freebsd-dev/usr.sbin/XNSrouted/main.c
Rodney W. Grimes 3219c922a9 BSD 4.4 Lite sbin -> usr.sbin Sources
Note: The sources for XNSrouted and routed are being imported to usr.sbin
instead of sbin.
1994-05-26 06:39:07 +00:00

256 lines
6.5 KiB
C

/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* This file includes significant work done at Cornell University by
* Bill Nesheim. That work included by permission.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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 copyright[] =
"@(#) Copyright (c) 1985, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/5/93";
#endif /* not lint */
/*
* XNS Routing Information Protocol Daemon
*/
#include "defs.h"
#include <sys/time.h>
#include <net/if.h>
#include <errno.h>
#include <nlist.h>
#include <signal.h>
#include <paths.h>
int supplier = -1; /* process should supply updates */
extern int gateway;
struct rip *msg = (struct rip *) &packet[sizeof (struct idp)];
void hup(), fkexit(), timer();
main(argc, argv)
int argc;
char *argv[];
{
int cc;
struct sockaddr from;
u_char retry;
argv0 = argv;
argv++, argc--;
while (argc > 0 && **argv == '-') {
if (strcmp(*argv, "-s") == 0) {
supplier = 1;
argv++, argc--;
continue;
}
if (strcmp(*argv, "-q") == 0) {
supplier = 0;
argv++, argc--;
continue;
}
if (strcmp(*argv, "-R") == 0) {
noteremoterequests++;
argv++, argc--;
continue;
}
if (strcmp(*argv, "-t") == 0) {
tracepackets++;
argv++, argc--;
ftrace = stderr;
tracing = 1;
continue;
}
if (strcmp(*argv, "-g") == 0) {
gateway = 1;
argv++, argc--;
continue;
}
if (strcmp(*argv, "-l") == 0) {
gateway = -1;
argv++, argc--;
continue;
}
fprintf(stderr,
"usage: xnsrouted [ -s ] [ -q ] [ -t ] [ -g ] [ -l ]\n");
exit(1);
}
#ifndef DEBUG
if (!tracepackets)
daemon(0, 0);
#endif
openlog("XNSrouted", LOG_PID, LOG_DAEMON);
addr.sns_family = AF_NS;
addr.sns_len = sizeof(addr);
addr.sns_port = htons(IDPPORT_RIF);
ns_anynet.s_net[0] = ns_anynet.s_net[1] = -1;
ns_netmask.sns_addr.x_net = ns_anynet;
ns_netmask.sns_len = 6;
r = socket(AF_ROUTE, SOCK_RAW, 0);
/* later, get smart about lookingforinterfaces */
if (r)
shutdown(r, 0); /* for now, don't want reponses */
else {
fprintf(stderr, "routed: no routing socket\n");
exit(1);
}
s = getsocket(SOCK_DGRAM, 0, &addr);
if (s < 0)
exit(1);
/*
* Any extra argument is considered
* a tracing log file.
*/
if (argc > 0)
traceon(*argv);
/*
* Collect an initial view of the world by
* snooping in the kernel. Then, send a request packet on all
* directly connected networks to find out what
* everyone else thinks.
*/
rtinit();
ifinit();
if (supplier < 0)
supplier = 0;
/* request the state of the world */
msg->rip_cmd = htons(RIPCMD_REQUEST);
msg->rip_nets[0].rip_dst = ns_anynet;
msg->rip_nets[0].rip_metric = htons(HOPCNT_INFINITY);
toall(sndmsg);
signal(SIGALRM, timer);
signal(SIGHUP, hup);
signal(SIGINT, hup);
signal(SIGEMT, fkexit);
timer();
for (;;)
process(s);
}
process(fd)
int fd;
{
struct sockaddr from;
int fromlen = sizeof (from), cc, omask;
struct idp *idp = (struct idp *)packet;
cc = recvfrom(fd, packet, sizeof (packet), 0, &from, &fromlen);
if (cc <= 0) {
if (cc < 0 && errno != EINTR)
syslog(LOG_ERR, "recvfrom: %m");
return;
}
if (tracepackets > 1 && ftrace) {
fprintf(ftrace,"rcv %d bytes on %s ", cc, xns_ntoa(&idp->idp_dna));
fprintf(ftrace," from %s\n", xns_ntoa(&idp->idp_sna));
}
if (noteremoterequests && !ns_neteqnn(idp->idp_sna.x_net, ns_zeronet)
&& !ns_neteq(idp->idp_sna, idp->idp_dna))
{
syslog(LOG_ERR,
"net of interface (%s) != net on ether (%s)!\n",
xns_nettoa(idp->idp_dna.x_net),
xns_nettoa(idp->idp_sna.x_net));
}
/* We get the IDP header in front of the RIF packet*/
cc -= sizeof (struct idp);
#define mask(s) (1<<((s)-1))
omask = sigblock(mask(SIGALRM));
rip_input(&from, cc);
sigsetmask(omask);
}
getsocket(type, proto, sns)
int type, proto;
struct sockaddr_ns *sns;
{
int domain = sns->sns_family;
int retry, s, on = 1;
retry = 1;
while ((s = socket(domain, type, proto)) < 0 && retry) {
syslog(LOG_ERR, "socket: %m");
sleep(5 * retry);
retry <<= 1;
}
if (retry == 0)
return (-1);
while (bind(s, (struct sockaddr *)sns, sizeof (*sns)) < 0 && retry) {
syslog(LOG_ERR, "bind: %m");
sleep(5 * retry);
retry <<= 1;
}
if (retry == 0)
return (-1);
if (domain==AF_NS) {
struct idp idp;
if (setsockopt(s, 0, SO_HEADERS_ON_INPUT, &on, sizeof(on))) {
syslog(LOG_ERR, "setsockopt SEE HEADERS: %m");
exit(1);
}
idp.idp_pt = NSPROTO_RI;
if (setsockopt(s, 0, SO_DEFAULT_HEADERS, &idp, sizeof(idp))) {
syslog(LOG_ERR, "setsockopt SET HEADER: %m");
exit(1);
}
}
if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m");
exit(1);
}
return (s);
}
/*
* Fork and exit on EMT-- for profiling.
*/
void
fkexit()
{
if (fork() == 0)
exit(0);
}