stun

commit 9304dd3be2fde7c9ebc83df00aefa405a6900af9
parent d9197eccf82c172461f7428d6be74cb040c7a4a6
Author: sin <sin@2f30.org>
Date:   Thu, 24 Mar 2016 11:08:20 +0000

client should also challenge server

thanks rain1

Diffstat:
M
stun.c
 | 
20
+++++++++++++++++++-

1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/stun.c b/stun.c
@@ -546,10 +546,19 @@ serversetup(int devfd)
 
 		setsockopt(netfd, IPPROTO_TCP, TCP_NODELAY, (int []){1}, sizeof(int));
 
+		/* challenge client */
 		ret = challenge(netfd);
 		if (ret < 0) {
+			close(netfd);
 			logwarn("challenge-response failed");
+			continue;
+		}
+
+		/* respond to client's challenge */
+		ret = response(netfd);
+		if (ret < 0) {
 			close(netfd);
+			logwarn("challenge-response failed");
 			continue;
 		}
 
@@ -594,10 +603,19 @@ clientsetup(int devfd)
 
 	setsockopt(netfd, IPPROTO_TCP, TCP_NODELAY, (int []){1}, sizeof(int));
 
+	/* respond to server's challenge */
 	ret = response(netfd);
 	if (ret < 0) {
 		close(netfd);
-		logwarn("failed to respond to challenge");
+		logwarn("challenge-response failed");
+		return -1;
+	}
+
+	/* challenge server */
+	ret = challenge(netfd);
+	if (ret < 0) {
+		close(netfd);
+		logwarn("challenge-response failed");
 		return -1;
 	}