Hello, im trying to use TCP hole punching to establish a p2p connection to transfer audio files without a server, and I feel like I’m close, but no cigar… both the clients are connecting to my server and receiving each others public ip/port and local port. Server code from here:
Next, I am attempting to have both connect using the each others IPs and ports but this is causing the connection to fail. To test this im trying to send a string and see if I can receive it. I know the addresses I get from the server are correct.
Am I misimplementing this algorithm? I’m having a hard time with this. I’ve noticed that in the client code of the linked server i posted (here) they bind to the local port of the opposite client, if it I attempt to BindPort(…) after creating a socket I get a result of -1 due to an invalid handle.
Bit lost, could anyone kindly point me in the right direction?
Client A
m_poConnectSocket->bindToPort(strTokens[4].getIntValue()); // local port
if (m_poConnectSocket->connect(m_StrYourIp, m_StrYourPort.getIntValue()))
{
bSuccessDirect = true;
for (int i = 0; i < 5; i++)
{
String strSize = "test";
int iBytesWritten = m_poConnectSocket->write(strSize.getCharPointer(), strSize.getNumBytesAsUTF8());
String bytes(iBytesWritten);
DBG(bytes);
Sleep(3000);
}
}
else
{
DBG("Failed to connect");
}Client B
StreamingSocket* poListener = new StreamingSocket;
poListener->connect(strYourIp, strYourPort.getIntValue());
if (poListener != nullptr)
{
printf("\nConnected!");
printf("Bound port %d\n", poListener->getBoundPort());
int iDataRead = 0;
while (true)
{
if (poListener != nullptr &&
poListener->isConnected())
{
iDataRead = poListener->read(poBuffer, MAX_BUFFER_SIZE - 1, false);
if (iDataRead > 0)
{
bool test = false;
printf("data received: %d\n", iDataRead);
}
}
else
{
bool bProblem = true;
}
}
String strRead1(CharPointer_UTF8(poBuffer), iDataRead);
printf(strRead1.getCharPointer());
bool test = false;
}