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Allow specification of which source address to use for encapsulation.

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PR:		25847
Submitted by:	Eugene Polovnikov <eugene@brain-fag.org>
This commit is contained in:
Poul-Henning Kamp 2001-03-28 17:30:26 +00:00
parent 944adaa6c0
commit 6d4a212d49
1 changed files with 18 additions and 3 deletions
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21
sbin/nos-tun/nos-tun.c
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@ -239,11 +239,13 @@ int main (int argc, char **argv)
char *point_to = NULL;
char *to_point = NULL;
char *target;
char *source = NULL;
char *protocol = NULL;
int protnum;
struct sockaddr t_laddr; /* Source address of tunnel */
struct sockaddr whereto; /* Destination of tunnel */
struct sockaddr wherefrom; /* Source of tunnel */
struct sockaddr_in *to;
char buf[0x2000]; /* Packets buffer */
@ -272,7 +274,7 @@ int main (int argc, char **argv)
argc -= optind;
argv += optind;
if (argc != 1 || (devname == NULL) ||
if ((argc != 1 && argc != 2) || (devname == NULL) ||
(point_to == NULL) || (to_point == NULL)) {
usage();
}
@ -282,7 +284,11 @@ int main (int argc, char **argv)
else
protnum = atoi(protocol);
target = *argv;
if (argc == 1) {
target = *argv;
} else {
source = *argv++; target = *argv;
}
/* Establish logging through 'syslog' */
openlog("nos-tun", LOG_PID, LOG_DAEMON);
@ -306,6 +312,15 @@ int main (int argc, char **argv)
Finish(5);
}
if (source) {
if (Set_address(source, (struct sockaddr_in *)&wherefrom))
Finish(9);
if (bind(net, &wherefrom, sizeof(wherefrom)) < 0) {
syslog(LOG_ERR, "can't bind source address - %m");
Finish(10);
}
}
if (connect(net,&whereto,sizeof(struct sockaddr_in)) < 0 ) {
syslog(LOG_ERR,"can't connect to target - %m");
close(net);
@ -365,7 +380,7 @@ static void
usage()
{
fprintf(stderr,
"usage: nos-tun -t <tun_name> -s <source_addr> -d <dest_addr> -p <protocol_number> <target_addr>\n");
"usage: nos-tun -t <tun_name> -s <source_addr> -d <dest_addr> -p <protocol_number> [<source_addr>] <target_addr>\n");
exit(1);
}