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ipn/local: differentiate Shields Up from Uninitialized in logs.

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We were printing "Shields Up" when the netmap wasn't initialized yet,
which while technically effectively true, turned out to be confusing
when trying to debug things.

Signed-off-by: Avery Pennarun <apenwarr@tailscale.com>
This commit is contained in:
Avery Pennarun 2020-04-30 03:29:06 -04:00
parent 64db026c8b
commit d6c34368e8
1 changed files with 8 additions and 4 deletions
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12
ipn/local.go
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@ -354,17 +354,21 @@ func (b *LocalBackend) Start(opts Options) error {
func (b *LocalBackend) updateFilter(netMap *controlclient.NetworkMap) {
// TODO(apenwarr): don't replace filter at all if unchanged.
// TODO(apenwarr): print a diff instead of full filter.
if netMap == nil || b.Prefs().ShieldsUp {
// Not configured yet or shields up, block everything
if netMap == nil {
// Not configured yet, block everything
b.logf("netmap packet filter: (not ready yet)")
b.e.SetFilter(filter.NewAllowNone())
} else if b.Prefs().ShieldsUp {
// Shields up, block everything
b.logf("netmap packet filter: (shields up)")
b.e.SetFilter(filter.NewAllowNone())
} else {
now := time.Now()
if now.Sub(b.lastFilterPrint) > 1*time.Minute {
b.logf("netmap packet filter: %v", b.netMapCache.PacketFilter)
b.logf("netmap packet filter: %v", netMap.PacketFilter)
b.lastFilterPrint = now
} else {
b.logf("netmap packet filter: (suppressed)")
b.logf("netmap packet filter: (length %d)", len(netMap.PacketFilter))
}
b.e.SetFilter(filter.New(netMap.PacketFilter, b.e.GetFilter()))
}