1 /* $OpenBSD: moptrace.c,v 1.14 2023/03/08 04:43:14 guenther 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 /*
28 * moptrace - MOP Trace Utility
29 *
30 * Usage: moptrace [-3 | -4] [-ad] interface
31 */
32
33 #include "os.h"
34 #include "common/common.h"
35 #include "common/mopdef.h"
36 #include "common/device.h"
37 #include "common/print.h"
38 #include "common/pf.h"
39 #include "common/dl.h"
40 #include "common/rc.h"
41 #include "common/get.h"
42
43 /*
44 * The list of all interfaces that are being listened to.
45 * "selects" on the descriptors in this list.
46 */
47 struct if_info *iflist;
48
49 void Usage(void);
50 void mopProcess(struct if_info *, u_char *);
51
52 int AllFlag = 0; /* listen on "all" interfaces */
53 int DebugFlag = 0; /* print debugging messages */
54 int Not3Flag = 0; /* Ignore MOP V3 messages */
55 int Not4Flag = 0; /* Ignore MOP V4 messages */
56 int promisc = 1; /* Need promisc mode */
57 extern char *__progname;
58
59 int
main(int argc,char * argv[])60 main(int argc, char *argv[])
61 {
62 int op;
63 char *interface;
64
65 /* All error reporting is done through syslogs. */
66 openlog(__progname, LOG_PID | LOG_CONS, LOG_DAEMON);
67
68 opterr = 0;
69 while ((op = getopt(argc, argv, "34ad")) != -1) {
70 switch (op) {
71 case '3':
72 Not3Flag = 1;
73 break;
74 case '4':
75 Not4Flag = 1;
76 break;
77 case 'a':
78 AllFlag = 1;
79 break;
80 case 'd':
81 DebugFlag++;
82 break;
83 default:
84 Usage();
85 /* NOTREACHED */
86 }
87 }
88
89 interface = argv[optind++];
90
91 if ((AllFlag && interface) ||
92 (!AllFlag && interface == 0) ||
93 (Not3Flag && Not4Flag))
94 Usage();
95
96 if (AllFlag)
97 deviceInitAll();
98 else
99 deviceInitOne(interface);
100
101 Loop();
102 /* NOTREACHED */
103 }
104
105 void
Usage()106 Usage()
107 {
108 fprintf(stderr, "usage: %s [-3 | -4] [-ad] interface\n", __progname);
109 exit(1);
110 }
111
112 /*
113 * Process incoming packages.
114 */
115 void
mopProcess(struct if_info * ii,u_char * pkt)116 mopProcess(struct if_info *ii, u_char *pkt)
117 {
118 int trans;
119
120 /* We don't known which transport, Guess! */
121
122 trans = mopGetTrans(pkt, 0);
123
124 /* Ok, return if we don't want this message */
125
126 if ((trans == TRANS_ETHER) && Not3Flag) return;
127 if ((trans == TRANS_8023) && Not4Flag) return;
128
129 fprintf(stdout, "Interface : %s", ii->if_name);
130 mopPrintHeader(stdout, pkt, trans);
131 mopPrintMopHeader(stdout, pkt, trans);
132
133 mopDumpDL(stdout, pkt, trans);
134 mopDumpRC(stdout, pkt, trans);
135
136 fprintf(stdout, "\n");
137 fflush(stdout);
138 }
139