}

func (a *IPAddr) toLocal(net string) sockaddr {
	return &IPAddr{loopbackIP(net), a.Zone}
}

func (c *IPConn) readFrom(b []byte) (int, *IPAddr, error) {
	// TODO(cw,rsc): consider using readv if we know the family
	// type to avoid the header trim/copy
	var addr *IPAddr
	n, sa, err := c.fd.readFrom(b)
	switch sa := sa.(type) {
	case *syscall.SockaddrInet4:
		addr = &IPAddr{IP: sa.Addr[0:]}

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	_HIDIOCGRAWPHYS                  = 0x80404805
	_HIDIOCGRAWUNIQ                  = 0x80404808
)

// Errors
const (
	EADDRINUSE      = syscall.Errno(0x62)
	EADDRNOTAVAIL   = syscall.Errno(0x63)
	EADV            = syscall.Errno(0x44)
	EAFNOSUPPORT    = syscall.Errno(0x61)
	EALREADY        = syscall.Errno(0x72)
	EBADE           = syscall.Errno(0x34)
	EBADFD          = syscall.Errno(0x4d)

	WUNTRACED                     = 0x4
)

// Errors
const (
	E2BIG           = Errno(0x7)
	EACCES          = Errno(0xd)
	EADDRINUSE      = Errno(0x7d)
	EADDRNOTAVAIL   = Errno(0x7e)
	EADV            = Errno(0x44)
	EAFNOSUPPORT    = Errno(0x7c)
	EAGAIN          = Errno(0xb)
	EALREADY        = Errno(0x95)
	EBADE           = Errno(0x32)
	EBADF           = Errno(0x9)
	EBADFD          = Errno(0x51)