mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-29 06:47:21 +01:00
3219c922a9
Note: The sources for XNSrouted and routed are being imported to usr.sbin instead of sbin.
352 lines
9.0 KiB
C
352 lines
9.0 KiB
C
/*
|
|
* Copyright (c) 1983, 1988, 1993
|
|
* The Regents of the University of California. 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.
|
|
* 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) 1983, 1988, 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 */
|
|
|
|
/*
|
|
* Routing Table Management Daemon
|
|
*/
|
|
#include "defs.h"
|
|
#include <sys/ioctl.h>
|
|
#include <sys/file.h>
|
|
|
|
#include <net/if.h>
|
|
|
|
#include <sys/errno.h>
|
|
#include <sys/signal.h>
|
|
#include <sys/syslog.h>
|
|
#include "pathnames.h"
|
|
|
|
int supplier = -1; /* process should supply updates */
|
|
int gateway = 0; /* 1 if we are a gateway to parts beyond */
|
|
int debug = 0;
|
|
int bufspace = 127*1024; /* max. input buffer size to request */
|
|
|
|
struct rip *msg = (struct rip *)packet;
|
|
void hup(), rtdeleteall(), sigtrace(), timer();
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
int n, cc, nfd, omask, tflags = 0;
|
|
struct sockaddr from;
|
|
struct timeval *tvp, waittime;
|
|
struct itimerval itval;
|
|
register struct rip *query = msg;
|
|
fd_set ibits;
|
|
u_char retry;
|
|
|
|
argv0 = argv;
|
|
#if BSD >= 43
|
|
openlog("routed", LOG_PID | LOG_ODELAY, LOG_DAEMON);
|
|
setlogmask(LOG_UPTO(LOG_WARNING));
|
|
#else
|
|
openlog("routed", LOG_PID);
|
|
#define LOG_UPTO(x) (x)
|
|
#define setlogmask(x) (x)
|
|
#endif
|
|
sp = getservbyname("router", "udp");
|
|
if (sp == NULL) {
|
|
fprintf(stderr, "routed: router/udp: unknown service\n");
|
|
exit(1);
|
|
}
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = sp->s_port;
|
|
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(AF_INET, SOCK_DGRAM, &addr);
|
|
if (s < 0)
|
|
exit(1);
|
|
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, "-t") == 0) {
|
|
tflags++;
|
|
setlogmask(LOG_UPTO(LOG_DEBUG));
|
|
argv++, argc--;
|
|
continue;
|
|
}
|
|
if (strcmp(*argv, "-d") == 0) {
|
|
debug++;
|
|
setlogmask(LOG_UPTO(LOG_DEBUG));
|
|
argv++, argc--;
|
|
continue;
|
|
}
|
|
if (strcmp(*argv, "-g") == 0) {
|
|
gateway = 1;
|
|
argv++, argc--;
|
|
continue;
|
|
}
|
|
fprintf(stderr,
|
|
"usage: routed [ -s ] [ -q ] [ -t ] [ -g ]\n");
|
|
exit(1);
|
|
}
|
|
|
|
if (debug == 0 && tflags == 0)
|
|
daemon(0, 0);
|
|
/*
|
|
* Any extra argument is considered
|
|
* a tracing log file.
|
|
*/
|
|
if (argc > 0)
|
|
traceon(*argv);
|
|
while (tflags-- > 0)
|
|
bumploglevel();
|
|
|
|
(void) gettimeofday(&now, (struct timezone *)NULL);
|
|
/*
|
|
* Collect an initial view of the world by
|
|
* checking the interface configuration and the gateway kludge
|
|
* file. Then, send a request packet on all
|
|
* directly connected networks to find out what
|
|
* everyone else thinks.
|
|
*/
|
|
rtinit();
|
|
ifinit();
|
|
gwkludge();
|
|
if (gateway > 0)
|
|
rtdefault();
|
|
if (supplier < 0)
|
|
supplier = 0;
|
|
query->rip_cmd = RIPCMD_REQUEST;
|
|
query->rip_vers = RIPVERSION;
|
|
if (sizeof(query->rip_nets[0].rip_dst.sa_family) > 1) /* XXX */
|
|
query->rip_nets[0].rip_dst.sa_family = htons((u_short)AF_UNSPEC);
|
|
else
|
|
query->rip_nets[0].rip_dst.sa_family = AF_UNSPEC;
|
|
query->rip_nets[0].rip_metric = htonl((u_long)HOPCNT_INFINITY);
|
|
toall(sndmsg);
|
|
signal(SIGALRM, timer);
|
|
signal(SIGHUP, hup);
|
|
signal(SIGTERM, hup);
|
|
signal(SIGINT, rtdeleteall);
|
|
signal(SIGUSR1, sigtrace);
|
|
signal(SIGUSR2, sigtrace);
|
|
itval.it_interval.tv_sec = TIMER_RATE;
|
|
itval.it_value.tv_sec = TIMER_RATE;
|
|
itval.it_interval.tv_usec = 0;
|
|
itval.it_value.tv_usec = 0;
|
|
srandom(getpid());
|
|
if (setitimer(ITIMER_REAL, &itval, (struct itimerval *)NULL) < 0)
|
|
syslog(LOG_ERR, "setitimer: %m\n");
|
|
|
|
FD_ZERO(&ibits);
|
|
nfd = s + 1; /* 1 + max(fd's) */
|
|
for (;;) {
|
|
FD_SET(s, &ibits);
|
|
/*
|
|
* If we need a dynamic update that was held off,
|
|
* needupdate will be set, and nextbcast is the time
|
|
* by which we want select to return. Compute time
|
|
* until dynamic update should be sent, and select only
|
|
* until then. If we have already passed nextbcast,
|
|
* just poll.
|
|
*/
|
|
if (needupdate) {
|
|
waittime = nextbcast;
|
|
timevalsub(&waittime, &now);
|
|
if (waittime.tv_sec < 0) {
|
|
waittime.tv_sec = 0;
|
|
waittime.tv_usec = 0;
|
|
}
|
|
if (traceactions)
|
|
fprintf(ftrace,
|
|
"select until dynamic update %d/%d sec/usec\n",
|
|
waittime.tv_sec, waittime.tv_usec);
|
|
tvp = &waittime;
|
|
} else
|
|
tvp = (struct timeval *)NULL;
|
|
n = select(nfd, &ibits, 0, 0, tvp);
|
|
if (n <= 0) {
|
|
/*
|
|
* Need delayed dynamic update if select returned
|
|
* nothing and we timed out. Otherwise, ignore
|
|
* errors (e.g. EINTR).
|
|
*/
|
|
if (n < 0) {
|
|
if (errno == EINTR)
|
|
continue;
|
|
syslog(LOG_ERR, "select: %m");
|
|
}
|
|
omask = sigblock(sigmask(SIGALRM));
|
|
if (n == 0 && needupdate) {
|
|
if (traceactions)
|
|
fprintf(ftrace,
|
|
"send delayed dynamic update\n");
|
|
(void) gettimeofday(&now,
|
|
(struct timezone *)NULL);
|
|
toall(supply, RTS_CHANGED,
|
|
(struct interface *)NULL);
|
|
lastbcast = now;
|
|
needupdate = 0;
|
|
nextbcast.tv_sec = 0;
|
|
}
|
|
sigsetmask(omask);
|
|
continue;
|
|
}
|
|
(void) gettimeofday(&now, (struct timezone *)NULL);
|
|
omask = sigblock(sigmask(SIGALRM));
|
|
#ifdef doesntwork
|
|
/*
|
|
printf("s %d, ibits %x index %d, mod %d, sh %x, or %x &ibits %x\n",
|
|
s,
|
|
ibits.fds_bits[0],
|
|
(s)/(sizeof(fd_mask) * 8),
|
|
((s) % (sizeof(fd_mask) * 8)),
|
|
(1 << ((s) % (sizeof(fd_mask) * 8))),
|
|
ibits.fds_bits[(s)/(sizeof(fd_mask) * 8)] & (1 << ((s) % (sizeof(fd_mask) * 8))),
|
|
&ibits
|
|
);
|
|
*/
|
|
if (FD_ISSET(s, &ibits))
|
|
#else
|
|
if (ibits.fds_bits[s/32] & (1 << s))
|
|
#endif
|
|
process(s);
|
|
/* handle ICMP redirects */
|
|
sigsetmask(omask);
|
|
}
|
|
}
|
|
|
|
timevaladd(t1, t2)
|
|
struct timeval *t1, *t2;
|
|
{
|
|
|
|
t1->tv_sec += t2->tv_sec;
|
|
if ((t1->tv_usec += t2->tv_usec) > 1000000) {
|
|
t1->tv_sec++;
|
|
t1->tv_usec -= 1000000;
|
|
}
|
|
}
|
|
|
|
timevalsub(t1, t2)
|
|
struct timeval *t1, *t2;
|
|
{
|
|
|
|
t1->tv_sec -= t2->tv_sec;
|
|
if ((t1->tv_usec -= t2->tv_usec) < 0) {
|
|
t1->tv_sec--;
|
|
t1->tv_usec += 1000000;
|
|
}
|
|
}
|
|
|
|
process(fd)
|
|
int fd;
|
|
{
|
|
struct sockaddr from;
|
|
int fromlen, cc;
|
|
union {
|
|
char buf[MAXPACKETSIZE+1];
|
|
struct rip rip;
|
|
} inbuf;
|
|
|
|
for (;;) {
|
|
fromlen = sizeof (from);
|
|
cc = recvfrom(fd, &inbuf, sizeof (inbuf), 0, &from, &fromlen);
|
|
if (cc <= 0) {
|
|
if (cc < 0 && errno != EWOULDBLOCK)
|
|
perror("recvfrom");
|
|
break;
|
|
}
|
|
if (fromlen != sizeof (struct sockaddr_in))
|
|
break;
|
|
rip_input(&from, &inbuf.rip, cc);
|
|
}
|
|
}
|
|
|
|
getsocket(domain, type, sin)
|
|
int domain, type;
|
|
struct sockaddr_in *sin;
|
|
{
|
|
int sock, on = 1;
|
|
|
|
if ((sock = socket(domain, type, 0)) < 0) {
|
|
perror("socket");
|
|
syslog(LOG_ERR, "socket: %m");
|
|
return (-1);
|
|
}
|
|
#ifdef SO_BROADCAST
|
|
if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) {
|
|
syslog(LOG_ERR, "setsockopt SO_BROADCAST: %m");
|
|
close(sock);
|
|
return (-1);
|
|
}
|
|
#endif
|
|
#ifdef SO_RCVBUF
|
|
for (on = bufspace; ; on -= 1024) {
|
|
if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
|
|
&on, sizeof (on)) == 0)
|
|
break;
|
|
if (on <= 8*1024) {
|
|
syslog(LOG_ERR, "setsockopt SO_RCVBUF: %m");
|
|
break;
|
|
}
|
|
}
|
|
if (traceactions)
|
|
fprintf(ftrace, "recv buf %d\n", on);
|
|
#endif
|
|
if (bind(sock, (struct sockaddr *)sin, sizeof (*sin)) < 0) {
|
|
perror("bind");
|
|
syslog(LOG_ERR, "bind: %m");
|
|
close(sock);
|
|
return (-1);
|
|
}
|
|
if (fcntl(sock, F_SETFL, O_NONBLOCK) == -1)
|
|
syslog(LOG_ERR, "fcntl O_NONBLOCK: %m\n");
|
|
return (sock);
|
|
}
|