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#### Type Of Change - [ ] Small bug fix (non-breaking change which fixes an issue) - [ ] New feature (non-breaking change which adds new functionality) - [x ] Breaking change (fix or feature that would change existing functionality)
#### Checklist: <!-- Go over all points below, and after creating the PR, tick the checkboxes that apply --> - [ ] PR should be backported to stable branches - [x ] Tested changes locally -- tested at 5.1.6 - [ ] Related to issue #XXXX (replace XXXX with an open issue number)
#### Description <!-- Describe your changes in detail --> Problem: Forwarding of 200 OK while sent 488 waits for ACK, destroys the UAS send buffer Scenario: During suspension of 200 OK by ims_qos module function Rx_AAR() at terminating PCSCF, The PCRF sends an AA Answer with result code DIAMETER_TOO_BUSY (3004), which triggers the PCSCF to send a 488 ‘Sorry no QoS available’ to the originating side (ims_dialog module function dlg_terminate()). Afterwards neither the 200 OK nor the ACK(488) is processed correctly by the PCSCF. Solution: The UAS send buffer should not be overwritten during processing of 200 OK, because non-2xx is needed to associate the ACK message in a correct way. 200 OK must be forwarded statelessly. Side-Effect (potentially breaks existing function): Some callbacks cannot be called for the 200 OK, to avoid messing the stored 488.
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/2590
-- Commit Summary --
* tm: 200 OK not processed correctly by Proxy after final non-2xx
-- File Changes --
M src/modules/tm/t_reply.c (72)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/2590.patch https://github.com/kamailio/kamailio/pull/2590.diff