Hello tech@,
I discussed a little with brad@ of some features of the rtadvd(8)
daemon in OpenBSD and of the state of the support for some IPv6
features and he asked me if it was possible to add a `noifprefix`
option to the deamon, to disable automatic prefix information querying
on the interface in case no `addr` option is present in the config file.
Here is the (very simple) patch for this.
Regards,
--
Stephane A. Sezer
Index: usr.sbin/rtadvd/config.c
===================================================================
RCS file: /cvs/src/usr.sbin/rtadvd/config.c,v
retrieving revision 1.26
diff -u -r1.26 config.c
--- usr.sbin/rtadvd/config.c 23 Apr 2008 10:17:50 -0000 1.26
+++ usr.sbin/rtadvd/config.c 25 Jan 2012 03:30:54 -0000
@@ -320,7 +320,7 @@
now.tv_sec + pfx->preflifetime;
}
}
- if (tmp->pfxs == 0)
+ if (tmp->pfxs == 0 && !agetflag("noifprefix"))
get_prefix(tmp);
MAYHAVE(val, "mtu", 0);
Index: usr.sbin/rtadvd/rtadvd.conf.5
===================================================================
RCS file: /cvs/src/usr.sbin/rtadvd/rtadvd.conf.5,v
retrieving revision 1.25
diff -u -r1.25 rtadvd.conf.5
--- usr.sbin/rtadvd/rtadvd.conf.5 19 Sep 2010 21:59:23 -0000 1.25
+++ usr.sbin/rtadvd/rtadvd.conf.5 25 Jan 2012 03:30:54 -0000
@@ -142,7 +142,9 @@
These items can be omitted, then
.Nm rtadvd
will automatically get appropriate prefixes from the kernel's routing table,
-and advertise the prefixes with the default parameters.
+and advertise the prefixes with the default parameters, unless the
+.Cm noifprefix
+flag is specified.
Keywords other than
.Cm clockskew
can be augmented with a number, like
@@ -184,6 +186,18 @@
.Xr termcap 5
file format as well as IPv6 numeric addresses, the field MUST be quoted
using double quotes.
+.It Cm \&noifprefix
+(bool) Specifies whether
+.Nm rtadvd
+should gather prefix information from the interface if no
+.Cm addr
+is specified. If no
+.Cm addr
+is given, and
+.Cm noifprefix
+is set,
+.Nm rtadvd
+will send RA packets with no prefix information.
.It Cm \&vltime
(num) Valid lifetime field
.Pq unit: seconds .
