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You can delete next line and everything above before submitting (it is a comment). --> ### Description Consider the following setup: an edge proxy is configured with the path module, double rr is enabled (because the proxy is multihomed), add_path_received() is used to cope with NATted endpoints and the registrar is a separate kamailio instance residing on a private network. Contacts are saved successfully by the registrar, along with path information. INVITEs are first sent to the registrar which performs location lookup, and forwards the request based on the contact's Path. This part works as expected. However, things seem to fail when using the new keepalive functionality of the usrloc module on the registrar. The OPTIONS request is forwarded to the "received" parameter of the first Route header instead of the URI of the first Route header. <!-- Explain what you did, what you expected to happen, and what actually happened. --> ### Troubleshooting #### SIP Traffic <!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). --> EXAMPLES (check the first line printed by sngrep for L3/L4 info, public IPs have been censored): 1) INVITE is routed to $route_uri, ignoring the "received" parameter when doing a loose_route(): ``` 2020/08/18 19:58:29.918672 172.30.154.189:5060 -> 172.28.155.1:5060 INVITE sip:voip-test-user-04@2.2.2.2:5060 SIP/2.0 Via: SIP/2.0/UDP 172.30.154.189;branch=z9hG4bKa788.302fa172e9b1851973593c7f20d3586d.0 Route: <sip:172.28.155.1;lr;received=sip:2.2.2.2:5060;r2=on>,<sip:3.3.3.3;lr;received=sip:2.2.2.2:5060;r2=on> Via: SIP/2.0/UDP 172.30.152.3:5060;branch=z9hG4bK104f503d Max-Forwards: 69 From: "sbcpub-stage-test-01" <sip:1234567890@sip.domain>;tag=as77e25748 To: <sip:voip-test-user-04@sip.domain> Contact: <sip:1234567890@172.30.152.3:5060> Call-ID: 53d1089c6bc695875816e25a49da8a29(a)sip.domain CSeq: 102 INVITE Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE Supported: replaces, timer X-CID: ac32e4ae-580e164d(a)172.17.173.14 Remote-Party-ID: "sbcpub-stage-test-01" <sip:1234567890@sip.domain>;party=calling;privacy=off;screen=no Content-Type: application/sdp Content-Length: 346 X-Called-Username: voip-test-user-04 v=0 o=root 18222507 18222507 IN IP4 172.30.152.3 c=IN IP4 172.30.152.3 t=0 0 m=audio 16106 RTP/AVP 9 8 0 18 101 a=rtpmap:9 G722/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=ptime:20 a=maxptime:150 a=sendrecv ``` 2) OPTIONS is routed to "received" value of first Route header when doing keepalives using the usrloc module: ``` 2020/08/18 19:58:02.450949 172.30.154.189:5060 -> 2.2.2.2:5064 OPTIONS sip:voip-test-user-05@172.17.173.36:5064 SIP/2.0 Via: SIP/2.0/UDP 172.30.154.189:5060;branch=z9hG4bKx.1.1.0 Route: <sip:172.30.155.1;lr;received=sip:2.2.2.2:5064;r2=on>,<sip:3.3.3.3:6050;lr;received=sip:2.2.2.2:5064;r2=on> From: <sip:conn-revival@sip.domain>;tag=uloc-5f3be864-5d75-2-8617a458-5f3c089a-6e141-1.1 To: <sip:voip-test-user-05@sip.domain> Call-ID: ksrulka-1.1 CSeq: 80 OPTIONS Content-Length: 0 ``` #### usrloc entries The location entries for the examples above are as follows: ``` AoR: voip-test-user-04 Contacts: { Contact: { Address: sip:voip-test-user-04@2.2.2.2:5060 Expires: 47 Q: -1.000000 Call-ID: 34b4a487df71412e8e93a7a1c358d723 CSeq: 54 User-Agent: PolycomVVX-VVX_250-UA/6.3.0.14929 Received: sip:2.2.2.2:5060 Path: <sip:172.28.155.1;lr;received=sip:2.2.2.2:5060;r2=on>,<sip:3.3.3.3;lr;received=sip:2.2.2.2:5060;r2=on> State: CS_DIRTY Flags: 0 CFlags: 128 Socket: udp:172.30.154.189:5060 Methods: 8159 Ruid: uloc-5f3bf3b8-65c3-b7 Instance: [not set] Reg-Id: 0 Server-Id: 0 Tcpconn-Id: -1 Keepalive: 0 Last-Keepalive: 1597771086 KA-Roundtrip: 0 Last-Modified: 1597771086 } } AoR: voip-test-user-05 Contacts: { Contact: { Address: sip:voip-test-user-05@172.17.173.36:5064 Expires: 88 Q: -1.000000 Call-ID: 3279de38-f6ae2c18(a)172.17.173.36 CSeq: 17174 User-Agent: Cisco/SPA525G2-7.6.2e Received: sip:2.2.2.2:5064 Path: <sip:172.30.155.1;lr;received=sip:2.2.2.2:5064;r2=on>,<sip:3.3.3.3:6050;lr;received=sip:2.2.2.2:5064;r2=on> State: CS_DIRTY Flags: 0 CFlags: 128 Socket: udp:172.30.154.189:5060 Methods: 6815 Ruid: uloc-5f3be864-5d75-2 Instance: [not set] Reg-Id: 0 Server-Id: 0 Tcpconn-Id: -1 Keepalive: 0 Last-Keepalive: 1597771100 KA-Roundtrip: 0 Last-Modified: 1597771100 } } ``` ### Possible Solutions There are two ways I can thing of to mitigate this: * Modify the path module so that the received parameter is only set for the first Path header, which corresponds to the interface the request was received on. I believe this is the preferred way to deal with this, as I don't see the point in adding ";received" to both path entries when performing double "r2" path injection. * Or, make usrloc keepalive behave the same way as loose_route(). It seems loose_route will only honour the ";received=" parameter in a Route header only if it's the last remaining one? I'm not sure this is how it works, but somehow I get the desired behaviour with loose_route() On a sidenote, usrloc locally generated OPTIONS do not seem to be handled by the local-request event route. Is this intentional? AFAICT it would require engaging the tm module which will add some overhead... <!-- If you found a solution or workaround for the issue, describe it. Ideally, provide a pull request with a fix. --> ### Additional Information * **Kamailio Version** - output of `kamailio -v` ``` version: kamailio 5.4.0 (x86_64/linux) ``` built with this patch: https://github.com/kamailio/kamailio/commit/19128f2121d8b859a6a546dfdf2c085… * **Operating System**: <!-- Details about the operating system, the type: Linux (e.g.,: Debian 8.4, Ubuntu 16.04, CentOS 7.1, ...), MacOS, xBSD, Solaris, ...; Kernel details (output of `uname -a`) --> ``` Linux sbcpub0-stage-lhe0-cn1 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1 (2020-01-26) x86_64 GNU/Linux ``` -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2447