dist/tcpdump/print-ap1394.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23 #include <sys/cdefs.h>
  24 #ifndef lint
  25 #if 0
  26 static const char rcsid[] _U_ =
  27     "@(#) Header: /tcpdump/master/tcpdump/print-ap1394.c,v 1.3.2.1 2005/07/07 01:24:33 guy Exp (LBL)";
  28 #else
  29 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  30 #endif
  31 #endif
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #include <tcpdump-stdinc.h>
  38
  39 #include <stdio.h>
  40 #include <pcap.h>
  41
  42 #include "interface.h"
  43 #include "addrtoname.h"
  44 #include "ethertype.h"
  45
  46 /*
  47  * Structure of a header for Apple's IP-over-IEEE 1384 BPF header.
  48  */
  49 #define FIREWIRE_EUI64_LEN      8
  50 struct firewire_header {
  51         u_char  firewire_dhost[FIREWIRE_EUI64_LEN];
  52         u_char  firewire_shost[FIREWIRE_EUI64_LEN];
  53         u_short firewire_type;
  54 };
  55
  56 /*
  57  * Length of that header; note that some compilers may pad
  58  * "struct firewire_header" to a multiple of 4 bytes, for example, so
  59  * "sizeof (struct firewire_header)" may not give the right answer.
  60  */
  61 #define FIREWIRE_HDRLEN         18
  62
  63 static inline void
  64 ap1394_hdr_print(register const u_char *bp, u_int length)
  65 {
  66         register const struct firewire_header *fp;
  67         fp = (const struct firewire_header *)bp;
  68
  69         (void)printf("%s > %s",
  70                      linkaddr_string(fp->firewire_dhost, FIREWIRE_EUI64_LEN),
  71                      linkaddr_string(fp->firewire_shost, FIREWIRE_EUI64_LEN));
  72
  73         if (!qflag) {
  74                 (void)printf(", ethertype %s (0x%04x)",
  75                                tok2str(ethertype_values,"Unknown", ntohs(fp->firewire_type)),
  76                                ntohs(fp->firewire_type));
  77         } else {
  78                 (void)printf(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ntohs(fp->firewire_type)));
  79         }
  80
  81         (void)printf(", length %u: ", length);
  82 }
  83
  84 /*
  85  * This is the top level routine of the printer.  'p' points
  86  * to the ether header of the packet, 'h->ts' is the timestamp,
  87  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
  88  * is the number of bytes actually captured.
  89  */
  90 u_int
  91 ap1394_if_print(const struct pcap_pkthdr *h, const u_char *p)
  92 {
  93         u_int length = h->len;
  94         u_int caplen = h->caplen;
  95         struct firewire_header *fp;
  96         u_short ether_type;
  97         u_short extracted_ether_type;
  98
  99         if (caplen < FIREWIRE_HDRLEN) {
 100                 printf("[|ap1394]");
 101                 return FIREWIRE_HDRLEN;
 102         }
 103
 104         if (eflag)
 105                 ap1394_hdr_print(p, length);
 106
 107         length -= FIREWIRE_HDRLEN;
 108         caplen -= FIREWIRE_HDRLEN;
 109         fp = (struct firewire_header *)p;
 110         p += FIREWIRE_HDRLEN;
 111
 112         ether_type = ntohs(fp->firewire_type);
 113
 114         extracted_ether_type = 0;
 115         if (ether_encap_print(ether_type, p, length, caplen,
 116             &extracted_ether_type) == 0) {
 117                 /* ether_type not known, print raw packet */
 118                 if (!eflag)
 119                         ap1394_hdr_print((u_char *)fp, length + FIREWIRE_HDRLEN);
 120
 121                 if (!suppress_default_print)
 122                         default_print(p, caplen);
 123         }
 124
 125         return FIREWIRE_HDRLEN;
 126 }