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 1.3.2.1 2005/07/07 01:24:33 guy 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, FIREWIRE_EUI64_LEN), 64 linkaddr_string(fp->firewire_shost, 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 } 120