contrib/tcpdump/print-lane.c

   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 }