Re: [SR-Users] Use AVP as regex in avp_subst

Hi Alex, :) I was just trying to keep it simple, but let me explain a little bit. I'm using a Proxy+RTPProxy in mhomed mode. I have a public and a private IP on that Proxy and route calls in and out of a network. As I have many carriers that want different ANI and DNIS patterns I have to deal with some flexible configuration. So I created a table where I hold a special regex rule for each of them and then I get the regex in realtime (with SQLOps) into an AVP ($avp(s:carrierAniRegex)). Then I get the ANI for the incoming leg and store it on an AVP ($avp(s:ANI)). When I execute this regex I get the new ANI to replace in FROM, RPID and PAI. To be honest it's actually more complex because in a per carrier basis, I configure if I'll use a fix ANI, a REGEX edited one or I'll leave it transparently. :) If someone would like to do something similar, I'll be glad to share scripts and configs. Best regards, Uriel On Thu, Jul 8, 2010 at 12:35 PM, Alex Balashov <abalashov(a)evaristesys.com> wrote: > There may be an easier and more elegant and more performant way to > accomplish what you are trying to accomplish, but we cannot know without > seeing the pattern and the regex. :) > > -- > Alex Balashov - Principal > Evariste Systems LLC > 1170 Peachtree Street > 12th Floor, Suite 1200 > Atlanta, GA 30309 > Tel: +1-678-954-0670 > Fax: +1-404-961-1892 > Web: http://www.evaristesys.com/ > > On Jul 8, 2010, at 10:30 AM, Uriel Rozenbaum<uriel.rozenbaum(a)gmail.com> > wrote: > >> Hi Daniel, >> >> Actually I'm going to partially take your advice, implementing the >> following: >> >> exec_avp("echo '$avp(s:ANI)' | sed '$avp(s:carrierAniRegex)'", >> "$avp(s:ANIegress)"); >> >> I'll check for performance issues later but surely this simplifies a >> lot the config. >> >> Thanks! >> Uriel >> >> On Thu, Jul 8, 2010 at 5:55 AM, Daniel-Constantin Mierla >> <miconda(a)gmail.com> wrote: >>> >>> Hello, >>> >>> On 7/7/10 11:06 PM, Uriel Rozenbaum wrote: >>>> >>>> Hey guys, >>>> >>>> I'm using Kamailio 1.5.3-notls and need to apply some re operation to an >>>> AVP. >>>> >>>> The problem I have is that my re expression is held in an AVP, so the >>>> parser is not recognizing it :( >>>> >>>> Would it be very hard to change that behavior? Any ideas/tips to >>>> implement? >>>> >>>> This code >>>> route[16] >>>> { >>>> ... >>>> avp_subst("$avp(s:ANI)/$avp(s:ANIegress)", "$avp(s:carrierAniRegex)"); >>>> ... >>>> } >>>> >>>> returns this error >>>> ERROR:avpops:fixup_subst: avpops: bad subst re $avp(s:carrierAniRegex) >>>> >>>> This code >>>> route[16] >>>> { >>>> ... >>>> avp_subst("$avp(s:ANI)/$avp(s:ANIegress)", $avp(s:carrierAniRegex)); >>>> ... >>>> } >>>> >>>> returns this error >>>> CRITICAL:core:yyerror: parse error in config file, line 751, column >>>> 51-74: syntax error >>>> CRITICAL:core:yyerror: parse error in config file, line 751, column >>>> 74-75: bad arguments >>>> >>>> Do you think some other way I can achieve this? Be aware I'm using >>>> SQLops to get realtime the value of the expression... >>>> >>> >>> avp_subst() cannot help here, there is no support for taking the >>> substitution expression from a variable. >>> >>> What you can do in 1.5 is either look at dialplan to see if it fits your >>> needs (it can do such substitution with expressions taken from db at >>> startup, which can be reloaded at runtime), otherwise try using perl >>> module >>> (or exec in 1.5+ and lua/python in devel). >>> >>> Cheers, >>> Daniel >>> >>> -- >>> Daniel-Constantin Mierla >>> http://www.asipto.com/ >>> >>> >> >> _______________________________________________ >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list >> sr-users(a)lists.sip-router.org >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >