sr-users September 2021

sr-users@lists.kamailio.org

46 participants
61 discussions

Kamailio dispatcher -> FreeSWITCH transfers handling.
by Тимур Ситдиков 11 Sep '21

11 Sep '21

Hi list! :-) I'm a total newbie in Kamailio. Trying to study) Sorry for lots of text, I'm simply don't know how to explain my questions shorter :-D I want to configure Kamailio as dispatcher, registrar and NAT traversal in front of FS farm. I've managed to set up Kamailio and Fswitches. Now I need to handle "special cases" with confs, REFER transfers etc Giovanni Maruzzelli once presented solution for this, with following logic: ------------------------------------------------------------------------------------------------------- 1) Kamailio by default distribute calls to various FSs - dispatch or load_balance 2) Each time Kamailio sends a call to a FS, it writes down which destination "number" is going to which FS server and from which UserID 3) if another call comes for the same (or related) destination, or is originated from the same UserID then Kamailio sends the call to that same FS server, bypassing default distribution algorithm ------------------------------------------------------------------------------------------------------- Sounds good and helpful, but I'm stuck :-( *Can someone please share an example or point me how and in what form should I write down call info,and how can I control it (delete on BYE or CANCEL)?* Actually there are 2 questions It seems to me that recordings can be made using HTABLEs but here's a problem: ===================================================================================== ============================================================================================= 1) PROBLEM WITH WRITING TO HTABLE ON ATT TRANSFER After the dispatcher sets $du - I write an htable entry $sht(fsdest=>$fU:$rU) = $du; Existing entries are removed on catching 'BYE' for normal clearing, and with failure_route for all failures. BYE logic is: IN WITHINNDLG route if (has_totag()) { if (loose_route()) { if (is_method("BYE")) { if (sht_match_name("fsdest", "eq", "$fU:$rU")) { $sht(fsdest=>$fU:$rU) = $null; //BYE A->B } else { $sht(fsdest=>$rU:$fU) = $null; //BYE A<-B } } handle_ruri_alias(); route(RELAY); } } Another entry is setting up if blind transfer is made. If INVITE is coming from one of FSs, and have 'Referred-By' field. IN DIALOG route: if (is_present_hf("Referred-By")) { $sht(fsdest=>$fU:$rU) = $si; } For now it's working. Entries are written and deleted properly. *Problem with Attended transfer.* 1) A --> B = htable entry A:B=xxxx 2) A --> C = htable entry A:C=xxxx(checked and set same FS addr because $fU is present (If only it's worked as it should)) 3) Att transfer (Refer $rU B, referred-by - A. Refer-To - C) B --> C = all related entries deleted from table over BYE logic. 4) No entry B --> C (no INVITE was sent, bridged by REFER) So, logic for check active calls in htable is broken now, because we don't have entry B-->C *How can I handle writing to htable in Attended transfer case?* If another Invite will come FROM or TO B or C = there will be no htable entry. I'm not sure this is even a correct way. Surely missing something. ============================================================================================= ============================================================================================= 2) PROBLEM WITH IDENTIFYING TABLE ENTRIES Anyway, the main problem is with identifying those htables to set proper $du. If INVITE is coming TO FSs I need to check if caller ID ($fU) or dest ($rU) is present in htables. Form I need to write to hash must be like $fU:$rU Entry must be unique or it will be: 1) rewrited anytime a new invite is going to the same dest. 2) deleted anytime BYE or failure will come eg: If $sht(fsdest=>$rU) = $dd 1) 1000 --> 3200 = htable entry 3200 = xxxx 2) 1005 --> 3200 = htable entry rewriten to the same 3200 = xxxx When 1000 or 1005 leaving conf, it sends BYE and removes entry. So, next call to 3200 may be sent to the wrong FS. Ok, we have a unique entry ($fU:$rU). Checking for active destination: if (sht_match_name("fsdest", "re", ":$rU")) {} If there's an htable with $rU in key - we got a match. Now we need to assign a value from htable to $du. But, I don't know how to get the name of this entry. There's always different $fU: (or $rU if we check for the same caller ID ($fU)). eg: 1000 --> 3200 = htbale 1000 --> 3200 New call 1005 --> 3200 Check sht_match name ":3200" - got match We need to set: $du = $sht(fsdest=>$fU:$rU) But it will be $sht(fsdest=>1005:3200) and we don't have this entry. We need (fsdest=>1003:3200) But i don't see any way to get needed $fU. *Is there any way to search or identify these tables?* ============================================================================================= ============================================================================================= Can someone help me with this, please? :-) Or maybe there is a better way to do this? *My kamailio.cfg routing block in pastebin, if neededhttps://pastebin.com/1PZ0QSDW <https://pastebin.com/1PZ0QSDW>* Thank you! Regards, Tim

4 5

Info: Kamailio World 2021 starting soon - live stream
by Daniel-Constantin Mierla 10 Sep '21

10 Sep '21

Hello, to sync better on time, Kamailio World 2021 online edition is starting in about 2 hours from now (12:50 UTC Welcome and 13:00UTC the first session) - the agenda is available at: * https://kamailioworld.com/k09-online/ In short: participation is free, no registration is needed. The sessions are live streamed to YouTube KamailioWorld channel: * https://www.youtube.com/c/KamailioWorld/ YouTube chat next to the live stream can be used for addressing questions to speakers -- we will monitor it and ask the speaker inside the video conferencing room. For community interaction via text chatting, you can join the Matrix room #kamailio:matrix.kamailio.dev : * https://riot.kamailio.dev/#/room/#kamailio:matrix.kamailio.dev Questions for speakers can also be addressed in this chat room. If anyone wants to participate in the live video conferencing room, the URL is: * https://meet.kamailioworld.com/live Just note that we may have to limit the number of participants in the live session in order to ensure proper streaming quality. See you soon online! Cheers, Daniel -- Daniel-Constantin Mierla -- www.asipto.com www.twitter.com/miconda -- www.linkedin.com/in/miconda

5 9

RPC usrloc ul.add problem
by Pepelux 09 Sep '21

09 Sep '21

Hi all I have problems adding a new location by RPC command. *# kamailio -v* version: kamailio 5.5.0 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 8.3.0 A simple example, adding an AOR which expires in 1 hour: *# date ; kamcmd ul.add kam_location 1002-test1(a)sipserver.com <1002-test1(a)sipserver.com> sip:1002-test1@192.168.89.82 <sip%3A1002-test1(a)192.168.89.82> 3600 0.0 . 0 0 0 .* Wed 08 Sep 2021 01:58:00 PM CEST Location record has been inserted correctly: *# date ; kamcmd ul.dump | grep test -A24* Wed 08 Sep 2021 01:58:02 PM CEST AoR: 1002-test1(a)sipserver.com HashID: -597689288 Contacts: { Contact: { Address: sip:1002-test1@192.168.89.82 Expires: 3598 Q: 0.000000 Call-ID: dfjrewr12386fd6-343(a)kamailio.rpc CSeq: 1 User-Agent: kamailio SIP Router - RPC Server Received: [not set] Path: [not set] State: CS_SYNC Flags: 0 CFlags: 0 Socket: [not set] Methods: 0 Ruid: ulcx-61389f47-2e44-01 Instance: [not set] Reg-Id: 0 Server-Id: 0 Tcpconn-Id: 0 Keepalive: 0 Last-Keepalive: 1631102280 KA-Roundtrip: 0 Last-Modified: 0 } } } But a few seconds later, the location record has gone: * # date ; kamcmd ul.dump | grep test -A24* Wed 08 Sep 2021 01:58:26 PM CEST In kamailio logs I can see that: * Sep 8 13:58:00 sipserver /usr/sbin/kamailio[11844]: DEBUG: usrloc [ul_rpc.c:637]: ul_rpc_add(): path == 0 -> unset Sep 8 13:58:00 sipserver /usr/sbin/kamailio[11844]: DEBUG: usrloc [ul_rpc.c:652]: ul_rpc_add(): ret: 10 table:kam_location aor:1002-test1@sipserver.com <aor%3A1002-test1(a)sipserver.com> contact:sip:1002-test1@192.168.89.82 <contact%3Asip%3A1002-test1(a)192.168.89.82> expires:3600 dtemp:0.000000 path: flags:0 bflags:0 methods:0 Sep 8 13:58:00 sipserver /usr/sbin/kamailio[11844]: DEBUG: usrloc [ul_rpc.c:660]: ul_rpc_add(): q:0 Sep 8 13:58:00 sipserver /usr/sbin/kamailio[11844]: DEBUG: usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:00 sipserver /usr/sbin/kamailio[11844]: DEBUG: usrloc [ucontact.c:1868]: uldb_insert_attrs(): no location attributes* Sep 8 13:58:03 sipserver /usr/sbin/kamailio[11827]: DEBUG: {1 81337 REGISTER 1955770655-18357-1(a)BJC.BGI.B.BBF REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:03 sipserver /usr/sbin/kamailio[11827]: DEBUG: {1 81337 REGISTER 1955770655-18357-1(a)BJC.BGI.B.BBF REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:03 sipserver /usr/sbin/kamailio[11827]: DEBUG: {1 81337 REGISTER 1955770655-18357-1(a)BJC.BGI.B.BBF REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:04 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 141 REGISTER 1aa357700bd0696702c40340595d89e7(a)185.99.186.215 REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:04 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 141 REGISTER 1aa357700bd0696702c40340595d89e7(a)185.99.186.215 REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:04 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 141 REGISTER 1aa357700bd0696702c40340595d89e7(a)185.99.186.215 REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:06 sipserver /usr/sbin/kamailio[11852]: DEBUG: {1 114 REGISTER 5ne5ebv674tptk0p1uj4gg REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:06 sipserver /usr/sbin/kamailio[11852]: DEBUG: {1 114 REGISTER 5ne5ebv674tptk0p1uj4gg REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:06 sipserver /usr/sbin/kamailio[11852]: DEBUG: {1 114 REGISTER 5ne5ebv674tptk0p1uj4gg REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:23 sipserver /usr/sbin/kamailio[11828]: DEBUG: {1 12484 REGISTER 1382185578-19234-1(a)BJC.BGI.B.BGC REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:23 sipserver /usr/sbin/kamailio[11828]: DEBUG: {1 12484 REGISTER 1382185578-19234-1(a)BJC.BGI.B.BGC REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:23 sipserver /usr/sbin/kamailio[11828]: DEBUG: {1 12484 REGISTER 1382185578-19234-1(a)BJC.BGI.B.BGC REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes * Sep 8 13:58:23 sipserver /usr/sbin/kamailio[11835]: DEBUG: usrloc [urecord.c:377]: wb_timer(): tcp connection has been lost, expiring contact sip:1002-test1@192.168.89.82 <sip%3A1002-test1(a)192.168.89.82> Sep 8 13:58:23 sipserver /usr/sbin/kamailio[11835]: DEBUG: usrloc [urecord.c:387]: wb_timer(): Binding '1002-test1(a)sipserver.com <1002-test1(a)sipserver.com>','sip:1002-test1@192.168.89.82 <sip%3A1002-test1(a)192.168.89.82>' has expired Sep 8 13:58:23 sipserver /usr/sbin/kamailio[11835]: DEBUG: usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes* Sep 8 13:58:25 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 185389 REGISTER 1487655759-19321-1(a)BJC.BGI.B.BBB REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:25 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 185389 REGISTER 1487655759-19321-1(a)BJC.BGI.B.BBB REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:25 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 185389 REGISTER 1487655759-19321-1(a)BJC.BGI.B.BBB REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:33 sipserver /usr/sbin/kamailio[11853]: DEBUG: {1 3360 REGISTER pgmirc5oirbekeaj3tmrf7 REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:33 sipserver /usr/sbin/kamailio[11853]: DEBUG: {1 3360 REGISTER pgmirc5oirbekeaj3tmrf7 REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:33 sipserver /usr/sbin/kamailio[11853]: DEBUG: {1 3360 REGISTER pgmirc5oirbekeaj3tmrf7 REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:44 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 5645 REGISTER 89744034-6071-1(a)BJC.BGI.A.BJ REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:44 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 5645 REGISTER 89744034-6071-1(a)BJC.BGI.A.BJ REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:44 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 5645 REGISTER 89744034-6071-1(a)BJC.BGI.A.BJ REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:44 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 5683 REGISTER 1974024198-16543-1(a)BJC.BGI.B.BDE REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:44 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 5683 REGISTER 1974024198-16543-1(a)BJC.BGI.B.BDE REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:44 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 5683 REGISTER 1974024198-16543-1(a)BJC.BGI.B.BDE REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:50 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 144820 REGISTER 381139623-5062-1(a)BJC.BGI.B.BAD REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:50 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 144820 REGISTER 381139623-5062-1(a)BJC.BGI.B.BAD REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:50 sipserver /usr/sbin/kamailio[11829]: DEBUG: {1 144820 REGISTER 381139623-5062-1(a)BJC.BGI.B.BAD REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:58:59 sipserver /usr/sbin/kamailio[11828]: DEBUG: {1 84973 REGISTER 467700456-5060-1(a)BJC.BGI.B.BCI REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:58:59 sipserver /usr/sbin/kamailio[11828]: DEBUG: {1 84973 REGISTER 467700456-5060-1(a)BJC.BGI.B.BCI REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:58:59 sipserver /usr/sbin/kamailio[11828]: DEBUG: {1 84973 REGISTER 467700456-5060-1(a)BJC.BGI.B.BCI REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:59:01 sipserver /usr/sbin/kamailio[11854]: DEBUG: {1 116 REGISTER 5ne5ebv674tptk0p1uj4gg REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:59:01 sipserver /usr/sbin/kamailio[11854]: DEBUG: {1 116 REGISTER 5ne5ebv674tptk0p1uj4gg REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:59:01 sipserver /usr/sbin/kamailio[11854]: DEBUG: {1 116 REGISTER 5ne5ebv674tptk0p1uj4gg REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes Sep 8 13:59:04 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 81338 REGISTER 1955770655-18357-1(a)BJC.BGI.B.BBF REGISTER} usrloc [ucontact.c:1801]: uldb_delete_attrs_ruid(): trying to delete location attributes Sep 8 13:59:04 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 81338 REGISTER 1955770655-18357-1(a)BJC.BGI.B.BBF REGISTER} usrloc [ucontact.c:72]: ucontact_xavp_store(): trying to clone per contact xavps Sep 8 13:59:04 sipserver /usr/sbin/kamailio[11830]: DEBUG: {1 81338 REGISTER 1955770655-18357-1(a)BJC.BGI.B.BBF REGISTER} usrloc [ucontact.c:1857]: uldb_insert_attrs(): trying to insert location attributes What am I doing wrong? It is supposed that the connection is by UDP. I also tried to insert the socket value as UDP, but it had the same problem. Thanks!

3 6

Topos does not add record-route on invite
by Angelo Sipper 09 Sep '21

09 Sep '21

Hello, We have the following setup on Kamailio 5.3.7 (x86_64/linux) and I am trying to use topos module on Kamailio2 in order to hide our topology but, mostly to reduce the invite size as most of the times we have fragmentation on invites from Kamailio1 as Kamailio1 it adds 2 record-routes and two via as it handles TLS from one side and UDP on the other side and we have found no wat to avoid all this info even with topos enabled on Kamailio1 there is no change on this. UA (OverTLS) -> Kamailio1 (Over UDP)-> Kamailio2 (Over UDP)-> Provider UA :50.50.50.50:5065 (TLS) Kamailio1: 170.170.170.210:5061 (TLS),170.170.170.210:5060 (UDP) Kamailio2: 170.170.170.170:5060 (UDP) Provider: 200.200.200.193:5060 (UDP) Kamailio1 does not run topos. Kamailio2 does run topos and rr with bellow settings: # ------ topos ------ modparam("topos", "db_url", DBURL) modparam("topos", "mask_callid", 0) modparam("topos", "sanity_checks", 0) modparam("topos", "branch_expire", 130) # 3 Min modparam("topos", "dialog_expire", 10800) # 3 Hours modparam("topos", "clean_interval", 60) modparam("topos", "event_mode", 3) modparam("topos", "contact_host", " sbc181.myserver.com") # ----- rr params ----- # set next param to 1 to add value to ;lr param (helps with some UAs) modparam("rr", "enable_full_lr", 0) modparam("rr", "ignore_sips", 1) # 0 = do not append from tag to the RR, 0 = append from tag to the RR modparam("rr", "append_fromtag", 0) # dual RR 0 = No, 1 = Yes when needed 2 = Always modparam("rr", "enable_double_rr", 0) The problem is that on the invite from Kamailio2 to provider, topos adds only VIA kai new contact. No record route at all. So the provider sends multiple 200 ok SDPs to wrong IPs. If I disable topos module on kamailio2 everything works fine except that we have huge invite as another VIA and another record route is added having now three of each and fragmentation is present. *Invite from Kamailio1 to Kamailio2* ------------------------------------------------- 2021/09/08 21:41:57.698823 170.170.170.210:5060 -> 170.170.170.181:5060 INVITE sip:1234567890@sip.myserver.com:5060 SIP/2.0 Record-Route: <sip:170.170.170.210;r2=on;lr;ftag=1b973153-4034-4480-89d3-c47b411bd81e;vsf=AAAAAFpUAgEBBwEAAXABAG5BR0EAQUBCZXJ2b2ljZS5ldQ--;vst=AAAAAAoMDgsBBQcGAgIAdENbQG4AFxNUXAUaGQYXWAocY2UuZXU-;did=ff2.96a;nat=yes> Record-Route: <sip:170.170.170.210:5061 ;transport=tls;r2=on;lr;ftag=1b973153-4034-4480-89d3-c47b411bd81e;vsf=AAAAAFpUAgEBBwEAAXABAG5BR0EAQUBCZXJ2b2ljZS5ldQ--;vst=AAAAAAoMDgsBBQcGAgIAdENbQG4AFxNUXAUaGQYXWAocY2UuZXU-;did=ff2.96a;nat=yes> Via: SIP/2.0/UDP 170.170.170.210;branch=z9hG4bKd703.e095cdba1da1a4b1599119c9135b7838.0;i=8eb41 Via: SIP/2.0/TLS 50.50.50.50:5065 ;received=50.50.50.50;rport=31090;branch=z9hG4bKPj9196e5f9-977c-4a53-a4c0-c0ab82b095da;alias From: 987654321 <sip: 987654321(a)sip.myserver.com >;tag=1b973153-4034-4480-89d3-c47b411bd81e To: <sip: 1234567890(a)sip.myserver.com> Contact: <sip:customer1@50.50.50.50:5065 ;transport=TLS;alias=50.50.50.50~31090~3> Call-ID: cd64414e-77d5-45b4-a52d-74ec7fb5c7ef CSeq: 15776 INVITE Supported: 100rel, timer, replaces, norefersub Session-Expires: 1800 Min-SE: 90 Max-Forwards: 69 Content-Type: application/sdp Content-Length: 231 P-Asserted-Identity: <sip: 987654321(a)sip.myserver.com> v=0 o=- 391641952 391641952 IN IP4 170.170.170.216 s=Asterisk c=IN IP4 170.170.170.216 t=0 0 m=audio 29478 RTP/AVP 8 0 18 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:18 G729/8000 a=sendrecv a=rtcp:29479 a=ptime:20 *Invite from Kamailio2 to Provider* ------------------------------------------------- 2021/09/08 21:41:57.715881 170.170.170.181:5060 -> 200.200.200.193:5060 INVITE sip: 1234567890@sbc181.myserver.com:5060 SIP/2.0 Via: SIP/2.0/UDP 170.170.170.181;branch=z9hG4bKd703.d45db1fd910c43c5e7c4f8711a5fca92.0 From: 987654321 <sip: 987654321(a)sip.myserver.com >;tag=1b973153-4034-4480-89d3-c47b411bd81e To: <sip:1234567890@sip.myserver.com> Call-ID: cd64414e-77d5-45b4-a52d-74ec7fb5c7ef CSeq: 15776 INVITE Supported: 100rel, timer, replaces, norefersub Session-Expires: 1800 Min-SE: 90 Max-Forwards: 68 Content-Type: application/sdp Content-Length: 231 P-Asserted-Identity: <sip: 987654321(a)sip.myserver.com> Contact: <sip:btpsh-c9-613903ef-21d75-1@sbc181.myserver.com> v=0 o=- 391641952 391641952 IN IP4 170.170.170.184 s=Asterisk c=IN IP4 170.170.170.184 t=0 0 m=audio 11450 RTP/AVP 8 0 18 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:18 G729/8000 a=sendrecv a=rtcp:11451 a=ptime:20 *Bellow you can see the flow* ---------------------------------------- 170.170.170.210:5060 170.170.170.170:5060 200.200.200.193:5060 qqqqqqqqqqwqqqqqqqqq qqqqqqqqqqwqqqqqqqqq qqqqqqqqqqwqqqqqqqqq 21:41:57.698823 x INVITE (SDP) x x +0.003788 x qqqqqqqqqqqqqqqqqqqqqqqqqq> x x 21:41:57.702611 x 100 trying -- your call is x x +0.013270 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x x 21:41:57.715881 x x INVITE (SDP) x +0.018529 x x qqqqqqqqqqqqqqqqqqqqqqqqqq> x 21:41:57.734410 x x 100 Trying x +0.804083 x x <qqqqqqqqqqqqqqqqqqqqqqqqqq x 21:41:58.538493 x x 183 Session Progress (SDP) x +0.014557 x x <qqqqqqqqqqqqqqqqqqqqqqqqqq x 21:41:58.553050 x 183 Session Progress (SDP) x x +0.483907 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x x 21:41:59.036957 x x 183 Session Progress (SDP) x +0.012009 x x <<<qqqqqqqqqqqqqqqqqqqqqqqq x 21:41:59.048966 x 183 Session Progress (SDP) x x +0.988036 x <<<qqqqqqqqqqqqqqqqqqqqqqqq x x 21:42:00.037002 x x 183 Session Progress (SDP) x +0.010960 x x <<<qqqqqqqqqqqqqqqqqqqqqqqq x 21:42:00.047962 x 183 Session Progress (SDP) x x +1.989085 x <<<qqqqqqqqqqqqqqqqqqqqqqqq x x 21:42:02.037047 x x 183 Session Progress (SDP) x +0.010947 x x <<<qqqqqqqqqqqqqqqqqqqqqqqq x 21:42:02.047994 x 183 Session Progress (SDP) x x +3.989064 x <<<qqqqqqqqqqqqqqqqqqqqqqqq x x 21:42:06.037058 x x 183 Session Progress (SDP) x +0.008860 x x <<<qqqqqqqqqqqqqqqqqqqqqqqq x 21:42:06.045918 x 183 Session Progress (SDP) x x +1.178240 x <<<qqqqqqqqqqqqqqqqqqqqqqqq x x 21:42:07.224158 x CANCEL x x +0.002725 x qqqqqqqqqqqqqqqqqqqqqqqqqq> x x 21:42:07.226883 x x CANCEL x +0.000372 x x qqqqqqqqqqqqqqqqqqqqqqqqqq> x 21:42:07.227255 x 200 canceling x x +0.016902 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x x 21:42:07.244157 x x 200 OK x +0.004590 x x <qqqqqqqqqqqqqqqqqqqqqqqqqq x 21:42:07.248747 x x 487 Request Terminated x +0.003547 x x <qqqqqqqqqqqqqqqqqqqqqqqqqq x 21:42:07.252294 x x ACK x +0.003737 x x qqqqqqqqqqqqqqqqqqqqqqqqqq> x 21:42:07.256031 x 487 Request Terminated x x +0.001161 x <qqqqqqqqqqqqqqqqqqqqqqqqqq x x 21:42:07.257192 x ACK x x x qqqqqqqqqqqqqqqqqqqqqqqqqq> x TCP is out of question from the provider. Any help to use topos or any other module to reduce the size of our invites to avoid fragmentation will be much appreciated! Regards, Angelo

2 1

manually append_branch to lookup result
by David Villasmil 07 Sep '21

07 Sep '21

Hello guys, I'm trying to dynamically add a branch after doing lookup. The user is found, but in some cases I need to add a branch and do parallel forking. So i'm basically doing: route[LOCATION] { if (!lookup("location")) { .... } if (something) { route(BRANCH_TO_EXTRA); } route(RELAY); } route[BRANCH_TO_EXTRA] { $fs = MY_SOCKET; append_branch("sip:$tU@" + $sel(cfg_get.pstn.gw_ip) + ":" + $sel(cfg_get.pstn.gw_port)); return; } For some reason only the branch appended is being used (I have append_branches=1) Ideas? David Villasmil email: david.villasmil.work(a)gmail.com phone: +34669448337

2 5

via header not removed wit hremove_hf()
by Richard Robson 07 Sep '21

07 Sep '21

during testing I need to remove a Via header This is the code snippet route[REPLACE_VIA] { xlog ("L_INFO", "[REPLACE_VIA] Start of block\n"); xlog ("L_INFO", "[REPLACE_VIA] $hdrc(Via) Via headers\n"); if(remove_hf("Via")) { xlog ("L_INFO", "[REPLACE_VIA] removed Via\n"); } else { xlog ("L_INFO", "[REPLACE_VIA] did not remove Via\n"); } xlog ("L_INFO", "[REPLACE_VIA] $hdrc(Via) Via headers\n"); and this is the logs output Sep 7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_RURI] Start of block Sep 7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] Start of block Sep 7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] 1 Via headers Sep 7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] removed Via Sep 7 08:00:00 INFO: _LOG: 3a547f956d65fe985ba189916047fc320ae150ad: [REPLACE_VIA] 1 Via headers From the logs it looks like the remove_hf returns true and we have the header removed, but its still counting the Via header and the Via Header is still present when the INVIE is releyed on Regards, Richard

2 4

Kamailio and robotics repo
by Yuriy Gorlichenko 07 Sep '21

07 Sep '21

Following the promise during the Kamailio world 2021 I share the source code of the Kamailoi and robotics repo: https://github.com/arigativa/robolive

2 1

Manage multiple RTP streams with different TO-tags (forking)
by B. Tietz 07 Sep '21

07 Sep '21

Hello, following situation. I have a Kamailio (5.4) using rtpengine to loadbalance calls. If a call from Alice comes in, Kamailio decides to send the call to Carrier B from Bob. Bobs Phone is ringing and the carrier B send a 183 Session Progress with SDP and To-tag=abcd. The SDP has G722 as codec and port 1234. A few moments later carrier B send a second 183 Session Progress with SDP and TO-tag=fghi. The SDP has G711 as codec and port 5678. This is done, to play some funky music as ringtone -.- If Bob answers the call, carrier B sends a 200 OK WITHOUT SDP and TO-tag=abcd. So this should instruct our Kamailio to switch to the first G722 and port 1234. But sadly, this is just not working as expected. We tried to set the flags media-handover and port-latching for the rtpengine options and additionally set a to-tag when using rtpenging_manage. But this doesn't solve the codec change, so we have only audio when Bob answers the call, but no ringtone-music. If we allow G711 only in the outgoing INVITE to Bob, we have also tha ringtone-muisic, because there is no codec-change. Carrier B tells us, they are using a fork-mechanism. Is there something we can do, to support the codec change in 183? Or enforce carrier B to send SDP in 200 OK? Or anything else? Carrier B can not change anything in the ringtone-music-backend. They are stuck on G711. Thanks!

5 4

Re: [SR-Users] t_drop_replies not working with t_suspend in failure route
by Huber Andreas 03 Sep '21

03 Sep '21

Hi, We’re still using kamailio 4.4 but we’ll be migrating to 5.0 soon. Cool so it will be fixed when we migrate ! Thanks, Andreas From: sr-users [mailto:sr-users-bounces@lists.kamailio.org] On Behalf Of Federico Cabiddu Sent: vendredi 12 mai 2017 11:56 To: Kamailio (SER) - Users Mailing List Subject: Re: [SR-Users] t_drop_replies not working with t_suspend in failure route Hi, which version are you using? A similar case had been reported some months ago and it should be fixed in 5.0. Regards, Federico On Fri, May 12, 2017 at 11:44 AM, Huber Andreas <andreas.huber(a)nagra.com<mailto:andreas.huber@nagra.com>> wrote: Hello, We have a use case where we suspend a transaction in a failure_route to give UEs that might be woken by a push notification more time to REGISTER and join the INVITE. We’d like to drop the previous branches in this case. I tried using t_drop_replies() but it has no effect. The doc states that t_drop_replies() is only working if a new branch is added. And from my understanding t_suspend() adds a new branch. But is it possible that t_drop_replies() cannot be used with t_suspend()? Or am I missing something? Kind Regards, Andreas _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org<mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

2 1

How to drop negative final response and send ACK
by Koray Vatansever 02 Sep '21

02 Sep '21

Hi, I have a problem with the following scenario: I have web and mobile sip clients for the same username. If both clients are idle, INVITE is forked and both clients ring. If web client is busy and mobile client is online and registered, the mobile client rings and the caller hears ringback tone. If web client is busy and mobile client is offline, before the mobile client receives push notification and registers, web client sends 486 busy response and caller hears busy tone. In this last scenario, I want to wait some time for the mobile client to register and ring. I tried to drop 486 response in onreply_route[x], but I found that final responses cannot be dropped in this route. I dropped 486 in reply_route, but I couldn't send an ACK for this transaction. Is there a way to implement this scenario? I would appreciate if you have any suggestions. Thanks, Koray

2 2

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sr-users September 2021