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23 participants
37378 discussions

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/>*

2 2

Answer OPTIONS from an Asterisk
by Ludovic ELUECQUE 28 Feb '24

28 Feb '24

Hello, I've been using Kamailio to replace a Telcobridge ProSBC for several days now, but I've been stuck for a whole day on a simple concept My Kamaillio is connected to an Asterisk to which it redirects requests. However, this Asterisk sends OPTIONS requests in order to ping the phone. On the Kamailio side, I don't know how to respond to these requests. I've done tons of research but I can't find anything similar, maybe there's something very obvious I'm missing.... If I t_relay the message it never receives a reply via the phone's public ip/port. Thanks in advance if anyone could help me with this. Please apologize if it's a dumb thing. SIP OPTIONS: 2024/02/28 23:28:25.181663 100.66.138.5:5060 -> 100.66.138.7:5060 OPTIONS sip:110@100.66.138.7:5060 SIP/2.0 Via: SIP/2.0/UDP 100.66.138.5:5060 ;rport;branch=z9hG4bKPje213d53f-fd1d-47f2-b0f8-fd3a8bf5188c From: <sip:110@100.66.138.5>;tag=46e51407-77b0-47f1-af73-cd8bec95b179 To: <sip:110@100.66.138.7> Contact: <sip:110@100.66.138.5:5060> Call-ID: 74401738-d874-4c5c-a4b5-b74514361043 CSeq: 50224 OPTIONS Max-Forwards: 70 User-Agent: Asterisk Content-Length: 0 ============= kamailio.cfg #!KAMAILIO #!define WITH_MYSQL #!define WITH_AUTH #!define WITH_USRLOCDB #!define WITH_RTPENGINE # define WITH_ANTIFLOOD #!define WITH_WEBSOCKETS #!define WITH_TLS #!define WITH_NAT ... #!ifdef ACCDB_COMMENT ALTER TABLE acc ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT ''; ALTER TABLE acc ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT ''; ALTER TABLE acc ADD COLUMN src_ip varchar(64) NOT NULL default ''; ALTER TABLE acc ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT ''; ALTER TABLE acc ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT ''; ALTER TABLE acc ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT ''; ALTER TABLE missed_calls ADD COLUMN src_user VARCHAR(64) NOT NULL DEFAULT ''; ALTER TABLE missed_calls ADD COLUMN src_domain VARCHAR(128) NOT NULL DEFAULT ''; ALTER TABLE missed_calls ADD COLUMN src_ip varchar(64) NOT NULL default ''; ALTER TABLE missed_calls ADD COLUMN dst_ouser VARCHAR(64) NOT NULL DEFAULT ''; ALTER TABLE missed_calls ADD COLUMN dst_user VARCHAR(64) NOT NULL DEFAULT ''; ALTER TABLE missed_calls ADD COLUMN dst_domain VARCHAR(128) NOT NULL DEFAULT ''; #!endif ####### DEFINE VARIABLE ######## #!substdef "!MY_IP_ADDR!X.X.X.X!g" #!substdef "!MY_WS_PORT!8080!g" #!substdef "!MY_WSS_PORT!4443!g" #!substdef "!MY_WS_ADDR!tcp:MY_IP_ADDR:MY_WS_PORT!g" #!substdef "!MY_WSS_ADDR!tls:MY_IP_ADDR:MY_WSS_PORT!g" #!substdef "!MY_MSRP_PORT!4444!g" #!substdef "!MY_WSS_ADDR!tls:MY_IP_ADDR:MY_WSS_PORT!g" #!substdef "!MY_MSRP_ADDR!tls:MY_IP_ADDR:MY_MSRP_PORT!g" #!substdef "!MSRP_MIN_EXPIRES!1800!g" #!substdef "!MSRP_MAX_EXPIRES!3600!g" ####### Include Local Config If Exists ######### import_file "kamailio-local.cfg" ####### Defined Values ######### # *** Value defines - IDs used later in config #!ifdef WITH_DEBUG #!define DBGLEVEL 3 #!else #!define DBGLEVEL 2 #!endif #!ifdef WITH_MYSQL # - database URL - used to connect to database server by modules such # as: auth_db, acc, usrloc, a.s.o. #!trydef DBURL "mysql://kamailio:kamailiorw@localhost/kamailio" #!endif #!ifdef WITH_MULTIDOMAIN # - the value for 'use_domain' parameters #!define MULTIDOMAIN 1 #!else #!define MULTIDOMAIN 0 #!endif # - flags # FLT_ - per transaction (message) flags #!define FLT_ACC 1 #!define FLT_ACCMISSED 2 #!define FLT_ACCFAILED 3 #!define FLT_NATS 5 # FLB_ - per branch flags #!define FLB_NATB 6 #!define FLB_NATSIPPING 7 ####### Global Parameters ######### /* LOG Levels: 3=DBG, 2=INFO, 1=NOTICE, 0=WARN, -1=ERR, ... */ debug=DBGLEVEL /* set to 'yes' to print log messages to terminal or use '-E' cli option */ log_stderror=no memdbg=5 memlog=5 log_facility=LOG_LOCAL0 log_prefix="{$mt $hdr(CSeq) $ci} " /* number of SIP routing processes for each UDP socket * - value inherited by tcp_children and sctp_children when not set explicitely */ children=8 /* uncomment the next line to disable TCP (default on) */ # disable_tcp=yes /* number of SIP routing processes for all TCP/TLS sockets */ # tcp_children=8 /* uncomment the next line to disable the auto discovery of local aliases * based on reverse DNS on IPs (default on) */ # auto_aliases=no /* add local domain aliases - it can be set many times */ # alias="sip.mydomain.com" /* listen sockets - if none set, Kamailio binds to all local IP addresses * - basic prototype (full prototype can be found in Wiki - Core Cookbook): * listen=[proto]:[localip]:[lport] advertise [publicip]:[pport] * - it can be set many times to add more sockets to listen to */ listen=udp:X.X.X.X:5060 listen=udp:100.66.138.7:5060 /* life time of TCP connection when there is no traffic * - a bit higher than registration expires to cope with UA behind NAT */ tcp_connection_lifetime=3605 /* upper limit for TCP connections (it includes the TLS connections) */ tcp_max_connections=2048 #!ifdef WITH_JSONRPC tcp_accept_no_cl=yes #!endif #!ifdef WITH_TLS enable_tls=yes /* upper limit for TLS connections */ tls_max_connections=2048 #!endif /* set it to yes to enable sctp and load sctp.so module */ enable_sctp=no ####### Custom Parameters ######### /* These parameters can be modified runtime via RPC interface * - see the documentation of 'cfg_rpc' module. * * Format: group.id = value 'desc' description * Access: $sel(cfg_get.group.id) or @cfg_get.group.id */ #!ifdef WITH_PSTN /* PSTN GW Routing * * - pstn.gw_ip: valid IP or hostname as string value, example: * pstn.gw_ip = "10.0.0.101" desc "My PSTN GW Address" * * - by default is empty to avoid misrouting */ pstn.gw_ip = "" desc "PSTN GW Address" pstn.gw_port = "" desc "PSTN GW Port" #!endif #!ifdef WITH_VOICEMAIL /* VoiceMail Routing on offline, busy or no answer * * - by default Voicemail server IP is empty to avoid misrouting */ voicemail.srv_ip = "" desc "VoiceMail IP Address" voicemail.srv_port = "5060" desc "VoiceMail Port" #!endif ####### Modules Section ######## /* set paths to location of modules */ # mpath="/usr/lib/x86_64-linux-gnu/kamailio/modules/" #!ifdef WITH_MYSQL loadmodule "db_mysql.so" #!endif #!ifdef WITH_JSONRPC loadmodule "xhttp.so" #!endif loadmodule "jsonrpcs.so" loadmodule "kex.so" loadmodule "corex.so" loadmodule "tm.so" loadmodule "tmx.so" loadmodule "sl.so" loadmodule "rr.so" loadmodule "pv.so" loadmodule "maxfwd.so" loadmodule "usrloc.so" loadmodule "registrar.so" loadmodule "textops.so" loadmodule "textopsx.so" loadmodule "siputils.so" loadmodule "xlog.so" loadmodule "sanity.so" loadmodule "ctl.so" loadmodule "cfg_rpc.so" loadmodule "acc.so" loadmodule "counters.so" loadmodule "rtpengine.so" #loadmodule "rtpproxy.so" #!ifdef WITH_WEBSOCKETS loadmodule "xhttp.so" loadmodule "websocket.so" # loadmodule "nathelper.so" #!endif #!ifdef WITH_AUTH loadmodule "auth.so" loadmodule "auth_db.so" #!ifdef WITH_IPAUTH loadmodule "permissions.so" #!endif #!endif #!ifdef WITH_ALIASDB loadmodule "alias_db.so" #!endif #!ifdef WITH_SPEEDDIAL loadmodule "speeddial.so" #!endif #!ifdef WITH_MULTIDOMAIN loadmodule "domain.so" #!endif #!ifdef WITH_PRESENCE loadmodule "presence.so" loadmodule "presence_xml.so" #!endif #!ifdef WITH_NAT loadmodule "nathelper.so" #!ifdef WITH_RTPENGINE #!else #!loadmodule "rtpproxy.so" #!endif #!endif #!ifdef WITH_TLS loadmodule "tls.so" #!endif #!ifdef WITH_ANTIFLOOD loadmodule "htable.so" loadmodule "pike.so" #!endif #!ifdef WITH_DEBUG loadmodule "debugger.so" #!endif # ----------------- setting module-specific parameters --------------- # ----- jsonrpcs params ----- modparam("jsonrpcs", "pretty_format", 1) /* set the path to RPC fifo control file */ # modparam("jsonrpcs", "fifo_name", "/run/kamailio/kamailio_rpc.fifo") /* set the path to RPC unix socket control file */ # modparam("jsonrpcs", "dgram_socket", "/run/kamailio/kamailio_rpc.sock") #!ifdef WITH_JSONRPC modparam("jsonrpcs", "transport", 7) #!endif # ----- ctl params ----- /* set the path to RPC unix socket control file */ # modparam("ctl", "binrpc", "unix:/run/kamailio/kamailio_ctl") # ----- sanity params ----- modparam("sanity", "autodrop", 0) # ----- tm params ----- # auto-discard branches from previous serial forking leg modparam("tm", "failure_reply_mode", 3) # default retransmission timeout: 30sec modparam("tm", "fr_timer", 30000) # default invite retransmission timeout after 1xx: 120sec modparam("tm", "fr_inv_timer", 120000) #rtp modparam("rtpengine", "rtpengine_sock", "udp:127.0.0.1:2223") modparam("rtpengine", "force_send_interface", "100.66.138.7") #modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722") # ----- rr params ----- # set next param to 1 to add value to ;lr param (helps with some UAs) modparam("rr", "enable_full_lr", 0) # do not append from tag to the RR (no need for this script) modparam("rr", "append_fromtag", 0) # ----- registrar params ----- modparam("registrar", "method_filtering", 1) /* uncomment the next line to disable parallel forking via location */ # modparam("registrar", "append_branches", 0) /* uncomment the next line not to allow more than 10 contacts per AOR */ # modparam("registrar", "max_contacts", 10) /* max value for expires of registrations */ modparam("registrar", "max_expires", 3600) /* set it to 1 to enable GRUU */ modparam("registrar", "gruu_enabled", 0) /* set it to 0 to disable Path handling */ modparam("registrar", "use_path", 1) /* save Path even if not listed in Supported header */ modparam("registrar", "path_mode", 0) # ----- 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 ww 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=$rd") modparam("acc", "failed_transaction_flag", FLT_ACCFAILED) /* enhanced DB accounting */ #!ifdef WITH_ACCDB modparam("acc", "db_flag", FLT_ACC) modparam("acc", "db_missed_flag", FLT_ACCMISSED) modparam("acc", "db_url", DBURL) modparam("acc", "db_extra", "src_user=$fU;src_domain=$fd;src_ip=$si;" "dst_ouser=$tU;dst_user=$rU;dst_domain=$rd") #!endif # ----- usrloc params ----- modparam("usrloc", "timer_interval", 60) modparam("usrloc", "timer_procs", 1) modparam("usrloc", "use_domain", MULTIDOMAIN) /* enable DB persistency for location entries */ #!ifdef WITH_USRLOCDB modparam("usrloc", "db_url", DBURL) modparam("usrloc", "db_mode", 2) #!endif # ----- auth_db params ----- #!ifdef WITH_AUTH modparam("auth_db", "db_url", DBURL) modparam("auth_db", "calculate_ha1", yes) modparam("auth_db", "password_column", "password") modparam("auth_db", "load_credentials", "") modparam("auth_db", "use_domain", MULTIDOMAIN) # ----- permissions params ----- #!ifdef WITH_IPAUTH modparam("permissions", "db_url", DBURL) modparam("permissions", "load_backends", 1) #!endif #!endif # ----- alias_db params ----- #!ifdef WITH_ALIASDB modparam("alias_db", "db_url", DBURL) modparam("alias_db", "use_domain", MULTIDOMAIN) #!endif # ----- speeddial params ----- #!ifdef WITH_SPEEDDIAL modparam("speeddial", "db_url", DBURL) modparam("speeddial", "use_domain", MULTIDOMAIN) #!endif # ----- domain params ----- #!ifdef WITH_MULTIDOMAIN modparam("domain", "db_url", DBURL) /* register callback to match myself condition with domains list */ modparam("domain", "register_myself", 1) #!endif #!ifdef WITH_PRESENCE # ----- presence params ----- modparam("presence", "db_url", DBURL) # ----- presence_xml params ----- modparam("presence_xml", "db_url", DBURL) modparam("presence_xml", "force_active", 1) #!endif #!ifdef WITH_NAT #!ifdef WITH_RTPENGINE # ----- rtpengine params ----- #modparam("rtpengine", "rtpengine_sock", "udp:127.0.0.1:2223") #!else # ----- rtpproxy params ----- #!modparam("rtpproxy", "rtpproxy_sock", "udp:127.0.0.1:7722") #!endif # ----- nathelper params ----- modparam("nathelper", "natping_interval", 30) modparam("nathelper", "ping_nated_only", 1) modparam("nathelper", "sipping_bflag", FLB_NATSIPPING) modparam("nathelper", "sipping_from", "sip:pinger@sip.super.fr") #modparam("nathelper", "sipping_method", "OPTIONS") # params needed for NAT traversal in other modules modparam("nathelper|registrar", "received_avp", "$avp(RECEIVED)") modparam("usrloc", "nat_bflag", FLB_NATB) #!endif #!ifdef WITH_TLS # ----- tls params ----- modparam("tls", "config", "/etc/kamailio/tls.cfg") #!endif #!ifdef WITH_ANTIFLOOD # ----- pike params ----- modparam("pike", "sampling_time_unit", 2) modparam("pike", "reqs_density_per_unit", 40) modparam("pike", "remove_latency", 4) # ----- htable params ----- /* ip ban htable with autoexpire after 5 minutes */ modparam("htable", "htable", "ipban=>size=8;autoexpire=300;") #!endif #!ifdef WITH_DEBUG # ----- debugger params ----- modparam("debugger", "cfgtrace", 1) modparam("debugger", "log_level_name", "exec") #!endif ######## websocket ############ #!ifdef WITH_TLS enable_tls=yes #!endif listen=MY_IP_ADDR #!ifdef WITH_WEBSOCKETS listen=MY_WS_ADDR tcp_accept_no_cl=yes # tcp_rd_buf_size=65536 #!ifdef WITH_TLS listen=MY_WSS_ADDR #!endif #!endif ######## SECURITY ####### server_signature=no sip_warning=0 user_agent_header="User-Agent: SIP Server" ####### Routing Logic ######## /* Main SIP request routing logic * - processing of any incoming SIP request starts with this route * - note: this is the same as route { ... } */ request_route { route(REQINIT); route(NATDETECT); route(REGISTER); route(INVITE); route(ACK); route(BYE); return; } # Wrapper for relaying requests #Check initial detail route[REQINIT] { # no connect for sending replies set_reply_no_connect(); # enforce symmetric signaling # - send back replies to the source address of request force_rport(); if($ua =~ "friendly|scanner|sipcli|sipvicious|VaxSIPUserAgent|pplsip") { # silent drop for scanners - uncomment next line if want to reply # sl_send_reply("200", "OK"); exit; } if (!mf_process_maxfwd_header("10")) { sl_send_reply("483", "Too Many Hops"); exit; } if(is_method("OPTIONS") && uri==myself && $rU==$null) { sl_send_reply("200", "Keepalive"); exit; } if(!sanity_check("17895", "7")) { xlog("Malformed SIP request from $si:$sp\n"); exit; } } # Caller NAT detection route[NATDETECT] { #!ifdef WITH_NAT force_rport(); if (nat_uac_test("19")) { if (is_method("REGISTER")) { fix_nated_register(); } else { if(is_first_hop()) { set_contact_alias(); } } setflag(FLT_NATS); } #!endif return; } route[REGISTER] { if (is_method("REGISTER")) { t_on_reply("1"); force_send_socket(100.66.138.7:5060); t_relay_to_udp("100.66.138.5", "5060"); exit(); } } route[INVITE] { if (( is_method("REFER")) || is_method("INVITE") ||is_method("NOTIFY")) { record_route(); if (src_ip == "100.66.138.5") { if(lookup("location") && !is_method("OPTIONS")) { xlog("L_NOTICE", "user enregistrax"); force_send_socket(X.X.X.X:5060); rtpengine_manage("replace-origin replace-session-connection media-address=X.X.X.X direction=priv direction=pub"); t_relay(); } else { sl_send_reply("403","Not registred"); } } else { force_send_socket(100.66.138.7:5060); rtpengine_manage("replace-origin replace-session-connection media-address=100.66.138.7 direction=pub direction=priv"); t_relay_to_udp("100.66.138.5", "5060"); } } } route[ACK] { if (is_method("ACK")) { if (src_ip == "100.66.138.5") { force_send_socket(udp:X.X.X.X:5060); t_relay(); } else { force_send_socket(udp:100.66.138.7:5060); t_relay(); } exit(); } } route[BYE] { if (is_method("BYE|CANCEL")) { if (src_ip == "100.66.138.5") { force_send_socket(udp:X.X.X.X:5060); t_relay(); } else { force_send_socket(udp:100.66.138.7:5060); t_relay(); } exit(); } } onreply_route { if (status=~ "180|183") { rtpengine_manage("replace-origin replace-session-connection"); } if (status=~ "200") { if(has_body("application/sdp")) { rtpengine_manage("replace-origin replace-session-connection"); } } } onreply_route[1] { if (status=~ "2[0-9][0-9]"){ save("location"); xlog("L_NOTICE", "enregistrement"); } } ====================

2 1

best approach to setup SIP Session sharing between servers
by Sergio Charrua 28 Feb '24

28 Feb '24

Hi all! I am having some difficulties/doubts on what would be the best approach to let multiple Kamailio servers share their SIP sessions between each other. The goal is to have HA on Kamailio cluster such that if a call is received and initiated on Kamailio #1, and during any moment of the call (before or while established) if the server #1 goes down or Kamailio stops working for any reason, the call can be processed by Kamailio server #n available in the cluster. I do not want to mess with Virtual IPs or DNS, that is not the point, but instead need to get a proper way to share SIP sessions between Kamailio servers such that any server could continue the call without issue. I have checked the Dialog and DMQ module, but I am not sure if that is the way to go.... Could any one share a solution for this? Greatly appreciated. Cheers, *Sérgio Charrua* *www.voip.pt <http://www.voip.pt/>*

8 11

Clarification on pv_www_authenticate
by James Lipski 28 Feb '24

28 Feb '24

Hello, I would like get further information on the "pv_www_authenticate" function from auth module. For the response code "-1", which is listed as "generic error", what exactly is covered when this function returns this? Is it just everything else that isn't listed reason (invalid password, nonce expired, no credentials, etc...). On my production system, I'm seeing this as a response code on some registration requests, and just want to know what is causing this (enabling full verbose logging is a bit difficult on my production system, and want to try to replicate it on my test environment, however just need clarification on what this covers). Thank you.

2 1

Topos methods_nocontact parameter
by Benoit Panizzon 27 Feb '24

27 Feb '24

Hi I'm having another go at topos trying to solve an issue of sip messages getting to big for certain clients to process. Unfortunately some methods (ACK/PRACK/BYE probably CANCEL) do not contain a contact header, therefore the topology is still revealed (and potentially a lot of via header inserted increasing message size). Is it safe to set methods_nocontact to an empty string to force creation of a Contact header for every SIP method? Is there another way to completely hide topology aka keeping header small? Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________

3 7

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