/*
* Marko Kiiskila [email protected]
*
* Tampere University of Technology - Telecommunications Laboratory
*
* Permission to use, copy, modify and distribute this
* software and its documentation is hereby granted,
* provided that both the copyright notice and this
* permission notice appear in all copies of the software,
* derivative works or modified versions, and any portions
* thereof, that both notices appear in supporting
* documentation, and that the use of this software is
* acknowledged in any publications resulting from using
* the software.
*
* TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS
* SOFTWARE.
*
*/

#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-lane.c,v 1.8 2024/09/02 16:15:31 christos Exp $");
#endif

/* \summary: ATM LANE printer */

#include <config.h>

#include "netdissect-stdinc.h"

#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"

struct lecdatahdr_8023 {
 nd_uint16_t le_header;
 nd_mac_addr h_dest;
 nd_mac_addr h_source;
 nd_uint16_t h_type;
};

struct lane_controlhdr {
 nd_uint16_t lec_header;
 nd_uint8_t  lec_proto;
 nd_uint8_t  lec_vers;
 nd_uint16_t lec_opcode;
};

static const struct tok lecop2str[] = {
       { 0x0001,       "configure request" },
       { 0x0101,       "configure response" },
       { 0x0002,       "join request" },
       { 0x0102,       "join response" },
       { 0x0003,       "ready query" },
       { 0x0103,       "ready indication" },
       { 0x0004,       "register request" },
       { 0x0104,       "register response" },
       { 0x0005,       "unregister request" },
       { 0x0105,       "unregister response" },
       { 0x0006,       "ARP request" },
       { 0x0106,       "ARP response" },
       { 0x0007,       "flush request" },
       { 0x0107,       "flush response" },
       { 0x0008,       "NARP request" },
       { 0x0009,       "topology request" },
       { 0,            NULL }
};

static void
lane_hdr_print(netdissect_options *ndo, const u_char *bp)
{
       ND_PRINT("lecid:%x ", GET_BE_U_2(bp));
}

/*
* This assumes 802.3, not 802.5, LAN emulation.
*/
void
lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen)
{
       const struct lane_controlhdr *lec;

       ndo->ndo_protocol = "lane";

       lec = (const struct lane_controlhdr *)p;
       if (GET_BE_U_2(lec->lec_header) == 0xff00) {
               /*
                * LE Control.
                */
               ND_PRINT("lec: proto %x vers %x %s",
                        GET_U_1(lec->lec_proto),
                        GET_U_1(lec->lec_vers),
                        tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode)));
               return;
       }

       /*
        * Go past the LE header.
        */
       ND_TCHECK_2(p); /* Needed */
       length -= 2;
       caplen -= 2;
       p += 2;

       /*
        * Now print the encapsulated frame, under the assumption
        * that it's an Ethernet frame.
        */
       ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2);
}