FreeRTOS+UDP was removed from the FreeRTOS kernel download from
FreeRTOS V10.1.0. See the FreeRTOS+TCP stack, which can be
configured for UDP only use, as an alternative.
uint32_t FreeRTOS_inet_addr_quick( uint8_t ucOctet1, uint8_t ucOctet2,
uint8_t ucOctet3, uint8_t ucOctet4 );
FreeRTOS_inet_addr_quick() is a macro that converts an IP address expressed
as four separate numeric octets (for example 192, 168, 0, 100) into a
an IP address expressed as a 32-bit number in network byte order
is a function that converts an IP address expressed
in decimal dot notation (for example “192.168.0.100”) into a 32-bit IP
address in network byte order.
FreeRTOS_inet_addr_quick() is the preferred method because of its smaller
size and faster execution. FreeRTOS_inet_addr() is provided because it
conforms to the expected Berkeley sockets function prototype.
The first octet of the four octet IP address.
The second octet of the four octet IP address.
The third octet of the four octet IP address.
The forth octet of the four octet IP address.
The IP address represented by the four parameters expressed as a single
32-bit number in network byte order.
This example sends a string to port 5000 of IP address 192.168.0.100, using
FreeRTOS_inet_addr_quick() to convert the IP address from individual octets to a string in the necessary
The socket is passed in as the function parameter, and is assumed to have already
been created using a call to FreeRTOS_socket().
If ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND is not set to 1 in
FreeRTOSIPConfig.h, then the socket is also assumed to have been bound to
a port number using FreeRTOS_bind().
void aFunction( xSocket_t xSocket )
struct freertos_sockaddr xDestinationAddress;
const int8_t *pcMessageToSend = “String being sent”;
xDestinationAddress.sin_addr = FreeRTOS_inet_addr_quick( 192, 168, 0, 100 );
xDestinationAddress.sin_port = FreeRTOS_htons( 5000 );
iReturned = FreeRTOS_sendto(
strlen( pcMessageToSend ),
sizeof( xDestinationAddress )
Example use of the FreeRTOS_inet_addr_quick() API function
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