fix: tcp_json_handle_sock_int RECV 被 listen socket 分支拦截导致收不到鉴权数据

- RECV 处理移到函数最前面，优先于 listen socket 检查
- listen socket 分支增加 socketid!=g_json_socket_client 保护，
  防止 listen 与 accepted client 为同一 socket ID 时
  RECV 事件被 listen 分支 return 拦截
- WCHNET 某些版本可能将 TCP_LISTEN 和已 accept 的连接
  共用同一 socket ID，此时旧代码在 listen 检查处直接 return
  导致后续 client RECV 处理永远不被执行

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/tcp_json_srv.c

@@ -85,9 +85,6 @@ static uint32_t json_get_msg_id(const char *json) {
     return (uint32_t)strtoul(g_tmp_value, NULL, 10);
 }
 
-static void json_get_cmd(const char *json, char *out, int out_len) {
-    json_get_str_field(json, "\"cmd\"", out, out_len);
-}
 
 static char *json_get_data_str(const char *json) {
     char *data = (char *)malloc(TCP_JSON_MAX_FRAME);
@@ -114,6 +111,10 @@ static void json_get_str_field(const char *json, const char *key, char *out, int
     out[copy_len] = '\0';
 }
 
+static void json_get_cmd(const char *json, char *out, int out_len) {
+    json_get_str_field(json, "\"cmd\"", out, out_len);
+}
+
 static uint32_t json_get_uint_field(const char *json, const char *key) {
     reset_tmp();
     simple_parse_json(json, key, g_tmp_value);
@@ -623,67 +624,26 @@ void tcp_json_srv_init(void) {
 }
 
 void tcp_json_handle_sock_int(uint8_t socketid, uint8_t intstat) {
-    // === Listen socket events ===
-    if (socketid == g_json_socket_listen) {
-        if (intstat & SINT_STAT_CONNECT) {
-            // A client connected — the accepted socket gets its own CONNECT event
-            // We handle the accept in the "newly accepted" path below
-            PRINT("JSON: Listen socket got CONNECT\n");
-        }
-        if (intstat & SINT_STAT_DISCONNECT) {
-            PRINT("JSON: Listen socket disconnect (unexpected)\n");
-        }
-        return;
-    }
-
-    // === Newly accepted client (CONNECT on unknown socket) ===
-    if ((intstat & SINT_STAT_CONNECT) && socketid != g_json_socket_client 
-        && socketid != SocketId_TCP && socketid != SocketId_UDP) {
-        // This is the newly accepted JSON client connection
-        g_json_socket_client = socketid;
-        g_json_auth_state = JSON_STATE_WAIT_AUTH;
-        g_json_pwd_retry = 0;
-        g_json_auth_timer = mstick();
-        g_json_recv_len = 0;
-        memset(g_json_recv_buf, 0, sizeof(g_json_recv_buf));
-        
-        // CRITICAL: Set up receive buffer for the accepted TCP socket
-        // Use a SEPARATE buffer for WCHNET — not g_json_recv_buf
-        // WCHNET_SocketRecv copies FROM this buffer, so it must not overlap
-        WCHNET_ModifyRecvBuf(socketid, (uint32_t)g_json_wchnet_buf, RECE_BUF_LEN);
-        
-        PRINT("JSON: Client accepted on socket %d, recv buf configured\n", socketid);
-        return;
-    }
-
-    // === Client socket events ===
-    if (socketid == g_json_socket_client) {
-        if (intstat & SINT_STAT_RECV) {
-            // Read data from WCHNET's buffer into our frame accumulator
+    // === RECV: Always process for the client socket (handles listen==client overlap) ===
+    if (socketid == g_json_socket_client && (intstat & SINT_STAT_RECV)) {
         uint32_t recv_len = WCHNET_SocketRecvLen(socketid, NULL);
         if (recv_len > 0) {
             uint16_t space = TCP_JSON_RECV_BUF_LEN - g_json_recv_len;
             if (recv_len > space) recv_len = space;
             uint32_t rd_len = recv_len;
-                // Read into a temp buffer first, then append to frame buffer
             uint8_t tmp_buf[RECE_BUF_LEN];
             WCHNET_SocketRecv(socketid, tmp_buf, &rd_len);
             memcpy(g_json_recv_buf + g_json_recv_len, tmp_buf, (uint16_t)rd_len);
             g_json_recv_len += (uint16_t)rd_len;
 
-                // Process complete frames
             char frame[TCP_JSON_MAX_FRAME];
             while (json_extract_frame(g_json_recv_buf, &g_json_recv_len, frame, sizeof(frame))) {
                 PRINT("JSON recv: %s\n", frame);
                 json_process_frame(socketid, frame);
-
-                    // Reset auth timer on activity
                 if (g_json_auth_state == JSON_STATE_WAIT_AUTH) {
                     g_json_auth_timer = mstick();
                 }
             }
-
-                // Buffer overflow protection
             if (g_json_recv_len >= TCP_JSON_MAX_FRAME) {
                 PRINT("JSON: frame overflow, discarding buffer\n");
                 g_json_recv_len = 0;
@@ -692,6 +652,32 @@ void tcp_json_handle_sock_int(uint8_t socketid, uint8_t intstat) {
         }
     }
 
+    // === Listen socket events (log only, no action needed) ===
+    if (socketid == g_json_socket_listen && socketid != g_json_socket_client) {
+        if (intstat & SINT_STAT_CONNECT) {
+            PRINT("JSON: Listen socket got CONNECT\n");
+        }
+        if (intstat & SINT_STAT_DISCONNECT) {
+            PRINT("JSON: Listen socket disconnect (unexpected)\n");
+        }
+    }
+
+    // === Newly accepted client (CONNECT on unknown socket) ===
+    if ((intstat & SINT_STAT_CONNECT) && socketid != g_json_socket_client 
+        && socketid != SocketId_TCP && socketid != SocketId_UDP) {
+        g_json_socket_client = socketid;
+        g_json_auth_state = JSON_STATE_WAIT_AUTH;
+        g_json_pwd_retry = 0;
+        g_json_auth_timer = mstick();
+        g_json_recv_len = 0;
+        memset(g_json_recv_buf, 0, sizeof(g_json_recv_buf));
+        WCHNET_ModifyRecvBuf(socketid, (uint32_t)g_json_wchnet_buf, RECE_BUF_LEN);
+        PRINT("JSON: Client accepted on socket %d, recv buf configured\n", socketid);
+        return;
+    }
+
+    // === Client socket events (non-RECV: CONNECT, DISCONNECT, TIMEOUT) ===
+    if (socketid == g_json_socket_client) {
         if (intstat & SINT_STAT_CONNECT) {
             PRINT("JSON: Client socket connected (id=%d)\n", socketid);
             g_json_auth_state = JSON_STATE_WAIT_AUTH;
@@ -699,7 +685,6 @@ void tcp_json_handle_sock_int(uint8_t socketid, uint8_t intstat) {
             g_json_auth_timer = mstick();
             g_json_recv_len = 0;
         }
-
         if (intstat & SINT_STAT_DISCONNECT) {
             PRINT("JSON: Client disconnected (id=%d)\n", socketid);
             g_json_socket_client = 0xFF;
@@ -707,7 +692,6 @@ void tcp_json_handle_sock_int(uint8_t socketid, uint8_t intstat) {
             g_json_pwd_retry = 0;
             g_json_recv_len = 0;
         }
-
         if (intstat & SINT_STAT_TIM_OUT) {
             PRINT("JSON: Client timeout (id=%d)\n", socketid);
             g_json_socket_client = 0xFF;
@@ -718,16 +702,15 @@ void tcp_json_handle_sock_int(uint8_t socketid, uint8_t intstat) {
         return;
     }
 
-    // === New socket connecting? (WCHNET assigns TCP PCB after listen accept) ===
+    // === Fallback: connect on a socket we haven't tracked yet ===
     if (intstat & SINT_STAT_CONNECT && g_json_socket_client == 0xFF && socketid != g_json_socket_listen) {
-        // This might be the newly accepted JSON client connection
         g_json_socket_client = socketid;
         g_json_auth_state = JSON_STATE_WAIT_AUTH;
         g_json_pwd_retry = 0;
         g_json_auth_timer = mstick();
         g_json_recv_len = 0;
         memset(g_json_recv_buf, 0, sizeof(g_json_recv_buf));
-        PRINT("JSON: Client accepted on socket %d\n", socketid);
+        PRINT("JSON: Client accepted on socket %d (fallback)\n", socketid);
     }
 }