/usr/share/ada/adainclude/anet/anet-sockets.adb is in libanet1-dev 0.3.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- Copyright (C) 2011-2013 secunet Security Networks AG
-- Copyright (C) 2011-2016 Reto Buerki <reet@codelabs.ch>
-- Copyright (C) 2011-2016 Adrian-Ken Rueegsegger <ken@codelabs.ch>
--
-- This program is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at your
-- option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
--
-- This program 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.
--
-- 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.
--
with GNAT.OS_Lib;
with Anet.Errno;
with Anet.OS_Constants;
with Anet.Sockets.Thin;
package body Anet.Sockets is
package C renames Interfaces.C;
-------------------------------------------------------------------------
function Check_Accept (Result : Interfaces.C.int) return Accept_Result_Type
is
begin
if Result = C_Failure then
if GNAT.OS_Lib.Errno = Constants.Sys.EINTR then
-- Aborted, most probably via an ATC in the receiver task.
return Accept_Op_Aborted;
end if;
-- Some other error occurred.
return Accept_Op_Error;
end if;
return Accept_Op_Ok;
end Check_Accept;
-------------------------------------------------------------------------
procedure Check_Complete_Send
(Item : Ada.Streams.Stream_Element_Array;
Result : Interfaces.C.long;
Error_Msg : String)
is
use Ada.Streams;
Sent_Bytes : constant Stream_Element_Offset
:= Item'First + (Stream_Element_Offset (Result) - Item'First);
begin
if Sent_Bytes /= Item'Length then
raise Socket_Error with Error_Msg & ", only" & Sent_Bytes'Img & " of"
& Item'Length'Img & " bytes sent";
end if;
end Check_Complete_Send;
-------------------------------------------------------------------------
function Check_Receive (Result : Interfaces.C.long) return Recv_Result_Type
is
begin
if Result = 0 then
-- The peer performed an orderly shutdown.
return Recv_Op_Orderly_Shutdown;
end if;
if Result = C_Failure then
if GNAT.OS_Lib.Errno = Constants.Sys.EINTR then
-- Aborted, most probably via an ATC in the receiver task.
return Recv_Op_Aborted;
end if;
-- Some other error occurred.
return Recv_Op_Error;
end if;
return Recv_Op_Ok;
end Check_Receive;
-------------------------------------------------------------------------
procedure Close (Socket : in out Socket_Type)
is
Res : C.int;
begin
if Socket.Sock_FD /= -1 then
Res := Thin.C_Close (Socket.Sock_FD);
Errno.Check_Or_Raise
(Result => Res,
Message => "Unable to close socket");
Socket.Sock_FD := -1;
Socket.Protocol := 0;
end if;
end Close;
-------------------------------------------------------------------------
procedure Finalize (Socket : in out Socket_Type)
is
begin
Socket_Type'Class (Socket).Close;
end Finalize;
-------------------------------------------------------------------------
procedure Init
(Socket : in out Socket_Type;
Family : Socket_Families.Family_Type;
Mode : Mode_Type;
Protocol : Double_Byte := 0)
is
Res : C.int;
begin
Res := Thin.C_Socket
(Domain => Socket_Families.Families (Family),
Typ => Modes (Mode),
Protocol => C.int (Protocol));
Errno.Check_Or_Raise
(Result => Res,
Message => "Unable to create socket (" & Family'Img & "/" & Mode'Img &
", protocol" & Protocol'Img & ")");
Socket.Sock_FD := Res;
Socket.Protocol := Protocol;
end Init;
-------------------------------------------------------------------------
procedure Listen
(Socket : Socket_Type;
Backlog : Positive := 1)
is
begin
Errno.Check_Or_Raise
(Result => Thin.C_Listen
(Socket => Socket.Sock_FD,
Backlog => C.int (Backlog)),
Message => "Unable to listen on socket with backlog" & Backlog'Img);
end Listen;
-------------------------------------------------------------------------
procedure Receive
(Socket : Socket_Type;
Item : out Ada.Streams.Stream_Element_Array;
Last : out Ada.Streams.Stream_Element_Offset)
is
use type Ada.Streams.Stream_Element_Offset;
Res : C.long;
begin
Last := 0;
Res := Thin.C_Recv (S => Socket.Sock_FD,
Msg => Item'Address,
Len => Item'Length,
Flags => 0);
case Check_Receive (Result => Res)
is
when Recv_Op_Orderly_Shutdown | Recv_Op_Aborted => return;
when Recv_Op_Error =>
raise Socket_Error with "Error receiving data from socket: "
& Errno.Get_Errno_String;
when Recv_Op_Ok =>
Last := Item'First + Ada.Streams.Stream_Element_Offset (Res - 1);
end case;
end Receive;
-------------------------------------------------------------------------
procedure Send
(Socket : Socket_Type;
Item : Ada.Streams.Stream_Element_Array)
is
Res : C.long;
begin
Res := Thin.C_Send
(S => Socket.Sock_FD,
Buf => Item'Address,
Len => Item'Length,
Flags => 0);
Errno.Check_Or_Raise
(Result => C.int (Res),
Message => "Unable to send data on socket");
Check_Complete_Send
(Item => Item,
Result => Res,
Error_Msg => "Incomplete send operation on socket");
end Send;
-------------------------------------------------------------------------
procedure Set_Nonblocking_Mode
(Socket : Socket_Type;
Enable : Boolean := True)
is
use Interfaces;
Flags : Unsigned_32 := Unsigned_32
(Thin.C_Fcntl
(Fd => Socket.Sock_FD,
Cmd => Constants.Sys.F_GETFL,
Arg => 0));
begin
if Enable then
Flags := Flags or Unsigned_32 (OS_Constants.O_NONBLOCK);
else
Flags := Flags and not Unsigned_32 (OS_Constants.O_NONBLOCK);
end if;
Errno.Check_Or_Raise
(Result => Thin.C_Fcntl
(Fd => Socket.Sock_FD,
Cmd => Constants.Sys.F_SETFL,
Arg => C.int (Flags)),
Message => "Unable to set non-blocking mode to " & Enable'Img);
end Set_Nonblocking_Mode;
-------------------------------------------------------------------------
procedure Set_Socket_Option
(Socket : Socket_Type;
Option : Option_Name_Bool;
Value : Boolean)
is
Val : C.int := C.int (Boolean'Pos (Value));
begin
Errno.Check_Or_Raise
(Result => Thin.C_Setsockopt
(S => Socket.Sock_FD,
Level => Levels (Socket_Level),
Optname => Options_Bool (Option),
Optval => Val'Address,
Optlen => Val'Size / 8),
Message => "Unable set boolean socket option " & Option'Img & " to " &
Value'Img);
end Set_Socket_Option;
-------------------------------------------------------------------------
procedure Set_Socket_Option
(Socket : Socket_Type;
Option : Option_Name_Str;
Value : String)
is
Val : constant C.char_array := C.To_C (Value);
begin
Errno.Check_Or_Raise
(Result => Thin.C_Setsockopt
(S => Socket.Sock_FD,
Level => Levels (Socket_Level),
Optname => Options_Str (Option),
Optval => Val'Address,
Optlen => Val'Size / 8),
Message => "Unable set string socket option " & Option'Img & " to '" &
Value & "'");
end Set_Socket_Option;
end Anet.Sockets;
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