Hey,
How does SER updates a user location?
For exemple, upon the first REGISTER message, it keeps the location of the user in a database or so. But this entry has a expire time.
How is this expire time updated? SER updates it upon receiving another SIP REGISTER or OPTIONS messages?
I know that this update is done, but I am quite confusing about how it is done.
Thanks
Felipe
Felipe Louback wrote:
Hey,
How does SER updates a user location?
For exemple, upon the first REGISTER message, it keeps the location of the user in a database or so. But this entry has a expire time.
How is this expire time updated? SER updates it upon receiving another SIP REGISTER or OPTIONS messages?
the expiry time will be updated on the next successful REGISTER from the client.
Keep alive messages (CRLF or OPTIONS) do not update the contact.
regards klaus
I started a client and let a sniffer running to observe the traffic.
At the initial REGISTER, there is an Expire: 3600 in the header. That is, after 3 minutes the registration "should" expire.
Taking a look at the sniffed traffic, even after 5 minutes, not even one REGISTER is sent. I see only OPTIONS probes sent by the server and SUBSCRIBE packets sent by the UA. But for every SUBSCRIBE it is sent a 401 back.
Is REGISTER really the only way for the UA to update its registration?
I read the RFC 3261 and there it says that REGISTER packets should refresh the registration, but I am not seeing this in practice.
Thanks for your help,
Felipe Louback
On 7/3/07, Klaus Darilion klaus.mailinglists@pernau.at wrote:
Felipe Louback wrote:
Hey,
How does SER updates a user location?
For exemple, upon the first REGISTER message, it keeps the location of the user in a database or so. But this entry has a expire time.
How is this expire time updated? SER updates it upon receiving another SIP REGISTER or OPTIONS messages?
the expiry time will be updated on the next successful REGISTER from the client.
Keep alive messages (CRLF or OPTIONS) do not update the contact.
regards klaus
Actually, my mistake. Expire:3600 means 30 minutes...
I let a sniffer running for over 2 hour and before 3600 seconds the UA refresh its bindings. If the UA wanna leave, it send a REGISTER with a expire=0 in the contact header, and then the server clean up that registration.
I forced one UA to leave the network without sending the REGISTER with an expire=0. Although the UA was not in the network anymore, it was still on SER database until the 3600 seconds of the initial registrations expired.
Felipe Louback
On 7/3/07, Felipe Louback louback@gmail.com wrote:
I started a client and let a sniffer running to observe the traffic.
At the initial REGISTER, there is an Expire: 3600 in the header. That is, after 3 minutes the registration "should" expire.
Taking a look at the sniffed traffic, even after 5 minutes, not even one REGISTER is sent. I see only OPTIONS probes sent by the server and SUBSCRIBE packets sent by the UA. But for every SUBSCRIBE it is sent a 401 back.
Is REGISTER really the only way for the UA to update its registration?
I read the RFC 3261 and there it says that REGISTER packets should refresh the registration, but I am not seeing this in practice.
Thanks for your help,
Felipe Louback
On 7/3/07, Klaus Darilion klaus.mailinglists@pernau.at wrote:
Felipe Louback wrote:
Hey,
How does SER updates a user location?
For exemple, upon the first REGISTER message, it keeps the location of the user in a database or so. But this entry has a expire time.
How is this expire time updated? SER updates it upon receiving another SIP REGISTER or OPTIONS messages?
the expiry time will be updated on the next successful REGISTER from the client.
Keep alive messages (CRLF or OPTIONS) do not update the contact.
regards klaus
-- Master Student - Electrical Engineering Department Computer Engineering and Telecommunications Research Group Universidade Federal de Minas Gerais - Brazil
"Come to me, all you who are weary and burdened, and I will give you rest." Matthews 11:28
"Failure is the opportunity to begin again more intelligently." Henry Ford
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Felipe Louback -
Klaus Darilion