[OpenSIPS-Users] ACK never reach UAS

Jose Solares jsolares at gmail.com
Thu Dec 29 02:03:09 CET 2011


I learned the hard way that sipp doesn't support record routing in their default scenarios, at first i thought the example for load balancing was wrong or something had changed from 1.5 to 1.7, sipp to asterisk directly worked fine, but sipp -> opensips -> 2 asterisk didn't, the acks were reaching opensips but opensips didn't send them on.

so i had to change it, first you dump the xml with `sipp -sd uac`, then you add rrs="true" in your recv tags
Like so:
<recv response="180" rrs="true" optional="true">
 </recv>

You also need to change the ACK and BYE's like so, since you're using rrs="true" you have [next_url] and [routes] available to use:

ACK [next_url] SIP/2.0
Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
From: sipp <sip:sipp@[local_ip]:[local_port]>;tag=[pid]SIPpTag00[call_number]
To: sut <sip:[service]@[remote_ip]:[remote_port]>[peer_tag_param]
[routes]
Call-ID: [call_id]
CSeq: 1 ACK
Contact: sip:sipp@[local_ip]:[local_port]
Max-Forwards: 70
Subject: Performance Test
Content-Length: 0

This worked for the UAC part, not sure what would need to change in the UAS but it should be similar.

Regards,

On Dec 28, 2011, at 6:45 PM, M.Abdulaziz wrote:

> Thank you Bogdan for replying,
> 
> 
> UAC send the ACK to the correct port of opensips but after it reaches
> opensips, opensips doesn't know where to send this ACK
> 
> I tried to perform record routing in my cfg as in the performance test
> tutorial( http://www.opensips.org/Resources/StressTests#toc6 test_E.cfg ) 
> 
> the same problem happend, ACKs is never forwarded
> 
> I traced the packages exchanged using wireshark & I found out that ACK is
> looping inside opensips
> here is the wireshark trace of only one call
> http://opensips-open-sip-server.1449251.n2.nabble.com/file/n7134497/_221-6320%40192.168.1.69-Trace
> _221-6320%40192.168.1.69-Trace 
> 
> Attached the trace of wireshark
> 
> Note that port numbers were given as follow:
> UAC:5069
> opensips: 5060
> UAS: 5066
> 
> & all resides in the same machine (192.168.1.69)
> 
> here is my config file:
> 
> 
> ####### Global Parameters #########
> 
> debug=3
> log_stderror=no
> 
> fork=yes
> children=32
> 
> listen=udp:192.168.1.69:5060
> 
> ####### Modules Section ########
> 
> #set module path
> mpath="modules/"
> 
> /* uncomment next line for MySQL DB support */
> #loadmodule "db_mysql.so"
> loadmodule "signaling.so"
> loadmodule "sl.so"
> loadmodule "tm.so"
> loadmodule "rr.so"
> loadmodule "maxfwd.so"
> loadmodule "usrloc.so"
> loadmodule "registrar.so"
> loadmodule "textops.so"
> loadmodule "mi_fifo.so"
> loadmodule "uri.so"
> loadmodule "dialog.so"
> #loadmodule "acc.so"
> /* uncomment next lines for MySQL based authentication support 
>   NOTE: a DB (like db_mysql) module must be also loaded */
> #loadmodule "auth.so"
> #loadmodule "auth_db.so"
> /* uncomment next line for aliases support
>   NOTE: a DB (like db_mysql) module must be also loaded */
> #loadmodule "alias_db.so"
> /* uncomment next line for multi-domain support
>   NOTE: a DB (like db_mysql) module must be also loaded
>   NOTE: be sure and enable multi-domain support in all used modules
>         (see "multi-module params" section ) */
> #loadmodule "domain.so"
> /* uncomment the next two lines for presence server support
>   NOTE: a DB (like db_mysql) module must be also loaded */
> #loadmodule "presence.so"
> #loadmodule "presence_xml.so"
> 
> 
> # ----------------- setting module-specific parameters ---------------
> 
> 
> # ----- mi_fifo params -----
> modparam("mi_fifo", "fifo_name", "/tmp/opensips_fifo")
> 
> modparam("dialog","db_mode",0)
> 
> 
> # ----- 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)
> 
> 
> # ----- registrar params -----
> /* uncomment the next line not to allow more than 10 contacts per AOR */
> #modparam("registrar", "max_contacts", 10)
> 
> 
> # ----- usrloc params -----
> modparam("usrloc", "db_mode",   0)
> /* uncomment the following lines if you want to enable DB persistency
>   for location entries */
> #modparam("usrloc", "db_mode",   2)
> #modparam("usrloc", "db_url",
> #	"mysql://opensips:opensipsrw@localhost/opensips")
> 
> 
> # ----- uri params -----
> modparam("uri", "use_uri_table", 0)
> 
> modparam("tm", "wt_timer", 2)
> modparam("tm", "restart_fr_on_each_reply", 0)
> 
> # ----- acc params -----
> /* what sepcial events should be accounted ? */
> #modparam("acc", "early_media", 1)
> #modparam("acc", "report_ack", 1)
> #modparam("acc", "report_cancels", 1)
> /* 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", "failed_transaction_flag", 3)
> #modparam("acc", "log_flag", 1)
> #modparam("acc", "log_missed_flag", 2)
> /* uncomment the following lines to enable DB accounting also */
> #modparam("acc", "db_flag", 1)
> #modparam("acc", "db_missed_flag", 2)
> 
> 
> # ----- auth_db params -----
> /* uncomment the following lines if you want to enable the DB based
>   authentication */
> #modparam("auth_db", "calculate_ha1", yes)
> #modparam("auth_db", "password_column", "password")
> #modparam("auth_db", "db_url",
> #	"mysql://opensips:opensipsrw@localhost/opensips")
> #modparam("auth_db", "load_credentials", "")
> 
> 
> # ----- alias_db params -----
> /* uncomment the following lines if you want to enable the DB based
>   aliases */
> #modparam("alias_db", "db_url",
> #	"mysql://opensips:opensipsrw@localhost/opensips")
> 
> 
> # ----- domain params -----
> /* uncomment the following lines to enable multi-domain detection
>   support */
> #modparam("domain", "db_url",
> #	"mysql://opensips:opensipsrw@localhost/opensips")
> #modparam("domain", "db_mode", 1)   # Use caching
> 
> 
> # ----- multi-module params -----
> /* uncomment the following line if you want to enable multi-domain support
>   in the modules (dafault off) */
> #modparam("auth_db|usrloc|uri", "use_domain", 1)
> 
> 
> # ----- presence params -----
> /* uncomment the following lines if you want to enable presence */
> #modparam("presence|presence_xml", "db_url",
> #	"mysql://opensips:opensipsrw@localhost/opensips")
> #modparam("presence_xml", "force_active", 1)
> #modparam("presence", "server_address", "sip:192.168.1.2:5060")
> 
> 
> ####### Routing Logic ########
> 
> 
> # main request routing logic
> 
> route{
> 
> 	if (!mf_process_maxfwd_header("10")) {
> 		sl_send_reply("483","Too Many Hops");
> 		exit;
> 	}
> 
> 	if (has_totag()) {
> 		# sequential request withing a dialog should
> 		# take the path determined by record-routing
> 		if (loose_route()) {
> 			if (is_method("BYE")) {
> #				setflag(1); # do accounting ...
> #				setflag(3); # ... even if the transaction fails
> 			} else if (is_method("INVITE")) {
> 				# even if in most of the cases is useless, do RR for
> 				# re-INVITEs alos, as some buggy clients do change route set
> 				# during the dialog.
> 				record_route();
> 			}
> 			# route it out to whatever destination was set by loose_route()
> 			# in $du (destination URI).
> 			route(1);
> 		} else {
> 			/* uncomment the following lines if you want to enable presence */
> 			##if (is_method("SUBSCRIBE") && $rd == "your.server.ip.address") {
> 			##	# in-dialog subscribe requests
> 			##	route(2);
> 			##	exit;
> 			##}
> 			if ( is_method("ACK") ) {
> 				if ( t_check_trans() ) {
> 					# non loose-route, but stateful ACK; must be an ACK after 
> 					# a 487 or e.g. 404 from upstream server
> 					t_relay();
> 					exit;
> 				} else {
> 					# ACK without matching transaction ->
> 					# ignore and discard
> 					exit;
> 				}
> 			}
> 			sl_send_reply("404","Not here");
> 		}
> 		exit;
> 	}
> 
> 	#initial requests
> 
> 	# CANCEL processing
> 	if (is_method("CANCEL"))
> 	{
> 		if (t_check_trans())
> 			t_relay();
> 		exit;
> 	}
> 
> 	t_check_trans();
> 
> 	# authenticate if from local subscriber (uncomment to enable auth)
> 	# authenticate all initial non-REGISTER request that pretend to be
> 	# generated by local subscriber (domain from FROM URI is local)
> 	##if (!(method=="REGISTER") && from_uri==myself) /*no multidomain version*/
> 	##if (!(method=="REGISTER") && is_from_local())  /*multidomain version*/
> 	##{
> 	##	if (!proxy_authorize("", "subscriber")) {
> 	##		proxy_challenge("", "0");
> 	##		exit;
> 	##	}
> 	##	if (!db_check_from()) {
> 	##		sl_send_reply("403","Forbidden auth ID");
> 	##		exit;
> 	##	}
> 	##
> 	##	consume_credentials();
> 	##	# caller authenticated
> 	##}
> 
> 	# preloaded route checking
> 	if (loose_route()) {
> 		xlog("L_ERR",
> 		"Attempt to route with preloaded Route's [$fu/$tu/$ru/$ci]");
> 		if (!is_method("ACK"))
> 			sl_send_reply("403","Preload Route denied");
> 		exit;
> 	}
> 
> 	# record routing
> 	if (!is_method("REGISTER|MESSAGE"))
> 		record_route();
> 
> 	# account only INVITEs
> 	if (is_method("INVITE")) {
> 		create_dialog();
> #		setflag(1); # do accounting
> 	}
> 	if (!uri==myself)
> 	## replace with following line if multi-domain support is used
> 	##if (!is_uri_host_local())
> 	{
> 		append_hf("P-hint: outbound\r\n"); 
> 		# if you have some interdomain connections via TLS
> 		##if($rd=="tls_domain1.net") {
> 		##	t_relay("tls:domain1.net");
> 		##	exit;
> 		##} else if($rd=="tls_domain2.net") {
> 		##	t_relay("tls:domain2.net");
> 		##	exit;
> 		##}
> 		route(1);
> 	}
> 
> 	# requests for my domain
> 
> 	## uncomment this if you want to enable presence server 
> 	##   and comment the next 'if' block
> 	##   NOTE: uncomment also the definition of route[2] from  below
> 	##if( is_method("PUBLISH|SUBSCRIBE"))
> 	##		route(2);
> 
> 	if (is_method("PUBLISH"))
> 	{
> 		sl_send_reply("503", "Service Unavailable");
> 		exit;
> 	}
> 	
> 
> 	if (is_method("REGISTER"))
> 	{
> 		# authenticate the REGISTER requests (uncomment to enable auth)
> 		##if (!www_authorize("", "subscriber"))
> 		##{
> 		##	www_challenge("", "0");
> 		##	exit;
> 		##}
> 		##
> 		##if (!db_check_to()) 
> 		##{
> 		##	sl_send_reply("403","Forbidden auth ID");
> 		##	exit;
> 		##}
> 
> 		if (!save("location"))
> 			sl_reply_error();
> 
> 		exit;
> 	}
> 
> 	if ($rU==NULL) {
> 		# request with no Username in RURI
> 		sl_send_reply("484","Address Incomplete");
> 		exit;
> 	}
> 
> 	# apply DB based aliases (uncomment to enable)
> 	##alias_db_lookup("dbaliases");
> 
> 	# do lookup with method filtering
> 	if (!lookup("location","m")) {
> 		switch ($retcode) {
> 			case -1:
> 			case -3:
> 				t_newtran();
> 				t_reply("404", "Not Found");
> 				exit;
> 			case -2:
> 				sl_send_reply("405", "Method Not Allowed");
> 				exit;
> 		}
> 	}
> 
> 	# when routing via usrloc, log the missed calls also
> #	setflag(2);
> 
> 	route(1);
> }
> 
> 
> route[1] {
> 	# for INVITEs enable some additional helper routes
> 	if (!t_relay()) {
> 		sl_reply_error();
> 	};
> 	exit;
> }
> 
> 
> --
> View this message in context: http://opensips-open-sip-server.1449251.n2.nabble.com/ACK-never-reach-UAS-tp7131340p7134497.html
> Sent from the OpenSIPS - Users mailing list archive at Nabble.com.
> 
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