diff options
| -rw-r--r-- | cmd/tailscale/cli/debug.go | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/cmd/tailscale/cli/debug.go b/cmd/tailscale/cli/debug.go index b3170d000..8c77a52cb 100644 --- a/cmd/tailscale/cli/debug.go +++ b/cmd/tailscale/cli/debug.go @@ -1116,6 +1116,34 @@ func tryConnect(ctx context.Context, controlPublic key.MachinePublic, noiseDiale log.Printf("final underlying conn: %v / %v", conn.LocalAddr(), conn.RemoteAddr()) + log.Printf("Reading header...") + t0 := time.Now() + hdr := make([]byte, 9) + n, err := io.ReadFull(conn, hdr) // just to verify conn is usable + if err != nil { + log.Printf("Read error: %v", err) + } + //log.Fatalf("Read = %d %q, %v (after %v)", n, hdr[:n], err, time.Since(t0)) + + epLen := binary.BigEndian.Uint32(hdr[5:]) + if epLen > 10<<20 { + log.Fatal("invalid early payload length") + } + payBuf := make([]byte, epLen) + if _, err := io.ReadFull(conn, payBuf); err != nil { + log.Fatal(err) + } + log.Printf("got %d-byte early payload: %s", len(payBuf), payBuf) + + t0 = time.Now() + for { + n, err = io.ReadFull(conn, hdr) // just to verify conn is usable + log.Printf("Read = %d %q, %v (after %v)", n, hdr[:n], err, time.Since(t0)) + if err != nil { + log.Fatal(err) + } + } + h2Transport, err := http2.ConfigureTransports(&http.Transport{ IdleConnTimeout: time.Second, }) |