1 /* $OpenBSD: print-atm.c,v 1.14 2020/01/24 22:46:36 procter 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 struct mbuf; 28 struct rtentry; 29 #include <net/if.h> 30 31 #include <netinet/in.h> 32 #include <netinet/if_ether.h> 33 #include <netinet/ip.h> 34 #include <netinet/ip_var.h> 35 #include <netinet/udp.h> 36 #include <netinet/udp_var.h> 37 #include <netinet/tcp.h> 38 39 #include <stdio.h> 40 #include <pcap.h> 41 42 #include "interface.h" 43 #include "addrtoname.h" 44 #include "ethertype.h" 45 46 /* 47 * This is the top level routine of the printer. 'p' is the points 48 * to the LLC/SNAP header of the packet, 'tvp' is the timestamp, 49 * 'length' is the length of the packet off the wire, and 'caplen' 50 * is the number of bytes actually captured. 51 */ 52 void 53 atm_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) 54 { 55 u_int caplen = h->caplen; 56 u_int length = h->len; 57 u_short ethertype; 58 59 ts_print(&h->ts); 60 61 if (caplen < 8) { 62 printf("[|atm]"); 63 goto out; 64 } 65 if (p[0] != 0xaa || p[1] != 0xaa || p[2] != 0x03) { 66 /*XXX assume 802.6 MAC header from fore driver */ 67 #define MIN_ATM_8026_HDRLEN (20 + 8) 68 if (caplen < MIN_ATM_8026_HDRLEN) { 69 printf("[|atm]"); 70 goto out; 71 } 72 if (eflag) 73 printf("%04x%04x %04x%04x ", 74 p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3], 75 p[4] << 24 | p[5] << 16 | p[6] << 8 | p[7], 76 p[8] << 24 | p[9] << 16 | p[10] << 8 | p[11], 77 p[12] << 24 | p[13] << 16 | p[14] << 8 | p[15]); 78 p += 20; 79 length -= 20; 80 caplen -= 20; 81 } 82 ethertype = p[6] << 8 | p[7]; 83 if (eflag) 84 printf("%02x %02x %02x %02x-%02x-%02x %04x: ", 85 p[0], p[1], p[2], /* dsap/ssap/ctrl */ 86 p[3], p[4], p[5], /* manufacturer's code */ 87 ethertype); 88 89 /* 90 * Some printers want to get back at the ethernet addresses, 91 * and/or check that they're not walking off the end of the packet. 92 * Rather than pass them all the way down, we set these globals. 93 */ 94 packetp = p; 95 snapend = p + caplen; 96 97 length -= 8; 98 caplen -= 8; 99 p += 8; 100 101 switch (ethertype) { 102 103 case ETHERTYPE_IP: 104 ip_print(p, length); 105 break; 106 107 case ETHERTYPE_IPV6: 108 ip6_print(p, length); 109 break; 110 111 /*XXX this probably isn't right */ 112 case ETHERTYPE_ARP: 113 case ETHERTYPE_REVARP: 114 arp_print(p, length, caplen); 115 break; 116 #ifdef notyet 117 case ETHERTYPE_DN: 118 decnet_print(p, length, caplen); 119 break; 120 121 case ETHERTYPE_ATALK: 122 if (vflag) 123 printf("et1 "); 124 atalk_print(p, length); 125 break; 126 127 case ETHERTYPE_AARP: 128 aarp_print(p, length); 129 break; 130 131 case ETHERTYPE_LAT: 132 case ETHERTYPE_MOPRC: 133 case ETHERTYPE_MOPDL: 134 /* default_print for now */ 135 #endif 136 default: 137 /* ether_type not known, print raw packet */ 138 if (!eflag) 139 printf("%02x %02x %02x %02x-%02x-%02x %04x: ", 140 p[0], p[1], p[2], /* dsap/ssap/ctrl */ 141 p[3], p[4], p[5], /* manufacturer's code */ 142 ethertype); 143 if (!xflag && !qflag) 144 default_print(p, caplen); 145 } 146 if (xflag) 147 default_print(p, caplen); 148 out: 149 putchar('\n'); 150 } 151