18 Dec
2021
18 Dec
'21
9:08 a.m.
Hello,
Let' me describe the scenario:
<UE>---------><SEMS>-----------><ASTERISK>
The UE tries to make calls, The first INVITE message is without an
Authentication header. The Asterisk server returns 401 Unauthorized.
The UE sends again INVITE messages to the asterisk server. The second
INVITE message has an Authentication header. Because both INVITE messages
have the same CSeq, the asterisk server thinks this is a LOOP message and
sends 401 Unautirozed messages again.
In both cases, the Sems set "CSeq: 10 INVITE" header, while the second the
INVITE message is not re-invite message and the CSeq should be set
incremental.
On Sat, Dec 18, 2021 at 11:15 AM Juha Heinanen <jh(a)tutpro.com> wrote:
Mojtaba writes:
--
--Mojtaba Esfandiari.S
Yes, all other headers are supported. But I
don't know why in the Invite
message, the value of CSeq is not changed, and all invite messages have
10
INVITE. This caused the asterisk server could not
pass the Authentication
process.
Are you saying that re-INVITEs have the same CSeq value as the intial
INVITE?
In initial INVITEs CSeq can have any value:
8.1.1.5 CSeq
For non-REGISTER requests
outside of a dialog, the sequence number value is arbitrary.
-- Juha
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