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|
-----------------------------------------------------------------------------
-- --
-- GNATSOCKS --
-- --
-- S o c k e t s . U n i x --
-- --
-- B o d y --
-- --
-- --
-- Copyright (c) 1997-1998 Florida State University (FSU), --
-- All Rights Reserved. --
-- --
-- This file is a component of GNATSOCKS, an Ada interfaces to socket I/O --
-- services, for use with the GNAT Ada compiler. --
-- --
-- GNATSOCKS is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 2, or (at your option) any --
-- later version. FLORIST is distributed in the hope that it will be --
-- useful, but WITHOUT 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 GNARL; see --
-- file COPYING. If not, write to the Free Software Foundation, 59 --
-- Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
--
--
--
--
--
--
--
------------------------------------------------------------------------------
-- [$Revision: 1.1.1.1 $]
with Ada.Finalization,
Ada.Streams,
POSIX.C,
POSIX.Implementation,
System,
Unchecked_Conversion;
package body Sockets.Unix is
use POSIX,
POSIX.C,
POSIX.C.Sockets,
POSIX.Implementation;
function getsockname
(socket_fd : int;
name : sockaddr_var_ptr;
namelen : access int)
return int;
pragma Import (C, getsockname, getsockname_LINKNAME);
-- returns the current name for a socket
function "+" is new Unchecked_Conversion
(sockaddr_un_ptr, sockaddr_var_ptr);
function "+" is new Unchecked_Conversion
(sockaddr_un_ptr, sockaddr_ptr);
function Get_Address
(Sock : in Socket'Class)
return Unix_Socket_Address is
addr : aliased struct_sockaddr_un;
addrlen : aliased int := addr'Size / char'Size;
begin
Check (getsockname (Sock.fd, +addr'Unchecked_Access,
addrlen'Unchecked_Access));
if addrlen /= addr'Size / char'Size then raise Constraint_Error; end if;
return (Socket_Address with un_addr => addr);
end Get_Address;
type String_Ptr is access all String;
function New_Address (Path : String) return Unix_Socket_Address is
addr : struct_sockaddr_un;
function sptr_to_psptr is new Unchecked_Conversion
(String_Ptr, POSIX_String_Ptr);
begin
if Path'Length > addr.sun_path'Length - 1 then
raise Constraint_Error;
end if;
addr.sun_family := AF_UNIX;
Nulterminate (addr.sun_path, Path);
return (Socket_Address with un_addr => addr);
end New_Address;
function Get_Path (Addr : Unix_Socket_Address) return String is
begin
if Valid (Addr) then raise Constraint_Error; end if;
return Form_String (Addr.un_addr.sun_path (1)'Unchecked_Access);
end Get_Path;
----------------------------------------
function Address
(Addr : Unix_Socket_Address)
return sockaddr_ptr is
begin
return +Addr.un_addr'Unchecked_Access;
end Address;
function Length (Addr : Unix_Socket_Address) return POSIX.C.int is
begin
return Addr.un_addr'Size / char'Size;
end Length;
function Valid (Addr : Unix_Socket_Address) return Boolean is
-- only the most basic validity check
-- ... consider doing more?
begin
for I in Addr.un_addr.sun_path'Range loop
if Addr.un_addr.sun_path (I) = NUL then
return Addr.un_addr.sun_family = AF_UNIX;
end if;
end loop;
return False;
end Valid;
function Protocol_Family
(Addr : Unix_Socket_Address) return POSIX.C.int is
begin
return PF_UNIX;
end Protocol_Family;
end Sockets.Unix;
|
