[OpenSIPS-Users] Load balancer - how to not change origination ip

Bogdan-Andrei Iancu bogdan at voice-system.ro
Thu Jul 9 13:36:42 CEST 2009


Salut Gabriel,

It looks like there is a problem in how you process the CANCEL - do you 
do a t_relay() for the received CANCEL ? can you check this at network 
level if the received CANCEL is actually sent out to the callee part?

Regards,
Bogdan

Gabriel Georgescu wrote:
> Thank you for your advices!
>
> Regarding the second point I already have a record_route() like below 
> which does not help to disconnect ringing calls:
>     if (!has_totag()) {
>             # initial request
>             record_route();
>         }
> I also tried like this without success:
>         
> if
> (is_method("INVITE"))
>   
>                 record_route();
> I wonder if the creator of the tutorial had same disconnect problems 
> and how did he solved it...
>
> Looking into the trace there is a CANCEL received from softphone but 
> it is not propagated to the destination server:
>
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: 
> DBG:core:build_res_buf_from_sip_res: copied size: orig:108, new: 46, 
> rest: 700 msg=#012SIP/2.0 183 Session Progress#015#012CSeq: 1 
> INVITE#015#012Via: SIP/2.0/UDP 
> 192.168.1.36:13308;received=X.136.171.132;branch=z9hG4bK-d8754z-317a22388e1b1a23-1---d8754z-;rport=61425#015#012From: 
> "EyeBeamGG"<sip:Gabi at A.121.254.18>;tag=8a56554d#015#012Call-ID: 
> YzE5NjRmMzY4YWVlZDJhMGU5MjdmZTlhNTgxY2MzN2M.#015#012To: 
> "101"<sip:101 at A.121.254.18>;tag=0907290911276889507657541#015#012Contact: 
> <sip:A.121.254.201:5060;transport=udp>#015#012Content-Type: 
> application/sdp#015#012Content-Length: 229#015#012Record-Route: 
> <sip:A.121.254.18;lr;ftag=8a56554d;did=0a8.698c41a>#015#012#015#012v=0#015#012o=VoipSwitch 
> 8540 8540 IN IP4 A.121.254.201#015#012s=VoipSIP#015#012i=Audio 
> Session#015#012c=IN IP4 A.121.254.201#015#012t=0 0#015#012m=audio 7540 
> RTP/AVP 18 101#015#012a=rtpmap:18 G729/8000/1#015#012a=rtpmap:101 
> telephone-event/8000#015#012a=fmtp:101 0-15#015#012a=sendrecv#015#012
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: 
> DBG:tm:run_trans_callbacks: trans=0xb5c31df8, callback type 128, id 0 
> entered
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: 
> DBG:dialog:next_state_dlg: dialog 0xb5c31c58 changed from state 2 to 
> state 2, due event 2
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: DBG:tm:relay_reply: 
> sent buf=0x816c2d8: SIP/2.0 1..., shmem=0xb5c344b8: SIP/2.0 1
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: DBG:tm:set_timer: 
> relative timeout is 120
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: 
> DBG:tm:insert_timer_unsafe: [1]: 0xb5c31f60 (200)
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: DBG:tm:t_unref: 
> UNREF_UNSAFE: after is 0
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: 
> DBG:core:destroy_avp_list: destroying list (nil)
> Jul  9 12:19:34 sippc /usr/sbin/opensips[32132]: DBG:core:receive_msg: 
> cleaning up
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_msg: 
> SIP Request:
> *Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_msg:  
> method:  <CANCEL>
> *Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_msg:  
> uri:     <sip:101 at A.121.254.18>
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_msg:  
> version: <SIP/2.0>
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_headers: flags=2
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_via_param: found param type 232, <branch> = 
> <z9hG4bK-d8754z-317a22388e1b1a23-1---d8754z->; state=6
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_via_param: found param type 235, <rport> = <n/a>; state=17
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_via: 
> end of header reached, state=5
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_headers: via found, flags=2
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_headers: this is the first via
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:receive_msg: 
> After parse_msg...
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:receive_msg: 
> preparing to run routing scripts...
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_headers: flags=100
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_to: 
> end of header reached, state=10
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_to: 
> display={"101"}, ruri={sip:101 at A.121.254.18}
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:get_hdr_field: <To> [30]; uri=[sip:101 at A.121.254.18]
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:get_hdr_field: to body ["101"<sip:101 at A.121.254.18>#015#012]
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:get_hdr_field: cseq <CSeq>: <1> <CANCEL>
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:get_hdr_field: content_length=0
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:get_hdr_field: found end of header
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:maxfwd:is_maxfwd_present: max_forwards header not found!
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:uri:has_totag: no 
> totag
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_to_param: tag=8a56554d
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_to: 
> end of header reached, state=29
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:parse_to: 
> display={"EyeBeamGG"}, ruri={sip:Gabi at A.121.254.18}
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_headers: flags=78
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:tm:t_lookupOriginalT: searching on hash entry 18783
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:tm:matching_3261: 
> RFC3261 transaction matched, tid=-d8754z-317a22388e1b1a23-1---d8754z-
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:tm:t_lookupOriginalT: canceled transaction found (0xb5c31df8)!
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:tm:t_lookupOriginalT: REF_UNSAFE: after is 1
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:tm:t_lookupOriginalT: t_lookupOriginalT completed
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:parse_headers: flags=ffffffffffffffff
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:check_via_address: params X.136.171.132, 192.168.1.36, 0
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:sl:run_sl_callbacks: callback id 0 entered
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:siptrace:trace_sl_onreply_out: trace off...
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:tm:t_unref_cell: 
> UNREF_UNSAFE: after is 0
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: 
> DBG:core:destroy_avp_list: destroying list (nil)
> Jul  9 12:19:39 sippc /usr/sbin/opensips[32132]: DBG:core:receive_msg: 
> cleaning up
>
>
> At 12:26 AM 7/9/2009, you wrote:
>> 2009/7/8 Gabriel Georgescu <gabrielgeo99 at gmail.com>:
>> > 1. the call arrives at the windows machine with the origination IP
>> > changed to the opensips ip, which makes billing impossible on
>> > windows. In my scenario opensips should only forward/distribute calls
>> > in the simplest way without altering origination ip.
>> >    Is there any method to forward the origination IP when doing 
>> load_balance?
>>
>> That's impossible, but you can do 2 things if you're billing by ip. 
>> Either:
>> - extract the original ip from the Via headers at the next hop, or
>> - do something like append_hf("Orig-IP", "$si"); to append the ip as a
>> new header - the call may be a bit different - check the documentation
>>
>> > 2. a ringing call is not disconnected if the origination party 
>> hangs up.
>> >    I think it misses a treatement for BYE sent from origination
>> > while call is in "connecting" state.
>> >    Any clues how to correct this?
>>
>> Try adding record_route() on an INVITE packet - that way, the rest of
>> the dialog will be passed through your proxy too.
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