>>The '*' char shall not be escaped IMO, this is allowed
>>by RFC 2396 in URI syntax. Have you references saying
>>the '*' should be escaped?
Sorry, you are right.
Looking at the rfc 3261 grammar...
userinfo = ( user / telephone-subscriber ) [ ":" password ] "@"
user = 1*( unreserved / escaped / user-unreserved )
user-unreserved = "&" / "=" / "+" / "$" / "," / ";" / "?" / "/"
unreserved = alphanum / mark
mark = "-" / "_" / "." / "!" / "~" / "*" / "'"
/ "(" / ")"
'*' is part of the "mark" set which is part of "unreserved" which
is part of "user" which is part of "userinfo".
So, as you correctly say, a * does not require escaping.
Regards,
Attila
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Andrea Rizzi
Sent: 15 November 2007 08:23
To: [email protected]
Subject: Re: [Sip-implementors] Error in incoming req uri, what to do?
Attila,
The '*' char shall not be escaped IMO, this is allowed by RFC 2396 in
URI syntax. Have you references saying the '*' should be escaped?
Andrea
------------------------------
Message: 3
Date: Wed, 14 Nov 2007 15:11:41 -0600
From: Robert Sparks <[EMAIL PROTECTED]>
Subject: Re: [Sip-implementors] UAS sending a CANCEL
To: Jagan Mohan <[EMAIL PROTECTED]>
Cc: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
You're looking for RFC3261 section 9.
RjS
On Nov 14, 2007, at 6:04 AM, Jagan Mohan wrote:
> Hi All,
>
> I have the following call flow:
>
> PSTN===Media Gateway-----UAS
>
> Call flow is made from PSTN phone to UAS.
>
> Media --------------UAS
> Gateway
>
> INVITE-------->
> <--------100 Trying
> <--------180 Ringing
>
> At this point, can UAS send a CANCEL to the media gateway?
>
> From the discussion in various mailing lists, I understand that
> UAS can not send a CANCEL request in this scenario. It can send a
> 4xx/6xx
>
> But, I could not find any RFC which talks about this. Could any
> one please provide info. on the RFC which talks about the above
> scenario?
>
> TIA,
> Jagan
> _______________________________________________
> Sip-implementors mailing list
> [email protected]
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
------------------------------
Message: 4
Date: Wed, 14 Nov 2007 21:17:44 -0000
From: "Attila Sipos" <[EMAIL PROTECTED]>
Subject: Re: [Sip-implementors] Error in incoming req uri, what to do?
To: Andreas Bystr?m <[EMAIL PROTECTED]>,
<[email protected]>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"
I seem to remember some discussion about the # and # character a long
time ago.
You could respond with 400 Bad Request but I think it would be best if
you just treated it as if the # had been escaped. I know it's not
strictly compliant but:
1. I don't think it does any harm - check the grammar for yourself but I
don't
think there are any parser clashes
2. you will improve your interop - I have seen many UAs that haven't
escaped these characters - so it's best if you try to accept them.
One more thing - always escape the # and * if you use it in the user
part of a URI.
People over-use the saying "be liberal with what you accept and strict
with what you send" - I don't always agree with it because it's the road
to chaos but in this case I don't think it's harmful.
Regards,
Attila
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