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