[SR-Users] Kamailio + dialog + dispatcher (limiting calls)
Daniel-Constantin Mierla
miconda at gmail.com
Fri Jul 13 09:50:53 CEST 2012
Hello,
you have to use t_relay() instead of forward() -- some of the operations
are done on transaction callbacks for replies. Try this way and if still
troubles, let us know.
Cheers,
Daniel
On 7/13/12 5:46 AM, George Breahna wrote:
> I am trying to limit the total number of concurrent calls processed by
> Kamailio and I'm having a world of trouble.
>
> We are running Kamailio 3.2.3 on Debian Squeeze with the dispatcher module
> and recently enabled the dialog module. The call flow is extremely simple.
> We have two Asterisk servers to which we load balance the incoming calls to,
> nothing more.
>
> Our dialog configuration is the default kamailio config, with the following
> additions:
>
> modparam("dialog", "enable_stats", 1)
> modparam("dialog", "dlg_flag", FLD_DLG)
> modparam("dialog", "hash_size", 4096)
> modparam("dialog", "profiles_with_value", "callquota")
> modparam("dialog", "default_timeout", 300)
> modparam("dialog", "dlg_match_mode",2)
> modparam("dialog", "detect_spirals", 1)
> modparam("dialog", "db_mode", 0)
>
> in request_route we have:
>
> if ( method=="INVITE" ) {
> t_on_failure("FAIL_ONE");
> ds_select_dst("1","4");
> # sl_send_reply("100","Trying");
> t_reply("100", "Trying");
>
> dlg_manage();
> setflag(FLT_ACC); # do accounting
> $var(SIZE) = 0;
> get_profile_size("callquota", "$rU", "$var(SIZE)");
> if( $var(SIZE) >= MAX_NUMBER_OF_CALLS ){
> xlog("DEBUG: Simultaneous calls limit reached for
> $rU: $var(SIZE)\n");
> sl_send_reply("503", "Simultaneous calls limit
> reached");
> exit;
> }
>
> set_dlg_profile("callquota","$rU");
>
> if (get_profile_size("callquota","$var(SIZE)")) {
> xlog("DEBUG: there are $var(SIZE) total calls for
> $rU\n");
> }
>
>
> forward();#uri:host, uri:port);
> exit();
> }
>
> We also added a dlg_manage() in WITHINDLG
>
> if (is_method("BYE")) {
> dlg_manage();
> setflag(FLT_ACC); # do accounting ...
> setflag(FLT_ACCFAILED); # ... even if the transaction fails
> }
>
> The problem is that some dialogs never get erased. Their total number always
> increases and their state is always 1
>
> kamctl fifo profile_list_dlgs callquota
> dialog:: hash=2161:28334339
> state:: 1
> ref_count:: 1
> timestart:: 0
> timeout:: 0
> In the debug logs I see these entries for the dialog module:
>
> ### Starting Call
>
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: ERROR: *** cfgtrace:
> c=[/etc/kamailio/kamailio.cfg] l=515 a=25 n=dlg_manage
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:523]: no dialog callid='1560428909_26358995 at 4.55.13.227' found
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:523]: no dialog callid='1560428909_26358995 at 4.55.13.227' found
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:553]: no dialog callid='1560428909_26358995 at 4.55.13.227' found
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:309]: new dialog on hash 2161
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_handlers.c:271]: route_set <sip:1.2.3.4;lr=on>, contact
> sip:+118884936245 at 4.55.13.227:5060, cseq 402 and bind_addr
> udp:10.10.10.1:5060
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:583]: ref dlg 0x7feb80ef0ae8 with 1 -> 1
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:603]: ref dlg 0x7feb80ef0ae8 with 1 -> 2
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:621]: unref dlg 0x7feb80ef0ae8 with 1 -> 1
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: ERROR: *** cfgtrace:
> c=[/etc/kamailio/kamailio.cfg] l=525 a=27 n=set_dlg_profile
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:459]: ref dlg 0x7feb80ef0ae8 with 1 -> 2
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:461]: dialog id=28334339 found on entry 2161
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:621]: unref dlg 0x7feb80ef0ae8 with 1 -> 1
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:514]: ref dlg 0x7feb80ef0ae8 with 1 -> 2
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:517]: dialog callid='1560428909_26358995 at 4.55.13.227' found#012
> on entry 2161, dir=1
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: CRITICAL: dialog
> [dlg_hash.c:650]: bogus event 6 in state 1 for dlg 0x7feb80ef0ae8
> [2161:28334339] with clid '1560428909_26358995 at 4.55.13.227' and tags
> 'gK0251b91f' ''
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:808]: dialog 0x7feb80ef0ae8 changed from state 1 to state 1, due
> event 6 (ref 2)
> Jul 12 22:38:34 debian1 /usr/sbin/kamailio[25452]: DEBUG: dialog
> [dlg_hash.c:621]: unref dlg 0x7feb80ef0ae8 with 1 -> 1
>
>
> ### Hanging up now
>
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25456]: DEBUG: tm [uac.c:182]:
> DEBUG: dlg2hash: 29877
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25456]: DEBUG: tm [uac.c:182]:
> DEBUG: dlg2hash: 29874
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:514]: ref dlg 0x7feb80ef0ae8 with 1 -> 2
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:517]: dialog callid='1560428909_26358995 at 4.55.13.227' found#012
> on entry 2161, dir=1
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: CRITICAL: dialog
> [dlg_hash.c:650]: bogus event 7 in state 1 for dlg 0x7feb80ef0ae8
> [2161:28334339] with clid '1560428909_26358995 at 4.55.13.227' and tags
> 'gK0251b91f' ''
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:808]: dialog 0x7feb80ef0ae8 changed from state 1 to state 1, due
> event 7 (ref 2)
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:621]: unref dlg 0x7feb80ef0ae8 with 1 -> 1
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: ERROR: *** cfgtrace:
> c=[/etc/kamailio/kamailio.cfg] l=625 a=25 n=dlg_manage
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:459]: ref dlg 0x7feb80ef0ae8 with 1 -> 2
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:461]: dialog id=28334339 found on entry 2161
> Jul 12 22:38:46 debian1 /usr/sbin/kamailio[25455]: DEBUG: dialog
> [dlg_hash.c:621]: unref dlg 0x7feb80ef0ae8 with 1 -> 1
>
>
> Is my config wrong ? Am I missing anything here ? Any advice would be much
> appreciated
>
> Thank you,
> George
>
>
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--
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Seattle, USA, Sep 23-26, 2012 - http://asipto.com/u/katu
Kamailio Practical Workshop, Netherlands, Sep 10-12, 2012 - http://asipto.com/u/kpw
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