Difficulty in communicating through TCP BIS-B socket

I have tries to establish a TCP via BIS - B connection and run into some problems. Before describing the situation, I just want to clarify:

-We are members of the BlackBerry Alliance program;
-We have received permission to use BIS-B;
-L'application now works under direct TCP. and
-L' sample application supplied with the BIS-B information kit works well on the device.

So, it seems that the camera has access BIS-B and that our application should be able to connect through BIS-B without difficulty. Previously, I have forwarded this issue to the Alliance but has been achieved here for support, so I will briefly the question not to mention that all aspects of BIS - B covered under the NDA.

Here's the situation:

The connection string that I use to create a TCP socket in our program the device server is:
Socket://IP_ADDRESS:TCP_SERVER_PORT; BIS_B_CONNECTION_STRING

Where:
Ip_address is the IP address of the server, the connection program is made for;
TCP_SERVER_PORT is the TCP port; and
BIS_B_CONNECTION_STRING is provided to access BIS-B connection string.

As with direct TCP, the SocketConnection object is created:
(SocketConnection) Connector.Open (connString, Connector.READ_WRITE);

Where connString is the above connection string. Once the connector is created, threads separate send and receive support are started.

To connect to the server, a packet of 76 bytes of data is written to the socket with OutputStream.write (byte [] b, int off, int len) and rinse with OutputStream.flush (). Data are received on the server without problem and a 32-byte ACK packet is sent to the server to the device subsequently.

Here is where the problem appears: the client application on the device never receives the data sent from the server. Even if the socket has been established and data can be sent on this socket of the device to the server, not a single byte sent from the server to the device is received by the device. However, when you use TCP direct to establish awareness, data are transmitted between the server and the device without problem.

This leads me to conclude that one or both of the following ways are produced:

(1) I'm not creates the socket correctly for a BIS - B connection.

The examples in the documentation for BIS - B are all for HTTP connections and no demo code is provided to show how a TCP socket should be created. It is quite possible, there is a minor adjustment for the BIS-B connection string which I am unaware or I create the socket incorrectly.

(2) my BlackBerry service provider incorrectly configured their BIS-B network connections.

My device is connected to TELUS and the situation I am facing to sounds a bit like the one described by this man in 2008:

http://supportforums.BlackBerry.com/T5/General-BlackBerry-smartphone/TELUS-confirmed-BlackBerry-bis-...

Given that the problem occurs when the data is passed from the server to the device, it seems possible that the IP addresses of device are not properly being NATted on the public address that the server transmits data. I called people of the TELUS DNA to confirm the BIS-B service is available, but (as the related post described), which does not necessarily eliminate the possibility of a misconfigured NAT.

So my questions to you people are:

-If a TCP server program receives data from a device via BIS - B, does indicate that the BIS - B has been correctly established (and so the problem of receiving data server-device is specific to the device or carrier)?

-J' I am doing something obviously wrong when establishing a TCP via BIS - B socket?

-Are there a required additional parameter in the connection string (beyond those provided by the HTTP BIS-B connection example) which creates a TCP via BIS - B socket?

Cause of the problem proved to be the use of InputStream.available () to check the amount of bytes available to entrants on the socket.

Although InputStream.available () worked well for direct TCP (at least for CDMA Networks), the method returns always 0 when it receives on BIS - B bytes. As a result, it appeared that the side Server-device of the TCP socket was not receiving data when in fact, the data were available for playback. With the help of InputStream.read () instead, block and read each byte it received on the socket has resolved the problem. Given that the incompatible features, I would recommend avoiding the use of InputStream.available ().

For all those looking at the creation of BIS-B TCP taken in the future, here an answer to my original question:

The connection string to use to create a TCP socket BIS - B is the same as that shown in the code examples in the RIM for an HTTP connection (examples of code and your BIS - B connection string are received once approval has been given to use BIS-B under the program of the Alliance).

For example, if your connection string to create a direct TCP socket would be:

Socket://IP_ADDRESS:TCP_PORT; deviceside = true

where ip_address is the IP address of your server TCP program and port_tcp is the network port on which traffic is received by the server, you need to replace only the "; deviceside = true' part of your connection string with the string supplied by RIM for your BIS - B connection. The resulting string would then serve to create a standard TCP socket, such as the following:

(SocketConnection) Connector.Open (connString, Connector.READ_WRITE);

where connString is your ' socket: / /... ". ' connection string.

Tags: BlackBerry Developers

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Guys pls help me because I am facing a problem when communicating via the TCP/IP protocol.

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