[Users] Re: OpenSER as a Load Balancer for Asterisk and RE-INVITEs
Edoardo Serra
edoardo.serra at webrainstorm.it
Sun Mar 25 21:14:48 CEST 2007
Christian Schlatter ha scritto:
> The call hold RE-INVITE issued by the called UA should include an R-URI
> including the contact address of the GW who initiated the SIP call. So
> if a call comes from asterisk.1 the RE-INVITE should include a R-URI
> like "INVITE sip:ip.of.asterisk.1" (depending of what asterisk.1 puts in
> its contact header).
>
> In your script you always call ds_select_dst and the RE-INVITEs get
> routed to a destination from the dispatcher destination set instead of
> using the R-URI to route the call to the correct GW.
You're right, looking better at the script our loose-route processing
doesn't make sense.
I'm wondering which was its intended meaning....
Tnx for your suggestion it looks good and works like a charm !
Regards
Edoardo
> Since you record route each request you could test if the following works:
>
> > # loose-route processing
> > if (loose_route()) {
> > # mark routing logic in request
> > append_hf("P-hint: rr-enforced\r\n");
> >
> > # don't do ds_select_dst here since the R-URI
> > # of RE-INVITEs should
> > # contain the correct GW address
> > t_relay();
> > exit;
> > };
>
>
> Christian
>
>>
>> Tnx in advance for help
>>
>> Edoardo
>>
>> My openser.cfg follows
>>
>> # $Id: ser.cfg,v 1.21.4.1 2003/11/10 15:35:15 andrei Exp $
>> # ----------- global configuration parameters ------------------------
>>
>> check_via=yes # (cmd. line: -v)
>> dns=no # (cmd. line: -r)
>> rev_dns=no # (cmd. line: -R)
>> fifo="/tmp/ser_fifo"
>>
>> #uid=nobody
>> #gid=nobody
>>
>> # ------------------ module loading ----------------------------------
>> loadmodule "/usr/lib/openser/modules/sl.so"
>> loadmodule "/usr/lib/openser/modules/tm.so"
>> loadmodule "/usr/lib/openser/modules/rr.so"
>> loadmodule "/usr/lib/openser/modules/maxfwd.so"
>> loadmodule "/usr/lib/openser/modules/usrloc.so"
>> loadmodule "/usr/lib/openser/modules/registrar.so"
>> loadmodule "/usr/lib/openser/modules/nathelper.so"
>> loadmodule "/usr/lib/openser/modules/textops.so"
>> loadmodule "/usr/lib/openser/modules/exec.so"
>> loadmodule "/usr/lib/openser/modules/uri.so"
>> loadmodule "/usr/lib/openser/modules/uri_db.so"
>> loadmodule "/usr/lib/openser/modules/dispatcher.so"
>> loadmodule "/usr/lib/openser/modules/mysql.so"
>> loadmodule "/usr/lib/openser/modules/auth.so"
>> loadmodule "/usr/lib/openser/modules/auth_db.so"
>>
>> modparam("usrloc", "db_mode", 2)
>> modparam("usrloc", "db_url",
>> "mysql://user:pass@192.168.252.5/openser")
>> modparam("usrloc", "timer_interval", 120)
>> modparam("auth_db", "calculate_ha1", 0)
>> modparam("auth_db", "db_url",
>> "mysql://user:pass@192.168.252.5/db")
>> modparam("uri_db", "db_url",
>> "mysql://user:pass@192.168.252.5/openser")
>> modparam("rr", "enable_full_lr", 1)
>> modparam("registrar", "nat_flag", 6)
>> modparam("registrar", "max_expires", 3600)
>> modparam("registrar", "min_expires", 60)
>> modparam("registrar", "append_branches", 0)
>> modparam("registrar", "desc_time_order", 1)
>> modparam("nathelper", "natping_interval", 20) # Ping interval 20 s
>> modparam("nathelper", "ping_nated_only", 1) # Ping only clients
>> behind NAT
>> modparam("dispatcher", "force_dst", 1)
>>
>> # ------------------------- request routing logic -------------------
>> # main routing logic
>>
>> route{
>> if (!mf_process_maxfwd_header("10")) {
>> sl_send_reply("483","Too Many Hops");
>> exit;
>> };
>> if ( msg:len > max_len ) {
>> sl_send_reply("513", "Message too big");
>> exit;
>> };
>>
>> if ( (method=="OPTIONS") || (method=="SUBSCRIBE") ||
>> (method=="NOTIFY") ) {
>> sl_send_reply("405", "Method Not Allowed");
>> exit;
>> }
>>
>> if (!method=="REGISTER") {
>> record_route();
>> };
>>
>>
>> if ((src_ip==ip.of.asterisk.1) || (src_ip==ip.of.asterisk.1)) {
>> if (!lookup("location")) {
>> sl_send_reply("486", "Busy here");
>> exit;
>> };
>> if (!t_relay()) {
>> sl_reply_error();
>> };
>> exit;
>> };
>>
>> if (nat_uac_test("3")) {
>> if ((method=="REGISTER") || (method=="INVITE") ||
>> (method=="OPTIONS")) {
>> fix_nated_contact();
>> force_rport();
>> setflag(6); # Mark as NATed
>> }
>> }
>>
>> if (method=="REGISTER") {
>> if (!proxy_authorize("exorsa", "openser_view")) {
>> proxy_challenge("exorsa", "0");
>> exit;
>> }
>> if (!check_to()) {
>> sl_send_reply("403", "Digest username and URI
>> username do NOT match! Stay away!");
>> exit;
>> }
>>
>> save("location");
>>
>> exit;
>> };
>>
>>
>> if (method=="INVITE") {
>> if (!proxy_authorize("exorsa", "openser_view")) {
>> proxy_challenge("exorsa", "0");
>> exit;
>> }
>>
>> if (!check_from()) {
>> sl_send_reply("403", "Digest username and URI username do
>> NOT match! Stay away!");
>> exit;
>> }
>> }
>>
>> # loose-route processing
>> if (loose_route()) {
>> # mark routing logic in request
>> append_hf("P-hint: rr-enforced\r\n");
>> route(1);
>> exit;
>> };
>>
>> if (!uri==myself) {
>> # mark routing logic in request
>> append_hf("P-hint: outbound\r\n");
>> route(1);
>> exit;
>> };
>>
>> append_hf("P-hint: usrloc applied\r\n");
>> route(1);
>> }
>>
>> route[1]
>> {
>> # !! Nathelper
>> if (uri=~"[@:](192\.168\.|10\.|172\.(1[6-9]|2[0-9]|3[0-1])\.)"
>> && !search("^Route:")){
>> sl_send_reply("479", "We don't forward to private IP
>> addresses");
>> exit;
>> };
>>
>> # NAT processing of replies; apply to all transactions (for
>> example,
>> # re-INVITEs from public to private UA are hard to identify as
>> # NATed at the moment of request processing); look at replies
>> t_on_reply("1");
>>
>> if ((src_ip!=ip.of.asterisk.1) && (src_ip!=ip.of.asterisk.2)) {
>> ds_select_dst("1", "0");
>> }
>>
>> if (!t_relay()) {
>> sl_reply_error();
>> };
>> }
>>
>> # !! Nathelper
>> onreply_route[1] {
>> # NATed transaction ?
>> if (isflagset(6) && status =~ "(183)|2[0-9][0-9]") {
>> fix_nated_contact();
>> # otherwise, is it a transaction behind a NAT and we did not
>> # know at time of request processing ? (RFC1918 contacts)
>> } else if (nat_uac_test("1")) {
>> fix_nated_contact();
>> };
>> }
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at openser.org
>> http://openser.org/cgi-bin/mailman/listinfo/users
>
>
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