mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-08 01:08:07 +02:00
* added setsocketoptions + pulled it through source beautifier
This commit is contained in:
marco
parent
26e15a2e1d
commit
ab086a8e20
@ -9,14 +9,14 @@ Program Socket_Comms_Test;
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to the port number.
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This program runs as-is, just telnet localhost 5000 to connect to it.
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No warranty at all, I will not be responsible if this sets fire to your dog!
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This is exactly as I use it, I have just put the references to my db unit
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in curly brackets. It just echoes back what you type on a line by line basis
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Run it in X or on a seperate virtual console to the one you are telneting from
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as it prints a LOT of info to the console about what it is doing and such.
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I'm not a pretty coder at all, so please, no complaints about the lack of
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comments or coding style, unless they are very contructive ;p)
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type 'quit', minus the quotes and in lower case on the console to exit the
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program. The only problem I can see with this, is if you exit it, it does
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not shut down the connections to the telnet sessions cleanly, and therefore
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@ -26,256 +26,273 @@ Program Socket_Comms_Test;
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If you know how to fix this, please let me know and I'll update the code.
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If you exit all your telnet sessions before shutting the server down, it
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works fine.
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Hope some of you find this usefull. I wrote it, purely because there is a
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big lack of examples of linux port use in FPC. And I know NO C, therefore
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the examples on the net meant nothing to me.
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All I ask is :-
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If you like it, use it or want to change it, please drop me an E-mail.
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Regards Brad Campbell
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bcampbel@omen.net.au
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***************************************************************************}
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{$mode ObjFPC}
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Uses Linux, Sockets, Sysutils{, dbu};
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Const
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NumberofConnections = 5;
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Type ConnectionType = Record
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IP : Cardinal;
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Port : Word;
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Handle : Integer;
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Connected : Boolean;
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IdleTimer : Integer;
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End;
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NumberofConnections = 5;
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Type ConnectionType = Record
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IP : Cardinal;
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Port : Word;
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Handle : Integer;
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Connected : Boolean;
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IdleTimer : Integer;
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End;
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Var
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Connection : Array[1..NumberofConnections] of ConnectionType;
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FDS : FDSet;
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S : LongInt;
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PortNumber : Word;
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GreatestHandle : Integer;
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Quit : Boolean;
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Command : String;
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Connection : Array[1..NumberofConnections] Of ConnectionType;
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FDS : FDSet;
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S : LongInt;
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PortNumber : Word;
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GreatestHandle : Integer;
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Quit : Boolean;
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Command : String;
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Procedure ZeroConnection;
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Var Loop : Integer;
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Begin
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For Loop := 1 to NumberOfConnections do
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Connection[Loop].Connected := False;
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For Loop := 1 To NumberOfConnections Do
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Connection[Loop].Connected := False;
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End;
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Function FreeConnections : Integer;
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Var Loop : Integer;
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Result : Integer;
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Var Loop : Integer;
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Begin
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Result := 0;
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For Loop := 1 to NumberOfConnections do
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If Not Connection[Loop].Connected then Result := Result + 1;
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FreeConnections := Result;
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Result := 0;
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For Loop := 1 To NumberOfConnections Do
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If Not Connection[Loop].Connected Then Inc(Result);
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FreeConnections := Result;
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End;
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Function GetFreeConnection : Integer;
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Var Loop : Integer;
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Result : Integer;
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Found : Boolean;
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Found : Boolean;
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Begin
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Result := 0;
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Loop := 1;
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Found := False;
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While (Loop < NumberOfConnections + 1) and (Not Found) do
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Begin
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If Not Connection[Loop].Connected then
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Begin
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Found := True;
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Result := Loop;
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End;
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Loop := Loop + 1;
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GetFreeConnection := Result;
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End;
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Result := 0;
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Loop := 1;
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Found := False;
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While (Loop < NumberOfConnections + 1) and (Not Found) Do
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Begin
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If Not Connection[Loop].Connected Then
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Begin
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Found := True;
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Result := Loop;
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End;
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Inc(Loop);
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GetFreeConnection := Result;
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End;
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End;
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Procedure PError(S : String);
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Begin
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Writeln(S,SocketError);
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Halt(100);
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Writeln(S,SocketError);
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Halt(100);
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End;
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Procedure PDebug(S : String);
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Begin
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Writeln(S);
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Writeln(S);
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End;
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Procedure PDebugNOLF(S: String);
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Begin
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Write(S);
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Write(S);
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End;
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Function SockAddrtoString(InAddr : LongWord) : String;
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Var
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P1,P2,P3,P4 : Byte;
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S1,S2,S3,S4 : String;
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P1,P2,P3,P4 : Byte;
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S1,S2,S3,S4 : String;
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Begin
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P1 := (InAddr And $ff000000) Shr 24;
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P2 := (InAddr And $ff0000) Shr 16;
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P3 := (InAddr And $ff00) Shr 8;
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P4 := InAddr And $FF;
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Str(P1,S1);
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Str(P2,S2);
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Str(P3,S3);
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Str(P4,S4);
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SockAddrtoString := S4+'.'+S3+'.'+S2+'.'+S1;
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P1 := (InAddr And $ff000000) Shr 24;
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P2 := (InAddr And $ff0000) Shr 16;
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P3 := (InAddr And $ff00) Shr 8;
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P4 := InAddr And $FF;
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Str(P1,S1);
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Str(P2,S2);
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Str(P3,S3);
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Str(P4,S4);
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SockAddrtoString := S4+'.'+S3+'.'+S2+'.'+S1;
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End;
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Procedure WelcomeHandle(Handle, ConnNum : Integer);
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Var Buffer : String;
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Sent : Integer;
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Var Buffer : String;
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Sent : Integer;
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Begin
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Buffer := 'Welcome to Brads Server 1.0'+#10+#13+'You Are Connection '+
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InttoStr(ConnNum)+' Of '+InttoStr(NumberofConnections)+
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', With '+InttoStr(FreeConnections)+' Connections Free'#13+#10;
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Sent := Send(Handle,Buffer[1],Length(Buffer),0);
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If Sent <> Length(Buffer) then PDebug('Wanted to Send : '
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+InttoStr(Length(Buffer))+' Sent Only : '+InttoStr(Sent)+
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' to Connection : '+InttoStr(ConnNum));
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Buffer := 'Welcome to Brads Server 1.0'+#10+#13+'You Are Connection '+
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InttoStr(ConnNum)+' Of '+InttoStr(NumberofConnections)+
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', With '+InttoStr(FreeConnections)+' Connections Free'#13+#10;
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Sent := Send(Handle,Buffer[1],Length(Buffer),0);
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If Sent <> Length(Buffer) Then
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PDebug('Wanted to Send : ' +InttoStr(Length(Buffer))+' Sent Only : '
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+InttoStr(Sent)+' to Connection : '+InttoStr(ConnNum));
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End;
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Procedure AcceptNewConnection;
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Var ConnectionNumber : Integer;
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Handle : LongInt;
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FromAddrSize : LongInt;
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FromAddr : TInetSockAddr;
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Handle : LongInt;
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FromAddrSize : LongInt;
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FromAddr : TInetSockAddr;
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Begin
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FromAddrSize := Sizeof(FromAddr);
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If FreeConnections > 0 then Begin
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ConnectionNumber := GetFreeConnection;
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PDebug('Accepting New Connection Number : '+InttoStr(ConnectionNumber));
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Handle := Accept(S,FromAddr,FromAddrSize);
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If Handle < 0 then PError('Accept Error!!');
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PDebug('Accepted From : '+SockAddrtoString(FromAddr.Addr)+' Port : '
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+Inttostr(Swap(FromAddr.Port)));
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Connection[ConnectionNumber].Handle := Handle;
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Connection[ConnectionNumber].IP := FromAddr.Addr;
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Connection[ConnectionNumber].Port := FromAddr.Port;
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Connection[ConnectionNumber].Connected := True;
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Connection[ConnectionNumber].IdleTimer := 0;
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WelcomeHandle(Handle,ConnectionNumber);
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End;
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FromAddrSize := Sizeof(FromAddr);
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If FreeConnections > 0 Then
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Begin
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ConnectionNumber := GetFreeConnection;
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PDebug('Accepting New Connection Number : '+InttoStr(ConnectionNumber));
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Handle := Accept(S,FromAddr,FromAddrSize);
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If Handle < 0 Then PError('Accept Error!!');
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PDebug('Accepted From : '+SockAddrtoString(FromAddr.Addr)+' Port : '
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+Inttostr(Swap(FromAddr.Port)));
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Connection[ConnectionNumber].Handle := Handle;
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Connection[ConnectionNumber].IP := FromAddr.Addr;
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Connection[ConnectionNumber].Port := FromAddr.Port;
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Connection[ConnectionNumber].Connected := True;
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Connection[ConnectionNumber].IdleTimer := 0;
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WelcomeHandle(Handle,ConnectionNumber);
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End;
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End;
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Procedure SetUpSocket;
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Var
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SockAddr : TInetSockAddr;
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SockAddr : TInetSockAddr;
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yes : longint;
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Begin
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SockAddr.Family := AF_INET;
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SockAddr.Port := Swap(PortNumber);
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SockAddr.Addr := 0;
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S := Socket(AF_INET,SOCK_STREAM,0);
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If SocketError <> 0 then PError('Socket Error : ');
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If not Bind(S,SockAddr,SizeOf(SockAddr)) then PError('Bind Error : ');
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If not Listen(S,5) then PError('Listen Error : ');
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SockAddr.Family := AF_INET;
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SockAddr.Port := Swap(PortNumber);
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SockAddr.Addr := 0;
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S := Socket(AF_INET,SOCK_STREAM,0);
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If SocketError <> 0 Then PError('Socket Error : ');
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yes := $1010101; {Copied this from existing code. Value is empiric,
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but works. (yes=true<>0) }
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SetSocketOptions(s, SOL_SOCKET, SO_REUSEADDR,yes,sizeof(yes));
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If Not Bind(S,SockAddr,SizeOf(SockAddr)) Then PError('Bind Error : ');
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If Not Listen(S,5) Then PError('Listen Error : ');
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End;
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Procedure LoadConnectedFDS;
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Var Loop : Integer;
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Begin
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For Loop := 1 to NumberOfConnections Do
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If Connection[Loop].Connected then
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Begin
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FD_SET(Connection[Loop].Handle,FDS);
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If Connection[Loop].Handle > GreatestHandle then
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GreatestHandle := Connection[Loop].Handle;
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End;
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For Loop := 1 To NumberOfConnections Do
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If Connection[Loop].Connected Then
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Begin
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FD_SET(Connection[Loop].Handle,FDS);
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If Connection[Loop].Handle > GreatestHandle Then
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GreatestHandle := Connection[Loop].Handle;
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End;
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End;
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Procedure ServiceHandle(Handle, ConnectionNum : Integer);
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Var Buffer : String;
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Sent, BufferLength : Integer;
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Begin
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Writeln('Service Handle : ',Handle);
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BufferLength := Recv(Handle,Buffer[1],200,0);
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Setlength(Buffer,BufferLength);
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If SocketError <> 0 then PDebug('Reciceved Socket Error : '
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+InttoStr(SocketError)+' OnHandle '+InttoStr(Handle));
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Sent, BufferLength : Integer;
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If BufferLength = 0 then {It's EOF, Socket has been closed}
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Begin
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PDebug('Socket Handle '+InttoStr(Handle)+' Closed');
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Connection[ConnectionNum].Connected := False;
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Shutdown(Handle,2);
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fdClose(Handle);
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End
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Writeln('Service Handle : ',Handle);
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BufferLength := Recv(Handle,Buffer[1],200,0);
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Setlength(Buffer,BufferLength);
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If SocketError <> 0 Then
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PDebug('Reciceved Socket Error : '
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+InttoStr(SocketError)+' OnHandle '+InttoStr(Handle));
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Else Begin
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PDebug(InttoStr(BufferLength)+' Bytes Recieved');
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{Buffer := Db_Query(Buffer);}
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Sent := Send(Handle,Buffer[1],Length(Buffer),0);
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If Sent <> Bufferlength then
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PDebug('Wanted to Send : '+InttoStr(Length(Buffer))+' Only Sent : '+InttoStr(Sent));
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End;
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If BufferLength = 0 Then {It's EOF, Socket has been closed}
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Begin
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PDebug('Socket Handle '+InttoStr(Handle)+' Closed');
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Connection[ConnectionNum].Connected := False;
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Shutdown(Handle,2);
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fdClose(Handle);
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End
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Else
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Begin
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PDebug(InttoStr(BufferLength)+' Bytes Recieved');
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{Buffer := Db_Query(Buffer);}
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Sent := Send(Handle,Buffer[1],Length(Buffer),0);
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If Sent <> Bufferlength Then
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PDebug('Wanted to Send : '+InttoStr(Length(Buffer))+' Only Sent : '+InttoStr(Sent));
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End;
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End;
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Procedure ServiceSockets;
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Var Loop : Integer;
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Begin
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For Loop := 1 to NumberOfConnections do
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If Connection[Loop].Connected then
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If FD_ISSET(Connection[Loop].Handle,FDS) Then
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ServiceHandle(Connection[Loop].Handle,Loop);
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For Loop := 1 To NumberOfConnections Do
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If Connection[Loop].Connected Then
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If FD_ISSET(Connection[Loop].Handle,FDS) Then
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ServiceHandle(Connection[Loop].Handle,Loop);
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IF FD_ISSET(S,FDS) then AcceptNewConnection;
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If FD_ISSET(S,FDS) Then AcceptNewConnection;
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End;
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Procedure CloseAllOpen;
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Var Loop : Integer;
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Begin
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For Loop := 1 to NumberOfConnections do
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Begin
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If Connection[Loop].Connected = True then
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Begin
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Shutdown(Connection[Loop].Handle,1);
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For Loop := 1 To NumberOfConnections Do
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Begin
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If Connection[Loop].Connected = True Then
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Begin
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Shutdown(Connection[Loop].Handle,1);
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{ fdClose(Connection[Loop].Handle);}
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{Connection[Loop].Connected := False;}
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End;
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End;
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End;
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End;
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End;
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begin
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ZeroConnection; {Clear Connected Array}
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Quit := False;
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PortNumber := 5000;
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SetupSocket;
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Repeat
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FD_ZERO(FDS);
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FD_SET(S,FDS); { Socket Looking for new connections }
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FD_SET(1,FDS); { Terminal }
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GreatestHandle := S;
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LoadConnectedFDS;
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If Select(GreatestHandle+1,@FDS,nil,nil,1000) > 0 then
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Begin
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ServiceSockets;
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If FD_ISSET(1,FDS) then
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Begin
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PDebug('Reading Console');
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Readln(Command);
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If Command='quit' then quit := True;
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ZeroConnection; {Clear Connected Array}
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Quit := False;
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PortNumber := 5000;
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SetupSocket;
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Repeat
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FD_ZERO(FDS);
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FD_SET(S,FDS); { Socket Looking for new connections }
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FD_SET(1,FDS); { Terminal }
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GreatestHandle := S;
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LoadConnectedFDS;
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If Select(GreatestHandle+1,@FDS,Nil,Nil,1000) > 0 Then
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Begin
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ServiceSockets;
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If FD_ISSET(1,FDS) Then
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Begin
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PDebug('Reading Console');
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Readln(Command);
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If Command='quit' Then quit := True;
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{ Else Writeln(DB_Query(Command));}
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Command := '';
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End;
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End;
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{DB_Tic;} {Updates Database Internals, Needs at Least 1 run per second}
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Until Quit = True;
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CloseAllOpen;
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Command := '';
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End;
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End;
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{DB_Tic;} {Updates Database Internals, Needs at Least 1 run per second}
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Until Quit = True;
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CloseAllOpen;
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End.
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End.
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