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all: use network less when running in v86 emulator
Updates #5794 Change-Id: I1d8b005a1696835c9062545f87b7bab643cfc44d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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committed by
Brad Fitzpatrick

parent
29c2bb1db6
commit
65c7a37bc6
@@ -1086,7 +1086,7 @@ func (c *Direct) sendMapRequest(ctx context.Context, isStreaming bool, nu Netmap
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} else {
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vlogf("netmap: got new map")
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}
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if resp.ControlDialPlan != nil {
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if resp.ControlDialPlan != nil && !ignoreDialPlan() {
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if c.dialPlan != nil {
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c.logf("netmap: got new dial plan from control")
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c.dialPlan.Store(resp.ControlDialPlan)
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@@ -1774,6 +1774,13 @@ func makeScreenTimeDetectingDialFunc(dial dialFunc) (dialFunc, *atomic.Bool) {
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}, ab
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}
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func ignoreDialPlan() bool {
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// If we're running in v86 (a JavaScript-based emulation of a 32-bit x86)
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// our networking is very limited. Let's ignore the dial plan since it's too
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// complicated to race that many IPs anyway.
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return hostinfo.IsInVM86()
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}
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func isTCPLoopback(a net.Addr) bool {
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if ta, ok := a.(*net.TCPAddr); ok {
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return ta.IP.IsLoopback()
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