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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>
This commit is contained in:
Ian K. Coolidge 2020-05-27 11:03:46 -07:00 committed by David Ahern
parent 9d59c86e57
commit 5413a735a6
2 changed files with 7 additions and 2 deletions
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2
ip/ipaddress.c
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@ -1243,7 +1243,7 @@ static const struct ifa_flag_data_t {
{ .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},

7
man/man8/ip-address.8.in
View File

@ -92,7 +92,7 @@ ip-address \- protocol address management
.ti -8
.IR CONFFLAG " := "
.RB "[ " home " | " mngtmpaddr " | " nodad " | " noprefixroute " | " autojoin " ]"
.RB "[ " home " | " mngtmpaddr " | " nodad " | " optimstic " | " noprefixroute " | " autojoin " ]"
.ti -8
.IR LIFETIME " := [ "
@ -258,6 +258,11 @@ stateless auto-configuration was active.
(IPv6 only) do not perform Duplicate Address Detection (RFC 4862) when
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