/**
* Receive an UDP packet.
* @param packet The packet that will receive data. The address will be set
* to the source address.
* @return 0 if ok, -1 if error
*/
int UdpSocket::receive(UdpPacket &packet)
{
TRACE_CLASS("UdpSocket", "receive(UdpPacket)");
socklen_t addrSize;
addrSize = sizeof(*packet.getAddress().getAddress());
int ret = recvfrom(listenSocket, packet.getData(), packet.getSize() - packet.getOffset(), 0,
packet.getAddress().getAddress(), &addrSize);
if (ret == SOCKET_ERROR) {
packet.setLength(0);
#ifndef _WIN32
if (errno == EAGAIN)
return 0;
#endif
setInetError("Can't receive UDP packet");
return -1;
}
packet.setLength(ret);
if (ret == (long)packet.getSize()) {
packet.setSize(packet.getSize() << 1);
}
return 0;
}
int UdpSocket::receive(UdpPacket& packet)
{
socklen_t addrSize;
addrSize = sizeof(*packet.getAddress().getAddress());
ssize_t ret = recvfrom(listenSocket,
packet.getData(),
packet.getSize(),
0,
packet.getAddress().getAddress(),
&addrSize);
if (ret == SOCKET_ERROR) {
packet.setSize(0);
if (errno == EAGAIN) {
return 0;
}
setInetError("Can't receive UDP packet");
return -1;
}
packet.setSize(ret);
return 0;
}