1 /* 2 * Marko Kiiskila carnil@cs.tut.fi 3 * 4 * Tampere University of Technology - Telecommunications Laboratory 5 * 6 * Permission to use, copy, modify and distribute this 7 * software and its documentation is hereby granted, 8 * provided that both the copyright notice and this 9 * permission notice appear in all copies of the software, 10 * derivative works or modified versions, and any portions 11 * thereof, that both notices appear in supporting 12 * documentation, and that the use of this software is 13 * acknowledged in any publications resulting from using 14 * the software. 15 * 16 * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR 18 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS 19 * SOFTWARE. 20 * 21 */ 22 23 #ifndef lint 24 static const char rcsid[] _U_ = 25 "@(#) $Header: /tcpdump/master/tcpdump/print-lane.c,v 1.25 2005-11-13 12:12:42 guy Exp $ (LBL)"; 26 #endif 27 28 #ifdef HAVE_CONFIG_H 29 #include "config.h" 30 #endif 31 32 #include <tcpdump-stdinc.h> 33 34 #include <stdio.h> 35 #include <pcap.h> 36 37 #include "interface.h" 38 #include "addrtoname.h" 39 #include "extract.h" 40 #include "ether.h" 41 #include "lane.h" 42 43 static const struct tok lecop2str[] = { 44 { 0x0001, "configure request" }, 45 { 0x0101, "configure response" }, 46 { 0x0002, "join request" }, 47 { 0x0102, "join response" }, 48 { 0x0003, "ready query" }, 49 { 0x0103, "ready indication" }, 50 { 0x0004, "register request" }, 51 { 0x0104, "register response" }, 52 { 0x0005, "unregister request" }, 53 { 0x0105, "unregister response" }, 54 { 0x0006, "ARP request" }, 55 { 0x0106, "ARP response" }, 56 { 0x0007, "flush request" }, 57 { 0x0107, "flush response" }, 58 { 0x0008, "NARP request" }, 59 { 0x0009, "topology request" }, 60 { 0, NULL } 61 }; 62 63 static void 64 lane_hdr_print(netdissect_options *ndo, const u_char *bp) 65 { 66 (void)ND_PRINT((ndo, "lecid:%x ", EXTRACT_16BITS(bp))); 67 } 68 69 /* 70 * This is the top level routine of the printer. 'p' points 71 * to the LANE header of the packet, 'h->ts' is the timestamp, 72 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 73 * is the number of bytes actually captured. 74 * 75 * This assumes 802.3, not 802.5, LAN emulation. 76 */ 77 void 78 lane_print(const u_char *p, u_int length, u_int caplen) 79 { 80 struct lane_controlhdr *lec; 81 82 if (caplen < sizeof(struct lane_controlhdr)) { 83 printf("[|lane]"); 84 return; 85 } 86 87 lec = (struct lane_controlhdr *)p; 88 if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) { 89 /* 90 * LE Control. 91 */ 92 printf("lec: proto %x vers %x %s", 93 lec->lec_proto, lec->lec_vers, 94 tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&lec->lec_opcode))); 95 return; 96 } 97 98 /* 99 * Go past the LE header. 100 */ 101 length -= 2; 102 caplen -= 2; 103 p += 2; 104 105 /* 106 * Now print the encapsulated frame, under the assumption 107 * that it's an Ethernet frame. 108 */ 109 ether_print(gndo, p, length, caplen, lane_hdr_print, p - 2); 110 } 111 112 u_int 113 lane_if_print(const struct pcap_pkthdr *h, const u_char *p) 114 { 115 lane_print(p, h->len, h->caplen); 116 117 return (sizeof(struct lecdatahdr_8023)); 118 } 119