File content as of revision 22:c4360e61486a:

/* Copyright (C) 2012 mbed.org, MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
 * and associated documentation files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge, publish, distribute,
 * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or
 * substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "UDPSocket.h"

#include <string>
#include <algorithm>

extern Serial pc;

UDPSocket::UDPSocket()
{
    endpoint_configured = false;
    endpoint_read = false;
    Endpoint currentEndpoint;
}

int UDPSocket::init(void)
{
    return 0;
}

// Server initialization
int UDPSocket::bind(int port)
{
    return 0;
}

// -1 if unsuccessful, else number of bytes written
int UDPSocket::sendTo(Endpoint &remote, char *packet, int length)
{
    Timer tmr;
    int idx = 0;

    confEndpoint(remote);

    tmr.start();

    while ((tmr.read_ms() < _timeout) || _blocking) {

        idx += wifi->send(packet, length);

        if (idx == length)
            return idx;
    }
    return (idx == 0) ? -1 : idx;
}

// -1 if unsuccessful, else number of bytes received
int UDPSocket::receiveFrom(Endpoint &remote, char *buffer, int length)
{
    Timer tmr;
    int idx = 0;
    int nb_available = 0;
    int time = -1;
    tmr.start();
    
    if (_blocking) {
        while (1) {
            nb_available = wifi->readable();
            if (nb_available != 0) {
                break;
            }
        }
    }
    else {
        tmr.reset();
        
        while (time < _timeout){
            nb_available = wifi->readable();
            if (nb_available < 0) return nb_available;
            if (nb_available > 0) break ;
            time = tmr.read_ms();
        }
        
        if (nb_available == 0) return nb_available;  
    } 
    
    tmr.reset();
    while (time < _timeout) {

        nb_available = wifi->readable();
        for (int i = 0; i < min(nb_available, length); i++) {
            buffer[idx] = wifi->getc();
            idx++;
        }

        if (idx == length) {
            break;
        }
        
        time = tmr.read_ms();
    }
    readEndpoint(remote);
    return (idx == 0) ? -1 : idx;
}

bool UDPSocket::confEndpoint(Endpoint & ep)
{
    currentEndpoint = ep;
    return true;
}

bool UDPSocket::readEndpoint(Endpoint & ep)
{
    ep = currentEndpoint;
    return true;
}