[asterisk-dev] [Code Review] Corrected crypto tag in SDP ANSWER for SRTP. (again)

[Matt Jordan]

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/branches/1.8/channels/sip/sdp_crypto.c
<https://reviewboard.asterisk.org/r/2295/#comment14743>

    Since the tag is miniscule (or should be), we could probably make this a char[] of fixed size, similar to everything else in here.
    
    Alternatively, we *could* just make the whole thing string fields.



/branches/1.8/channels/sip/sdp_crypto.c
<https://reviewboard.asterisk.org/r/2295/#comment14744>

    We probably don't need to free p->tag if its already NULL, which you're guaranteed since we create p in this function.



/branches/1.8/channels/sip/sdp_crypto.c
<https://reviewboard.asterisk.org/r/2295/#comment14745>

    I am a little concerned about removing this. Prior to this code change, you were guaranteed that p had the crypto attribute constructed when it came out of this method; now you're guaranteed that it has the pieces and parts to do so.
    
    This may be okay, but we might want to do another look over to verify.


- Matt


On Jan. 28, 2013, 9:48 a.m., David Lee wrote:
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> (Updated Jan. 28, 2013, 9:48 a.m.)
> 
> 
> Review request for Asterisk Developers and Matt Jordan.
> 
> 
> Summary
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> 
> The original fix (r380043) for getting Asterisk to respond with the correct
> tag overlooked some corner cases, and the fact that the same code is in 1.8.
> 
> This patch moves the building of the crypto line out of
> sdp_crypto_process(). Instead, it merely copies the accepted tag. The call to
> sdp_crypto_offer() will build the crypto line in all cases now, using a tag of
> "1" in the case of sending offers.
> 
> 
> This addresses bug ASTERISK-20849.
>     https://issues.asterisk.org/jira/browse/ASTERISK-20849
> 
> 
> Diffs
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>   /branches/1.8/channels/sip/sdp_crypto.c 380244 
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> Diff: https://reviewboard.asterisk.org/r/2295/diff
> 
> 
> Testing
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> 
> Mades some calls using SRTP using a snom 820.
> 
> 
> Thanks,
> 
> David
> 
>

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