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net/wsconn: add back custom wrapper for turning a websocket.Conn into a net.Conn

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We removed it in #4806 in favor of the built-in functionality from the
nhooyr.io/websocket package. However, it has an issue with deadlines
that has not been fixed yet (see nhooyr/websocket#350). Temporarily
go back to using a custom wrapper (using the fix from our fork) so that
derpers will stop closing connections too aggressively.

Updates #5921

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This commit is contained in:
Mihai Parparita
2022-10-18 14:20:43 -07:00
committed by Mihai Parparita
parent d00b095f14
commit 9d04ffc782
8 changed files with 224 additions and 4 deletions
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3
cmd/derper/websocket.go
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@@ -13,6 +13,7 @@ import (
"nhooyr.io/websocket"
"tailscale.com/derp"
"tailscale.com/net/wsconn"
)
var counterWebSocketAccepts = expvar.NewInt("derp_websocket_accepts")
@@ -50,7 +51,7 @@ func addWebSocketSupport(s *derp.Server, base http.Handler) http.Handler {
return
}
counterWebSocketAccepts.Add(1)
wc := websocket.NetConn(r.Context(), c, websocket.MessageBinary)
wc := wsconn.NetConn(r.Context(), c, websocket.MessageBinary)
brw := bufio.NewReadWriter(bufio.NewReader(wc), bufio.NewWriter(wc))
s.Accept(r.Context(), wc, brw, r.RemoteAddr)
})