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