[SR-Users] remove_hf_value

Slava Bendersky volga629 at networklab.ca
Sun Mar 22 18:32:33 CET 2015 

Hello Daniel, 
I end up insert routes like this. And right now on client side I see only public ip route and private side only private ip routes. 

route[ROUTE_HDR_ORG] { 
# Getting record routes 
if(is_present_hf("Route")) { 
xlog("L_INFO", "[$rm], Inbound connection from <$si>\n"); 
if(is_method("NOTIFY")) { 
if(is_ip_rfc1918($si)) { 
xlog("L_INFO", "[$rm], Present Route: $(route_uri{uri.host})\n"); 
remove_hf("Route"); 
insert_hf("Record-Route: <"sip" + $sel(cfg_get.kamailio.bindpublicip) + ":" $sel(cfg_get.kamailio.bindpublicport);transport=tcp;lr=on;ftag=$ft;nat=yes>\r\n"); 
$fs = "tcp" + ":" + $sel(cfg_get.kamailio.bindpublicip) + ":" + $sel(cfg_get.kamailio.bindpublicport); 
} else { 
xlog("L_INFO", "[$rm], Present Route: $(route_uri{uri.host})\n"); 
remove_hf("Route"); 
insert_hf("Record-Route: <"sip" + ":" $sel(cfg_get.kamailio.bindip) + ":" + $sel(cfg_get.kamailio.bindport);lr=on;ftag=$ft;nat=yes>\r\n"); 
$fs = "udp" + ":" + $sel(cfg_get.kamailio.bindip) + ":" + $sel(cfg_get.kamailio.bindport); 
} 
} 
} 
} 

And for initial SUBSCRIBE INVITE 

if (is_method("INVITE|SUBSCRIBE")) { 
remove_hf("Route"); 
insert_hf("Record-Route: <"sip" + ":" + $sel(cfg_get.kamailio.bindip) + ":" + $sel(cfg_get.kamailio.bindport);lr=on;ftag=$ft;nat=yes>\r\n"); 
#record_route(); 
} 


Slava. 


From: "Daniel-Constantin Mierla" <miconda at gmail.com> 
To: "Slava Bendersky" <volga629 at networklab.ca>, "sr-users" <sr-users at lists.sip-router.org> 
Sent: Wednesday, March 18, 2015 4:15:28 AM 
Subject: Re: [SR-Users] remove_hf_value 

Hello, 

but the INVITE request goes out with 2 Record Route headers, if you get them in the 200ok. 

Not sure how it is going to work overall, you will have to manually set local sockets for requests within dialog, because you are doing also trasport layer gatewaying (tcp-udp). 

Anyhow, as a solution, maybe you should just not be using record_route() function and just add the header with insert_hf() for the invite, remove the Record-Route header for 200ok with remove_hf() and insert a new one again with insert_hf() 

If you know the local address (IP/port/transport) you want to put in the Record-Route, you can build the header as: 

insert_hf("Record-Route: <sip:_LOCAL_IP_:_LOCAL_PORT_;transport=_LOCAL_TRANSPORT_;lr=on;ftag=$ft;nat=yes> \r\n"); 

Requests within the dialog can be handled with loose_route(), but again, you have to do more in config for selecting the local socket to send to next hop. 

Cheers, 
Daniel 

On 16/03/15 13:35, Slava Bendersky wrote: 



Hello Daniel, 
I want do clean up on routes from first SUBSCRIBE, that when traffic goes to public side of kamailio will be only public route and when traffic is internal the Record-Route will stay internal only. In SDP I see like this. 
I tired double routes set 0 in rr, but didn't clean enough. 

<--- Transmitting (NAT) to 10.18.130.46:5060 ---> 
SIP/2.0 200 OK 
Via: SIP/2.0/UDP 10.18.130.46;branch=z9hG4bKf852.e0223f39c2bbad8366fdf1b7cb22b336.0;i=8;received=10.18.130.46;rport=5060 
Via: SIP/2.0/TCP 192.168.88.252:5062;received=client_pub_ipbranch=z9hG4bK0bbe1f7d27257bba9;rport=5062 
Record-Route: <sip:10.18.130.46;r2=on;lr=on;ftag=a185d974ec;nat=yes> On public side remote this Record-Route 
Record-Route: <sip:kamailio_pub_ip:5084;transport=tcp;r2=on;lr=on;ftag=a185d974ec;nat=yes> On private side remote this Record-Route 
From: "Slava Bendersky" <sips:10101 at networklab.ca> ;tag=a185d974ec 
To: <sips:10101 at networklab.ca> ;tag=as00757d3e 
Call-ID: b08adb1ad1804a83 
CSeq: 236711034 SUBSCRIBE 
Server: FPBX-2.11.0(11.15.1) 
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE 
Supported: replaces, timer 
Expires: 3600 
Contact: <sip:10101 at 10.18.130.50:5060> ;expires=3600 
Content-Length: 0 


Slava. 


From: "Daniel-Constantin Mierla" <miconda at gmail.com> 
To: "sr-users" <sr-users at lists.sip-router.org> 
Sent: Monday, March 16, 2015 7:01:54 AM 
Subject: Re: [SR-Users] remove_hf_value 

Hello, 

can you give an example of incoming header and how you want to be after modification? 

It is not clear for me what end result you want/expect. 

Cheers, 
Daniel 

On 14/03/15 06:41, Slava Bendersky wrote: 

BQ_BEGIN

Hello Everyone, 
Here updated version. Trying remove Record-Route after the coma. 
My log shows 

Mar 14 01:25:21 canlvprx01 /usr/sbin/kamailio[751]: INFO: <script>: [SUBSCRIBE], Inbound connection from <Client Public IP> 
Mar 14 01:25:21 canlvprx01 /usr/sbin/kamailio[751]: ERROR: <script>: <null> 
Mar 14 01:25:21 canlvprx01 /usr/sbin/kamailio[751]: INFO: <script>: [SUBSCRIBE], Route for removal: '<null>' 

route snippet. 

route[ROUTE_HDR_ORG] { 
# Getting record routes 
if(is_present_hf("Route")) { 
xlog("L_INFO", "[$rm], Inbound connection from <$si>\n"); 
if(is_method("SUBSCRIBE")) { 
if(is_ip_rfc1918($si)) { 
xlog( "$sel(@hf_value.Record_Route[-1])" ); 
xlog("L_INFO", "[$rm], Route for removal: '$sel(@hf_value.Record_Route[-1])'\n"); 
remove_hf_value("Record-Route[-1]"); 
} else { 
xlog( "$sel(@hf_value.Record_Route[1])" ); 
xlog("L_INFO", "[$rm], Route for removal: '$sel(@hf_value.Record_Route[1])'\n"); 
remove_hf_value("Record-Route[1]"); 
} 
} 
} 
return; 
} 


Slava, 

From: "Slava Bendersky" <volga629 at networklab.ca> 
To: "sr-users" <sr-users at lists.sip-router.org> 
Sent: Friday, March 13, 2015 1:00:44 PM 
Subject: [SR-Users] remove_hf_value 

Hello Everyone, 
I am trying adjust Record-Route, but can't match headers value 

And I am call route(ROUTE_HDR_ORG); right after route(WITHINDLG); 

route[ROUTE_HDR_ORG] { 
# Getting record routes 
if(is_present_hf("Record-Route")) { 
if(is_method("SUBSCRIBE")) { 
xlog( "$sel(@hf_value.Record_Route[1])" ); 
xlog("L_INFO", "[$rm], Route for removal: '$sel(@hf_value.Record_Route[1])'\n"); 
remove_hf_value("Record-Route[1]"); 
} 
} 
return; 
} 

Any help Thank you, 
Slava. 

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_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users at lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users 



-- 
Daniel-Constantin Mierla http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio World Conference, May 27-29, 2015
Berlin, Germany - http://www.kamailioworld.com 

_______________________________________________ 
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list 
sr-users at lists.sip-router.org 
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users 

BQ_END

-- 
Daniel-Constantin Mierla http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda Kamailio World Conference, May 27-29, 2015
Berlin, Germany - http://www.kamailioworld.com 

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