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 1.8 2024/09/02 16:15:30 christos Exp $"); 24 #endif 25 26 /* \summary: Apple IP-over-IEEE 1394 printer */ 27 28 #include <config.h> 29 30 #include "netdissect-stdinc.h" 31 32 #define ND_LONGJMP_FROM_TCHECK 33 #include "netdissect.h" 34 #include "extract.h" 35 #include "addrtoname.h" 36 #include "ethertype.h" 37 38 /* 39 * Structure of a header for Apple's IP-over-IEEE 1384 BPF header. 40 */ 41 #define FIREWIRE_EUI64_LEN 8 42 struct firewire_header { 43 nd_byte firewire_dhost[FIREWIRE_EUI64_LEN]; 44 nd_byte firewire_shost[FIREWIRE_EUI64_LEN]; 45 nd_uint16_t firewire_type; 46 }; 47 48 /* 49 * Length of that header; note that some compilers may pad 50 * "struct firewire_header" to a multiple of 4 bytes, for example, so 51 * "sizeof (struct firewire_header)" may not give the right answer. 52 */ 53 #define FIREWIRE_HDRLEN 18 54 55 static const char * 56 fwaddr_string(netdissect_options *ndo, const u_char *addr) 57 { 58 return GET_LINKADDR_STRING(addr, LINKADDR_IEEE1394, FIREWIRE_EUI64_LEN); 59 } 60 61 static void 62 ap1394_hdr_print(netdissect_options *ndo, const u_char *bp, u_int length) 63 { 64 const struct firewire_header *fp; 65 uint16_t firewire_type; 66 67 fp = (const struct firewire_header *)bp; 68 69 ND_PRINT("%s > %s", 70 fwaddr_string(ndo, fp->firewire_shost), 71 fwaddr_string(ndo, fp->firewire_dhost)); 72 73 firewire_type = GET_BE_U_2(fp->firewire_type); 74 if (!ndo->ndo_qflag) { 75 ND_PRINT(", ethertype %s (0x%04x)", 76 tok2str(ethertype_values,"Unknown", firewire_type), 77 firewire_type); 78 } else { 79 ND_PRINT(", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", firewire_type)); 80 } 81 82 ND_PRINT(", length %u: ", length); 83 } 84 85 /* 86 * This is the top level routine of the printer. 'p' points 87 * to the ether header of the packet, 'h->ts' is the timestamp, 88 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 89 * is the number of bytes actually captured. 90 */ 91 void 92 ap1394_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p) 93 { 94 u_int length = h->len; 95 u_int caplen = h->caplen; 96 const struct firewire_header *fp; 97 u_short ether_type; 98 struct lladdr_info src, dst; 99 100 ndo->ndo_protocol = "ap1394"; 101 ND_TCHECK_LEN(p, FIREWIRE_HDRLEN); 102 ndo->ndo_ll_hdr_len += FIREWIRE_HDRLEN; 103 104 if (ndo->ndo_eflag) 105 ap1394_hdr_print(ndo, p, length); 106 107 length -= FIREWIRE_HDRLEN; 108 caplen -= FIREWIRE_HDRLEN; 109 fp = (const struct firewire_header *)p; 110 p += FIREWIRE_HDRLEN; 111 112 ether_type = GET_BE_U_2(fp->firewire_type); 113 src.addr = fp->firewire_shost; 114 src.addr_string = fwaddr_string; 115 dst.addr = fp->firewire_dhost; 116 dst.addr_string = fwaddr_string; 117 if (ethertype_print(ndo, ether_type, p, length, caplen, &src, &dst) == 0) { 118 /* ether_type not known, print raw packet */ 119 if (!ndo->ndo_eflag) 120 ap1394_hdr_print(ndo, (const u_char *)fp, length + FIREWIRE_HDRLEN); 121 122 if (!ndo->ndo_suppress_default_print) 123 ND_DEFAULTPRINT(p, caplen); 124 } 125 } 126