making Kamailio communicates with PCF for VoNR a very basic work.

[NUCLEAR-WAR]

Hi,

I am trying to make Kamailio sends request to PCF, I tried to search for the way that the team in the Demo, but sadly they still did not share there code to my Knowledge, so I decided to try some stuff on my own, hope that maybe someone could improve it or make it better.
So I enabled the following modules in Kamailio P-CSCF :
HTTP_Client
JANSSON
HTTP_ASYNC_CLIENT
NGHTTP2 ( this maybe required to make P-CSCF able to process Requests from PCF if any)
those modules required system libraries that must be installed to make them work.

HTTP_Client uses curl to do HTTP2 request, which is crucial to able to communicate to PCF, untill now i used only HTTP_Client and JANSSON.

I added my script to the Register.cfg file right after adding PANI Header, not a perfect place, it just easy for me to make it run without me doing extra routing scripts.

The script serves only as very basic start, it need to be adopted based on the request/response type and sure the currect place in the P-CSCF scripts, it also need to have a Fail condition, so in case there is a negative response the call/request fails, but at least I was able to send request to the PCF and get response ( error code ;) ).

So here is what I did :

in Kamailio_pcscf.cfg :

must be loaded after some modules ( see man for every module)

loadmodule "http_async_client"
loadmodule "http_client"
loadmodule "jansson"
loadmodule "nghttp2"

modparam("http_client", "httpredirect", 1)
modparam("http_client", "useragent", "P-CSCF")
modparam("http_client", "maxdatasize", 64535)
modparam("http_client", "connection_timeout", 2)
modparam("http_client", "keep_connections", 1)
modparam("http_client", "response_headers", 1)

now in register.cfg ( important : there might be a way better place, so dont just copy paste, but improve and share, sharing is caring ):

directly after :
append_hf("P-Visited-Network-ID: NETWORKNAME\r\n");

xlog("L_ALERT","DEBUG: Preparing N5 Message to PCF for $fu\n");
xlog("L_ALERT","DEBUG: Initialize empty arrays and objects\n");
$var(events) = '[]';
$var(medComponents) = '{}';
$var(medSubComps) = '{}';
$var(evSubsc) = '{}';
$var(payload) = '{}';

xlog("L_ALERT","DEBUG: Set afAppId and dnn\n");

jansson_set("string", "afAppId", "IMS Registration", "$var(payload)");
jansson_set("string", "dnn", "ims", "$var(payload)");

xlog("L_ALERT","DEBUG: Set medComponents\n");
jansson_set("integer", "medCompN", 0, "$var(medComp)");
jansson_set("integer", "fNum", 0, "$var(medSubComp)");
jansson_set("string", "flowUsage", "AF_SIGNALLING", "$var(medSubComp)");
jansson_set("obj", "0", "$var(medSubComp)", "$var(medSubComps)");
jansson_set("obj", "medSubComps", "$var(medSubComps)", "$var(medComp)");
jansson_set("obj", "0", "$var(medComp)", "$var(medComponents)");
jansson_set("obj", "medComponents", "$var(medComponents)", "$var(payload)");

xlog("L_ALERT","DEBUG: Set evSubsc\n");
jansson_set("string", "event", "CHARGING_CORRELATION", "$var(event)");
jansson_append("obj", "", "$var(event)", "$var(events)");
jansson_set("array", "events", "$var(events)", "$var(evSubsc)");
jansson_set("string", "notifUri", "http://172.22.0.21:7777/n5/v1/events/pcscf-1.ims.mnc001.mcc001.3gppnetwork.org;3134282159;1", "$var(evSubsc)");
jansson_set("obj", "evSubsc", "$var(evSubsc)", "$var(payload)");

xlog("L_ALERT","DEBUG: Set other parameters in payload\n");
jansson_set("string", "notifUri", "http://172.22.0.21:7777/n5/v1/events/pcscf-1.ims.mnc001.mcc001.3gppnetwork.org;3134282159;1", "$var(payload)");
jansson_set("string", "sponStatus", "SPONSOR_DISABLED", "$var(payload)");
jansson_set("string", "supi", "imsi-001010000036041", "$var(payload)");
jansson_set("string", "suppFeat", "2", "$var(payload)");
jansson_set("string", "ueIpv4", "$si", "$var(payload)");

xlog("L_ALERT","DEBUG: Assemble the final JSON request\n");
jansson_set("obj", "ascReqData", "$var(payload)", "$var(json_request)");

xlog("L_ALERT","DEBUG: Set headers for the HTTP2 Request\n");    
$var(time_now)=$_s($timef(%a, %d %b %Y %H:%M:%S %Z));
xlog("Today is $var(time_now)\n");
 
$var(headers) = "Content-Type: application/json\r\n";
$var(headers) = $var(headers) + "3gpp-sbi-discovery-target-nf-type: NRF\r\n";
$var(headers) = $var(headers) + "accept: application/json\r\n";
$var(headers) = $var(headers) + "accept: application/problem+json\r\n";
$var(headers) = $var(headers) + "3gpp-sbi-max-rsp-time: 10000\r\n";
$var(headers) = $var(headers) + "3gpp-sbi-discovery-service-names: npcf-policyauthorization\r\n";
$var(headers) = $var(headers) + "3gpp-sbi-sender-timestamp: " + $var(time_now);

xlog("L_ALERT","DEBUG: Sending the request to PCF\n");    
http_client_request_v2pk("POST", "http://172.22.0.27:7777/npcf-policyauthorization/v1/app-sessions", "$var(json_request)", "$var(headers)", "$var(result)" );
xlog("HTTP response: $var(result)\n");

JSON output will be like this :

{
   "ascReqData":{
      "afAppId":"IMS Registration",
      "dnn":"ims",
      "medComponents":{
         "0":{
            "medCompN":0,
            "medSubComps":{
               "0":{
                  "fNum":0,
                  "flowUsage":"AF_SIGNALLING"
               }
            }
         }
      },
      "evSubsc":{
         "events":[
            {
               "event":"CHARGING_CORRELATION"
            }
         ],
         "notifUri":"http://172.22.0.21:7777/n5/v1/events/pcscf-1.ims.mnc001.mcc001.3gppnetwork.org;3134282159;1"
      },
      "notifUri":"http://172.22.0.21:7777/n5/v1/events/pcscf-1.ims.mnc001.mcc001.3gppnetwork.org;3134282159;1",
      "sponStatus":"SPONSOR_DISABLED",
      "supi":"imsi-001010000036041",
      "suppFeat":"2",
      "ueIpv4":"192.168.105.18"
   }
}

here is a Trace also:
vonr_n5_pcscf-pcf_t1.zip

the code is not at all good, but it could serve as a basis for more better N5 requests

this code is attached to Register request ( not suitable here) and serves to test only the communication, I got this error from PCF :

`
07/07 14:10:54.801: [app] INFO: PCF initialize...done (../src/pcf/app.c:31)
07/07 14:10:54.809: [sbi] INFO: [f5f433b0-3c59-41ef-b823-3b64fcfc4bc6] NF registered [Heartbeat:10s] (../lib/sbi/nf-sm.c:221)
07/07 14:10:54.814: [sbi] INFO: [f5f6c648-3c59-41ef-96c7-27bbc9b87b57] Subscription created until 2024-07-08T14:10:54.812170+02:00 [duration:86400,validity:86399.997774,patch:43199.998887] (../lib/sbi/nnrf-handler.c:813)
07/07 14:10:54.815: [sbi] INFO: [f5f6edf8-3c59-41ef-96c7-27bbc9b87b57] Subscription created until 2024-07-08T14:10:54.813178+02:00 [duration:86400,validity:86399.998092,patch:43199.999046] (../lib/sbi/nnrf-handler.c:813)
07/07 14:10:54.816: [sbi] INFO: [f5f70a72-3c59-41ef-96c7-27bbc9b87b57] Subscription created until 2024-07-08T14:10:54.813905+02:00 [duration:86400,validity:86399.997389,patch:43199.998694] (../lib/sbi/nnrf-handler.c:813)
07/07 14:17:13.333: [pcf] ERROR: Not found [/npcf-smpolicycontrol/v1/sm-policies/22/delete] (../src/pcf/pcf-sm.c:208)
07/07 14:17:13.371: [sbi] INFO: [UDR] (SCP-discover) NF registered [113b9136-3c50-41ef-87f6-c1c202ca8e49:1] (../lib/sbi/path.c:211)
07/07 14:17:13.377: [sbi] INFO: [BSF] (SCP-discover) NF registered [11f03032-3c50-41ef-b269-413b115b44e5:1] (../lib/sbi/path.c:211)
07/07 14:17:13.801: [pcf] ERROR: [imsi-001010000084719:1] Media-Type is Required (../src/pcf/npcf-handler.c:1087)
07/07 14:17:13.948: [pcf] ERROR: Not found [/npcf-smpolicycontrol/v1/sm-policies/20/delete] (../src/pcf/pcf-sm.c:208)
07/07 14:17:13.983: [sbi] WARNING: [UDR] (SCP-discover) NF has already been added [113b9136-3c50-41ef-87f6-c1c202ca8e49:2] (../lib/sbi/path.c:216)
07/07 14:17:13.988: [sbi] WARNING: [BSF] (SCP-discover) NF has already been added [11f03032-3c50-41ef-b269-413b115b44e5:2] (../lib/sbi/path.c:216)
07/07 14:20:14.478: [pcf] ERROR: SmContextStatusNotification failed [500] (../src/pcf/sbi-path.c:251)
07/07 14:20:24.880: [sbi] WARNING: [UDR] (SCP-discover) NF has already been added [113b9136-3c50-41ef-87f6-c1c202ca8e49:1] (../lib/sbi/path.c:216)
07/07 14:20:24.882: [sbi] WARNING: [UDR] (SCP-discover) NF has already been added [113b9136-3c50-41ef-87f6-c1c202ca8e49:2] (../lib/sbi/path.c:216)
07/07 14:20:24.889: [sbi] WARNING: [BSF] (SCP-discover) NF has already been added [11f03032-3c50-41ef-b269-413b115b44e5:1] (../lib/sbi/path.c:216)
07/07 14:20:24.893: [sbi] WARNING: [BSF] (SCP-discover) NF has already been added [11f03032-3c50-41ef-b269-413b115b44e5:2] (../lib/sbi/path.c:216)
07/07 14:20:25.460: [pcf] ERROR: [imsi-001010000084719:1] Media-Type is Required (../src/pcf/npcf-handler.c:1087)
07/07 14:20:25.921: [pcf] ERROR: [imsi-001010000084719:1] Media-Type is Required (../src/pcf/npcf-handler.c:1087)

`

I hope someone could make use of that.

Best Regards

[herlesupreeth]

@NUCLEAR-WAR awesome work sharing it here. Its already a great start. I could probably take it from here. Thanks a lot

[NUCLEAR-WAR]

glad that I could help! I saw a lot of people have some working setups but sadly not sharing the configs, which is not a good opensource spirit, so I planned to do something ;)

I don't have currently access to any traces for VoNR, I read the standards, but seeing it working would give more Idea on what to send, starting from Registration to Call and then de-Registration.
JANSSON and HTTP_CLIENT both give lot of options to generate Requests over N5 Interface, the responses can also be stored in variables to used them later or store them maybe in DB.

Anyway if you got something to test just drop it here and I will glad to test it.

Best Regards

[sathyag85]

@herlesupreeth One query.. whether the above modules are already included in existing docker_open5gs or need to be included and compile.
loadmodule "http_async_client"
loadmodule "http_client"
loadmodule "jansson"
loadmodule "nghttp2"

I see that the modules mentioned above are in the excluded list.

the list of modules to exclude from compile list
exclude_modules= malloc_test app_sqlang acc_json acc_radius app_java app_lua app_lua_sr app_mono app_perl app_python app_python3 app_python3s app_ruby app_ruby_proc auth_ephemeral auth_identity auth_radius cnxcc cplc crypto db2_ldap db_berkeley db_cassandra db_mongodb db_oracle db_perlvdb db_postgres db_redis db_sqlite db_unixodbc dnssec erlang evapi geoip geoip2 gzcompress h350 http_async_client http_client jansson janssonrpcc json jsonrpcc jwt kafka kazoo lcr ldap log_systemd lost lwsc memcached microhttpd misc_radius mqtt nats ndb_cassandra ndb_mongodb ndb_redis nghttp2 nsq osp peering phonenum rabbitmq regex rls rtp_media_server ruxc secsipid secsipid_proc slack snmpstats stirshaken systemdops tls_wolfssl tlsa topos_redis uuid websocket xhttp_pi xmpp $(skip_modules)

[herlesupreeth]

One query.. whether the above modules are already included in existing docker_open5gs or need to be included and compile.

Need to be included and its corresponding dependencies needs to be installed as well

[sathyag85]

Thank you for your reply.

[NUCLEAR-WAR]

I compiled Kamailio 5.8 on other machine and copied the compiled modules to the P-CSCF Container, then I connected to the container and installed the dependencies, if you want to do the same just be sue to compile under Ubuntu:focal to avoid any trouble with Glibc issues.

[sathyag85]

Ok @NUCLEAR-WAR..let me check

[NUCLEAR-WAR]

Hi,

Trying to get NGHTTP2 Module up and running, this module is a complet mess, the documentation does not mention required parameters to run it, also the variable $nghttp2(url) is wrong, no such parameter is "url", with this variable it is instead "path" or "pathfull", only if someone looks in the source code will find that, to run it the following is required :

modparam("nghttp2", "listen_addr", "P-CSCF_IP")
modparam("nghttp2", "listen_port", "PORT")
modparam("nghttp2", "tls_private_key", "key_in_PEM_Format")
modparam("nghttp2", "tls_public_key", "certificate_in_PEM_Format")

then the routing script is required also, otherwise the module will not run:

event_route[nghttp2:request] {
    xinfo("request: $nghttp2(method) - url: $nghttp2(path) - data: [$nghttp2(data)]\n");
    
    // Check if the requested URL is /terminate
    if ($nghttp2(path) == "/terminate") {
        nghttp2_reply_header("Content-Type", "text/html");
        nghttp2_reply_header("Server:", "P-CSCF");
        nghttp2_reply("200", "<html><body>Termination complete</body></html>");
    } else {
        // Optionally handle other URLs or do nothing
        nghttp2_reply("404", "<html><body>Not Found</body></html>");
    }
}

also the module is not stable tried to connect to it with curl it crashed the P-CSCF with this error ( the same if SCP tries to connect):

92(132) DEBUG: nghttp2 [nghttp2_server.c:717]: eventcb(): 172.22.0.1 connected
92(132) DEBUG: nghttp2 [nghttp2_server.c:507]: on_request_recv(): 172.22.0.1 GET /
92(132) DEBUG: nghttp2 [nghttp2_mod.c:522]: ksr_event_route(): executing event_route[nghttp2:request] (1)
free(): invalid pointer
102(142) CRITICAL: <core> [core/pass_fd.c:281]: receive_fd(): EOF on 7
102(142) DEBUG: <core> [core/tcp_main.c:3984]: handle_ser_child(): dead child 92, pid 132 (shutting down?)
102(142) DEBUG: <core> [core/io_wait.h:599]: io_watch_del(): DBG: io_watch_del (0x5b85ddc10ae0, 7, -1, 0x0) fd_no=130 called
 0(40) ALERT: <core> [main.c:806]: handle_sigs(): child process 132 exited by a signal 6
 0(40) ALERT: <core> [main.c:810]: handle_sigs(): core was generated

also it run only in TLS, someone need to write it the same as Open5GS is using nghttp2 but without TLS and stable.
I will try to test with a running nghttp2 instance in the P-CSCF container just to see the result, here is the new JSON Payload that got a 201 from PCF :
still in need of a 5G NR Trace for Reg and Call to able to write the correct JSON Payload, ( most of Operator here still using Rx)

##### 5G Experemntal PCF N5 Interface   
   
    xlog("L_ALERT","DEBUG: Preparing N5 Message to PCF for $fu\n");
    
    xlog("L_ALERT","DEBUG: Initialize empty arrays and objects\n");
### Initialize empty arrays and objects
    $var(events) = '[]';
    $var(medComponents) = '{}';
    $var(medSubComps) = '{}';e
    $var(evSubsc) = '{}';
    $var(payload) = '{}';

    xlog("L_ALERT","DEBUG: Set afAppId and dnn\n");
    
### Set afAppId and dnn in payload
    jansson_set("string", "afAppId", "IMS Registration", "$var(payload)");
    jansson_set("string", "dnn", "ims", "$var(payload)");

    xlog("L_ALERT","DEBUG: Set medComponents\n");
### Set medComponents
    jansson_set("integer", "medCompN", 0, "$var(medComp)");
    jansson_set("string", "qosReference", "qosVoNR", "$var(medComp)");
    jansson_set("string", "medType", "AUDIO", "$var(medComp)");
    jansson_set("integer", "fNum", 0, "$var(medSubComp)");
    jansson_set("string", "flowUsage", "AF_SIGNALLING", "$var(medSubComp)");
    jansson_set("obj", "0", "$var(medSubComp)", "$var(medSubComps)");
    jansson_set("obj", "medSubComps", "$var(medSubComps)", "$var(medComp)");
    jansson_set("obj", "0", "$var(medComp)", "$var(medComponents)");
    jansson_set("obj", "medComponents", "$var(medComponents)", "$var(payload)");

    xlog("L_ALERT","DEBUG: Set evSubsc\n");
### Set evSubsc
    jansson_set("string", "event", "QOS_NOTIF", "$var(event)");
    jansson_append("obj", "", "$var(event)", "$var(events)");
    jansson_set("array", "events", "$var(events)", "$var(evSubsc)");
    jansson_set("string", "notifUri", "https://pcscf.ims.mnc001.mcc001.3gppnetwork.org:8284", "$var(evSubsc)");
    jansson_set("obj", "evSubsc", "$var(evSubsc)", "$var(payload)");

    xlog("L_ALERT","DEBUG: Set other parameters in payload\n");
### Set other parameters in payload
    jansson_set("string", "notifUri", "https://pcscf.ims.mnc001.mcc001.3gppnetwork.org:8284", "$var(payload)");
    jansson_set("string", "sponStatus", "SPONSOR_DISABLED", "$var(payload)");
    jansson_set("string", "supi", "imsi-$au", "$var(payload)");
    jansson_set("string", "suppFeat", "2", "$var(payload)");
    jansson_set("string", "ueIpv4", "$si", "$var(payload)");

    xlog("L_ALERT","DEBUG: Assemble the final JSON request\n");
### Assemble the final JSON request
    jansson_set("obj", "ascReqData", "$var(payload)", "$var(json_request)");

    xlog("L_ALERT","DEBUG: Set headers for the HTTP2 Request\n");    
### Set headers    
    $var(time_now)=$_s($timef(%a, %d %b %Y %H:%M:%S %Z));
    xlog("Today is $var(time_now)\n");
     
    $var(headers) = "Content-Type: application/json\r\n";
    $var(headers) = $var(headers) + "accept: application/json\r\n";
    $var(headers) = $var(headers) + "accept: application/problem+json\r\n";
    $var(headers) = $var(headers) + "3gpp-sbi-max-rsp-time: 10000\r\n";
    $var(headers) = $var(headers) + "3gpp-sbi-discovery-service-names: npcf-policyauthorization_create\r\n";
    $var(headers) = $var(headers) + "3gpp-sbi-sender-timestamp: " + $var(time_now);
    
    xlog("L_ALERT","DEBUG: Sending the request to PCF\n");    
### Send the request to PCF  
    http_client_request_v2pk("POST", "http://172.22.0.27:7777/npcf-policyauthorization/v1/app-sessions", "$var(json_request)", "$var(headers)", "$var(result)" );
    xlog("HTTP response: $var(result)\n");

Trace as always is attached Frame# 1045 for PCSCF-PCF:

vonr_n5_pcscf-pcf_t5_f2.zip

not sure how to solve the NGhttp2 module issue ;(

Best Regards

[herlesupreeth]

@NUCLEAR-WAR regarding the below, could you raise the issue in kamailio repo. The developer there (Daniel) is quite helpful.

Trying to get NGHTTP2 Module up and running, this module is a complet mess, the documentation does not mention required parameters to run it, also the variable $nghttp2(url) is wrong, no such parameter is "url", with this variable it is instead "path" or "pathfull", only if someone looks in the source code will find that, to run it the following is required :

[herlesupreeth]

Ah I see that you have already raised it.. thanks :)

[NUCLEAR-WAR]

Its looks like a part in the code of nghttp2 added with a commit causes this issue, I removed the added part, it is stable until now

[NUCLEAR-WAR]

Hi @herlesupreeth

can you check this trace if now doing QoS with N5 ? I'm creating AppSession then modified it later with Sub/Invite, used some logic to store the AppSession and then use it later in the routing.

I hope there is some improvement here, still dont have any commercial traces ;(

vonr_n5_pcscf-pcf_t6_f2_Reg_Inv.zip

in case you are interested in the logs :
core_logs.zip

take a look and let me know if there is any improvement.

Best Regards

[herlesupreeth]

As far as I know session modification is not yet supported in SRS gNB. Maybe better to post there

[herlesupreeth]

Btw, I plan to merge all your PRs and start modifying it. Is it okay for you? Or do you want me to review so that you can be the author of the commit?

[NUCLEAR-WAR]

thanks for the info, spent the whole night fighting this issue thought there is an issue with the payload, I will open an issue at srsRAN and see what I can get.

I added the last commit now, you can review it and I can be the author, it does not matter at the end ;)

[NUCLEAR-WAR]

do you know if OAI support session modification, or any opensource gNodeB ?

[NUCLEAR-WAR]

forget about OAI they dont support it and there repo is somehow very restricted, I will stick with srsRAN_Project

[NUCLEAR-WAR]

Many thanks for the reviews!

Here is a new trace between the PCF and the P-CSCF with the new changes based on your reviews

VoNR_N5_mo_cfg_inv_reinv_reg_dereg.zip

I still need to do the same for the mt.conf file should be not hard, but I need to find a way to test it because I dont have another 5G Device

[herlesupreeth]

Thanks for your contribution. I merged all your PRs.

[herlesupreeth]

btw, are you on discord or any such channels where it would be easier to message if I have any doubts?

[NUCLEAR-WAR]

you can reach me on discord with "nuclear.war" also you can reach me on LinkedIn.

many thanks again for the reviews and the merge, regarding the mt.cfg I will try to finnish it this week, so we would have full N5 Support for MOC and MTC

[sathyag85]

@NUCLEAR-WAR @herlesupreeth Is it possible to have a VONR call with the new docker image and this dedicated bearer allocation for call be implemented in the recent image?

[sathyag85]

@NUCLEAR-WAR I don't know how to take system logs in RAN. I am checking. Now I have rebooted the RAN once since it is acting improperly and tested it again. seems like the A side is accepting modification requests.
docker3_pcap.zip

[sathyag85]

@NUCLEAR-WAR ps find the trace captured from RAN
Mon_6EB9_6.zip

[NUCLEAR-WAR]

@sathyag85 is there any diagnostic logs in the Nokia Webgui ? they would be helpful.

On the other side still dont understand why it worked in #10789240 on A Side and its now not working at all.
Also I see on the B Side that the device is getting two INVITEs on two deferent IPs, the P-CSCF is getting a 404 on N5 Request for the first one the second one was OK, but why there is two INVITEs in the first place ?

I am still leaning on the xperties from @herlesupreeth , In the mean time lets start from the beginning, can you download the original mt.cfg and mo.cfg from the repository again ( use the same branch for N5 -exp_5g_ims_pyhss- ), after that do the modification to mo.cfg :

uncomment the following lines :
mo.cfg lines : 600,601,609,610

jansson_set("array", "fDescs", "[\"permit out 17 from any 49000-50000 to $var(ue_sdp_ip) $var(ue_sdp_port)\", \"permit in 17 from $var(ue_sdp_ip) $var(ue_sdp_port) to any 49000-50000\"]", "$var(medSubComp1)");

and also line 233 for RTCP:

jansson_set("array", "fDescs", "[\"permit out 17 from any 49000-50000 to $var(ue_sdp_ip) $var(ue_sdp_rtcp_port)\", \"permit in 17 from $var(ue_sdp_ip) $var(ue_sdp_rtcp_port) to any 49000-50000\"]", "$var(medSubComp2)");

[herlesupreeth]

Sorry, I had been away since was sick. I had a look at the trace posted earlier as @NUCLEAR-WAR mentioned, A side is not working at all. On the other hand the trace on the RAN is not much informative but I see right away gNB is failing to establish the default bearer for 'internet' and 'ims' DNN

asnWin.document.write('<h2> InitialContextSetupFailure</h2> <br>\
NGAP-PDU : unsuccessfulOutcome : {<br>\
  procedureCode 14,<br>\
  criticality reject,<br>\
  value InitialContextSetupFailure : {<br>\
    protocolIEs {<br>\
     {<br>\
      id 10,<br>\
      criticality ignore,<br>\
      value AMF-UE-NGAP-ID : 264<br>\
     },<br>\
     {<br>\
      id 85,<br>\
      criticality ignore,<br>\
      value RAN-UE-NGAP-ID : 92794<br>\
     },<br>\
     {<br>\
      id 132,<br>\
      criticality ignore,<br>\
      value PDUSessionResourceFailedToSetupListCxtFail : {<br>\
        {<br>\
         pDUSessionID 1,<br>\
         pDUSessionResourceSetupUnsuccessfulTransfer {<br>\
          cause radioNetwork : invalid-qos-combination<br>\
         }<br>\
        },<br>\
        {<br>\
         pDUSessionID 2,<br>\
         pDUSessionResourceSetupUnsuccessfulTransfer {<br>\
          cause radioNetwork : invalid-qos-combination<br>\
         }<br>\
        }<br>\
       }<br>\
     },<br>\
     {<br>\
      id 15,<br>\
      criticality ignore,<br>\
      value Cause : radioNetwork : invalid-qos-combination<br>\
     }<br>\
    }<br>\
   }<br>\
 }');

@sathyag85 are you sure when you captured above trace the two UEs were registered with IMS and you were attempting to call?

[sathyag85]

@herlesupreeth Yes, the trace was captured on RAN while I was making a call, and a dedicated bearer allocation was happening over time.

[JayaramRCDAC]

What's the module name for nghttp2?
The Kamailio build is failing when I give it as nghttp2.

modules.lst:
include_modules= cdp cdp_avp db_mysql dialplan ims_auth ims_charging ims_dialog ims_diameter_server ims_icscf ims_ipsec_pcscf ims_isc ims_ocs ims_qos ims_registrar_pcscf ims_registrar_scscf ims_usrloc_pcscf ims_usrloc_scscf outbound presence presence_conference presence_dialoginfo presence_mwi presence_profile presence_reginfo presence_xml pua pua_bla pua_dialoginfo pua_reginfo pua_rpc pua_usrloc pua_xmpp sctp tls utils xcap_client xcap_server xmlops xmlrpc http_async_client http_client jansson nghttp2

Build output:
md5.o core/crypto/md5utils.o core/crypto/rijndael.o core/crypto/sha256.o core/crypto/shautils.o core/cfg/cfg.o core/cfg/cfg_ctx.o core/cfg/cfg_script.o core/cfg/cfg_select.o core/cfg/cfg_struct.o core/utils/srjson.o core/utils/sruid.o core/utils/tmrec.o core/lex.yy.o core/cfg.tab.o -ldl -lresolv -lm -o kamailio module not found: modules/nghttp2 make[1]: Leaving directory '/usr/local/src/kamailio-5.8/kamailio/src' make[1]: *** [Makefile:508: modules] Error 1 make: *** [Makefile:34: all] Error 2

[JayaramRCDAC]

I'm following this guide to install Kamailio v5.8.3.
So I'm using 5.8 branch.
Also I'm getting error for json module.

json_funcs.c:26:10: fatal error: json.h: No such file or directory 26 | #include <json.h> | ^~~~~~~~ compilation terminated.

[NUCLEAR-WAR]

the 5.8 branch does not contain the nghttp2 module, only the master does, also master contains a fixed version of it, so I would recommend to compile it from that branch, I think it would work with 5.8 if you copy the .so file.

for the Error your are getting, it is probably because the Jansson header library is not installed, for Ubuntu you may try to install libjson-c-dev and libjansson-dev.
For nghttp2 you need also to install the required header library, on Ubuntu its libnghttp2-dev.

[JayaramRCDAC]

I switched to master branch. But I'm getting some errors in nghttp2 module.

0(53251) ERROR: ims_ipsec_pcscf [ipsec.c:652]: clean_sa(): Error sending delete SAs command via netlink socket: No data available
0(53251) WARNING: ims_ipsec_pcscf [cmd.c:1386]: ipsec_cleanall(): Error cleaning IPSec Security associations during startup.
0(53251) ERROR: ims_ipsec_pcscf [ipsec.c:701]: clean_policy(): Error sending delete policies command via netlink socket: No data available
0(53251) WARNING: ims_ipsec_pcscf [cmd.c:1390]: ipsec_cleanall(): Error cleaning IPSec Policies during startup.
0(53251) INFO: ims_registrar_pcscf [ims_registrar_pcscf_mod.c:315]: mod_init(): Successfully bound to PCSCF IPSEC module
0(53251) INFO: http_async_client [http_async_client_mod.c:240]: mod_init(): Initializing Http Async module
0(53251) INFO: http_client [http_client.c:362]: mod_init(): HTTP proxy port set to 0. Disabling HTTP proxy
0(53251) ERROR: nghttp2 [nghttp2_mod.c:122]: mod_init(): failed to find event_route[nghttp2:request]
0(53251) ERROR: [core/sr_module.c:1036]: init_mod(): Error while initializing module nghttp2 (/usr/local/lib64/kamailio/modules/nghttp2.so)
ERROR: error while initializing modules
0(53251) INFO: cdp [cdp_mod.c:287]: cdp_exit(): CDiameterPeer child stopping ...
0(53251) INFO: cdp [diameter_peer.c:386]: diameter_peer_destroy(): destroy_diameter_peer(): Terminating all children...
0(53251) INFO: cdp [diameter_peer.c:406]: diameter_peer_destroy(): destroy_diameter_peer(): All processes terminated. Cleaning up.
0(53251) INFO: cdp [worker.c:147]: worker_destroy(): Unlocking workers waiting on empty queue...
0(53251) INFO: cdp [worker.c:150]: worker_destroy(): Unlocking workers waiting on full queue...
0(53251) CRITICAL: cdp [diameter_peer.c:447]: diameter_peer_destroy(): destroy_diameter_peer(): Bye Bye from C Diameter Peer test
0(53251) INFO: cdp [cdp_mod.c:289]: cdp_exit(): ... CDiameterPeer child stopped
0(53251) ERROR: ims_ipsec_pcscf [ipsec.c:652]: clean_sa(): Error sending delete SAs command via netlink socket: No data available
0(53251) WARNING: ims_ipsec_pcscf [cmd.c:1386]: ipsec_cleanall(): Error cleaning IPSec Security associations during startup.
0(53251) ERROR: ims_ipsec_pcscf [ipsec.c:701]: clean_policy(): Error sending delete policies command via netlink socket: No data available
0(53251) WARNING: ims_ipsec_pcscf [cmd.c:1390]: ipsec_cleanall(): Error cleaning IPSec Policies during startup.

[herlesupreeth]

Rather than master branch of kamailio, try to use the code from the commit id here -

docker_open5gs/ims_base/Dockerfile

Line 42 in ff550f8

cd kamailio && git checkout 0da3eb3f94c087b272ebbe19c42fd933146482f8

[NUCLEAR-WAR]

@herlesupreeth I think someone from kamailio need to merge the fix for the NGHTTP2 module to that branch, as after the second connect to the nghttp2 server, the P-CSCF will crash, the fix is only on the master branch ;(