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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . S O C K E T S . T H I N --
-- --
-- S p e c --
-- --
-- Copyright (C) 2001-2009, AdaCore --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package provides a target dependent thin interface to the sockets
-- layer for use by the GNAT.Sockets package (g-socket.ads). This package
-- should not be directly with'ed by an applications program.
-- This is the default version
with Interfaces.C.Strings;
with GNAT.OS_Lib;
with GNAT.Sockets.Thin_Common;
with System;
with System.CRTL;
package GNAT.Sockets.Thin is
-- This package is intended for hosts implementing BSD sockets with a
-- standard interface. It will be used as a default for all the platforms
-- that do not have a specific version of this file.
use Thin_Common;
package C renames Interfaces.C;
use type System.CRTL.ssize_t;
function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
-- Returns last socket error number
function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
-- Returns the error message string for the error number Errno. If Errno is
-- not known, returns "Unknown system error".
function Host_Errno return Integer;
pragma Import (C, Host_Errno, "__gnat_get_h_errno");
-- Returns last host error number
package Host_Error_Messages is
function Host_Error_Message
(H_Errno : Integer) return C.Strings.chars_ptr;
-- Returns the error message string for the host error number H_Errno.
-- If H_Errno is not known, returns "Unknown system error".
end Host_Error_Messages;
--------------------------------
-- Standard library functions --
--------------------------------
function C_Accept
(S : C.int;
Addr : System.Address;
Addrlen : not null access C.int) return C.int;
function C_Bind
(S : C.int;
Name : System.Address;
Namelen : C.int) return C.int;
function C_Close
(Fd : C.int) return C.int;
function C_Connect
(S : C.int;
Name : System.Address;
Namelen : C.int) return C.int;
function C_Gethostname
(Name : System.Address;
Namelen : C.int) return C.int;
function C_Getpeername
(S : C.int;
Name : System.Address;
Namelen : not null access C.int) return C.int;
function C_Getsockname
(S : C.int;
Name : System.Address;
Namelen : not null access C.int) return C.int;
function C_Getsockopt
(S : C.int;
Level : C.int;
Optname : C.int;
Optval : System.Address;
Optlen : not null access C.int) return C.int;
function Socket_Ioctl
(S : C.int;
Req : C.int;
Arg : access C.int) return C.int;
function C_Listen
(S : C.int;
Backlog : C.int) return C.int;
function C_Recv
(S : C.int;
Msg : System.Address;
Len : C.int;
Flags : C.int) return C.int;
function C_Recvfrom
(S : C.int;
Msg : System.Address;
Len : C.int;
Flags : C.int;
From : System.Address;
Fromlen : not null access C.int) return C.int;
function C_Recvmsg
(S : C.int;
Msg : System.Address;
Flags : C.int) return System.CRTL.ssize_t;
function C_Select
(Nfds : C.int;
Readfds : access Fd_Set;
Writefds : access Fd_Set;
Exceptfds : access Fd_Set;
Timeout : Timeval_Access) return C.int;
function C_Sendmsg
(S : C.int;
Msg : System.Address;
Flags : C.int) return System.CRTL.ssize_t;
function C_Sendto
(S : C.int;
Msg : System.Address;
Len : C.int;
Flags : C.int;
To : System.Address;
Tolen : C.int) return C.int;
function C_Setsockopt
(S : C.int;
Level : C.int;
Optname : C.int;
Optval : System.Address;
Optlen : C.int) return C.int;
function C_Shutdown
(S : C.int;
How : C.int) return C.int;
function C_Socket
(Domain : C.int;
Typ : C.int;
Protocol : C.int) return C.int;
function C_System
(Command : System.Address) return C.int;
-------------------------------------------------------
-- Signalling file descriptors for selector abortion --
-------------------------------------------------------
package Signalling_Fds is
function Create (Fds : not null access Fd_Pair) return C.int;
pragma Convention (C, Create);
-- Create a pair of connected descriptors suitable for use with C_Select
-- (used for signalling in Selector objects).
function Read (Rsig : C.int) return C.int;
pragma Convention (C, Read);
-- Read one byte of data from rsig, the read end of a pair of signalling
-- fds created by Create_Signalling_Fds.
function Write (Wsig : C.int) return C.int;
pragma Convention (C, Write);
-- Write one byte of data to wsig, the write end of a pair of signalling
-- fds created by Create_Signalling_Fds.
procedure Close (Sig : C.int);
pragma Convention (C, Close);
-- Close one end of a pair of signalling fds (ignoring any error)
end Signalling_Fds;
-------------------------------------------
-- Nonreentrant network databases access --
-------------------------------------------
-- The following are used only on systems that have nonreentrant
-- getXXXbyYYY functions, and do NOT have corresponding getXXXbyYYY_
-- functions. Currently, LynxOS is the only such system.
function Nonreentrant_Gethostbyname
(Name : C.char_array) return Hostent_Access;
function Nonreentrant_Gethostbyaddr
(Addr : System.Address;
Addr_Len : C.int;
Addr_Type : C.int) return Hostent_Access;
function Nonreentrant_Getservbyname
(Name : C.char_array;
Proto : C.char_array) return Servent_Access;
function Nonreentrant_Getservbyport
(Port : C.int;
Proto : C.char_array) return Servent_Access;
procedure Initialize;
procedure Finalize;
private
pragma Import (C, C_Bind, "bind");
pragma Import (C, C_Close, "close");
pragma Import (C, C_Gethostname, "gethostname");
pragma Import (C, C_Getpeername, "getpeername");
pragma Import (C, C_Getsockname, "getsockname");
pragma Import (C, C_Getsockopt, "getsockopt");
pragma Import (C, C_Listen, "listen");
pragma Import (C, C_Select, "select");
pragma Import (C, C_Setsockopt, "setsockopt");
pragma Import (C, C_Shutdown, "shutdown");
pragma Import (C, C_System, "system");
pragma Import (C, Nonreentrant_Gethostbyname, "gethostbyname");
pragma Import (C, Nonreentrant_Gethostbyaddr, "gethostbyaddr");
pragma Import (C, Nonreentrant_Getservbyname, "getservbyname");
pragma Import (C, Nonreentrant_Getservbyport, "getservbyport");
end GNAT.Sockets.Thin;
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