unpack

type SockaddrInet4 struct {
	Family uint16
	Port   uint16
	Addr   [4]byte
}

type SockaddrInet6 struct {
	Family   uint16
	Port     uint16
	Flowinfo uint32
	Addr     [16]byte
	Scope_id uint32
}

type SockaddrLinklayer struct {
	Family   uint16
	Protocol uint16
	Ifindex  int32
	Hatype   uint16
	Pkttype  uint8
	Halen    uint8
	Addr     [8]uint8
}

type SockaddrNetlink struct {
	Family uint16
	Pad    uint16
	Pid    uint32
	Groups uint32
}

type SockaddrUnix struct {
	Family uint16
	Path   [108]byte
}