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net/dns: don't try to configure LLMNR or mdns in NetworkManager.

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Fixes #1870.

Signed-off-by: David Anderson <danderson@tailscale.com>
(cherry picked from commit 77e23755012f8f44cf3d76df341144bfed95a89d)
This commit is contained in:
David Anderson 2021-05-06 14:38:48 -07:00
parent ff4c2dbec9
commit bf7c50dbdd
1 changed files with 6 additions and 3 deletions
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9
net/dns/nm.go
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@ -175,9 +175,12 @@ func (m *nmManager) trySet(ctx context.Context, config OSConfig) error {
search = append(search, "~.")
}
general := settings["connection"]
general["llmnr"] = dbus.MakeVariant(0)
general["mdns"] = dbus.MakeVariant(0)
// Ideally we would like to disable LLMNR and mdns on the
// interface here, but older NetworkManagers don't understand
// those settings and choke on them, so we don't. Both LLMNR and
// mdns will fail since tailscale0 doesn't do multicast, so it's
// effectively fine. We used to try and enforce LLMNR and mdns
// settings here, but that led to #1870.
ipv4Map := settings["ipv4"]
ipv4Map["dns"] = dbus.MakeVariant(dnsv4)