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// +build freebsd openbsd netbsd
package dhcpv4
import (
"net"
"syscall"
)
// BindToInterface emulates linux's SO_BINDTODEVICE option for a socket by using
// IP_RECVIF.
func BindToInterface(fd int, ifname string) error {
iface, err := net.InterfaceByName(ifname)
if err != nil {
return err
}
return syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_RECVIF, iface.Index)
}
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