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/include/iot_mqtt_srv.h

@@ -5,7 +5,7 @@
  * @version V1.0
  * @date    2026-07-03
  * @brief   IoT MQTT 客户端 — DLD960 IoT 协议 (MQTT + JSON)
- *          当 NET_SSC_ENABLE=0 时启用, 替代 SSC 模式
+ *          当 g_sub_code_enable.iot_enable=1 时启用, 替代 SSC 模式
  *          协议参考: docs/DLD960_IoT_MQTT协议.md
  ******************************************************************************
  */

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/include/net_config.h

@@ -18,39 +18,19 @@ extern "C" {
 #endif
 
 /*********************************************************************
- * Feature toggles (0 = disabled, 1 = enabled)
+ * Feature toggles
  *
- * 模式互斥:
- *   NET_SSC_ENABLE=1 → SSC 模式 (UDP+TCP client) + TCP JSON server
- *   NET_SSC_ENABLE=0 → IoT MQTT 模式 (MQTT client)
- */
-#define NET_SSC_ENABLE                0   /* SSC (UDP + TCP client) protocol support */
-#define NET_JSON_ENABLE               1   /* TCP JSON protocol server (port 5960) */
-#define NET_IOT_ENABLE                (!NET_SSC_ENABLE)  /* IoT MQTT client (auto-derived) */
-
-/*********************************************************************
- * socket configuration, IPRAW + UDP + TCP + TCP_LISTEN = number of sockets
+ * 模式不再通过编译宏选择, 改为运行时 g_sub_code_enable.iot_enable:
+ *   iot_enable=0 → SSC 模式 (UDP+TCP client + TCP JSON server)
+ *   iot_enable=1 → IoT MQTT 模式 (MQTT client)
+ *
+ * Socket 数量按最坏情况 (SSC 模式) 静态分配:
+ *   1 UDP + 2 TCP + 1 TCP_LISTEN = 4
  */
+#define WCHNET_NUM_UDP                1  /* SSC 模式需要 UDP */
+#define WCHNET_NUM_TCP                2  /* JSON(1) + SSC client(1) max */
 #define WCHNET_NUM_IPRAW              0  /* Number of IPRAW connections */
 
-#if NET_SSC_ENABLE
-#define WCHNET_NUM_UDP                1  /* SSC mode: 1 UDP */
-#else
-#define WCHNET_NUM_UDP                0  /* IoT mode: 0 UDP */
-#endif
-
-#if NET_JSON_ENABLE && NET_SSC_ENABLE
-#define WCHNET_NUM_TCP                2  /* SSC+JSON: JSON(1) + SSC client(1) */
-#elif NET_JSON_ENABLE
-#define WCHNET_NUM_TCP                1  /* JSON only: listen+data(1) */
-#elif NET_SSC_ENABLE
-#define WCHNET_NUM_TCP                1  /* SSC only: TCP client(1) */
-#elif NET_IOT_ENABLE
-#define WCHNET_NUM_TCP                1  /* IoT MQTT client(1) */
-#else
-#define WCHNET_NUM_TCP                0
-#endif
-
 #define WCHNET_NUM_TCP_LISTEN         1  /* Number of TCP listening (required internally) */
 
 /* The number of sockets, the maximum is 31  */

vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/include/net_srv.h

@@ -249,10 +249,8 @@ void write_net_config(Local_Net_Cfg *local, NET_CENTER_INFO *center, IOT_NET_INF
 extern uint8_t g_flag_timestamp;
 extern uint8_t RemoteIP[4];
 
-#if NET_SSC_ENABLE
 extern uint8_t SocketId_TCP;
 extern uint8_t SocketId_UDP;
-#endif
 
 
 void manage_udp_message(uint8_t socket, uint8_t *ip, uint16_t port, uint8_t *buf, uint32_t len);
@@ -283,10 +281,8 @@ void GetMacAddr(unsigned char *pMAC);
 void mStopIfError(u8 iError);
 
 void net_srv_init(void);
-#if NET_SSC_ENABLE
 void WCHNET_CreateTcpMqttSocket(void);
 void WCHNET_CreateTcpSocket(void);
-#endif
 void WCHNET_HandleSockInt(uint8_t socketid, uint8_t intstat);
 int get_ipstr_to_array(char *src, uint8_t *dst);
 void WCHNET_HandleGlobalInt(void);