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 1.7 2023/08/17 20:19:40 christos 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 #define ND_LONGJMP_FROM_TCHECK 35 #include "netdissect.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 nd_byte firewire_dhost[FIREWIRE_EUI64_LEN]; 46 nd_byte firewire_shost[FIREWIRE_EUI64_LEN]; 47 nd_uint16_t 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 const char * 58 fwaddr_string(netdissect_options *ndo, const u_char *addr) 59 { 60 return GET_LINKADDR_STRING(addr, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN); 61 } 62 63 static void 64 ap1394_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) 65 { 66 const struct firewire_header *fp; 67 uint16_t firewire_type; 68 69 fp = (const struct firewire_header *)bp; 70 71 ND_PRINT("%s > %s", 72 fwaddr_string(ndo, fp->firewire_shost), 73 fwaddr_string(ndo, fp->firewire_dhost)); 74 75 firewire_type = GET_BE_U_2(fp->firewire_type); 76 if (!ndo->ndo_qflag) { 77 ND_PRINT(", ethertype %s (0x%04x)", 78 tok2str(ethertype_values,"Unknown", firewire_type), 79 firewire_type); 80 } else { 81 ND_PRINT(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type)); 82 } 83 84 ND_PRINT(", length %u: ", length); 85 } 86 87 /* 88 * This is the top level routine of the printer. 'p' points 89 * to the ether header of the packet, 'h->ts' is the timestamp, 90 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 91 * is the number of bytes actually captured. 92 */ 93 void 94 ap1394_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 95 { 96 u_int length = h->len; 97 u_int caplen = h->caplen; 98 const struct firewire_header *fp; 99 u_short ether_type; 100 struct lladdr_info src, dst; 101 102 ndo->ndo_protocol = "ap1394"; 103 ND_TCHECK_LEN(p, FIREWIRE_HDRLEN); 104 ndo->ndo_ll_hdr_len += FIREWIRE_HDRLEN; 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 = GET_BE_U_2(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