/*
**  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 0.2 Aug 10, 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 */
#define IP_DONTFRAGMENT     14 /* don't fragment IP datagrams */

/* 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

#endif  /* _WS2TCPIP_H_ */

