net: tcp: Check TCP ACK flag properly during conn establishment

Multiple flag bits were set so the ACK flag set was not checked properly which meant that connection establishment was not successfull. Fixes #13943 Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
zephyrproject-rtos · Mar 1, 2019 · ea1e4fd · ea1e4fd
1 parent c1f24ab
commit ea1e4fd
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/subsys/net/ip/tcp.c b/subsys/net/ip/tcp.c
@@ -2338,7 +2338,7 @@ NET_CONN_CB(tcp_syn_rcvd)
 	/*
 	 * If we receive ACK, we go to ESTABLISHED state.
 	 */
-	if (NET_TCP_FLAGS(tcp_hdr) == NET_TCP_ACK) {
+	if (NET_TCP_FLAGS(tcp_hdr) & NET_TCP_ACK) {
 		struct net_context *new_context;
 		socklen_t addrlen;
 		int ret;