/*      $NetBSD: moptrace.c,v 1.13 2020/04/22 23:57:56 joerg Exp $      */

/*
* Copyright (c) 1993-95 Mats O Jansson.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "port.h"
#ifndef lint
__RCSID("$NetBSD: moptrace.c,v 1.13 2020/04/22 23:57:56 joerg Exp $");
#endif

/*
* moptrace - MOP Trace Utility
*
* Usage:       moptrace -a [ -d ] [ -3 | -4 ]
*              moptrace [ -d ] [ -3 | -4 ] interface
*/

#include "os.h"
#include "common.h"
#include "device.h"
#include "dl.h"
#include "get.h"
#include "mopdef.h"
#include "pf.h"
#include "print.h"
#include "rc.h"
#include "log.h"

/*
* The list of all interfaces that are being listened to.
* "selects" on the descriptors in this list.
*/
extern struct if_info *iflist;

__dead static void      Usage(void);
void    mopProcess(struct if_info *, u_char *);

int     AllFlag = 0;            /* listen on "all" interfaces  */
int     DebugFlag = 0;          /* print debugging messages    */
int     Not3Flag = 0;           /* Ignore MOP V3 messages      */
int     Not4Flag = 0;           /* Ignore MOP V4 messages      */
int     promisc = 1;            /* Need promisc mode           */

int
main(int argc, char  **argv)
{
       int     op;
       char   *interface;

       mopInteractive = 1;
       opterr = 0;
       while ((op = getopt(argc, argv, "34ad")) != -1) {
               switch (op) {
               case '3':
                       Not3Flag++;
                       break;
               case '4':
                       Not4Flag++;
                       break;
               case 'a':
                       AllFlag++;
                       break;
               case 'd':
                       DebugFlag++;
                       break;
               default:
                       Usage();
                       /* NOTREACHED */
               }
       }

       interface = argv[optind++];

       if ((AllFlag && interface) ||
           (!AllFlag && interface == 0) ||
           (Not3Flag && Not4Flag))
               Usage();

       if (AllFlag)
               deviceInitAll();
       else
               deviceInitOne(interface);

       Loop();
       /* NOTREACHED */
       return (0);
}

static void
Usage(void)
{
       (void) fprintf(stderr, "usage: %s -a [ -d ] [ -3 | -4 ]\n",
                      getprogname());
       (void) fprintf(stderr, "       %s [ -d ] [ -3 | -4 ] interface\n",
                      getprogname());
       exit(1);
}

/*
* Process incoming packages.
*/
void
mopProcess(struct if_info *ii, u_char *pkt)
{
       int      trans;

       /* We don't known which transport, Guess! */

       trans = mopGetTrans(pkt, 0);

       /* Ok, return if we don't want this message */

       if ((trans == TRANS_ETHER) && Not3Flag) return;
       if ((trans == TRANS_8023) && Not4Flag)  return;

       mopPrintHeader(stdout, pkt, trans);
       mopPrintMopHeader(stdout, pkt, trans);

       mopDumpDL(stdout, pkt, trans);
       mopDumpRC(stdout, pkt, trans);

       fprintf(stdout, "\n");
       fflush(stdout);
}