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 1.8 2024/09/02 16:15:33 christos Exp $"); 36 #endif 37 38 /* \summary: SunATM DLPI capture printer */ 39 40 #include <config.h> 41 42 #include "netdissect-stdinc.h" 43 44 #define ND_LONGJMP_FROM_TCHECK 45 #include "netdissect.h" 46 #include "extract.h" 47 48 #include "atm.h" 49 50 /* SunATM header for ATM packet */ 51 #define DIR_POS 0 /* Direction (0x80 = transmit, 0x00 = receive) */ 52 #define VPI_POS 1 /* VPI */ 53 #define VCI_POS 2 /* VCI */ 54 #define PKT_BEGIN_POS 4 /* Start of the ATM packet */ 55 56 /* Protocol type values in the bottom for bits of the byte at SUNATM_DIR_POS. */ 57 #define PT_LANE 0x01 /* LANE */ 58 #define PT_LLC 0x02 /* LLC encapsulation */ 59 60 /* 61 * This is the top level routine of the printer. 'p' points 62 * to the SunATM pseudo-header for the packet, 'h->ts' is the timestamp, 63 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 64 * is the number of bytes actually captured. 65 */ 66 void 67 sunatm_if_print(netdissect_options *ndo, 68 const struct pcap_pkthdr *h, const u_char *p) 69 { 70 u_int caplen = h->caplen; 71 u_int length = h->len; 72 u_short vci; 73 u_char vpi; 74 u_int traftype; 75 76 ndo->ndo_protocol = "sunatm"; 77 78 if (ndo->ndo_eflag) { 79 ND_PRINT(GET_U_1(p + DIR_POS) & 0x80 ? "Tx: " : "Rx: "); 80 } 81 82 switch (GET_U_1(p + DIR_POS) & 0x0f) { 83 84 case PT_LANE: 85 traftype = ATM_LANE; 86 break; 87 88 case PT_LLC: 89 traftype = ATM_LLC; 90 break; 91 92 default: 93 traftype = ATM_UNKNOWN; 94 break; 95 } 96 97 vpi = GET_U_1(p + VPI_POS); 98 vci = GET_BE_U_2(p + VCI_POS); 99 100 p += PKT_BEGIN_POS; 101 caplen -= PKT_BEGIN_POS; 102 length -= PKT_BEGIN_POS; 103 ndo->ndo_ll_hdr_len += PKT_BEGIN_POS; 104 atm_print(ndo, vpi, vci, traftype, p, length, caplen); 105 } 106