fix: abort client close to avoid time-wait reconnect block

App/tcp_client.c

@@ -5,6 +5,8 @@
 #include "queue.h"
 #include "lwip/api.h"
 #include "lwip/ip_addr.h"
+#include "lwip/tcp.h"
+#include "lwip/tcpip.h"
 
 #include "app_runtime.h"
 #include "config.h"
@@ -14,6 +16,30 @@
 
 #define TCP_CLIENT_CONNECT_TIMEOUT_MS 5000
 
+static void tcp_client_abort_and_delete(struct netconn *conn, uint8_t link_index)
+{
+    struct tcp_pcb *pcb;
+
+    if (conn == NULL) {
+        return;
+    }
+
+    pcb = conn->pcb.tcp;
+    if (pcb != NULL) {
+        LOCK_TCPIP_CORE();
+        pcb = conn->pcb.tcp;
+        if (pcb != NULL) {
+            tcp_abort(pcb);
+            conn->pcb.tcp = NULL;
+            conn->state = NETCONN_NONE;
+            debug_log_printf("[CLI] idx=%u abort-close\r\n", (unsigned int)link_index);
+        }
+        UNLOCK_TCPIP_CORE();
+    }
+
+    netconn_delete(conn);
+}
+
 static err_t tcp_client_worker(struct netconn *conn, uint8_t link_index)
 {
     struct netbuf *buf;
@@ -140,8 +166,7 @@ static void tcp_client_task(uint8_t link_index)
             }
         }
 
-        netconn_close(conn);
-        netconn_delete(conn);
+        tcp_client_abort_and_delete(conn, link_index);
         vTaskDelay(pdMS_TO_TICKS(delay_ms));
     }
 }