I remember from a past project that we also had some inter-op problems related to some specific AVPs in the Ro interface generated from Kamailio.
As it was a custom installation for a POC, we just removed the code supporting it.
It would be probably a good idea to add some logic to the module that allows to specify the AVPs that are included in the message. One way would be with a configuration switches, or with a mode parameter that supports an integer map value (probably more flexible way).
--
Henning Westerholt -
https://skalatan.de/blog/
Kamailio services -
https://gilawa.com
> -----Original Message-----
> From: s.ghahremannejad@gmail.com
s.ghahremannejad@gmail.com
> Sent: Dienstag, 5. September 2023 16:54
> To: sr-users@lists.kamailio.org
> Subject: [SR-Users] Unnecessary/Invalid AVPs in CCR message over Ro
> Interface
>
> **Issue Description**
>
> I'm encountering an issue with my Kamailio configuration related to the
> inclusion of the "Accounting-Record-Type" (480) and "Accounting-Record-
> Number" (485) AVPs in Credit-Control Request (CCR) messages sent from the
> S-CSCF to the OCS.
>
> **Issue Details**
>
> - **Problem**: The "Accounting-Record-Type" and "Accounting-Record-
> Number" AVPs are being added to CCR messages generated by my Kamailio
> instance.
> - **Expected Behavior**: According to modern Diameter and 3GPP standards
> (e.g., RFC 4006 and TS 32.299), these AVPs should not be included in CCR
> messages.
>
> **Configuration Details**
>
> - **Kamailio Version**: 5.3.0
> - **SigScale OCS Version**: 3.2.9
>
>
> Note that I have redacted some specific information for confidentiality
> reasons. The actual values are placed in my Kamailio main configuration file
> (`kamailio.cfg`) and Diameter-specific configuration files (where applicable).
>
> Kamailio.cfg:
> modparam("ims_charging", "db_url", DB_URL) modparam("ims_charging",
> "db_mode", 1) modparam("ims_charging", "origin_host", HOSTNAME);
> modparam("ims_charging", "origin_realm", NETWORKNAME);
> modparam("ims_charging", "destination_host", DESTINATION_HOST);
> modparam("ims_charging", "destination_realm", DESTINATION_REALM);
> modparam("ims_charging","service_context_id_root", RO_ROOT);
> modparam("ims_charging","service_context_id_ext", RO_EXT);
> modparam("ims_charging","service_context_id_mnc", MNC);
> modparam("ims_charging","service_context_id_mcc", MCC);
> modparam("ims_charging","interim_update_credits",30);
> modparam("ims_charging","timer_buffer",5);
>
> SCSCF.xml:
> <?xml version="1.0" encoding="UTF-8"?>
> <DiameterPeer
> FQDN="scscf.mncXXX.mccXXX.3gppnetwork.org"
> Realm="ims.mncXXX.mccXXX.3gppnetwork.org"
> Vendor_Id="10415"
> Product_Name="CDiameterPeer"
> AcceptUnknownPeers="1"
> DropUnknownOnDisconnect="1"
> Tc="30"
> Workers="16"
> QueueLength="32"
> TransactionTimeout="5"
> SessionsHashSize="128"
> DefaultAuthSessionTimeout="3600"
> MaxAuthSessionTimeout="3600"
> >
>
> <Peer FQDN="diameter" Realm="ims.mncXXX.mccXXX.3gppnetwork.org"
> port="3868"/>
> <Peer FQDN="192.168.2.31"
> Realm="ocs.ims.mncXXX.mccXXX.3gppnetwork.org" port="3868"/>
> <Acceptor port="3868" bind="eth0"/>
>
> <Auth id="16777216" vendor="10415"/><!-- 3GPP Cx -->
> <Auth id="16777216" vendor="4491"/><!-- CableLabs Cx -->
> <Auth id="16777216" vendor="13019"/><!-- ETSI/TISPAN Cx -->
> <Auth id="16777216" vendor="0"/><!-- ETSI/TISPAN Cx -->
>
> <Auth id="4" vendor="10415"/> <!--3GPP Ro -->
> <Acct id="4" vendor="10415" />
>
> <!--
> Supported Vendor IDs - list of values which will be sent in the CER/CEA in the
> Supported-Vendor-ID AVPs
> -->
> <SupportedVendor vendor="10415" />
> <Realm name="ocs.ims.mncXXX.mccXXX.3gppnetwork.org">
> <Route FQDN="192.168.2.31" metric="10"/>
> </Realm>
> <DefaultRoute FQDN="diameter" metric="10"/> </DiameterPeer>
>
> I am using SigScale OCS as my Online Charging System. Here is the error log I
> received from SigScale OCS:
> ERROR REPORT==== 5-Sep-2023::07:27:01.393554 === "DIAMETER AVP
> unsupported"
> service_name: {ocs_diameter_acct_service,{0,0,0,0},3868}
> capabilities: {diameter_caps,
> {<<"host1">>, <<"scscf-1.ims.mncXXX.mccXXX.3gppnetwork.org">>},
> {<<"COMPANYNAME.local">>,
> <<"ims.mncXXX.mccXXX.3gppnetwork.org">>},
> {[{0,0,0,0}],[{172,18,0,7}]},
> {50386,10415},
> {<<"SigScale OCS">>,<<"CDiameterPeer">>},
> {[],[]},
> {[10415],[10415]},
> {[4,16777238],[16777216]},
> {[],[]},
> {[],[]},
> {[{'diameter_base_Vendor-Specific-Application-
> Id',10415,[16777238],[]}],
> [{'diameter_base_Vendor-Specific-Application-
> Id',10415,[16777216],[]},
> {'diameter_base_Vendor-Specific-Application-
> Id',4491,[16777216],[]},
> {'diameter_base_Vendor-Specific-Application-
> Id',13019,[16777216],[]},
> {'diameter_base_Vendor-Specific-Application-Id',10415,[4],[]},
> {'diameter_base_Vendor-Specific-Application-Id',10415,[],[4]}]},
> {[329],[]},
> {[],[]}}
> errors: [{5001,
> {diameter_avp,480,undefined,true,false,
> <<0,0,0,2>>,
> 'Accounting-Record-Type',2,'Enumerated',5}},
> {5001,
> {diameter_avp,485,undefined,true,false,
> <<0,0,0,0>>,
> 'Accounting-Record-Number',0,'Unsigned32',6}},
> {5001,
> {diameter_avp,260,undefined,true,false,
> <<0,0,1,10,64,0,0,12,0,0,40,175,0,0,1,2,64,0,0,12,0,0,0,4>>,
> 'Vendor-Specific-Application-Id',
> {'3gpp_ro_Vendor-Specific-Application-Id',10415,[4],[]},
> 'Grouped',10}}]
>
>
>
> I would greatly appreciate it if someone from the community could provide
> insights into the following:
>
> 1. Possible Configurations: Are there specific configurations or modules in
> Kamailio that might cause the inclusion of non-standard AVPs in CCR
> messages?
>
> 2. IMS Ro Interface Behavior: Does anyone have experience with IMS Ro
> interface behavior using Kamailio that could shed light on this?
>
> If you have any guidance, suggestions, or solutions to help me troubleshoot
> and resolve this problem, please share them. Thank you for your assistance.
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