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 1.23.2.2 2005/11/13 12:12:59 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 inline void lane_hdr_print(register const u_char * bp,int length)64 lane_hdr_print(register const u_char *bp, int length) 65 { 66 register const struct lecdatahdr_8023 *ep; 67 68 ep = (const struct lecdatahdr_8023 *)bp; 69 if (qflag) 70 (void)printf("lecid:%x %s %s %d: ", 71 EXTRACT_16BITS(&ep->le_header), 72 etheraddr_string(ep->h_source), 73 etheraddr_string(ep->h_dest), 74 length); 75 else 76 (void)printf("lecid:%x %s %s %s %d: ", 77 EXTRACT_16BITS(&ep->le_header), 78 etheraddr_string(ep->h_source), 79 etheraddr_string(ep->h_dest), 80 etherproto_string(ep->h_type), 81 length); 82 } 83 84 /* 85 * This is the top level routine of the printer. 'p' points 86 * to the LANE header of the packet, 'h->ts' is the timestamp, 87 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 88 * is the number of bytes actually captured. 89 * 90 * This assumes 802.3, not 802.5, LAN emulation. 91 */ 92 void lane_print(const u_char * p,u_int length,u_int caplen)93 lane_print(const u_char *p, u_int length, u_int caplen) 94 { 95 struct lane_controlhdr *lec; 96 struct lecdatahdr_8023 *ep; 97 u_short ether_type; 98 u_short extracted_ethertype; 99 100 if (caplen < sizeof(struct lane_controlhdr)) { 101 printf("[|lane]"); 102 return; 103 } 104 105 lec = (struct lane_controlhdr *)p; 106 if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) { 107 /* 108 * LE Control. 109 */ 110 printf("lec: proto %x vers %x %s", 111 lec->lec_proto, lec->lec_vers, 112 tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&lec->lec_opcode))); 113 return; 114 } 115 116 if (caplen < sizeof(struct lecdatahdr_8023)) { 117 printf("[|lane]"); 118 return; 119 } 120 121 if (eflag) 122 lane_hdr_print(p, length); 123 124 /* 125 * Go past the LANE header. 126 */ 127 length -= sizeof(struct lecdatahdr_8023); 128 caplen -= sizeof(struct lecdatahdr_8023); 129 ep = (struct lecdatahdr_8023 *)p; 130 p += sizeof(struct lecdatahdr_8023); 131 132 ether_type = EXTRACT_16BITS(&ep->h_type); 133 134 /* 135 * Is it (gag) an 802.3 encapsulation? 136 */ 137 if (ether_type <= ETHERMTU) { 138 /* Try to print the LLC-layer header & higher layers */ 139 if (llc_print(p, length, caplen, ep->h_source, ep->h_dest, 140 &extracted_ethertype) == 0) { 141 /* ether_type not known, print raw packet */ 142 if (!eflag) 143 lane_hdr_print((u_char *)ep, length + sizeof(*ep)); 144 if (extracted_ethertype) { 145 printf("(LLC %s) ", 146 etherproto_string(htons(extracted_ethertype))); 147 } 148 if (!suppress_default_print) 149 default_print(p, caplen); 150 } 151 } else if (ether_encap_print(ether_type, p, length, caplen, 152 &extracted_ethertype) == 0) { 153 /* ether_type not known, print raw packet */ 154 if (!eflag) 155 lane_hdr_print((u_char *)ep, length + sizeof(*ep)); 156 if (!suppress_default_print) 157 default_print(p, caplen); 158 } 159 } 160 161 u_int lane_if_print(const struct pcap_pkthdr * h,const u_char * p)162 lane_if_print(const struct pcap_pkthdr *h, const u_char *p) 163 { 164 lane_print(p, h->len, h->caplen); 165 166 return (sizeof(struct lecdatahdr_8023)); 167 } 168