[sr-dev] ACC events missing to-tag when doing t_reply

Julien Chavanton jchavanton at gmail.com
Sat Aug 1 00:26:27 CEST 2020


I can not find the explanation on why the data memory is different once I
return from the function.
This is the same process and the same memory address.

code :

void get_rpl_totag(struct cell *t, struct sip_msg *reply, str *totag) {
        if (reply==FAKED_REPLY || !reply || !reply->to) {
                tmb.t_get_reply_totag(t->uas.request, totag);
        }
        if (totag && totag->s) {
                LM_ERR("reply_totag ok [%p][%d][%*.s]\n", totag->s,
totag->len, totag->len, totag->s);
        }
}

str ttag = STR_NULL;
get_rpl_totag(t, reply, &ttag);
LM_ERR(">>> to-tag[%p][%d][%.*s]\n", acc_env.to_tag.s, acc_env.to_tag.len,
acc_env.to_tag.len, acc_env.to_tag.s);


outputs :

 0(25216) ERROR: acc [acc_logic.c:97]: get_rpl_totag(): reply_totag ok
[0x7fa6a79d81e0][41][                                         ]
 0(25216) ERROR: acc [acc_logic.c:525]: on_missed(): >>>>>>>>>>>
to-tag[0x7fa6a79d81e0][41][594d50c3218065a60bb91fd47a70fbc1-857d6855]






On Fri, Jul 31, 2020 at 8:33 AM Julien Chavanton <jchavanton at gmail.com>
wrote:

> Seems to work, I will complete the modifications and make an MR ...
>
> On Fri, Jul 31, 2020 at 12:30 AM Julien Chavanton <jchavanton at gmail.com>
> wrote:
>
>> I can see TM API is exposing
>>
>> tmb.t_get_reply_totag(msg, &to_tag);
>>
>> looking at what can be done from acc_logic.c
>>
>> on_missed
>>
>> /* set env variables */
>> env_set_to( get_rpl_to(t,reply) );
>> env_set_code_status( code, reply);
>> ...
>>
>> On Thu, Jul 30, 2020 at 11:51 PM Julien Chavanton <jchavanton at gmail.com>
>> wrote:
>>
>>> Hi, considering this example :
>>>
>>>
>>> modparam("acc_json", "acc_missed_flag", 6)
>>>
>>> failure_route[test] {
>>>     setflag(6); // MISSED_ACC, the failure will be recorded by ACC
>>>     t_flush_flags(); // This will set the flags in the newly created transaction
>>>     t_reply("500", "Service Unavailable");
>>> }
>>>
>>> This does generate an ACC event, however the to-tag is not populated, my guess this is because the TM callback is done before the to-tag is generated.
>>>
>>> I wonder if there is a way to populate the to-tag immediately ?
>>>
>>> I will dig it further, but maybe there is a trick I am missing
>>>
>>>
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