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cmd/tailscale/cli: actually perform Noise request in 'debug ts2021'

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This actually performs a Noise request in the 'debug ts2021' command,
instead of just exiting once we've dialed a connection. This can help
debug certain forms of captive portals and deep packet inspection that
will allow a connection, but will RST the connection when trying to send
data on the post-upgraded TCP connection.

Updates #1634

Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I1e46ca9c9a0751c55f16373a6a76cdc24fec1f18
This commit is contained in:
Andrew Dunham
2024-06-19 18:30:55 -04:00
parent 732605f961
commit 24976b5bfd
6 changed files with 107 additions and 63 deletions
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6
control/controlclient/noise.go
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@@ -174,12 +174,12 @@ func (nc *NoiseClient) GetSingleUseRoundTripper(ctx context.Context) (http.Round
if err != nil {
return nil, nil, err
}
rt, earlyPayloadMaybeNil, err := conn.ReserveNewRequest(ctx)
ok, earlyPayloadMaybeNil, err := conn.ReserveNewRequest(ctx)
if err != nil {
return nil, nil, err
}
if rt != nil {
return rt, earlyPayloadMaybeNil, nil
if ok {
return conn, earlyPayloadMaybeNil, nil
}
}
return nil, nil, errors.New("[unexpected] failed to reserve a request on a connection")