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 #include <sys/cdefs.h> 22 #ifndef lint 23 __RCSID("$NetBSD: print-ap1394.c,v 1.6 2017/02/05 04:05:05 spz Exp $"); 24 #endif 25 26 /* \summary: Apple IP-over-IEEE 1394 printer */ 27 28 #ifdef HAVE_CONFIG_H 29 #include "config.h" 30 #endif 31 32 #include <netdissect-stdinc.h> 33 34 #include "netdissect.h" 35 #include "extract.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 const char * 57 fwaddr_string(netdissect_options *ndo, const u_char *addr) 58 { 59 return (linkaddr_string(ndo, addr, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN)); 60 } 61 62 static inline void 63 ap1394_hdr_print(netdissect_options *ndo, register const u_char *bp, u_int length) 64 { 65 register const struct firewire_header *fp; 66 uint16_t firewire_type; 67 68 fp = (const struct firewire_header *)bp; 69 70 ND_PRINT((ndo, "%s > %s", 71 fwaddr_string(ndo, fp->firewire_shost), 72 fwaddr_string(ndo, fp->firewire_dhost))); 73 74 firewire_type = EXTRACT_16BITS(&fp->firewire_type); 75 if (!ndo->ndo_qflag) { 76 ND_PRINT((ndo, ", ethertype %s (0x%04x)", 77 tok2str(ethertype_values,"Unknown", firewire_type), 78 firewire_type)); 79 } else { 80 ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type))); 81 } 82 83 ND_PRINT((ndo, ", length %u: ", length)); 84 } 85 86 /* 87 * This is the top level routine of the printer. 'p' points 88 * to the ether header of the packet, 'h->ts' is the timestamp, 89 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 90 * is the number of bytes actually captured. 91 */ 92 u_int 93 ap1394_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 94 { 95 u_int length = h->len; 96 u_int caplen = h->caplen; 97 const struct firewire_header *fp; 98 u_short ether_type; 99 struct lladdr_info src, dst; 100 101 if (caplen < FIREWIRE_HDRLEN) { 102 ND_PRINT((ndo, "[|ap1394]")); 103 return FIREWIRE_HDRLEN; 104 } 105 106 if (ndo->ndo_eflag) 107 ap1394_hdr_print(ndo, p, length); 108 109 length -= FIREWIRE_HDRLEN; 110 caplen -= FIREWIRE_HDRLEN; 111 fp = (const struct firewire_header *)p; 112 p += FIREWIRE_HDRLEN; 113 114 ether_type = EXTRACT_16BITS(&fp->firewire_type); 115 src.addr = fp->firewire_shost; 116 src.addr_string = fwaddr_string; 117 dst.addr = fp->firewire_dhost; 118 dst.addr_string = fwaddr_string; 119 if (ethertype_print(ndo, ether_type, p, length, caplen, &src, &dst) == 0) { 120 /* ether_type not known, print raw packet */ 121 if (!ndo->ndo_eflag) 122 ap1394_hdr_print(ndo, (const u_char *)fp, length + FIREWIRE_HDRLEN); 123 124 if (!ndo->ndo_suppress_default_print) 125 ND_DEFAULTPRINT(p, caplen); 126 } 127 128 return FIREWIRE_HDRLEN; 129 } 130