for i := range data {
			data[i] = 0xfe
		}
		n, err = r.ReadAt(data[:cap(data)], 0)
		if n != len(data) || err != io.EOF {
			return fmt.Errorf("ReadAt(%d, 0) = %v, %v, want %d, EOF", cap(data), n, err, len(data))
		}
		if !bytes.Equal(data, content) {
			return fmt.Errorf("ReadAt(%d, 0) = %q\n\twant %q", len(data), data, content)
		}

		for i := range data {
			data[i] = 0xfe
		}
		for i := range data {

	0x54, 0xc3, 0x84, 0x12, 0x8a, 0x79, 0xbf, 0xe8, 0x4a, 0x4f, 0x1e, 0xfc, 0x14, 0xfe, 0xa5, 0x57,
	0x78, 0x3c, 0x7b, 0xe2, 0x8d, 0xae, 0x61, 0x0e, 0xf7, 0x1d, 0x58, 0x47, 0x12, 0x3c, 0x34, 0x61,
	0x4c, 0xd0, 0x1e, 0x3a, 0x1c, 0xcd, 0xbf, 0x91, 0xec, 0xe3, 0xad, 0xd8, 0x92, 0x97, 0x12, 0xea,
	0xbb, 0xe4, 0x9f, 0xf7, 0x37, 0xa3, 0x78, 0xfe, 0xa5, 0xa5, 0x07, 0x78, 0xfb, 0x27, 0xd0, 0x6a,

	{IP.IsPrivate, IP{0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, false},
	{IP.IsPrivate, IP{0xfc, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, true},
	{IP.IsPrivate, IP{0xfc, 0xff, 0x12, 0, 0, 0, 0, 0x44, 0, 0, 0, 0, 0, 0, 0, 0}, true},
	{IP.IsPrivate, IP{0xfd, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, true},

	0x2e, 0x86, 0xf4, 0xed, 0xf8, 0x13, 0x08, 0xfb, 0x1a, 0x2c, 0x8f, 0xc2, 0xe5, 0xed, 0x71, 0x50,
	0xde, 0x1e, 0xe3, 0xba, 0x17, 0x6f, 0x55, 0xc3, 0x4b, 0xbc, 0x6f, 0x14, 0x88, 0xee, 0x9e, 0x57,
	0x3f, 0xa7, 0xbb, 0xee, 0x4e, 0xdb, 0x5b, 0x5e, 0x28, 0x10, 0xd1, 0xfd, 0xca, 0x65, 0xdf, 0x55,
	0xb1, 0xd7, 0x1c, 0x7c, 0x47, 0xf8, 0x71, 0x7b, 0xfc, 0x95, 0x34, 0x36, 0xfc, 0xd0, 0x0a, 0x46,

0xb2, 0x7f, 0xfe, 0x3e, 0x43, 0xf2, 0xf8, 0xc4, 0x4, 0x91, 0xd9, 0xee, 0x2e, 0x1, 0x6, 0xc5, 0x1, 0x4b, 0x82, 0xa4, 0x54, 0x79, 0x70, 0x65, 0x1, 0xa5, 0x56, 0x32, 0x4f, 0x62, 0x6a, 0xde, 0x0, 0x11, 0xa2, 0x49, 0x44, 0xc4, 0x10, 0xe6, 0xb4, 0xa8, 0xe0, 0xc6, 0x3d, 0x40, 0x7a, 0x87, 0x61, 0xf2, 0x43, 0x41, 0xdf, 0xcb, 0x93, 0xa4, 0x44, 0x44, 0x69, 0x72, 0xc4, 0x10, 0xfd, 0x76, 0xe, 0x16, 0xfc, 0x17, 0x4d, 0x38, 0xbc, 0xac, 0x18, 0xde, 0x36, 0xae, 0xd7, 0x48, 0xa6, 0x45, 0x63, 0x41, 0x6c, 0x67, 0x6f,...

	IFLA_MAP            = 0xe
	IFLA_WEIGHT         = 0xf
	IFLA_OPERSTATE      = 0x10
	IFLA_LINKMODE       = 0x11
	IFLA_LINKINFO       = 0x12
	IFLA_NET_NS_PID     = 0x13
	IFLA_IFALIAS        = 0x14
	IFLA_MAX            = 0x22
	RT_SCOPE_UNIVERSE   = 0x0
	RT_SCOPE_SITE       = 0xc8
	RT_SCOPE_LINK       = 0xfd
	RT_SCOPE_HOST       = 0xfe
	RT_SCOPE_NOWHERE    = 0xff
	RT_TABLE_UNSPEC     = 0x0

	0xd4, 0x53, 0x42, 0xda, 0xae, 0x0d, 0x15, 0xb5, 0xb9, 0x00, 0xb3, 0x3b, 0x56, 0x6d, 0xfb, 0xef,
	0x4c, 0xe3, 0x31, 0xfb, 0xc6, 0xf5, 0x41, 0xdc, 0x99, 0xc1, 0xad, 0x13, 0x07, 0x42, 0xd3, 0x03,
	0xc9, 0x26, 0xb9, 0xcc, 0x69, 0x2e, 0xd1, 0xf1, 0xa5, 0xeb, 0xc1, 0x98, 0xe1, 0x9f, 0x97, 0x0c,
	0xa1, 0x7d, 0x03, 0x1e, 0x1b, 0xf5, 0xd5, 0x3e, 0x17, 0x51, 0xfe, 0x28, 0xbe, 0x04, 0x7c, 0x85,

		// "3ffe::/16"
		Prefix:     netip.PrefixFrom(netip.AddrFrom16([16]byte{0x3f, 0xfe}), 16),
		Precedence: 1,
		Label:      12,
	},
	{
		// "fec0::/10"
		Prefix:     netip.PrefixFrom(netip.AddrFrom16([16]byte{0xfe, 0xc0}), 10),
		Precedence: 1,
		Label:      11,
	},
	{
		// "fc00::/7"
		Prefix:     netip.PrefixFrom(netip.AddrFrom16([16]byte{0xfc}), 7),
		Precedence: 3,
		Label:      13,
	},
	{
		// "::/0"

			0x2c, 0x59, 0x15, 0x65, 0x51, 0x84, 0x87, 0xfe,
			0x08, 0x4d, 0x0e, 0x3f, 0x03, 0xde, 0xbc, 0xc9,
			0xda, 0x1c, 0xe9, 0x0d, 0x08, 0x5c, 0x2d, 0x8a,
			0x19, 0xd8, 0x37, 0x30, 0x86, 0x16, 0x36, 0x92,
			0x14, 0x2b, 0xd8, 0xfc, 0x5d, 0x7a, 0x73, 0x49,
			0x6a, 0x8e, 0x59, 0xee, 0x7e, 0xcf, 0x6b, 0x94,
			0x06, 0x63, 0xf4, 0xa6, 0xbe, 0xe6, 0x5b, 0xd2,
			0xc8, 0x5c, 0x46, 0x98, 0x6c, 0x1b, 0xef, 0x34,

	IFLA_MAP            = 0xe
	IFLA_WEIGHT         = 0xf
	IFLA_OPERSTATE      = 0x10
	IFLA_LINKMODE       = 0x11
	IFLA_LINKINFO       = 0x12
	IFLA_NET_NS_PID     = 0x13
	IFLA_IFALIAS        = 0x14
	IFLA_MAX            = 0x22
	RT_SCOPE_UNIVERSE   = 0x0
	RT_SCOPE_SITE       = 0xc8
	RT_SCOPE_LINK       = 0xfd
	RT_SCOPE_HOST       = 0xfe
	RT_SCOPE_NOWHERE    = 0xff
	RT_TABLE_UNSPEC     = 0x0