OBEX, send file, windows, any language

I've done this before, but i cannot post the full source code unfortunately. I will post some snippets to help you out. I'm using c++ with the ATL/WTL libraries, so that's where some of the class names come from.

This is what you need to do:

-do device discovery to get the bluetooth address
you will do this through the well documented (on msdn) BluetoothFindFirstRadio, BluetoothFindNextDevice, etc... functions

-next you will use winsock to establish a socket connection to the specified device...here's how to create the socket (roughly)

bool Init()
{
      WORD versionRequested = 0x202;
      WSADATA data;
      if(!WSAStartup(versionRequested,&data))
      {
            s = socket(AF_BTH,SOCK_STREAM,BTHPROTO_RFCOMM);
            if(s == INVALID_SOCKET)
                  return false;

            int protocolInfoSize = sizeof(protocolInfo);

            if(getsockopt(s,SOL_SOCKET, SO_PROTOCOL_INFO,(char*)&protocolInfo,&protocolInfoSize))
                  return false;

            return true;
      }
      else
            return false;
}

-once you have the socket here's how to connect to a device. This was pulled out of a class i wrote. the class members should be self evident.

bool Connect(BluetoothDevice dev)
{
                  SOCKADDR_BTH sab;
                  memset(&sab,0,sizeof(sab));
                  sab.addressFamily = AF_BTH;
                  sab.serviceClassId = OBEXObjectPushServiceClass_UUID;
                  sab.btAddr = dev.Address.ullLong;
                  sab.port = (ULONG)BT_PORT_ANY;

                  sockaddr* pAddr = (sockaddr*)&sab;

                  if(0 == connect(s,pAddr,sizeof(SOCKADDR_BTH)))
                  {
                        CCOMByteArray data;
                        BYTE recvBuff[3];

                        data.Append(OBEX_CONNECT);
                        data.Append(0x00);
                        data.Append(0x07);
                        data.Append(OBEX_VERSION);
                        data.Append(OBEX_CONNECT_FLAGS);
                        data.Append(0x20);
                        data.Append(0x00);


                        if(SOCKET_ERROR == send(s,(char*)data.GetData(),data.GetSize(),0))
                              return false;

                        if(SOCKET_ERROR == recv(s,(char*)recvBuff,3,0))
                              return false;

                        if(recvBuff[0] == OBEX_SUCCESS)
                        {
                              int plength = (0xff * recvBuff[1]) + recvBuff[2];
                              BYTE* buf = new BYTE[plength-3];
                              recv(s,(char*)buf,plength-3,0);
                              NegotiatedPacketSize = (0xff * buf[2]) + buf[3];
                              return true;
                        }
                        else
                              return false;
                  }
else
      return false;
}

here are some defines i used and will be useful:
// OBEX Operation codes
#define OBEX_PUT                        (BYTE)0x02
#define OBEX_PUT_FINAL                  (BYTE)0x82
#define OBEX_GET_FINAL                  (BYTE)0x83
#define OBEX_CONNECT                  (BYTE)0x80
#define OBEX_DISCONNECT                  (BYTE)0x81
#define OBEX_ABORT                        (BYTE)0xFF
 
// OBEX Header codes
#define OBEX_NAME                        (BYTE)0x01
#define OBEX_LENGTH                        (BYTE)0xC3
#define OBEX_DESCRIPTION            (BYTE)0x05
#define OBEX_BODY                        (BYTE)0x48
#define OBEX_END_OF_BODY            (BYTE)0x49
 
// OBEX Response codes
#define OBEX_CONTINUE                  (BYTE)0x90
#define OBEX_SUCCESS                  (BYTE)0xA0

#define OBEX_VERSION                  (BYTE)0x10
#define OBEX_CONNECT_FLAGS            (BYTE)0x00


And finally I will refer you again to the excellent obex client implementation (in C#) at http://www.gatefold.co.uk/obex/
for the logic to do the obex transfer. It will need to be modified if I remember correctly to support sending arbitrary length files...(which is fun :-)

If you get lost, get the obex spec from irda