124 lines
3.0 KiB
C
124 lines
3.0 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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#define NETDISSECT_REWORKED
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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 <tcpdump-stdinc.h>
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#include "interface.h"
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#include "extract.h"
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#include "ether.h"
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struct lecdatahdr_8023 {
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uint16_t le_header;
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uint8_t h_dest[ETHER_ADDR_LEN];
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uint8_t h_source[ETHER_ADDR_LEN];
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uint16_t h_type;
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};
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struct lane_controlhdr {
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uint16_t lec_header;
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uint8_t lec_proto;
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uint8_t lec_vers;
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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((ndo, "lecid:%x ", EXTRACT_16BITS(bp)));
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}
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/*
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* This is the top level routine of the printer. 'p' points
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* to the LANE header of the packet, 'h->ts' is the timestamp,
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* 'h->len' is the length of the packet off the wire, and 'h->caplen'
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* is the number of bytes actually captured.
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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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struct lane_controlhdr *lec;
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if (caplen < sizeof(struct lane_controlhdr)) {
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ND_PRINT((ndo, "[|lane]"));
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return;
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}
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lec = (struct lane_controlhdr *)p;
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if (EXTRACT_16BITS(&lec->lec_header) == 0xff00) {
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/*
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* LE Control.
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*/
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ND_PRINT((ndo, "lec: proto %x vers %x %s",
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lec->lec_proto, lec->lec_vers,
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tok2str(lecop2str, "opcode-#%u", EXTRACT_16BITS(&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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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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u_int
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lane_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
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{
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lane_print(ndo, p, h->len, h->caplen);
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return (sizeof(struct lecdatahdr_8023));
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}
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