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 /* \summary: ATM LANE printer */ 24 25 #include <config.h> 26 27 #include "netdissect-stdinc.h" 28 29 #define ND_LONGJMP_FROM_TCHECK 30 #include "netdissect.h" 31 #include "extract.h" 32 33 struct lecdatahdr_8023 { 34 nd_uint16_t le_header; 35 nd_mac_addr h_dest; 36 nd_mac_addr h_source; 37 nd_uint16_t h_type; 38 }; 39 40 struct lane_controlhdr { 41 nd_uint16_t lec_header; 42 nd_uint8_t lec_proto; 43 nd_uint8_t lec_vers; 44 nd_uint16_t lec_opcode; 45 }; 46 47 static const struct tok lecop2str[] = { 48 { 0x0001, "configure request" }, 49 { 0x0101, "configure response" }, 50 { 0x0002, "join request" }, 51 { 0x0102, "join response" }, 52 { 0x0003, "ready query" }, 53 { 0x0103, "ready indication" }, 54 { 0x0004, "register request" }, 55 { 0x0104, "register response" }, 56 { 0x0005, "unregister request" }, 57 { 0x0105, "unregister response" }, 58 { 0x0006, "ARP request" }, 59 { 0x0106, "ARP response" }, 60 { 0x0007, "flush request" }, 61 { 0x0107, "flush response" }, 62 { 0x0008, "NARP request" }, 63 { 0x0009, "topology request" }, 64 { 0, NULL } 65 }; 66 67 static void 68 lane_hdr_print(netdissect_options *ndo, const u_char *bp) 69 { 70 ND_PRINT("lecid:%x ", GET_BE_U_2(bp)); 71 } 72 73 /* 74 * This assumes 802.3, not 802.5, LAN emulation. 75 */ 76 void 77 lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen) 78 { 79 const struct lane_controlhdr *lec; 80 81 ndo->ndo_protocol = "lane"; 82 83 lec = (const struct lane_controlhdr *)p; 84 if (GET_BE_U_2(lec->lec_header) == 0xff00) { 85 /* 86 * LE Control. 87 */ 88 ND_PRINT("lec: proto %x vers %x %s", 89 GET_U_1(lec->lec_proto), 90 GET_U_1(lec->lec_vers), 91 tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode))); 92 return; 93 } 94 95 /* 96 * Go past the LE header. 97 */ 98 ND_TCHECK_2(p); /* Needed */ 99 length -= 2; 100 caplen -= 2; 101 p += 2; 102 103 /* 104 * Now print the encapsulated frame, under the assumption 105 * that it's an Ethernet frame. 106 */ 107 ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2); 108 } 109