[Users] am I doing it right?
samuel
samu60 at gmail.com
Thu Jul 27 09:38:42 CEST 2006
Are both proxies using the same remote database???
modparam("usrloc|lcr|auth_db|avpops|group","db_url","mysql://openser:openserrw@voip-db.mydomain.com/openser")
If this is the case, when a user agent registers again and makes a SRV
DNS query, it might get the address of the other server, which tries
to add to the database a record which will be understood as a
duplicate by the DB because there's already an entry for that user.
The other issues about the Warning and message size has nothing to do
with DNS "behaviour". It means that the server tries to add a Warning
header, which includes information useful for debugging purpouses, but
when openSER checks the size of the message, it realises that the
message will become bigger than (MTU-200) and therefore it does not
add the header because it will might to fragmentation problems in UDP.
You can ignore this problem or disable the adition of this warning
header if you are not using it.
Hope it helps.
Samuel.
2006/7/26, Ohad.Levy at infineon.com <Ohad.Levy at infineon.com>:
> Hi All,
>
> I'm trying to setup a redundant environment with DNS SRV records, 2 (or
> more) SIP registration servers, and Asterisk gateways.
> Basically I've setup both OpenSER clients to t_replicate each other the
> registration message if its coming from a client, and save it to the
> database or to memory when its coming from the other OpenSER server.
>
> However, every once in a while, I get message to big, and or duplicate
> messages (WARNING: warning skipped -- too big, or ERROR:
> warning_builder: buffer size exceeded, submit_query: Duplicate entry
> ,db_insert: Error while submitting query...)
>
> While it seems to work in general, I was not sure that this is the
> "right" way to do it.
>
> I'm attaching my openser.cfg of one of the machines; the other is more
> or less identical...
> Thanks
>
> # ----------- global configuration parameters ------------------------
>
> debug=9 # debug level (cmd line: -dddddddddd)
> fork=yes
> log_stderror=no # (cmd line: -E)
>
> check_via=no # (cmd. line: -v)
> dns=no # (cmd. line: -r)
> listen=172.28.132.20
> rev_dns=no # (cmd. line: -R)
> port=5060
> children=4
> fifo="/tmp/openser_fifo"
> alias="mydomain.com"
>
> # ------------------ module loading ----------------------------------
>
> loadmodule "/usr/local/lib/openser/modules/mysql.so"
> loadmodule "/usr/local/lib/openser/modules/sl.so"
> loadmodule "/usr/local/lib/openser/modules/tm.so"
> loadmodule "/usr/local/lib/openser/modules/rr.so"
> loadmodule "/usr/local/lib/openser/modules/maxfwd.so"
> loadmodule "/usr/local/lib/openser/modules/usrloc.so"
> loadmodule "/usr/local/lib/openser/modules/registrar.so"
> loadmodule "/usr/local/lib/openser/modules/textops.so"
> loadmodule "/usr/local/lib/openser/modules/auth.so"
> loadmodule "/usr/local/lib/openser/modules/auth_db.so"
> loadmodule "/usr/local/lib/openser/modules/lcr.so"
> loadmodule "/usr/local/lib/openser/modules/xlog.so"
>
> # ----------------- setting module-specific parameters ---------------
>
> modparam("usrloc", "db_mode", 2)
> modparam("usrloc|lcr|auth_db|avpops|group","db_url","mysql://openser:ope
> nserrw at voip-db.mydomain.com/openser")
> modparam("auth_db", "calculate_ha1", yes) modparam("auth_db",
> "password_column", "password")
>
> modparam("rr", "enable_full_lr", 1)
>
> # ------------------------- request routing logic -------------------
>
> # main routing logic
>
> route{
>
> # initial sanity checks -- messages with
> # max_forwards==0, or excessively long requests
> if (!mf_process_maxfwd_header("10")) {
> sl_send_reply("483","Too Many Hops");
> exit;
> };
>
> if (msg:len >= 2048 ) {
> sl_send_reply("513", "Message too big");
> exit;
> };
>
> # we record-route all messages -- to make sure that
> # subsequent messages will go through our proxy; that's
> # particularly good if upstream and downstream entities
> # use different transport protocol
> if (!method=="REGISTER")
> record_route();
>
> # subsequent messages withing a dialog should take the
> # path determined by record-routing
> if (loose_route()) {
> # mark routing logic in request
> append_hf("P-hint: rr-enforced\r\n");
> route(1);
> };
>
> if (!uri==myself) {
> route(1);
> };
>
> # Handle Request logic here
> if (uri==myself) {
> if (method=="REGISTER") {
> route(2);
> exit;
> }
> lookup("aliases");
> if (!uri==myself) {
> append_hf("P-hint: outbound alias\r\n");
> route(1);
> };
>
> if (!load_gws()) {
> sl_send_reply("500", "Server Internal Error -
> Cannot load gateways");
> exit;
> };
> if (!next_gw()) {
> sl_send_reply("503", "Service not available, no
> gateways found");
> log (1,"No more gateways");
> } else {
> log (1,"Found a gateway");
> }
> if (!lookup("location")) {
> sl_send_reply("404", "Not Found");
> exit;
> };
> append_hf("P-hint: usrloc applied\r\n");
> };
> route(1);
> }
>
>
> route[1] {
> # send it out now; use stateful forwarding as it works reliably
> # even for UDP2TCP
> if (!t_relay()) {
> sl_reply_error();
> };
> exit;
> }
>
> route[2] {
> #handle all Registration here....
> if (search("^(Contact|m):
> .*@(voip.mydomain.com)")){
> log(1, "ALERT: someone trying to set
> aor==server address\n");
> sl_send_reply("476", "Server address in
> contacts is not allowed" );
> exit;
> };
>
> # challenge/response
> #if a registration request is coming from another ser server, it
> means that's it's already authenticated the user and wrote
> #an entry in the database, so lets just write it into our
> memory.
> if (src_ip==172.28.132.21) {
> save_memory("location");
> log(1, "Registered replicated user from
> Proxy");
> exit;
> };
> # this is a new request, lets check that the user is
> valid.
> if (!www_authorize("mydomain.com",
> "subscriber")) {
> www_challenge("mydomain.com", "0");
> log(1, "Authentication challenge issued.
> Waiting for reply.\n");
> exit;
> };
>
> # Authentication successful, add entry to our Contact database
> log(1, "Authentication challenge reply ok.\n");
> if (!save("location")) {
> sl_reply_error();
> log(1, "ALERT: Unable to save URI to
> location database.\n");
> } else {
> # and replicate the request to the backup server
> if (!src_ip==172.28.132.21) {
> log(1, "REPLICATE: Replicating
> register request\n");
>
> t_replicate("sip:172.28.132.21:5060");
> };
>
> };
> }
>
>
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