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 #ifndef lint 33 static const char rcsid[] _U_ = 34 "@(#) $Header: /tcpdump/master/tcpdump/print-sunatm.c,v 1.8 2004/03/17 23:24:38 guy Exp $ (LBL)"; 35 #endif 36 37 #ifdef HAVE_CONFIG_H 38 #include "config.h" 39 #endif 40 41 #include <tcpdump-stdinc.h> 42 43 struct mbuf; 44 struct rtentry; 45 46 #include <stdio.h> 47 #include <pcap.h> 48 49 #include "interface.h" 50 #include "extract.h" 51 #include "addrtoname.h" 52 53 #include "atm.h" 54 #include "atmuni31.h" 55 56 /* SunATM header for ATM packet */ 57 #define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */ 58 #define VPI_POS 1 /* VPI */ 59 #define VCI_POS 2 /* VCI */ 60 #define PKT_BEGIN_POS 4 /* Start of the ATM packet */ 61 62 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */ 63 #define PT_LANE 0x01 /* LANE */ 64 #define PT_LLC 0x02 /* LLC encapsulation */ 65 66 /* 67 * This is the top level routine of the printer. 'p' points 68 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp, 69 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 70 * is the number of bytes actually captured. 71 */ 72 u_int 73 sunatm_if_print(const struct pcap_pkthdr *h, const u_char *p) 74 { 75 u_int caplen = h->caplen; 76 u_int length = h->len; 77 u_short vci; 78 u_char vpi; 79 u_int traftype; 80 81 if (caplen < PKT_BEGIN_POS) { 82 printf("[|atm]"); 83 return (caplen); 84 } 85 86 if (eflag) { 87 if (p[DIR_POS] & 0x80) 88 printf("Tx: "); 89 else 90 printf("Rx: "); 91 } 92 93 switch (p[DIR_POS] & 0x0f) { 94 95 case PT_LANE: 96 traftype = ATM_LANE; 97 break; 98 99 case PT_LLC: 100 traftype = ATM_LLC; 101 break; 102 103 default: 104 traftype = ATM_UNKNOWN; 105 break; 106 } 107 108 vci = EXTRACT_16BITS(&p[VCI_POS]); 109 vpi = p[VPI_POS]; 110 111 p += PKT_BEGIN_POS; 112 caplen -= PKT_BEGIN_POS; 113 length -= PKT_BEGIN_POS; 114 atm_print(vpi, vci, traftype, p, length, caplen); 115 116 return (PKT_BEGIN_POS); 117 } 118
