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envknob: support changing envknobs post-init

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Updates #5114

Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2022-09-14 12:49:39 -07:00
committed by Brad Fitzpatrick
parent 33ee2c058e
commit 74674b110d
31 changed files with 311 additions and 167 deletions
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6
control/controlclient/map.go
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@@ -190,7 +190,7 @@ func (ms *mapSession) netmapForResponse(resp *tailcfg.MapResponse) *netmap.Netwo
}
ms.addUserProfile(peer.User)
}
if DevKnob.ForceProxyDNS {
if DevKnob.ForceProxyDNS() {
nm.DNS.Proxied = true
}
ms.netMapBuilding = nil
@@ -356,13 +356,13 @@ func cloneNodes(v1 []*tailcfg.Node) []*tailcfg.Node {
return v2
}
var debugSelfIPv6Only = envknob.Bool("TS_DEBUG_SELF_V6_ONLY")
var debugSelfIPv6Only = envknob.RegisterBool("TS_DEBUG_SELF_V6_ONLY")
func filterSelfAddresses(in []netip.Prefix) (ret []netip.Prefix) {
switch {
default:
return in
case debugSelfIPv6Only:
case debugSelfIPv6Only():
for _, a := range in {
if a.Addr().Is6() {
ret = append(ret, a)