Hello, following the recent new feature of #!ifexp based on snexpr (https://www.kamailio.org/w/2022/09/ifexp-conditional-preprocessor-blocks/), another preprocessor directive was added which allows defining IDs with a value computed from the evaluation of an expression, respectively: #!defexp ID EXP The EXP can be any expression supported by snexpr, including the previously defined IDs. For example: #!define IPADDR 1.2.3.4 #!define PORT 5060 #!defexp SIPURI "sip:" + IPADDR + ":" + PORT The result is that SIPURI is defined to sip:1.2.3.4:5060. Another variant is available as #!defexps, which encloses the result of the expression in double quotes, making it suitable to be used further as string value: #!defexps SIPURI "sip:" + IPADDR + ":" + PORT The result is that SIPURI is defined to “sip:1.2.3.4:5060”. More details at:   - https://www.kamailio.org/wikidocs/cookbooks/devel/core/#defexp   - https://www.kamailio.org/wikidocs/cookbooks/devel/core/#defexps Testing would be appreciated, feedback can be addressed to sr-users mailing list! Cheers, Daniel -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda Kamailio Advanced Training - Online Nov 7-10, 2022 (Europe Timezone) * https://www.asipto.com/sw/kamailio-advanced-training-online/