[SR-Users] Transport issue thought

[Federico Cabiddu]

Hi,
if a new connection is created and you don't specify $fs or use
force_send_socket, again is the OS choosing the port.
The point is understanding here why a new connection is created instead of
reusing the one created for the INVITE.
Could please paste the logs, possibly at DEBUG level, when kamailio sends
the ACK?

Cheers,

Federico

On Fri, May 18, 2018 at 3:39 PM, Wilkins, Steve <swwilkins at mitre.org> wrote:

> The INVITE has no port assigned in ruri, so I assume it is using the
> default port of 5060; the ACK does have 5060 in the ruri.  Even if a new
> connection is created shouldn’t it be using the listen tcp port since I
> have tcp_reuse_port=yes?
>
>
>
> Thank you!
>
>
>
> *From:* sr-users [mailto:sr-users-bounces at lists.kamailio.org] *On Behalf
> Of *Federico Cabiddu
> *Sent:* Friday, May 18, 2018 8:49 AM
>
> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* Re: [SR-Users] Transport issue thought
>
>
>
> Can you print the logs when it tries to send the ACK?
>
> Check also that the ACK ruri contains the same destination port which was
> used for the INVITE, otherwise a new connection will be created.
>
>
>
> Best regards,
>
>
>
> Federico
>
>
>
> On Fri, May 18, 2018 at 2:31 PM, Wilkins, Steve <swwilkins at mitre.org>
> wrote:
>
> Thank you Alex and Federico,
>
>
>
> I verified, and SO_REUSEPORT is defined on my OS.  I am using Kamailio 5.2
> and I set ‘tcp_reuse_port=yes;’ and $fs;  this has been to no avail as
> ‘ACK’s’ are still using the high port number randomly assigned by Kamailio.
>
>
>
> Thank you all for sharing your knowledge!
>
>
>
>
>
> *From:* sr-users [mailto:sr-users-bounces at lists.kamailio.org] *On Behalf
> Of *Federico Cabiddu
> *Sent:* Friday, May 18, 2018 12:57 AM
> *To:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
> *Subject:* Re: [SR-Users] Transport issue thought
>
>
>
> You are right Alex, Linux kernel didn't support SO_REUSEPORT, which allows
> a socket to be used as source for a tcp connection while is already bound,
> until version 3.9.
>
> Kamailio's parameter tcp_reuse_port, if enabled and your OS has support
> for SO_REUSEPORT (so not only Linux but FreeBSD, OSX and others), allows
> you to use force_send_socket (or $fs) to send messages from a TCP port
> kamailio is listening to.
>
>
>
> Cheers,
>
>
>
> Federico
>
>
>
> On Fri, May 18, 2018 at 12:28 AM, Alex Balashov <abalashov at evaristesys.com>
> wrote:
>
> When an outgoing TCP connection is opened, either a port can be
> explicitly bound, or it is auto-assigned by the OS's networking stack. I
> believe Kamailio does the latter and does not offer options to constrain
> the range. If it does, I'm not aware of any apart from this one:
>
> https://www.kamailio.org/wiki/cookbooks/5.1.x/core#tcp_reuse_port
>
> Not sure if it would help in this case, you'd have to give it a try.
>
>
> On Thu, May 17, 2018 at 10:21:34PM +0000, Wilkins, Steve wrote:
>
> > It appears that the bottom line of my TCP transport not working is that
> Kamailio is randomly assigning large port numbers to send the TCP traffic
> out on.
> > I am not able to randomly open high ports for this purpose.  Is there a
> way to tell Kamailio to only use specific ports for this.  I have tried
> using
> > force_send_socket() with Kamailio' s IP, and the port I want to send out
> on, but this did not work either.  Does this sound like I am on the right
> track?
> >
> > Thank you,
> > -
>
> > _______________________________________________
> > Kamailio (SER) - Users Mailing List
> > sr-users at lists.kamailio.org
> > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
>
> --
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
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