C++ (Cpp) create_udp_server Examples

Example #1

File: apr_net.c Project: BDA-CODE/monitor-core

apr_socket_t *
create_mcast_server(apr_pool_t *context, int32_t family, char *mcast_ip, apr_port_t port, char *bind_addr, char *interface)
{
  apr_status_t status = APR_SUCCESS;
  /* NOTE: If bind is set to mcast_ip in the configuration file, then we will bind the 
   * the multicast address to the socket as well as the port and prevent any 
   * datagrams that might be delivered to this port from being processed. Otherwise,
   * packets destined to the same port (but a different multicast/unicast channel) will be
   * processed. */
  apr_socket_t *socket = create_udp_server(context, family, port, bind_addr);
  if(!socket)
    {
      return NULL;
    }

  /* TODO: We can probe for a list of interfaces and perform multiple join calls for the same
   * socket to have it listen for multicast traffic on all interfaces (important for
   * multihomed machines). */
  if(interface && !apr_strnatcasecmp(interface, "ALL"))
    {
      /* for(each interface)
       * {
       *   join_mcast(...);
       * }
       */
    }
  else
    {
      status = join_mcast(context,  socket, mcast_ip, port, interface );
    }

  return status == APR_SUCCESS? socket: NULL;
}

Example #2

File: udp_main.c Project: xuhongv/StudyInEsp32

static void udp_conn(void *pvParameters) {

	ESP_LOGI(TAG, "task udp_conn start... \n\r");
	//等待是否已经成功连接到路由器的标志位
	xEventGroupWaitBits(udp_event_group, WIFI_CONNECTED_BIT, false, true,
			portMAX_DELAY);

	ESP_LOGI(TAG,
			"esp32 is ready !!! create udp client or connect servece after 5s... \n\r");
	vTaskDelay(5000 / portTICK_RATE_MS);

//创建客户端并且检查是否创建成功
#if Server_Station_Option
	ESP_LOGI(TAG, "Now Let us create udp server ... \n\r");
	if (create_udp_server() == ESP_FAIL) {
		ESP_LOGI(TAG, " server create socket error , stop !!! \n\r");
		vTaskDelete(NULL);
	} else {
		ESP_LOGI(TAG, "server create socket Succeed  !!! \n\r");
	}
#else
	ESP_LOGI(TAG, "Now Let us create udp client ... \n\r");
	if (create_udp_client() == ESP_FAIL) {
		ESP_LOGI(TAG, "client create socket error , stop !!! \n\r");
		vTaskDelete(NULL);
	} else {
		ESP_LOGI(TAG, "client create socket Succeed  !!! \n\r");
	}
#endif

	//创建一个发送和接收数据的任务
	TaskHandle_t tx_rx_task;
	xTaskCreate(&send_recv_data, "send_recv_data", 4096, NULL, 4, &tx_rx_task);

	//等待 UDP连接成功标志位
	xEventGroupWaitBits(udp_event_group, UDP_CONNCETED_SUCCESS, false, true,
			portMAX_DELAY);

	int bps;
	char sendBuff[1024] = "hello xuhong,I am from Esp32 ...";

	while (1) {

		total_data = 0;

		vTaskDelay(3000 / portTICK_RATE_MS);
		//时隔三秒发送一次数据
      #if !Server_Station_Option
		send_Buff_with_UDP(sendBuff, 1024);
      #endif
		bps = total_data / 3;

		if (total_data <= 0) {
			int err_ret = check_connected_socket();
			if (err_ret == -1) {
				ESP_LOGW(TAG,
						"udp send & recv stop !!! will close socket ... \n\r");
				close_socket();
				break;
			}
		}

		ESP_LOGI(TAG, "udp recv %d byte per sec! total pack: %d \n\r", bps,
				success_pack);

	}

	vTaskDelete(tx_rx_task);
	vTaskDelete(NULL);
}