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control/controlhttp: set forceNoise443 on Plan 9

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Updates #5794

Change-Id: Idc67082f5d367e03540e1a5310db5b466ee03666
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2025-04-01 04:01:00 -07:00 committed by Brad Fitzpatrick
parent 7dbb21cae8
commit 4c9b37fa2e
1 changed files with 9 additions and 0 deletions
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9
control/controlhttp/client.go
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@ -270,6 +270,15 @@ var forceNoise443 = envknob.RegisterBool("TS_FORCE_NOISE_443")
// use HTTPS connections as its underlay connection (double crypto). This can
// be necessary when networks or middle boxes are messing with port 80.
func (d *Dialer) forceNoise443() bool {
if runtime.GOOS == "plan9" {
// For running demos of Plan 9 in a browser with network relays,
// we want to minimize the number of connections we're making.
// The main reason to use port 80 is to avoid double crypto
// costs server-side but the costs are tiny and number of Plan 9
// users doesn't make it worth it. Just disable this and always use
// HTTPS for Plan 9. That also reduces some log spam.
return true
}
if forceNoise443() {
return true
}