From 5413a735a68de792eb7db1644fb3e3b888356863 Mon Sep 17 00:00:00 2001 From: "Ian K. Coolidge" Date: Wed, 27 May 2020 11:03:46 -0700 Subject: [PATCH] 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 --- ip/ipaddress.c | 2 +- man/man8/ip-address.8.in | 7 ++++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/ip/ipaddress.c b/ip/ipaddress.c index 403f7010..3b53933f 100644 --- a/ip/ipaddress.c +++ b/ip/ipaddress.c @@ -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}, diff --git a/man/man8/ip-address.8.in b/man/man8/ip-address.8.in index 2a553190..fe773c91 100644 --- a/man/man8/ip-address.8.in +++ b/man/man8/ip-address.8.in @@ -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