Bluetooth Programming...

[drgoldie]

This is for the C/C++ developers out here...

i need to connect a PocketPC to a PC via Bluetooth. Looking at various samples from the Windows Platform SDK and the Windows Mobile SDKs, i came up with the following server (PC) and client (PDA) codes:

Server Code (WinXP):
WSAData wsaData;
SOCKADDR_BTH sa;
int namelen;
SOCKET sock;
SOCKADDR_BTH sockaddr;
int size = sizeof(sockaddr);

if (WSAStartup(MAKEWORD(2, 2), &wsaData) == SOCKET_ERROR)
return false;

BluetoothHost_Socket = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);

if (BluetoothHost_Socket == INVALID_SOCKET)
return false;

memset (&sa, 0, sizeof(sa));
sa.addressFamily = AF_BTH;
sa.port = 0;

if (bind(BluetoothHost_Socket, (SOCKADDR *) &sa, sizeof(sa)))
{
closesocket(BluetoothHost_Socket);
return false;

namelen = sizeof(sa);
if (getsockname(BluetoothHost_Socket, (SOCKADDR *)&sa, &namelen))
{
closesocket (BluetoothHost_Socket);
return false;
}

BluetoothHost_ClientListCount = 0;

if (listen(BluetoothHost_Socket, 5))
return false;

sock = accept(BluetoothHost_Socket, (SOCKADDR *) &sockaddr, &size);
}



Client Code (WinCE):

WSAQUERYSET querySet;
HANDLE hLookup;
char buffer[1000];
DWORD bufferlength;
WSAQUERYSET *results;
SOCKADDR_BTH *btaddr;


if (WSAStartup(MAKEWORD(2, 2), &wsaData) == SOCKET_ERROR)
return false;

memset(&querySet, 0, sizeof(querySet));
querySet.dwSize = sizeof(querySet);
querySet.dwNameSpace = NS_BTH;

BluetoothQuery_DeviceCount = 0;

if (WSALookupServiceBegin(&querySet, LUP_CONTAINERS, &hLookup) == SOCKET_ERROR)
return false;

while (BluetoothQuery_DeviceCount < BLUETOOTHQUERY_MAXDEVICES && !BluetoothQuery_Cancel)
{
bufferlength = sizeof(buffer);
memset(buffer, 0, sizeof(buffer));
results = (WSAQUERYSET *) &buffer;

if (WSALookupServiceNext(hLookup, LUP_RETURN_NAME|LUP_RETURN_ADDR, &bufferlength, results) == SOCKET_ERROR)
{
int result = WSAGetLastError();
break;
}

btaddr = (SOCKADDR_BTH*)results->lpcsaBuffer->RemoteAddr.lpSockaddr;
BluetoothQuery_DeviceAddrList[BluetoothQuery_Devic eCount]=btaddr->btAddr;

if (results->lpszServiceInstanceName != NULL)
wcscpy((TCHAR *)BluetoothQuery_DeviceNameList[BluetoothQuery_Dev iceCount],results->lpszServiceInstanceName);
else
wcscpy((TCHAR *)BluetoothQuery_DeviceNameList[BluetoothQuery_Dev iceCount],L"<unnamed>");

BluetoothQuery_DeviceCount++;
}

WSALookupServiceEnd(hLookup);

BluetoothClient_Socket = socket (AF_BT, SOCK_STREAM, BTHPROTO_RFCOMM);

if (BluetoothClient_Socket == INVALID_SOCKET)
return false;

SOCKADDR_BTH sa;
memset (&sa, 0, sizeof(sa));
sa.addressFamily = AF_BT;
sa.btAddr = *btaddr;

for (i = 0; i < 30; i++)
{
sa.port = i; //channel & 0xff;
if (connect(BluetoothClient_Socket, (SOCKADDR *) &sa, sizeof(sa)) == 0)
break;
}

if (i >= 30)
{
closesocket(BluetoothClient_Socket);
return false;
}


All calls seems to work out. Sockets are created, all return values look ok. Yet, the client does not connect to the server, so the server never goes beyong that accept() call.

Any comments would be greatly appreciated!

thanks,
Daniel