sr-users March 2024

sr-users@lists.kamailio.org

44 participants
46 discussions

TLS requests get relayed over unencrypted TCP
by James Browne 13 Mar '24

13 Mar '24

Hi all I've set up a kamailio server on a public IP address to serve public clients. - The clients REGISTER over a mix of TCP and TLS, so kamailio has listeners on the same IP address: port 5060 for UDP/TCP and port 5061 for TLS. - Some clients REGISTER from the same public IP address, behind the same NAT. - Sometimes, the client-side NAT can use the same client-side IP address and port for two concurrent connections - one TCP and one TLS - which is normal because the server-side port is different (they're different 5-tuples). - Now when a request comes to kamailio, to be routed to a client, the the t_relay_to_tls() function sometimes can relay the request over a TCP connection instead of a TLS connection. I've enabled tcp_connection_match=1. This is helpful, but it doesn't completely resolve the problem. It helps when both connections (TCP and TLS) are open, because the TLS connection will always be used for TLS requests. However, when there's no TLS connection open, kamailio will erroneously use the TCP connection. Note that this setup depends on TCP/TLS connections being made from the client to the server, not the other way around. I've made a cut-down version of this setup to demonstrate the problem. - Client: 11.15.32.1 - Server: 11.15.32.11 - version: kamailio 5.9.0-dev0 (x86_64/linux) ################################################################# #!KAMAILIO enable_tls=yes listen=tls:11.15.32.11:5061 listen=tcp:11.15.32.11:5060 listen=udp:11.15.32.11:5060 loadmodule "tm" loadmodule "tls" loadmodule "pv" loadmodule "rr" fork=yes log_facility=LOG_LOCAL0 log_stderror=no children=2 debug=3 tcp_connection_match=1 modparam("tls", "low_mem_threshold1", -1) modparam("tls", "low_mem_threshold2", -1) modparam("tls", "certificate", "/usr/local/etc/kamailio/certs/chain") modparam("tls", "private_key", "/usr/local/etc/kamailio/certs/key") request_route { loose_route(); $fs="tls:11.15.32.11:5061"; t_relay_to_tls(); } ################################################################# This is a BYE message to be sent from internally in the network. ########################### BYE sip:user3@11.15.32.1:33333;transport=tls SIP/2.0 Via: SIP/2.0/UDP 0.0.0.0:11111;rport;branch=z9hG4bK-d8754z-cc2c63344f5218d3-1 Route: <sip:11.15.32.11:5060;transport=tcp;r2=on;lr;ftag=ZUrDU2m4Z9Zam> Route: <sip:11.15.32.11:5061;transport=tls;r2=on;lr;ftag=ZUrDU2m4Z9Zam> f: <sip:user1@server>;tag=ZUrDU2m4Z9Zam t: <sip:user3@server>;tag=gK0ea97395 i:sdfg8we790t874ujk CSeq: 102 BYE Content-Length: 0 ########################### When I send that to kamailio over UDP, kamailio relays it over a TCP connection, as seen with socat here (socat runs on the machine with address 11.15.32.1). ########################### $ socat - TCP:11.15.32.11:5060,bind=:33333 BYE sip:user3@11.15.32.1:33333;transport=tls SIP/2.0 Via: SIP/2.0/TLS 11.15.32.11:5061;branch=z9hG4bKd2bf.137932ff9a937cde941fd1790db040c9.0 Via: SIP/2.0/UDP 0.0.0.0:11111;received=11.15.32.11;rport=11111;branch=z9hG4bK-d8754z-cc2c63344f5218d3-1 f: <sip:user1@server>;tag=ZUrDU2m4Z9Zam t: <sip:user3@server>;tag=gK0ea97395 i:sdfg8we790t874ujk CSeq: 102 BYE Content-Length: 0 ########################### Note that - the RURI has transport=tls in it, - kamailio is forcing the TLS socket, - kamailio is using the t_relay_to_tls function, - the Route header field tells that TLS should be used, and - the Via header field shows that kamailio tried to send this over TLS, but - the BYE was sent over unencrypted TCP. If I use this socat command instead, then I can receive the BYE, showing that kamailio is able to use TLS if there's a connection available. - socat - OPENSSL:11.15.32.11:5061,bind=:33333,verify=no I can't find any setting to control this, so it looks to me like a kamailio bug. At that, I see this as a security flaw, because the SIP traffic should always be encrypted but now is leaked. Can anyone help? James

1 0

Lua classes in events function
by Michal Hajek 12 Mar '24

12 Mar '24

Hi, I use KEMI/Lua. I have simple lua class: myclass = {} myclass.event = function() KSR.xlog.xinfo("Event working...\n") end In kamailio.conf have: modparam("xhttp", "event_callback", "myclass.event") In debug log have: Mar 12 13:21:30 kamailio DEBUG: app_lua [app_lua_api.c:549]: sr_lua_reload_script(): No need to reload [/etc/kamailio/donjon.lua] is version 0 Mar 12 13:21:30 kamailio DEBUG: app_lua [app_lua_api.c:733]: app_lua_run_ex(): executing Lua function: [[myclass.event]] Mar 12 13:21:30 kamailio DEBUG: app_lua [app_lua_api.c:735]: app_lua_run_ex(): lua top index is: 40 Mar 12 13:21:30 kamailio DEBUG: app_lua [app_lua_mod.c:164]: sr_kemi_config_engine_lua(): execution of route type 513 with name [myclass.event] returned 1 The problem is that the event function in the myclasses class is not called. Is there any other way or syntax to do this? Of course, if I define a function without a class, it works. Thanks Michal

1 0

5.8 acc module failed_filter error
by Juha Heinanen 12 Mar '24

12 Mar '24

My SIP proxy didn't start with Kamailio 5.8 using the same config that starts OK with 5.7. The error is: 2024-03-11T06:56:06.457107+02:00 lohi /usr/bin/sip-proxy[2358954]: DEBUG: acc [acc_mod.c:362]: parse_failed_filter(): failed_filter 0 = 407 2024-03-11T06:56:06.457265+02:00 lohi /usr/bin/sip-proxy[2358954]: ERROR: acc [acc_mod.c:369]: parse_failed_filter(): response code is not followed by comma or end of string 2024-03-11T06:56:06.457436+02:00 lohi /usr/bin/sip-proxy[2358954]: ERROR: acc [acc_mod.c:439]: mod_init(): failed to parse failed_filter param The relevant params are: modparam("acc", "failed_transaction_flag", 8) modparam("acc", "failed_filter", "407") I didn't find any difference in acc_mod.c source code between 5.7 and 5.8 and parse_failed_filter function looked OK. Then I added a debug statement in the beginning of parse_failed_filter function: LM_DBG("parsing failed_filter %s\n", s); and got to syslog: cc_mod.c:341]: parse_failed_filter(): parsing failed_filter 407rmissions|pua|rtpengine)$ That explains the parse_failed_filter error, but where does that bogus param value come from? Before acc params I have: modparam("auth_db|dialplan|domain|htable|lcr|msilo|mtree|permissions|pua|rtpengine", "db_url", "mysql://xxxx/sip_proxy") modparam("registrar|nathelper", "received_avp", "$avp(received_uri)") So it from there, but why? Is there a bug somewhere or is my SIP proxy running out of memory or something? Before the above error messages, there are no other error messages. -- Juha

2 5

Kamailio Yocto package
by Olle E. Johansson 11 Mar '24

11 Mar '24

Hello Kamailians! Before I start going down this path - anyone that has written a Kamailio Yocto layer and want to share either layer or experience or both? For those that doesn’t know: Yocto is a toolkit for building your own Linux distros for embedded systems. /O

1 0

SIP Redirect Server
by Antonio 11 Mar '24

11 Mar '24

Hi everyone I have a small question: i want to set up a basic SIP Redirect Server so I install Kamailio v5.3 and comment default request route and set simple request_route { rewritehostport("1.2.3.4"); sl_send_reply("302", "Moved Temporarily"); } but for some reason, Kamailio does not care about the port and sends a reply to 5060 [image: image.png] i also tried to delete rewritehostport but it only deletes Contact: from the reply but reply itself is still sent to 5060 port [image: image.png] -- *Antony* satskiy.a(a)gmail.com +380669197533 +48727830247

4 4

5.8 compiler warning
by Juha Heinanen 10 Mar '24

10 Mar '24

Kamailio 5.8 build generates on my Debian 12 the following warning: core/mem/q_malloc.c:996:14: warning: 'qm_strnstr' defined but not used [-Wunused-function] 996 | static void *qm_strnstr(const void *b1, int l1, const void *b2, int l2) | ^~~~~~~~~~ Perhaps the definition of the function should be #ifdef'ed by DBG_QM_MALLOC. -- Juha

1 0

SSL key logger for Diffie-Hellman cipher
by Calvin E. 08 Mar '24

08 Mar '24

I've been tasked to use LD_PRELOAD to log SSL keys for TLS connections using a Diffie-Hellman cipher. The first attempt did not work, so I wanted to sanity check whether Kamailio's TLS support is built in such a way that would defeat LD_PRELOAD. The instructions from the vendor are to update /etc/init.d/kamailio like this: env SSLKEYLOG_UDP='127.0.0.1:1234' LD_PRELOAD="/usr/local/src/voipmonitor-git/tools/ssl_keylogger/sslkeylog.so /usr/lib/x86_64-linux-gnu/libssl.so.3" \ start-stop-daemon --start --quiet --pidfile $PIDFILE \ --exec $DAEMON -- $OPTIONS || log_failure_msg " already running" Is there anything special in Kamailio (5.7.3 on Debian 12) that would prevent this from working? Not necessarily something to defeat a keylogger, but maybe the way tls.so gets loaded? The only discrepancy I've noticed is the vendor docs refer to libssl.so.3 not libssl.so.1, but the vendor said that should be OK. I'd love to hear from someone already using VoIPmonitor with Diffie-Hellman ciphers and Kamailio.

6 16

from TCP to UDP and Kamailio doing it wrong
by Alberto Diez 08 Mar '24

08 Mar '24

Hi kamailio community, I have an issue with a Kamailio 5.7. It's listening both in TCP and UDP. In my scenario requests arrive from devices on TCP, but I want to forward to the next hops on UDP. I am avoiding using any type of DNS resolution; since I am always forwarding to predefined next hops I am using the dispatcher module (defined with the IP addresses and transport=udp) or I wrote config files using t_relay_to_udp or t_relay_to with a udp: followed by IP address. I never set up FQDNS only IP addresses and in all of them I explicitly mention UDP. In all of these scenarios I have tried Kamailio insists in trying to use TCP with the next hop and failing because the next_hop is only UDP. I guess because the message arrived using TCP Kamilio does that but I find the behavior very confusing. I nailed down that in my situation its the tm module function prepare_new_uac (in file src/modules/tm/t_fwd.c line 119) being the one that missbehaves. The documentation of the function says literraly : "* t->uac[branch].request.dst will be filled if next_hop !=0 with the result * of the DNS resolution (next_hop, fproto and fsocket). * If next_hop is 0 all the dst members except the send_flags are read-only * (send_flags it's updated) and are supposed to be pre-filled." I found out that even when next_hop is 0 the function changes the t->uac[branch].request.dst proto, socket etc. its there that the kamailio takes the wrong decision, until that function is called within add_auc, the destination proto or the fproto etc is always 1 (UDP) which is what I am trying to force from the config file or the dispatcher definition (I tried both ways). But after calling that function then it comes as a 2 (TCP) The problematic function is a monster of 500 lines and I would like to avoid having to understand it. Since I think the scenario is not so unusual I just want to ask if maybe I am missing something that I should do to avoid the Kamailio to select TCP and in order to have the tm module respecting my preference for UDP (either with dispatcher module and the transport param or with t_relay_to or t_relay_to_udp I don't care the way). Any hints are welcome. Best regards alberto

5 9

direct media between UACs
by Sergio Charrua 08 Mar '24

08 Mar '24

Hi all! got a weird behavior that I cannot understand the reason for... In our LAB environment, we have 2 Asterisk instances (version 13.38.3 and chan_sip) and 1 Kamailio 5.7 in between. All servers are in the same network, so, there is no NAT involved. No RTPEngine either. Network is 10.20.0.0/24 and Asterisk #1 has IP .1 Asterisk #2 has IP .3 and Kamailio has IP .5 The Asterisk servers are used only for testing, nothing serious. However, Kamailio is setup to use RTJson requesting routes to a Routing Server on the same network. And it works fine. Both Asterisk servers have the same dialplan, which only Answers the call and plays MOH on both ends so that RTP audio streams both ways. When making a call on Asterisk Server #1 via command line to go directly to Asterisk Server #2 without using Kamailio (CLI> channel originate SIP/123(a)10.20.0.3 application MusicOnHold() ) the Asterisk #2 receives the call, answers and plays MOH too and I can see RTP streams coming from both ends correctly. However, if I use Kamailio to proxy the call generated from Asterisk #1 to Asterisk #2, using similar command line instruction (CLI> channel originate SIP/123(a)10.20.0.5 application MusicOnHold() ), the call is indeed received on Kamailio who then sends it to Asterisk #2, who answers the call and plays MOH, *but* despite the audio stream being sent to Asterisk #1 it is never received, however audio from Asterisk #1 is received by Asterisk #2, which configures a typical One Way Audio issue due to NAT. This is where it gets strange, because there is no NAT, SDP on INVITE and SIP 200 messages seem OK, as far as I understand it. Also, Asterisk servers have SIP configuration with directmedia enabled and NAT disabled to make sure that media is direct. But I have also tried with directmedia disabled and NAT enabled and get identical results. I am most probably missing some tiny detail, but I have no clue.... and I bet it is simple and stupid.... Could another pair of eyes help me with this? What is wrong? Do I really need RTPEngine even when the network has no NAT? I am sure it would work that way, but it doesn't make sense... Here are some screenshots: Call Scenario #1 - direct call from Asterisk #1 to Asterisk #2 without Kamailio in between: Invite from Asterisk #1 to Asterisk #2 with direct media between both ends: https://drive.google.com/file/d/1eLjT3nr_Rc-UBaf4QhIgZ95bjETOVvxo/view?usp=… Replies from Asterisk #2 to Asterisk #1 with direct media between both ends: https://drive.google.com/file/d/11lLcB-V8rWGSrVqWiit-q9WX2FfqB6BZ/view?usp=… Call Scenario #2 - call from Asterisk #1 using Kamailio to relay call to Asterisk #2, with one way audio Invite from Asterisk #1 to Asterisk #2 via Kamailio with SDP details: https://drive.google.com/file/d/1Cp9xrGcwNmQ9Ks36N_oD1Dj7lxfu-tbH/view?usp=… Invite from Kamailio relayed to Asterisk #2 with SDP details from Asterisk #1 identical to above: https://drive.google.com/file/d/1mi3FCNjM3luXfENEp-0088XLgcyfXRK6/view?usp=… Reply from Asterisk #2 to Kamailio with SDP details: https://drive.google.com/file/d/1TpMGe2tvpX_5SIpSbm2b3Zro9EuYwcO-/view?usp=… Reply from Kamailio to Asterisk #2 with SDP details from Asterisk #2 identical to above: https://drive.google.com/file/d/12jq5APfFwVVPc0vJ3RkcXyN1hBE51fnQ/view?usp=… As we can see, SDP details seem OK, but if I check call flow on Asterisk #1, I can only find 1 RTP channel with audio coming from Asterisk #2 https://drive.google.com/file/d/1iEfvkylZVbthHM5kxkurWh-GAYCYLytl/view?usp=… and the same on Asterisk #2 : https://drive.google.com/file/d/12rvf9Lrwp-MNZvGCwlXEEBsBRmfcinph/view?usp=… My Kamailio.cfg is as follows: #!KAMAILIO # # config file for SIPProxy # - load balancing of VoIP calls # - no TPC listening # # Kamailio (OpenSER) SIP Server v3.2 # - web: http://www.kamailio.org # - git: http://sip-router.org # # # Refer to the Core CookBook at http://www.kamailio.org/dokuwiki/doku.php # for an explanation of possible statements, functions and parameters. # # Several features can be enabled using '#!define WITH_FEATURE' directives: # # *** To run in debug mode: # - define WITH_DEBUG # #!define WITH_DEBUG ###!define WITH_NAT #!define WITH_PSTN /* enables Accounting Log functions */ #!define FLT_ACC 1 /* enable Accounting of missed or failed calls */ #!define FLT_ACCMISSED 2 #!define FLT_ACCFAILED 3 /* defines DB connection string */ #!ifndef DBURL #!define DBURL "mysql://kamailio:kamailio@10.20.0.1:3306/kamailio" #!endif # - the value for 'use_domain' parameters #!define MULTIDOMAIN 1 ####### Global Parameters ######### #!ifdef WITH_DEBUG debug=4 log_stderror=no #!else debug=2 log_stderror=no #!endif #!define FLT_DISPATCH_SETID 1 #!define FLT_FS 10 #!define FLT_NATS 5 #!define FLB_NATB 6 #!define FLB_NATSIPPING 7 #!define FLT_SRC_ALLOWED 8 #!define FLT_DST_INTERNAL_IP 9 #!define FLT_SRC_INTERNAL_IP 10 #!substdef "!INTERNAL_IP_NET!10.20.0.0/24!g" #!substdef "!INTERNAL_IP_ADDR!10.20.0.2!g" #!substdef "!EXTERNAL_IP_ADDR!10.20.0.2!g" #!ifndef HTTP_ASYNC_CLIENT_WORKERS #!define HTTP_ASYNC_CLIENT_WORKERS 8 #!endif /* add API http timeout */ #!define HTTP_API_TIMEOUT 5000 #!define HTTP_API_ROUTING_ENDPOINT "http://10.246.212.40:7778/get_route" /* DMQ SIP message sharing */ #!define DMQ_PORT 5062 #!define DMQ_LISTEN "sip:10.20.0.2:5062" #!define DMQ_SERVER_ADDRESS "sip:10.20.0.2:5062" #!define DMQ_NOTIFICATION_ADDRESS "sip:10.20.0.4:5062" memdbg=5 memlog=5 log_facility=LOG_LOCAL0 log_prefix="{$mt $hdr(CSeq) $ci} " fork=yes children=8 /* comment the next line to enable TCP - all trunks are UDP only */ disable_tcp=yes /* uncomment the next line to disable the auto discovery of local aliases based on revers DNS on IPs (default on) */ auto_aliases=no port=5060 /* uncomment and configure the following line if you want Kamailio to bind on a specific interface/port/proto (default bind on all available) */ listen=udp:10.20.0.5:5060 advertise 10.20.0.5:5060 listen=tcp:10.20.0.5:5060 advertise 10.20.0.5:5060 listen=udp:10.20.0.2:5062 advertised_address="10.20.0.5"; sip_warning=no; use_dns_failover = on; ####### Modules Section ######## #set module path mpath="/usr/local/lib64/kamailio/modules/" loadmodule "db_mysql.so" loadmodule "jsonrpcs.so" loadmodule "kex.so" loadmodule "tm.so" loadmodule "tmx.so" loadmodule "sl.so" loadmodule "rr.so" loadmodule "pv.so" loadmodule "maxfwd.so" loadmodule "textops.so" loadmodule "siputils.so" loadmodule "xlog.so" loadmodule "sanity.so" loadmodule "ctl.so" loadmodule "acc.so" loadmodule "usrloc.so" loadmodule "nathelper.so" #loadmodule "rtimer.so" #loadmodule "sqlops.so" # --- CPS Limiter # --- end of CPS Limiter loadmodule "ipops.so" loadmodule "textopsx.so" loadmodule "sdpops.so" loadmodule "http_async_client.so" loadmodule "rtjson.so" loadmodule "jansson.so" loadmodule "dmq.so" loadmodule "dmq_usrloc.so" loadmodule "htable.so" loadmodule "dialog.so" #!ifdef WITH_DEBUG loadmodule "debugger.so" #!endif #!ifdef WITH_DEBUG # ----- debugger params ----- modparam("debugger", "log_level_name", "exec") #!endif # ----------------- setting module-specific parameters --------------- # ----- jsonrpcs params ----- modparam("jsonrpcs", "fifo_name", "/var/run/kamailio/kamailio_rpc.fifo") modparam("jsonrpcs", "pretty_format", 1) # ----- rr params ----- modparam("jsonrpcs", "fifo_name", "/var/run/kamailio/kamailio_rpc.fifo") modparam("jsonrpcs", "pretty_format", 1) # ----- rr params ----- # add value to ;lr param to cope with most of the UAs modparam("rr", "enable_full_lr", 1) # do not append from tag to the RR (no need for this script) modparam("rr", "append_fromtag", 0) # ----- acc params ----- modparam("acc", "failed_transaction_flag", 3) modparam("acc", "log_extra","src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si") # ----- acc params ----- /* what special events should be accounted ? */ modparam("acc", "early_media", 0) modparam("acc", "report_ack", 0) modparam("acc", "report_cancels", 0) /* by default we do not adjust the direct of the sequential requests. if you enable this parameter, be sure the enable "append_fromtag" in "rr" module */ modparam("acc", "detect_direction", 0) /* account triggers (flags) */ modparam("acc", "log_flag", FLT_ACC) modparam("acc", "log_missed_flag", FLT_ACCMISSED) modparam("acc", "log_extra","src_user=$fU;src_domain=$fd;src_ip=$si;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") modparam("acc", "failed_transaction_flag", FLT_ACCFAILED) /* enhanced DB accounting */ modparam("acc", "db_flag", FLT_ACC) modparam("acc", "db_missed_flag", FLT_ACCMISSED) modparam("acc", "db_url", DBURL) modparam("acc", "db_extra","src_user=$fU;src_domain=$fd;src_ip=$si;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") //;calltype=$avp(calltype)") # ----- tm params ----- # ----- the TM module enables stateful processing of SIP requests modparam("tm", "fr_timer", 5000) modparam("tm", "fr_inv_timer", 60000) modparam("tm", "remap_503_500", 0) # ----- usrloc params ----- /* enable DB persistency for location entries */ modparam("usrloc", "db_url", DBURL) modparam("usrloc", "db_mode", 2) modparam("usrloc", "use_domain", MULTIDOMAIN) # params needed for NAT traversal in other modules modparam("usrloc", "nat_bflag", FLB_NATB) # ----- nathelper params ----- modparam("nathelper", "received_avp", "$avp(s:rcv)") modparam("nathelper", "natping_interval", 30) modparam("nathelper", "ping_nated_only", 1) modparam("nathelper", "sipping_bflag", FLB_NATSIPPING) modparam("nathelper", "sipping_from", "sip:ping@kamailio.org") #modparam("rtimer", "timer", "name=cdr;interval=300;mode=1;") #modparam("rtimer", "exec", "timer=cdr;route=CDRS") #modparam("sqlops", "sqlcon", "ca=>mysql://kamailio:kamailiorw@10.19.139.113:3306/kamailio") #modparam("dmq", "server_socket", DMQ_SERVER_SOCKET ) modparam("dmq", "server_address", DMQ_SERVER_ADDRESS ) modparam("dmq", "notification_address", DMQ_NOTIFICATION_ADDRESS ) modparam("dmq", "multi_notify", 1) modparam("dmq", "num_workers", 4) modparam("dmq", "ping_interval", 60) modparam("dmq_usrloc", "enable", 1) # -- CPS Limiter modparam("htable", "htable", "rhs=>size=32;initval=0;autoexpire=10;") modparam("htable", "htable", "rhm=>size=32;initval=0;autoexpire=120;") modparam("htable", "enable_dmq", 1) modparam("htable", "dmq_init_sync", 1) modparam("dialog", "profiles_with_value", "concurrent_calls") modparam("dialog", "enable_dmq", 1) # ----- http_async_client params ----- modparam("http_async_client", "workers", HTTP_ASYNC_CLIENT_WORKERS) modparam("http_async_client", "connection_timeout", 2000) ####### Routing Logic ######## # main request routing logic route { if (is_method("KDMQ") && $Rp == 5062) { dmq_handle_message(); } xlog("L_INFO"," ********** Route START ***********"); # log the basic info regarding this call xlog("L_INFO","start|\n"); xlog("L_INFO","===================================================\n"); xlog("L_INFO","New SIP message $rm with call-ID $ci \n"); xlog("L_INFO","---------------------------------------------------\n"); xlog("L_INFO"," received $pr request $rm $ou\n"); xlog("L_INFO"," source $si:$sp\n"); xlog("L_INFO"," from $fu\n"); xlog("L_INFO"," to $tu\n"); xlog("L_INFO","---------------------------------------------------\n"); xlog("L_INFO","---------------------------------------------------\n"); # OPTIONS requests without a username in the Request-URI but one # of our domains or IPs are addressed to the proxy itself and # can be answered statelessly. if (is_method("OPTIONS")) { sl_send_reply("200","OK"); exit; } if ($fU=="ping") { sl_send_reply("200","OK"); exit; } # extract original source ip / port from X-forwarded-For header route(HANDLE_X_FORWARDED_FOR); # per request initial checks route(REQINIT); # NAT detection route(NATDETECT); # handle requests within SIP dialogs ### only initial requests (no To tag) # CANCEL processing if (is_method("CANCEL")) { if (t_check_trans()){ route(RELAY); } exit; } # handle retransmissions if (!is_method("ACK")) { if(t_precheck_trans()) { t_check_trans(); xlog("L_INFO", "ROUTE - Exiting after Retransmission check - method $rm"); exit; } t_check_trans(); } route(WITHINDLG); # record routing for dialog forming requests (in case they are routed) # - remove preloaded route headers xlog("L_INFO", "ROUTE - Removing Headers"); remove_hf("Route"); if (is_method("INVITE|SUBSCRIBE")){ t_on_failure("MANAGE_FAILURE"); xlog("L_INFO", "ROUTE - Recording Route"); record_route(); if (is_method("INVITE") && is_request()) { if (has_body("application/sdp")) { xlog("L_INFO", "ROUTE - goiing to t_on_reply[ON_REPLY]\n"); t_on_reply("ON_REPLY"); } } } if ($rU==$null) { # request with no Username in RURI sl_send_reply("484","ROUTE - Address Incomplete"); exit; } route(TOCARRIER); xlog("L_INFO", " ********** Route END *************"); } # extract original source ip / port from X-forwarded-For header route[HANDLE_X_FORWARDED_FOR] { if (is_present_hf("X-Forwarded-For")) { $var(source_ip) = $(hdr(X-Forwarded-For){s.select,0,:}); $var(source_port) = $(hdr(X-Forwarded-For){s.select,1,:}); } else { $var(source_ip) = $si; $var(source_port) = $sp; } $var(to_number) = $rU; } route[RELAY_API] { xlog("L_INFO","RELAY_API - from_ip $var(source_ip):$var(source_port) from_number $fU to_number $ru"); $http_req(all) = $null; $http_req(suspend) = 1; $http_req(timeout) = HTTP_API_TIMEOUT; $http_req(method) = "POST"; $http_req(hdr) = "Content-Type: application/json"; jansson_set("string","from_ip",$var(source_ip), "$var(http_routing_query)"); jansson_set("string","from_port",$var(source_port), "$var(http_routing_query)"); jansson_set("string","from_number",$fU, "$var(http_routing_query)"); jansson_set("string","to_number",$var(to_number) , "$var(http_routing_query)"); xlog("L_INFO","RELAY_API - API ASYNC ROUTING REQUEST: $var(http_routing_query)\n"); $http_req(body) = $var(http_routing_query); t_newtran(); http_async_query(HTTP_API_ROUTING_ENDPOINT, "RELAY_API_RESPONSE"); } # Relay request using the API (response) route[RELAY_API_RESPONSE] { if ($http_ok==1 && $http_rs==200) { xlog("L_INFO","RELAY_API_RESPONSE - RESPONSE: $http_rb\n"); if (jansson_get("rtjson", $http_rb, "$var(rtjson)")) { xlog("L_INFO","RELAY_API_RESPONSE - $var(rtjson)"); rtjson_init_routes("$var(rtjson)"); rtjson_push_routes(); # relay the message t_on_branch("MANAGE_BRANCH"); t_on_failure("MANAGE_FAILURE"); route(RELAY); return; } } send_reply(500, "API Not Available - http response = $http_rs $http_ok"); exit; } onreply_route[ON_REPLY] { xlog("L_INFO", "ON_REPLY - In onreply_route[ON_REPLY] $rs"); # on reply if (t_check_status("183|180|200")) { xlog("L_INFO", "ON_REPLY - Fixing Contacts"); # subst_hf("Contact","/@.*:/@EXTERNAL_IP_ADDR:/","a"); //subst_hf("Record-Route","/INTERNAL_IP_ADDR/EXTERNAL_IP_ADDR/","f"); } if (has_body("application/sdp")){ if (sdp_remove_line_by_prefix("a=maxptime")){ xlog("L_INFO", "ON_REPLY - remove maxptime "); msg_apply_changes(); } else{ xlog("L_INFO", "ON_REPLY - did not removed maxptime "); } } if (t_check_status("408")) { xlog("L_INFO", "ROUTE - Handling 408 Timeout\n"); } } route[TOCARRIER]{ #using rtjson, unsomment following line route(RELAY_API); } # Per SIP request initial checks route[REQINIT] { xlog("L_INFO", "REQINIT - Starting"); if (!mf_process_maxfwd_header("10")) { xlog("L_INFO", "REQINIT - 483 - Too Many Hops"); sl_send_reply("483","Too Many Hops"); exit; } if(!sanity_check("1511", "7")) { xlog("L_INFO","REQINIT - Sanity Check -> Malformed SIP message from $si:$sp\n"); exit; } } # Caller NAT detection route[NATDETECT] { xlog("L_INFO", "NATDETECT - Entering"); #!ifdef WITH_NAT force_rport(); if (nat_uac_test("19")) { if (is_method("REGISTER")) { xlog("L_INFO", "NATDETECT - Fix Nated Register"); fix_nated_register(); } else { if(is_first_hop()){ xlog("L_INFO", "NATDETECT - Set Contact Alias"); set_contact_alias(); } } xlog("L_INFO", "NATDETECT - Set FLT_NATS" + FLT_NATS); setflag(FLT_NATS); } #!endif xlog("L_INFO", "NATDETECT - NAT Detect set FLT_NTS = " + FLT_NATS); return; } # Handle requests within SIP dialogs route[WITHINDLG] { xlog("L_INFO", "WITHINDLG - Entering"); if (!has_totag()) return; if (is_present_hf("Route") && $hdrc(Route)==1) { if (search_hf("Route", ".*EXTERNAL_IP_ADDR.*", "f")) { xlog("L_INFO", "WITHINDLG - Removing the route to self"); remove_hf("Route"); } } # sequential request within a dialog should # take the path determined by record-routing if (loose_route()) { route(DLGURI); if (is_method("BYE|CANCEL")) { setflag(FLT_ACC); # do accounting ... setflag(FLT_ACCFAILED); # ... even if the transaction fails } else if ( is_method("ACK") ) { # ACK is forwarded statelessy xlog("L_INFO", "WITHINDLG - Going to NATMANAGE"); route(NATMANAGE); } else if ( is_method("NOTIFY") ) { #Add Record-Route for in-dialog NOTIFY as per RFC 6665. record_route(); } if(is_method("BYE")) xlog("L_INFO", "WITHINDLG - BYE message from $rU"); route(RELAY); exit; } if ( is_method("ACK|BYE|INVITE|UPDATE") ) { if ( t_check_trans() ) { # no loose-route, but stateful ACK; # must be an ACK after a 487 # or e.g. 404 from upstream server route(RELAY); exit; } else { # ACK without matching transaction. Try to route anyway - being optimistic # since it has at least a To Tag route(RELAY); exit; } } sl_send_reply("404","Not here"); xlog("L_INFO", "WITHINDLG - Finishing WITHINDLG"); exit; } # URI update for dialog requests route[DLGURI] { xlog("L_INFO", "WITHINDLG - Entering DLGURI"); #!ifdef WITH_NAT if(!isdsturiset()) { xlog("L_INFO", "WITHINDLG - Handle ruri ALIAS"); handle_ruri_alias(); } #!endif return; } # Routing to foreign domains ---> NOT USED route[SIPOUT] { xlog("L_INFO", "WITHINDLG - Entering SIPOUT"); if (uri==myself){ xlog("L_INFO", "WITHINDLG - URI is MySelf!"); return; } append_hf("P-hint: outbound\r\n"); xlog("L_INFO", "WITHINDLG - Finishing SIPOUT"); route(RELAY); exit; } # Wrapper for relaying requests route[RELAY] { xlog("L_INFO", " ******** RELAY *******"); xlog("L_INFO", "RELAY - $si $su $ru"); # enable additional event routes for forwarded requests # - serial forking, RTP relaying handling, a.s.o. if (is_method("INVITE|BYE|CANCEL|SUBSCRIBE|UPDATE")) { if(!t_is_set("branch_route")) { xlog("L_INFO", "RELAY - branch_route NOT SET!"); t_on_branch("MANAGE_BRANCH"); } } xlog("L_INFO", "RELAY - checking method"); if (is_method("INVITE|SUBSCRIBE|UPDATE")) { xlog("L_INFO", "RELAY - is INVITE|SUBSCRIBE|UPDATE"); if(!t_is_set("onreply_route")) { xlog("L_INFO", "RELAY - onreply_route NOT SET!"); t_on_reply("ON_REPLY"); # MANAGE_REPLY"); } } if (is_method("INVITE")) { xlog("L_INFO", "RELAY - is INVITE"); t_on_failure("FAILED_RELAY"); if(!t_is_set("failure_route")) { xlog("L_INFO", "RELAY - failure_route NOT SET!"); t_on_failure("MANAGE_FAILURE"); } } if (!t_relay()) { xlog("L_INFO", "RELAY - t_relay returns FALSE"); route("MANAGE_FAILURE"); #sl_reply_error(); } xlog("L_INFO", "RELAY - exiting"); exit; } failure_route[FAILED_RELAY] { xlog("L_INFO", "FAILED_RELAY - Entering"); if (t_check_status("[4-5][0-9][0-9]")){ xlog("L_INFO", "FAILED_RELAY - Could not reach destination endpoint!"); if (rtjson_next_route()) { xlog("L_INFO", "MANAGE_FAILURE - Getting next route"); t_on_branch("MANAGE_BRANCH"); t_on_failure("MANAGE_FAILURE"); route(RELAY); } } } route[NATMANAGE] { xlog("L_INFO", "NATMANAGE - Entering"); #!ifdef WITH_NAT if (is_request()) { if(has_totag()) { xlog("L_INFO", "NATMANAGE - nat=yes --- Setting FLB_NATB"); setbflag(FLB_NATB); } } if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB) )) { xlog("L_INFO", "NATMANAGE - NO FLT_NATS/B Set!!! Getting out of NATMANAGE"); return; } if (is_request()) { xlog("L_INFO", "NATMANAGE - is_request - $rm from $si"); if (!has_totag()) { if(t_is_branch_route()) { xlog("L_INFO", "NATMANAGE - adding nat=yes"); add_rr_param(";nat=yes"); } } } if (is_reply()) { xlog("L_INFO", "NATMANAGE - is_reply - $rm from $si"); if(isbflagset(FLB_NATB)) { if(is_first_hop()) { xlog("L_INFO", "NATMANAGE - Set Contact Alias"); set_contact_alias(); } } } #!endif return; } # Manage failure routing cases route[MANAGE_FAILURE] { xlog("L_INFO", "MANAGE_FAILURE - Entering "); route(NATMANAGE); xlog("L_INFO", "MANAGE_FAILURE - t_is_canceled"); if (t_is_canceled()) exit; #!ifdef WITH_BLOCK3XX # block call redirect based on 3xx replies. if (t_check_status("3[0-9][0-9]")) { xlog("L_INFO", "MANAGE_FAILURE - SIP 3XX returned!!"); t_reply("404","Not found"); exit; } #!endif #!ifdef WITH_BLOCK401407 # block call redirect based on 401, 407 replies. if (t_check_status("401|407")) { xlog("L_INFO", "MANAGE_FAILURE - SIP 401|407 returned!!"); t_reply("404","Not found"); exit; } #!endif if (t_check_status("503")){ xlog("L_INFO", "MANAGE_FAILURE - SIP 503 returned : no destination available"); t_reply("503", "Destination not available"); exit; } if (rtjson_next_route()) { xlog("L_INFO", "MANAGE_FAILURE - Getting next route!!"); t_on_branch("MANAGE_BRANCH"); t_on_failure("MANAGE_FAILURE"); route(RELAY); exit; } } # Manage outgoing branches branch_route[MANAGE_BRANCH] { xlog("L_INFO","MANAGE_BRANCH - New branch [$T_branch_idx] to $ru\n"); xlog("L_INFO", "MANAGE_BRANCH - branch_route MANAGE_BRANCH 1 "); rtjson_update_branch(); route(NATMANAGE); } Any help would be greatly appreciated. Thanks in advance. Sérgio Charrua

2 3

Kamailio v5.8.0 Released - new major version is out
by Daniel-Constantin Mierla 07 Mar '24

07 Mar '24

Kamailio v5.8.0 is out – it comes with 4 new modules and a large set of improvements touching again more than 50 existing modules. You can read a bit more detailed release notes at: * https://www.kamailio.org/w/kamailio-v5-8-0-release-notes/ Many thanks to all developers and community members that made possible this release. v5.8.0 brings more flexibility and optimizations across many existing components and modules, new parameters, functions, variables and transformations. Enjoy Kamailio v5.8.0! Thank you for flying Kamailio! Daniel -- Daniel-Constantin Mierla (@ asipto.com) twitter.com/miconda -- linkedin.com/in/miconda Kamailio Consultancy, Training and Development Services -- asipto.com Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com

1 0

Using uac_replace_to when forwarding call to another endpoint
by Marrold 07 Mar '24

07 Mar '24

Hi all, I am using uac_replace_to to replace the TO header on requests. I understand it can only be called once per message and the recommendation is to store the updated value in a pvar and apply it in the branch route. However in my scenario I wish to first try one endpoint and then if it gets a 4XX response forward it to another UAC, and update the TO accordingly. Currently trying to call uac_replace_to twice shows an error and corrupts the TO header. Is there a work around for this? Thanks again Matthew

3 3

Roadmap to next major Kamailio release series v5.8.x
by Daniel-Constantin Mierla 07 Mar '24

07 Mar '24

Hello, discussed a bit during the online Kamailio devel meeting, it is time to set the milestones towards the next major Kamailio release series v5.8.x. If no other suggestions that suit more developers, I would propose to freeze by end of this month or early February, then test for about 4 weeks as usual and release by end of February or during March. If anyone wants to add new features/modules, they have to be published till freezing date, either pushed in the git repository or proposed as pull request. Cheers, Daniel -- Daniel-Constantin Mierla (@ asipto.com) twitter.com/miconda -- linkedin.com/in/miconda Kamailio Consultancy, Training and Development Services -- asipto.com Kamailio Advanced Training, February 20-22, 2024 -- asipto.com Kamailio World Conference, April 18-19, 2024, Berlin -- kamailioworld.com

3 12

rtimer intermittent failures
by Marrold 06 Mar '24

06 Mar '24

Hi all, I am using Kamailio 5.7.4 on a Debian 12 machine, with a Python Kemi based config. I am seeing some intermittent failures when accessing an instance variable within a function called by rtimer. I'm using the rtimer module with the following parameters: modparam("rtimer", "timer", "name=hello;interval=5;mode=0;") modparam("rtimer", "exec", "timer=hello;route=ksr_route_hello") I initialise the kamailio class, and instance variable like this: class kamailio: def __init__(self): self.hello = "hi" Within the class I have the following route function: def ksr_route_hello(self, msg, evname): KSR.info("Running ksr_route_hello\n") KSR.info(f"Hello? {self.hello}\n") Then in the logs I see it sometimes works, and sometimes fails: 9(15) INFO: <core> [core/kemi.c:106]: sr_kemi_core_info(): Running ksr_route_hello 9(15) INFO: <core> [core/kemi.c:106]: sr_kemi_core_info(): Hello? hi 9(15) INFO: <core> [core/kemi.c:106]: sr_kemi_core_info(): Running ksr_route_hello 9(15) ERROR: app_python3 [python_support.c:167]: python_handle_exception(): apy_exec: ksr_route_hello(rtimer): Unhandled exception in the Python code: TypeError: 'NoneType' object cannot be interpreted as an integer The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/etc/kamailio/kamailio.py", line 1007, in ksr_route_hello KSR.info("Running ksr_route_hello\n") SystemError: <built-in function info> returned a result with an exception set Does anyone know where I'm going wrong? Thanks Matthew

2 2

Question for RFC junkies / kamailio modifying message bodies
by Valentin Christoph 06 Mar '24

06 Mar '24

Hi all, it might be a minor issue, or it might not be an issue at all, but I stumbled over following statements in RFC 3261: Chapter 16.6 Request Forwarding (of a proxy) 1. Copy request The proxy starts with a copy of the received request. The copy MUST initially contain all of the header fields from the received request. Fields not detailed in the processing described below MUST NOT be removed. The copy SHOULD maintain the ordering of the header fields as in the received request. The proxy MUST NOT reorder field values with a common field name (See Section 7.3.1<https://www.rfc-editor.org/rfc/rfc3261.html#section-7.3.1>). The proxy MUST NOT add to, modify, or remove the message body. An actual implementation need not perform a copy; the primary requirement is that the processing for each next hop begin with the same request. Chapter 16.7 Response Processing (at a proxy) 9. Forward response After performing the processing described in steps "Aggregate Authorization Header Field Values" through "Record-Route", the proxy MAY perform any feature specific manipulations on the selected response. The proxy MUST NOT add to, modify, or remove the message body. Unless otherwise specified, the proxy MUST NOT remove any header field values other than the Via header field value discussed in Section 16.7<https://www.rfc-editor.org/rfc/rfc3261.html#section-16.7> Item 3. In particular, the proxy MUST NOT remove any "received" parameter On the other hand, everywhere in the Internet (starting with stackoverflow), you can read it is OK, if a SIP proxy modifies a body, and also kamailio allows it. Might be a question for the coffee break. All the best Christoph

3 2

Kamailio closing tcp connection on downstream responses
by Kjartan S 06 Mar '24

06 Mar '24

Trying to setup Kamailio with MS Teams Direct Routing. I am familiar with the integration steps required by Microsoft (using contact header as FQDN, certified CA for certificate) aswell as the famous guide; https://skalatan.de/en/blog/kamailio-sbc-teams + https://learn.microsoft.com/en-us/microsoftteams/direct-routing-protocols-s… Sending any SIP requests (Invite, ACK, BYE) toward MS is working fine (with provisional response received in Kamailio) - so there is obviously a working connection between Kamailio <-> MS Direct Routing environment. HOWEVER, once Kamailio is forwarding SIP responses to MS (provisional responses/200 OK received from UAS), then Kamailio is closing the TCP connection. Please see attached logs below. Any idea why Kamailio is closing the connection when trying to send provisional responses to MS? - Using t_realy on original invite from MS - tcp_reuse_port=yes, tcp_rd_buf_size = 16384, tcp_connection_lifetime=3605, children=8, socket_workers=4 - No override rules in firewall - OS; debian:11.7 - Notice that TLS connection is made on port :26627 - however, MS sends port :5061 in VIA header (on first Invite). This seems to me to be a conflict in ports. https://www.kamailio.org/wiki/cookbooks/5.4.x/core#reply_route "There is no network route that can be enforced for a SIP reply - it is sent based on Via header, according to SIP RFC3261" ----- Handshake complete for 52.114.76.76:26627 19(43) DEBUG: tls [tls_domain.c:818]: sr_ssl_ctx_info_callback(): SSL handshake done 19(43) DEBUG: tls [tls_server.c:473]: tls_accept(): TLS accept successful 19(43) DEBUG: tls [tls_server.c:476]: tls_accept(): tls_accept: new connection from 52.114.76.76:26627 using TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 19(43) DEBUG: tls [tls_server.c:480]: tls_accept(): tls_accept: local socket: 10.129.0.91:5061 19(43) DEBUG: tls [tls_server.c:420]: tls_dump_cert_info(): tls_accept: client certificate subject:/C=US/ST=WA/L=Redmond/O=Microsoft Corporation/CN=sip.pstnhub.microsoft.com 19(43) DEBUG: tls [tls_server.c:424]: tls_dump_cert_info(): tls_accept: client certificate issuer:/C=US/O=Microsoft Corporation/CN=Microsoft Azure RSA TLS Issuing CA 04 ----- Kamailio trying to forward SIP response "183" to MS (response received from UAS). Kamailio finds active connection by ID 13 / 0x7f4ecad0be08 20(44) DEBUG: {2 1 INVITE e926eb82d1a25bdc9ba03048cdbc5c77} <core> [core/tcp_main.c:1722]: _tcpconn_find(): found connection by id: 13 20(44) DEBUG: {2 1 INVITE e926eb82d1a25bdc9ba03048cdbc5c77} <core> [core/tcp_main.c:2627]: tcpconn_send_put(): tcp connection found (0x7f4ecad0be08), acquiring fd 20(44) DEBUG: {2 1 INVITE e926eb82d1a25bdc9ba03048cdbc5c77} <core> [core/tcp_main.c:2637]: tcpconn_send_put(): c=0x7f4ecad0be08, n=16 23(47) DEBUG: <core> [core/tcp_main.c:3982]: handle_ser_child(): read response= 7f4ecad0be08, 2, fd -1 from 20 (44) 20(44) DEBUG: {2 1 INVITE e926eb82d1a25bdc9ba03048cdbc5c77} <core> [core/tcp_main.c:2665]: tcpconn_send_put(): after receive_fd: c= 0x7f4ecad0be08 n=8 fd=12 20(44) DEBUG: {2 1 INVITE e926eb82d1a25bdc9ba03048cdbc5c77} <core> [core/tcp_main.c:2842]: tcpconn_do_send(): sending... 20(44) DEBUG: {2 1 INVITE e926eb82d1a25bdc9ba03048cdbc5c77} <core> [core/tcp_main.c:2878]: tcpconn_do_send(): after real write: c= 0x7f4ecad0be08 n=1191 fd=12 ----- Kamailio immediately closes the connection due to EOF. 19(43) DEBUG: <core> [core/tcp_read.c:280]: tcp_read_data(): EOF on connection 0x7f4ecad0be08 (state: 0, flags: 4018) - FD 10, bytes 0, rd-flags 10000 ([52.114.76.76]:26627 -> [52.114.76.76]:5061)19(43) DEBUG: <core> [core/tcp_read.c:1544]: tcp_read_req(): EOF 19(43) DEBUG: <core> [core/io_wait.h:597]: io_watch_del(): DBG: io_watch_del (0x555b3cf20260, 10, -1, 0x10) fd_no=2 called 19(43) DEBUG: <core> [core/tcp_read.c:1927]: handle_io(): removing from list 0x7f4ecad0be08 id 13 fd 10, state 2, flags 4018, main fd 57, refcnt 2 ([52.114.76.76]:26627 -> [52.114.76.76]:5061) 19(43) DEBUG: <core> [core/tcp_read.c:1702]: release_tcpconn(): releasing con 0x7f4ecad0be08, state -1, fd=10, id=13 ([52.114.76.76]:26627 -> [52.114.76.76]:5061)

1 0

RADIUS ACC - Interim Updates
by duarterocha91＠gmail.com 06 Mar '24

06 Mar '24

Hello all, I can't seem to find a way to make interim accounting requests for RADIUS. Can you help me with this? I can't find any native way for doing this. I've thought of getting a custom timer for each dialog and run a event route similar do dialog:start or dialog:end. Is that possible? Cheers, Duarte Rocha

2 2

Add XML to INVITE
by David Villasmil 06 Mar '24

06 Mar '24

Hello guys, I'm trying to add an xml with a boundary to an outgoing INVITE. But if i do: set_body_multipart("$rb", "application/sdp", "delimiter"); msg_apply_changes(); append_body_part("$var(something)", "application/pidf+xml"); msg_apply_changes(); but kamailio adds the SDP, but NOT the second $var(something). If i switch them and add firs the var, and then the SDP. kamailio adds the contents of $var(something) but NOT the SDP.... point is it doesn't add the second append Thanks!!! Regards, David Villasmil email: david.villasmil.work(a)gmail.com phone: +34669448337

2 3

dispatcher - sip options per gw
by marek 05 Mar '24

05 Mar '24

hi, i have kamailio gw (5.6.x) for voxbone. dispatcher module voxbone has separated inbound/outboud and prohibit sip options to "inbound" IP #traffic from voxbone 20 sip:81.201.82.45:5060;transport=udp 1 0 duid=abc;socket=udp:x.x.x.x:5060 #traffic TO voxbone 30 sip:81.201.89.110:5060;transport=udp 0 0 duid=abc;socket=udp:x.x.x.x:5060 is it possible send sip options per GW with dispatcher module? i tried flag "1 (bit at index 0 - 1 <<0) - inactive destination" https://www.kamailio.org/docs/modules/devel/modules/dispatcher.html#idm1059 Marek

2 2

direct media between UACs
by Sergio Charrua 05 Mar '24

05 Mar '24

Hi all! got a weird behavior that I cannot understand the reason for... In our LAB environment, we have 2 Asterisk instances (version 13.38.3 and chan_sip) and 1 Kamailio 5.7 in between. All servers are in the same network, so, there is no NAT involved. No RTPEngine neither. Network is 10.20.0.0/24 and Asterisk #1 has IP .1 Asterisk #2 has IP .3 and Kamailio has IP .5 The Asterisk servers are used only for testing, nothing serious. However, Kamailio is setup to use RTJson requesting routes to a Routing Server on the same network. And it works fine. Both Asterisk servers have the same dialplan, which only Answers the call and plays MOH on both ends so that RTP audio streams both ways. When making a call on Asterisk Server #1 via command line to go directly to Asterisk Server #2 without using Kamailio (CLI> channel originate SIP/ 123(a)10.20.0.*3* application MusicOnHold() ) the Asterisk #2 receives the call, answers and plays MOH too and I can see RTP streams coming from both ends correctly. However, if I use Kamailio to proxy the call generated from Asterisk #1 to Asterisk #2, using similar command line instruction (CLI> channel originate SIP/123(a)10.20.0.5 application MusicOnHold() ), the call is indeed received on Kamailio who then sends it to Asterisk #2, who answers the call and plays MOH, *but* despite the audio stream being sent to Asterisk #1 it is never received, however audio from Asterisk #1 is received by Asterisk #2, which configures a typical One Way Audio issue due to NAT. This is where it gets strange, because there is no NAT, SDP on INVITE and SIP 200 messages seem OK, as far as I understand it. Also, Asterisk servers have SIP configuration with directmedia enabled and NAT disabled to make sure that media is direct. But I have also tried with directmedia disabled and NAT enabled and get identical results. I am most probably missing some tiny detail, but I have no clue.... and I bet it is simple and stupid.... Could another pair of eyes help me with this? What is wrong? Do I really need RTPEngine even when the network has no NAT? I am sure it would work that way, but it doesn't make sense... Here are some screenshots: Call Scenario #1 - direct call from Asterisk #1 to Asterisk #2 without Kamailio in between: Invite from Asterisk #1 to Asterisk #2 with direct media between both ends: [image: image.png] Replies from Asterisk #2 to Asterisk #1 with direct media between both ends: [image: image.png] Call Scenario #2 - call from Asterisk #1 using Kamailio to relay call to Asterisk #2, with one way audio Invite from Asterisk #1 to Asterisk #2 via Kamailio with SDP details: [image: image.png] Invite from Kamailio relayed to Asterisk #2 with SDP details from Asterisk #1 identical to above: [image: image.png] Reply from Asterisk #2 to Kamailio with SDP details: [image: image.png] Reply from Kamailio to Asterisk #2 with SDP details from Asterisk #2 identical to above: [image: image.png] As we can see, SDP details seem OK, but if I check call flow on Asterisk #1, I can only find 1 RTP channel with audio coming from Asterisk #2 [image: image.png] and the same on Asterisk #2 : [image: image.png] My Kamailio.cfg : #!KAMAILIO # # config file for SIPProxy # - load balancing of VoIP calls # - no TPC listening # # Kamailio (OpenSER) SIP Server v3.2 # - web: http://www.kamailio.org # - git: http://sip-router.org # # # Refer to the Core CookBook at http://www.kamailio.org/dokuwiki/doku.php # for an explanation of possible statements, functions and parameters. # # Several features can be enabled using '#!define WITH_FEATURE' directives: # # *** To run in debug mode: # - define WITH_DEBUG # #!define WITH_DEBUG ###!define WITH_NAT #!define WITH_PSTN /* enables Accounting Log functions */ #!define FLT_ACC 1 /* enable Accounting of missed or failed calls */ #!define FLT_ACCMISSED 2 #!define FLT_ACCFAILED 3 /* defines DB connection string */ #!ifndef DBURL #!define DBURL "mysql://kamailio:kamailio@10.20.0.1:3306/kamailio" #!endif # - the value for 'use_domain' parameters #!define MULTIDOMAIN 1 ####### Global Parameters ######### #!ifdef WITH_DEBUG debug=4 log_stderror=no #!else debug=2 log_stderror=no #!endif #!define FLT_DISPATCH_SETID 1 #!define FLT_FS 10 #!define FLT_NATS 5 #!define FLB_NATB 6 #!define FLB_NATSIPPING 7 #!define FLT_SRC_ALLOWED 8 #!define FLT_DST_INTERNAL_IP 9 #!define FLT_SRC_INTERNAL_IP 10 #!substdef "!INTERNAL_IP_NET!10.20.0.0/24!g" #!substdef "!INTERNAL_IP_ADDR!10.20.0.2!g" #!substdef "!EXTERNAL_IP_ADDR!10.20.0.2!g" #!ifndef HTTP_ASYNC_CLIENT_WORKERS #!define HTTP_ASYNC_CLIENT_WORKERS 8 #!endif /* add API http timeout */ #!define HTTP_API_TIMEOUT 5000 #!define HTTP_API_ROUTING_ENDPOINT "http://10.246.212.40:7778/get_route" /* DMQ SIP message sharing */ #!define DMQ_PORT 5062 #!define DMQ_LISTEN "sip:10.20.0.2:5062" #!define DMQ_SERVER_ADDRESS "sip:10.20.0.2:5062" #!define DMQ_NOTIFICATION_ADDRESS "sip:10.20.0.4:5062" memdbg=5 memlog=5 log_facility=LOG_LOCAL0 log_prefix="{$mt $hdr(CSeq) $ci} " fork=yes children=8 /* comment the next line to enable TCP - all trunks are UDP only */ disable_tcp=yes /* uncomment the next line to disable the auto discovery of local aliases based on revers DNS on IPs (default on) */ auto_aliases=no port=5060 /* uncomment and configure the following line if you want Kamailio to bind on a specific interface/port/proto (default bind on all available) */ listen=udp:10.20.0.5:5060 advertise 10.20.0.5:5060 listen=tcp:10.20.0.5:5060 advertise 10.20.0.5:5060 listen=udp:10.20.0.2:5062 advertised_address="10.20.0.5"; sip_warning=no; use_dns_failover = on; ####### Modules Section ######## #set module path mpath="/usr/local/lib64/kamailio/modules/" loadmodule "db_mysql.so" loadmodule "jsonrpcs.so" loadmodule "kex.so" loadmodule "tm.so" loadmodule "tmx.so" loadmodule "sl.so" loadmodule "rr.so" loadmodule "pv.so" loadmodule "maxfwd.so" loadmodule "textops.so" loadmodule "siputils.so" loadmodule "xlog.so" loadmodule "sanity.so" loadmodule "ctl.so" loadmodule "acc.so" loadmodule "usrloc.so" loadmodule "nathelper.so" #loadmodule "rtimer.so" #loadmodule "sqlops.so" # --- CPS Limiter # --- end of CPS Limiter loadmodule "ipops.so" loadmodule "textopsx.so" loadmodule "sdpops.so" loadmodule "http_async_client.so" loadmodule "rtjson.so" loadmodule "jansson.so" loadmodule "dmq.so" loadmodule "dmq_usrloc.so" loadmodule "htable.so" loadmodule "dialog.so" #!ifdef WITH_DEBUG loadmodule "debugger.so" #!endif #!ifdef WITH_DEBUG # ----- debugger params ----- modparam("debugger", "log_level_name", "exec") #!endif # ----------------- setting module-specific parameters --------------- # ----- jsonrpcs params ----- modparam("jsonrpcs", "fifo_name", "/var/run/kamailio/kamailio_rpc.fifo") modparam("jsonrpcs", "pretty_format", 1) # ----- rr params ----- modparam("jsonrpcs", "fifo_name", "/var/run/kamailio/kamailio_rpc.fifo") modparam("jsonrpcs", "pretty_format", 1) # ----- rr params ----- # add value to ;lr param to cope with most of the UAs modparam("rr", "enable_full_lr", 1) # do not append from tag to the RR (no need for this script) modparam("rr", "append_fromtag", 0) # ----- acc params ----- modparam("acc", "failed_transaction_flag", 3) modparam("acc", "log_extra","src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si") # ----- acc params ----- /* what special events should be accounted ? */ modparam("acc", "early_media", 0) modparam("acc", "report_ack", 0) modparam("acc", "report_cancels", 0) /* by default we do not adjust the direct of the sequential requests. if you enable this parameter, be sure the enable "append_fromtag" in "rr" module */ modparam("acc", "detect_direction", 0) /* account triggers (flags) */ modparam("acc", "log_flag", FLT_ACC) modparam("acc", "log_missed_flag", FLT_ACCMISSED) modparam("acc", "log_extra","src_user=$fU;src_domain=$fd;src_ip=$si;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") modparam("acc", "failed_transaction_flag", FLT_ACCFAILED) /* enhanced DB accounting */ modparam("acc", "db_flag", FLT_ACC) modparam("acc", "db_missed_flag", FLT_ACCMISSED) modparam("acc", "db_url", DBURL) modparam("acc", "db_extra","src_user=$fU;src_domain=$fd;src_ip=$si;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") //;calltype=$avp(calltype)") # ----- tm params ----- # ----- the TM module enables stateful processing of SIP requests modparam("tm", "fr_timer", 5000) modparam("tm", "fr_inv_timer", 60000) modparam("tm", "remap_503_500", 0) # ----- usrloc params ----- /* enable DB persistency for location entries */ modparam("usrloc", "db_url", DBURL) modparam("usrloc", "db_mode", 2) modparam("usrloc", "use_domain", MULTIDOMAIN) # params needed for NAT traversal in other modules modparam("usrloc", "nat_bflag", FLB_NATB) # ----- nathelper params ----- modparam("nathelper", "received_avp", "$avp(s:rcv)") modparam("nathelper", "natping_interval", 30) modparam("nathelper", "ping_nated_only", 1) modparam("nathelper", "sipping_bflag", FLB_NATSIPPING) modparam("nathelper", "sipping_from", "sip:ping@kamailio.org") #modparam("rtimer", "timer", "name=cdr;interval=300;mode=1;") #modparam("rtimer", "exec", "timer=cdr;route=CDRS") #modparam("sqlops", "sqlcon", "ca=>mysql:// kamailio:kamailiorw@10.19.139.113:3306/kamailio") #modparam("dmq", "server_socket", DMQ_SERVER_SOCKET ) modparam("dmq", "server_address", DMQ_SERVER_ADDRESS ) modparam("dmq", "notification_address", DMQ_NOTIFICATION_ADDRESS ) modparam("dmq", "multi_notify", 1) modparam("dmq", "num_workers", 4) modparam("dmq", "ping_interval", 60) modparam("dmq_usrloc", "enable", 1) # -- CPS Limiter modparam("htable", "htable", "rhs=>size=32;initval=0;autoexpire=10;") modparam("htable", "htable", "rhm=>size=32;initval=0;autoexpire=120;") modparam("htable", "enable_dmq", 1) modparam("htable", "dmq_init_sync", 1) modparam("dialog", "profiles_with_value", "concurrent_calls") modparam("dialog", "enable_dmq", 1) # ----- http_async_client params ----- modparam("http_async_client", "workers", HTTP_ASYNC_CLIENT_WORKERS) modparam("http_async_client", "connection_timeout", 2000) ####### Routing Logic ######## # main request routing logic route { if (is_method("KDMQ") && $Rp == 5062) { dmq_handle_message(); } xlog("L_INFO"," ********** Route START ***********"); # log the basic info regarding this call xlog("L_INFO","start|\n"); xlog("L_INFO","===================================================\n"); xlog("L_INFO","New SIP message $rm with call-ID $ci \n"); xlog("L_INFO","---------------------------------------------------\n"); xlog("L_INFO"," received $pr request $rm $ou\n"); xlog("L_INFO"," source $si:$sp\n"); xlog("L_INFO"," from $fu\n"); xlog("L_INFO"," to $tu\n"); xlog("L_INFO","---------------------------------------------------\n"); xlog("L_INFO","---------------------------------------------------\n"); # OPTIONS requests without a username in the Request-URI but one # of our domains or IPs are addressed to the proxy itself and # can be answered statelessly. if (is_method("OPTIONS")) { sl_send_reply("200","OK"); exit; } if ($fU=="ping") { sl_send_reply("200","OK"); exit; } # extract original source ip / port from X-forwarded-For header route(HANDLE_X_FORWARDED_FOR); # per request initial checks route(REQINIT); # NAT detection route(NATDETECT); # handle requests within SIP dialogs ### only initial requests (no To tag) # CANCEL processing if (is_method("CANCEL")) { if (t_check_trans()){ route(RELAY); } exit; } # handle retransmissions if (!is_method("ACK")) { if(t_precheck_trans()) { t_check_trans(); xlog("L_INFO", "ROUTE - Exiting after Retransmission check - method $rm"); exit; } t_check_trans(); } route(WITHINDLG); # record routing for dialog forming requests (in case they are routed) # - remove preloaded route headers xlog("L_INFO", "ROUTE - Removing Headers"); remove_hf("Route"); if (is_method("INVITE|SUBSCRIBE")){ t_on_failure("MANAGE_FAILURE"); xlog("L_INFO", "ROUTE - Recording Route"); record_route(); if (is_method("INVITE") && is_request()) { if (has_body("application/sdp")) { xlog("L_INFO", "ROUTE - goiing to t_on_reply[ON_REPLY]\n"); t_on_reply("ON_REPLY"); } } } if ($rU==$null) { # request with no Username in RURI sl_send_reply("484","ROUTE - Address Incomplete"); exit; } route(TOCARRIER); xlog("L_INFO", " ********** Route END *************"); } # extract original source ip / port from X-forwarded-For header route[HANDLE_X_FORWARDED_FOR] { if (is_present_hf("X-Forwarded-For")) { $var(source_ip) = $(hdr(X-Forwarded-For){s.select,0,:}); $var(source_port) = $(hdr(X-Forwarded-For){s.select,1,:}); } else { $var(source_ip) = $si; $var(source_port) = $sp; } $var(to_number) = $rU; } route[RELAY_API] { xlog("L_INFO","RELAY_API - from_ip $var(source_ip):$var(source_port) from_number $fU to_number $ru"); $http_req(all) = $null; $http_req(suspend) = 1; $http_req(timeout) = HTTP_API_TIMEOUT; $http_req(method) = "POST"; $http_req(hdr) = "Content-Type: application/json"; jansson_set("string","from_ip",$var(source_ip), "$var(http_routing_query)"); jansson_set("string","from_port",$var(source_port), "$var(http_routing_query)"); jansson_set("string","from_number",$fU, "$var(http_routing_query)"); jansson_set("string","to_number",$var(to_number) , "$var(http_routing_query)"); xlog("L_INFO","RELAY_API - API ASYNC ROUTING REQUEST: $var(http_routing_query)\n"); $http_req(body) = $var(http_routing_query); t_newtran(); http_async_query(HTTP_API_ROUTING_ENDPOINT, "RELAY_API_RESPONSE"); } # Relay request using the API (response) route[RELAY_API_RESPONSE] { if ($http_ok==1 && $http_rs==200) { xlog("L_INFO","RELAY_API_RESPONSE - RESPONSE: $http_rb\n"); if (jansson_get("rtjson", $http_rb, "$var(rtjson)")) { xlog("L_INFO","RELAY_API_RESPONSE - $var(rtjson)"); rtjson_init_routes("$var(rtjson)"); rtjson_push_routes(); # relay the message t_on_branch("MANAGE_BRANCH"); t_on_failure("MANAGE_FAILURE"); route(RELAY); return; } } send_reply(500, "API Not Available - http response = $http_rs $http_ok"); exit; } onreply_route[ON_REPLY] { xlog("L_INFO", "ON_REPLY - In onreply_route[ON_REPLY] $rs"); # on reply if (t_check_status("183|180|200")) { xlog("L_INFO", "ON_REPLY - Fixing Contacts"); # subst_hf("Contact","/@.*:/@EXTERNAL_IP_ADDR:/","a"); //subst_hf("Record-Route","/INTERNAL_IP_ADDR/EXTERNAL_IP_ADDR/","f"); } if (has_body("application/sdp")){ if (sdp_remove_line_by_prefix("a=maxptime")){ xlog("L_INFO", "ON_REPLY - remove maxptime "); msg_apply_changes(); } else{ xlog("L_INFO", "ON_REPLY - did not removed maxptime "); } } if (t_check_status("408")) { xlog("L_INFO", "ROUTE - Handling 408 Timeout\n"); } } route[TOCARRIER]{ #using rtjson, unsomment following line route(RELAY_API); } # Per SIP request initial checks route[REQINIT] { xlog("L_INFO", "REQINIT - Starting"); if (!mf_process_maxfwd_header("10")) { xlog("L_INFO", "REQINIT - 483 - Too Many Hops"); sl_send_reply("483","Too Many Hops"); exit; } if(!sanity_check("1511", "7")) { xlog("L_INFO","REQINIT - Sanity Check -> Malformed SIP message from $si:$sp\n"); exit; } } # Caller NAT detection route[NATDETECT] { xlog("L_INFO", "NATDETECT - Entering"); #!ifdef WITH_NAT force_rport(); if (nat_uac_test("19")) { if (is_method("REGISTER")) { xlog("L_INFO", "NATDETECT - Fix Nated Register"); fix_nated_register(); } else { if(is_first_hop()){ xlog("L_INFO", "NATDETECT - Set Contact Alias"); set_contact_alias(); } } xlog("L_INFO", "NATDETECT - Set FLT_NATS" + FLT_NATS); setflag(FLT_NATS); } #!endif xlog("L_INFO", "NATDETECT - NAT Detect set FLT_NTS = " + FLT_NATS); return; } # Handle requests within SIP dialogs route[WITHINDLG] { xlog("L_INFO", "WITHINDLG - Entering"); if (!has_totag()) return; if (is_present_hf("Route") && $hdrc(Route)==1) { if (search_hf("Route", ".*EXTERNAL_IP_ADDR.*", "f")) { xlog("L_INFO", "WITHINDLG - Removing the route to self"); remove_hf("Route"); } } # sequential request within a dialog should # take the path determined by record-routing if (loose_route()) { route(DLGURI); if (is_method("BYE|CANCEL")) { setflag(FLT_ACC); # do accounting ... setflag(FLT_ACCFAILED); # ... even if the transaction fails } else if ( is_method("ACK") ) { # ACK is forwarded statelessy xlog("L_INFO", "WITHINDLG - Going to NATMANAGE"); route(NATMANAGE); } else if ( is_method("NOTIFY") ) { #Add Record-Route for in-dialog NOTIFY as per RFC 6665. record_route(); } if(is_method("BYE")) xlog("L_INFO", "WITHINDLG - BYE message from $rU"); route(RELAY); exit; } if ( is_method("ACK|BYE|INVITE|UPDATE") ) { if ( t_check_trans() ) { # no loose-route, but stateful ACK; # must be an ACK after a 487 # or e.g. 404 from upstream server route(RELAY); exit; } else { # ACK without matching transaction. Try to route anyway - being optimistic # since it has at least a To Tag route(RELAY); exit; } } sl_send_reply("404","Not here"); xlog("L_INFO", "WITHINDLG - Finishing WITHINDLG"); exit; } # URI update for dialog requests route[DLGURI] { xlog("L_INFO", "WITHINDLG - Entering DLGURI"); #!ifdef WITH_NAT if(!isdsturiset()) { xlog("L_INFO", "WITHINDLG - Handle ruri ALIAS"); handle_ruri_alias(); } #!endif return; } # Routing to foreign domains ---> NOT USED route[SIPOUT] { xlog("L_INFO", "WITHINDLG - Entering SIPOUT"); if (uri==myself){ xlog("L_INFO", "WITHINDLG - URI is MySelf!"); return; } append_hf("P-hint: outbound\r\n"); xlog("L_INFO", "WITHINDLG - Finishing SIPOUT"); route(RELAY); exit; } # Wrapper for relaying requests route[RELAY] { xlog("L_INFO", " ******** RELAY *******"); xlog("L_INFO", "RELAY - $si $su $ru"); # enable additional event routes for forwarded requests # - serial forking, RTP relaying handling, a.s.o. if (is_method("INVITE|BYE|CANCEL|SUBSCRIBE|UPDATE")) { if(!t_is_set("branch_route")) { xlog("L_INFO", "RELAY - branch_route NOT SET!"); t_on_branch("MANAGE_BRANCH"); } } xlog("L_INFO", "RELAY - checking method"); if (is_method("INVITE|SUBSCRIBE|UPDATE")) { xlog("L_INFO", "RELAY - is INVITE|SUBSCRIBE|UPDATE"); if(!t_is_set("onreply_route")) { xlog("L_INFO", "RELAY - onreply_route NOT SET!"); t_on_reply("ON_REPLY"); # MANAGE_REPLY"); } } if (is_method("INVITE")) { xlog("L_INFO", "RELAY - is INVITE"); t_on_failure("FAILED_RELAY"); if(!t_is_set("failure_route")) { xlog("L_INFO", "RELAY - failure_route NOT SET!"); t_on_failure("MANAGE_FAILURE"); } } if (!t_relay()) { xlog("L_INFO", "RELAY - t_relay returns FALSE"); route("MANAGE_FAILURE"); #sl_reply_error(); } xlog("L_INFO", "RELAY - exiting"); exit; } failure_route[FAILED_RELAY] { xlog("L_INFO", "FAILED_RELAY - Entering"); if (t_check_status("[4-5][0-9][0-9]")){ xlog("L_INFO", "FAILED_RELAY - Could not reach destination endpoint!"); if (rtjson_next_route()) { xlog("L_INFO", "MANAGE_FAILURE - Getting next route"); t_on_branch("MANAGE_BRANCH"); t_on_failure("MANAGE_FAILURE"); route(RELAY); } } } route[NATMANAGE] { xlog("L_INFO", "NATMANAGE - Entering"); #!ifdef WITH_NAT if (is_request()) { if(has_totag()) { xlog("L_INFO", "NATMANAGE - nat=yes --- Setting FLB_NATB"); setbflag(FLB_NATB); } } if (!(isflagset(FLT_NATS) || isbflagset(FLB_NATB) )) { xlog("L_INFO", "NATMANAGE - NO FLT_NATS/B Set!!! Getting out of NATMANAGE"); return; } if (is_request()) { xlog("L_INFO", "NATMANAGE - is_request - $rm from $si"); if (!has_totag()) { if(t_is_branch_route()) { xlog("L_INFO", "NATMANAGE - adding nat=yes"); add_rr_param(";nat=yes"); } } } if (is_reply()) { xlog("L_INFO", "NATMANAGE - is_reply - $rm from $si"); if(isbflagset(FLB_NATB)) { if(is_first_hop()) { xlog("L_INFO", "NATMANAGE - Set Contact Alias"); set_contact_alias(); } } } #!endif return; } # Manage failure routing cases route[MANAGE_FAILURE] { xlog("L_INFO", "MANAGE_FAILURE - Entering "); route(NATMANAGE); xlog("L_INFO", "MANAGE_FAILURE - t_is_canceled"); if (t_is_canceled()) exit; #!ifdef WITH_BLOCK3XX # block call redirect based on 3xx replies. if (t_check_status("3[0-9][0-9]")) { xlog("L_INFO", "MANAGE_FAILURE - SIP 3XX returned!!"); t_reply("404","Not found"); exit; } #!endif #!ifdef WITH_BLOCK401407 # block call redirect based on 401, 407 replies. if (t_check_status("401|407")) { xlog("L_INFO", "MANAGE_FAILURE - SIP 401|407 returned!!"); t_reply("404","Not found"); exit; } #!endif if (t_check_status("503")){ xlog("L_INFO", "MANAGE_FAILURE - SIP 503 returned : no destination available"); t_reply("503", "Destination not available"); exit; } if (rtjson_next_route()) { xlog("L_INFO", "MANAGE_FAILURE - Getting next route!!"); t_on_branch("MANAGE_BRANCH"); t_on_failure("MANAGE_FAILURE"); route(RELAY); exit; } } # Manage outgoing branches branch_route[MANAGE_BRANCH] { xlog("L_INFO","MANAGE_BRANCH - New branch [$T_branch_idx] to $ru\n"); xlog("L_INFO", "MANAGE_BRANCH - branch_route MANAGE_BRANCH 1 "); rtjson_update_branch(); route(NATMANAGE); } Any help would be greatly appreciated. Thanks in advance. *Sérgio *

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Question syntax check / plausi check kamailio.cfg
by Valentin Christoph 04 Mar '24

04 Mar '24

Dear all, Is there any other possibility to (automatically) check the plausibility/syntax of an existing kamailio.cfg, besides kamailio -c -f kamailio.cfg ? Thanks, Christoph

3 2

DMQ module failure
by Sergio Charrua 01 Mar '24

01 Mar '24

Hi all! I'm testing the DMQ module, but having difficulties setting it up. [...] My kamailio.cfg is as follows : [...] listen=udp:0.0.0.0:5060 listen=tcp:0.0.0.0:5060 [...] modparam("dmq", "server_address", "sip:10.20.0.2:5062") #DMQ_SERVER_ADDRESS modparam("dmq", "notification_address", "sip:10.20.0.4:5062 ")#DMQ_NOTIFICATION_ADDRESS modparam("dmq", "multi_notify", 1) modparam("dmq", "num_workers", 4) modparam("dmq", "ping_interval", 15) modparam("dmq_usrloc", "enable", 1) If I check syntax (using -c parameter) all is ok. Once I start Kamailio, the following error appears on system log: INFO: dmq [dmq.c:164]: make_socket_str_from_uri(): unknown transport protocol - fall back to udp ERROR: dmq [dmq.c:241]: mod_init(): server_uri is not a socket the proxy is listening on ERROR: <core> [core/sr_module.c:1030]: init_mod(): Error while initializing module dmq (/usr/local/lib64/kamailio/modules/dmq.so) I have used UDP as well as SIP as protocols for Server Address and Notification Address, used port 5060 and 5062 (and others too), even added a new listen=udp:0.0.0.0:5062, as well as listen=tcp:0.0.0.0:5062 but the result is always the same. Using Kamailio 5.7.4 on RHEL 9 with SELINUX set to enforcing (if relevant). No firewall active. local IP address is 10.20.0.1 second kamailio node IP address is 10.20.0.4 Any ideas? At first sight, it seems to be all set as per documentation. I even found other configurations online, and apart from the IP address, all is similar. Thanks in advance, *Sérgio Charrua* *www.voip.pt <http://www.voip.pt/>*

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sr-users March 2024