Multiple seperate streams to one port?

DEar all
Thanks for your help yesterday. I've given up trying to encode data and then tx it over TCP - instead I'm just going to use RTP and encode to a file at the server.
The next question I have is this:
The server will receive many connections from many clients. When a client
a) Can I use one (the same) port on the server for all clients to transmit their RTP to? If so how do I distinguish between the streams on the server? Or must I have separate ports for each incoming stream? If so, how do I find free ports for JMF to use?
b) How can I identify a particular stream as being from a particular PC (as many maybe behind the same nat). Ideally I'd like to send an identification number first.
c) How do I detect the end of the stream on the server? Or must the client tell the server via some other means?
Thanks
Gareth
Edited by: 831660 on 28-Jan-2011 02:53

a) Can I use one (the same) port on the server for all clients to transmit their RTP to? If so how do I distinguish between the streams on the server? Or must I have separate ports for each incoming stream? If so, how do I find free ports for JMF to use?You're supposed to use separate ports for each incoming stream. You should handle this situation using a normal "listen & fork" server routine.
If you're unfamiliar with the concept, you have a server that listens for incoming requests on a well-known port, and then serves the request on "any available port". Essentially it listens for a request, and then forks off a thread to handle the connection for the client on another port. That way, the well-known port isn't ever "in use"...
You'll just need to write a basic handshake protocol that your server and client can use. The server listens for requests on some defined port. When it receives a request from a client, it'll pick an unused port, transmit that port back to the client, and then start listening for an RTP connection on the port it told the client.
b) How can I identify a particular stream as being from a particular PC (as many maybe behind the same nat). Ideally I'd like to send an identification number first.A solves this issue.
c) How do I detect the end of the stream on the server? Or must the client tell the server via some other means?You're able to listen for the following events on an RTP session by registering a "ReceiveStreamListener" on your RTP session:
-- NewReceiveStreamEvent, when a new stream arrives
-- InactiveReceiveStreamEvent, when the stream becomes inactive
-- ActiveReceiveStreamEvent, when the stream becomes active again after a previous inactive event was generated
-- TimeoutEvent, when the stream times out.
-- ByeEvent, when the stream is done.
So, the end of a stream occurs when you receive a TimeoutEvent or a ByeEvent (which is a subclass of TimeoutEvent so you really only have to handle TimeoutEvents), and you may also possibly want to consider a InactiveReceiveStreamevent to be the end of a stream.

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          "Jason Rosenberg" <[email protected]> wrote:
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