[SIPForum-discussion] [SIP-Forum discussion] Support of # into Request-Uri

[Federico piesio]

Dear all,

thank you very much for your help.
Following Amit's last mail, I can say that as in RFC 2396 # is not supported
as R-Uri and must be replaced. What the vendor is wrong about is replacing #
with C and not with %23. Am I wrong?

Thank you
Federico

2010/12/3 AMIT ANAND <amiit.anand at gmail.com>

> Hi Federico,
>
> Your vendor is correct, see the below from RFC 3261
>
> *SIP follows the requirements and guidelines of RFC 2396 [5] when
>    defining the set of characters that must be escaped in a SIP URI, and
>
>    uses its ""%" HEX HEX" mechanism for escaping.  From RFC 2396 [5]:
>
>       The set of characters actually reserved within any given URI
>       component is defined by that component.  In general, a character
>
>       is reserved if the semantics of the URI changes if the character
>       is replaced with its escaped US-ASCII encoding [5].  Excluded US-
>       ASCII characters (RFC 2396 [5]), such as space and control
>       characters and characters used as URI delimiters, also MUST be
>
>       escaped.  URIs MUST NOT contain unescaped space and control
>       characters.
>
> Now from RFC 2396.
>
>
> The character "#" is excluded
>    because it is used to delimit a URI from a fragment identifier in URI
>
>    references (Section 4). The percent character "%" is excluded because
>
> AND
>
> Data corresponding to excluded characters must be escaped in order to
>    be properly represented within a URI.it is used for the encoding of escaped character*.
>
> *
> *So # should get replaced with %hexvalue of # which is 23 so # should be replaced with %23
> *
>
> *
>
>
>
> On Wed, Dec 1, 2010 at 9:06 PM, Federico piesio <fede.legge at gmail.com>wrote:
>
>> Dear members,
>> I have one doubt regarding use of digit # into R-Uri. The vendor of Class4
>> softswitch is saying that RFC 3261 specifies that # is not supported as a
>> digit in a sip uri or tel uri, so their implementation is that softswitch
>> receives a R-Uri containing # and changes digit "#" with extradecadic "C"
>> when sending ahead the INVITE.
>>
>> Does anyone know about this limitation in SIP? I'm really not sure of what
>> vendor states about. I didn't find anything about in 3261 or 2806.
>>
>> Thank you
>> Regards
>> Federico
>>
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>
>
> --
> Thanks
> Amit Anand
>
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