1127668Sbms/* 2127668Sbms * Copyright (c) 1997 Yen Yen Lim and North Dakota State University 3127668Sbms * All rights reserved. 4127668Sbms * 5127668Sbms * Redistribution and use in source and binary forms, with or without 6127668Sbms * modification, are permitted provided that the following conditions 7127668Sbms * are met: 8127668Sbms * 1. Redistributions of source code must retain the above copyright 9127668Sbms * notice, this list of conditions and the following disclaimer. 10127668Sbms * 2. Redistributions in binary form must reproduce the above copyright 11127668Sbms * notice, this list of conditions and the following disclaimer in the 12127668Sbms * documentation and/or other materials provided with the distribution. 13127668Sbms * 3. All advertising materials mentioning features or use of this software 14127668Sbms * must display the following acknowledgement: 15127668Sbms * This product includes software developed by Yen Yen Lim and 16127668Sbms North Dakota State University 17127668Sbms * 4. The name of the author may not be used to endorse or promote products 18127668Sbms * derived from this software without specific prior written permission. 19127668Sbms * 20127668Sbms * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21127668Sbms * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22127668Sbms * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23127668Sbms * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 24127668Sbms * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25127668Sbms * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26127668Sbms * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27127668Sbms * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28127668Sbms * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 29127668Sbms * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30127668Sbms * POSSIBILITY OF SUCH DAMAGE. 31127668Sbms */ 32127668Sbms 33276788Sdelphij#define NETDISSECT_REWORKED 34127668Sbms#ifdef HAVE_CONFIG_H 35127668Sbms#include "config.h" 36127668Sbms#endif 37127668Sbms 38127668Sbms#include <tcpdump-stdinc.h> 39276788Sdelphij 40127668Sbmsstruct mbuf; 41127668Sbmsstruct rtentry; 42127668Sbms 43127668Sbms#include "interface.h" 44127668Sbms#include "extract.h" 45127668Sbms 46127668Sbms#include "atm.h" 47127668Sbms 48127668Sbms/* SunATM header for ATM packet */ 49127668Sbms#define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */ 50127668Sbms#define VPI_POS 1 /* VPI */ 51127668Sbms#define VCI_POS 2 /* VCI */ 52127668Sbms#define PKT_BEGIN_POS 4 /* Start of the ATM packet */ 53127668Sbms 54127668Sbms/* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */ 55127668Sbms#define PT_LANE 0x01 /* LANE */ 56127668Sbms#define PT_LLC 0x02 /* LLC encapsulation */ 57127668Sbms 58127668Sbms/* 59127668Sbms * This is the top level routine of the printer. 'p' points 60127668Sbms * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp, 61146773Ssam * 'h->len' is the length of the packet off the wire, and 'h->caplen' 62127668Sbms * is the number of bytes actually captured. 63127668Sbms */ 64127668Sbmsu_int 65276788Sdelphijsunatm_if_print(netdissect_options *ndo, 66276788Sdelphij const struct pcap_pkthdr *h, const u_char *p) 67127668Sbms{ 68127668Sbms u_int caplen = h->caplen; 69127668Sbms u_int length = h->len; 70127668Sbms u_short vci; 71127668Sbms u_char vpi; 72127668Sbms u_int traftype; 73127668Sbms 74127668Sbms if (caplen < PKT_BEGIN_POS) { 75276788Sdelphij ND_PRINT((ndo, "[|atm]")); 76127668Sbms return (caplen); 77127668Sbms } 78127668Sbms 79276788Sdelphij if (ndo->ndo_eflag) { 80276788Sdelphij ND_PRINT((ndo, p[DIR_POS] & 0x80 ? "Tx: " : "Rx: ")); 81127668Sbms } 82127668Sbms 83127668Sbms switch (p[DIR_POS] & 0x0f) { 84127668Sbms 85127668Sbms case PT_LANE: 86127668Sbms traftype = ATM_LANE; 87127668Sbms break; 88127668Sbms 89127668Sbms case PT_LLC: 90127668Sbms traftype = ATM_LLC; 91127668Sbms break; 92127668Sbms 93127668Sbms default: 94127668Sbms traftype = ATM_UNKNOWN; 95127668Sbms break; 96127668Sbms } 97127668Sbms 98127668Sbms vci = EXTRACT_16BITS(&p[VCI_POS]); 99127668Sbms vpi = p[VPI_POS]; 100127668Sbms 101127668Sbms p += PKT_BEGIN_POS; 102127668Sbms caplen -= PKT_BEGIN_POS; 103127668Sbms length -= PKT_BEGIN_POS; 104276788Sdelphij atm_print(ndo, vpi, vci, traftype, p, length, caplen); 105127668Sbms 106127668Sbms return (PKT_BEGIN_POS); 107127668Sbms} 108