[Kamailio-Users] No UDP Address already in use?

[Luciano Afranllie]

On Thu, Jan 29, 2009 at 3:04 PM, mayamatakeshi <mayamatakeshi at gmail.com> wrote:
> Hello,
> If I start a second instance of kamailio by mistake, if the cfg file
> instructs it to listen to tcp ports, the second instance will exit with
> something like this:
> tcp_init: bind(7, 0x81b28ec, 16) on 127.0.0.1:5060 : Address already in use
>
> But if the cfg file only instructs kamailio to bind to udp ports, the second
> instance will not exit. Is this a bug?
>
> I'm curious because if we start kamailio and a udp port is in use by another
> application (not kamailio), kamailio will exit with
> udp_init: bind(4, 0x819f274, 16) on 192.168.88.29: Address already in use
> Why is that so?

That behavior may be possible if kamailio is setting SO_REUSEADDR
socket option for udp but not for tcp.

Regards
Luciano