[SR-Users] Kamailio - Separated Servers
Bruno Emer
brunoemer at gmail.com
Wed Sep 24 19:46:23 CEST 2014
Hello Nick!
I'm still learning more about Kamailio and how it works. This is being a
lil bit hard to me because I don't understand too much about programming
and all those "if's" and "else's", but I'll be happy to help you and
provide you the information that I used to have y scenario working fine.
I spent a lot of time to have this scenario up and running in the way that
I need, but here are the main documentation which I used:
This link here explain how to have Registrar and Proxy in different
servers. It helped me a lot to understand the message flow between the
servers:
http://www.kamailio.org/dokuwiki/doku.php/tutorials:openser-modular-install
This here, shows how to enable the websockets in Kamailio. I think that is
a good point to start:
http://nil.uniza.sk/sip/kamailio/configuring-kamailio-4x-websocket
Here I found a good example that shows how to have an Edge Proxy with
websockets support:
https://github.com/kamailio/kamailio/blob/master/examples/outbound/edge_websocket.cfg
So, I got a mix of information and a lot of attempts and errors.
BTW, many thanks to Daniel and Frank Carmickle that helped me a lot with my
questions!
If you need more help, please let me know!
:-)
*Bruno Emer*
Mobile: +55 11 96540-0044
email: brunoemer at gmail.com
<https://www.facebook.com/bruno.emer.5>
<https://www.linkedin.com/profile/view?id=86461237&trk=spm_pic>
<https://twitter.com/brunoemer_>
<https://www.flickr.com/photos/122070309@N03/>
<http://google.com/+BrunoEmer> <http://instagram.com/brunoemer_>
2014-09-24 10:52 GMT-03:00 Bruno Emer <brunoemer at gmail.com>:
> Thanks again for your help, Daniel!
>
> Now my scenario is working!
> I have two Edge Proxies and a single Registrar server pointing to a
> external PostgreSQL database.
>
> My two users (alice and bob) are authenticated each one in a Edge Proxy
> and I can start a session between then using WebSockets. I'm using WebRTC
> (JSSIP) as a client to start the calls.
>
> :-)
>
>
>
>
>
> *Bruno Emer*
>
> Mobile: +55 11 96540-0044
> email: brunoemer at gmail.com
> <https://www.facebook.com/bruno.emer.5>
> <https://www.linkedin.com/profile/view?id=86461237&trk=spm_pic>
> <https://twitter.com/brunoemer_>
> <https://www.flickr.com/photos/122070309@N03/>
> <http://google.com/+BrunoEmer> <http://instagram.com/brunoemer_>
>
> 2014-09-23 18:07 GMT-03:00 Bruno Emer <brunoemer at gmail.com>:
>
> Hello Guys!
>>
>> Good news about my tests here!
>> I found some configurations relative to Outbound proxy and I get this
>> working. Now, I can have two outbound proxies, one registrar and one
>> database. I can register one user in the Outbound Proxy1 and one user in
>> Outbound Proxy 2 and place a call between these users.
>>
>> But now I'm facing another problem! The ACK messages are not being
>> delivered, so the session is being dropped after a few seconds. I think
>> that the problem is in the Contact field. Trying to investigate it now!
>>
>> I'm not sure about how to change the message to deliver the ACK. Did
>> someone had this problem before?
>>
>> In anycase, here is the routing configuration that I'm using in my
>> Oubound proxy:
>>
>>
>> request_route {
>> if (($Rp == MY_WS_PORT || $Rp == MY_WSS_PORT)
>> && !(proto == WS || proto == WSS)) {
>> xlog("L_WARN", "SIP request received on $Rp\n");
>> sl_send_reply("403", "Forbidden");
>> exit;
>> }
>>
>> route(REQINIT);
>>
>> if (is_method("CANCEL")) {
>> if (t_check_trans()) {
>> route(RELAY);
>> }
>> exit;
>> }
>>
>> route(WITHINDLG);
>>
>> t_check_trans();
>>
>> if (is_method("REGISTER")) {
>> remove_hf("Route");
>> add_path();
>> $du = "sip:REGISTRAR_IP:REGISTRAR_PORT";
>> } else {
>> if (is_method("INVITE|SUBSCRIBE|ACK"))
>> record_route();
>>
>> if (@via[2] == "") {
>> # From client so route to registrar...
>>
>> if ($rU == $null) {
>> sl_send_reply("484", "Address Incomplete");
>> exit;
>> }
>> remove_hf("Route");
>> $du = "sip:REGISTRAR_IP:REGISTRAR_PORT";
>> } else {
>> # From registrar so route using "Route:" headers...
>>
>> if (!loose_route()) {
>> switch($rc) {
>> case -2:
>> sl_send_reply("403", "Forbidden");
>> exit;
>> default:
>> xlog("L_ERR", "in request_route\n");
>> sl_reply_error();
>> exit;
>> }
>> }
>>
>> t_on_failure("FAIL_OUTBOUND");
>> }
>> }
>>
>> route(RELAY);
>> }
>>
>> route[RELAY] {
>> if (!t_relay()) {
>> sl_reply_error();
>> }
>> exit;
>> }
>>
>> route[REQINIT] {
>> if (!mf_process_maxfwd_header("10")) {
>> sl_send_reply("483","Too Many Hops");
>> exit;
>> }
>>
>> if(!sanity_check("1511", "7"))
>> {
>> xlog("Malformed SIP message from $si:$sp\n");
>> exit;
>> }
>> }
>>
>> route[WITHINDLG] {
>> if (has_totag()) {
>> if (!loose_route()) {
>> switch($rc) {
>> case -2:
>> sl_send_reply("403", "Forbidden");
>> exit;
>> default:
>> if (is_method("ACK")) {
>> if ( t_check_trans() ) {
>> record_route();
>> route(RELAY);
>> exit;
>> } else {
>> exit;
>> }
>> }
>> sl_send_reply("404","Not Found");
>> }
>> } else {
>> if (is_method("NOTIFY")) {
>> record_route();
>> }
>> route(RELAY);
>> }
>> exit;
>> }
>> }
>>
>> onreply_route {
>> if (($Rp == MY_WS_PORT || $Rp == MY_WSS_PORT)
>> && !(proto == WS || proto == WSS)) {
>> xlog("L_WARN", "SIP response received on $Rp\n");
>> drop;
>> }
>>
>> if (!t_check_trans()) {
>> drop;
>> }
>>
>> if ($rm == "REGISTER" && $rs >= 200 && $rs <= 299) {
>> remove_hf("Flow-Timer");
>> if ($(hdr(Require)[*])=~"outbound")
>> insert_hf("Flow-Timer: FLOW_TIMER\r\n", "Call-ID");
>> }
>> }
>>
>> failure_route[FAIL_OUTBOUND] {
>> if (t_branch_timeout() || !t_branch_replied()) {
>> send_reply("430", "Flow Failed");
>> }
>> }
>>
>> event_route[xhttp:request] {
>> set_reply_close();
>> set_reply_no_connect();
>>
>> if ($Rp != MY_WS_PORT
>> #!ifdef WITH_TLS
>> && $Rp != MY_WSS_PORT
>> #!endif
>> ) {
>> xlog("L_WARN", "HTTP request received on $Rp\n");
>> xhttp_reply("403", "Forbidden", "", "");
>> exit;
>> }
>>
>> xlog("L_DBG", "HTTP Request Received\n");
>>
>> if ($hdr(Upgrade)=~"websocket"
>> && $hdr(Connection)=~"Upgrade"
>> && $rm=~"GET") {
>>
>> # Validate Host - make sure the client is using the correct
>> # alias for WebSockets
>> if ($hdr(Host) == $null || !is_myself("sip:" + $hdr(Host))) {
>> xlog("L_WARN", "Bad host $hdr(Host)\n");
>> xhttp_reply("403", "Forbidden", "", "");
>> exit;
>> }
>>
>> # Optional... validate Origin - make sure the client is from an
>> # authorised website. For example,
>> #
>> # if ($hdr(Origin) != "http://communicator.MY_DOMAIN"
>> # && $hdr(Origin) != "https://communicator.MY_DOMAIN") {
>> # xlog("L_WARN", "Unauthorised client $hdr(Origin)\n");
>> # xhttp_reply("403", "Forbidden", "", "");
>> # exit;
>> # }
>>
>> # Optional... perform HTTP authentication
>>
>> # ws_handle_handshake() exits (no further configuration file
>> # processing of the request) when complete.
>> if (ws_handle_handshake())
>> {
>> # Optional... cache some information about the
>> # successful connection
>> exit;
>> }
>> }
>>
>> xhttp_reply("404", "Not Found", "", "");
>> }
>>
>> event_route[websocket:closed] {
>> xlog("L_INFO", "WebSocket connection from $si:$sp has closed\n");
>> }
>>
>>
>>
>>
>> Thanks again!!!
>>
>>
>>
>> *Bruno Emer*
>>
>> Mobile: +55 11 96540-0044
>> email: brunoemer at gmail.com
>> <https://www.facebook.com/bruno.emer.5>
>> <https://www.linkedin.com/profile/view?id=86461237&trk=spm_pic>
>> <https://twitter.com/brunoemer_>
>> <https://www.flickr.com/photos/122070309@N03/>
>> <http://google.com/+BrunoEmer> <http://instagram.com/brunoemer_>
>>
>> 2014-09-22 12:40 GMT-03:00 Bruno Emer <brunoemer at gmail.com>:
>>
>> Hi, Daniel and Frank!
>>>
>>> Thanks for your support!
>>> Now, I changed my scenario just a lil bit to make it easy to understand
>>> and deploy. I'm doing the following:
>>>
>>> 1. Created a server using the "Outbound" module configuration
>>> example, but add WebSocket support in it. (IP Address 192.168.1.16)
>>> 2. Created a server running as Proxy and Registrar with WebSockets
>>> support. (IP Address 192.168.1.15)
>>> 3. Registered two users (bob and alice at enterprise.com) using WebRTC.
>>> These users sent they Register requests to the Oubount server
>>> (192.168.1.16).
>>> 4. I'm also using an external postgres database to store the user
>>> informations. In my proxy/registrar server, I've configurated
>>> "modparam("usrloc", "db_mode", 3)", so it will not store data in memory.
>>>
>>>
>>> After register the users in my scenario, I can see the following
>>> information stored in my database (output of kamctl db show location):
>>>
>>> id | ruid | username | domain |
>>> contact | received | path |
>>> expires | q | callid | cseq | last_modified |
>>> flags | cflags | user_agent | socket | methods |
>>> instance | reg_id
>>>
>>> -----+----------------------+----------+----------------+------------------------------------------------+-----------------------+------+---------------------+----+------------------------+------+---------------------+-------+--------+-------------------+---------------------+---------+-------------------------------------------------+--------
>>> 277 | uloc-54203f71-10bd-2 | alice | enterprise.com |
>>> sip:v4s0prah at o35ctmdnnruv.invalid;transport=ws | sip:192.168.1.16:5060
>>> | | 2014-09-22 15:31:21 | -1 | udb4shpe4dnm1jsl6016s5 | 82 |
>>> 2014-09-22 15:26:21 | 0 | 0 | JsSIP 0.4.0-devel | udp:
>>> 192.168.1.15:80 | 783 |
>>> <urn:uuid:75c837d1-740a-4c62-baa0-56a06149699e> | 1
>>> 278 | uloc-54203f71-10bc-2 | bob | enterprise.com |
>>> sip:lr78s270 at 0mkf6fgtprlh.invalid;transport=ws | sip:192.168.1.16:5060
>>> | | 2014-09-22 15:34:02 | -1 | 5mpl9q4bkuqsnpk8r316j5 | 82 |
>>> 2014-09-22 15:29:02 | 0 | 0 | JsSIP 0.4.0-devel | udp:
>>> 192.168.1.15:80 | 783 |
>>> <urn:uuid:e92ef911-1ae4-45b1-bfc9-b5752b0f2fe1> | 1
>>>
>>>
>>> So, I can assume that both users are registered and ready to start
>>> sessions.
>>>
>>> Now, when I try to start a new session between then (let's say bob
>>> calling alice) what I get in the endpoint is the following message:
>>>
>>> SIP/2.0 500 I'm terribly sorry, server error occurred (1/SL)
>>> Via: SIP/2.0/WS
>>> 0mkf6fgtprlh.invalid;rport=33154;received=192.168.1.11;branch=z9hG4bK7711221
>>> To: <sip:alice at enterprise.com>;tag=94c1b96a0e6eb467885b5057e1e49f9e.1970
>>> From: <sip:bob at enterprise.com>;tag=on056iipql
>>> Call-ID: 5e1pmj2fppbgg13doi4k
>>> CSeq: 3989 INVITE
>>> Server: kamailio (4.1.5 (x86_64/linux))
>>> Content-Length: 0
>>>
>>> What I understood about this problem is that the Proxy server is trying
>>> to forward the INVITE to the Outbound server and this server does not know
>>> that to do with this message - like forward it to alice.
>>>
>>> I'm stucked in this step.
>>>
>>> Here you can find the configuration files that I'm using:
>>>
>>> Outbound Server:
>>> https://mega.co.nz/#!Wlw2RL7S!G2YOP-1QbSCeNQddaAe3kyQMqz8yteZlZsAUpjZX4v4
>>>
>>> Proxy Server:
>>> https://mega.co.nz/#!qxAXTbbb!4zBjRtmADdl3rPCN2Yidd3xnZEjFahW3GSMb00w41xc
>>>
>>>
>>>
>>> Thanks again!
>>>
>>> Bruno Emer
>>>
>>>
>>>
>>> *Bruno Emer*
>>>
>>> Mobile: +55 11 96540-0044
>>> email: brunoemer at gmail.com
>>> <https://www.facebook.com/bruno.emer.5>
>>> <https://www.linkedin.com/profile/view?id=86461237&trk=spm_pic>
>>> <https://twitter.com/brunoemer_>
>>> <https://www.flickr.com/photos/122070309@N03/>
>>> <http://google.com/+BrunoEmer> <http://instagram.com/brunoemer_>
>>>
>>> 2014-09-18 18:04 GMT-03:00 Bruno Emer <brunoemer at gmail.com>:
>>>
>>> Ok, Daniel!
>>>>
>>>> I am trying exactly what you said, but for some reason the proxy server
>>>> can't forward the message back to the WebSocket server. I am getting
>>>> "487 Unresolvable destination". Appears that my Proxy Server can't get data
>>>> from usrloc.
>>>>
>>>> When I register an user using WebRTC I can see that the system stores
>>>> the information in kamailio database and in the field "contact" it puts a
>>>> string. The Proxy server is looking in database and just find this
>>>> information. Actually, I'm trying to understand the entire process that
>>>> envolves passing information from an Edge Server to a Proxy server that
>>>> sends the Register information to another Registrar server (as I described
>>>> before). The database is shared between all the servers, and they are in
>>>> the same network.
>>>>
>>>> I just read the information in another topic, as you said, but I think
>>>> that my case is a lil bit different from it. I you agree, I can post my
>>>> configuration files here. Maybe this can help another users with the same
>>>> problem!
>>>>
>>>> Thanks again!!!
>>>>
>>>>
>>>>
>>>> *Bruno Emer*
>>>>
>>>> Mobile: +55 11 96540-0044
>>>> email: brunoemer at gmail.com
>>>> <https://www.facebook.com/bruno.emer.5>
>>>> <https://www.linkedin.com/profile/view?id=86461237&trk=spm_pic>
>>>> <https://twitter.com/brunoemer_>
>>>> <https://www.flickr.com/photos/122070309@N03/>
>>>> <http://google.com/+BrunoEmer> <http://instagram.com/brunoemer_>
>>>>
>>>> 2014-09-17 9:13 GMT-03:00 Bruno Emer <brunoemer at gmail.com>:
>>>>
>>>> Hello!
>>>>>
>>>>> I am relatively new to Kamailio and I'm trying to create a new
>>>>> enviroment using it in my company. I am thinking about use Amazon to host
>>>>> the servers and use OpsWorks to automatically escalate then if necessary.
>>>>> To accomplish this, my idea is to separate the servers, using one dedicated
>>>>> server to run as WebSocket, one to run as proxy and one as a Registrar.
>>>>> I'll be using just one database to store informations to all of my servers.
>>>>> With this, if I need more resources later, I can just create new servers
>>>>> with the specific roles (WebSockets, Proxy, Registrar).
>>>>>
>>>>> By now, the idea is clear, but the point is that I don't know how to
>>>>> separate the WebSockets server from the proxy server. Actually, I can do
>>>>> this, but when I have one agent using a regular softphone and one agent
>>>>> using WebSockets (with JSSIP) they are not able to establish a session if
>>>>> the softphone user starts it. Now, I want to know if is there a way to use
>>>>> two websockets servers, register users using both of then and start
>>>>> sessions between then, with a separated proxy and registrar.
>>>>>
>>>>> Has anyone done this before? Is possible to use kamailio like this?
>>>>>
>>>>>
>>>>> Thanks.
>>>>>
>>>>>
>>>>>
>>>>> *Bruno Emer*
>>>>>
>>>>> Mobile: +55 11 96540-0044
>>>>> email: brunoemer at gmail.com
>>>>> <https://www.facebook.com/bruno.emer.5>
>>>>> <https://www.linkedin.com/profile/view?id=86461237&trk=spm_pic>
>>>>> <https://twitter.com/brunoemer_>
>>>>> <https://www.flickr.com/photos/122070309@N03/>
>>>>> <http://google.com/+BrunoEmer> <http://instagram.com/brunoemer_>
>>>>>
>>>>
>>>>
>>>
>>
>
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