int OsNatSocketBaseImpl::handleTurnDataIndication(char* buffer,
int bufferLength,
UtlString* pRecvFromIp,
int* pRecvFromPort)
{
int rc = 0 ;
TurnMessage msg ;
if (msg.parse(buffer, bufferLength))
{
char* pData ;
uint16_t nData ;
if (msg.getData(pData, nData))
{
assert(pData) ;
assert(nData < bufferLength) ;
if (pData && nData < bufferLength)
{
memcpy(buffer, pData, nData) ;
rc = nData ;
if (pRecvFromIp || pRecvFromPort)
{
char remoteAddr[32] ;
uint16_t remotePort ;
if (msg.getTurnRemoteAddress(remoteAddr, remotePort))
{
if (pRecvFromIp)
*pRecvFromIp = remoteAddr ;
if (pRecvFromPort)
*pRecvFromPort = remotePort ;
}
}
}
}
}
return rc ;
}
bool StunUtils::allocateTurnAddress(OsDatagramSocket* pSocket,
const char* szServerIp,
const int port,
char* szRelayIp,
unsigned short* piRelayPort,
unsigned long* plLifetime)
{
bool bSuccess = false ;
TurnMessage msgSend ;
size_t nLength ;
char cMsgSend[2048] ;
TurnMessage msgReceive ;
char cMsgReceive[2048] ;
msgSend.allocTransactionId() ;
msgSend.setType(MSG_TURN_ALLOCATE_REQUEST) ;
msgSend.setRequestXorOnly() ;
if (msgSend.encode(cMsgSend, sizeof(cMsgSend), nLength))
{
for (int i=0; (i<3) && (bSuccess == false); i++)
{
if (pSocket->write(cMsgSend, (int) nLength, szServerIp, port) > 0)
{
if (pSocket->isReadyToRead(500))
{
int length = pSocket->read(cMsgReceive, sizeof(cMsgReceive)) ;
if ((length > 0) && msgReceive.parse(cMsgReceive, length))
{
if (msgReceive.getType() == MSG_TURN_ALLOCATE_RESPONSE)
{
bSuccess = true ;
// Get optional mapped address
if (szRelayIp && piRelayPort)
{
msgReceive.getMappedAddress(szRelayIp, *piRelayPort) ;
}
if (plLifetime)
{
msgReceive.getLifetime(*plLifetime) ;
}
}
else
{
// Abort on error response
break ;
}
}
}
}
else
{
break ;
}
}
}
else
{
assert(false) ;
}
return bSuccess ;
}