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various: disable MPTCP when setting TCP_USER_TIMEOUT sockopt (#15063)

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There's nothing about it on
https://github.com/multipath-tcp/mptcp_net-next/issues/ but empirically
MPTCP doesn't support this option on awly's kernel 6.13.2 and in GitHub
actions.

Updates #15015

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
This commit is contained in:
Andrew Lytvynov 2025-02-19 10:41:45 -08:00 committed by GitHub
parent 09982e1918
commit 323747c3e0
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2 changed files with 10 additions and 2 deletions
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3
cmd/derper/derper.go
View File

@ -324,6 +324,9 @@ func main() {
Control: ktimeout.UserTimeout(*tcpUserTimeout),
KeepAlive: *tcpKeepAlive,
}
// As of 2025-02-19, MPTCP does not support TCP_USER_TIMEOUT socket option
// set in ktimeout.UserTimeout above.
lc.SetMultipathTCP(false)
quietLogger := log.New(logger.HTTPServerLogFilter{Inner: log.Printf}, "", 0)
httpsrv := &http.Server{

9
net/ktimeout/ktimeout_linux_test.go
View File

@ -4,17 +4,22 @@
package ktimeout
import (
"context"
"net"
"testing"
"time"
"golang.org/x/net/nettest"
"golang.org/x/sys/unix"
"tailscale.com/util/must"
)
func TestSetUserTimeout(t *testing.T) {
l := must.Get(nettest.NewLocalListener("tcp"))
lc := net.ListenConfig{}
// As of 2025-02-19, MPTCP does not support TCP_USER_TIMEOUT socket option
// set in ktimeout.UserTimeout above.
lc.SetMultipathTCP(false)
l := must.Get(lc.Listen(context.Background(), "tcp", "localhost:0"))
defer l.Close()
var err error