//go:build linux
// +build linux

package transport

import (
	"net"
	"syscall"
)

// bindToInterface returns a Control function that binds connections
// to the specified network interface using SO_BINDTODEVICE.
func bindToInterface(iface string) func(string, string, syscall.RawConn) error {
	return func(network, address string, c syscall.RawConn) error {
		var err error
		c.Control(func(fd uintptr) {
			err = syscall.BindToDevice(int(fd), iface)
		})
		return err
	}
}

// Ensure net import is used
var _ net.Conn