mstcpip.h

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//  Copyright (C) Microsoft Corporation, 1996-1999
#if _MSC_VER > 1000
#pragma once
#endif

/* Argument structure for SIO_KEEPALIVE_VALS */

struct tcp_keepalive {
    u_long  onoff;
    u_long  keepalivetime;
    u_long  keepaliveinterval;
};

// New WSAIoctl Options

#define SIO_RCVALL            _WSAIOW(IOC_VENDOR,1)
#define SIO_RCVALL_MCAST      _WSAIOW(IOC_VENDOR,2)
#define SIO_RCVALL_IGMPMCAST  _WSAIOW(IOC_VENDOR,3)
#define SIO_KEEPALIVE_VALS    _WSAIOW(IOC_VENDOR,4)
#define SIO_ABSORB_RTRALERT   _WSAIOW(IOC_VENDOR,5)
#define SIO_UCAST_IF          _WSAIOW(IOC_VENDOR,6)
#define SIO_LIMIT_BROADCASTS  _WSAIOW(IOC_VENDOR,7)
#define SIO_INDEX_BIND        _WSAIOW(IOC_VENDOR,8)
#define SIO_INDEX_MCASTIF     _WSAIOW(IOC_VENDOR,9)
#define SIO_INDEX_ADD_MCAST   _WSAIOW(IOC_VENDOR,10)
#define SIO_INDEX_DEL_MCAST   _WSAIOW(IOC_VENDOR,11)