25 Oct
2018
25 Oct
'18
6:04 p.m.
Hi Isaac,
Not all flags are explicitly used elsewhere in the logic of a config;
some are used to convey information to modules.
In this case:
modparam("nathelper", "sipping_bflag", FLB_NATSIPPING)
https://kamailio.org/docs/modules/5.1.x/modules/nathelper.html#nathelper.p.…
In other words, if this branch flag is set, this Contact will be marked
by the nathelper module for periodic pinging via OPTIONS or INFO[1]. The
purpose of this periodic server-side pinging is to keep NAT pinholes
alive.
-- Alex
[1]
https://kamailio.org/docs/modules/5.1.x/modules/nathelper.html#nathelper.p.…
On Thu, Oct 25, 2018 at 07:35:48AM -0700, Isaac wrote:
Hello,
In the example for a dual-stack IPv6/IPv4 Kamailio setup here:
https://kb.asipto.com/kamailio:kamailio-mixed-ipv4-ipv6 the "FLB_IPV6" flag is
being sent on IPv6 registrations. Why set this flag on IPv6 registrations? If I understand
correctly, registration requests never make it beyond !save("location so it's not
like the flag can be used further in the dial-plan.
The code in question:
route[REGISTRAR] {
if (is_method("REGISTER"))
{
if(isflagset(FLT_NATS))
{
setbflag(FLB_NATB);
# uncomment next line to do SIP NAT pinging
## setbflag(FLB_NATSIPPING);
}
if(af==INET6)
setbflag(FLB_IPV6);
if (!save("location"))
sl_reply_error();
exit;
}
}
Any help is appreciated.
Thanks
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--
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/