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Re: checking SDP errors in SessionDescription

From: ᛏᚮᛘᛘᚤ <tommyw@google.com>
Date: Wed, 1 Aug 2012 13:33:17 +0200
Message-ID: <CALLKCfPCS+5C9WcqOOW+NZnNuz_=2+qQW8U8ZneL+umFthOgzg@mail.gmail.com>
To: Li Li <Li.NJ.Li@huawei.com>
Cc: "public-webrtc@w3.org" <public-webrtc@w3.org>
An api to verify the SDP in a SessionDescription would very likely use the
same SDP verifier as used in PC.setRemoteDescription() and therefore
redundant. You gain nothing by verifying the SDP twice.

Also the SDP can't be fully verified with anything else than the relevant
PeerConnection since it is state dependent.

Or maybe I am missing your point? Could you please give an use case?

/Tommy

On Tue, Jul 31, 2012 at 6:06 PM, Li Li <Li.NJ.Li@huawei.com> wrote:

>  I think the idea is to give the applications the ability to not use an
> invalid SDP with a PeerConnection.****
>
> ** **
>
> Thanks.****
>
> Li****
>
> ** **
>
> *From:* Tommy Widenflycht (ᛏᚮᛘᛘᚤ) [mailto:tommyw@google.com]
> *Sent:* Tuesday, July 31, 2012 11:21 AM
> *To:* Li Li
> *Cc:* public-webrtc@w3.org
> *Subject:* Re: checking SDP errors in SessionDescription****
>
> ** **
>
> But what would you use a SessionDescription object for if you don't have
> an PeerConnection?****
>
> ** **
>
> /Tommy****
>
> On Tue, Jul 31, 2012 at 5:04 PM, Li Li <Li.NJ.Li@huawei.com> wrote:****
>
> When constructing a SessionDescription from a SDP string received from a
> peer, the SDP string may contain syntactic errors (according to RFC4566) as
> it may have been manipulated by the remote application. ****
>
>  ****
>
> I think the browser should catch these errors during the construction of
> SessionDescription object, through  error callback or exception. By
> detecting an invalid SDP early, the application can be more robust and
> efficient.****
>
>  ****
>
> The current API can catch these errors in setRemoteDescrition() through
> its error callback. However, this requires a PeerConnection object. ****
>
>  ****
>
> Thanks.****
>
> Li****
>
>  ****
>
>  ****
>
>
>
> ****
>
> ** **
>
> --
> Tommy Widenflycht, Senior Software Engineer
> Google Sweden AB, Kungsbron 2, SE-11122 Stockholm, Sweden
> Org. nr. 556656-6880
> And yes, I have to include the above in every outgoing email according to
> EU law.****
>



-- 
Tommy Widenflycht, Senior Software Engineer
Google Sweden AB, Kungsbron 2, SE-11122 Stockholm, Sweden
Org. nr. 556656-6880
And yes, I have to include the above in every outgoing email according to
EU law.
Received on Wednesday, 1 August 2012 11:33:48 GMT

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