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