Right. However, in this case I didn't think the "FLB_IPV6" flag was
being used by any modules. I did some research and came across this on
https://www.kamailio.org/dokuwiki/doku.php/utils:flags
"branch flags - (NEW) are saved also in transaction, but per branch;
also they will be saved in usrloc (per contact). A new set of functions
were added for manipulating these flags from script. So, there flags
will be registration persistent and branch persistent."
I don't see anything in the register module that could be used to
extract flags from usrloc so I simply added this to the dial-plan but it
didn't return true.
if(isflagset(FLB_IPV6))
{
xlog("L_WARN","FLB_IPV6 WAS SET! \n");
}
Thanks
On 10/25/2018 8:04 AM, Alex Balashov wrote:
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.sipping_bflag
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.sipping_method
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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