stun

commit 8b399f7c897721ddb775427007e7edb995d2b425
parent eec0592f5817ff4c6017e75e119f22f3fd6fc030
Author: Quentin Rameau <quinq.ml@gmail.com>
Date:   Mon, 21 Mar 2016 12:38:30 +0100

Explicitely reject combination of -s and -h options

Diffstat:
M
stun.c
 | 
5
+++--

1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/stun.c b/stun.c
@@ -395,7 +395,8 @@ clientsetup(int tunfd)
 void
 usage(void)
 {
-	fprintf(stderr, "usage: %s [-ds] [-h host] [-p port] interface\n", argv0);
+	fprintf(stderr, "usage: %s [-d] -s [-p port] interface\n", argv0);
+	fprintf(stderr, "       %s [-d] -h host [-p port] interface\n", argv0);
 	exit(1);
 }
 
@@ -425,7 +426,7 @@ main(int argc, char *argv[])
 		usage();
 	} ARGEND
 
-	if (argc != 1 || (!sflag && !host))
+	if (argc != 1 || !(sflag ^ (host != NULL)))
 		usage();
 
 	tunfd = opentun(argv[0]);