| blob | b442c18388a75e479102eee426a0e1d1baa566c3 |
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 #ifndef lint
25 "@(#) $Header: /tcpdump/master/tcpdump/print-bootp.c,v 1.88 2007-09-20 15:04:45 hannes Exp $ (LBL)";
26 #endif
28 #ifdef HAVE_CONFIG_H
30 #endif
32 #include <tcpdump-stdinc.h>
34 #include <stdio.h>
35 #include <string.h>
52 };
58 };
60 /*
61 * Print bootp requests
62 */
63 void
65 {
79 }
88 /* The usual hardware address type is 1 (10Mb Ethernet) */
92 /* The usual length for 10Mb Ethernet address is 6 bytes */
96 /* Only print interesting fields */
109 /* Client's ip address */
114 /* 'your' ip address (bootp client) */
119 /* Server's ip address */
124 /* Gateway's ip address */
129 /* Client's Ethernet address */
133 }
142 }
144 }
152 }
154 }
156 /* Decode the vendor buffer */
165 u_int32_t ul;
170 }
173 trunc:
175 }
177 /*
178 * The first character specifies the format to print:
179 * i - ip address (32 bits)
180 * p - ip address pairs (32 bits + 32 bits)
181 * l - long (32 bits)
182 * L - unsigned long (32 bits)
183 * s - short (16 bits)
184 * b - period-seperated decimal bytes (variable length)
185 * x - colon-seperated hex bytes (variable length)
186 * a - ascii string (variable length)
187 * B - on/off (8 bits)
188 * $ - special (explicit code to handle)
189 */
191 /* RFC1048 tags */
207 /* RFC1497 tags */
213 /* RFC2132 tags */
270 /* RFC 2485 */
272 /* RFC 2563 */
274 /* RFC 2610 */
277 /* RFC 2937 */
279 /* RFC 3011 */
281 /* RFC 3442 */
284 /* http://www.iana.org/assignments/bootp-dhcp-extensions/index.htm */
309 };
310 /* 2-byte extended tags */
313 };
315 /* DHCP "options overload" types */
321 };
323 /* NETBIOS over TCP/IP node type options */
330 };
332 /* ARP Hardware types, for Client-ID option */
341 };
353 };
363 };
366 static void
368 {
374 u_int32_t ul;
375 u_int16_t us;
380 /* Step over magic cookie */
384 /* Loop while we there is a tag left in the buffer */
394 /* XXX we don't know yet if the IANA will
395 * preclude overlap of 1-byte and 2-byte spaces.
396 * If not, we need to offset tag after this step.
397 */
406 /* Get the length; check for truncation */
409 }
417 bp++;
418 ntag++;
419 }
422 }
427 }
433 }
442 else
445 idx++;
446 }
448 }
461 }
463 }
465 /* Print data */
467 /* Base default formats for unknown tags on data size */
472 else
474 }
479 /* ascii strings */
484 }
493 /* ip addresses/32-bit words */
503 else
508 }
512 /* IP address pairs */
524 }
528 /* shorts */
537 }
541 /* boolean */
555 }
559 }
565 /* Bytes */
571 else
576 }
580 /* Guys we can't handle with one of the usual cases */
584 /* this option should be at least 1 byte long */
591 }
598 /* this option should be at least 1 byte long */
605 }
612 /* this option should be at least 3 bytes long */
619 }
622 bp++;
630 }
639 /* this option should be at least 1 byte long */
646 }
648 len--;
654 }
668 }
669 }
671 }
681 subopt,
682 suboptlen);
686 }
689 subopt,
690 suboptlen);
701 }
705 }
710 {
713 /* this option should be at least 5 bytes long */
720 }
725 len--;
726 /* mask_width <= 32 */
732 }
734 /* significant octets + router(4) */
740 }
749 }
753 }
759 }
760 }
769 }
771 }
772 /* Data left over? */
776 }
777 }
779 trunc:
781 }
783 static void
785 {
788 #define PRINTCMUADDR(m, s) { TCHECK(cmu->m); \
789 if (cmu->m.s_addr != 0) \
795 /* Only print if there are unknown bits */
809 trunc:
811 #undef PRINTCMUADDR
812 }
816 {
831 }