--snip I would like to compute a time difference (with microseconds precision) when handling a stateless SIP request. --snip

Welcome! Take a look at: https://www.kamailio.org/wiki/cookbooks/5.4.x/pseudovariables#timeval You can get down to the microsecond level.

Hello, you could probably combine some string transformation to get the desired result. If your requirements are related to accounting, the acc module might bei easier to use. Cheers, Henning -- Henning Westerholt - https://skalatan.de/blog/ Kamailio services - https://skalatan.de/services ------------------------------------------------------------------------ *From:* sr-users <sr-users-bounces(a)lists.kamailio.org> on behalf of Chaigneau, Nicolas <nicolas.chaigneau(a)capgemini.com> *Sent:* Friday, September 25, 2020 6:34:30 PM *To:* Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> *Subject:* Re: [SR-Users] Computing a time difference when handling a stateless SIP request Thanks! Looking at src\modules\pv\pv_time.c, it seems TV functions just use "gettimeofday". I was looking for a time difference based on a monotonically increasing clock (to avoid possible NTP drifting imprecision). I've looked at the "benchmark" module which seems to do something like that, but I don't think I can use it for what I need... Anyhow, I have another question. Using the TV I've come up with the following. This works, except that I don't know how to convert an int to a string padded with zeroes (e.g. 51 => "051"). Is there a transformation that allows to do that?         $var(start_time) = $TV(Sn); # allows to cache $TV(s) and $TV(u)         (...)         $var(end_time) = $TV(Sn);         $var(end_s) = $TV(sn);         $var(end_us) = $TV(un);         $var(diff_us) = $var(end_us) - $TV(u) + (1000000 * ($var(end_s) - $TV(s)));         # convert this to ms (integer part) and us (fractional part)         $var(diff_ms) = $var(diff_us) / 1000;         $var(diff_us_f) = $var(diff_us) - (1000 * $var(diff_ms));         $var(diff_ms_us) = $var(diff_ms) + "." + $var(diff_us_f); # need to format on 3 digits... can we do the equivalent of sprintf("%03u") somehow ? This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message. _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Thanks! Looking at src\modules\pv\pv_time.c, it seems TV functions just use "gettimeofday". I was looking for a time difference based on a monotonically increasing clock (to avoid possible NTP drifting imprecision). I've looked at the "benchmark" module which seems to do something like that, but I don't think I can use it for what I need... Anyhow, I have another question. Using the TV I've come up with the following. This works, except that I don't know how to convert an int to a string padded with zeroes (e.g. 51 => "051"). Is there a transformation that allows to do that? $var(start_time) = $TV(Sn); # allows to cache $TV(s) and $TV(u) (...) $var(end_time) = $TV(Sn); $var(end_s) = $TV(sn); $var(end_us) = $TV(un); $var(diff_us) = $var(end_us) - $TV(u) + (1000000 * ($var(end_s) - $TV(s))); # convert this to ms (integer part) and us (fractional part) $var(diff_ms) = $var(diff_us) / 1000; $var(diff_us_f) = $var(diff_us) - (1000 * $var(diff_ms)); $var(diff_ms_us) = $var(diff_ms) + "." + $var(diff_us_f); # need to format on 3 digits... can we do the equivalent of sprintf("%03u") somehow ?