You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: breaktcp_linux.go
    path of file: ./repos/sliver/vendor/tailscale.com/ipn/ipnlocal
    
    the code of the file until where you have to start completion: // 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; 
    
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
}