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FreeRTOS+TCP V2 is now included in the main FreeRTOS kernel download under the MIT license.

Create, Configure and Bind a UDP Socket
Part of the FreeRTOS+TCP Networking Tutorial

UDP Sockets are created using the FreeRTOS_socket() API function with the xType (second) parameter set to FREERTOS_SOCK_DGRAM, configured using the FreeRTOS_setsockopt() function, and bound to a port (if necessary) using the FreeRTOS_bind() function.


static void prvSimpleUDPServerTask( void *pvParameters )
{
long lBytes;
struct freertos_sockaddr xBindAddress;
Socket_t xListeningSocket;
const TickType_t xSendTimeOut = 200 / portTICK_PERIOD_MS;

   /* Attempt to open the UDP socket. */
   xListeningSocket = FreeRTOS_socket( FREERTOS_AF_INET,
                                       FREERTOS_SOCK_DGRAM,/*FREERTOS_SOCK_DGRAM for UDP.*/
                                       FREERTOS_IPPROTO_UDP );

   /* Check for errors. */
   configASSERT( xListeningSocket != FREERTOS_INVALID_SOCKET );

   /* Ensure calls to FreeRTOS_sendto() timeout if a network buffer cannot be
   obtained within 200ms. */
   FreeRTOS_setsockopt( xListeningSocket,
                        0,
                        FREERTOS_SO_SNDTIMEO,
                        &xSendTimeOut,
                        sizeof( xSendTimeOut ) );

   /* Bind the socket to port 0x1234. */
   xBindAddress.sin_port = FreeRTOS_htons( 0x1234 );
   FreeRTOS_bind( xListeningSocket, &xBindAddress, sizeof( xBindAddress ) );

   for( ;; )
   {
       /*
        * The socket can now send and receive data here.
        */
   }
}
						
Creating, configuring and binding a UDP socket



<< Back to the RTOS TCP networking tutorial index


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