GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/mopd/mopchk/../common/loop-bsd.c Lines: 0 43 0.0 %
Date: 2017-11-07 Branches: 0 36 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: loop-bsd.c,v 1.13 2009/10/27 23:59:52 deraadt Exp $ */
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/*
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 * Copyright (c) 1993-95 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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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#if defined(__bsdi__) || defined(__FreeBSD__)
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#include <sys/time.h>
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#endif
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#include <net/bpf.h>
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#include <sys/ioctl.h>
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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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int
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mopOpenRC(struct if_info *p, int trans)
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{
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#ifndef NORC
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	return (*(p->iopen))(p->if_name, O_RDWR, MOP_K_PROTO_RC, trans);
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#else
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	return (-1);
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#endif
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}
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int
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mopOpenDL(struct if_info *p, int trans)
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{
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#ifndef NODL
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	return (*(p->iopen))(p->if_name, O_RDWR, MOP_K_PROTO_DL, trans);
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#else
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	return (-1);
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#endif
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}
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void
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mopReadRC(void)
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{
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}
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void
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mopReadDL(void)
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{
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}
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/*
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 * The list of all interfaces that are being listened to.  loop()
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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   mopProcess(struct if_info *, u_char *);
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/*
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 * Loop indefinitely listening for MOP requests on the
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 * interfaces in 'iflist'.
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 */
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void
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Loop(void)
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{
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	u_char		*buf, *bp, *ep;
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	int		 cc;
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	fd_set		 fds, listeners;
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	int		 bufsize, maxfd = 0;
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	struct if_info	*ii;
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	if (iflist == 0) {
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		syslog(LOG_ERR, "no interfaces");
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		exit(0);
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	}
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	if (iflist->fd != -1)
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		if (ioctl(iflist->fd, BIOCGBLEN, (caddr_t)&bufsize) < 0) {
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			syslog(LOG_ERR, "BIOCGBLEN: %m");
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			exit(0);
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		}
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	buf = malloc(bufsize);
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	if (buf == 0) {
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		syslog(LOG_ERR, "malloc: %m");
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		exit(0);
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	}
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	/*
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         * Find the highest numbered file descriptor for select().
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         * Initialize the set of descriptors to listen to.
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         */
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	FD_ZERO(&fds);
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	for (ii = iflist; ii; ii = ii->next)
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		if (ii->fd != -1) {
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			FD_SET(ii->fd, &fds);
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			if (ii->fd > maxfd)
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				maxfd = ii->fd;
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		}
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	while (1) {
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		listeners = fds;
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		if (select(maxfd + 1, &listeners, NULL, NULL, NULL) < 0) {
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			syslog(LOG_ERR, "select: %m");
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			exit(0);
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		}
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		for (ii = iflist; ii; ii = ii->next)
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			if (ii->fd != -1) {
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				if (!FD_ISSET(ii->fd, &listeners))
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					continue;
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again:
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			cc = read(ii->fd, buf, bufsize);
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			/* Don't choke when we get ptraced */
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			if (cc < 0 && errno == EINTR)
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				goto again;
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			/* Due to a SunOS bug, after 2^31 bytes, the file
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			 * offset overflows and read fails with EINVAL.  The
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			 * lseek() to 0 will fix things. */
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			if (cc < 0) {
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				if (errno == EINVAL && (lseek(ii->fd, 0,
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				    SEEK_CUR) + bufsize) < 0) {
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					lseek(ii->fd, 0, SEEK_SET);
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					goto again;
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				}
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				syslog(LOG_ERR, "read: %m");
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				exit(0);
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			}
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			/* Loop through the packet(s) */
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#define bhp ((struct bpf_hdr *)bp)
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			bp = buf;
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			ep = bp + cc;
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			while (bp < ep) {
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				int caplen, hdrlen;
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				caplen = bhp->bh_caplen;
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				hdrlen = bhp->bh_hdrlen;
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				mopProcess(ii, bp + hdrlen);
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				bp += BPF_WORDALIGN(hdrlen + caplen);
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			}
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		}
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	}
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}