265 lines
9.2 KiB
Ada
265 lines
9.2 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) 2001-2009, 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 is the default version
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with Interfaces.C.Strings;
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with GNAT.OS_Lib;
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with GNAT.Sockets.Thin_Common;
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with System;
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package GNAT.Sockets.Thin is
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-- This package is intended for hosts implementing BSD sockets with a
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-- standard interface. It will be used as a default for all the platforms
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-- that do not have a specific version of this file.
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use Thin_Common;
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package C renames Interfaces.C;
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use type C.size_t;
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type ssize_t is range -(2 ** (C.size_t'Size - 1))
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.. +(2 ** (C.size_t'Size - 1) - 1);
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-- Signed type of the same size as size_t
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function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
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-- Returns last socket error number
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function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
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-- Returns the error message string for the error number Errno. If Errno is
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-- not known, 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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package Host_Error_Messages is
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function Host_Error_Message
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(H_Errno : Integer) return C.Strings.chars_ptr;
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-- Returns the error message string for the host error number H_Errno.
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-- If H_Errno is not known, returns "Unknown system error".
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end Host_Error_Messages;
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--------------------------------
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-- Standard library functions --
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--------------------------------
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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 : not null 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_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 : not null access C.int) return C.int;
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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 : not null 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 : not null access C.int) return C.int;
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function Socket_Ioctl
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(S : C.int;
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Req : C.int;
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Arg : access C.int) 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_Recv
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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) return C.int;
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function C_Recvfrom
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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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From : System.Address;
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Fromlen : not null access C.int) return C.int;
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function C_Recvmsg
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(S : C.int;
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Msg : System.Address;
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Flags : C.int) return ssize_t;
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function C_Select
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(Nfds : C.int;
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Readfds : access Fd_Set;
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Writefds : access Fd_Set;
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Exceptfds : access Fd_Set;
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Timeout : Timeval_Access) return C.int;
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function C_Sendmsg
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(S : C.int;
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Msg : System.Address;
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Flags : C.int) return ssize_t;
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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 : System.Address;
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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_System
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(Command : System.Address) return C.int;
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-------------------------------------------------------
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-- Signalling file descriptors for selector abortion --
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-------------------------------------------------------
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package Signalling_Fds is
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function Create (Fds : not null access Fd_Pair) return C.int;
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pragma Convention (C, Create);
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-- Create a pair of connected descriptors suitable for use with C_Select
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-- (used for signalling in Selector objects).
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function Read (Rsig : C.int) return C.int;
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pragma Convention (C, Read);
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-- Read one byte of data from rsig, the read end of a pair of signalling
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-- fds created by Create_Signalling_Fds.
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function Write (Wsig : C.int) return C.int;
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pragma Convention (C, Write);
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-- Write one byte of data to wsig, the write end of a pair of signalling
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-- fds created by Create_Signalling_Fds.
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procedure Close (Sig : C.int);
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pragma Convention (C, Close);
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-- Close one end of a pair of signalling fds (ignoring any error)
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end Signalling_Fds;
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-------------------------------------------
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-- Nonreentrant network databases access --
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-------------------------------------------
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-- The following are used only on systems that have nonreentrant
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-- getXXXbyYYY functions, and do NOT have corresponding getXXXbyYYY_
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-- functions. Currently, LynxOS is the only such system.
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function Nonreentrant_Gethostbyname
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(Name : C.char_array) return Hostent_Access;
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function Nonreentrant_Gethostbyaddr
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(Addr : System.Address;
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Addr_Len : C.int;
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Addr_Type : C.int) return Hostent_Access;
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function Nonreentrant_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 Nonreentrant_Getservbyport
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(Port : C.int;
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Proto : C.char_array) return Servent_Access;
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procedure Initialize;
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procedure Finalize;
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private
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pragma Import (C, C_Bind, "bind");
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pragma Import (C, C_Close, "close");
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pragma Import (C, C_Gethostname, "gethostname");
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pragma Import (C, C_Getpeername, "getpeername");
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pragma Import (C, C_Getsockname, "getsockname");
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pragma Import (C, C_Getsockopt, "getsockopt");
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pragma Import (C, C_Listen, "listen");
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pragma Import (C, C_Select, "select");
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pragma Import (C, C_Setsockopt, "setsockopt");
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pragma Import (C, C_Shutdown, "shutdown");
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pragma Import (C, C_System, "system");
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pragma Import (C, Nonreentrant_Gethostbyname, "gethostbyname");
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pragma Import (C, Nonreentrant_Gethostbyaddr, "gethostbyaddr");
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pragma Import (C, Nonreentrant_Getservbyname, "getservbyname");
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pragma Import (C, Nonreentrant_Getservbyport, "getservbyport");
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end GNAT.Sockets.Thin;
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