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      1 /*	$NetBSD: moptrace.c,v 1.13 2020/04/22 23:57:56 joerg Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1993-95 Mats O Jansson.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "port.h"
     28 #ifndef lint
     29 __RCSID("$NetBSD: moptrace.c,v 1.13 2020/04/22 23:57:56 joerg Exp $");
     30 #endif
     31 
     32 /*
     33  * moptrace - MOP Trace Utility
     34  *
     35  * Usage:	moptrace -a [ -d ] [ -3 | -4 ]
     36  *		moptrace [ -d ] [ -3 | -4 ] interface
     37  */
     38 
     39 #include "os.h"
     40 #include "common.h"
     41 #include "device.h"
     42 #include "dl.h"
     43 #include "get.h"
     44 #include "mopdef.h"
     45 #include "pf.h"
     46 #include "print.h"
     47 #include "rc.h"
     48 #include "log.h"
     49 
     50 /*
     51  * The list of all interfaces that are being listened to.
     52  * "selects" on the descriptors in this list.
     53  */
     54 extern struct if_info *iflist;
     55 
     56 __dead static void	Usage(void);
     57 void	mopProcess(struct if_info *, u_char *);
     58 
     59 int     AllFlag = 0;		/* listen on "all" interfaces  */
     60 int     DebugFlag = 0;		/* print debugging messages    */
     61 int	Not3Flag = 0;		/* Ignore MOP V3 messages      */
     62 int	Not4Flag = 0;		/* Ignore MOP V4 messages      */
     63 int	promisc = 1;		/* Need promisc mode           */
     64 
     65 int
     66 main(int argc, char  **argv)
     67 {
     68 	int     op;
     69 	char   *interface;
     70 
     71 	mopInteractive = 1;
     72 	opterr = 0;
     73 	while ((op = getopt(argc, argv, "34ad")) != -1) {
     74 		switch (op) {
     75 		case '3':
     76 			Not3Flag++;
     77 			break;
     78 		case '4':
     79 			Not4Flag++;
     80 			break;
     81 		case 'a':
     82 			AllFlag++;
     83 			break;
     84 		case 'd':
     85 			DebugFlag++;
     86 			break;
     87 		default:
     88 			Usage();
     89 			/* NOTREACHED */
     90 		}
     91 	}
     92 
     93 	interface = argv[optind++];
     94 
     95 	if ((AllFlag && interface) ||
     96 	    (!AllFlag && interface == 0) ||
     97 	    (Not3Flag && Not4Flag))
     98 		Usage();
     99 
    100 	if (AllFlag)
    101  		deviceInitAll();
    102 	else
    103 		deviceInitOne(interface);
    104 
    105 	Loop();
    106 	/* NOTREACHED */
    107 	return (0);
    108 }
    109 
    110 static void
    111 Usage(void)
    112 {
    113 	(void) fprintf(stderr, "usage: %s -a [ -d ] [ -3 | -4 ]\n",
    114 		       getprogname());
    115 	(void) fprintf(stderr, "       %s [ -d ] [ -3 | -4 ] interface\n",
    116 		       getprogname());
    117 	exit(1);
    118 }
    119 
    120 /*
    121  * Process incoming packages.
    122  */
    123 void
    124 mopProcess(struct if_info *ii, u_char *pkt)
    125 {
    126 	int	 trans;
    127 
    128 	/* We don't known which transport, Guess! */
    129 
    130 	trans = mopGetTrans(pkt, 0);
    131 
    132 	/* Ok, return if we don't want this message */
    133 
    134 	if ((trans == TRANS_ETHER) && Not3Flag) return;
    135 	if ((trans == TRANS_8023) && Not4Flag)	return;
    136 
    137 	mopPrintHeader(stdout, pkt, trans);
    138 	mopPrintMopHeader(stdout, pkt, trans);
    139 
    140 	mopDumpDL(stdout, pkt, trans);
    141 	mopDumpRC(stdout, pkt, trans);
    142 
    143 	fprintf(stdout, "\n");
    144 	fflush(stdout);
    145 }
    146