On Wed, Sep 17, 2014 at 12:12 AM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:

Thanks for replying !

But how to check whether a particular message received by Kamailio was sent by UAC or SIP Server ?

Also, on the same lines - how to know whether a particular message about to be send from Kamailio is bound to UAC or SIP Server ?

On Tue, Sep 16, 2014 at 10:51 PM, Muhammad Shahzad <shaheryarkh@gmail.com> wrote:

Hi,

The network io intercept feature basically allows kamailio script writer to do whatever s/he may want to do with raw SIP packets (that are just received by kamailio or about to be sent out by kamailio), e.g. encryption, compression or any final touches to sip message before it is processed by kamailio core. That is why it is purposely kept abstract and any particular use or implementation is left to the script writer.

In your case the encryption / decryption code is in C/C++, you can try one of the followings,

1. Writeup a C/C++ program that receives outgoing SIP message as text (and some other parameters, e.g. encryption key) in input arguments and returns the encrypted message in event_route [ network:msg ] and vice versa (for incoming messages). You can call this program directly from kamailio.cfg script.

2. Writeup e.g. a PERL wrapper for your encryption / decryption C/C++ code and call it using kamailio app_perl module within event_route [ network:msg ] as demonstrated in this example,

http://kamailio.org/docs/modules/devel/modules/corex.html#idp125704

You can also use any other kamailio language bind of you choice as well, e.g. Python, LUA, JAVA and so on.

I would recommend the second option, as it has less processing overhead for kamailio.

Thank you.

On Tue, Sep 16, 2014 at 6:09 PM, Rahul MathuR <rahul.ultimate@gmail.com> wrote:

Hello,

I was going through the new features and stumbled upon this new one - developed by Mohd. Shahzad Shafi.

As already mentioned on the wiki about this module, I intend to use it for my custom security layer between UACs and SIP Proxy (Kamailio) but the issue is - the custom security layer (encryption/decryption code) is written in C and should precisely be applied for the messages between UAC and Proxy.

Is there a way I can achieve this using Corex module since it does intercept the network I/O messages ?

Any help here would be really appreciated.

--
Warm Regds.
MathuRahul

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Warm Regds.
MathuRahul

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Warm Regds.
MathuRahul