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UDP
[Protocols]

RFC 768 user datagram protocol. More...

Functions
void	NutUdpInput (NETBUF *nb)
	Handle incoming UDP packets.
int	NutUdpOutput (UDPSOCKET *sock, u_long dest, u_short port, NETBUF *nb)
	Send an UDP packet.

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Detailed Description

RFC 768 user datagram protocol.

UDP only provides checksumming of data and multiplexing by port number. Therefore, an application program must deal directly with end-to-end communication problems like retransmission, flow control etc., if required.

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Function Documentation

void NutUdpInput (  NETBUF *    nb )

Handle incoming UDP packets. Note: This routine is called by the IP layer on incoming UDP packets. Applications typically do not call this function. Parameters: nb  Network buffer structure containing the UDP packet.

int NutUdpOutput (  UDPSOCKET *    sock, u_long    daddr, u_short    port, NETBUF *    nb )

Send an UDP packet. Parameters: sock  Socket descriptor. This pointer must have been retrieved by calling NutUdpCreateSocket(). daddr  IP address of the remote host in network byte order. port  Remote port number in host byte order. nb  Network buffer structure containing the datagram. This buffer will be released if the function returns an error. Note: Applications typically do not call this function but use the UDP socket interface. Returns: 0 on success, -1 otherwise.

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