434 lines
14 KiB
Ada
434 lines
14 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- G N A T . S O C K E T S . T H I N --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2001-2005, AdaCore --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
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-- Boston, MA 02110-1301, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package provides a target dependent thin interface to the sockets
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-- layer for use by the GNAT.Sockets package (g-socket.ads). This package
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-- should not be directly with'ed by an applications program.
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-- This version is for NT
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with Interfaces.C.Pointers;
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with Interfaces.C.Strings;
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with GNAT.Sockets.Constants;
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with System;
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package GNAT.Sockets.Thin is
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package C renames Interfaces.C;
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use type C.int;
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-- So that we can declare the Failure constant below
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Success : constant C.int := 0;
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Failure : constant C.int := -1;
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function Socket_Errno return Integer;
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-- Returns last socket error number
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procedure Set_Socket_Errno (Errno : Integer);
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-- Set last socket error number
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function Socket_Error_Message
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(Errno : Integer) return C.Strings.chars_ptr;
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-- Returns the error message string for the error number Errno. If
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-- Errno is not known it returns "Unknown system error".
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function Host_Errno return Integer;
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pragma Import (C, Host_Errno, "__gnat_get_h_errno");
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-- Returns last host error number
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subtype Fd_Set_Access is System.Address;
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No_Fd_Set : constant Fd_Set_Access := System.Null_Address;
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type time_t is
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range -(2 ** (8 * Constants.SIZEOF_tv_sec - 1))
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.. 2 ** (8 * Constants.SIZEOF_tv_sec - 1) - 1;
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for time_t'Size use 8 * Constants.SIZEOF_tv_sec;
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pragma Convention (C, time_t);
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type suseconds_t is
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range -(2 ** (8 * Constants.SIZEOF_tv_usec - 1))
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.. 2 ** (8 * Constants.SIZEOF_tv_usec - 1) - 1;
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for suseconds_t'Size use 8 * Constants.SIZEOF_tv_usec;
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pragma Convention (C, suseconds_t);
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type Timeval is record
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Tv_Sec : time_t;
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Tv_Usec : suseconds_t;
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end record;
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pragma Convention (C, Timeval);
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type Timeval_Access is access all Timeval;
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pragma Convention (C, Timeval_Access);
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Immediat : constant Timeval := (0, 0);
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type Int_Access is access all C.int;
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pragma Convention (C, Int_Access);
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-- Access to C integers
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type Chars_Ptr_Array is array (C.size_t range <>) of
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aliased C.Strings.chars_ptr;
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package Chars_Ptr_Pointers is
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new C.Pointers (C.size_t, C.Strings.chars_ptr, Chars_Ptr_Array,
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C.Strings.Null_Ptr);
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-- Arrays of C (char *)
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type In_Addr is record
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S_B1, S_B2, S_B3, S_B4 : C.unsigned_char;
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end record;
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pragma Convention (C, In_Addr);
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-- Internet address
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type In_Addr_Access is access all In_Addr;
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pragma Convention (C, In_Addr_Access);
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-- Access to internet address
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Inaddr_Any : aliased constant In_Addr := (others => 0);
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-- Any internet address (all the interfaces)
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type In_Addr_Access_Array is array (C.size_t range <>)
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of aliased In_Addr_Access;
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pragma Convention (C, In_Addr_Access_Array);
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package In_Addr_Access_Pointers is
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new C.Pointers (C.size_t, In_Addr_Access, In_Addr_Access_Array, null);
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-- Array of internet addresses
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type Sockaddr is record
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Sa_Family : C.unsigned_short;
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Sa_Data : C.char_array (1 .. 14);
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end record;
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pragma Convention (C, Sockaddr);
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-- Socket address
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type Sockaddr_Access is access all Sockaddr;
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pragma Convention (C, Sockaddr_Access);
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-- Access to socket address
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type Sockaddr_In is record
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Sin_Family : C.unsigned_short := Constants.AF_INET;
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Sin_Port : C.unsigned_short := 0;
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Sin_Addr : In_Addr := Inaddr_Any;
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Sin_Zero : C.char_array (1 .. 8) := (others => C.char'Val (0));
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end record;
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pragma Convention (C, Sockaddr_In);
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-- Internet socket address
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type Sockaddr_In_Access is access all Sockaddr_In;
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pragma Convention (C, Sockaddr_In_Access);
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-- Access to internet socket address
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procedure Set_Length
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(Sin : Sockaddr_In_Access;
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Len : C.int);
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pragma Inline (Set_Length);
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-- Set Sin.Sin_Length to Len.
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-- On this platform, nothing is done as there is no such field.
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procedure Set_Family
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(Sin : Sockaddr_In_Access;
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Family : C.int);
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pragma Inline (Set_Family);
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-- Set Sin.Sin_Family to Family
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procedure Set_Port
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(Sin : Sockaddr_In_Access;
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Port : C.unsigned_short);
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pragma Inline (Set_Port);
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-- Set Sin.Sin_Port to Port
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procedure Set_Address
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(Sin : Sockaddr_In_Access;
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Address : In_Addr);
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pragma Inline (Set_Address);
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-- Set Sin.Sin_Addr to Address
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type Hostent is record
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H_Name : C.Strings.chars_ptr;
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H_Aliases : Chars_Ptr_Pointers.Pointer;
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H_Addrtype : C.short;
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H_Length : C.short;
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H_Addr_List : In_Addr_Access_Pointers.Pointer;
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end record;
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pragma Convention (C, Hostent);
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-- Host entry
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type Hostent_Access is access all Hostent;
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pragma Convention (C, Hostent_Access);
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-- Access to host entry
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type Servent is record
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S_Name : C.Strings.chars_ptr;
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S_Aliases : Chars_Ptr_Pointers.Pointer;
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S_Port : C.int;
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S_Proto : C.Strings.chars_ptr;
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end record;
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pragma Convention (C, Servent);
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-- Service entry
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type Servent_Access is access all Servent;
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pragma Convention (C, Servent_Access);
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-- Access to service entry
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type Two_Int is array (0 .. 1) of C.int;
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pragma Convention (C, Two_Int);
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-- Used with pipe()
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function C_Accept
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(S : C.int;
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Addr : System.Address;
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Addrlen : access C.int) return C.int;
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function C_Bind
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(S : C.int;
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Name : System.Address;
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Namelen : C.int) return C.int;
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function C_Close
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(Fd : C.int) return C.int;
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function C_Connect
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(S : C.int;
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Name : System.Address;
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Namelen : C.int) return C.int;
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function C_Gethostbyaddr
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(Addr : System.Address;
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Length : C.int;
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Typ : C.int) return Hostent_Access;
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function C_Gethostbyname
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(Name : C.char_array) return Hostent_Access;
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function C_Gethostname
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(Name : System.Address;
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Namelen : C.int) return C.int;
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function C_Getpeername
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(S : C.int;
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Name : System.Address;
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Namelen : access C.int) return C.int;
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function C_Getservbyname
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(Name : C.char_array;
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Proto : C.char_array) return Servent_Access;
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function C_Getservbyport
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(Port : C.int;
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Proto : C.char_array) return Servent_Access;
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function C_Getsockname
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(S : C.int;
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Name : System.Address;
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Namelen : access C.int) return C.int;
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function C_Getsockopt
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(S : C.int;
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Level : C.int;
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Optname : C.int;
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Optval : System.Address;
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Optlen : access C.int) return C.int;
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function C_Inet_Addr
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(Cp : C.Strings.chars_ptr) return C.int;
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function C_Ioctl
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(S : C.int;
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Req : C.int;
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Arg : Int_Access) return C.int;
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function C_Listen
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(S : C.int;
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Backlog : C.int) return C.int;
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function C_Readv
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(Socket : C.int;
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Iov : System.Address;
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Iovcnt : C.int) return C.int;
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function C_Recv
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(S : C.int;
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Buf : System.Address;
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Len : C.int;
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Flags : C.int) return C.int;
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function C_Recvfrom
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(S : C.int;
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Buf : System.Address;
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Len : C.int;
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Flags : C.int;
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From : Sockaddr_In_Access;
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Fromlen : access C.int) return C.int;
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function C_Select
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(Nfds : C.int;
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Readfds : Fd_Set_Access;
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Writefds : Fd_Set_Access;
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Exceptfds : Fd_Set_Access;
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Timeout : Timeval_Access) return C.int;
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function C_Send
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(S : C.int;
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Buf : System.Address;
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Len : C.int;
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Flags : C.int) return C.int;
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function C_Sendto
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(S : C.int;
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Msg : System.Address;
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Len : C.int;
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Flags : C.int;
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To : Sockaddr_In_Access;
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Tolen : C.int) return C.int;
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function C_Setsockopt
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(S : C.int;
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Level : C.int;
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Optname : C.int;
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Optval : System.Address;
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Optlen : C.int) return C.int;
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function C_Shutdown
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(S : C.int;
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How : C.int) return C.int;
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function C_Socket
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(Domain : C.int;
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Typ : C.int;
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Protocol : C.int) return C.int;
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function C_Strerror
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(Errnum : C.int) return C.Strings.chars_ptr;
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function C_System
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(Command : System.Address) return C.int;
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function C_Writev
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(Socket : C.int;
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Iov : System.Address;
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Iovcnt : C.int) return C.int;
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function WSAStartup
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(WS_Version : Interfaces.C.int;
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WSADataAddress : System.Address) return Interfaces.C.int;
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procedure Free_Socket_Set
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(Set : Fd_Set_Access);
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-- Free system-dependent socket set
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procedure Get_Socket_From_Set
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(Set : Fd_Set_Access;
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Socket : Int_Access;
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Last : Int_Access);
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-- Get last socket in Socket and remove it from the socket
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-- set. The parameter Last is a maximum value of the largest
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-- socket. This hint is used to avoid scanning very large socket
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-- sets. After a call to Get_Socket_From_Set, Last is set back to
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-- the real largest socket in the socket set.
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procedure Insert_Socket_In_Set
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(Set : Fd_Set_Access;
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Socket : C.int);
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-- Insert socket in the socket set
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function Is_Socket_In_Set
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(Set : Fd_Set_Access;
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Socket : C.int) return C.int;
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-- Check whether Socket is in the socket set, return a non-zero
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-- value if it is, zero if it is not.
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procedure Last_Socket_In_Set
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(Set : Fd_Set_Access;
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Last : Int_Access);
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-- Find the largest socket in the socket set. This is needed for
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-- select(). When Last_Socket_In_Set is called, parameter Last is
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-- a maximum value of the largest socket. This hint is used to
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-- avoid scanning very large socket sets. After the call, Last is
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-- set back to the real largest socket in the socket set.
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function New_Socket_Set
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(Set : Fd_Set_Access) return Fd_Set_Access;
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-- Allocate a new socket set which is a system-dependent structure
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-- and initialize by copying Set if it is non-null, by making it
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-- empty otherwise.
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procedure Remove_Socket_From_Set
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(Set : Fd_Set_Access;
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Socket : C.int);
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-- Remove socket from the socket set
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procedure WSACleanup;
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procedure Finalize;
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procedure Initialize (Process_Blocking_IO : Boolean := False);
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private
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pragma Import (Stdcall, C_Accept, "accept");
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pragma Import (Stdcall, C_Bind, "bind");
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pragma Import (Stdcall, C_Close, "closesocket");
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pragma Import (Stdcall, C_Gethostbyaddr, "gethostbyaddr");
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pragma Import (Stdcall, C_Gethostbyname, "gethostbyname");
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pragma Import (Stdcall, C_Gethostname, "gethostname");
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pragma Import (Stdcall, C_Getpeername, "getpeername");
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pragma Import (Stdcall, C_Getservbyname, "getservbyname");
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pragma Import (Stdcall, C_Getservbyport, "getservbyport");
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pragma Import (Stdcall, C_Getsockname, "getsockname");
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pragma Import (Stdcall, C_Getsockopt, "getsockopt");
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pragma Import (Stdcall, C_Ioctl, "ioctlsocket");
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pragma Import (Stdcall, C_Listen, "listen");
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pragma Import (Stdcall, C_Recv, "recv");
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pragma Import (Stdcall, C_Recvfrom, "recvfrom");
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pragma Import (Stdcall, C_Send, "send");
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pragma Import (Stdcall, C_Sendto, "sendto");
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pragma Import (Stdcall, C_Setsockopt, "setsockopt");
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pragma Import (Stdcall, C_Shutdown, "shutdown");
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pragma Import (Stdcall, C_Socket, "socket");
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pragma Import (C, C_Strerror, "strerror");
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pragma Import (C, C_System, "_system");
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pragma Import (Stdcall, Socket_Errno, "WSAGetLastError");
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pragma Import (Stdcall, Set_Socket_Errno, "WSASetLastError");
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pragma Import (Stdcall, WSAStartup, "WSAStartup");
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pragma Import (Stdcall, WSACleanup, "WSACleanup");
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pragma Import (C, Free_Socket_Set, "__gnat_free_socket_set");
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pragma Import (C, Get_Socket_From_Set, "__gnat_get_socket_from_set");
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pragma Import (C, Is_Socket_In_Set, "__gnat_is_socket_in_set");
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pragma Import (C, Last_Socket_In_Set, "__gnat_last_socket_in_set");
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pragma Import (C, New_Socket_Set, "__gnat_new_socket_set");
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pragma Import (C, Insert_Socket_In_Set, "__gnat_insert_socket_in_set");
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pragma Import (C, Remove_Socket_From_Set, "__gnat_remove_socket_from_set");
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end GNAT.Sockets.Thin;
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