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/*
**      $Id$
**
**      WS2TCPIP.H - WinSock2 Extension for TCP/IP protocols
**
**      This file contains TCP/IP specific information for use
**      by WinSock2 compatible applications.
**
**      To provide the backward compatibility, all the TCP/IP
**      specific definitions that were included in the WINSOCK.H
**       file are now included in WINSOCK2.H file. WS2TCPIP.H
**      file includes only the definitions  introduced in the
**      "WinSock 2 Protocol-Specific Annex" document.
**
**      Rev 0.3 Nov 13, 1995
*/

#ifndef _WS2TCPIP_H_
#define _WS2TCPIP_H_

/* Structure to keep interface specific information */

typedef struct _INTERFACE_INFO
{
        u_long          iiFlags;                /* Interface flags */
        struct sockaddr iiAddress;              /* Interface address */
        struct sockaddr iiBroadcastAddress;     /* Broadcast address */
        struct sockaddr iiNetmask;              /* Network mask */
} INTERFACE_INFO, FAR * LPINTERFACE_INFO;

/* Possible flags for the  iiFlags - bitmask  */

#define IFF_UP          0x00000001 /* Interface is up */
#define IFF_BROADCAST   0x00000002 /* Broadcast is  supported */
#define IFF_LOOPBACK    0x00000004 /* this is loopback interface */
#define IFF_POINTTOPOINT 0x00000008 /*this is point-to-point
interface*/
#define IFF_MULTICAST   0x00000010 /* multicast is supported */

/* Argument structure for IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP */

struct ip_mreq {
        struct in_addr imr_multiaddr;   /* IP multicast address of group */
        struct in_addr imr_interface;   /* local IP address of interface */
};

/* TCP/IP specific Ioctl codes */

#define SIO_GET_INTERFACE_LIST  _IOR('t', 127, u_long) // <TBD>

/* Option to use with [gs]etsockopt at the IPPROTO_IP level */

#define IP_OPTIONS                      1 /* set/get IP options */
#define IP_HDRINCL                      2 /* header is included with data */
#define IP_TOS                  3 /* IP type of service and preced*/
#define IP_TTL                  4 /* IP time to live */
#define IP_MULTICAST_IF         9 /* set/get IP multicast i/f  */
#define IP_MULTICAST_TTL             10 /* set/get IP multicast ttl */
#define IP_MULTICAST_LOOP            11 /*set/get IP multicast loopback */
#define IP_ADD_MEMBERSHIP            12 /* add an IP group membership */
#define IP_DROP_MEMBERSHIP     13/* drop an IP group membership */


/* Option to use with [gs]etsockopt at the IPPROTO_UDP level */

#define UDP_NOCHECKSUM  1

/* Option to use with [gs]etsockopt at the IPPROTO_TCP level */

#define  TCP_EXPEDITED_1122     0x0002


/* IPv6 definitions */

struct in_addr6 {
                u_char  s6_addr[16];    /* IPv6 address */
};

struct sockaddr_in6 {
                short           sin6_family;   /* AF_INET6 */
                u_short         sin6_port;         /* Transport level port numb
er */
                u_long  sin6_flowinfo; /* IPv6 flow information */
                struct in_addr6         sin6_addr; /* IPv6 address */
};


#endif  /* _WS2TCPIP_H_ */