contrib/tcpdump/print-ap1394.c

   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 "addrtoname.h"
  37 #include "ethertype.h"
  38
  39 /*
  40  * Structure of a header for Apple's IP-over-IEEE 1384 BPF header.
  41  */
  42 #define FIREWIRE_EUI64_LEN      8
  43 struct firewire_header {
  44         u_char  firewire_dhost[FIREWIRE_EUI64_LEN];
  45         u_char  firewire_shost[FIREWIRE_EUI64_LEN];
  46         u_short firewire_type;
  47 };
  48
  49 /*
  50  * Length of that header; note that some compilers may pad
  51  * "struct firewire_header" to a multiple of 4 bytes, for example, so
  52  * "sizeof (struct firewire_header)" may not give the right answer.
  53  */
  54 #define FIREWIRE_HDRLEN         18
  55
  56 static inline void
  57 ap1394_hdr_print(register const u_char *bp, u_int length)
  58 {
  59         register const struct firewire_header *fp;
  60         fp = (const struct firewire_header *)bp;
  61
  62         (void)printf("%s > %s",
  63                      linkaddr_string(fp->firewire_dhost, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN),
  64                      linkaddr_string(fp->firewire_shost, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN));
  65
  66         if (!qflag) {
  67                 (void)printf(", ethertype %s (0x%04x)",
  68                                tok2str(ethertype_values,"Unknown", ntohs(fp->firewire_type)),
  69                                ntohs(fp->firewire_type));
  70         } else {
  71                 (void)printf(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ntohs(fp->firewire_type)));
  72         }
  73
  74         (void)printf(", length %u: ", length);
  75 }
  76
  77 /*
  78  * This is the top level routine of the printer.  'p' points
  79  * to the ether header of the packet, 'h->ts' is the timestamp,
  80  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  81  * is the number of bytes actually captured.
  82  */
  83 u_int
  84 ap1394_if_print(const struct pcap_pkthdr *h, const u_char *p)
  85 {
  86         u_int length = h->len;
  87         u_int caplen = h->caplen;
  88         struct firewire_header *fp;
  89         u_short ether_type;
  90         u_short extracted_ether_type;
  91
  92         if (caplen < FIREWIRE_HDRLEN) {
  93                 printf("[|ap1394]");
  94                 return FIREWIRE_HDRLEN;
  95         }
  96
  97         if (eflag)
  98                 ap1394_hdr_print(p, length);
  99
 100         length -= FIREWIRE_HDRLEN;
 101         caplen -= FIREWIRE_HDRLEN;
 102         fp = (struct firewire_header *)p;
 103         p += FIREWIRE_HDRLEN;
 104
 105         ether_type = ntohs(fp->firewire_type);
 106
 107         extracted_ether_type = 0;
 108         if (ether_encap_print(ether_type, p, length, caplen,
 109             &extracted_ether_type) == 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 }