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

[Marco Capetta]

HiAll,

As additional step I tested the scenario with kamailio v5.1.5 but the 
problem seems still there.

Best regards.
Marco


On 08/28/2018 03:10 PM, Marco Capetta wrote:
>
> 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
>