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/*
* Copyright (c) 1993-95 Mats O Jansson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef LINT
static const char rcsid[] = "$Id: loop-linux2.c,v 1.5 2005/12/21 01:40:24 millert Exp $";
#endif
#include <errno.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
#if defined(__bsdi__) || defined(__FreeBSD__)
#include <sys/time.h>
#endif
#include <sys/ioctl.h>
#include "os.h"
#include "common/common.h"
#include "common/mopdef.h"
int
mopOpenRC(p, trans)
struct if_info *p;
int trans;
{
#ifndef NORC
return (*(p->iopen))(p->if_name,
O_RDWR,
MOP_K_PROTO_RC,
trans);
#else
return -1;
#endif
}
int
mopOpenDL(p, trans)
struct if_info *p;
int trans;
{
#ifndef NODL
return (*(p->iopen))(p->if_name,
O_RDWR,
MOP_K_PROTO_DL,
trans);
#else
return -1;
#endif
}
void
mopReadRC()
{
}
void
mopReadDL()
{
}
/*
* The list of all interfaces that are being listened to. loop()
* "selects" on the descriptors in this list.
*/
struct if_info *iflist;
void mopProcess(struct if_info *, u_char *);
/*
* Loop indefinitely listening for MOP requests on the
* interfaces in 'iflist'.
*/
void
Loop()
{
u_char *buf, *bp, *ep;
int cc;
fd_set fds, listeners;
int bufsize = 1100, maxfd =0;
struct if_info *ii;
/* FIXME : this is a hack, for some reason specifying an interface would
* cause it to fail because bufsize is an impossible number, so I added a
* sanity check because I'm too lazy to figure out why. -- Karl
*/
if (bufsize > 1100)
bufsize = 64;
if (iflist == 0) {
syslog(LOG_ERR, "no interfaces");
exit(0);
}
buf = (u_char *) malloc((unsigned) bufsize);
if (buf == 0) {
syslog(LOG_ERR, "malloc: %m");
exit(0);
}
/*
* Find the highest numbered file descriptor for select().
* Initialize the set of descriptors to listen to.
*/
FD_ZERO(&fds);
for (ii = iflist; ii; ii = ii->next) {
if (ii->fd != -1) {
FD_SET(ii->fd, &fds);
if (ii->fd > maxfd)
maxfd = ii->fd;
}
}
while (1) {
listeners = fds;
if (select(maxfd + 1, &listeners, (fd_set *) 0,
(fd_set *) 0, (struct timeval *) 0) < 0) {
syslog(LOG_ERR, "select: %m");
exit(0);
}
for (ii = iflist; ii; ii = ii->next) {
if (ii->fd != -1) {
if (!FD_ISSET(ii->fd, &listeners))
continue;
}
again:
cc = read(ii->fd, (char *) buf, bufsize);
/* Don't choke when we get ptraced */
if (cc < 0 && errno == EINTR)
goto again;
bp = buf;
ep = bp + cc;
if(bp < ep)
{
mopProcess(ii,buf);
}
}
}
}
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