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Got it. Thank you Ross,
Massimo
________________________________
From: live-devel <[email protected]> on behalf of Ross
Finlayson <[email protected]>
Sent: Thursday, December 10, 2020 1:31 PM
To: LIVE555 Streaming Media - development & use <[email protected]>
Subject: Re: [Live-devel] Timeout on reception of RTSP commands
> On Dec 10, 2020, at 10:01 PM, Massimo Perrone via live-devel
> <[email protected]> wrote:
>
> I'm having troubles with a buggy RTSP server which (for reasons that I cannot
> control) does not respond to the RTSP OPTION command while leaving the
> connection opened.
> In such a case, the livemedia RTSPClient hangs up until the server responds
> or close the connection.
The RTSP client isn’t really ‘hanging’ here, because I/O in LIVE555-based
applications is asynchronous (i.e., non-blocking). What it is doing, however,
is just sitting in the event loop, waiting for an event (in this case, an
incoming response to the earlier RTSP “OPTIONS” request) that never happens.
The client will still handle any other event that occurs instead - for example,
a timeout. (See below.)
> My question is: is there a method, or a strategy to impose a timeout on the
> reception of RTSP command response in the liveMedia RTSPClient class ?
Yes, the way to do this is to set up a ‘handler’ function to be called after a
timeout interval (of your choice). This is done using the
“TaskScheduler::scheduleDelayedTask()” function. (There are several examples
of this in the code; e.g. in “testProgs/testRTSPClient.cpp”)
Your handler function would then call:
yourRTSPClient->changeResponseHandler(cseq, NULL);
to cancel the pending request. “cseq” is the (unsigned) integer value that was
returned by your previous call to “sendOptionsCommand()” - i.e.:
cseq = yourRTSPClient->sendOptionsCommand( … );
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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