndo, "\n\t "));
668 ND_PRINT((ndo, ", "));
669 ND_PRINT((ndo, "%s", cp + 1));
675 if (tag == TAG_EXTENDED_REQUEST) {
679 us = EXTRACT_16BITS(bp);
681 cp = tok2str(xtag2str, "?xT%u", us);
683 ND_PRINT((ndo, "+"));
684 ND_PRINT((ndo, "%s", cp + 1));
692 /* Base default formats for unknown tags on data size */
705 ND_PRINT((ndo, "\""));
706 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
707 ND_PRINT((ndo, "\""));
710 ND_PRINT((ndo, "\""));
718 /* ip addresses/32-bit words */
719 while (len >= sizeof(ul)) {
721 ND_PRINT((ndo, ","));
722 ul = EXTRACT_32BITS(bp);
725 ND_PRINT((ndo, "%s", ipaddr_string(ndo, &ul)));
727 ND_PRINT((ndo, "%d", ul));
729 ND_PRINT((ndo, "%u", ul));
737 /* IP address pairs */
738 while (len >= 2*sizeof(ul)) {
740 ND_PRINT((ndo, ","));
741 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
742 ND_PRINT((ndo, "(%s:", ipaddr_string(ndo, &ul)));
744 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
745 ND_PRINT((ndo, "%s)", ipaddr_string(ndo, &ul)));
754 while (len >= sizeof(us)) {
756 ND_PRINT((ndo, ","));
757 us = EXTRACT_16BITS(bp);
758 ND_PRINT((ndo, "%u", us));
769 ND_PRINT((ndo, ","));
772 ND_PRINT((ndo, "N"));
775 ND_PRINT((ndo, "Y"));
778 ND_PRINT((ndo, "%u?", *bp));
793 ND_PRINT((ndo, c == 'x' ? ":" : "."));
795 ND_PRINT((ndo, "%02x", *bp));
797 ND_PRINT((ndo, "%u", *bp));
805 /* Guys we can't handle with one of the usual cases */
808 case TAG_NETBIOS_NODE:
809 /* this option should be at least 1 byte long */
811 ND_PRINT((ndo, "ERROR: length < 1 bytes"));
816 ND_PRINT((ndo, "%s", tok2str(nbo2str, NULL, tag)));
819 case TAG_OPT_OVERLOAD:
820 /* this option should be at least 1 byte long */
822 ND_PRINT((ndo, "ERROR: length < 1 bytes"));
827 ND_PRINT((ndo, "%s", tok2str(oo2str, NULL, tag)));
830 case TAG_CLIENT_FQDN:
831 /* this option should be at least 3 bytes long */
833 ND_PRINT((ndo, "ERROR: length < 3 bytes"));
839 ND_PRINT((ndo, "[%s] ", client_fqdn_flags(*bp)));
842 ND_PRINT((ndo, "%u/%u ", *bp, *(bp+1)));
844 ND_PRINT((ndo, "\""));
845 if (fn_printn(ndo, bp, len - 3, ndo->ndo_snapend)) {
846 ND_PRINT((ndo, "\""));
849 ND_PRINT((ndo, "\""));
858 /* this option should be at least 1 byte long */
860 ND_PRINT((ndo, "ERROR: length < 1 bytes"));
866 ND_PRINT((ndo, "\""));
867 if (fn_printn(ndo, bp, len, ndo->ndo_snapend)) {
868 ND_PRINT((ndo, "\""));
871 ND_PRINT((ndo, "\""));
876 ND_PRINT((ndo, "%s ", tok2str(arp2str, "hardware-type %u,", type)));
879 ND_PRINT((ndo, ":"));
880 ND_PRINT((ndo, "%02x", *bp));
889 case TAG_AGENT_CIRCUIT:
894 if (suboptlen > len) {
895 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: length goes past end of option",
896 tok2str(agent_suboption_values, "Unknown", subopt),
903 ND_PRINT((ndo, "\n\t %s SubOption %u, length %u: ",
904 tok2str(agent_suboption_values, "Unknown", subopt),
909 case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
910 case AGENT_SUBOPTION_REMOTE_ID:
911 case AGENT_SUBOPTION_SUBSCRIBER_ID:
912 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend))
917 print_unknown_data(ndo, bp, "\n\t\t", suboptlen);
925 case TAG_CLASSLESS_STATIC_RT:
926 case TAG_CLASSLESS_STA_RT_MS:
928 u_int mask_width, significant_octets, i;
930 /* this option should be at least 5 bytes long */
932 ND_PRINT((ndo, "ERROR: length < 5 bytes"));
939 ND_PRINT((ndo, ","));
942 /* mask_width <= 32 */
943 if (mask_width > 32) {
944 ND_PRINT((ndo, "[ERROR: Mask width (%d) > 32]", mask_width));
949 significant_octets = (mask_width + 7) / 8;
950 /* significant octets + router(4) */
951 if (len < significant_octets + 4) {
952 ND_PRINT((ndo, "[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4));
957 ND_PRINT((ndo, "("));
959 ND_PRINT((ndo, "default"));
961 for (i = 0; i < significant_octets ; i++) {
963 ND_PRINT((ndo, "."));
964 ND_PRINT((ndo, "%d", *bp++));
966 for (i = significant_octets ; i < 4 ; i++)
967 ND_PRINT((ndo, ".0"));
968 ND_PRINT((ndo, "/%d", mask_width));
970 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
971 ND_PRINT((ndo, ":%s)", ipaddr_string(ndo, &ul)));
973 len -= (significant_octets + 4);
981 u_int suboptnumber = 1;
985 ND_PRINT((ndo, "ERROR: length < 2 bytes"));
993 ND_PRINT((ndo, "\n\t "));
994 ND_PRINT((ndo, "instance#%u: ", suboptnumber));
995 if (suboptlen == 0) {
996 ND_PRINT((ndo, "ERROR: suboption length must be non-zero"));
1001 if (len < suboptlen) {
1002 ND_PRINT((ndo, "ERROR: malformed option"));
1007 ND_PRINT((ndo, "\""));
1008 if (fn_printn(ndo, bp, suboptlen, ndo->ndo_snapend)) {
1009 ND_PRINT((ndo, "\""));
1012 ND_PRINT((ndo, "\""));
1013 ND_PRINT((ndo, ", length %d", suboptlen));
1022 ND_PRINT((ndo, "[unknown special tag %u, size %u]",
1030 /* Data left over? */
1032 ND_PRINT((ndo, "\n\t trailing data length %u", len));
1038 ND_PRINT((ndo, "|[rfc1048]"));
1042 cmu_print(netdissect_options *ndo,
1043 register const u_char *bp)
1045 register const struct cmu_vend *cmu;
1047 #define PRINTCMUADDR(m, s) { ND_TCHECK(cmu->m); \
1048 if (cmu->m.s_addr != 0) \
1049 ND_PRINT((ndo, " %s:%s", s, ipaddr_string(ndo, &cmu->m.s_addr))); }
1051 ND_PRINT((ndo, " vend-cmu"));
1052 cmu = (const struct cmu_vend *)bp;
1054 /* Only print if there are unknown bits */
1055 ND_TCHECK(cmu->v_flags);
1056 if ((cmu->v_flags & ~(VF_SMASK)) != 0)
1057 ND_PRINT((ndo, " F:0x%x", cmu->v_flags));
1058 PRINTCMUADDR(v_dgate, "DG");
1059 PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
1060 PRINTCMUADDR(v_dns1, "NS1");
1061 PRINTCMUADDR(v_dns2, "NS2");
1062 PRINTCMUADDR(v_ins1, "IEN1");
1063 PRINTCMUADDR(v_ins2, "IEN2");
1064 PRINTCMUADDR(v_ts1, "TS1");
1065 PRINTCMUADDR(v_ts2, "TS2");
1069 ND_PRINT((ndo, "%s", tstr));
1074 client_fqdn_flags(u_int flags)
1076 static char buf[8+1];
1079 if (flags & CLIENT_FQDN_FLAGS_S)
1081 if (flags & CLIENT_FQDN_FLAGS_O)
1083 if (flags & CLIENT_FQDN_FLAGS_E)
1085 if (flags & CLIENT_FQDN_FLAGS_N)