1 /* 2 * Copyright (c) 1994, 1995, 1996, 1997 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 * $FreeBSD$ 22 */ 23 #ifndef lint 24 static const char rcsid[] = 25 "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.20 2000/12/22 22:45:09 guy Exp $ (LBL)"; 26 #endif 27 28 #ifdef HAVE_CONFIG_H 29 #include "config.h" 30 #endif 31 32 #include <sys/param.h> 33 #include <sys/time.h> 34 #include <sys/socket.h> 35 36 #include <netinet/in.h> 37 38 #include <stdio.h> 39 #include <pcap.h> 40 41 #include "interface.h" 42 #include "addrtoname.h" 43 #include "ethertype.h" 44 45 /* 46 * This is the top level routine of the printer. 'p' is the points 47 * to the LLC/SNAP header of the packet, 'tvp' is the timestamp, 48 * 'length' is the length of the packet off the wire, and 'caplen' 49 * is the number of bytes actually captured. 50 */ 51 void 52 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) 53 { 54 u_int caplen = h->caplen; 55 u_int length = h->len; 56 u_short ethertype, extracted_ethertype; 57 58 ts_print(&h->ts); 59 60 if (caplen < 8) { 61 printf("[|atm]"); 62 goto out; 63 } 64 65 if (p[4] == 0xaa || p[5] == 0xaa || p[6] == 0x03) { 66 /* if first 4 bytes are cookie/vpci */ 67 if (eflag) { 68 printf("%04x ", 69 p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]); 70 } 71 p += 4; 72 length -= 4; 73 caplen -= 4; 74 } 75 else if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) { 76 /*XXX assume 802.6 MAC header from fore driver */ 77 if (eflag) 78 printf("%04x%04x %04x%04x ", 79 p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3], 80 p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7], 81 p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11], 82 p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]); 83 p += 20; 84 length -= 20; 85 caplen -= 20; 86 } 87 ethertype = p[6] << 8 | p[7]; 88 if (eflag) 89 printf("%02x %02x %02x %02x-%02x-%02x %04x: ", 90 p[0], p[1], p[2], /* dsap/ssap/ctrl */ 91 p[3], p[4], p[5], /* manufacturer's code */ 92 ethertype); 93 94 /* 95 * Some printers want to get back at the ethernet addresses, 96 * and/or check that they're not walking off the end of the packet. 97 * Rather than pass them all the way down, we set these globals. 98 */ 99 packetp = p; 100 snapend = p + caplen; 101 102 length -= 8; 103 caplen -= 8; 104 p += 8; 105 106 switch (ethertype) { 107 108 case ETHERTYPE_IP: 109 ip_print(p, length); 110 break; 111 112 #ifdef INET6 113 case ETHERTYPE_IPV6: 114 ip6_print(p, length); 115 break; 116 #endif /*INET6*/ 117 118 /*XXX this probably isn't right */ 119 case ETHERTYPE_ARP: 120 case ETHERTYPE_REVARP: 121 arp_print(p, length, caplen); 122 break; 123 #ifdef notyet 124 case ETHERTYPE_DN: 125 decnet_print(p, length, caplen); 126 break; 127 128 case ETHERTYPE_ATALK: 129 if (vflag) 130 fputs("et1 ", stdout); 131 atalk_print(p, length); 132 break; 133 134 case ETHERTYPE_AARP: 135 aarp_print(p, length); 136 break; 137 138 case ETHERTYPE_LAT: 139 case ETHERTYPE_MOPRC: 140 case ETHERTYPE_MOPDL: 141 /* default_print for now */ 142 #endif 143 default: 144 /* ether_type not known, forward it to llc_print */ 145 if (!eflag) 146 printf("%02x %02x %02x %02x-%02x-%02x %04x: ", 147 packetp[0], packetp[1], packetp[2], /* dsap/ssap/ctrl */ 148 packetp[3], packetp[4], packetp[5], /* manufacturer's code */ 149 ethertype); 150 if (!xflag && !qflag) { 151 extracted_ethertype = 0; 152 /* default_print(p, caplen); */ 153 llc_print(p-8,length+8,caplen+8,"000000","000000", &extracted_ethertype); 154 } 155 } 156 if (xflag) 157 default_print(p, caplen); 158 out: 159 putchar('\n'); 160 } 161