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------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2008-2012, AdaCore --
-- --
-- This 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 3, or (at your option) any --
-- later version. This software 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 this software; see file COPYING3. If not, go --
-- to http://www.gnu.org/licenses for a complete copy of the license. --
------------------------------------------------------------------------------
with Ada.Text_IO;
with AWS.Net.Std;
with AWS.OS_Lib;
with Interfaces.C.Strings;
with System;
procedure AddrInfo is
use Ada.Text_IO;
use AWS;
procedure Get_Addr_Info (Host : String; Flags : Interfaces.C.int) is
use Interfaces;
package CS renames Interfaces.C.Strings;
use type C.int;
use type C.unsigned;
use type OS_Lib.Addr_Info_Access;
function getnameinfo
(sa : System.Address;
salen : OS_Lib.socklen_t;
host : CS.chars_ptr;
hostlen : C.size_t;
serv : CS.chars_ptr;
servlen : C.size_t;
flags : C.int) return C.int;
pragma Import (StdCall, getnameinfo, "getnameinfo");
C_Node : aliased C.char_array := C.To_C (Host);
P_Node : CS.chars_ptr;
C_Serv : aliased C.char_array := C.To_C ("0");
Res : C.int;
Result : aliased OS_Lib.Addr_Info_Access;
Hints : constant OS_Lib.Addr_Info :=
(ai_family => OS_Lib.AF_UNSPEC,
ai_socktype => OS_Lib.SOCK_STREAM,
ai_protocol => OS_Lib.IPPROTO_IP,
ai_flags => C.int (Flags),
ai_addrlen => 0,
ai_canonname => CS.Null_Ptr,
ai_addr => System.Null_Address,
ai_next => null);
procedure Check_Res is
begin
if Res = OS_Lib.EAI_SYSTEM then
raise Program_Error with OS_Lib.Socket_Errno'Img;
elsif Res /= 0 then
raise Program_Error with CS.Value (OS_Lib.GAI_StrError (Res));
end if;
end Check_Res;
Addr : aliased C.char_array := (0 .. 128 => C.nul);
begin
if Host = "" then
P_Node := CS.Null_Ptr;
else
P_Node := CS.To_Chars_Ptr (C_Node'Unchecked_Access);
end if;
Res := OS_Lib.GetAddrInfo
(node => P_Node,
service => CS.To_Chars_Ptr (C_Serv'Unchecked_Access),
hints => Hints,
res => Result'Access);
Check_Res;
Put (''' & Host & ''');
while Result /= null loop
Res := getnameinfo
(sa => Result.ai_addr,
salen => Result.ai_addrlen,
host => CS.To_Chars_Ptr (Addr'Unchecked_Access),
hostlen => Addr'Length,
serv => CS.Null_Ptr,
servlen => 0,
flags => OS_Lib.NI_NUMERICHOST);
Check_Res;
Put (' ' & C.To_Ada (Addr));
Result := Result.ai_next;
end loop;
New_Line;
end Get_Addr_Info;
begin
Put (AWS.Net.Std.Host_Name);
if Net.IPv6_Available then
Put_Line (" IPv6");
else
New_Line;
end if;
Get_Addr_Info ("", OS_Lib.AI_PASSIVE);
Get_Addr_Info ("localhost", 0);
end AddrInfo;
|
