19 May
2003
19 May
'03
4:36 p.m.
Hello,
comments inline.
On 5/19/2003 1:39 PM, anna wrote:
Thank you very much for quick answers, one more
question though, I
really need to get around this problem.
Is it possible to translate the buddy list into SIP and get the
status/presence messages sent to the sip client in a notify message
WITHOUT sending all these subscibe(´s).
I am afraid it is not. The NOTIFY must be sent in the same dialog as the
SUBSCRIBE.
Jabber send this big load of buddies to the Ser (see
bellow in
highlighted *2), who now just ignores them, but what if we split up
all these buddies and send them in notify´s to the client.
Question: is it possible to send a lot of notify´s without sending
subscribe to SER first.
The NOTIFYs are sent only when the SIP clients request that. Once the
SIP client has no dialog to match a NOTIFY it will drop the message
(sending back 481 Call/Transaction Does Not Exist). I have not tested
with many SIP UACs, but for MSN Messenger is like that. You can tested
by yourself, there is a tool 'udp_flood' which can send SIP messages
from a file to a specific destination. You can find its sources in
'test' subdirectory -- to compile it just go in the directory and use
'gcc -o udp_flood udp_flood.c'. Giving -h option you are displayed a
small help and you can find sample SIP messages in the same directory,
too. Adapt one for your scenario and test to see if there is some SIP UA
that accepts NOTIFYs outside a dialog.
Best regards,
Daniel