[OpenSIPS-Devel] [OpenSIPS/opensips] f30166: registrar/mid-registrar: Add the "expires_max_devi...

[Liviu Chircu]

  Branch: refs/heads/master
  Home:   https://github.com/OpenSIPS/opensips
  Commit: f301667b37fee847bd7e232a1064acb2adf13c25
      https://github.com/OpenSIPS/opensips/commit/f301667b37fee847bd7e232a1064acb2adf13c25
  Author: Liviu Chircu <liviu at opensips.org>
  Date:   2022-03-25 (Fri, 25 Mar 2022)

  Changed paths:
    M lib/reg/ci.c
    M lib/reg/common.c
    M lib/reg/common.h
    M lib/reg/doc/reg_modparams.xml
    M modules/mid_registrar/save.c

  Log Message:
  -----------
  registrar/mid-registrar: Add the "expires_max_deviation" modparam

This new modparam could help mitigate the effects of post-restart
"registration storms", when all TCP connections go down and a
significant portion of devices re-REGISTER on the spot.

By randomizing the returned expiry intervals, the REGISTER storm will no
longer repeat at regular intervals following a restart, e.g. every 3600
seconds.