bool Socket::CreateAndConnectUDPSocket(const AdressImplementation& p_connectAdress)
{
// Create Socket
CreateUDPSocket();
// Connect to adress
return ConnectUDPSocket(p_connectAdress);
}
/*
Windows unnamed pipe emulation, used to enable select()
on a Windows machine for the CALLBACK (pipe-based) transport domain.
*/
int create_winpipe_transport(int *pipefds)
{
SOCKET socketpair[2];
struct sockaddr_in socketaddress[2];
struct timeval waittime = {0, 200000};
fd_set readset;
if (InitUPDSocket(&socketpair[0], &socketaddress[0]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
if (InitUPDSocket(&socketpair[1], &socketaddress[1]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
/*
I have two UDP sockets - now lets connect them to each other.
*/
if (ConnectUDPSocket(&socketpair[0], &socketaddress[0], &socketpair[1]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
if(ConnectUDPSocket(&socketpair[1], &socketaddress[1], &socketpair[0]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
/*
The two sockets are connected to each other, now lets test the connection
by sending the own port number.
*/
if(TestUDPSend(&socketpair[0], &socketaddress[0]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
if(TestUDPSend(&socketpair[1], &socketaddress[1]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
/*
Port numbers sent, now lets select() on the socketpair and check that
both messages got through
*/
FD_ZERO(&readset);
FD_SET(socketpair[0], &readset);
FD_SET(socketpair[1], &readset);
/*
For some unknown reason the timeout setting in the select call does not have
the desired effect, and for yet another unknown reason a Sleep(1) solves this
problem.
*/
Sleep(1);
if(select(0, &readset, NULL, NULL, &waittime) != 2 || !FD_ISSET(socketpair[0], &readset) || !FD_ISSET(socketpair[1], &readset))
{
CloseUDPSocketPair(socketpair);
return -1;
}
/*
Check if the packets I receive were really sent by me, and nobody else
tried to sneak.
*/
if(TestUDPReceive(&socketpair[0], &socketpair[1], &socketaddress[1]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
if(TestUDPReceive(&socketpair[1], &socketpair[0], &socketaddress[0]))
{
CloseUDPSocketPair(socketpair);
return -1;
}
/*
All sanity checks passed, I can return a "UDP pipe"
*/
pipefds[0] = (int) socketpair[0];
pipefds[1] = (int) socketpair[1];
return 0;
}