1 /* $OpenBSD: print-atm.c,v 1.15 2021/12/01 18:28:45 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995, 1996, 1997 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that: (1) source code distributions 9 * retain the above copyright notice and this paragraph in its entirety, (2) 10 * distributions including binary code include the above copyright notice and 11 * this paragraph in its entirety in the documentation or other materials 12 * provided with the distribution, and (3) all advertising materials mentioning 13 * features or use of this software display the following acknowledgement: 14 * ``This product includes software developed by the University of California, 15 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 16 * the University nor the names of its contributors may be used to endorse 17 * or promote products derived from this software without specific prior 18 * written permission. 19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 22 */ 23 24 #include <sys/time.h> 25 #include <sys/socket.h> 26 27 #include <net/if.h> 28 29 #include <netinet/in.h> 30 #include <netinet/if_ether.h> 31 #include <netinet/ip.h> 32 #include <netinet/ip_var.h> 33 #include <netinet/udp.h> 34 #include <netinet/udp_var.h> 35 #include <netinet/tcp.h> 36 37 #include <stdio.h> 38 #include <pcap.h> 39 40 #include "interface.h" 41 #include "addrtoname.h" 42 #include "ethertype.h" 43 44 /* 45 * This is the top level routine of the printer. 'p' is the points 46 * to the LLC/SNAP header of the packet, 'tvp' is the timestamp, 47 * 'length' is the length of the packet off the wire, and 'caplen' 48 * is the number of bytes actually captured. 49 */ 50 void 51 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) 52 { 53 u_int caplen = h->caplen; 54 u_int length = h->len; 55 u_short ethertype; 56 57 ts_print(&h->ts); 58 59 if (caplen < 8) { 60 printf("[|atm]"); 61 goto out; 62 } 63 if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) { 64 /*XXX assume 802.6 MAC header from fore driver */ 65 #define MIN_ATM_8026_HDRLEN (20 + 8) 66 if (caplen < MIN_ATM_8026_HDRLEN) { 67 printf("[|atm]"); 68 goto out; 69 } 70 if (eflag) 71 printf("%04x%04x %04x%04x ", 72 p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3], 73 p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7], 74 p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11], 75 p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]); 76 p += 20; 77 length -= 20; 78 caplen -= 20; 79 } 80 ethertype = p[6] << 8 | p[7]; 81 if (eflag) 82 printf("%02x %02x %02x %02x-%02x-%02x %04x: ", 83 p[0], p[1], p[2], /* dsap/ssap/ctrl */ 84 p[3], p[4], p[5], /* manufacturer's code */ 85 ethertype); 86 87 /* 88 * Some printers want to get back at the ethernet addresses, 89 * and/or check that they're not walking off the end of the packet. 90 * Rather than pass them all the way down, we set these globals. 91 */ 92 packetp = p; 93 snapend = p + caplen; 94 95 length -= 8; 96 caplen -= 8; 97 p += 8; 98 99 switch (ethertype) { 100 101 case ETHERTYPE_IP: 102 ip_print(p, length); 103 break; 104 105 case ETHERTYPE_IPV6: 106 ip6_print(p, length); 107 break; 108 109 /*XXX this probably isn't right */ 110 case ETHERTYPE_ARP: 111 case ETHERTYPE_REVARP: 112 arp_print(p, length, caplen); 113 break; 114 #ifdef notyet 115 case ETHERTYPE_DN: 116 decnet_print(p, length, caplen); 117 break; 118 119 case ETHERTYPE_ATALK: 120 if (vflag) 121 printf("et1 "); 122 atalk_print(p, length); 123 break; 124 125 case ETHERTYPE_AARP: 126 aarp_print(p, length); 127 break; 128 129 case ETHERTYPE_LAT: 130 case ETHERTYPE_MOPRC: 131 case ETHERTYPE_MOPDL: 132 /* default_print for now */ 133 #endif 134 default: 135 /* ether_type not known, print raw packet */ 136 if (!eflag) 137 printf("%02x %02x %02x %02x-%02x-%02x %04x: ", 138 p[0], p[1], p[2], /* dsap/ssap/ctrl */ 139 p[3], p[4], p[5], /* manufacturer's code */ 140 ethertype); 141 if (!xflag && !qflag) 142 default_print(p, caplen); 143 } 144 if (xflag) 145 default_print(p, caplen); 146 out: 147 putchar('\n'); 148 } 149