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--
--  Copyright (C) 2012      secunet Security Networks AG
--  Copyright (C) 2012-2014 Reto Buerki <reet@codelabs.ch>
--  Copyright (C) 2012-2014 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 Anet.Types;

package Anet.Sockets.Inet is

   type Inet_Socket_Type is abstract new Socket_Type with private;
   --  Internet socket.

   procedure Bind
     (Socket : in out Inet_Socket_Type;
      Iface  :        Types.Iface_Name_Type);
   --  Bind given Inet socket to the specified interface.

   ----------
   -- IPv4 --
   ----------

   type IPv4_Socket_Type is abstract new Inet_Socket_Type with private;
   --  IPv4 socket.

   procedure Bind
     (Socket  : in out IPv4_Socket_Type;
      Address :        IPv4_Addr_Type := Any_Addr;
      Port    :        Port_Type);
   --  Bind given IPv4 socket to the specified IPv4 address and port.

   procedure Send
     (Socket   : IPv4_Socket_Type;
      Item     : Ada.Streams.Stream_Element_Array;
      Dst_Addr : IPv4_Addr_Type;
      Dst_Port : Port_Type);
   --  Send given data to the specified destination via the given socket.

   type UDPv4_Socket_Type is new IPv4_Socket_Type
     and Dgram_Socket_Type with private;
   --  IPv4/UDP socket.

   procedure Init (Socket : in out UDPv4_Socket_Type);
   --  Initialize given IPv4/UDP socket.

   type UDPv4_Sockaddr_Type is record
      Addr : IPv4_Addr_Type;
      Port : Port_Type;
   end record;
   --  UDPv4 socket address.

   procedure Receive
     (Socket :     UDPv4_Socket_Type;
      Src    : out UDPv4_Sockaddr_Type;
      Item   : out Ada.Streams.Stream_Element_Array;
      Last   : out Ada.Streams.Stream_Element_Offset);
   --  Receive data from given UDPv4 socket. This procedure blocks until data
   --  has been received. Last is the index value such that Item (Last) is the
   --  last character assigned. An exception is raised if a socket error
   --  occurs. The source argument is set to the sender's address and port from
   --  which the data was received.

   procedure Join_Multicast_Group
     (Socket : UDPv4_Socket_Type;
      Group  : IPv4_Addr_Type;
      Iface  : Types.Iface_Name_Type := "");
   --  Join the given multicast group on the interface specified by name. If no
   --  interface name is provided, the kernel selects the interface.

   procedure Multicast_Set_Sending_Interface
     (Socket     : UDPv4_Socket_Type;
      Iface_Addr : IPv4_Addr_Type);
   --  Use interface specified by address for Multicast sending on this socket.

   type TCPv4_Socket_Type is new IPv4_Socket_Type
     and Stream_Socket_Type with private;
   --  IPv4/TCP socket.

   overriding
   procedure Accept_Connection
     (Socket     :     TCPv4_Socket_Type;
      New_Socket : out TCPv4_Socket_Type);
   --  Accept first connection request from listening socket and return new
   --  connected socket.

   procedure Init (Socket : in out TCPv4_Socket_Type);
   --  Initialize given IPv4/TCP socket.

   procedure Connect
     (Socket  : in out TCPv4_Socket_Type;
      Address :        IPv4_Addr_Type;
      Port    :        Port_Type);
   --  Connect TCPv4 socket to specified IPv4 address and port.

   ----------
   -- IPv6 --
   ----------

   type IPv6_Socket_Type is abstract new Inet_Socket_Type with private;
   --  IPv6 socket.

   procedure Bind
     (Socket  : in out IPv6_Socket_Type;
      Address :        IPv6_Addr_Type        := Any_Addr_V6;
      Port    :        Port_Type);
   --  Bind given IPv6 socket to the specified IPv6 address and port.

   procedure Send
     (Socket   : IPv6_Socket_Type;
      Item     : Ada.Streams.Stream_Element_Array;
      Dst_Addr : IPv6_Addr_Type;
      Dst_Port : Port_Type);
   --  Send given data to the specified destination via the given socket.

   type UDPv6_Socket_Type is new IPv6_Socket_Type
     and Dgram_Socket_Type with private;
   --  IPv6/UDP socket.

   procedure Init (Socket : in out UDPv6_Socket_Type);
   --  Initialize given IPv6/UDP socket.

   type UDPv6_Sockaddr_Type is record
      Addr : IPv6_Addr_Type;
      Port : Port_Type;
   end record;
   --  UDPv6 socket address.

   procedure Receive
     (Socket :     UDPv6_Socket_Type;
      Src    : out UDPv6_Sockaddr_Type;
      Item   : out Ada.Streams.Stream_Element_Array;
      Last   : out Ada.Streams.Stream_Element_Offset);
   --  Receive data from given UDPv6 socket. This procedure blocks until data
   --  has been received. Last is the index value such that Item (Last) is the
   --  last character assigned. An exception is raised if a socket error
   --  occurs. The source argument is set to the sender's address and port from
   --  which the data was received.

   procedure Join_Multicast_Group
     (Socket : UDPv6_Socket_Type;
      Group  : IPv6_Addr_Type;
      Iface  : Types.Iface_Name_Type := "");
   --  Join the given multicast group on the interface specified by name. If no
   --  interface name is provided, the kernel selects the interface.

   procedure Multicast_Set_Sending_Interface
     (Socket : UDPv6_Socket_Type;
      Iface  : Types.Iface_Name_Type);
   --  Use interface specified by name for Multicast sending on this socket.

   type TCPv6_Socket_Type is new IPv6_Socket_Type
     and Stream_Socket_Type with private;
   --  IPv6/TCP socket.

   overriding
   procedure Accept_Connection
     (Socket     :     TCPv6_Socket_Type;
      New_Socket : out TCPv6_Socket_Type);
   --  Accept first connection request from listening socket and return new
   --  connected socket.

   procedure Init (Socket : in out TCPv6_Socket_Type);
   --  Initialize given IPv6/TCP socket.

   procedure Connect
     (Socket  : in out TCPv6_Socket_Type;
      Address :        IPv6_Addr_Type;
      Port    :        Port_Type);
   --  Connect TCPv6 socket to specified IPv6 address and port.

private

   type Inet_Socket_Type is abstract new Socket_Type with null record;

   type IPv4_Socket_Type is abstract new Inet_Socket_Type with null record;

   type IPv6_Socket_Type is abstract new Inet_Socket_Type with null record;

   type UDPv4_Socket_Type is new IPv4_Socket_Type
     and Dgram_Socket_Type with null record;

   type TCPv4_Socket_Type is new IPv4_Socket_Type
     and Stream_Socket_Type with null record;

   type UDPv6_Socket_Type is new IPv6_Socket_Type
     and Dgram_Socket_Type with null record;

   type TCPv6_Socket_Type is new IPv6_Socket_Type
     and Stream_Socket_Type with null record;

end Anet.Sockets.Inet;