On 30.03.18 13:49, Eugene Prokopiev wrote:
Tried to do the same and even less with KEMI/Lua:
$ cat kamailio/config/kamailio.lua
function ksr_request_route() KSR.info("Lua route\n") if (KSR.textops.has_body("application/isup")) { KSR.info("ISUP body exists\n") } local opv = "" KSR.textops.get_body_part("application/isup", opv)
The second parameter above must be a string with the name of a kamailio variable, not a Lua variable, like "$var(x)".
Cheers, Daniel
KSR.info("ISUP body content : "..opv.."\n") KSR.sl.send_reply(503, "Server not configured")end
I see only endless loop as result:
... kamailio_1 | 12(18) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(16, 0x7f82df873580, 0, 5000): Invalid argument [22] kamailio_1 | 12(18) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(16, 0x7f82df873580, 0, 5000): Invalid argument [22] kamailio_1 | 12(18) ERROR: <core> [core/io_wait.h:1040]: io_wait_loop_epoll(): epoll_wait(16, 0x7f82df873580, 0, 5000): Invalid argument [22] ...
Result is not good without 'if (KSR.textops.has_body(...' too:
kamailio_1 | 1(7) INFO: <core> [core/kemi.c:91]: sr_kemi_core_info(): Lua route kamailio_1 | 1(7) ERROR: <core> [core/pvapi.c:416]: pv_cache_get(): invalid parameters kamailio_1 | 1(7) ERROR: textops [textops.c:2560]: ki_get_body_part(): failed to get pv spec kamailio_1 | 1(7) INFO: <core> [core/kemi.c:91]: sr_kemi_core_info(): ISUP body content :
What is wrong in my code?
2018-03-29 21:53 GMT+03:00 Eugene Prokopiev enp@itx.ru:
Tried to use get_body_part and isup_to_json first, but looks like I can't understand syntax. My config:
loadmodule "tm.so" loadmodule "sl.so" loadmodule "xlog.so" loadmodule "textops.so" loadmodule "ss7ops.so"
listen=udp:0.0.0.0:5060
route { get_body_part("application/isup", "$var(pbody)"); isup_to_json(8); xlog("$isup(1)\n"); sl_send_reply("503", "Server is not configured"); }
Can't even run it due to:
kamailio_1 | 0(1) ERROR: textops [textops.c:2615]: fixup_get_body_part(): failed to fixup result pvar kamailio_1 | 0(1) ERROR: <core> [core/route.c:1154]: fix_actions(): fixing failed (code=-1) at cfg:/etc/kamailio/kamailio.cfg:10 kamailio_1 | error -1 while trying to fix configuration
Can you show me working example with get_body_part and isup_to_json and json dump to stdout?
2018-03-29 18:21 GMT+03:00 Daniel-Constantin Mierla miconda@gmail.com:
As I got it, there is an ISUP parser inside ss7ops module.
It may require a bit of C coding to build a function for helping with what you need -- the two functions that are useful for doing it are:
https://www.kamailio.org/docs/modules/stable/modules/textops.html#textops.f....
https://www.kamailio.org/docs/modules/stable/modules/ss7ops.html#ss7ops.f.is...
The first one shows how to extract the part of the body from the sip message with the ISUP, the second one shows to convert the ISUP data to json. From there you can use jansson module to extract fields.
If you are not familiar with C coding, open a feature request on kamailio issue tracker on github.com, maybe someone can get to it soon, otherwise I will look at it when I get a chance.
The other option right now is to use some Python or Lua script to do the parsing of ISUP there, maybe there are libraries for it in those languages. You get get the body of the SIP message inside these messages using $rb variable or the textops function via KSR KEMI module:
http://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/kemimods/#k...
http://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/modules/#ks...
Cheers, Daniel
On 29.03.18 12:50, Eugene Prokopiev wrote:
I can attach screenshot of ISUP part of pcap.
Is it possible to extract all ISUP parameters or at least 'Redirecting number' or 'Called IN number'? Can extract ISUP part as is in binary form and read by some external script? Are you know about any library to parse ISUP binary data?
2018-03-29 11:30 GMT+03:00 Daniel-Constantin Mierla miconda@gmail.com:
Hello,
can you provide a pcap (or ngrep output) with such invite in order to see what can be done with existing modules? Maybe it needs just some script operations.
Cheers, Daniel
On 28.03.18 17:26, Eugene Prokopiev wrote:
Hi,
I need to extract ISUP parameter 'Redirecting number' from SIP-I INVITE request and add it as SIP header with 'X-' prefix to process in FreeSWITCH. I tried to read https://kamailio.org/docs/modules/5.1.x/modules/sipt.html (but it is about updating headers) and https://kamailio.org/docs/modules/5.1.x/modules/ss7ops.html (but I have only ISUP encapsulated in SIP), so not found any solution. Help me to find it please.
-- 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
-- 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
-- WBR, Eugene Prokopiev