IPV6_MULTICAST_LOOP = 0xb
	IPV6_JOIN_GROUP     = 0xc
	IPV6_LEAVE_GROUP    = 0xd

	SOMAXCONN = 0x7fffffff

	TCP_NODELAY = 1

	SHUT_RD   = 0
	SHUT_WR   = 1
	SHUT_RDWR = 2

	WSADESCRIPTION_LEN = 256
	WSASYS_STATUS_LEN  = 128
)

type WSABuf struct {
	Len uint32
	Buf *byte
}

// Invented values to support what package os expects.
const (
	S_IFMT   = 0x1f000

	UDP_SEND_MSG_SIZE           = 2
	UDP_RECV_MAX_COALESCED_SIZE = 3
	UDP_CHECKSUM_COVERAGE       = 20

	UDP_COALESCED_INFO = 3

	SHUT_RD   = 0
	SHUT_WR   = 1
	SHUT_RDWR = 2

	WSADESCRIPTION_LEN = 256
	WSASYS_STATUS_LEN  = 128
)

type WSABuf struct {
	Len uint32
	Buf *byte
}

type WSAMsg struct {
	Name        *syscall.RawSockaddrAny
	Namelen     int32

		{"WOPTSCHECKED", Const, 1},
		{"WORDSIZE", Const, 0},
		{"WSABuf", Type, 0},
		{"WSABuf.Buf", Field, 0},
		{"WSABuf.Len", Field, 0},
		{"WSACleanup", Func, 0},
		{"WSADESCRIPTION_LEN", Const, 0},
		{"WSAData", Type, 0},
		{"WSAData.Description", Field, 0},
		{"WSAData.HighVersion", Field, 0},
		{"WSAData.MaxSockets", Field, 0},
		{"WSAData.MaxUdpDg", Field, 0},