iproute2: ip addr: Add support for setting 'optimistic'
optimistic DAD is controllable via sysctl for an interface
or all interfaces on the system. This would affect addresses
added by the kernel only.
Recent kernels, however, have enabled support for adding optimistic
address via userspace. This plumbs that support.
Signed-off-by: David Ahern <dsahern@gmail.com>
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index 403f701..3b53933 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -1243,7 +1243,7 @@
{ .name = "secondary", .mask = IFA_F_SECONDARY, .readonly = true, .v6only = false},
{ .name = "temporary", .mask = IFA_F_SECONDARY, .readonly = true, .v6only = false},
{ .name = "nodad", .mask = IFA_F_NODAD, .readonly = false, .v6only = true},
- { .name = "optimistic", .mask = IFA_F_OPTIMISTIC, .readonly = true, .v6only = true},
+ { .name = "optimistic", .mask = IFA_F_OPTIMISTIC, .readonly = false, .v6only = true},
{ .name = "dadfailed", .mask = IFA_F_DADFAILED, .readonly = true, .v6only = true},
{ .name = "home", .mask = IFA_F_HOMEADDRESS, .readonly = false, .v6only = true},
{ .name = "deprecated", .mask = IFA_F_DEPRECATED, .readonly = true, .v6only = true},
diff --git a/man/man8/ip-address.8.in b/man/man8/ip-address.8.in
index 2a55319..fe773c9 100644
--- a/man/man8/ip-address.8.in
+++ b/man/man8/ip-address.8.in
@@ -92,7 +92,7 @@
.ti -8
.IR CONFFLAG " := "
-.RB "[ " home " | " mngtmpaddr " | " nodad " | " noprefixroute " | " autojoin " ]"
+.RB "[ " home " | " mngtmpaddr " | " nodad " | " optimstic " | " noprefixroute " | " autojoin " ]"
.ti -8
.IR LIFETIME " := [ "
@@ -259,6 +259,11 @@
adding this address.
.TP
+.B optimistic
+(IPv6 only) When performing Duplicate Address Detection, use the RFC 4429
+optimistic variant.
+
+.TP
.B noprefixroute
Do not automatically create a route for the network prefix of the added
address, and don't search for one to delete when removing the address. Changing
