File content as of revision 89:b1d417383c0d:

/* Socket
 * Copyright (c) 2015 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef UDPSOCKET_H
#define UDPSOCKET_H

#include "Socket.h"
#include "NetworkInterface.h"

/** UDP Socket
 */
class UDPSocket : public Socket {
public:
    /** UDPSocket lifetime
     */
    UDPSocket(NetworkInterface *iface);
    virtual ~UDPSocket();
    
    /** Bind a UDP Server Socket to a specific port
     *  @param port     The port to listen for incoming connections on
     *  @return         0 on success, negative on failure.
     */
    int bind(uint16_t port);

    /** Send a packet to a remote endpoint
     *  @param address  The remote SocketAddress
     *  @param data     The packet to be sent
     *  @param size     The length of the packet to be sent
     *  @return         The number of written bytes on success, negative on failure
     */
    int sendto(const SocketAddress &address, const void *data, unsigned size);

    /** Receive a packet from a remote endpoint
     *  @param address  Destination for the remote SocketAddress or null
     *  @param buffer   The buffer for storing the incoming packet data
     *                  If a packet is too long to fit in the supplied buffer,
     *                  excess bytes are discarded
     *  @param size     The length of the buffer
     *  @return         The number of received bytes on success, negative on failure
     */
    int recvfrom(SocketAddress *address, void *buffer, unsigned size);

    /** Register a callback on when send is ready
     *  @param callback Function to call when send will succeed, may be called in
     *                  interrupt context.
     */
    void attach_send(FunctionPointer callback);

    template <typename T, typename M>
    void attach_send(T *tptr, M mptr) {
        attach_send(FunctionPointer(tptr, mptr));
    }

    /** Register a callback on when recv is ready
     *  @param callback Function to call when recv will succeed, may be called in
     *                  interrupt context.
     */
    void attach_recv(FunctionPointer callback);

    template <typename T, typename M>
    void attach_recv(T *tptr, M mptr) {
        attach_recv(FunctionPointer(tptr, mptr));
    }

private:
    FunctionPointer _send_cb;
    FunctionPointer _recv_cb;
};

#endif