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 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 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