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