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 33 #include <sys/cdefs.h> 34 #ifndef lint 35 __RCSID("$NetBSD: print-sunatm.c,v 1.4 2014/11/20 03:05:03 christos Exp $"); 36 #endif 37 38 #define NETDISSECT_REWORKED 39 #ifdef HAVE_CONFIG_H 40 #include "config.h" 41 #endif 42 43 #include <tcpdump-stdinc.h> 44 45 struct mbuf; 46 struct rtentry; 47 48 #include "interface.h" 49 #include "extract.h" 50 51 #include "atm.h" 52 53 /* SunATM header for ATM packet */ 54 #define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */ 55 #define VPI_POS 1 /* VPI */ 56 #define VCI_POS 2 /* VCI */ 57 #define PKT_BEGIN_POS 4 /* Start of the ATM packet */ 58 59 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */ 60 #define PT_LANE 0x01 /* LANE */ 61 #define PT_LLC 0x02 /* LLC encapsulation */ 62 63 /* 64 * This is the top level routine of the printer. 'p' points 65 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp, 66 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 67 * is the number of bytes actually captured. 68 */ 69 u_int 70 sunatm_if_print(netdissect_options *ndo, 71 const struct pcap_pkthdr *h, const u_char *p) 72 { 73 u_int caplen = h->caplen; 74 u_int length = h->len; 75 u_short vci; 76 u_char vpi; 77 u_int traftype; 78 79 if (caplen < PKT_BEGIN_POS) { 80 ND_PRINT((ndo, "[|atm]")); 81 return (caplen); 82 } 83 84 if (ndo->ndo_eflag) { 85 ND_PRINT((ndo, p[DIR_POS] & 0x80 ? "Tx: " : "Rx: ")); 86 } 87 88 switch (p[DIR_POS] & 0x0f) { 89 90 case PT_LANE: 91 traftype = ATM_LANE; 92 break; 93 94 case PT_LLC: 95 traftype = ATM_LLC; 96 break; 97 98 default: 99 traftype = ATM_UNKNOWN; 100 break; 101 } 102 103 vci = EXTRACT_16BITS(&p[VCI_POS]); 104 vpi = p[VPI_POS]; 105 106 p += PKT_BEGIN_POS; 107 caplen -= PKT_BEGIN_POS; 108 length -= PKT_BEGIN_POS; 109 atm_print(ndo, vpi, vci, traftype, p, length, caplen); 110 111 return (PKT_BEGIN_POS); 112 } 113