GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/mopd/mopd/mopd.c Lines: 0 67 0.0 %
Date: 2017-11-13 Branches: 0 48 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: mopd.c,v 1.19 2015/02/09 23:00:14 deraadt Exp $ */
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/*
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 * Copyright (c) 1993-96 Mats O Jansson.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/*
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 * mopd - MOP Dump/Load Daemon
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 *
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 * Usage:	mopd [-3 | -4] [-adfv] interface
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 */
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#include "os.h"
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#include "common/common.h"
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#include "common/mopdef.h"
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#include "common/device.h"
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#include "common/print.h"
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#include "common/pf.h"
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#include "common/cmp.h"
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#include "common/get.h"
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#include "common/dl.h"
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#include "common/rc.h"
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#include "process.h"
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#include "pwd.h"
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/*
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 * The list of all interfaces that are being listened to.
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 * "selects" on the descriptors in this list.
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 */
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struct if_info	*iflist;
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void		Usage(void);
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void		mopProcess(struct if_info *, u_char *);
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int	 AllFlag = 0;		/* listen on "all" interfaces */
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int	 DebugFlag = 0;		/* print debugging messages   */
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int	 ForegroundFlag = 0;	/* run in foreground          */
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int	 VersionFlag = 0;	/* print version              */
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int	 Not3Flag = 0;		/* Not MOP V3 messages.       */
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int	 Not4Flag = 0;		/* Not MOP V4 messages.       */
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int	 promisc = 1;		/* Need promisc mode    */
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extern char *__progname;
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int
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main(int argc, char *argv[])
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{
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	int		 c;
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	char		*interface;
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	struct passwd	*pw;
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	extern char version[];
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	while ((c = getopt(argc, argv, "34adfv")) != -1)
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		switch (c) {
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		case '3':
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			Not3Flag = 1;
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			break;
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		case '4':
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			Not4Flag = 1;
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			break;
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		case 'a':
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			AllFlag = 1;
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			break;
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		case 'd':
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			DebugFlag++;
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			break;
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		case 'f':
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			ForegroundFlag = 1;
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			break;
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		case 'v':
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			VersionFlag = 1;
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			break;
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		default:
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			Usage();
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			/* NOTREACHED */
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		}
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	if (VersionFlag) {
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		fprintf(stdout,"%s: version %s\n", __progname, version);
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		exit(0);
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	}
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	interface = argv[optind++];
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	if ((AllFlag && interface) || (!AllFlag && interface == 0) ||
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	    (argc > optind) || (Not3Flag && Not4Flag))
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		Usage();
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	/* All error reporting is done through syslogs. */
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	openlog(__progname, LOG_PID | LOG_CONS, LOG_DAEMON);
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	tzset();
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	if ((pw = getpwnam("_mopd")) == NULL)
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		err(1, "getpwnam");
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	if ((!ForegroundFlag) && DebugFlag)
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		fprintf(stdout, "%s: not running as daemon, -d given.\n",
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		    __progname);
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	if ((!ForegroundFlag) && (!DebugFlag))
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		if (daemon(0, 0) == -1)
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			err(1, NULL);
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	syslog(LOG_INFO, "%s %s started.", __progname, version);
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	if (AllFlag)
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		deviceInitAll();
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	else
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		deviceInitOne(interface);
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	if (chroot(MOP_FILE_PATH) == -1) {
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		syslog(LOG_CRIT, "chroot %s: %m", MOP_FILE_PATH);
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		exit(1);
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	}
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	if (chdir("/") == -1) {
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		syslog(LOG_CRIT, "chdir(\"/\"): %m");
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		exit(1);
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	}
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	if (setgroups(1, &pw->pw_gid) ||
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	    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
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	    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) {
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		syslog(LOG_CRIT, "can't drop privileges: %m");
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		exit(1);
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	}
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	endpwent();
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	Loop();
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	/* NOTREACHED */
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}
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void
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Usage()
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{
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	fprintf(stderr, "usage: %s [-3 | -4] [-adfv] interface\n",
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	    __progname);
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	exit(1);
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}
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/*
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 * Process incoming packages.
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 */
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void
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mopProcess(struct if_info *ii, u_char *pkt)
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{
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	u_char	*dst, *src;
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	u_short  ptype;
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	int	 idx, trans, len;
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	/* We don't known with transport, Guess! */
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	trans = mopGetTrans(pkt, 0);
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	/* Ok, return if we don't wan't this message */
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	if ((trans == TRANS_ETHER) && Not3Flag) return;
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	if ((trans == TRANS_8023) && Not4Flag)	return;
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	idx = 0;
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	mopGetHeader(pkt, &idx, &dst, &src, &ptype, &len, trans);
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	/*
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	 * Ignore our own transmissions
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	 *
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	 */
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	if (mopCmpEAddr(ii->eaddr,src) == 0)
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		return;
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	switch (ptype) {
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	case MOP_K_PROTO_DL:
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		mopProcessDL(stdout, ii, pkt, &idx, dst, src, trans, len);
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		break;
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	case MOP_K_PROTO_RC:
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		mopProcessRC(stdout, ii, pkt, &idx, dst, src, trans, len);
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		break;
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	default:
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		break;
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	}
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}