[SR-Users] Missing ACC record in case of canceled call forking

[Marco Capetta]

Hi All,

I'm facing a strange problem of missing ACC record in case of parallel 
call forking.

The scenario is the following:
  - A subscriber with 1 device registered
  - B subscriber with 2 device registered (B1 and B2)

CASE 1:
  - A calls B
  - B1 and B2 start ringing
  - A hangups the call before B1 or B2 answers
Kamailio generates an ACC record.

CASE 2:
  - A calls B
  - B1 and B2 start ringing
  - B1 rejects the call sending back a 486
  - B2 is still ringing
  - A hangups the call before B2 answers
Kamailio DOESN'T generate an ACC record.



We have Kamailio v5.1.4 with TM module enabled.

ACC configuration is the following:
   modparam("acc", "early_media", 0)
   modparam("acc", "report_ack", 0)
   modparam("acc", "report_cancels", 1)
   modparam("acc", "detect_direction", 1)
   modparam("acc", "db_flag", 1)
   modparam("acc", "db_missed_flag", 2)
   modparam("acc", "failed_transaction_flag", 3)


I increased debug level of TM and ACC modules and I added some debug 
lines as well.
The difference between the two calls is that, after the CANCEL sent by A 
is processed by Kamailio, in CASE 1 I have the following lines:
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: tm [t_hooks.c:258]: 
run_trans_callbacks_internal(): DBG: trans=0x7f5a88049198, callback type 
512, id 0 entered
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: acc [acc_logic.c:670]: 
tmcb_func(): acc callback called for t(0x7f5a88049198) event type 512, 
reply code 487
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: acc [acc_extra.h:63]: 
free_strar_mem(): Freeing memory, type is 2, message_index 8, index i 0
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: acc [acc_extra.h:63]: 
free_strar_mem(): Freeing memory, type is 2, message_index 8, index i 1
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: acc [acc_extra.h:63]: 
free_strar_mem(): Freeing memory, type is 2, message_index 8, index i 2
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: acc [acc_extra.h:63]: 
free_strar_mem(): Freeing memory, type is 2, message_index 8, index i 3
   Aug 28 14:21:11 spce proxy[13188]: DEBUG: acc [acc_extra.h:63]: 
free_strar_mem(): Freeing memory, type is 2, message_index 8, index i 4

Those debug lines are not printed for CASE 2.



Is there any configuration I'm missing or is it a bug?



Thank you very much for your support.
Marco