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control/controlclient: allow for an unset linkMon.

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Signed-off-by: David Anderson <danderson@tailscale.com>
This commit is contained in:
David Anderson 2021-03-11 21:21:15 -08:00
parent fa6110e47b
commit 1bc3c03562
1 changed files with 1 additions and 1 deletions
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2
control/controlclient/direct.go
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@ -547,7 +547,7 @@ func (c *Direct) sendMapRequest(ctx context.Context, maxPolls int, cb func(*netm
OmitPeers: cb == nil,
}
var extraDebugFlags []string
if hostinfo != nil && ipForwardingBroken(hostinfo.RoutableIPs, c.linkMon.InterfaceState()) {
if hostinfo != nil && c.linkMon != nil && ipForwardingBroken(hostinfo.RoutableIPs, c.linkMon.InterfaceState()) {
extraDebugFlags = append(extraDebugFlags, "warn-ip-forwarding-off")
}
if health.RouterHealth() != nil {