tcp: keep closing sockets in CLOSING

F/1776

Author: danielinux

src/test/unit/unit_tests_proto.c

@@ -621,7 +621,7 @@ START_TEST(test_tcp_sock_close_state_transitions)
 
     ts->sock.tcp.state = TCP_CLOSING;
     ck_assert_int_eq(wolfIP_sock_close(&s, sd), -WOLFIP_EAGAIN);
-    ck_assert_int_eq(ts->sock.tcp.state, TCP_TIME_WAIT);
+    ck_assert_int_eq(ts->sock.tcp.state, TCP_CLOSING);
 
     ts->sock.tcp.state = TCP_LISTEN;
     ck_assert_int_eq(wolfIP_sock_close(&s, sd), 0);

src/wolfip.c

@@ -5082,7 +5082,6 @@ int wolfIP_sock_close(struct wolfIP *s, int sockfd)
             tcp_ctrl_rto_start(ts, s->last_tick);
             return -WOLFIP_EAGAIN;
         } else if (ts->sock.tcp.state == TCP_CLOSING) {
-            ts->sock.tcp.state = TCP_TIME_WAIT;
             return -WOLFIP_EAGAIN;
         } else if (ts->sock.tcp.state == TCP_FIN_WAIT_1 ||
                 ts->sock.tcp.state == TCP_FIN_WAIT_2) {