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 <[email protected]> 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 > > [email protected] > > 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/ > > _______________________________________________ > Kamailio (SER) - Users Mailing List > [email protected] > https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users >
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