refactor(vd960DBN): replace compile-time NET_SSC/NET_JSON/NET_IOT macros with runtime g_sub_code_enable.iot_enable

- Remove NET_SSC_ENABLE, NET_JSON_ENABLE, NET_IOT_ENABLE from net_config.h
- Socket config always allocates max: 1 UDP + 2 TCP + 1 TCP_LISTEN
- All #if guards in net_srv.c/h and peripheral_main.c replaced with
  runtime g_sub_code_enable.iot_enable checks
- iot_enable=0 -> SSC mode (UDP + TCP client + JSON server)
- iot_enable=1 -> IoT MQTT mode (MQTT client via iot_mqtt_srv)

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/net_srv.c

@@ -18,9 +18,7 @@
 #include "cmcng.h"
 #include "simple_json.h"
 #include "tcp_json_srv.h"
-#if NET_IOT_ENABLE
 #include "iot_mqtt_srv.h"
-#endif
 
 
 uint32_t slen;
@@ -58,8 +56,6 @@ uint16_t srcport = 6000;
 //UINT16 aport=1000;											                   /* CH579?????????? */
 uint32_t g_wdg_counter = 0;
 
-#if NET_SSC_ENABLE
-
 uint8_t SocketId_TCP;
 uint8_t SocketId_UDP ;
 uint8_t socket[WCHNET_MAX_SOCKET_NUM];                           //Save the currently connected socket
@@ -86,8 +82,6 @@ void clear_mqtt_buf(void)
     memset(mqttBuf, 0, MAX_MQTTBUF_LEN);
 }
 
-#endif /* NET_SSC_ENABLE */
-
 /*********************************************************************
  * @fn      mStopIfError
  *
@@ -103,8 +97,6 @@ void mStopIfError(u8 iError)
     printf("Error: 0x%02X\r\n", (u16)iError);
 }
 
-#if NET_SSC_ENABLE
-
 void mqtt_connect(void)
 {
     int len = 0;
@@ -470,8 +462,6 @@ void WCHNET_DataManage(uint8_t id)
         
 }
 
-#endif /* NET_SSC_ENABLE */
-
 
 
 
@@ -487,15 +477,21 @@ void WCHNET_DataManage(uint8_t id)
  */
 void WCHNET_HandleSockInt(uint8_t socketid, uint8_t intstat)
 {
-#if NET_SSC_ENABLE
-    uint8_t i;
+uint8_t i;
     
-    // Route JSON protocol socket events (both TCP + TCP_LISTEN internal)
+    // Route JSON protocol socket events -- always active regardless of mode
     if (socketid == g_json_socket_listen || socketid == (g_json_socket_listen + 1)) {
         tcp_json_handle_sock_int(socketid, intstat);
         return;
     }
     
+    // IoT MQTT mode -- route to MQTT handler
+    if (g_sub_code_enable.iot_enable) {
+        iot_mqtt_handle_sock_int(socketid, intstat);
+        return;
+    }
+    
+    // === SSC mode below ===
     g_net_state.intstat = intstat;
     
     if (intstat & SINT_STAT_RECV)                              //receive data
@@ -513,48 +509,24 @@ void WCHNET_HandleSockInt(uint8_t socketid, uint8_t intstat)
             PRINT("TCP Connect Success\r\n");
             PRINT("socket id: %d\r\n", socketid);
         }
-        
-        // if(g_sub_code_enable.iot_enable){
-        //     mqtt_connect();
-        // }
     }
     if (intstat & SINT_STAT_DISCONNECT)                         //disconnect
     {        
         {
             PRINT("TCP Disconnect\r\n");
         }
-//        WCHNET_SocketClose(socketid, 0);
         g_net_state.flag = 1;
     }
     if (intstat & SINT_STAT_TIM_OUT)                             //timeout disconnect
     {
-//        for (i = 0; i < WCHNET_MAX_SOCKET_NUM; i++) {            //delete disconnected socket id
-//            if (socket[i] == socketid) {
-//                socket[i] = 0xff;
-//                break;
-//            }
-//        }
-//        if(g_flag_debug)
         {
             PRINT("TCP Timeout\r\n");
         }
-//        WCHNET_SocketClose(socketid, 0);
         g_net_state.flag = 1;
-        // WCHNET_CreateTcpSocket();
     }
-#else  /* !NET_SSC_ENABLE */
-#if NET_IOT_ENABLE
-    /* IoT MQTT mode — route MQTT socket, JSON server not active */
-    iot_mqtt_handle_sock_int(socketid, intstat);
-#else
-    tcp_json_handle_sock_int(socketid, intstat);
-#endif
-#endif
 }
 
 
-#if NET_SSC_ENABLE
-
 void dbn_net_ssc_srv(void)
 {
     uint8_t _flag_timestamp = 0;
@@ -615,8 +587,6 @@ void poll_mqtt(void)
     }
 }
 
-#endif /* NET_SSC_ENABLE */
-
 
 /*******************************************************************************
 * Function Name  : GetMacAddr
@@ -672,8 +642,6 @@ int get_ipstr_to_array(char *src, uint8_t *dst) {
 }
 
 
-#if NET_SSC_ENABLE
-
 void unpack_ssc_count_off(uint8_t socket,uint8_t count_mode, uint8_t *ip, uint16_t port, uint8_t *buf, uint32_t len)
 {
     uint16_t i,j;
@@ -1047,8 +1015,6 @@ void manage_mqtt_recv_message(char * msg, int length)
     }
 }
 
-#endif /* NET_SSC_ENABLE */
-
 
 
 
@@ -1118,9 +1084,7 @@ void net_srv_init(void)
                 WCHNET_ConfigKeepLive(&cfg);
             }
             #endif
-#if NET_SSC_ENABLE
             memset(socket, 0xff, WCHNET_MAX_SOCKET_NUM);
-#endif
             
         }
         
@@ -1128,17 +1092,15 @@ void net_srv_init(void)
     
     if(g_net_state.flag == 1)
     {
-#if NET_SSC_ENABLE
-        WCHNET_CreateUdpSocket();
-#endif
-#if NET_IOT_ENABLE
-        iot_mqtt_init();            // Init IoT MQTT client (connect to broker)
-#else
-        tcp_json_srv_init();        // Start JSON protocol TCP listener on port 5960
-#endif
-#if !NET_SSC_ENABLE
-        g_net_state.flag = 2;       // Skip SSC init, advance state directly
-#endif
+        if (g_sub_code_enable.iot_enable) {
+            /* IoT MQTT mode -- init MQTT client, skip UDP */
+            iot_mqtt_init();            // Init IoT MQTT client (connect to broker)
+            g_net_state.flag = 2;       // Skip SSC init, advance state directly
+        } else {
+            /* SSC mode -- create UDP socket + JSON server */
+            WCHNET_CreateUdpSocket();
+            tcp_json_srv_init();        // Start JSON protocol TCP listener on port 5960
+        }
     }