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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . S O C K E T S . T H I N _ C O M M O N --
-- --
-- B o d y --
-- --
-- Copyright (C) 2008-2023, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body GNAT.Sockets.Thin_Common is
-----------------
-- Set_Address --
-----------------
procedure Set_Address
(Sin : Sockaddr_Access;
Address : Sock_Addr_Type;
Length : out C.int)
is
use type C.char;
function Network_Port return C.unsigned_short is
(Short_To_Network (C.unsigned_short (Address.Port))) with Inline;
begin
Set_Family (Sin.Sin_Family, Address.Family);
Length := C.int (Lengths (Address.Family));
case Address.Family is
when Family_Inet =>
Sin.Sin_Port := Network_Port;
Sin.Sin_Addr := To_In_Addr (Address.Addr);
when Family_Inet6 =>
Sin.Sin6_Port := Network_Port;
Sin.Sin6_Addr := To_In6_Addr (Address.Addr);
Sin.Sin6_Scope_Id := 0;
when Family_Unix =>
declare
use type C.size_t;
Name_Len : constant C.size_t :=
C.size_t (ASU.Length (Address.Name));
begin
Length := Sockaddr_Length_And_Family'Size / System.Storage_Unit
+ C.int (Name_Len);
if Name_Len > Sin.Sun_Path'Length then
raise Constraint_Error with
"Too big address length for UNIX local communication";
end if;
if Name_Len = 0 then
Sin.Sun_Path (1) := C.nul;
else
Sin.Sun_Path (1 .. Name_Len) :=
C.To_C (ASU.To_String (Address.Name), Append_Nul => False);
if Sin.Sun_Path (1) /= C.nul
and then Name_Len < Sin.Sun_Path'Length
then
Sin.Sun_Path (Name_Len + 1) := C.nul;
Length := Length + 1;
end if;
end if;
end;
when Family_Unspec =>
null;
end case;
end Set_Address;
-----------------
-- Get_Address --
-----------------
function Get_Address
(Sin : Sockaddr; Length : C.int) return Sock_Addr_Type
is
use type C.unsigned_short, C.size_t, C.char, SOSC.OS_Type;
Family : constant C.unsigned_short :=
(if SOSC.Has_Sockaddr_Len = 0 then Sin.Sin_Family.Short_Family
else C.unsigned_short (Sin.Sin_Family.Char_Family));
Result : Sock_Addr_Type
(if SOSC.AF_INET6 > 0 and then SOSC.AF_INET6 = Family then Family_Inet6
elsif SOSC.AF_UNIX > 0 and then SOSC.AF_UNIX = Family then Family_Unix
elsif SOSC.AF_INET = Family then Family_Inet
else Family_Unspec);
begin
case Result.Family is
when Family_Inet =>
Result.Port := Port_Type (Network_To_Short (Sin.Sin_Port));
To_Inet_Addr (Sin.Sin_Addr, Result.Addr);
when Family_Inet6 =>
Result.Port := Port_Type (Network_To_Short (Sin.Sin6_Port));
To_Inet_Addr (Sin.Sin6_Addr, Result.Addr);
when Family_Unix =>
if Length > Sin.Sin_Family'Size / System.Storage_Unit then
Result.Name := ASU.To_Unbounded_String
(C.To_Ada
(Sin.Sun_Path
(1 .. C.size_t (Length)
- Sin.Sin_Family'Size / System.Storage_Unit),
Trim_Nul => Sin.Sun_Path (1) /= C.nul
or else SOSC.Target_OS = SOSC.Windows));
end if;
when Family_Unspec =>
null;
end case;
return Result;
end Get_Address;
----------------
-- Set_Family --
----------------
procedure Set_Family
(Length_And_Family : out Sockaddr_Length_And_Family;
Family : Family_Type)
is
C_Family : C.int renames Families (Family);
Has_Sockaddr_Len : constant Boolean := SOSC.Has_Sockaddr_Len /= 0;
begin
if Has_Sockaddr_Len then
Length_And_Family.Length := Lengths (Family);
Length_And_Family.Char_Family := C.unsigned_char (C_Family);
else
Length_And_Family.Short_Family := C.unsigned_short (C_Family);
end if;
end Set_Family;
----------------
-- To_In_Addr --
----------------
function To_In_Addr (Addr : Inet_Addr_Type) return In_Addr is
begin
if Addr.Family = Family_Inet then
return (S_B1 => C.unsigned_char (Addr.Sin_V4 (1)),
S_B2 => C.unsigned_char (Addr.Sin_V4 (2)),
S_B3 => C.unsigned_char (Addr.Sin_V4 (3)),
S_B4 => C.unsigned_char (Addr.Sin_V4 (4)));
end if;
raise Socket_Error with "IPv6 not supported";
end To_In_Addr;
------------------
-- To_Inet_Addr --
------------------
procedure To_Inet_Addr
(Addr : In_Addr;
Result : out Inet_Addr_Type) is
begin
Result.Sin_V4 (1) := Inet_Addr_Comp_Type (Addr.S_B1);
Result.Sin_V4 (2) := Inet_Addr_Comp_Type (Addr.S_B2);
Result.Sin_V4 (3) := Inet_Addr_Comp_Type (Addr.S_B3);
Result.Sin_V4 (4) := Inet_Addr_Comp_Type (Addr.S_B4);
end To_Inet_Addr;
------------------
-- To_Inet_Addr --
------------------
procedure To_Inet_Addr
(Addr : In6_Addr;
Result : out Inet_Addr_Type)
is
Sin_V6 : Inet_Addr_V6_Type;
begin
for J in Addr'Range loop
Sin_V6 (J) := Inet_Addr_Comp_Type (Addr (J));
end loop;
Result := (Family => Family_Inet6, Sin_V6 => Sin_V6);
end To_Inet_Addr;
----------------
-- To_In_Addr --
----------------
function To_In6_Addr (Addr : Inet_Addr_Type) return In6_Addr is
Result : In6_Addr;
begin
for J in Addr.Sin_V6'Range loop
Result (J) := C.unsigned_char (Addr.Sin_V6 (J));
end loop;
return Result;
end To_In6_Addr;
----------------------
-- Short_To_Network --
----------------------
function Short_To_Network (S : C.unsigned_short) return C.unsigned_short is
use Interfaces;
use System;
begin
-- Big-endian case. No conversion needed. On these platforms, htons()
-- defaults to a null procedure.
if Default_Bit_Order = High_Order_First then
return S;
-- Little-endian case. We must swap the high and low bytes of this
-- short to make the port number network compliant.
else
return C.unsigned_short (Rotate_Left (Unsigned_16 (S), 8));
end if;
end Short_To_Network;
end GNAT.Sockets.Thin_Common;
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