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      1 /*
      2  * Marko Kiiskila carnil (at) 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 }
    119