Hello Michael, There are internal API functions which handle pseudovariable interpolation in string arguments, e.g. pv_get_spec_value().
You can see one-off uses of this for example in the fixup functions (functions which preliminarily process and validate arguments, often, but not always beginning with w_, for "wrapper"). You can see how this works in the 'uac' module, for example: https://github.com/kamailio/kamailio/blob/master/src/modules/uac/auth.c#L266 But in my opinion, the most sensible packaging of this functionality is done in the dispatcher module. You'll note that ds_select_*() share a wrapper called w_ds_select_addr(): https://github.com/kamailio/kamailio/blob/master/src/modules/dispatcher/dispatcher.c#L549 There is this nice macro, proprietary to the dispatcher module, called GET_VALUE(): https://github.com/kamailio/kamailio/blob/master/src/modules/dispatcher/dispatcher.c#L560 That's defined here: https://github.com/kamailio/kamailio/blob/master/src/modules/dispatcher/dispatcher.c#L507 And it takes advantage of a core API function called get_is_fparam(): https://github.com/kamailio/kamailio/blob/master/src/core/sr_module.c#L1656 As you can see, it can evaluate all kinds of interpolated values. So, I'd just use that. -- Alex On Fri, Dec 13, 2019 at 12:10:02PM -0600, Michael Iedema wrote: > Hi all, > > I’m trying to write a basic Kamailio module from scratch and have run into an > area where I’m in need of a couple pointers (pun not intended). :-) I have > the module loading correctly and can call a function in my routing script > like this: > > mymod_getinfo(“5551234”); > > This, for now, just triggers a print of the submitted parameter. > > What I’d like to do next is have it accept and print the From URI in > configuration script like so: > > mymod_getinfo(“$fU”); > > For now, this prints the string literal of “$fU” and I’m trying to extract > the value of the referenced variable and print that. The example module > “print” does not involve this concept of pseudo-variables. The skeleton > module example in the wiki also does not mention variables. > > I’ve looked into other modules to see how it works but they all seem to have > a slightly different handling of this task. Can someone point me to an > example in the modules which accomplishes this? > > What I’ve been searching for is a replace_all function which accepts a string > containing pseudo-variables and returns a new string with them all replaced > with their corresponding values. > > Thanks in advance and apologies if I’ve overlooked a relevant piece of > developer documentation or if I’m looking at this incorrectly. > > Regards, > -Michael > > > _______________________________________________ > Kamailio (SER) - Users Mailing List > [email protected] > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Kamailio (SER) - Users Mailing List [email protected] https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
