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https://github.com/the-tcpdump-group/tcpdump.git
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111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/*
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* Marko Kiiskila carnil@cs.tut.fi
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*
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* Tampere University of Technology - Telecommunications Laboratory
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*
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* Permission to use, copy, modify and distribute this
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* software and its documentation is hereby granted,
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* provided that both the copyright notice and this
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* permission notice appear in all copies of the software,
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* derivative works or modified versions, and any portions
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* thereof, that both notices appear in supporting
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* documentation, and that the use of this software is
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* acknowledged in any publications resulting from using
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* the software.
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*
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* TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS
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* SOFTWARE.
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*
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*/
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/* \summary: ATM LANE printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#define ND_LONGJMP_FROM_TCHECK
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#include "netdissect.h"
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#include "extract.h"
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struct lecdatahdr_8023 {
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nd_uint16_t le_header;
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nd_mac_addr h_dest;
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nd_mac_addr h_source;
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nd_uint16_t h_type;
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};
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struct lane_controlhdr {
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nd_uint16_t lec_header;
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nd_uint8_t lec_proto;
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nd_uint8_t lec_vers;
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nd_uint16_t lec_opcode;
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};
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static const struct tok lecop2str[] = {
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{ 0x0001, "configure request" },
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{ 0x0101, "configure response" },
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{ 0x0002, "join request" },
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{ 0x0102, "join response" },
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{ 0x0003, "ready query" },
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{ 0x0103, "ready indication" },
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{ 0x0004, "register request" },
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{ 0x0104, "register response" },
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{ 0x0005, "unregister request" },
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{ 0x0105, "unregister response" },
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{ 0x0006, "ARP request" },
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{ 0x0106, "ARP response" },
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{ 0x0007, "flush request" },
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{ 0x0107, "flush response" },
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{ 0x0008, "NARP request" },
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{ 0x0009, "topology request" },
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{ 0, NULL }
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};
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static void
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lane_hdr_print(netdissect_options *ndo, const u_char *bp)
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{
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ND_PRINT("lecid:%x ", GET_BE_U_2(bp));
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}
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/*
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* This assumes 802.3, not 802.5, LAN emulation.
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*/
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void
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lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
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{
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const struct lane_controlhdr *lec;
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ndo->ndo_protocol = "lane";
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lec = (const struct lane_controlhdr *)p;
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if (GET_BE_U_2(lec->lec_header) == 0xff00) {
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/*
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* LE Control.
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*/
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ND_PRINT("lec: proto %x vers %x %s",
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GET_U_1(lec->lec_proto),
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GET_U_1(lec->lec_vers),
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tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode)));
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return;
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}
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/*
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* Go past the LE header.
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*/
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ND_TCHECK_2(p); /* Needed */
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length -= 2;
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caplen -= 2;
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p += 2;
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/*
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* Now print the encapsulated frame, under the assumption
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* that it's an Ethernet frame.
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*/
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ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2);
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}
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