sipserver | OfficeSIP Server | Runtime Evironment library
kandi X-RAY | sipserver Summary
kandi X-RAY | sipserver Summary
OfficeSIP is a SIP server for Windows written in C#.
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QUESTION
I am trying to write a SIP client for mobile devices. I use PJSIP for android, and Linphone for iOS. Sometimes the clients respond a 481 for a legitimate CANCEL.
I read RFC 3261 Section 9.1 and tried to see why the client is not matching the dialog. but as far as I see it looks good, the Request URI matches, as does the Call-ID header, the To header including the tag, and the numeric part of the Cseq
...ANSWER
Answered 2019-Jul-25 at 07:16There is one extra requirement to the CANCEL request (RFC3261 chapter 9.1):
A CANCEL constructed by a client MUST have only a single Via header field value matching the top Via value in the request being cancelled. Using the same values for these header fields allows the CANCEL to be matched with the request it cancels
When the UAS receives the CANCEL request it has to find the corresponding INVITE server transaction. RFC3261 chapter 9.2:
The TU determines the transaction to be cancelled by taking the CANCEL request, and then assuming that the request method is anything but CANCEL or ACK and applying the transaction matching procedures of Section 17.2.3. The matching transaction is the one to be cancelled.
One of the matching criteria is the branch parameter in the top Via header of the CANCEL request: it must be identical to the one in the INVITE request that created the server transaction. Since the branch parameters in your INVITE and CANCEL requests differ, the UAS can't find the server transaction and cancel the INVITE.
QUESTION
I am working on audio and video call feature in my application I got success to make call as a audio but I am stuck on video calling. For video calling I am using following code.
...ANSWER
Answered 2017-Jun-10 at 18:50You must build the lib for video support.
To enable video, append this into config_site.h:
#define PJMEDIA_HAS_VIDEO 1
What you are getting is assertion error for checking video support
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