drain ack_q

src/etcp.c

@@ -191,6 +191,7 @@ void etcp_connection_close(struct ETCP_CONN* etcp) {
     drain_and_free_queue(&etcp->input_send_q);
     drain_and_free_queue(&etcp->input_wait_ack);
     drain_and_free_queue(&etcp->recv_q);
+    drain_and_free_queue(&etcp->ack_q);
     
     // Drain and free ack_q (contains ACK_PACKET from ack_pool - special handling)
     if (etcp->ack_q) {
@@ -265,6 +266,7 @@ void etcp_conn_reset(struct ETCP_CONN* etcp) {
     clear_queue(etcp->input_send_q);
     clear_queue(etcp->input_wait_ack);
     clear_queue(etcp->recv_q);
+    clear_queue(etcp->ack_q);
 
     // Reset timers (just clear the pointers - timers will expire naturally)
     etcp->retrans_timer = NULL;