gcc/ada/3wsocthi.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                    G N A T . S O C K E T S . T H I N                     --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.16 $
  10 --                                                                          --
  11 --              Copyright (C) 2001 Ada Core Technologies, Inc.              --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com).   --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This version is for NT.
  36
  37 with Interfaces.C.Pointers;
  38 with Interfaces.C.Strings;
  39
  40 with GNAT.Sockets.Constants;
  41
  42 with System;
  43
  44 package GNAT.Sockets.Thin is
  45
  46    --  ??? far more comments required ???
  47
  48    package C renames Interfaces.C;
  49
  50    use type C.int;
  51    --  So that we can declare the Failure constant below.
  52
  53    Success : constant C.int :=  0;
  54    Failure : constant C.int := -1;
  55
  56    function Socket_Errno return Integer;
  57    --  Returns last socket error number.
  58
  59    function Socket_Error_Message (Errno : Integer) return String;
  60    --  Returns the error message string for the error number Errno. If
  61    --  Errno is not known it returns "Unknown system error".
  62
  63    type Socket_Fd_Array is array (C.unsigned range 1 .. 64) of C.int;
  64    pragma Convention (C, Socket_Fd_Array);
  65
  66    type Fd_Set is record
  67       fd_count : C.unsigned;
  68       fd_array : Socket_Fd_Array;
  69    end record;
  70    pragma Convention (C, Fd_Set);
  71
  72    Null_Fd_Set : constant Fd_Set := (0, (others => 0));
  73
  74    type Fd_Set_Access is access all Fd_Set;
  75    pragma Convention (C, Fd_Set_Access);
  76
  77    type Timeval_Unit is new C.long;
  78    pragma Convention (C, Timeval_Unit);
  79
  80    type Timeval is record
  81       Tv_Sec  : Timeval_Unit;
  82       Tv_Usec : Timeval_Unit;
  83    end record;
  84    pragma Convention (C, Timeval);
  85
  86    type Timeval_Access is access all Timeval;
  87    pragma Convention (C, Timeval_Access);
  88
  89    Immediat : constant Timeval := (0, 0);
  90
  91    type Int_Access is access all C.int;
  92    pragma Convention (C, Int_Access);
  93    --  Access to C integers
  94
  95    type Chars_Ptr_Array is array (C.size_t range <>) of
  96      aliased C.Strings.chars_ptr;
  97
  98    package Chars_Ptr_Pointers is
  99       new C.Pointers (C.size_t, C.Strings.chars_ptr, Chars_Ptr_Array,
 100                     C.Strings.Null_Ptr);
 101    --  Arrays of C (char *)
 102
 103    type In_Addr is record
 104       S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
 105    end record;
 106    pragma Convention (C, In_Addr);
 107    --  Internet address
 108
 109    type In_Addr_Access is access all In_Addr;
 110    pragma Convention (C, In_Addr_Access);
 111    --  Access to internet address
 112
 113    Inaddr_Any : aliased constant In_Addr := (others => 0);
 114    --  Any internet address (all the interfaces)
 115
 116    type In_Addr_Access_Array is array (C.size_t range <>)
 117      of aliased In_Addr_Access;
 118    pragma Convention (C, In_Addr_Access_Array);
 119    package In_Addr_Access_Pointers is
 120      new C.Pointers (C.size_t, In_Addr_Access, In_Addr_Access_Array, null);
 121    --  Array of internet addresses
 122
 123    type Sockaddr is record
 124       Sa_Family : C.unsigned_short;
 125       Sa_Data   : C.char_array (1 .. 14);
 126    end record;
 127    pragma Convention (C, Sockaddr);
 128    --  Socket address
 129
 130    type Sockaddr_Access is access all Sockaddr;
 131    pragma Convention (C, Sockaddr_Access);
 132    --  Access to socket address
 133
 134    type Sockaddr_In is record
 135       Sin_Family : C.unsigned_short      := Constants.AF_INET;
 136       Sin_Port   : C.unsigned_short      := 0;
 137       Sin_Addr   : In_Addr               := Inaddr_Any;
 138       Sin_Zero   : C.char_array (1 .. 8) := (others => C.char'Val (0));
 139    end record;
 140    pragma Convention (C, Sockaddr_In);
 141    --  Internet socket address
 142
 143    type Sockaddr_In_Access is access all Sockaddr_In;
 144    pragma Convention (C, Sockaddr_In_Access);
 145    --  Access to internet socket address
 146
 147    type Hostent is record
 148       H_Name      : C.Strings.chars_ptr;
 149       H_Aliases   : Chars_Ptr_Pointers.Pointer;
 150       H_Addrtype  : C.short;
 151       H_Length    : C.short;
 152       H_Addr_List : In_Addr_Access_Pointers.Pointer;
 153    end record;
 154    pragma Convention (C, Hostent);
 155    --  Host entry
 156
 157    type Hostent_Access is access all Hostent;
 158    pragma Convention (C, Hostent_Access);
 159    --  Access to host entry
 160
 161    type Two_Int is array (0 .. 1) of C.int;
 162    pragma Convention (C, Two_Int);
 163    --  Used with pipe()
 164
 165    function C_Accept
 166      (S       : C.int;
 167       Addr    : System.Address;
 168       Addrlen : access C.int)
 169       return    C.int;
 170
 171    function C_Bind
 172      (S       : C.int;
 173       Name    : System.Address;
 174       Namelen : C.int)
 175       return    C.int;
 176
 177    function C_Close
 178      (Fd  : C.int)
 179      return C.int;
 180
 181    function C_Connect
 182      (S       : C.int;
 183       Name    : System.Address;
 184       Namelen : C.int)
 185       return    C.int;
 186
 187    function C_Gethostbyaddr
 188      (Addr     : System.Address;
 189       Length   : C.int;
 190       Typ      : C.int)
 191       return     Hostent_Access;
 192
 193    function C_Gethostbyname
 194      (Name : C.char_array)
 195       return Hostent_Access;
 196
 197    function C_Gethostname
 198      (Name    : System.Address;
 199       Namelen : C.int)
 200       return    C.int;
 201
 202    function C_Getpeername
 203      (S       : C.int;
 204       Name    : System.Address;
 205       Namelen : access C.int)
 206       return    C.int;
 207
 208    function C_Getsockname
 209      (S       : C.int;
 210       Name    : System.Address;
 211       Namelen : access C.int)
 212       return    C.int;
 213
 214    function C_Getsockopt
 215      (S       : C.int;
 216       Level   : C.int;
 217       Optname : C.int;
 218       Optval  : System.Address;
 219       Optlen  : access C.int)
 220       return    C.int;
 221
 222    function C_Inet_Addr
 223      (Cp   : C.Strings.chars_ptr)
 224       return C.int;
 225
 226    function C_Ioctl
 227      (S    : C.int;
 228       Req  : C.int;
 229       Arg  : Int_Access)
 230       return C.int;
 231
 232    function C_Listen
 233      (S, Backlog : C.int)
 234       return       C.int;
 235
 236    function C_Read
 237      (Fildes : C.int;
 238       Buf    : System.Address;
 239       Nbyte  : C.int)
 240       return   C.int;
 241
 242    function C_Recv
 243      (S     : C.int;
 244       Buf   : System.Address;
 245       Len   : C.int;
 246       Flags : C.int)
 247       return  C.int;
 248
 249    function C_Recvfrom
 250      (S       : C.int;
 251       Buf     : System.Address;
 252       Len     : C.int;
 253       Flags   : C.int;
 254       From    : Sockaddr_In_Access;
 255       Fromlen : access C.int)
 256       return    C.int;
 257
 258    function C_Select
 259      (Nfds      : C.int;
 260       Readfds   : Fd_Set_Access;
 261       Writefds  : Fd_Set_Access;
 262       Exceptfds : Fd_Set_Access;
 263       Timeout   : Timeval_Access)
 264       return      C.int;
 265
 266    function C_Send
 267      (S     : C.int;
 268       Buf   : System.Address;
 269       Len   : C.int;
 270       Flags : C.int)
 271       return  C.int;
 272
 273    function C_Sendto
 274      (S     : C.int;
 275       Msg   : System.Address;
 276       Len   : C.int;
 277       Flags : C.int;
 278       To    : Sockaddr_In_Access;
 279       Tolen : C.int)
 280       return  C.int;
 281
 282    function C_Setsockopt
 283      (S       : C.int;
 284       Level   : C.int;
 285       Optname : C.int;
 286       Optval  : System.Address;
 287       Optlen  : C.int)
 288       return    C.int;
 289
 290    function C_Shutdown
 291      (S    : C.int;
 292       How  : C.int)
 293       return C.int;
 294
 295    function C_Socket
 296      (Domain   : C.int;
 297       Typ      : C.int;
 298       Protocol : C.int)
 299       return     C.int;
 300
 301    function C_Strerror
 302      (Errnum : C.int)
 303       return   C.Strings.chars_ptr;
 304
 305    function C_System
 306      (Command : System.Address)
 307       return    C.int;
 308
 309    function C_Write
 310      (Fildes : C.int;
 311       Buf    : System.Address;
 312       Nbyte  : C.int)
 313       return   C.int;
 314
 315    function WSAStartup
 316      (WS_Version     : Interfaces.C.int;
 317       WSADataAddress : System.Address)
 318       return           Interfaces.C.int;
 319
 320    procedure WSACleanup;
 321
 322    procedure Clear    (Item : in out Fd_Set; Socket : in C.int);
 323    procedure Empty    (Item : in out Fd_Set);
 324    function  Is_Empty (Item : Fd_Set) return Boolean;
 325    function  Is_Set   (Item : Fd_Set; Socket : C.int) return Boolean;
 326    function  Max      (Item : Fd_Set) return C.int;
 327    procedure Set      (Item : in out Fd_Set; Socket : in C.int);
 328
 329    procedure Finalize;
 330    procedure Initialize (Process_Blocking_IO : Boolean := False);
 331
 332 private
 333
 334    pragma Import (Stdcall, C_Accept, "accept");
 335    pragma Import (Stdcall, C_Bind, "bind");
 336    pragma Import (Stdcall, C_Close, "closesocket");
 337    pragma Import (Stdcall, C_Connect, "connect");
 338    pragma Import (Stdcall, C_Gethostbyaddr, "gethostbyaddr");
 339    pragma Import (Stdcall, C_Gethostbyname, "gethostbyname");
 340    pragma Import (Stdcall, C_Gethostname, "gethostname");
 341    pragma Import (Stdcall, C_Getpeername, "getpeername");
 342    pragma Import (Stdcall, C_Getsockname, "getsockname");
 343    pragma Import (Stdcall, C_Getsockopt, "getsockopt");
 344    pragma Import (Stdcall, C_Inet_Addr, "inet_addr");
 345    pragma Import (Stdcall, C_Ioctl, "ioctlsocket");
 346    pragma Import (Stdcall, C_Listen, "listen");
 347    pragma Import (C, C_Read, "_read");
 348    pragma Import (Stdcall, C_Recv, "recv");
 349    pragma Import (Stdcall, C_Recvfrom, "recvfrom");
 350    pragma Import (Stdcall, C_Select, "select");
 351    pragma Import (Stdcall, C_Send, "send");
 352    pragma Import (Stdcall, C_Sendto, "sendto");
 353    pragma Import (Stdcall, C_Setsockopt, "setsockopt");
 354    pragma Import (Stdcall, C_Shutdown, "shutdown");
 355    pragma Import (Stdcall, C_Socket, "socket");
 356    pragma Import (C, C_Strerror, "strerror");
 357    pragma Import (C, C_System, "_system");
 358    pragma Import (C, C_Write, "_write");
 359    pragma Import (Stdcall, Socket_Errno, "WSAGetLastError");
 360    pragma Import (Stdcall, WSAStartup, "WSAStartup");
 361    pragma Import (Stdcall, WSACleanup, "WSACleanup");
 362
 363 end GNAT.Sockets.Thin;