[Serusers] Configuring SER to work as SIP proxy

[dzus at mat.uni.torun.pl]

Thanks, this only partialy solved the problem.

What I am looking for is function which can send (forward) message to  
a specified IP:port based on URI but not changing URI itself.  
rewritehostport() and t_relay() unfortunately does it. I have found  
someting like forward() but not know how to use it. What is the  
difference between:
         rewritehostport("192.168.1.2:5060");
         t_relay();
and
         rewritehostport("192.168.1.2:5060");
         forward(forward(uri:host, uri:port);
?

Thanks, Andrzej

Quoting "Greger V. Teigre" <greger at teigre.com>:

> Try to just t_relay in loose route...
>
> And if that does not work, what type of messages are looped back? 200
> OKs?  ACKs? BYEs?
> g-)
>
> dzus at mat.uni.torun.pl wrote:
>> All,
>>
>> I am trying to configure SER to work as SIP proxy (not registar and  
>>   not redirect). I tried to modify simple ser.cfg which comes with   
>> SER  by adding one line in route[0]:
>>
>> 	rewritehostport("192.168.1.2:5060");
>>
>> This unfortunately doesn't work. The message to my SIP server    
>> 192.168.1.2 are indeed forwarded. But message comming back from    
>> 192.168.1.2 are looped by my SIP proxy (192.168.1.3) back to SIP    
>> server (192.168.1.2).
>>
>> Can someone help me? Or send a working cfg for SIP proxy, I cannot find any.
>>
>> This is my complete ser.cfg:
>> #
>> # $Id: ser.cfg,v 1.25.2.1 2005/02/18 14:30:44 andrei Exp $
>> #
>> # simple quick-start config script
>> #
>>
>> # ----------- global configuration parameters ------------------------
>>
>> #debug=3         # debug level (cmd line: -dddddddddd)
>> #fork=yes
>> #log_stderror=no	# (cmd line: -E)
>>
>> /* Uncomment these lines to enter debugging mode
>> fork=no
>> log_stderror=yes
>> */
>>
>> check_via=no	# (cmd. line: -v)
>> dns=no           # (cmd. line: -r)
>> rev_dns=no      # (cmd. line: -R)
>> port=5060
>> children=4
>> fifo="/tmp/ser_fifo"
>>
>> # ------------------ module loading ----------------------------------
>>
>> # Uncomment this if you want to use SQL database
>> #loadmodule "//lib/ser/modules/mysql.so"
>>
>> loadmodule "//lib/ser/modules/sl.so"
>> loadmodule "//lib/ser/modules/tm.so"
>> loadmodule "//lib/ser/modules/rr.so"
>> loadmodule "//lib/ser/modules/maxfwd.so"
>> loadmodule "//lib/ser/modules/usrloc.so"
>> loadmodule "//lib/ser/modules/registrar.so"
>> loadmodule "//lib/ser/modules/textops.so"
>>
>> # Uncomment this if you want digest authentication
>> # mysql.so must be loaded !
>> #loadmodule "//lib/ser/modules/auth.so"
>> #loadmodule "//lib/ser/modules/auth_db.so"
>>
>> # ----------------- setting module-specific parameters ---------------
>>
>> # -- usrloc params --
>>
>> modparam("usrloc", "db_mode",   0)
>>
>> # Uncomment this if you want to use SQL database
>> # for persistent storage and comment the previous line
>> #modparam("usrloc", "db_mode", 2)
>>
>> # -- auth params --
>> # Uncomment if you are using auth module
>> #
>> #modparam("auth_db", "calculate_ha1", yes)
>> #
>> # If you set "calculate_ha1" parameter to yes (which true in this config),
>> # uncomment also the following parameter)
>> #
>> #modparam("auth_db", "password_column", "password")
>>
>> # -- rr params --
>> # add value to ;lr param to make some broken UAs happy
>> modparam("rr", "enable_full_lr", 1)
>>
>> # -------------------------  request routing logic -------------------
>>
>> # main routing logic
>>
>> route{
>>
>> 	# initial sanity checks -- messages with
>> 	# max_forwards==0, or excessively long requests
>> 	if (!mf_process_maxfwd_header("10")) {
>> 		sl_send_reply("483","Too Many Hops");
>> 		break;
>> 	};
>> 	if (msg:len >=  2048 ) {
>> 		sl_send_reply("513", "Message too big");
>> 		break;
>> 	};
>>
>>
>> 	# we record-route all messages -- to make sure that
>> 	# subsequent messages will go through our proxy; that's
>> 	# particularly good if upstream and downstream entities
>> 	# use different transport protocol
>> 	if (!method=="REGISTER") record_route();
>>
>> 	# subsequent messages withing a dialog should take the
>> 	# path determined by record-routing
>> 	if (loose_route()) {
>> 		# mark routing logic in request
>> 		append_hf("P-hint: rr-enforced\r\n");
>> 		route(1);
>> 		break;
>> 	};
>>
>> 	if (!uri==myself) {
>> 		# mark routing logic in request
>> 		append_hf("P-hint: outbound\r\n");
>> 		route(1);
>> 		break;
>> 	};
>>
>> 	# if the request is for other domain use UsrLoc
>> 	# (in case, it does not work, use the following command
>> 	# with proper names and addresses in it)
>> 	if (uri==myself) {
>>
>> 		if (method=="REGISTER") {
>>
>> # Uncomment this if you want to use digest authentication
>> #			if (!www_authorize("iptel.org", "subscriber")) {
>> #				www_challenge("iptel.org", "0");
>> #				break;
>> #			};
>>
>> 			save("location");
>> 			break;
>> 		};
>>
>> 		lookup("aliases");
>> 		if (!uri==myself) {
>> 			append_hf("P-hint: outbound alias\r\n");
>> 			route(1);
>> 			break;
>> 		};
>>
>> 		# native SIP destinations are handled using our USRLOC DB
>> 		if (!lookup("location")) {
>> 			sl_send_reply("404", "Not Found");
>> 			break;
>> 		};
>> 	};
>> 	append_hf("P-hint: usrloc applied\r\n");
>> 	route(1);
>> }
>>
>> route[1]
>> {
>> 	# send it out now; use stateful forwarding as it works reliably
>> 	# even for UDP2TCP
>>
>> 	# Dzus
>> 	rewritehostport("192.168.1.2:5060");
>>
>> 	if (!t_relay()) {
>> 		sl_reply_error();
>> 	};
>> }
>>
>>
>>
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