Re: [twsocket] UDP broadcast error "Permission denied"

[Arno Garrels]

Francois PIETTE wrote:
> To broadcast on 255.25.255.255, use connect() and then send().
> Connect() will set SO_BROADCAST option at the socket level.

Thanks, I have to use the listening socket in order to avoid 
Bind errors, setting SO_BROADCAST after Listen actually works fine.

Happy Holidays

-- 
Arno Garrels

 
> --
> francois.pie...@overbyte.be
> The author of the freeware multi-tier middleware MidWare
> The author of the freeware Internet Component Suite (ICS)
> http://www.overbyte.be
> 
> 
> - Original Message -
> From: "Arno Garrels" 
> To: 
> Sent: Thursday, December 23, 2010 12:20 PM
> Subject: [twsocket] UDP broadcast error "Permission denied"
> 
> 
>> Hi,
>> 
>> When I try a SendTo() address "255.255.255.255" with an UDP listening
>> TWSocket I get error WSAEACCES "Permission denied", is this normal?.
>> SendTo() "192.168.1.255" works, Firewall is turned off.
>> 
>> procedure TMyServer.UdpListen;
>> begin
>>  if FUDP = nil then
>>FUDP := TWSocket.Create(nil);
>>  FUDP.Proto := 'udp';
>>  FUDP.Addr  := '0.0.0.0'; // listening on one interface
>> doesn't change it.
>>  FUDP.Port  := '30003';
>>  FUDP.OnDataAvailable   := UdpDataAvailable;
>>  FUDP.ReuseAddr := TRUE;
>>  FUDP.Listen;
>> end;
>> 
>> procedure TMyServer.SendHelo;
>> var
>>  Dst: TSockAddrIn;
>>  DstLen : Integer;
>>  Buf: AnsiString;
>> begin
>>  FillChar(Dst, SizeOf(Dst), 0);
>>  Dst.sin_family  := AF_INET;
>>  Dst.sin_port:= WSocket_htons(StrToIntDef(FPort, 30003));
>>  Dst.sin_addr.S_addr := u_long(INADDR_BROADCAST);
>>  Buf := 'Helo';
>>  if FUDP.SendTo(Dst, DstLen, PAnsiChar(Buf), Length(Buf) + 1) = -1
>>then raise
>> Exception.Create(WSocketErrorDesc(WSocket_WSAGetLastError)); end;
>> 
>> --
>> Arno Garrels
>> --
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>> please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket
>> Visit our website at http://www.overbyte.be
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Re: [twsocket] UDP broadcast error "Permission denied"

[Francois PIETTE]

To broadcast on 255.25.255.255, use connect() and then send().
Connect() will set SO_BROADCAST option at the socket level.

--
francois.pie...@overbyte.be
The author of the freeware multi-tier middleware MidWare
The author of the freeware Internet Component Suite (ICS)
http://www.overbyte.be


- Original Message - 
From: "Arno Garrels" 

To: 
Sent: Thursday, December 23, 2010 12:20 PM
Subject: [twsocket] UDP broadcast error "Permission denied"



Hi,

When I try a SendTo() address "255.255.255.255" with an UDP listening
TWSocket I get error WSAEACCES "Permission denied", is this normal?.
SendTo() "192.168.1.255" works, Firewall is turned off.

procedure TMyServer.UdpListen;
begin
 if FUDP = nil then
   FUDP := TWSocket.Create(nil);
 FUDP.Proto := 'udp';
 FUDP.Addr  := '0.0.0.0'; // listening on one interface 
doesn't change it.

 FUDP.Port  := '30003';
 FUDP.OnDataAvailable   := UdpDataAvailable;
 FUDP.ReuseAddr := TRUE;
 FUDP.Listen;
end;

procedure TMyServer.SendHelo;
var
 Dst: TSockAddrIn;
 DstLen : Integer;
 Buf: AnsiString;
begin
 FillChar(Dst, SizeOf(Dst), 0);
 Dst.sin_family  := AF_INET;
 Dst.sin_port:= WSocket_htons(StrToIntDef(FPort, 30003));
 Dst.sin_addr.S_addr := u_long(INADDR_BROADCAST);
 Buf := 'Helo';
 if FUDP.SendTo(Dst, DstLen, PAnsiChar(Buf), Length(Buf) + 1) = -1 then
   raise Exception.Create(WSocketErrorDesc(WSocket_WSAGetLastError));
end;

--
Arno Garrels
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