1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
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 #ifndef lint
22 static const char rcsid[] _U_ =
23 "@(#) $Header: /tcpdump/master/tcpdump/print-ap1394.c,v 1.5 2006-02-11 22:12:06 hannes Exp $ (LBL)";
24 #endif
25
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include <tcpdump-stdinc.h>
31
32 #include <stdio.h>
33 #include <pcap.h>
34
35 #include "interface.h"
36 #include "extract.h"
37 #include "addrtoname.h"
38 #include "ethertype.h"
39
40 /*
41 * Structure of a header for Apple's IP-over-IEEE 1384 BPF header.
42 */
43 #define FIREWIRE_EUI64_LEN 8
44 struct firewire_header {
45 u_char firewire_dhost[FIREWIRE_EUI64_LEN];
46 u_char firewire_shost[FIREWIRE_EUI64_LEN];
47 u_short firewire_type;
48 };
49
50 /*
51 * Length of that header; note that some compilers may pad
52 * "struct firewire_header" to a multiple of 4 bytes, for example, so
53 * "sizeof (struct firewire_header)" may not give the right answer.
54 */
55 #define FIREWIRE_HDRLEN 18
56
57 static inline void
ap1394_hdr_print(register const u_char * bp,u_int length)58 ap1394_hdr_print(register const u_char *bp, u_int length)
59 {
60 register const struct firewire_header *fp;
61 u_int16_t firewire_type;
62
63 fp = (const struct firewire_header *)bp;
64
65 (void)printf("%s > %s",
66 linkaddr_string(fp->firewire_dhost, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN),
67 linkaddr_string(fp->firewire_shost, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN));
68
69 firewire_type = EXTRACT_16BITS(&fp->firewire_type);
70 if (!qflag) {
71 (void)printf(", ethertype %s (0x%04x)",
72 tok2str(ethertype_values,"Unknown", firewire_type),
73 firewire_type);
74 } else {
75 (void)printf(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type));
76 }
77
78 (void)printf(", length %u: ", length);
79 }
80
81 /*
82 * This is the top level routine of the printer. 'p' points
83 * to the ether header of the packet, 'h->ts' is the timestamp,
84 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
85 * is the number of bytes actually captured.
86 */
87 u_int
ap1394_if_print(const struct pcap_pkthdr * h,const u_char * p)88 ap1394_if_print(const struct pcap_pkthdr *h, const u_char *p)
89 {
90 u_int length = h->len;
91 u_int caplen = h->caplen;
92 struct firewire_header *fp;
93 u_short ether_type;
94
95 if (caplen < FIREWIRE_HDRLEN) {
96 printf("[|ap1394]");
97 return FIREWIRE_HDRLEN;
98 }
99
100 if (eflag)
101 ap1394_hdr_print(p, length);
102
103 length -= FIREWIRE_HDRLEN;
104 caplen -= FIREWIRE_HDRLEN;
105 fp = (struct firewire_header *)p;
106 p += FIREWIRE_HDRLEN;
107
108 ether_type = EXTRACT_16BITS(&fp->firewire_type);
109 if (ethertype_print(gndo, ether_type, p, length, caplen) == 0) {
110 /* ether_type not known, print raw packet */
111 if (!eflag)
112 ap1394_hdr_print((u_char *)fp, length + FIREWIRE_HDRLEN);
113
114 if (!suppress_default_print)
115 default_print(p, caplen);
116 }
117
118 return FIREWIRE_HDRLEN;
119 }
120