From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM,
	T_FILL_THIS_FORM_SHORT autolearn=ham autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,f0972757f30880f7
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2002-12-13 14:38:10 PST
Path: archiver1.google.com!postnews1.google.com!not-for-mail
From: benjamin_place@hotmail.com (Benjamin Place)
Newsgroups: comp.lang.ada
Subject: Re: Sockets - newbie at a brick wall
Date: 13 Dec 2002 14:38:09 -0800
Organization: http://groups.google.com/
Message-ID: <fbedb3ef.0212131438.763fede1@posting.google.com>
References: <fbedb3ef.0212111040.3063ee31@posting.google.com>
 <x7vsmx2m9y2.fsf@galadriel.frlngtn.gecm.com>
NNTP-Posting-Host: 67.36.79.140
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: posting.google.com 1039819089 18461 127.0.0.1 (13 Dec 2002 22:38:09
 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: 13 Dec 2002 22:38:09 GMT
Xref: archiver1.google.com comp.lang.ada:31805
Date: 2002-12-13T22:38:09+00:00
List-Id: <comp.lang.ada>

Simon Wright <simon.j.wright@amsjv.com> wrote in message news:<x7vsmx2m9y2.fsf@galadriel.frlngtn.gecm.com>...
> You don't show any calls to GNAT.Sockets.Initialize. We found that
> leaving out this call made no (apparent) difference on Linux, but that
> it was necessary on Windows. No experience with MacOS!

My code (version 2) works fine on OS X (or so it seems), but you're
right, it fails on Windows.

The following code (version 3) works on Windows. The default parameter
on Windows is

   procedure Initialize (Process_Blocking_IO : Boolean := False);

and this seems to work just fine.

Oddly enough, though, the call Channel := Stream (Socket, Server)
fails on Windows. The way I fixed it is to first call Connect_Socket
(Socket, Server), and then to call Channel := Stream (Socket).

The following code works on Windows, but has not been tested on Linux
or OS X.

Thanks for all the response!


--  my_client.adb version 3
with GNAT.Sockets;   use GNAT.Sockets;
with Ada.Text_IO;    use Ada.Text_IO;


procedure My_Client is
   Socket   : Socket_Type;
   Server   : Sock_Addr_Type;
   Channel  : Stream_Access;
begin

   --  Initialize Sockets library
   Initialize;
   
   --  Create a client-side socket. Raise Socket_Error on error.
   Create_Socket (Socket, Family_Inet, Socket_Datagram);

   --  Initialize sockaddr_in structure with server (remote) socket
name
   Server := (
              Addr => Addresses (Get_Host_By_Name ("passport"), 1),
              Port => 4134,
              Family => Family_Inet
      );
      
   Connect_Socket (Socket, Server);

   Channel := Stream (Socket);

   String'Output (Channel, "Hello, world!");

   Close_Socket (Socket);

end My_Client;


--  my_server.adb version 3
with GNAT.Sockets;   use GNAT.Sockets;
with Ada.Text_IO;    use Ada.Text_IO;

procedure My_Server is
   Socket     : Socket_Type;
   Address    : Sock_Addr_Type;
   Channel    : Stream_Access;
   Loop_Count : Natural := 0;
begin

   --  Initialize Sockets library
   Initialize;
   
   --  Create an endpoint for communication. Raise Socket_Error on
error.
   Create_Socket (Socket, Family_Inet, Socket_Datagram);

   --  Initialize sockaddr_in structure with server (local) socket
name
   Address.Addr := Addresses (Get_Host_By_Name ("passport"), 1);
   Address.Port := 4134;

   --  Server should bind the address to the socket
   Bind_Socket (Socket, Address);

   Channel := Stream (Socket, Address);
   
   loop
      declare
	 Message : String := String'Input (Channel);
      begin
	 exit when Message = "q";
	 Address := Get_Address (Channel);
	 Put_Line (Message & " from " & Image (Address));
      end;
   end loop;
   
   Shutdown_Socket (Socket);		--  Disconnect socket
   Close_Socket (Socket);		--  Close socket

end My_Server;