Re: [Linphone-users] linphone-1.7.1 produces incorrect User-Agent header

[Mark A. Flacy]

On 2007.10.06 19:09, address@hidden wrote:
> The linphone/linphonec application sends out a User-Agent: header that
> does not conform to common internet practices.
>
> Example:
>         CSeq: 1 REGISTER
>         Contact: <sip:address@hidden:5060>
>         Max-Forwards: 70
>         User-Agent: Linphone-1.7.1/eXosip
>
> Problems:
> - the version number should be separated by the program name with a  
> slash ('/')
>
> - the agent and any subproducts which form a significant part of the
>   agent should be listed in order of their significance for
>   identifying the application
>
> - the user-agent string should be user configurable
>
>
> A more correct form of the header could be:
>         User-Agent: Linphone/1.7.1 eXosip/0.1

You should read RFC 3261.  Especially section 25.1.

The EBNF entries for User-Agent are:

server-val       =  product / comment
product          =  token [SLASH product-version]
product-version  =  token
User-Agent  =  "User-Agent" HCOLON server-val *(LWS server-val)

So at best, the correct version would be

User-Agent: Linphone/1.7.1 (eXosip 0.1)



> References:
> - news article format, section 6.16
>   http://www.ietf.org/internet-drafts/draft-ietf-usefor-article-03.txt
> - understanding User-Agent strings   
> http://msdn2.microsoft.com/en-us/library/ms537503.aspx
> - email message headers & descriptions   
> http://stopspam.nettally.com/headers.asp
>
>
> Thanks to all the developers for making such a great free  
> communication tool.
>
>
>
> _______________________________________________
> Linphone-users mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/linphone-users



--
Mark A. Flacy