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 22 /* \summary: Apple IP-over-IEEE 1394 printer */ 23 24 #ifdef HAVE_CONFIG_H 25 #include <config.h> 26 #endif 27 28 #include "netdissect-stdinc.h" 29 30 #define ND_LONGJMP_FROM_TCHECK 31 #include "netdissect.h" 32 #include "extract.h" 33 #include "addrtoname.h" 34 #include "ethertype.h" 35 36 /* 37 * Structure of a header for Apple's IP-over-IEEE 1384 BPF header. 38 */ 39 #define FIREWIRE_EUI64_LEN 8 40 struct firewire_header { 41 nd_byte firewire_dhost[FIREWIRE_EUI64_LEN]; 42 nd_byte firewire_shost[FIREWIRE_EUI64_LEN]; 43 nd_uint16_t firewire_type; 44 }; 45 46 /* 47 * Length of that header; note that some compilers may pad 48 * "struct firewire_header" to a multiple of 4 bytes, for example, so 49 * "sizeof (struct firewire_header)" may not give the right answer. 50 */ 51 #define FIREWIRE_HDRLEN 18 52 53 static const char * 54 fwaddr_string(netdissect_options *ndo, const u_char *addr) 55 { 56 return GET_LINKADDR_STRING(addr, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN); 57 } 58 59 static void 60 ap1394_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) 61 { 62 const struct firewire_header *fp; 63 uint16_t firewire_type; 64 65 fp = (const struct firewire_header *)bp; 66 67 ND_PRINT("%s > %s", 68 fwaddr_string(ndo, fp->firewire_shost), 69 fwaddr_string(ndo, fp->firewire_dhost)); 70 71 firewire_type = GET_BE_U_2(fp->firewire_type); 72 if (!ndo->ndo_qflag) { 73 ND_PRINT(", ethertype %s (0x%04x)", 74 tok2str(ethertype_values,"Unknown", firewire_type), 75 firewire_type); 76 } else { 77 ND_PRINT(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type)); 78 } 79 80 ND_PRINT(", length %u: ", length); 81 } 82 83 /* 84 * This is the top level routine of the printer. 'p' points 85 * to the ether header of the packet, 'h->ts' is the timestamp, 86 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 87 * is the number of bytes actually captured. 88 */ 89 void 90 ap1394_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 91 { 92 u_int length = h->len; 93 u_int caplen = h->caplen; 94 const struct firewire_header *fp; 95 u_short ether_type; 96 struct lladdr_info src, dst; 97 98 ndo->ndo_protocol = "ap1394"; 99 ND_TCHECK_LEN(p, FIREWIRE_HDRLEN); 100 ndo->ndo_ll_hdr_len += FIREWIRE_HDRLEN; 101 102 if (ndo->ndo_eflag) 103 ap1394_hdr_print(ndo, p, length); 104 105 length -= FIREWIRE_HDRLEN; 106 caplen -= FIREWIRE_HDRLEN; 107 fp = (const struct firewire_header *)p; 108 p += FIREWIRE_HDRLEN; 109 110 ether_type = GET_BE_U_2(fp->firewire_type); 111 src.addr = fp->firewire_shost; 112 src.addr_string = fwaddr_string; 113 dst.addr = fp->firewire_dhost; 114 dst.addr_string = fwaddr_string; 115 if (ethertype_print(ndo, ether_type, p, length, caplen, &src, &dst) == 0) { 116 /* ether_type not known, print raw packet */ 117 if (!ndo->ndo_eflag) 118 ap1394_hdr_print(ndo, (const u_char *)fp, length + FIREWIRE_HDRLEN); 119 120 if (!ndo->ndo_suppress_default_print) 121 ND_DEFAULTPRINT(p, caplen); 122 } 123 } 124