On 8/14/20 10:25 AM, Maxim Sobolev wrote:
Paul, there is no space between colon and the rest of the call-id in the
original example provided. So UAC seems to be doing the right thing I think.
Call-ID: :VaT4082403130oFbc
<mailto:vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org>...
OK. If there is no space then I agree that the UAC is doing nothing wrong.
Thanks,
Paul
-Max
On Thu., Aug. 13, 2020, 8:15 a.m. Paul Kyzivat, <pkyzi...@alum.mit.edu
<mailto:pkyzi...@alum.mit.edu>> wrote:
Pravin, Gaurav,
On 8/13/20 5:34 AM, Pravin Kumar wrote:
> Hi Gaurav,
>
> You can refer to RFC3261 Call-ID ABNF syntax section:
>
> [RFC3261 - page 228]
>
> Call-ID = ( "Call-ID" / "i" ) HCOLON callid
> callid = word [ "@" word ]
>
> [RFC3261 - page221]
>
> word = 1*(alphanum / "-" / "." / "!" / "%" / "*" /
> "_" / "+" / "`" / "'" / "~" /
> "(" / ")" / "<" / ">" /
> ":" / "\" / DQUOTE /
> "/" / "[" / "]" / "?" /
> "{" / "}" )
>
> If you observe here ":" is allowed in call-id irrespective to
position. So
> in your case UAS behaviour is not correct to remove the ":". -pravin
I agree that colon is allowed in call-id, but whitespace is not. So it
appears to me that the UAC has erred.
Exactly what the UAS should do in this case is not defined. I would
suggest you either:
1) reject the request with a 400 response
2) ignore the error and use the call-id as-is
The fact that your uas ignored the colon suggests to me that its parser
is acting in an unjustified way. (Ad hoc parsing?)
Thanks,
Paul
> On Thu, Aug 13, 2020 at 2:30 PM Gaurav Khare
<gaurav.kh...@onmobile.com <mailto:gaurav.kh...@onmobile.com>>
> wrote:
>
>> Hi,
>>
>> I have a specific problem relating to SIP header format.
>>
>> A UAC is sending Call-ID Header in INVITE as below
>> Call-ID: :
>>
vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org
<mailto:vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org>
>>
>> My UAS is sending 180 Ringing response as
>> Call-ID:
>>
vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org
<mailto:vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org>
>> <mailto:
>>
vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org
<mailto:vat4082403130ofbcghefckco...@mscsma1.ims.mnc007.mcc748.3gppnetwork.org>>
>>
>> Notice the two colons in UAC request. In the response my stack
is ignoring
>> additional Colon(:) but the response is rejected by UAC. I am
perplexed as
>> to if colon(:) can be a part of Call-ID value or if two
Colons(:) can occur
>> sequentially delimiting Header name and value.
>>
>> If someone can point me to a Section of RFC, it will be very
helpful.
>>
>> Thanks in advance,
>> Gaurav Khare
>>
>>
>>
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