<div dir="ltr">Will have this tested by tomorrow and will get back to you. Thanks.<div><br></div><div>- Jayesh</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 18, 2015 at 1:41 PM, Daniel-Constantin Mierla <span dir="ltr"><<a href="mailto:miconda@gmail.com" target="_blank">miconda@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
Hello,<br>
<br>
I just pushed a patch to master branch that should cope with partial
data received on tcp connection. No time to test at all, therefore
any feedback will be appreciated.<br>
<br>
Cheers,<br>
Daniel<div><div class="h5"><br>
<br>
<div>On 15/09/15 14:52, Daniel-Constantin
Mierla wrote:<br>
</div>
<blockquote type="cite">
Hello,<br>
<br>
I will look if there are options in libev to buffer data or try to
implement a buffering mechanism locally for such cases.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div>On 14/09/15 23:00, Jayesh Nambiar
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello Daniel,
<div>After further testing with evapi module, I figured that
when Netstrings are used, an event route is invoked
individually for each message even if if multiple netstring
messages are received in a single TCP packet. But this
doesn't work effectively when a single proper message is
split-up in two packets. For Example, if a message arrives
as:</div>
<div>12:Hello World!, 12:Hello World!, 12:Hello World! in a
single packet, kamailio properly invokes the event route
"evapi:message-received" thrice for every individual proper
netstring message. </div>
<div>But if the first packet contains:</div>
<div>12:Hello World!, 12:Hello</div>
<div>And Second Packet contains:</div>
<div> World!, 12:Hello World!</div>
<div>the event route is invoked only once !!</div>
<div><br>
</div>
<div>The above pattern is very much possible while sending and
receiving packets over TCP Socket. Our tests for receiving
an approximately 150 byte message over evapi socket at the
rate of roughly 1000cps causes a lot of real events to be
missed because of the above problem. You can never be sure
when TCP will split messages in different chunks.</div>
<div>This definitely looks like a bug which makes it not very
reliable at large scale deployments. Would really appreciate
your inputs on this. Thanks;</div>
<div><br>
</div>
<div>- Jayesh</div>
<div><br>
</div>
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Sep 10, 2015 at 4:01 PM,
Jayesh Nambiar <span dir="ltr"><<a href="mailto:jayesh1017@gmail.com" target="_blank"></a><a href="mailto:jayesh1017@gmail.com" target="_blank">jayesh1017@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi Daniel,
<div>Thanks for the quick response. So if I do not use
Netstrings, does Kamailio allow me to create a custom
logic in the script. For eg. if I decide to use
newline as a delimiter, can I keep buffering the
message until I encounter the delimiter from the event
route and then execute whatever I have to within the
script??</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>- Jayesh</div>
</div>
<div>
<div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Thu, Sep 10, 2015 at
1:29 PM, Daniel-Constantin Mierla <span dir="ltr"><<a href="mailto:miconda@gmail.com" target="_blank"></a><a href="mailto:miconda@gmail.com" target="_blank">miconda@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hello,<br>
<br>
tcb is stream protocol and several messages
can be queued on the pipe at the same time.
That is the reason for netstring format, to be
able to easily detect the boundaries of each
message. If netstring format is enabled and
kamailio receives several messages at once, it
splits them and for each is executing the
event route.<br>
<br>
If netstring format is not used, the kamailio
is executing the event route with the entire
content that was read at once from the tcp
connection.<br>
<br>
Cheers,<br>
Daniel
<div>
<div><br>
<br>
<div>On 09/09/15 22:01, Jayesh Nambiar
wrote:<br>
</div>
</div>
</div>
<blockquote type="cite">
<div>
<div>
<div dir="ltr">Hello,
<div>I'm exploring the evapi module
for my kamailio to interface with an
external node.js app for third party
stuff like AAA, billing engine
tasks, notifications and so on. I
followed and took some ideas from
the rtjson and evapi tutorial found
here(<a href="http://kb.asipto.com/kamailio:k43-async-sip-routing-nodejs" target="_blank">http://kb.asipto.com/kamailio:k43-async-sip-routing-nodejs</a>)
to build the node.js app consuming
events.</div>
<div>When I stress tested the scenario
using SIPp and tried sending a lot
of events at 300-350cps from
Kamailio, I noticed that at times
the client is receiving 2-3 events
in a single message together
although I do event_sync_relay once
per SIP message received and have
netstrings enabled. I believe this
is a typical behavior of TCP and
needs to be handled by the client
using some kind of Netstring
handler. Please correct me if I'm
wrong.</div>
<div>And hence I'd like to know what
particularly needs to be taken care
of while writing a client that is
listening for events on raw tcp
socket and how does kamailio handle
this situation while receiving
messages over TCP socket?? Does
kamailio recognize the end of
netstring properly on
evapi:message-received and give
exactly one message to take care of
on every "message-received" event or
should that be handled in the script
somewhere !!</div>
<div>I also referred cgrates client
over evapi example which is written
in GO, but I couldnt find them
handling TCP streams clearly either.</div>
<div>I'd really appreciate some expert
suggestion here to make an informed
decision on using the evapi module
for a large scale solution.</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>- Jayesh</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
<fieldset></fieldset>
<br>
</div>
</div>
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<span><font color="#888888"> </font></span></blockquote>
<span><font color="#888888"> <br>
<pre cols="72">--
Daniel-Constantin Mierla
<a href="http://twitter.com/#%21/miconda" target="_blank">http://twitter.com/#!/miconda</a> - <a href="http://www.linkedin.com/in/miconda" target="_blank">http://www.linkedin.com/in/miconda</a>
Book: SIP Routing With Kamailio - <a href="http://www.asipto.com" target="_blank">http://www.asipto.com</a>
Kamailio Advanced Training, Sep 28-30, 2015, in Berlin - <a href="http://asipto.com/u/kat" target="_blank">http://asipto.com/u/kat</a></pre>
</font></span></div>
<br>
_______________________________________________<br>
SIP Express Router (SER) and Kamailio (OpenSER)
- sr-users mailing list<br>
<a href="mailto:sr-users@lists.sip-router.org" target="_blank">sr-users@lists.sip-router.org</a><br>
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<br>
</blockquote>
</div>
<br>
</div>
</div>
</div>
</blockquote>
</div>
<br>
</div>
</blockquote>
<br>
<pre cols="72">--
Daniel-Constantin Mierla
<a href="http://twitter.com/#%21/miconda" target="_blank">http://twitter.com/#!/miconda</a> - <a href="http://www.linkedin.com/in/miconda" target="_blank">http://www.linkedin.com/in/miconda</a>
Book: SIP Routing With Kamailio - <a href="http://www.asipto.com" target="_blank">http://www.asipto.com</a>
Kamailio Advanced Training, Sep 28-30, 2015, in Berlin - <a href="http://asipto.com/u/kat" target="_blank">http://asipto.com/u/kat</a></pre>
</blockquote>
<br>
<pre cols="72">--
Daniel-Constantin Mierla
<a href="http://twitter.com/#!/miconda" target="_blank">http://twitter.com/#!/miconda</a> - <a href="http://www.linkedin.com/in/miconda" target="_blank">http://www.linkedin.com/in/miconda</a>
Book: SIP Routing With Kamailio - <a href="http://www.asipto.com" target="_blank">http://www.asipto.com</a>
Kamailio Advanced Training, Sep 28-30, 2015, in Berlin - <a href="http://asipto.com/u/kat" target="_blank">http://asipto.com/u/kat</a></pre>
</div></div></div>
</blockquote></div><br></div>