1 /* 2 * Copyright (c) 1997 Yen Yen Lim and North Dakota State University 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Yen Yen Lim and 16 North Dakota State University 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 24 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 29 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static const char rcsid[] _U_ = 36 "@(#) Header: /tcpdump/master/tcpdump/print-sunatm.c,v 1.8 2004-03-17 23:24:38 guy Exp (LBL)"; 37 #else 38 __RCSID("$NetBSD: print-sunatm.c,v 1.2 2010/12/05 05:11:30 christos Exp $"); 39 #endif 40 #endif 41 42 #ifdef HAVE_CONFIG_H 43 #include "config.h" 44 #endif 45 46 #include <tcpdump-stdinc.h> 47 48 struct mbuf; 49 struct rtentry; 50 51 #include <stdio.h> 52 #include <pcap.h> 53 54 #include "interface.h" 55 #include "extract.h" 56 #include "addrtoname.h" 57 58 #include "atm.h" 59 #include "atmuni31.h" 60 61 /* SunATM header for ATM packet */ 62 #define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */ 63 #define VPI_POS 1 /* VPI */ 64 #define VCI_POS 2 /* VCI */ 65 #define PKT_BEGIN_POS 4 /* Start of the ATM packet */ 66 67 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */ 68 #define PT_LANE 0x01 /* LANE */ 69 #define PT_LLC 0x02 /* LLC encapsulation */ 70 71 /* 72 * This is the top level routine of the printer. 'p' points 73 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp, 74 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 75 * is the number of bytes actually captured. 76 */ 77 u_int 78 sunatm_if_print(const struct pcap_pkthdr *h, const u_char *p) 79 { 80 u_int caplen = h->caplen; 81 u_int length = h->len; 82 u_short vci; 83 u_char vpi; 84 u_int traftype; 85 86 if (caplen < PKT_BEGIN_POS) { 87 printf("[|atm]"); 88 return (caplen); 89 } 90 91 if (eflag) { 92 if (p[DIR_POS] & 0x80) 93 printf("Tx: "); 94 else 95 printf("Rx: "); 96 } 97 98 switch (p[DIR_POS] & 0x0f) { 99 100 case PT_LANE: 101 traftype = ATM_LANE; 102 break; 103 104 case PT_LLC: 105 traftype = ATM_LLC; 106 break; 107 108 default: 109 traftype = ATM_UNKNOWN; 110 break; 111 } 112 113 vci = EXTRACT_16BITS(&p[VCI_POS]); 114 vpi = p[VPI_POS]; 115 116 p += PKT_BEGIN_POS; 117 caplen -= PKT_BEGIN_POS; 118 length -= PKT_BEGIN_POS; 119 atm_print(vpi, vci, traftype, p, length, caplen); 120 121 return (PKT_BEGIN_POS); 122 } 123