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 static const char rcsid[] _U_ =
27 "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.89 2008-04-22 09:45:08 hannes Exp $ (LBL)";
34 #include <tcpdump-stdinc.h>
39 #include "interface.h"
40 #include "addrtoname.h"
45 static void rfc1048_print(const u_char *);
46 static void cmu_print(const u_char *);
47 static char *client_fqdn_flags(u_int flags);
49 static char tstr[] = " [|bootp]";
51 static const struct tok bootp_flag_values[] = {
52 { 0x8000, "Broadcast" },
56 static const struct tok bootp_op_values[] = {
57 { BOOTPREQUEST, "Request" },
58 { BOOTPREPLY, "Reply" },
63 * Print bootp requests
66 bootp_print(register const u_char *cp, u_int length)
68 register const struct bootp *bp;
69 static const u_char vm_cmu[4] = VM_CMU;
70 static const u_char vm_rfc1048[4] = VM_RFC1048;
72 bp = (const struct bootp *)cp;
75 printf("BOOTP/DHCP, %s",
76 tok2str(bootp_op_values, "unknown (0x%02x)", bp->bp_op));
78 if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
79 TCHECK2(bp->bp_chaddr[0], 6);
80 printf(" from %s", etheraddr_string(bp->bp_chaddr));
83 printf(", length %u", length);
90 /* The usual hardware address type is 1 (10Mb Ethernet) */
91 if (bp->bp_htype != 1)
92 printf(", htype %d", bp->bp_htype);
94 /* The usual length for 10Mb Ethernet address is 6 bytes */
95 if (bp->bp_htype != 1 || bp->bp_hlen != 6)
96 printf(", hlen %d", bp->bp_hlen);
98 /* Only print interesting fields */
100 printf(", hops %d", bp->bp_hops);
102 printf(", xid 0x%x", EXTRACT_32BITS(&bp->bp_xid));
104 printf(", secs %d", EXTRACT_16BITS(&bp->bp_secs));
106 printf(", Flags [%s]",
107 bittok2str(bootp_flag_values, "none", EXTRACT_16BITS(&bp->bp_flags)));
109 printf(" (0x%04x)", EXTRACT_16BITS(&bp->bp_flags));
111 /* Client's ip address */
112 TCHECK(bp->bp_ciaddr);
113 if (bp->bp_ciaddr.s_addr)
114 printf("\n\t Client-IP %s", ipaddr_string(&bp->bp_ciaddr));
116 /* 'your' ip address (bootp client) */
117 TCHECK(bp->bp_yiaddr);
118 if (bp->bp_yiaddr.s_addr)
119 printf("\n\t Your-IP %s", ipaddr_string(&bp->bp_yiaddr));
121 /* Server's ip address */
122 TCHECK(bp->bp_siaddr);
123 if (bp->bp_siaddr.s_addr)
124 printf("\n\t Server-IP %s", ipaddr_string(&bp->bp_siaddr));
126 /* Gateway's ip address */
127 TCHECK(bp->bp_giaddr);
128 if (bp->bp_giaddr.s_addr)
129 printf("\n\t Gateway-IP %s", ipaddr_string(&bp->bp_giaddr));
131 /* Client's Ethernet address */
132 if (bp->bp_htype == 1 && bp->bp_hlen == 6) {
133 TCHECK2(bp->bp_chaddr[0], 6);
134 printf("\n\t Client-Ethernet-Address %s", etheraddr_string(bp->bp_chaddr));
137 TCHECK2(bp->bp_sname[0], 1); /* check first char only */
139 printf("\n\t sname \"");
140 if (fn_print(bp->bp_sname, snapend)) {
142 fputs(tstr + 1, stdout);
147 TCHECK2(bp->bp_file[0], 1); /* check first char only */
149 printf("\n\t file \"");
150 if (fn_print(bp->bp_file, snapend)) {
152 fputs(tstr + 1, stdout);
158 /* Decode the vendor buffer */
159 TCHECK(bp->bp_vend[0]);
160 if (memcmp((const char *)bp->bp_vend, vm_rfc1048,
161 sizeof(u_int32_t)) == 0)
162 rfc1048_print(bp->bp_vend);
163 else if (memcmp((const char *)bp->bp_vend, vm_cmu,
164 sizeof(u_int32_t)) == 0)
165 cmu_print(bp->bp_vend);
169 ul = EXTRACT_32BITS(&bp->bp_vend);
171 printf("\n\t Vendor-#0x%x", ul);
180 * The first character specifies the format to print:
181 * i - ip address (32 bits)
182 * p - ip address pairs (32 bits + 32 bits)
184 * L - unsigned long (32 bits)
185 * s - short (16 bits)
186 * b - period-seperated decimal bytes (variable length)
187 * x - colon-seperated hex bytes (variable length)
188 * a - ascii string (variable length)
189 * B - on/off (8 bits)
190 * $ - special (explicit code to handle)
192 static struct tok tag2str[] = {
195 { TAG_SUBNET_MASK, "iSubnet-Mask" }, /* subnet mask (RFC950) */
196 { TAG_TIME_OFFSET, "LTime-Zone" }, /* seconds from UTC */
197 { TAG_GATEWAY, "iDefault-Gateway" }, /* default gateway */
198 { TAG_TIME_SERVER, "iTime-Server" }, /* time servers (RFC868) */
199 { TAG_NAME_SERVER, "iIEN-Name-Server" }, /* IEN name servers (IEN116) */
200 { TAG_DOMAIN_SERVER, "iDomain-Name-Server" }, /* domain name (RFC1035) */
201 { TAG_LOG_SERVER, "iLOG" }, /* MIT log servers */
202 { TAG_COOKIE_SERVER, "iCS" }, /* cookie servers (RFC865) */
203 { TAG_LPR_SERVER, "iLPR-Server" }, /* lpr server (RFC1179) */
204 { TAG_IMPRESS_SERVER, "iIM" }, /* impress servers (Imagen) */
205 { TAG_RLP_SERVER, "iRL" }, /* resource location (RFC887) */
206 { TAG_HOSTNAME, "aHostname" }, /* ascii hostname */
207 { TAG_BOOTSIZE, "sBS" }, /* 512 byte blocks */
210 { TAG_DUMPPATH, "aDP" },
211 { TAG_DOMAINNAME, "aDomain-Name" },
212 { TAG_SWAP_SERVER, "iSS" },
213 { TAG_ROOTPATH, "aRP" },
214 { TAG_EXTPATH, "aEP" },
216 { TAG_IP_FORWARD, "BIPF" },
217 { TAG_NL_SRCRT, "BSRT" },
218 { TAG_PFILTERS, "pPF" },
219 { TAG_REASS_SIZE, "sRSZ" },
220 { TAG_DEF_TTL, "bTTL" },
221 { TAG_MTU_TIMEOUT, "lMTU-Timeout" },
222 { TAG_MTU_TABLE, "sMTU-Table" },
223 { TAG_INT_MTU, "sMTU" },
224 { TAG_LOCAL_SUBNETS, "BLSN" },
225 { TAG_BROAD_ADDR, "iBR" },
226 { TAG_DO_MASK_DISC, "BMD" },
227 { TAG_SUPPLY_MASK, "BMS" },
228 { TAG_DO_RDISC, "BRouter-Discovery" },
229 { TAG_RTR_SOL_ADDR, "iRSA" },
230 { TAG_STATIC_ROUTE, "pStatic-Route" },
231 { TAG_USE_TRAILERS, "BUT" },
232 { TAG_ARP_TIMEOUT, "lAT" },
233 { TAG_ETH_ENCAP, "BIE" },
234 { TAG_TCP_TTL, "bTT" },
235 { TAG_TCP_KEEPALIVE, "lKI" },
236 { TAG_KEEPALIVE_GO, "BKG" },
237 { TAG_NIS_DOMAIN, "aYD" },
238 { TAG_NIS_SERVERS, "iYS" },
239 { TAG_NTP_SERVERS, "iNTP" },
240 { TAG_VENDOR_OPTS, "bVendor-Option" },
241 { TAG_NETBIOS_NS, "iNetbios-Name-Server" },
242 { TAG_NETBIOS_DDS, "iWDD" },
243 { TAG_NETBIOS_NODE, "$Netbios-Node" },
244 { TAG_NETBIOS_SCOPE, "aNetbios-Scope" },
245 { TAG_XWIN_FS, "iXFS" },
246 { TAG_XWIN_DM, "iXDM" },
247 { TAG_NIS_P_DOMAIN, "sN+D" },
248 { TAG_NIS_P_SERVERS, "iN+S" },
249 { TAG_MOBILE_HOME, "iMH" },
250 { TAG_SMPT_SERVER, "iSMTP" },
251 { TAG_POP3_SERVER, "iPOP3" },
252 { TAG_NNTP_SERVER, "iNNTP" },
253 { TAG_WWW_SERVER, "iWWW" },
254 { TAG_FINGER_SERVER, "iFG" },
255 { TAG_IRC_SERVER, "iIRC" },
256 { TAG_STREETTALK_SRVR, "iSTS" },
257 { TAG_STREETTALK_STDA, "iSTDA" },
258 { TAG_REQUESTED_IP, "iRequested-IP" },
259 { TAG_IP_LEASE, "lLease-Time" },
260 { TAG_OPT_OVERLOAD, "$OO" },
261 { TAG_TFTP_SERVER, "aTFTP" },
262 { TAG_BOOTFILENAME, "aBF" },
263 { TAG_DHCP_MESSAGE, " DHCP-Message" },
264 { TAG_SERVER_ID, "iServer-ID" },
265 { TAG_PARM_REQUEST, "bParameter-Request" },
266 { TAG_MESSAGE, "aMSG" },
267 { TAG_MAX_MSG_SIZE, "sMSZ" },
268 { TAG_RENEWAL_TIME, "lRN" },
269 { TAG_REBIND_TIME, "lRB" },
270 { TAG_VENDOR_CLASS, "aVendor-Class" },
271 { TAG_CLIENT_ID, "$Client-ID" },
273 { TAG_OPEN_GROUP_UAP, "aUAP" },
275 { TAG_DISABLE_AUTOCONF, "BNOAUTO" },
277 { TAG_SLP_DA, "bSLP-DA" }, /*"b" is a little wrong */
278 { TAG_SLP_SCOPE, "bSLP-SCOPE" }, /*"b" is a little wrong */
280 { TAG_NS_SEARCH, "sNSSEARCH" }, /* XXX 's' */
282 { TAG_IP4_SUBNET_SELECT, "iSUBNET" },
284 { TAG_CLASSLESS_STATIC_RT, "$Classless-Static-Route" },
285 { TAG_CLASSLESS_STA_RT_MS, "$Classless-Static-Route-Microsoft" },
286 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
287 { TAG_USER_CLASS, "aCLASS" },
288 { TAG_SLP_NAMING_AUTH, "aSLP-NA" },
289 { TAG_CLIENT_FQDN, "$FQDN" },
290 { TAG_AGENT_CIRCUIT, "$Agent-Information" },
291 { TAG_AGENT_REMOTE, "bARMT" },
292 { TAG_AGENT_MASK, "bAMSK" },
293 { TAG_TZ_STRING, "aTZSTR" },
294 { TAG_FQDN_OPTION, "bFQDNS" }, /* XXX 'b' */
295 { TAG_AUTH, "bAUTH" }, /* XXX 'b' */
296 { TAG_VINES_SERVERS, "iVINES" },
297 { TAG_SERVER_RANK, "sRANK" },
298 { TAG_CLIENT_ARCH, "sARCH" },
299 { TAG_CLIENT_NDI, "bNDI" }, /* XXX 'b' */
300 { TAG_CLIENT_GUID, "bGUID" }, /* XXX 'b' */
301 { TAG_LDAP_URL, "aLDAP" },
302 { TAG_6OVER4, "i6o4" },
303 { TAG_PRINTER_NAME, "aPRTR" },
304 { TAG_MDHCP_SERVER, "bMDHCP" }, /* XXX 'b' */
305 { TAG_IPX_COMPAT, "bIPX" }, /* XXX 'b' */
306 { TAG_NETINFO_PARENT, "iNI" },
307 { TAG_NETINFO_PARENT_TAG, "aNITAG" },
309 { TAG_FAILOVER, "bFAIL" }, /* XXX 'b' */
312 /* 2-byte extended tags */
313 static struct tok xtag2str[] = {
317 /* DHCP "options overload" types */
318 static struct tok oo2str[] = {
325 /* NETBIOS over TCP/IP node type options */
326 static struct tok nbo2str[] = {
334 /* ARP Hardware types, for Client-ID option */
335 static struct tok arp2str[] = {
341 { 0x18, "ieee1394" },
345 static struct tok dhcp_msg_values[] = {
346 { DHCPDISCOVER, "Discover" },
347 { DHCPOFFER, "Offer" },
348 { DHCPREQUEST, "Request" },
349 { DHCPDECLINE, "Decline" },
352 { DHCPRELEASE, "Release" },
353 { DHCPINFORM, "Inform" },
357 #define AGENT_SUBOPTION_CIRCUIT_ID 1 /* RFC 3046 */
358 #define AGENT_SUBOPTION_REMOTE_ID 2 /* RFC 3046 */
359 #define AGENT_SUBOPTION_SUBSCRIBER_ID 6 /* RFC 3993 */
360 static struct tok agent_suboption_values[] = {
361 { AGENT_SUBOPTION_CIRCUIT_ID, "Circuit-ID" },
362 { AGENT_SUBOPTION_REMOTE_ID, "Remote-ID" },
363 { AGENT_SUBOPTION_SUBSCRIBER_ID, "Subscriber-ID" },
369 rfc1048_print(register const u_char *bp)
371 register u_int16_t tag;
373 register const char *cp;
378 u_int8_t uc, subopt, suboptlen;
380 printf("\n\t Vendor-rfc1048 Extensions");
382 /* Step over magic cookie */
383 printf("\n\t Magic Cookie 0x%08x", EXTRACT_32BITS(bp));
384 bp += sizeof(int32_t);
386 /* Loop while we there is a tag left in the buffer */
387 while (TTEST2(*bp, 1)) {
389 if (tag == TAG_PAD && vflag < 3)
391 if (tag == TAG_END && vflag < 3)
393 if (tag == TAG_EXTENDED_OPTION) {
394 TCHECK2(*(bp + 1), 2);
395 tag = EXTRACT_16BITS(bp + 1);
396 /* XXX we don't know yet if the IANA will
397 * preclude overlap of 1-byte and 2-byte spaces.
398 * If not, we need to offset tag after this step.
400 cp = tok2str(xtag2str, "?xT%u", tag);
402 cp = tok2str(tag2str, "?T%u", tag);
405 if (tag == TAG_PAD || tag == TAG_END)
408 /* Get the length; check for truncation */
413 printf("\n\t %s Option %u, length %u%s", cp, tag, len,
414 len > 0 ? ": " : "");
416 if (tag == TAG_PAD && vflag > 2) {
418 while (TTEST2(*bp, 1) && *bp == TAG_PAD) {
423 printf(", occurs %u", ntag);
426 if (!TTEST2(*bp, len)) {
427 printf("[|rfc1048 %u]", len);
431 if (tag == TAG_DHCP_MESSAGE && len == 1) {
433 printf("%s", tok2str(dhcp_msg_values, "Unknown (%u)", uc));
437 if (tag == TAG_PARM_REQUEST) {
441 cp = tok2str(tag2str, "?Option %u", uc);
446 printf("%s", cp + 1);
452 if (tag == TAG_EXTENDED_REQUEST) {
456 us = EXTRACT_16BITS(bp);
458 cp = tok2str(xtag2str, "?xT%u", us);
461 printf("%s", cp + 1);
469 /* Base default formats for unknown tags on data size */
483 if (fn_printn(bp, len, snapend)) {
495 /* ip addresses/32-bit words */
496 while (len >= sizeof(ul)) {
499 ul = EXTRACT_32BITS(bp);
502 printf("%s", ipaddr_string(&ul));
514 /* IP address pairs */
515 while (len >= 2*sizeof(ul)) {
518 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
519 printf("(%s:", ipaddr_string(&ul));
521 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
522 printf("%s)", ipaddr_string(&ul));
531 while (len >= sizeof(us)) {
534 us = EXTRACT_16BITS(bp);
570 putchar(c == 'x' ? ':' : '.');
582 /* Guys we can't handle with one of the usual cases */
585 case TAG_NETBIOS_NODE:
586 /* this option should be at least 1 byte long */
588 printf("ERROR: option %u len %u < 1 bytes",
589 TAG_NETBIOS_NODE, len);
594 fputs(tok2str(nbo2str, NULL, tag), stdout);
597 case TAG_OPT_OVERLOAD:
598 /* this option should be at least 1 byte long */
600 printf("ERROR: option %u len %u < 1 bytes",
601 TAG_OPT_OVERLOAD, len);
606 fputs(tok2str(oo2str, NULL, tag), stdout);
609 case TAG_CLIENT_FQDN:
610 /* this option should be at least 3 bytes long */
612 printf("ERROR: option %u len %u < 3 bytes",
613 TAG_CLIENT_FQDN, len);
619 printf("[%s] ", client_fqdn_flags(*bp));
622 printf("%u/%u ", *bp, *(bp+1));
625 if (fn_printn(bp, len - 3, snapend)) {
637 /* this option should be at least 1 byte long */
639 printf("ERROR: option %u len %u < 1 bytes",
647 if (fn_printn(bp, len, snapend)) {
656 printf("%s ", tok2str(arp2str, "hardware-type %u,", type));
669 case TAG_AGENT_CIRCUIT:
674 if (suboptlen > len) {
675 printf("\n\t %s SubOption %u, length %u: length goes past end of option",
676 tok2str(agent_suboption_values, "Unknown", subopt),
683 printf("\n\t %s SubOption %u, length %u: ",
684 tok2str(agent_suboption_values, "Unknown", subopt),
689 case AGENT_SUBOPTION_CIRCUIT_ID: /* fall through */
690 case AGENT_SUBOPTION_REMOTE_ID:
691 case AGENT_SUBOPTION_SUBSCRIBER_ID:
692 fn_printn(bp, suboptlen, NULL);
696 print_unknown_data(bp, "\n\t\t", suboptlen);
704 case TAG_CLASSLESS_STATIC_RT:
705 case TAG_CLASSLESS_STA_RT_MS:
707 u_int mask_width, significant_octets, i;
709 /* this option should be at least 5 bytes long */
711 printf("ERROR: option %u len %u < 5 bytes",
712 TAG_CLASSLESS_STATIC_RT, len);
722 /* mask_width <= 32 */
723 if (mask_width > 32) {
724 printf("[ERROR: Mask width (%d) > 32]", mask_width);
729 significant_octets = (mask_width + 7) / 8;
730 /* significant octets + router(4) */
731 if (len < significant_octets + 4) {
732 printf("[ERROR: Remaining length (%u) < %u bytes]", len, significant_octets + 4);
741 for (i = 0; i < significant_octets ; i++) {
746 for (i = significant_octets ; i < 4 ; i++)
748 printf("/%d", mask_width);
750 memcpy((char *)&ul, (const char *)bp, sizeof(ul));
751 printf(":%s)", ipaddr_string(&ul));
753 len -= (significant_octets + 4);
760 printf("[unknown special tag %u, size %u]",
768 /* Data left over? */
770 printf("\n\t trailing data length %u", len);
776 printf("|[rfc1048]");
780 cmu_print(register const u_char *bp)
782 register const struct cmu_vend *cmu;
784 #define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
785 if (cmu->m.s_addr != 0) \
786 printf(" %s:%s", s, ipaddr_string(&cmu->m.s_addr)); }
789 cmu = (const struct cmu_vend *)bp;
791 /* Only print if there are unknown bits */
792 TCHECK(cmu->v_flags);
793 if ((cmu->v_flags & ~(VF_SMASK)) != 0)
794 printf(" F:0x%x", cmu->v_flags);
795 PRINTCMUADDR(v_dgate, "DG");
796 PRINTCMUADDR(v_smask, cmu->v_flags & VF_SMASK ? "SM" : "SM*");
797 PRINTCMUADDR(v_dns1, "NS1");
798 PRINTCMUADDR(v_dns2, "NS2");
799 PRINTCMUADDR(v_ins1, "IEN1");
800 PRINTCMUADDR(v_ins2, "IEN2");
801 PRINTCMUADDR(v_ts1, "TS1");
802 PRINTCMUADDR(v_ts2, "TS2");
811 client_fqdn_flags(u_int flags)
813 static char buf[8+1];
816 if (flags & CLIENT_FQDN_FLAGS_S)
818 if (flags & CLIENT_FQDN_FLAGS_O)
820 if (flags & CLIENT_FQDN_FLAGS_E)
822 if (flags & CLIENT_FQDN_FLAGS_N)