[SR-Users] Expire timeout for notify message answer

[Victor Litvinov]

Hello dear community.

We use a presence module with the enabled option "timeout_rm_subs". And we
face issues that subscriptions remove too early. We expect that it will be
removed after the fr_timer, but it is removed after 1 second.

We I can see in log (i'm add additional logs):
when we send NOTIFY:
tm [timer.c:491]: retr_buf_handler(): timer retr_buf_handler @1436309038
(timer_ln 0x7f4708f45bd0 -> rbuf 0x7f4708f45bb0 -> [0x7f4708f458a0 <->
11592:145228
527])
tm [timer.c:492]: retr_buf_handler(): fr_expire 1436309054  T1 4000  T2
4000 fr_timeout 80
tm [timer.c:536]: retr_buf_handler(): new interval 4000 ms / 64 ticks (max
4000 ms)

when timer expire:
tm [timer.c:491]: retr_buf_handler(): timer retr_buf_handler @1436309054
(timer_ln 0x7f4708f45bd0 -> rbuf 0x7f4708f45bb0 -> [0x7f4708f458a0 <->
11592:145228
527])
tm [timer.c:492]: retr_buf_handler(): fr_expire 1436309054  T1 4000  T2
4000 fr_timeout 80
tm [timer.c:367]: final_response_handler(): transaction [0x7f4708f458a0 <->
11592:145228527] scheduled for deletion
tm [timer.c:424]: final_response_handler(): stop retr. and send CANCEL
(0x7f4708f458a0)

and then subscription remove.

As we can see the fr_expire variable was set to ticks+16 ( 1 second). And
another strange thing that T1 and T2 timers are the same.

So the question is if this behaviour is correct, how can we configure the
presence module fr_timer as an expiration value for the answer to notify?
And can we use it without retransmissions?
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