[SR-Users] SIPT append_body_part \x00 how to?..

[Daniel-Constantin Mierla]

On 05.04.18 09:19, Sergey Basov wrote:
>
> > Are you doing msg_apply_changes before use of sipt_destination()?
>
> Yes I do.
>
> > Why you had to do changes inside sipt module and not inside
> append_body_part()?
> I have added line to debug append_body_part() function and it receives
> string till first \x00 in input...
>
> May be this problem goes from configuration parser? Can it parse \x00
> as end of value?
>
> I make change in sipt module because I create ISUP part with replaced
> \x00 by \x01 in 3 places.
> I know where they are incorrect, so I can change them to 00 while
> changing number using sipt_destination()
OK.

I haven't looked at the code to see how the config parser handles this
case, could be what you said.

A solution might be to add a new function append_body_part_hex(...)
where the parameter is given in hexadecimal without escaping and the
conversion to binary is done inside the code of the function. Like:

append_body_part("01 90 00 20")

Spaces can be omitted or ignored.

Cheers,
Daniel

>
>
> --
> Best regards,
> Sergey Basov                     e-mail: sergey.v.basov at gmail.com
> <mailto:sergey.v.basov at gmail.com>
>
> 2018-04-05 8:20 GMT+03:00 Sergey Basov <sergey.v.basov at gmail.com
> <mailto:sergey.v.basov at gmail.com>>:
>
>     Hi Daniel,
>
>     I think that kamailio while reading configuration think that \x00
>     character is the end of string..
>
>     --
>     Best regards,
>     Sergey Basov                     e-mail: sergey.v.basov at gmail.com
>     <mailto:sergey.v.basov at gmail.com>
>
>     2018-04-04 19:47 GMT+03:00 Daniel-Constantin Mierla
>     <miconda at gmail.com <mailto:miconda at gmail.com>>:
>
>         Hello,
>
>         I haven't looked at the source code, but it looks like it
>         needs some options to make it work with zero characters.
>
>         Why you had to do changes inside sipt module and not inside
>         append_body_part()?
>
>         Are you doing msg_apply_changes before use of sipt_destination()?
>
>         Cheers,
>         Daniel
>
>
>         On 04.04.18 16:19, Sergey Basov wrote:
>>         Hi All.
>>
>>         Does nobody have any idea how to avoid this?
>>
>>         Thank you.
>>
>>         --
>>         Best regards,
>>         Sergey Basov                     e-mail:
>>         sergey.v.basov at gmail.com <mailto:sergey.v.basov at gmail.com>
>>
>>         2018-04-03 17:07 GMT+03:00 Sergey Basov
>>         <sergey.v.basov at gmail.com <mailto:sergey.v.basov at gmail.com>>:
>>
>>             Hi All!
>>
>>             I have some troubles with encoding hex string to use as
>>             ISUP part.
>>
>>             I have next line:
>>
>>             append_body_part("\x01\x10\x48*\x00*\x0a*\x00*\x02\x09\x07\x03\x90\x90\x13\x71\x32\x20\x0a\x04\x02\x13\x73\x12*\x00*","application/isup;version=itu-t92+","signal;handling=optional");
>>
>>             Problem is in the *\x00 *kamailio reads this string till
>>             first \x00
>>
>>             May be there is some workaround?
>>
>>             Currently I have added some C code into SIPT module to
>>             change values in this pisitions first to 00 then make
>>             other changes.
>>
>>             My current input string is
>>             append_body_part("\x01\x10\x48*\x01*\x0a*\x01*\x02\x09\x07\x03\x90\x90\x13\x71\x32\x20\x0a\x04\x02\x13\x73\x12*\x01*","application/isup;version=itu-t92+","signal;handling=optional");
>>
>>             I first make replacement \x01 to \x00 while executing
>>             sipt_destination
>>
>>             May be there is better solution?
>>
>>             Thank you.
>>             --
>>             Best regards,
>>             Sergey Basov                     e-mail:
>>             sergey.v.basov at gmail.com <mailto:sergey.v.basov at gmail.com>
>>
>>
>>
>>
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>
>         -- 
>         Daniel-Constantin Mierla
>         www.twitter.com/miconda <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
>         Kamailio Advanced Training - April 16-18, 2018, Berlin - www.asipto.com <http://www.asipto.com>
>         Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com <http://www.kamailioworld.com>
>
>
>

-- 
Daniel-Constantin Mierla
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - April 16-18, 2018, Berlin - www.asipto.com
Kamailio World Conference - May 14-16, 2018 - www.kamailioworld.com

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