text: /* WINSOCK.H--definitions to be used with the WINSOCK.DLL
   * Copyright (c) 1993-1999, Microsoft Corp. All rights reserved.
   *
   * This header file corresponds to version 1.1 of the Windows Sockets specification.
   *
   * This file includes parts which are Copyright (c) 1982-1986 Regents
   * of the University of California.  All rights reserved.  The
   * Berkeley Software License Agreement specifies the terms and
   * conditions for redistribution.
   *
   */
  
  #ifndef _WINSOCKAPI_
  #pragma option push -b -a8 -pc -A- /*P_O_Push*/
  #define _WINSOCKAPI_
  
  #if _MSC_VER > 1000
  #pragma once
  #endif
  
  /*
   * Pull in WINDOWS.H if necessary
   */
  #ifndef _INC_WINDOWS
  #include <windows.h>
  #endif /* _INC_WINDOWS */
  
  /*
   * Basic system type definitions, taken from the BSD file sys/types.h.
   */
  typedef unsigned char   u_char;
  typedef unsigned short  u_short;
  typedef unsigned int    u_int;
  typedef unsigned long   u_long;
  
  /*
   * The new type to be used in all
   * instances which refer to sockets.
   */
  
  typedef UINT_PTR        SOCKET;
  
  /*
   * Select uses arrays of SOCKETs.  These macros manipulate such
   * arrays.  FD_SETSIZE may be defined by the user before including
   * this file, but the default here should be >= 64.
   *
   * CAVEAT IMPLEMENTOR and USER: THESE MACROS AND TYPES MUST BE
   * INCLUDED IN WINSOCK.H EXACTLY AS SHOWN HERE.
   */
  #ifndef FD_SETSIZE
  #define FD_SETSIZE      64
  #endif /* FD_SETSIZE */
  
  typedef struct fd_set {
          u_int   fd_count;               /* how many are SET? */
          SOCKET  fd_array[FD_SETSIZE];   /* an array of SOCKETs */
  } fd_set;
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  extern int PASCAL FAR __WSAFDIsSet(SOCKET, fd_set FAR *);
  
  #ifdef __cplusplus
  }
  #endif
  
  
  #define FD_CLR(fd, set) do { \
      u_int __i; \
      for (__i = 0; __i < ((fd_set FAR *)(set))->fd_count ; __i++) { \
          if (((fd_set FAR *)(set))->fd_array[__i] == fd) { \
              while (__i < ((fd_set FAR *)(set))->fd_count-1) { \
                  ((fd_set FAR *)(set))->fd_array[__i] = \
                      ((fd_set FAR *)(set))->fd_array[__i+1]; \
                  __i++; \
              } \
              ((fd_set FAR *)(set))->fd_count--; \
              break; \
          } \
      } \
  } while(0)
  
  #define FD_SET(fd, set) do { \
      if (((fd_set FAR *)(set))->fd_count < FD_SETSIZE) \
          ((fd_set FAR *)(set))->fd_array[((fd_set FAR *)(set))->fd_count++]=(fd);\
  } while(0)
  
  #define FD_ZERO(set) (((fd_set FAR *)(set))->fd_count=0)
  
  #define FD_ISSET(fd, set) __WSAFDIsSet((SOCKET)(fd), (fd_set FAR *)(set))
  
  /*
   * Structure used in select() call, taken from the BSD file sys/time.h.
   */
  struct timeval {
          long    tv_sec;         /* seconds */
          long    tv_usec;        /* and microseconds */
  };
  
  /*
   * Operations on timevals.
   *
   * NB: timercmp does not work for >= or <=.
   */
  #define timerisset(tvp)         ((tvp)->tv_sec || (tvp)->tv_usec)
  #define timercmp(tvp, uvp, cmp) \
          ((tvp)->tv_sec cmp (uvp)->tv_sec || \
           (tvp)->tv_sec == (uvp)->tv_sec && (tvp)->tv_usec cmp (uvp)->tv_usec)
  #define timerclear(tvp)         (tvp)->tv_sec = (tvp)->tv_usec = 0
  
  /*
   * Commands for ioctlsocket(),  taken from the BSD file fcntl.h.
   *
   *
   * Ioctl's have the command encoded in the lower word,
   * and the size of any in or out parameters in the upper
   * word.  The high 2 bits of the upper word are used
   * to encode the in/out status of the parameter; for now
   * we restrict parameters to at most 128 bytes.
   */
  #define IOCPARM_MASK    0x7f            /* parameters must be < 128 bytes */
  #define IOC_VOID        0x20000000      /* no parameters */
  #define IOC_OUT         0x40000000      /* copy out parameters */
  #define IOC_IN          0x80000000      /* copy in parameters */
  #define IOC_INOUT       (IOC_IN|IOC_OUT)
                                          /* 0x20000000 distinguishes new &
                                             old ioctl's */
  #define _IO(x,y)        (IOC_VOID|((x)<<8)|(y))
  
  #define _IOR(x,y,t)     (IOC_OUT|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))
  
  #define _IOW(x,y,t)     (IOC_IN|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))
  
  #define FIONREAD    _IOR('f', 127, u_long) /* get # bytes to read */
  #define FIONBIO     _IOW('f', 126, u_long) /* set/clear non-blocking i/o */
  #define FIOASYNC    _IOW('f', 125, u_long) /* set/clear async i/o */
  
  /* Socket I/O Controls */
  #define SIOCSHIWAT  _IOW('s',  0, u_long)  /* set high watermark */
  #define SIOCGHIWAT  _IOR('s',  1, u_long)  /* get high watermark */
  #define SIOCSLOWAT  _IOW('s',  2, u_long)  /* set low watermark */
  #define SIOCGLOWAT  _IOR('s',  3, u_long)  /* get low watermark */
  #define SIOCATMARK  _IOR('s',  7, u_long)  /* at oob mark? */
  
  /*
   * Structures returned by network data base library, taken from the
   * BSD file netdb.h.  All addresses are supplied in host order, and
   * returned in network order (suitable for use in system calls).
   */
  
  struct  hostent {
          char    FAR * h_name;           /* official name of host */
          char    FAR * FAR * h_aliases;  /* alias list */
          short   h_addrtype;             /* host address type */
          short   h_length;               /* length of address */
          char    FAR * FAR * h_addr_list; /* list of addresses */
  #define h_addr  h_addr_list[0]          /* address, for backward compat */
  };
  
  /*
   * It is assumed here that a network number
   * fits in 32 bits.
   */
  struct  netent {
          char    FAR * n_name;           /* official name of net */
          char    FAR * FAR * n_aliases;  /* alias list */
          short   n_addrtype;             /* net address type */
          u_long  n_net;                  /* network # */
  };
  
  struct  servent {
          char    FAR * s_name;           /* official service name */
          char    FAR * FAR * s_aliases;  /* alias list */
  #ifdef _WIN64
          char    FAR * s_proto;          /* protocol to use */
          short   s_port;                 /* port # */
  #else
          short   s_port;                 /* port # */
          char    FAR * s_proto;          /* protocol to use */
  #endif
  };
  
  struct  protoent {
          char    FAR * p_name;           /* official protocol name */
          char    FAR * FAR * p_aliases;  /* alias list */
          short   p_proto;                /* protocol # */
  };
  
  /*
   * Constants and structures defined by the internet system,
   * Per RFC 790, September 1981, taken from the BSD file netinet/in.h.
   */
  
  /*
   * Protocols
   */
  #define IPPROTO_IP              0               /* dummy for IP */
  #define IPPROTO_ICMP            1               /* control message protocol */
  #define IPPROTO_IGMP            2               /* group management protocol */
  #define IPPROTO_GGP             3               /* gateway^2 (deprecated) */
  #define IPPROTO_TCP             6               /* tcp */
  #define IPPROTO_PUP             12              /* pup */
  #define IPPROTO_UDP             17              /* user datagram protocol */
  #define IPPROTO_IDP             22              /* xns idp */
  #define IPPROTO_ND              77              /* UNOFFICIAL net disk proto */
  
  #define IPPROTO_RAW             255             /* raw IP packet */
  #define IPPROTO_MAX             256
  
  /*
   * Port/socket numbers: network standard functions
   */
  #define IPPORT_ECHO             7
  #define IPPORT_DISCARD          9
  #define IPPORT_SYSTAT           11
  #define IPPORT_DAYTIME          13
  #define IPPORT_NETSTAT          15
  #define IPPORT_FTP              21
  #define IPPORT_TELNET           23
  #define IPPORT_SMTP             25
  #define IPPORT_TIMESERVER       37
  #define IPPORT_NAMESERVER       42
  #define IPPORT_WHOIS            43
  #define IPPORT_MTP              57
  
  /*
   * Port/socket numbers: host specific functions
   */
  #define IPPORT_TFTP             69
  #define IPPORT_RJE              77
  #define IPPORT_FINGER           79
  #define IPPORT_TTYLINK          87
  #define IPPORT_SUPDUP           95
  
  /*
   * UNIX TCP sockets
   */
  #define IPPORT_EXECSERVER       512
  #define IPPORT_LOGINSERVER      513
  #define IPPORT_CMDSERVER        514
  #define IPPORT_EFSSERVER        520
  
  /*
   * UNIX UDP sockets
   */
  #define IPPORT_BIFFUDP          512
  #define IPPORT_WHOSERVER        513
  #define IPPORT_ROUTESERVER      520
                                          /* 520+1 also used */
  
  /*
   * Ports < IPPORT_RESERVED are reserved for
   * privileged processes (e.g. root).
   */
  #define IPPORT_RESERVED         1024
  
  /*
   * Link numbers
   */
  #define IMPLINK_IP              155
  #define IMPLINK_LOWEXPER        156
  #define IMPLINK_HIGHEXPER       158
  
  /*
   * Internet address (old style... should be updated)
   */
  struct in_addr {
          union {
                  struct { u_char s_b1,s_b2,s_b3,s_b4; } S_un_b;
                  struct { u_short s_w1,s_w2; } S_un_w;
                  u_long S_addr;
          } S_un;
  #define s_addr  S_un.S_addr
                                  /* can be used for most tcp & ip code */
  #define s_host  S_un.S_un_b.s_b2
                                  /* host on imp */
  #define s_net   S_un.S_un_b.s_b1
                                  /* network */
  #define s_imp   S_un.S_un_w.s_w2
                                  /* imp */
  #define s_impno S_un.S_un_b.s_b4
                                  /* imp # */
  #define s_lh    S_un.S_un_b.s_b3
                                  /* logical host */
  };
  
  /*
   * Definitions of bits in internet address integers.
   * On subnets, the decomposition of addresses to host and net parts
   * is done according to subnet mask, not the masks here.
   */
  #define IN_CLASSA(i)            (((long)(i) & 0x80000000) == 0)
  #define IN_CLASSA_NET           0xff000000
  #define IN_CLASSA_NSHIFT        24
  #define IN_CLASSA_HOST          0x00ffffff
  #define IN_CLASSA_MAX           128
  
  #define IN_CLASSB(i)            (((long)(i) & 0xc0000000) == 0x80000000)
  #define IN_CLASSB_NET           0xffff0000
  #define IN_CLASSB_NSHIFT        16
  #define IN_CLASSB_HOST          0x0000ffff
  #define IN_CLASSB_MAX           65536
  
  #define IN_CLASSC(i)            (((long)(i) & 0xe0000000) == 0xc0000000)
  #define IN_CLASSC_NET           0xffffff00
  #define IN_CLASSC_NSHIFT        8
  #define IN_CLASSC_HOST          0x000000ff
  
  #define INADDR_ANY              (u_long)0x00000000
  #define INADDR_LOOPBACK         0x7f000001
  #define INADDR_BROADCAST        (u_long)0xffffffff
  #define INADDR_NONE             0xffffffff
  
  /*
   * Socket address, internet style.
   */
  struct sockaddr_in {
          short   sin_family;
          u_short sin_port;
          struct  in_addr sin_addr;
          char    sin_zero[8];
  };
  
  #define WSADESCRIPTION_LEN      256
  #define WSASYS_STATUS_LEN       128
  
  typedef struct WSAData {
          WORD                    wVersion;
          WORD                    wHighVersion;
  #ifdef _WIN64
          unsigned short          iMaxSockets;
          unsigned short          iMaxUdpDg;
          char FAR *              lpVendorInfo;
          char                    szDescription[WSADESCRIPTION_LEN+1];
          char                    szSystemStatus[WSASYS_STATUS_LEN+1];
  #else
          char                    szDescription[WSADESCRIPTION_LEN+1];
          char                    szSystemStatus[WSASYS_STATUS_LEN+1];
          unsigned short          iMaxSockets;
          unsigned short          iMaxUdpDg;
          char FAR *              lpVendorInfo;
  #endif
  } WSADATA;
  
  typedef WSADATA FAR *LPWSADATA;
  
  /*
   * Options for use with [gs]etsockopt at the IP level.
   */
  #define IP_OPTIONS          1           /* set/get IP per-packet options    */
  #define IP_MULTICAST_IF     2           /* set/get IP multicast interface   */
  #define IP_MULTICAST_TTL    3           /* set/get IP multicast timetolive  */
  #define IP_MULTICAST_LOOP   4           /* set/get IP multicast loopback    */
  #define IP_ADD_MEMBERSHIP   5           /* add  an IP group membership      */
  #define IP_DROP_MEMBERSHIP  6           /* drop an IP group membership      */
  #define IP_TTL              7           /* set/get IP Time To Live          */
  #define IP_TOS              8           /* set/get IP Type Of Service       */
  #define IP_DONTFRAGMENT     9           /* set/get IP Don't Fragment flag   */
  
  
  #define IP_DEFAULT_MULTICAST_TTL   1    /* normally limit m'casts to 1 hop  */
  #define IP_DEFAULT_MULTICAST_LOOP  1    /* normally hear sends if a member  */
  #define IP_MAX_MEMBERSHIPS         20   /* per socket; must fit in one mbuf */
  
  /*
   * 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 */
  };
  
  /*
   * Definitions related to sockets: types, address families, options,
   * taken from the BSD file sys/socket.h.
   */
  
  /*
   * This is used instead of -1, since the
   * SOCKET type is unsigned.
   */
  #define INVALID_SOCKET  (SOCKET)(~0)
  #define SOCKET_ERROR            (-1)
  
  /*
   * Types
   */
  #define SOCK_STREAM     1               /* stream socket */
  #define SOCK_DGRAM      2               /* datagram socket */
  #define SOCK_RAW        3               /* raw-protocol interface */
  #define SOCK_RDM        4               /* reliably-delivered message */
  #define SOCK_SEQPACKET  5               /* sequenced packet stream */
  
  /*
   * Option flags per-socket.
   */
  #define SO_DEBUG        0x0001          /* turn on debugging info recording */
  #define SO_ACCEPTCONN   0x0002          /* socket has had listen() */
  #define SO_REUSEADDR    0x0004          /* allow local address reuse */
  #define SO_KEEPALIVE    0x0008          /* keep connections alive */
  #define SO_DONTROUTE    0x0010          /* just use interface addresses */
  #define SO_BROADCAST    0x0020          /* permit sending of broadcast msgs */
  #define SO_USELOOPBACK  0x0040          /* bypass hardware when possible */
  #define SO_LINGER       0x0080          /* linger on close if data present */
  #define SO_OOBINLINE    0x0100          /* leave received OOB data in line */
  
  #define SO_DONTLINGER   (u_int)(~SO_LINGER)
  
  /*
   * Additional options.
   */
  #define SO_SNDBUF       0x1001          /* send buffer size */
  #define SO_RCVBUF       0x1002          /* receive buffer size */
  #define SO_SNDLOWAT     0x1003          /* send low-water mark */
  #define SO_RCVLOWAT     0x1004          /* receive low-water mark */
  #define SO_SNDTIMEO     0x1005          /* send timeout */
  #define SO_RCVTIMEO     0x1006          /* receive timeout */
  #define SO_ERROR        0x1007          /* get error status and clear */
  #define SO_TYPE         0x1008          /* get socket type */
  
  /*
   * Options for connect and disconnect data and options.  Used only by
   * non-TCP/IP transports such as DECNet, OSI TP4, etc.
   */
  #define SO_CONNDATA     0x7000
  #define SO_CONNOPT      0x7001
  #define SO_DISCDATA     0x7002
  #define SO_DISCOPT      0x7003
  #define SO_CONNDATALEN  0x7004
  #define SO_CONNOPTLEN   0x7005
  #define SO_DISCDATALEN  0x7006
  #define SO_DISCOPTLEN   0x7007
  
  /*
   * Option for opening sockets for synchronous access.
   */
  #define SO_OPENTYPE     0x7008
  
  #define SO_SYNCHRONOUS_ALERT    0x10
  #define SO_SYNCHRONOUS_NONALERT 0x20
  
  /*
   * Other NT-specific options.
   */
  #define SO_MAXDG        0x7009
  #define SO_MAXPATHDG    0x700A
  #define SO_UPDATE_ACCEPT_CONTEXT 0x700B
  #define SO_CONNECT_TIME 0x700C
  
  /*
   * TCP options.
   */
  #define TCP_NODELAY     0x0001
  #define TCP_BSDURGENT   0x7000
  
  /*
   * Address families.
   */
  #define AF_UNSPEC       0               /* unspecified */
  #define AF_UNIX         1               /* local to host (pipes, portals) */
  #define AF_INET         2               /* internetwork: UDP, TCP, etc. */
  #define AF_IMPLINK      3               /* arpanet imp addresses */
  #define AF_PUP          4               /* pup protocols: e.g. BSP */
  #define AF_CHAOS        5               /* mit CHAOS protocols */
  #define AF_IPX          6               /* IPX and SPX */
  #define AF_NS           6               /* XEROX NS protocols */
  #define AF_ISO          7               /* ISO protocols */
  #define AF_OSI          AF_ISO          /* OSI is ISO */
  #define AF_ECMA         8               /* european computer manufacturers */
  #define AF_DATAKIT      9               /* datakit protocols */
  #define AF_CCITT        10              /* CCITT protocols, X.25 etc */
  #define AF_SNA          11              /* IBM SNA */
  #define AF_DECnet       12              /* DECnet */
  #define AF_DLI          13              /* Direct data link interface */
  #define AF_LAT          14              /* LAT */
  #define AF_HYLINK       15              /* NSC Hyperchannel */
  #define AF_APPLETALK    16              /* AppleTalk */
  #define AF_NETBIOS      17              /* NetBios-style addresses */
  #define AF_VOICEVIEW    18              /* VoiceView */
  #define AF_FIREFOX      19              /* FireFox */
  #define AF_UNKNOWN1     20              /* Somebody is using this! */
  #define AF_BAN          21              /* Banyan */
  
  #define AF_MAX          22
  
  /*
   * Structure used by kernel to store most
   * addresses.
   */
  struct sockaddr {
          u_short sa_family;              /* address family */
          char    sa_data[14];            /* up to 14 bytes of direct address */
  };
  
  /*
   * Structure used by kernel to pass protocol
   * information in raw sockets.
   */
  struct sockproto {
          u_short sp_family;              /* address family */
          u_short sp_protocol;            /* protocol */
  };
  
  /*
   * Protocol families, same as address families for now.
   */
  #define PF_UNSPEC       AF_UNSPEC
  #define PF_UNIX         AF_UNIX
  #define PF_INET         AF_INET
  #define PF_IMPLINK      AF_IMPLINK
  #define PF_PUP          AF_PUP
  #define PF_CHAOS        AF_CHAOS
  #define PF_NS           AF_NS
  #define PF_IPX          AF_IPX
  #define PF_ISO          AF_ISO
  #define PF_OSI          AF_OSI
  #define PF_ECMA         AF_ECMA
  #define PF_DATAKIT      AF_DATAKIT
  #define PF_CCITT        AF_CCITT
  #define PF_SNA          AF_SNA
  #define PF_DECnet       AF_DECnet
  #define PF_DLI          AF_DLI
  #define PF_LAT          AF_LAT
  #define PF_HYLINK       AF_HYLINK
  #define PF_APPLETALK    AF_APPLETALK
  #define PF_VOICEVIEW    AF_VOICEVIEW
  #define PF_FIREFOX      AF_FIREFOX
  #define PF_UNKNOWN1     AF_UNKNOWN1
  #define PF_BAN          AF_BAN
  
  #define PF_MAX          AF_MAX
  
  /*
   * Structure used for manipulating linger option.
   */
  struct  linger {
          u_short l_onoff;                /* option on/off */
          u_short l_linger;               /* linger time */
  };
  
  /*
   * Level number for (get/set)sockopt() to apply to socket itself.
   */
  #define SOL_SOCKET      0xffff          /* options for socket level */
  
  /*
   * Maximum queue length specifiable by listen.
   */
  #define SOMAXCONN       5
  
  #define MSG_OOB         0x1             /* process out-of-band data */
  #define MSG_PEEK        0x2             /* peek at incoming message */
  #define MSG_DONTROUTE   0x4             /* send without using routing tables */
  
  #define MSG_MAXIOVLEN   16
  
  #define MSG_PARTIAL     0x8000          /* partial send or recv for message xport */
  
  /*
   * Define constant based on rfc883, used by gethostbyxxxx() calls.
   */
  #define MAXGETHOSTSTRUCT        1024
  
  /*
   * Define flags to be used with the WSAAsyncSelect() call.
   */
  #define FD_READ         0x01
  #define FD_WRITE        0x02
  #define FD_OOB          0x04
  #define FD_ACCEPT       0x08
  #define FD_CONNECT      0x10
  #define FD_CLOSE        0x20
  
  /*
   * WinSock error codes are also defined in winerror.h
   * Hence the IFDEF.
   */
  #ifndef WSABASEERR
  
  /*
   * All Windows Sockets error constants are biased by WSABASEERR from
   * the "normal"
   */
  #define WSABASEERR              10000
  /*
   * Windows Sockets definitions of regular Microsoft C error constants
   */
  #define WSAEINTR                (WSABASEERR+4)
  #define WSAEBADF                (WSABASEERR+9)
  #define WSAEACCES               (WSABASEERR+13)
  #define WSAEFAULT               (WSABASEERR+14)
  #define WSAEINVAL               (WSABASEERR+22)
  #define WSAEMFILE               (WSABASEERR+24)
  
  /*
   * Windows Sockets definitions of regular Berkeley error constants
   */
  #define WSAEWOULDBLOCK          (WSABASEERR+35)
  #define WSAEINPROGRESS          (WSABASEERR+36)
  #define WSAEALREADY             (WSABASEERR+37)
  #define WSAENOTSOCK             (WSABASEERR+38)
  #define WSAEDESTADDRREQ         (WSABASEERR+39)
  #define WSAEMSGSIZE             (WSABASEERR+40)
  #define WSAEPROTOTYPE           (WSABASEERR+41)
  #define WSAENOPROTOOPT          (WSABASEERR+42)
  #define WSAEPROTONOSUPPORT      (WSABASEERR+43)
  #define WSAESOCKTNOSUPPORT      (WSABASEERR+44)
  #define WSAEOPNOTSUPP           (WSABASEERR+45)
  #define WSAEPFNOSUPPORT         (WSABASEERR+46)
  #define WSAEAFNOSUPPORT         (WSABASEERR+47)
  #define WSAEADDRINUSE           (WSABASEERR+48)
  #define WSAEADDRNOTAVAIL        (WSABASEERR+49)
  #define WSAENETDOWN             (WSABASEERR+50)
  #define WSAENETUNREACH          (WSABASEERR+51)
  #define WSAENETRESET            (WSABASEERR+52)
  #define WSAECONNABORTED         (WSABASEERR+53)
  #define WSAECONNRESET           (WSABASEERR+54)
  #define WSAENOBUFS              (WSABASEERR+55)
  #define WSAEISCONN              (WSABASEERR+56)
  #define WSAENOTCONN             (WSABASEERR+57)
  #define WSAESHUTDOWN            (WSABASEERR+58)
  #define WSAETOOMANYREFS         (WSABASEERR+59)
  #define WSAETIMEDOUT            (WSABASEERR+60)
  #define WSAECONNREFUSED         (WSABASEERR+61)
  #define WSAELOOP                (WSABASEERR+62)
  #define WSAENAMETOOLONG         (WSABASEERR+63)
  #define WSAEHOSTDOWN            (WSABASEERR+64)
  #define WSAEHOSTUNREACH         (WSABASEERR+65)
  #define WSAENOTEMPTY            (WSABASEERR+66)
  #define WSAEPROCLIM             (WSABASEERR+67)
  #define WSAEUSERS               (WSABASEERR+68)
  #define WSAEDQUOT               (WSABASEERR+69)
  #define WSAESTALE               (WSABASEERR+70)
  #define WSAEREMOTE              (WSABASEERR+71)
  
  #define WSAEDISCON              (WSABASEERR+101)
  
  /*
   * Extended Windows Sockets error constant definitions
   */
  #define WSASYSNOTREADY          (WSABASEERR+91)
  #define WSAVERNOTSUPPORTED      (WSABASEERR+92)
  #define WSANOTINITIALISED       (WSABASEERR+93)
  
  /*
   * Error return codes from gethostbyname() and gethostbyaddr()
   * (when using the resolver). Note that these errors are
   * retrieved via WSAGetLastError() and must therefore follow
   * the rules for avoiding clashes with error numbers from
   * specific implementations or language run-time systems.
   * For this reason the codes are based at WSABASEERR+1001.
   * Note also that [WSA]NO_ADDRESS is defined only for
   * compatibility purposes.
   */
  
  
  /* Authoritative Answer: Host not found */
  #define WSAHOST_NOT_FOUND       (WSABASEERR+1001)
  
  /* Non-Authoritative: Host not found, or SERVERFAIL */
  #define WSATRY_AGAIN            (WSABASEERR+1002)
  
  /* Non recoverable errors, FORMERR, REFUSED, NOTIMP */
  #define WSANO_RECOVERY          (WSABASEERR+1003)
  
  /* Valid name, no data record of requested type */
  #define WSANO_DATA              (WSABASEERR+1004)
  
  /*
   * WinSock error codes are also defined in winerror.h
   * Hence the IFDEF.
   */
  #endif /* ifdef WSABASEERR */
  
  /*
   * Compatibility macros.
   */
  
  
  #define h_errno         WSAGetLastError()
  #define HOST_NOT_FOUND          WSAHOST_NOT_FOUND
  #define TRY_AGAIN               WSATRY_AGAIN
  #define NO_RECOVERY             WSANO_RECOVERY
  #define NO_DATA                 WSANO_DATA
  /* no address, look for MX record */
  #define WSANO_ADDRESS           WSANO_DATA
  #define NO_ADDRESS              WSANO_ADDRESS
  
  /*
   * Windows Sockets errors redefined as regular Berkeley error constants.
   * These are commented out in Windows NT to avoid conflicts with errno.h.
   * Use the WSA constants instead.
   */
  #if 0
  #define EWOULDBLOCK             WSAEWOULDBLOCK
  #define EINPROGRESS             WSAEINPROGRESS
  #define EALREADY                WSAEALREADY
  #define ENOTSOCK                WSAENOTSOCK
  #define EDESTADDRREQ            WSAEDESTADDRREQ
  #define EMSGSIZE                WSAEMSGSIZE
  #define EPROTOTYPE              WSAEPROTOTYPE
  #define ENOPROTOOPT             WSAENOPROTOOPT
  #define EPROTONOSUPPORT         WSAEPROTONOSUPPORT
  #define ESOCKTNOSUPPORT         WSAESOCKTNOSUPPORT
  #define EOPNOTSUPP              WSAEOPNOTSUPP
  #define EPFNOSUPPORT            WSAEPFNOSUPPORT
  #define EAFNOSUPPORT            WSAEAFNOSUPPORT
  #define EADDRINUSE              WSAEADDRINUSE
  #define EADDRNOTAVAIL           WSAEADDRNOTAVAIL
  #define ENETDOWN                WSAENETDOWN
  #define ENETUNREACH             WSAENETUNREACH
  #define ENETRESET               WSAENETRESET
  #define ECONNABORTED            WSAECONNABORTED
  #define ECONNRESET              WSAECONNRESET
  #define ENOBUFS                 WSAENOBUFS
  #define EISCONN                 WSAEISCONN
  #define ENOTCONN                WSAENOTCONN
  #define ESHUTDOWN               WSAESHUTDOWN
  #define ETOOMANYREFS            WSAETOOMANYREFS
  #define ETIMEDOUT               WSAETIMEDOUT
  #define ECONNREFUSED            WSAECONNREFUSED
  #define ELOOP                   WSAELOOP
  #define ENAMETOOLONG            WSAENAMETOOLONG
  #define EHOSTDOWN               WSAEHOSTDOWN
  #define EHOSTUNREACH            WSAEHOSTUNREACH
  #define ENOTEMPTY               WSAENOTEMPTY
  #define EPROCLIM                WSAEPROCLIM
  #define EUSERS                  WSAEUSERS
  #define EDQUOT                  WSAEDQUOT
  #define ESTALE                  WSAESTALE
  #define EREMOTE                 WSAEREMOTE
  #endif
  
  /* Socket function prototypes */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  SOCKET PASCAL FAR accept (
                            IN SOCKET s,
                            OUT struct sockaddr FAR *addr,
                            IN OUT int FAR *addrlen);
  
  int PASCAL FAR bind (
                       IN SOCKET s,
                       IN const struct sockaddr FAR *addr,
                       IN int namelen);
  
  int PASCAL FAR closesocket ( IN SOCKET s);
  
  int PASCAL FAR connect (
                          IN SOCKET s,
                          IN const struct sockaddr FAR *name,
                          IN int namelen);
  
  int PASCAL FAR ioctlsocket (
                              IN SOCKET s,
                              IN long cmd,
                              IN OUT u_long FAR *argp);
  
  int PASCAL FAR getpeername (
                              IN SOCKET s,
                              OUT struct sockaddr FAR *name,
                              IN OUT int FAR * namelen);
  
  int PASCAL FAR getsockname (
                              IN SOCKET s,
                              OUT struct sockaddr FAR *name,
                              IN OUT int FAR * namelen);
  
  int PASCAL FAR getsockopt (
                             IN SOCKET s,
                             IN int level,
                             IN int optname,
                             OUT char FAR * optval,
                             IN OUT int FAR *optlen);
  
  u_long PASCAL FAR htonl ( IN u_long hostlong);
  
  u_short PASCAL FAR htons (IN u_short hostshort);
  
  unsigned long PASCAL FAR inet_addr (IN const char FAR * cp);
  
  char FAR * PASCAL FAR inet_ntoa (IN struct in_addr in);
  
  int PASCAL FAR listen (
                         IN SOCKET s,
                         IN int backlog);
  
  u_long PASCAL FAR ntohl (IN u_long netlong);
  
  u_short PASCAL FAR ntohs (IN u_short netshort);
  
  int PASCAL FAR recv (
                       IN SOCKET s,
                       OUT char FAR * buf,
                       IN int len,
                       IN int flags);
  
  int PASCAL FAR recvfrom (
                           IN SOCKET s,
                           OUT char FAR * buf,
                           IN int len,
                           IN int flags,
                           OUT struct sockaddr FAR *from,
                           IN OUT int FAR * fromlen);
  
  int PASCAL FAR select (
                          IN int nfds,
                          IN OUT fd_set FAR *readfds,
                          IN OUT fd_set FAR *writefds,
                          IN OUT fd_set FAR *exceptfds,
                          IN const struct timeval FAR *timeout);
  
  int PASCAL FAR send (
                       IN SOCKET s,
                       IN const char FAR * buf,
                       IN int len,
                       IN int flags);
  
  int PASCAL FAR sendto (
                         IN SOCKET s,
                         IN const char FAR * buf,
                         IN int len,
                         IN int flags,
                         IN const struct sockaddr FAR *to,
                         IN int tolen);
  
  int PASCAL FAR setsockopt (
                             IN SOCKET s,
                             IN int level,
                             IN int optname,
                             IN const char FAR * optval,
                             IN int optlen);
  
  int PASCAL FAR shutdown (
                           IN SOCKET s,
                           IN int how);
  
  SOCKET PASCAL FAR socket (
                            IN int af,
                            IN int type,
                            IN int protocol);
  
  /* Database function prototypes */
  
  struct hostent FAR * PASCAL FAR gethostbyaddr(
                                                IN const char FAR * addr,
                                                IN int len,
                                                IN int type);
  
  struct hostent FAR * PASCAL FAR gethostbyname(IN const char FAR * name);
  
  int PASCAL FAR gethostname (
                              OUT char FAR * name,
                              IN int namelen);
  
  struct servent FAR * PASCAL FAR getservbyport(
                                                IN int port,
                                                IN const char FAR * proto);
  
  struct servent FAR * PASCAL FAR getservbyname(
                                                IN const char FAR * name,
                                                IN const char FAR * proto);
  
  struct protoent FAR * PASCAL FAR getprotobynumber(IN int proto);
  
  struct protoent FAR * PASCAL FAR getprotobyname(IN const char FAR * name);
  
  /* Microsoft Windows Extension function prototypes */
  
  int PASCAL FAR WSAStartup(
                            IN WORD wVersionRequired,
                            OUT LPWSADATA lpWSAData);
  
  int PASCAL FAR WSACleanup(void);
  
  void PASCAL FAR WSASetLastError(IN int iError);
  
  int PASCAL FAR WSAGetLastError(void);
  
  BOOL PASCAL FAR WSAIsBlocking(void);
  
  int PASCAL FAR WSAUnhookBlockingHook(void);
  
  FARPROC PASCAL FAR WSASetBlockingHook(IN FARPROC lpBlockFunc);
  
  int PASCAL FAR WSACancelBlockingCall(void);
  
  HANDLE PASCAL FAR WSAAsyncGetServByName(
                                          IN HWND hWnd,
                                          IN u_int wMsg,
                                          IN const char FAR * name,
                                          IN const char FAR * proto,
                                          OUT char FAR * buf,
                                          IN int buflen);
  
  HANDLE PASCAL FAR WSAAsyncGetServByPort(
                                          IN HWND hWnd,
                                          IN u_int wMsg,
                                          IN int port,
                                          IN const char FAR * proto,
                                          OUT char FAR * buf,
                                          IN int buflen);
  
  HANDLE PASCAL FAR WSAAsyncGetProtoByName(
                                           IN HWND hWnd,
                                           IN u_int wMsg,
                                           IN const char FAR * name,
                                           OUT char FAR * buf,
                                           IN int buflen);
  
  HANDLE PASCAL FAR WSAAsyncGetProtoByNumber(
                                             IN HWND hWnd,
                                             IN u_int wMsg,
                                             IN int number,
                                             OUT char FAR * buf,
                                             IN int buflen);
  
  HANDLE PASCAL FAR WSAAsyncGetHostByName(
                                          IN HWND hWnd,
                                          IN u_int wMsg,
                                          IN const char FAR * name,
                                          OUT char FAR * buf,
                                          IN int buflen);
  
  HANDLE PASCAL FAR WSAAsyncGetHostByAddr(
                                          IN HWND hWnd,
                                          IN u_int wMsg,
                                          IN const char FAR * addr,
                                          IN int len,
                                          IN int type,
                                          OUT char FAR * buf,
                                          IN int buflen);
  
  int PASCAL FAR WSACancelAsyncRequest(IN HANDLE hAsyncTaskHandle);
  
  int PASCAL FAR WSAAsyncSelect(
                                IN SOCKET s,
                                IN HWND hWnd,
                                IN u_int wMsg,
                                IN long lEvent);
  
  int PASCAL FAR WSARecvEx (
                            IN SOCKET s,
                            OUT char FAR * buf,
                            IN int len,
                            IN OUT int FAR *flags);
  
  typedef struct _TRANSMIT_FILE_BUFFERS {
      PVOID Head;
      DWORD HeadLength;
      PVOID Tail;
      DWORD TailLength;
  } TRANSMIT_FILE_BUFFERS, *PTRANSMIT_FILE_BUFFERS, *LPTRANSMIT_FILE_BUFFERS;
  
  #define TF_DISCONNECT       0x01
  #define TF_REUSE_SOCKET     0x02
  #define TF_WRITE_BEHIND     0x04
  
  BOOL
  PASCAL FAR
  TransmitFile (
      IN SOCKET hSocket,
      IN HANDLE hFile,
      IN DWORD nNumberOfBytesToWrite,
      IN DWORD nNumberOfBytesPerSend,
      IN LPOVERLAPPED lpOverlapped,
      IN LPTRANSMIT_FILE_BUFFERS lpTransmitBuffers,
      IN DWORD dwReserved
      );
  
  BOOL
  PASCAL FAR
  AcceptEx (
      IN SOCKET sListenSocket,
      IN SOCKET sAcceptSocket,
      IN PVOID lpOutputBuffer,
      IN DWORD dwReceiveDataLength,
      IN DWORD dwLocalAddressLength,
      IN DWORD dwRemoteAddressLength,
      OUT LPDWORD lpdwBytesReceived,
      IN LPOVERLAPPED lpOverlapped
      );
  
  VOID
  PASCAL FAR
  GetAcceptExSockaddrs (
      IN PVOID lpOutputBuffer,
      IN DWORD dwReceiveDataLength,
      IN DWORD dwLocalAddressLength,
      IN DWORD dwRemoteAddressLength,
      OUT struct sockaddr **LocalSockaddr,
      OUT LPINT LocalSockaddrLength,
      OUT struct sockaddr **RemoteSockaddr,
      OUT LPINT RemoteSockaddrLength
      );
  
  #ifdef __cplusplus
  }
  #endif
  
  /* Microsoft Windows Extended data types */
  typedef struct sockaddr SOCKADDR;
  typedef struct sockaddr *PSOCKADDR;
  typedef struct sockaddr FAR *LPSOCKADDR;
  
  typedef struct sockaddr_in SOCKADDR_IN;
  typedef struct sockaddr_in *PSOCKADDR_IN;
  typedef struct sockaddr_in FAR *LPSOCKADDR_IN;
  
  typedef struct linger LINGER;
  typedef struct linger *PLINGER;
  typedef struct linger FAR *LPLINGER;
  
  typedef struct in_addr IN_ADDR;
  typedef struct in_addr *PIN_ADDR;
  typedef struct in_addr FAR *LPIN_ADDR;
  
  typedef struct fd_set FD_SET;
  typedef struct fd_set *PFD_SET;
  typedef struct fd_set FAR *LPFD_SET;
  
  typedef struct hostent HOSTENT;
  typedef struct hostent *PHOSTENT;
  typedef struct hostent FAR *LPHOSTENT;
  
  typedef struct servent SERVENT;
  typedef struct servent *PSERVENT;
  typedef struct servent FAR *LPSERVENT;
  
  typedef struct protoent PROTOENT;
  typedef struct protoent *PPROTOENT;
  typedef struct protoent FAR *LPPROTOENT;
  
  typedef struct timeval TIMEVAL;
  typedef struct timeval *PTIMEVAL;
  typedef struct timeval FAR *LPTIMEVAL;
  
  /*
   * Windows message parameter composition and decomposition
   * macros.
   *
   * WSAMAKEASYNCREPLY is intended for use by the Windows Sockets implementation
   * when constructing the response to a WSAAsyncGetXByY() routine.
   */
  #define WSAMAKEASYNCREPLY(buflen,error)     MAKELONG(buflen,error)
  /*
   * WSAMAKESELECTREPLY is intended for use by the Windows Sockets implementation
   * when constructing the response to WSAAsyncSelect().
   */
  #define WSAMAKESELECTREPLY(event,error)     MAKELONG(event,error)
  /*
   * WSAGETASYNCBUFLEN is intended for use by the Windows Sockets application
   * to extract the buffer length from the lParam in the response
   * to a WSAGetXByY().
   */
  #define WSAGETASYNCBUFLEN(lParam)           LOWORD(lParam)
  /*
   * WSAGETASYNCERROR is intended for use by the Windows Sockets application
   * to extract the error code from the lParam in the response
   * to a WSAGetXByY().
   */
  #define WSAGETASYNCERROR(lParam)            HIWORD(lParam)
  /*
   * WSAGETSELECTEVENT is intended for use by the Windows Sockets application
   * to extract the event code from the lParam in the response
   * to a WSAAsyncSelect().
   */
  #define WSAGETSELECTEVENT(lParam)           LOWORD(lParam)
  /*
   * WSAGETSELECTERROR is intended for use by the Windows Sockets application
   * to extract the error code from the lParam in the response
   * to a WSAAsyncSelect().
   */
  #define WSAGETSELECTERROR(lParam)           HIWORD(lParam)
  
  #pragma option pop /*P_O_Pop*/
  #endif  /* _WINSOCKAPI_ */
  
  
  