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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package ipnlocal
import (
"log"
"golang.org/x/sys/unix"
)
func init() {
breakTCPConns = breakTCPConnsLinux
}
func breakTCPConnsLinux() error {
var matched int
for fd := 0; fd < 1000; fd++ {
_, err := unix.GetsockoptTCPInfo(fd, unix.IPPROTO_TCP, unix.TCP_INFO)
if err == nil {
matched++
err = unix.Close(fd)
log.Printf("debug: closed TCP fd %v: %v", fd, err)
}
}
if matched == 0 {
log.Printf("debug: no TCP connections found")
}
return nil
}
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