1/*	$NetBSD: mopd.c,v 1.17 2022/05/28 21:14:57 andvar Exp $	*/
2
3/*
4 * Copyright (c) 1993-96 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#include "port.h"
27#ifndef lint
28__RCSID("$NetBSD: mopd.c,v 1.17 2022/05/28 21:14:57 andvar Exp $");
29#endif
30
31/*
32 * mopd - MOP Dump/Load Daemon
33 *
34 * Usage:	mopd -a [ -d -f -v ] [ -3 | -4 ]
35 *		mopd [ -d -f -v ] [ -3 | -4 ] interface
36 */
37
38#include "os.h"
39#include "cmp.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 "process.h"
48#include "rc.h"
49
50/*
51 * The list of all interfaces that are being listened to.
52 * "selects" on the descriptors in this list.
53 */
54extern struct if_info *iflist;
55
56__dead static void	Usage(void);
57void	mopProcess(struct if_info *, u_char *);
58
59int     AllFlag = 0;		/* listen on "all" interfaces */
60int     DebugFlag = 0;		/* print debugging messages   */
61int	ForegroundFlag = 0;	/* run in foreground          */
62int	VersionFlag = 0;	/* print version              */
63int	Not3Flag = 0;		/* Not MOP V3 messages.       */
64int	Not4Flag = 0;		/* Not MOP V4 messages.       */
65int	promisc = 1;		/* Need promisc mode    */
66const char *MopdDir = MOP_FILE_PATH;  /* Path to mop directory  */
67
68int
69main(int argc, char  **argv)
70{
71	int	c, pid;
72
73	extern char version[];
74
75	while ((c = getopt(argc, argv, "34adfs:v")) != -1) {
76		switch (c) {
77			case '3':
78				Not3Flag++;
79				break;
80			case '4':
81				Not4Flag++;
82				break;
83			case 'a':
84				AllFlag++;
85				break;
86			case 'd':
87				DebugFlag++;
88				break;
89			case 'f':
90				ForegroundFlag++;
91				break;
92			case 's':
93				MopdDir = optarg;
94				break;
95			case 'v':
96				VersionFlag++;
97				break;
98			default:
99				Usage();
100				/* NOTREACHED */
101		}
102	}
103	argc -= optind;
104	argv += optind;
105
106	if (VersionFlag) {
107		fprintf(stdout,"%s: version %s\n", getprogname(), version);
108		exit(0);
109	}
110
111	if ((AllFlag && argc != 0) || (!AllFlag && argc == 0) ||
112	    (Not3Flag && Not4Flag))
113		Usage();
114
115	/* All error reporting is done through syslogs. */
116	openlog("mopd", LOG_PID, LOG_DAEMON);
117
118	if ((!ForegroundFlag) && DebugFlag)
119		fprintf(stdout,
120		    "%s: not running as daemon, -d given.\n", getprogname());
121
122	if ((!ForegroundFlag) && (!DebugFlag)) {
123		pid = fork();
124		if (pid > 0)
125			/* Parent exits, leaving child in background. */
126			exit(0);
127		else
128			if (pid == -1) {
129				syslog(LOG_ERR, "cannot fork");
130				exit(0);
131			}
132
133		/* Fade into the background */
134		daemon(0, 0);
135		pidfile(NULL);
136	}
137
138	syslog(LOG_INFO, "%s %s started.", getprogname(), version);
139
140	if (AllFlag)
141 		deviceInitAll();
142	else {
143		while (argc--)
144			deviceInitOne(*argv++);
145	}
146
147	Loop();
148	/* NOTREACHED */
149	return (0);
150}
151
152static void
153Usage(void)
154{
155	(void) fprintf(stderr, "usage: %s -a [ -d -f -v ] [ -3 | -4 ]\n",
156	    getprogname());
157	(void) fprintf(stderr, "       %s [ -d -f -v ] [ -3 | -4 ]\n",
158	    getprogname());
159	(void) fprintf(stderr, "           interface [...]\n");
160	exit(1);
161}
162
163/*
164 * Process incoming packages.
165 */
166void
167mopProcess(struct if_info *ii, u_char *pkt)
168{
169	const u_char	*dst, *src;
170	u_short  ptype;
171	int	 idx, trans, len;
172
173	/* We don't known with transport, Guess! */
174
175	trans = mopGetTrans(pkt, 0);
176
177	/* Ok, return if we don't wan't this message */
178
179	if ((trans == TRANS_ETHER) && Not3Flag) return;
180	if ((trans == TRANS_8023) && Not4Flag)	return;
181
182	idx = 0;
183	mopGetHeader(pkt, &idx, &dst, &src, &ptype, &len, trans);
184
185	/*
186	 * Ignore our own transmissions
187	 *
188	 */
189	if (mopCmpEAddr(ii->eaddr,src) == 0)
190		return;
191
192	switch(ptype) {
193	case MOP_K_PROTO_DL:
194		mopProcessDL(stdout, ii, pkt, &idx, dst, src, trans, len);
195		break;
196	case MOP_K_PROTO_RC:
197		mopProcessRC(stdout, ii, pkt, &idx, dst, src, trans, len);
198		break;
199	default:
200		break;
201	}
202}
203