[Serusers] 483 Too many Hops Error with SER Presence Agent

Greger V. Teigre greger at teigre.com
Tue Nov 27 08:57:19 CET 2007


The uri==myself test is false and the REGISTER is forwarded based on the 
request uri.
Make sure that you try to register with a domain you have an alias for.
g-)

Carlos Angeles wrote:
> Hi...
>
> I have installed SER-0.10.99 with presence capabilities following the presence hadnbook, the server is running OK, but I have problems when I tried to register a client (x-lite).  I am getting 483: Too many hops...
>
> What can be the problem?????
> Thank you for your help,
>
> Carlos
>
> Config file:
> debug=3         # debug level (cmd line: -dddddddddd)
> #fork=yes
> #log_stderror=no	# (cmd line: -E)
> #memlog=5 # memory debug log level
> #log_facility=LOG_LOCAL0 # sets the facility used for logging (see syslog(3))
>
> check_via=no	# (cmd. line: -v)
> dns=no           # (cmd. line: -r)
> rev_dns=no      # (cmd. line: -R)
> port=5060
> children=2
> alias="test-domain.com"
>
> #user=ser
> #group=ser
> #open_fd_limit=1024 # sets the open file descriptors limit
> mhomed=yes  # usefull for multihomed hosts, small performance penalty
>
> #disable_tcp=yes 
> #tcp_accept_aliases=yes # accepts the tcp alias via option (see NEWS)
> #tcp_poll_method="sigio_rt"
>
> # ------------------ module loading ----------------------------------
>
> # Uncomment this if you want to use SQL database
> loadmodule "/base/ser/directory/lib/ser/modules//sl.so"
> loadmodule "/base/ser/directory/lib/ser/modules/avp.so"
> loadmodule "/base/ser/directory/lib/ser/modules//avpops.so"
> loadmodule "/base/ser/directory/lib/ser/modules//tm.so"
> loadmodule "/base/ser/directory/lib/ser/modules//rr.so"
> loadmodule "/base/ser/directory/lib/ser/modules//maxfwd.so"
> loadmodule "/base/ser/directory/lib/ser/modules//usrloc.so"
> loadmodule "/base/ser/directory/lib/ser/modules//registrar.so"
> loadmodule "/base/ser/directory/lib/ser/modules//textops.so"
> loadmodule "/base/ser/directory/lib/ser/modules//mysql.so"
> loadmodule "/base/ser/directory/lib/ser/modules//dialog.so"
> loadmodule "/base/ser/directory/lib/ser/modules//rls.so"
> loadmodule "/base/ser/directory/lib/ser/modules/pa.so"
> loadmodule "/base/ser/directory/lib/ser/modules//presence_b2b.so"
> loadmodule "/base/ser/directory/lib/ser/modules//uri.so"
> loadmodule "/base/ser/directory/lib/ser/modules//uri_db.so"
> loadmodule "/base/ser/directory/lib/ser/modules//domain.so"
> loadmodule "/base/ser/directory/lib/ser/modules//fifo.so"
> loadmodule "/base/ser/directory/lib/ser/modules//xmlrpc.so"
> loadmodule "/base/ser/directory/lib/ser/modules//xlog.so"
> #loadmodule "/base/ser/directory/lib/ser/modules//unixsock.so"
>
> # Uncomment this if you want digest authentication
> # mysql.so must be loaded !
> loadmodule "/base/ser/directory/lib/ser/modules//auth.so"
> loadmodule "/base/ser/directory/lib/ser/modules//auth_db.so"
> loadmodule "/base/ser/directory/lib/ser/modules//msilo.so"
>
> # ----------------- setting module-specific parameters ---------------
>
> # modparam("msilo","registrar","sip:registrar at test-domain.com")
> modparam("msilo","use_contact",0)
> modparam("msilo","expire_time",7200)
>
> # -- usrloc params --
>
> # -- 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)
>
> modparam("rls", "min_expiration", 200)
> modparam("rls", "max_expiration", 300)
> modparam("rls", "default_expiration", 300)
> modparam("rls", "auth", "none")
> modparam("rls", "xcap_root", "http://localhost/xcap")
> modparam("rls", "reduce_xcap_needs", 1)
> modparam("rls", "db_mode", 0)
> modparam("rls", "db_url", "mysql://ser:heslo@localhost:3306/ser")
>
> modparam("pa", "use_db", 0)
> # allow storing authorization requests for offline users into database
> modparam("pa", "use_offline_winfo", 1)
> # how often try to remove old stored authorization requests
> modparam("pa", "offline_winfo_timer", 600)
> # how long stored authorization requests live
> modparam("pa", "offline_winfo_expiration", 600)
> modparam("pa", "db_url", "mysql://ser:heslo@localhost:3306/ser")
> # mode of PA authorization: none, implicit or xcap
> modparam("pa", "auth", "xcap")
> modparam("pa", "auth_xcap_root", "http://localhost/xcap")
> # do not authorize watcherinfo subscriptions
> modparam("pa", "winfo_auth", "none")
> # use only published information if set to 0
> modparam("pa", "use_callbacks", 1)
> # don't accept internal subscriptions from RLS, ...
> modparam("pa", "accept_internal_subscriptions", 0)
> # maximum value of Expires for subscriptions
> modparam("pa", "max_subscription_expiration", 600)
> # maximum value of Expires for publications
> modparam("pa", "max_publish_expiration", 120)
> # how often test if something changes and send NOTIFY
> modparam("pa", "timer_interval", 10)
>
> # route for generated SUBSCRIBE requests for presence
> modparam("presence_b2b", "presence_route", "")
> # waiting time from error to new attepmt about SUBSCRIBE
> modparam("presence_b2b", "on_error_retry_time", 60)
> # how long wait for NOTIFY with Subscription-Status=terminated after unsubscribe
> modparam("presence_b2b", "wait_for_term_notify", 33)
> # how long before expiration send renewal SUBSCRIBE request
> modparam("presence_b2b", "resubscribe_delta", 30)
> # minimal time to send renewal SUBSCRIBE request from receiving previous response
> modparam("presence_b2b", "min_resubscribe_time", 60)
> # default expiration timeout
> modparam("presence_b2b", "default_expiration", 3600)
> # process internal subscriptions to presence events
> modparam("presence_b2b", "handle_presence_subscriptions", 1)
>
> modparam("usrloc", "db_mode", 0)
> modparam("domain", "db_mode", 1)
> modparam("domain|uri_db|acc|auth_db|usrloc|msilo", "db_url", "mysql://ser:heslo@localhost:3306/ser")
>
> modparam("fifo", "fifo_file", "/tmp/ser_fifo")
>
> # -------------------------  request routing logic -------------------
>
> # main routing logic
>
> route{
> 	# XML RPC
> 	if (method == "POST" ||  method == "GET") {
> 		create_via();
> 		dispatch_rpc();
> 		break;
> 	}
>
> 	# 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>=  max_len ) {
> 		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 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 (!lookup_domain("To")) {
> 			xlog("L_ERR", "Unknown domain to: %tu from: %fu\n");
> 			route(1);
> 			break;
> 		}
> 		
> 		if (method=="SUBSCRIBE") {
> 			if (!t_newtran()) {
> 				sl_reply_error();
> 				break;
> 			};
> 			
> 			if (@to.tag=="") { 
> 				# only for new subscriptions (with empty to tag)
>
> 				if (lookup_user("To")) {
> 					# existing user -> it is subscription to PA
> 					if (handle_subscription("registrar")) {
> 						if ((@msg.event=~"presence\.winfo")) {
> 							# new watcher info subscription
> 							# sends one watcher info NOTIFY message with all saved authorization requests
> 							xlog("L_ERR", "dumping stored winfo to %fu\n");
> 							dump_stored_winfo("registrar", "presence");
> 						}
> 						else {
> 							# new presence subscription
> 							if ((@msg.event=~"presence") && (%subscription_status=="pending")) {
> 								# if offline user and new pending subscription 
> 								if (!target_online("registrar")) {
> 									#%subscription_status="waiting"; # store it as waiting subscription
> 									xlog("L_ERR", "storing 'pending' winfo to: %tu, from: %fu\n");
> 									store_winfo("registrar");
> 								}
> 							}
> 						}
> 					}
> 					break;
> 				}
> 				
> 				if ((@msg.supported=~"eventlist")) {
> 					# such user doesn't exist and Supported header field
> 					#    -> probably RLS subscription
> 				
> 					if (lookup_domain("From")) {
> 						if (lookup_user("From")) {
> 							if (is_simple_rls_target("$uid-list")) {
> 								# log(1, "it is simple subscription!\n");
> 								# takes From UID and makes XCAP query for user's 
> 								# list named "default"
> 								if (!query_resource_list("default")) {
> 									t_reply("404", "No such user list");
> 									break;
> 								}
> 							}
> 						}
> 					}
> 				
> 					if (!have_flat_list()) {
> 						# query_resource_list failed or was not called
> 						# do standard RLS query acording to To/AOR
> 						if (!query_rls_services()) {
> 							log(1, "XCAP query failed\n");
> 							t_reply("404", "No such list URI");
> 							break;
> 						}
> 					}
> 				
> 					# uncomment this if you want to authenticate first SUBSCRIBE request to resource list
> #					if (!proxy_authenticate("test-domain.com", "credentials")) {
> #						proxy_challenge( "test-domain.com", "0");
> #						break;
> #					};	
> 					
> 					handle_rls_subscription("1");
> 				}
> 				else {
> 					# not resource list subscription -> invalid user
> 					xlog("L_ERR", "subscription to invalid user %tu\n");
> 					t_reply("404", "User not found");
> 				}
> 				
> 				break;
> 			}
> 			else {
> 				# renewal subscriptions - try to handle it as RLS and if failed, handle it as PA subscription
> 				# FIXME: better will be test like existing_rls_subscription() 
> 				#        and existing_subscription("registrar")
> 				if (!handle_rls_subscription("0")) {
> 					handle_subscription("registrar");
> 				}
> 				break;
> 			}
> 		};
>
> 		# get user (common for all other messages than SUBSCRIBE)
> 		if (!lookup_user("To")) {
> 			# log(1, "Unknown user - message should be forwarded?");
> #			# break;
> 			append_hf("P-hint: unknown user\r\n"); 
> 			route(1);
> 			break;
> 		}
> 		
> 		if (method=="PUBLISH") {
> 			if (!t_newtran()) {
> #			   log(1, "newtran error\n");
> 			   sl_reply_error();
> 			   break;
> 			};
> 			handle_publish("registrar");
>
> 			# deliver messages to online user
> 			# TODO: only if user goes from offline to online?
> 			if (target_online("registrar")) {
> 				# log(1, "Dumping stored messages\n");
> 				# dump stored messages - route it through myself (otherwise routed via DNS!)
> 				if (m_dump("sip:127.0.0.1")) {
> 					xlog("L_ERR", "MSILO: offline messages for %fu dumped\n");
> 				}
> 			}
>
> 			break;
> 		};
> 	
>  		if (method=="NOTIFY") {
>  			if (!t_newtran()) {
>  			   log(1, "newtran error\n");
>  			   sl_reply_error();
> 			   break;
>  			};
> 			# handle notification sent in internal subscriptions (presence_b2b)
>  			if (!handle_notify()) {
>  				t_reply("481", "Unable to handle notification");
>  			}
>  			break;
>  		};
> 		
> 		if (method=="MESSAGE") {
>
> 			if (authorize_message("http://localhost/xcap")) {
> 				
> 				# use usrloc for delivery
> 				if (lookup("location")) {
> 				
> 					log(1, "Delivering MESSAGE using usrloc\n");
> 					t_on_failure("1");
> 					if (!t_relay()) {
> 						sl_reply_error();
> 					}
> 					
> 					break;
> 				}
> 				else {
> 					# store messages for offline user
> 					xlog("L_ERR", "MSILO: storing MESSAGE for %tu\n");
> 					
> 					if (!t_newtran()) {
> 					   log(1, "newtran error\n");
> 					   sl_reply_error();
> 					   break;
> 					};
>
> 					# store only text messages NOT isComposing... !
> 					if (search("^(Content-Type|c):.*application/im-iscomposing\+xml.*")) {
> 						log(1, "it is only isComposing message - ignored\n");
> 						t_reply("202", "Ignored");
> 						break;
> 					}
> 					
> 					if (m_store("0", "sip:127.0.0.1")) {
> 	#	                log(1, "MSILO: offline message stored\n");
> 						if (!t_reply("202", "Accepted")) {
> 							sl_reply_error();
> 						};
> 					} else {
> 						log(1, "MSILO: error storing offline message\n");
> 						if (!t_reply("503", "Service Unavailable")) {
> 							sl_reply_error();
> 						};
> 					};
> 					break;
> 				}
> 				break;
> 			}
> 			else {
> 				# log(1, "unauthorized message\n");
> 				sl_reply("403", "Forbidden");
> 			}
> 			break;
> 		}
> 		
> 		if (method=="REGISTER") {
> 			# uncomment this if you want to authenticate REGISTER request
> #			if (!www_authenticate("", "credentials")) {
> #				www_challenge("", "0");
> #				break;
> #			};
> 			
> 			save("location");
> 			
> 			# dump stored messages - route it through myself (otherwise routed via DNS!)
> 			if (m_dump("sip:127.0.0.1")) {
>                 xlog("L_ERR", "MSILO: offline messages for %fu dumped\n");
> 			}
> 			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
> 	if (!t_relay()) {
> 		sl_reply_error();
> 	};
> }
>
>
> failure_route[1] {
> 	# forwarding failed -- check if the request was a MESSAGE
> 	if (!method=="MESSAGE") { break; };
> 	log(1, "MSILO: MESSAGE forward failed - storing it\n");
> 	
>     # we have changed the R-URI with the contact address, ignore it now
> 	if (m_store("0", "")) {
> 		t_reply("202", "Accepted");
> 	} else {
> 		log(1, "MSILO: offline message NOT stored\n");
> 		t_reply("503", "Service Unavailable");
> 	};
> }
>
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