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/* $OpenBSD: loop.c,v 1.4 2003/06/02 21:38:40 maja Exp $ */
/*
* 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 char rcsid[] = "$OpenBSD: loop.c,v 1.4 2003/06/02 21:38:40 maja Exp $";
#endif
#include "os.h"
#include "common/common.h"
#include "common/mopdef.h"
/*
* The list of all interfaces that are being listened to. loop()
* "selects" on the descriptors in this list.
*/
struct if_info *iflist;
u_char buf[BUFSIZE];
void mopProcess (/* struct if_info *, u_char * */);
int
mopOpenRC(p, trans)
struct if_info *p;
int trans;
{
#ifndef NORC
int fd;
fd = (*(p->iopen))(p->if_name,
O_RDWR,
MOP_K_PROTO_RC,
trans);
if (fd >= 0) {
pfAddMulti(fd, p->if_name, rc_mcst);
pfEthAddr(fd, p->eaddr);
}
return fd;
#else
return -1;
#endif
}
int
mopOpenDL(p, trans)
struct if_info *p;
int trans;
{
#ifndef NODL
int fd;
fd = (*(p->iopen))(p->if_name,
O_RDWR,
MOP_K_PROTO_DL,
trans);
if (fd >= 0) {
pfAddMulti(fd, p->if_name, dl_mcst);
pfEthAddr(fd, p->eaddr);
}
return fd;
#else
return -1;
#endif
}
void
mopReadRC(p, fd)
struct if_info *p;
int fd;
{
int cc;
if ((cc = pfRead(fd, buf+HDRSIZ, BUFSIZE-HDRSIZ)) < 0) {
return;
}
if (cc == 0)
return;
mopProcess(p, buf+HDRSIZ);
return;
}
void
mopReadDL(p, fd)
struct if_info *p;
int fd;
{
int cc;
if ((cc = pfRead(fd, buf+HDRSIZ, BUFSIZE-HDRSIZ)) < 0) {
return;
}
if (cc == 0)
return;
mopProcess(p, buf+HDRSIZ);
return;
}
/*
* Loop indefinitely listening for MOP requests on the
* interfaces in 'iflist'.
*/
void
Loop()
{
fd_set fds, listeners;
int maxfd = 0;
struct if_info *ii;
if (iflist == 0) {
fprintf(stderr,"no interfaces");
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) {
fprintf(stderr, "select: %s");
exit(0);
}
for (ii = iflist; ii; ii = ii->next) {
if (ii->fd != -1) {
if (FD_ISSET(ii->fd, &listeners))
(*(ii->read))(ii,ii->fd);
}
}
}
}
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