[SR-Users] Issue while initiating database of my new module in kamailio

[Jagdeep S]

Hi Daniel,

Thanks for the reply. I was just seeing differences in various module
initialization over the weekend and saw that the exports structure was
slightly different from what i had taken from the template in the
kamailio website. I think the extra parameters/methods added in the
latest versions were missing in my exports structure due to which my
initialization used to fail. And during initialization i pass "pseudo
variable" as argument to my method but i was not  having the pseudo
variable member in the structure. Since it was not initialized the db
initialization failed.

I just changed the following structure from:

struct module_exports exports= {
  "mymodule",	/* module's name */
  DEFAULT_DLFLAGS, /*!< dlopen flags */
  cmds,          /* exported functions */
  mod_params,    /* param exports */
  mod_stats,     /* exported statistics */
  mod_init,      /* module initialization function */
  0,             /* reply processing function FIXME Not sure when this
is used */
  mod_destroy,   /* Destroy function */
  child_init     /* per-child init function */
};

to the following structure:
struct module_exports exports= {
       "mymodule",   /* module's name */
        DEFAULT_DLFLAGS, /* dlopen flags */
        cmds,       /* Exported functions */
        mod_params, /* Exported parameters */
        mod_stats,  /* exported statistics */
        0,          /* exported MI functions */
        0,          /* exported pseudo-variables */
        0,          /* extra processes */
        mod_init,   /* module initialization function */
        0,          /* response function */
        mod_destroy,/* destroy function */
        child_init  /* child initialization function */
};

Now i am able to start the kamailio server with db initialized :)
Anyways thanks for the response.

Regards,
Jagdeep S



On 12/6/11, Daniel-Constantin Mierla <miconda at gmail.com> wrote:
> Hello,
>
> can you paste here the mod_init() and child_init() functions and say
> which one is line 239 (inside child init)? I expect some db init step
> for your module was not done.
>
> Also, the output of 'bt full' might be useful.
>
> Cheers,
> Daniel
>
> On 12/3/11 6:35 AM, Jagdeep S wrote:
>> Hi All,
>>
>> I am trying to create a new module under the kamailio source base, as
>> part of understanding the framework. But when i start the Kamailio, i
>> am seeing a core dump occuring when my new module is getting initiated
>> and when the database is getting initialised. PFA the files attached
>> containing the config file and source files used for creating module
>> files.
>>
>> I am using the "DEFAULT_DB_URL" as database uri. The core dump
>> backtrace shows that the module init fails at the following point:
>> (gdb) bt
>> #0  0x00000000 in ?? ()
>> #1  0x00ef390d in child_init (rank=9172352) at my_mod.c:239
>> #2  0x081226be in init_mod (m=0xb7515a04) at sr_module.c:922
>> #3  0x08122630 in init_mod (m=0xb7515c78) at sr_module.c:919
>>
>> The line 239 in my module file points to the child-init function which
>> initializes the database connectivity ==>  "mymod_dbh =
>> mymod_dbf.init(&db_url);"
>>
>> I have written the module using the template provided under the
>> kamailio website. All the parameters are defined properly. Have no
>> idea as to what is going wrong.
>>
>> I tried debugging the core dump using gdb but of no much help. I am
>> not able to run the gdb during runti sr-users at lists.sip-router.orgme
>> due to which i am not able to add break points and check. Not sure
>> what the problem is. That's why i generated core dump file and
>> analysed the backtrace, but i can't add break points and run it again
>> as the executable is not involved.
>>
>> Can anyone please let me know what is the issue is or any pointers if
>> i have missed some part of the code due to which the connectivity to
>> db is not happening. Due to this i am not able to proceed further with
>> the testing of my new module. Also any tips on how to do get the gdb
>> debugging during runtime will also be very helpful.
>>
>> Any help is appreciated :).
>>
>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
> --
> Daniel-Constantin Mierla -- http://www.asipto.com
> http://linkedin.com/in/miconda -- http://twitter.com/miconda
>
>


-- 
Jagdeep S