16 apr 2012 kl. 15:31 skrev Matthew Jordan:
> It's not a bug - decrementing the CSeq header field value is directly in
> violation of RFC 3261. From section 22.2:
>
> When a UAC resubmits a request with its credentials after receiving a
> 401 (Unauthorized) or 407 (Proxy Authentication Required) response,
> it MUST increment the CSeq header field value as it would normally
> when sending an updated request.
This only applies to the same dialog. The question here is if it is the
same dialog. If it is, then the server indeed has a bug.
Check the Call-ID and the from tag of both requests.
/Olle
> ----- Original Message -----
>> From: "Benoit Panizzon" <benoit.panizzon@xxxxxx>
>> To: asterisk-users@xxxxxxxxxxxxxxxx
>> Sent: Monday, April 16, 2012 7:12:09 AM
>> Subject: Invite + decreasing sequence number => 500 Error?
>>
>> Hi out there
>>
>> We have a strange Problem here with invites.
>>
>> We observe this SIP conversation.
>>
>> C3 PBX <-> Asterisk
>>
>> Case 1. Sequence Numer always increasing:
>>
>> => Invite
>> <= 401 Unauthenticated
>> => Invite+auth with sequence number > previous Invite.
>> <= 100 Trying etc. Works OK.
>>
>> Case 2. Sequence Number decreasing.
>>
>> => Invite
>> <= 401 Unauthenticated
>> => Invite+auth with sequence number < previous Invite.
>> <= 500 ERROR
>>
>> I was browsing the SIP rfc and I cannot find any clue if in this case
>> the
>> sequence numbers must be increasing (the C3 PBX is wrong) or if I
>> have sumbled
>> over an asterisk bug.
>>
>> Is there anyone who knows?
>>
>> Benoit Panizzon
>> --
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