29 Sep
2006
29 Sep
'06
3:06 p.m.
Hi Klaus and all other who read this.
It's not a problem of tcp socket - yesterday i rewrite gateway config for fowarding
directed to extgateway requests to gateway itself.
In tcp this problems not occured, but after i switched on tls, i see overfilled queues
again. In that case i haven't extgateway, communications with
remote sockets and etc. Did anybody test openser whith big payload? I think this problem
occurs because in my case i have big traffic and several process that simultaniously use
tls. Did anybody have the same problem?
Hi Serega!
I'm not sure - just a guess. openser uses "worker threads". This worker
threads get a SIP message from the listener thread, process them, and
then they send them.
If for some reason the sending fails - e.g. the gateway sends via
TCP/TLS to extgateway and extgateway's receiving queue is full. Then
gateway's sending buffer gets full and the threads wait until they can
send. Thus, as the threads are all busy, also the receiving queue of
gateway gets full. I guess after some time the threads give up sending
and will read again.
The question is: why does the sending buffer gets full? Where is gateway
sending the messages to?
The sending queue must not get flushed. The queue is in the OS, not in
openser. As TCP guarantees that there is no loss/reordering the TCP
stack must not flush the queue.
regards
klaus
serega wrote:
Hi all.
I have next problem while using openser with tls. System consists of
sip statefull server (in next time, simply, server) and stateless sip
gateway (gateway). Server used for connect to jabber server. Server
contains rewrote jabber module logic and also use presence module.
Gateway used to connect to other sip gateway (extgateway) via tls
protocol. Gateway use 1.1 openser version and doesn’t contain changed
code. When server together with gateway restarts and server in its
database contains above 260 subscriptions (in watcherinfo table) i
have error. Socket used by gateway to connect with extgateway
contains in receive and sent queues a lot of data (above 50kByte on
each sides). This data never flushed out. This happens because after
restart sip server through gateway send notifications to extgateway.
When I attached using gdb to process that send data, I saw that it
was in infinity loop because tls library returns SSL_ERROR_WANT_WRITE
and I think it’s correct because we have overfilled send queue. In
this case I don’t interest why receive queue not empty (I think it
happens because sending process have got block on socket). But I
don’t understand why sent queue not flushed. I test this behavior
using tcp – all was correct. Socket not closed by other side because
this status can be unchanged above one day. Anybody can help me? Why
this happens?
I use openssl-0.9.8c and redhat os (Linux xdevel1 2.4.21-4.ELsmp #1
SMP Fri Oct 3 17:52:56 EDT 2003 i686 i686 i386 GNU/Linux). Computer
have too Pentium 4 processors).
Gateway.cfg (sip.qa.hbex.com – gateway address):
# # $Id: router_qa.cfg,v 1.1 2006/08/02 18:14:34 ilya Exp $ # #
simple quick-start config script #
# ----------- global configuration parameters
------------------------
debug=9 # debug level (cmd line: -dddddddddd)
log_facility=LOG_LOCAL0 fork=yes log_stderror=yes # (cmd line: -E)
check_via=no # (cmd. line: -v) dns=no # (cmd. line: -r)
rev_dns=no # (cmd. line: -R) children=20
fifo="/tmp/openser_fifo" server_signature=no
fifo_db_url="mysql://root:@localhost/openser"
listen = udp:sip.qa.hbex.com:5060 #incoming sip server address listen
= tcp:sip.qa.hbex.com:5060
#tls address disable_tls = 0 listen = tls:sip.qa.hbex.com:5061 listen
= udp:sip.qa.hbex.com:5061
tls_certificate = "/ home/inop/ex.com-cert.pem" tls_private_key =
"/home/inop/ex.com-privkey.pem" tls_ca_list =
"/home/inop/ex.com-calist.pem" tls_require_client_certificate=0
tls_verify_client=0 tls_verify_server=0
# ------------------ module loading
---------------------------------- loadmodule
"/home/interop/openser/lib/openser/modules/rr.so" loadmodule
"/home/interop/openser/lib/openser/modules/xlog.so" loadmodule
"/home/interop/openser/lib/openser/modules/textops.so" loadmodule
"/home/interop/openser/lib/openser/modules/maxfwd.so" loadmodule
"/home/interop/openser/lib/openser/modules/sl.so" loadmodule
"/home/interop/openser/lib/openser/modules/mysql.so" loadmodule
"/home/interop/openser/lib/openser/modules/tm_unchanged.so"
loadmodule "/home/interop/openser/lib/openser/modules/usrloc.so"
loadmodule "/home/interop/openser/lib/openser/modules/registrar.so"
# ----------------- setting module-specific parameters
--------------- modparam("registrar", "default_expires", 120)
modparam("registrar", "use_domain", 1)
modparam("usrloc", "use_domain", 1) modparam("usrloc",
"db_mode",
0) # Uncomment this if you want to use SQL database # for persistent
storage and comment the previous line #modparam("usrloc", "db_mode",
2)
# add value to ;lr param to make some broken UAs happy modparam("rr",
"enable_full_lr", 1) modparam("maxfwd", "max_limit", 10) #
------------------------- request routing logic -------------------
# main routing logic route{ if (!mf_process_maxfwd_header("10")) {
sl_send_reply("483","To Many Hops"); drop(); }; if (dst_port==5061)
{
if (search("^To:.*@.*cmnicator.com") ||
search("^To:.*@.*cihb.com"))
{ # rewrite destination and forward to jabber (sip server) route(1);
return; }; sl_reply_error(); return; } if (method=="REGISTER") {
xlog("XXX: saving location msg=$mb\n");
if(!save_noreply("location"))
{ log("XXX: Error saving location!\n"); sl_reply_error(); }
sl_send_reply("200","OK"); return; } if
(search("^To:.*@.*cmnicator.com") || search("^To:.*@.*cihb.com")) {
#forward to self route(3); return; } ##forward to ext gateway
route(2); }
route[1]{ if (method!="MESSAGE" && method!="SUBSCRIBE"
&&
method!="NOTIFY") { log("XXX: Request not forwarded to sip
server!\n"); sl_send_reply("202","Accepted"); return; }
t_on_reply("1"); record_route();
if(!lookup("location")) { if (method!="SUBSCRIBE") { log("XXX:
only
subscribes are processed for user that are not registered\n");
sl_reply_error(); return; }
subst_uri('/(.*)@(.*)/\1#\2*jabber.qa.im.hb.com@jabber01.qa.im.hb.com/ig');
if(!t_relay()) { log("XXX: error forwarding jabber01...\n");
sl_reply_error(); return; } else { sl_send_reply("200","OK");
return;
} } else { log("XXX: forwarding to the address of record...\n");
if(!t_relay()) { log("XXX: error forwarding to address of record
\n"); sl_reply_error(); return; } else { sl_send_reply("200",
"OK");
return; } }
}
# forwarding to external gateway route[2]{ log("XXX: rewriting
headers\n");
subst('/^(From:[^@#]*)#([^@]*)\*jabber.qa.im.hb.com@jabber...qa.im.hb.com(.*)/\1@\2\3/ig');
subst('/^(Contact:[^@#]*)#([^@]*)\*jabber.qa.im.hb.com@jabber...qa.im.hb.com(.*)/\1@\2\3/ig');
if(!forward("tls:43.123.141.166:3000")) { log("XXX: Error forwarding
to external gateway!\n"); sl_reply_error(); } else {
sl_send_reply("200", "Accepted"); }; }
# forwarding to SELF route[3]{ log("XXX: rewriting headers\n");
subst('/^(From:[^@#]*)#([^@]*)\*jabber.qa.im.hb.com@jabber...qa.im.hb.com(.*)/\1@\2\3/ig');
subst('/^(Contact:[^@#]*)#([^@]*)\*jabber.qa.im.hb.com@jabber...qa.im.hb.com(.*)/\1@\2\3/ig');
log("XXX: about to forward to self\n");
if(!forward("tcp:sip.qa.hbex.com:5061")) { log("XXX: Error forwarding
to self!\n"); sl_reply_error(); } else { sl_send_reply("200",
"Accepted"); }; }
# this is executed for replies onreply_route[1]{
subst('/^(To:[^@#]*)#([^@]*)\*jabber.qa.im.hb.com@jabber...qa.im.hb.com(.*)/\1@\2\3/ig');
subst('/^(Contact:[^@#]*)#([^@]*)\*jabber.qa.im.hb.com@jabber...qa.im.hb.com(.*)/\1@\2\3/ig');
route(2); }
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