Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-cip.c
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c8cf0f94
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1/*
2 * Marko Kiiskila carnil@cs.tut.fi
3 *
4 * Tampere University of Technology - Telecommunications Laboratory
5 *
6 * Permission to use, copy, modify and distribute this
7 * software and its documentation is hereby granted,
8 * provided that both the copyright notice and this
9 * permission notice appear in all copies of the software,
10 * derivative works or modified versions, and any portions
11 * thereof, that both notices appear in supporting
12 * documentation, and that the use of this software is
13 * acknowledged in any publications resulting from using
14 * the software.
15 *
16 * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
17 * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR
18 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS
19 * SOFTWARE.
20 *
21 */
22
23#ifndef lint
24static const char rcsid[] _U_ =
25 "@(#) $Header: /tcpdump/master/tcpdump/print-cip.c,v 1.25.2.1 2005/07/07 01:24:34 guy Exp $ (LBL)";
26#endif
27
28#ifdef HAVE_CONFIG_H
29#include "config.h"
30#endif
31
32#include <string.h>
33
34#include <tcpdump-stdinc.h>
35
36#include <stdio.h>
37#include <pcap.h>
38
39#include "interface.h"
40#include "addrtoname.h"
41#include "ethertype.h"
42#include "ether.h"
43
44#define RFC1483LLC_LEN 8
45
46static unsigned char rfcllc[] = {
47 0xaa, /* DSAP: non-ISO */
48 0xaa, /* SSAP: non-ISO */
49 0x03, /* Ctrl: Unnumbered Information Command PDU */
50 0x00, /* OUI: EtherType */
51 0x00,
52 0x00 };
53
54static inline void
55cip_print(int length)
56{
57 /*
58 * There is no MAC-layer header, so just print the length.
59 */
60 printf("%d: ", length);
61}
62
63/*
64 * This is the top level routine of the printer. 'p' points
65 * to the LLC/SNAP or raw header of the packet, 'h->ts' is the timestamp,
66 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
67 * is the number of bytes actually captured.
68 */
69u_int
70cip_if_print(const struct pcap_pkthdr *h, const u_char *p)
71{
72 u_int caplen = h->caplen;
73 u_int length = h->len;
74 u_short extracted_ethertype;
75
76 if (memcmp(rfcllc, p, sizeof(rfcllc))==0 && caplen < RFC1483LLC_LEN) {
77 printf("[|cip]");
78 return (0);
79 }
80
81 if (eflag)
82 cip_print(length);
83
84 if (memcmp(rfcllc, p, sizeof(rfcllc)) == 0) {
85 /*
86 * LLC header is present. Try to print it & higher layers.
87 */
88 if (llc_print(p, length, caplen, NULL, NULL,
89 &extracted_ethertype) == 0) {
90 /* ether_type not known, print raw packet */
91 if (!eflag)
92 cip_print(length);
93 if (extracted_ethertype) {
94 printf("(LLC %s) ",
95 etherproto_string(htons(extracted_ethertype)));
96 }
97 if (!suppress_default_print)
98 default_print(p, caplen);
99 }
100 } else {
101 /*
102 * LLC header is absent; treat it as just IP.
103 */
104 ip_print(gndo, p, length);
105 }
106
107 return (0);
108}
109
110
111/*
112 * Local Variables:
113 * c-style: whitesmith
114 * c-basic-offset: 8
115 * End:
116 */