<HTML dir=ltr><HEAD><TITLE>Re: [asterisk-dev] Custom SIP headers and reinvites</TITLE>
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<FONT face=Tahoma size=2><B>From:</B> asterisk-dev-bounces@lists.digium.com on behalf of Kevin P. Fleming<BR><B>Sent:</B> Tue 4/17/2007 10:14 PM<BR><B>To:</B> Asterisk Developers Mailing List<BR><B>Subject:</B> Re: [asterisk-dev] Custom SIP headers and reinvites<BR></FONT><BR></DIV></DIV>
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<P><FONT size=2>Watkins, Bradley wrote:<BR><BR>>> I guess what I'm looking for is some guidance on what the correct<BR>>> behavior is here. Obviously, these headers should be available one way<BR>>> or the other. The question is whether the reinvite should have the<BR>>> custom headers or whether they need to have some more persistant storage<BR>>> at the receiving end. I'm inclined to say the latter, as it's possible<BR>>> that you could have this same issue with other B2BUA's in a similar<BR>>> scenario.<BR><BR>> I would agree in principle that this is the receiving end's<BR>> responsibility to handle. The first issue will be clearly defining which<BR>> headers should be preserved throughout the life of the dialog even when<BR>> subsequent INVITEs have been received. This could be just 'all headers<BR>> that begin with X-' or it could be more complex than that, but the more<BR>> complex it is the less likely it will get treated as a 'bug fix' or a<BR>> simple enhancement :-)<BR></FONT></P>
<P><FONT size=2>For certain, anything that would go into an already-released version should be as simple as possible. Personally I think that having all X-headers preserved would be a good balance, and it would definitely solve my problem since that's exactly what I need. :)</FONT></P>
<P><FONT size=2>Perhaps Olle can chime in, but I couldn't really find any RFC-level guidance for SIP in my cursory glance at some relevant ones.</FONT></P>
<P><FONT size=2>- Brad</P></FONT></DIV><br/>The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.</BODY></HTML>