[OpenSIPS-Users] strange (?) loose_route() behaviour

[Bogdan-Andrei Iancu]

Hi Victor,

I think you are mixing 2 different concepts:

- SIP domain (used by domain module) and which has the meaning of domain 
to be locally served (a domain may be served by multiple SIP servers)
- IP of a server, as listener for SIP traffic

In opensips, RR module, to see if a Route hdr points to itself, checks 
the RR content both as IP (against local listeners) and as domain 
(against the domain table) - this last check is the one you do not have 
in kamilio.

Now, if you want your opensips not to handle the Y.Y.Y.Y ip as local, 
why do you place it in domain table ? make no sense as it is not its IP.

Regards,
Bogdan

On 10/01/2011 12:23 PM, Victor Gamov wrote:
> Hi All!
>
> I have the following situation with loose_route() which looks strange 
> for me.
>
> X.X.X.X is OpenSIPS-1.7.0
> Y.Y.Y.Y is next-hop SIP device
> Z.Z.Z.Z is SIP UAC
>
> The following ACK come to OpenSIPS
> --------------
> U 2011/10/01 00:54:49.046875 Z.Z.Z.Z:59343 -> X.X.X.X:5060
> ACK sip:123456789 at Y.Y.Y.Y:5080 SIP/2.0.
> Via: SIP/2.0/UDP 
> 192.168.0.114:5060;branch=z9hG4bK84de8ff6d771e53a8aee9afc7831780;rport.
> Route: <sip:X.X.X.X;lr;ftag=1406706537;did=107.420a00d5>.
> Route: <sip:Y.Y.Y.Y:5080;lr>.
> From: "myuser" <sip:myuser at mydomain>;tag=1406706537.
> To: 
> <sip:123456789 at mydomain;user=phone>;tag=265de77d7e20be8300f0e1c6014f1c57.
> Call-ID: 3234622210 at 192_168_0_114.
> CSeq: 3 ACK.
> Contact: <sip:myuser at 192.168.0.114:5060>.
> Content-Length: 0.
> --------------
>
>
> Then OpenSIPS do loose_route():
>
> --------------
> Oct  1 00:54:49 [80328] DBG:core:parse_headers: flags=200
> Oct  1 00:54:49 [80328] DBG:rr:is_preloaded: is_preloaded: No
> Oct  1 00:54:49 [80328] DBG:core:grep_sock_info: checking if host==us: 
> 12==12 &&  [Y.Y.Y.Y] == [X.X.X.X]
> Oct  1 00:54:49 [80328] DBG:core:grep_sock_info: checking if port 5060 
> matches port 5080
> Oct  1 00:54:49 [80328] DBG:core:grep_sock_info: checking if host==us: 
> 12==12 &&  [Y.Y.Y.Y] == [X.X.X.X]
> Oct  1 00:54:49 [80328] DBG:core:grep_sock_info: checking if port 5060 
> matches port 5080
> Oct  1 00:54:49 [80328] DBG:core:db_new_result: allocate 48 bytes for 
> result set at 0x6fe0a8
> Oct  1 00:54:49 [80328] DBG:db_mysql:db_mysql_get_columns: 1 columns 
> returned from the query
> Oct  1 00:54:49 [80328] DBG:core:db_allocate_columns: allocate 28 
> bytes for result columns at 0x6ff320
> Oct  1 00:54:49 [80328] DBG:db_mysql:db_mysql_get_columns: 
> RES_NAMES(0x6ff328)[0]=[domain]
> Oct  1 00:54:49 [80328] DBG:db_mysql:db_mysql_get_columns: use 
> DB_STRING result type
> Oct  1 00:54:49 [80328] DBG:core:db_allocate_rows: allocate 48 bytes 
> for result rows and values at 0x6fafe0
> Oct  1 00:54:49 [80328] DBG:db_mysql:db_mysql_str2val: converting 
> STRING [Y.Y.Y.Y]
> Oct  1 00:54:49 [80328] DBG:domain:is_domain_local: Realm 'Y.Y.Y.Y' is 
> local
> Oct  1 00:54:49 [80328] DBG:core:db_free_columns: freeing result 
> columns at 0x6ff320
> Oct  1 00:54:49 [80328] DBG:core:db_free_rows: freeing 1 rows
> Oct  1 00:54:49 [80328] DBG:core:db_free_row: freeing row values at 
> 0x6faff0
> Oct  1 00:54:49 [80328] DBG:core:db_free_rows: freeing rows at 0x6fafe0
> Oct  1 00:54:49 [80328] DBG:core:db_free_result: freeing result set at 
> 0x6fe0a8
> Oct  1 00:54:49 [80328] DBG:rr:after_strict: Next hop: 
> 'sip:X.X.X.X;lr;ftag=1406706537;did=107.420a00d5' is loose router
> Oct  1 00:54:49 [80328] DBG:core:parse_headers: flags=ffffffffffffffff
> Oct  1 00:54:49 [80328] DBG:rr:after_strict: The last route URI: 
> 'sip:Y.Y.Y.Y:5080;lr'
> Oct  1 00:54:49 [80328] DBG:rr:run_rr_callbacks: callback id 1 entered 
> with <>
> Oct  1 00:54:49 [80328] DBG:dialog:dlg_onroute: Route param 'did' not 
> found
>
> route[1]: METHOD=ACK; R-URI=sip:Y.Y.Y.Y:5080;lr; 
> du=sip:X.X.X.X;lr;ftag=1406706537;did=107.420a00d5; mf=2; bf=192; 
> ds=Contact: sip:Y.Y.Y.Y:5080;lr
> --------------
>
>
> If Y.Y.Y.Y is known as local domain from domain table, then 
> loose_route() decide to send ACK to himself
> I hope this request will be send to Y.Y.Y.Y because topmost Route 
> indicate this proxy and it will be removed and next Route will be used 
> to route request
>
>
> If Y.Y.Y.Y is NOT known as local domain (deleted from domain table) 
> then request routed properly
>
>
> Also, I try old kamailio-1.5.1 with this configuration and request 
> routed as expected by me
>
>
> Is this bug/feature or my misunderstood of loose_route (again?! :-) )
>
> Thanks!
>
>
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-- 
Bogdan-Andrei Iancu
OpenSIPS eBootcamp - 19th of September 2011
OpenSIPS solutions and "know-how"

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