Re: [sr-dev] about contact params

2010/11/26 Juha Heinanen jh@tutpro.com:

i noticed that if i add ;alias param to contact header that does not surround its contact uri in <>s like this:

Contact: sip:foo@bar;alias=value

In this header, "alias" is a header parameter. 100% sure.

then some sip entities interpret ;alias as header param rather than uri param.

so i went and added <>s if they are not present resulting to this:

Contact: sip:foo@bar;alias=value

In this case "alias" is a SIP URI parameter.

i have tried to figure out from rfc3261 what kind of param ;alias is in the first example, but have not found the answer.  looks like it is unspecified in rfc3261.

It's specified in the BNF grammar and AFAIR somewhere else. But I can sure that what I say above is correct.