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wgengine/magicsock: remove TODO

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The TODO above derphttp.NewClient suggests it does network I/O,
but the derphttp client connects lazily and so creating one is
very cheap.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
This commit is contained in:
David Crawshaw
2020-03-11 10:40:46 -04:00
committed by David Crawshaw
parent af58cfc476
commit 7ec54e0064
1 changed files with 2 additions and 1 deletions
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3
wgengine/magicsock/magicsock.go
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@@ -706,7 +706,8 @@ func (c *Conn) derpWriteChanOfAddr(addr *net.UDPAddr) chan<- derpWriteRequest {
return nil
}
// TODO(bradfitz): don't hold derpMu here. It's slow. Release first and use singleflight to dial+re-lock to add.
// Note that derphttp.NewClient does not dial the server
// so it is safe to do under the derpMu lock.
dc, err := derphttp.NewClient(c.privateKey, "https://"+derpSrv.HostHTTPS+"/derp", c.logf)
if err != nil {
c.logf("derphttp.NewClient: port %d, host %q invalid? err: %v", addr.Port, derpSrv.HostHTTPS, err)