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Simba/Units/Synapse/tlntsend.pas
2010-03-13 16:33:04 +01:00

365 lines
11 KiB
ObjectPascal

{==============================================================================|
| Project : Ararat Synapse | 001.003.001 |
|==============================================================================|
| Content: TELNET and SSH2 client |
|==============================================================================|
| Copyright (c)1999-2010, Lukas Gebauer |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| Redistributions of source code must retain the above copyright notice, this |
| list of conditions and the following disclaimer. |
| |
| Redistributions in binary form must reproduce the above copyright notice, |
| this list of conditions and the following disclaimer in the documentation |
| and/or other materials provided with the distribution. |
| |
| Neither the name of Lukas Gebauer nor the names of its contributors may |
| be used to endorse or promote products derived from this software without |
| specific prior written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR |
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| DAMAGE. |
|==============================================================================|
| The Initial Developer of the Original Code is Lukas Gebauer (Czech Republic).|
| Portions created by Lukas Gebauer are Copyright (c)2002-2010. |
| All Rights Reserved. |
|==============================================================================|
| Contributor(s): |
|==============================================================================|
| History: see HISTORY.HTM from distribution package |
| (Found at URL: http://www.ararat.cz/synapse/) |
|==============================================================================}
{:@abstract(Telnet script client)
Used RFC: RFC-854
}
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
{$H+}
{$IFDEF UNICODE}
{$WARN IMPLICIT_STRING_CAST OFF}
{$WARN IMPLICIT_STRING_CAST_LOSS OFF}
{$ENDIF}
unit tlntsend;
interface
uses
SysUtils, Classes,
blcksock, synautil;
const
cTelnetProtocol = '23';
cSSHProtocol = '22';
TLNT_EOR = #239;
TLNT_SE = #240;
TLNT_NOP = #241;
TLNT_DATA_MARK = #242;
TLNT_BREAK = #243;
TLNT_IP = #244;
TLNT_AO = #245;
TLNT_AYT = #246;
TLNT_EC = #247;
TLNT_EL = #248;
TLNT_GA = #249;
TLNT_SB = #250;
TLNT_WILL = #251;
TLNT_WONT = #252;
TLNT_DO = #253;
TLNT_DONT = #254;
TLNT_IAC = #255;
type
{:@abstract(State of telnet protocol). Used internaly by TTelnetSend.}
TTelnetState =(tsDATA, tsIAC, tsIAC_SB, tsIAC_WILL, tsIAC_DO, tsIAC_WONT,
tsIAC_DONT, tsIAC_SBIAC, tsIAC_SBDATA, tsSBDATA_IAC);
{:@abstract(Class with implementation of Telnet/SSH script client.)
Note: Are you missing properties for specify server address and port? Look to
parent @link(TSynaClient) too!}
TTelnetSend = class(TSynaClient)
private
FSock: TTCPBlockSocket;
FBuffer: Ansistring;
FState: TTelnetState;
FSessionLog: Ansistring;
FSubNeg: Ansistring;
FSubType: Ansichar;
FTermType: Ansistring;
function Connect: Boolean;
function Negotiate(const Buf: Ansistring): Ansistring;
procedure FilterHook(Sender: TObject; var Value: AnsiString);
public
constructor Create;
destructor Destroy; override;
{:Connects to Telnet server.}
function Login: Boolean;
{:Connects to SSH2 server and login by Username and Password properties.
You must use some of SSL plugins with SSH support. For exammple CryptLib.}
function SSHLogin: Boolean;
{:Logout from telnet server.}
procedure Logout;
{:Send this data to telnet server.}
procedure Send(const Value: string);
{:Reading data from telnet server until Value is readed. If it is not readed
until timeout, result is @false. Otherwise result is @true.}
function WaitFor(const Value: string): Boolean;
{:Read data terminated by terminator from telnet server.}
function RecvTerminated(const Terminator: string): string;
{:Read string from telnet server.}
function RecvString: string;
published
{:Socket object used for TCP/IP operation. Good for seting OnStatus hook, etc.}
property Sock: TTCPBlockSocket read FSock;
{:all readed datas in this session (from connect) is stored in this large
string.}
property SessionLog: Ansistring read FSessionLog write FSessionLog;
{:Terminal type indentification. By default is 'SYNAPSE'.}
property TermType: Ansistring read FTermType write FTermType;
end;
implementation
constructor TTelnetSend.Create;
begin
inherited Create;
FSock := TTCPBlockSocket.Create;
FSock.Owner := self;
FSock.OnReadFilter := FilterHook;
FTimeout := 60000;
FTargetPort := cTelnetProtocol;
FSubNeg := '';
FSubType := #0;
FTermType := 'SYNAPSE';
end;
destructor TTelnetSend.Destroy;
begin
FSock.Free;
inherited Destroy;
end;
function TTelnetSend.Connect: Boolean;
begin
// Do not call this function! It is calling by LOGIN method!
FBuffer := '';
FSessionLog := '';
FState := tsDATA;
FSock.CloseSocket;
FSock.LineBuffer := '';
FSock.Bind(FIPInterface, cAnyPort);
FSock.Connect(FTargetHost, FTargetPort);
Result := FSock.LastError = 0;
end;
function TTelnetSend.RecvTerminated(const Terminator: string): string;
begin
Result := FSock.RecvTerminated(FTimeout, Terminator);
end;
function TTelnetSend.RecvString: string;
begin
Result := FSock.RecvTerminated(FTimeout, CRLF);
end;
function TTelnetSend.WaitFor(const Value: string): Boolean;
begin
Result := FSock.RecvTerminated(FTimeout, Value) <> '';
end;
procedure TTelnetSend.FilterHook(Sender: TObject; var Value: AnsiString);
begin
Value := Negotiate(Value);
FSessionLog := FSessionLog + Value;
end;
function TTelnetSend.Negotiate(const Buf: Ansistring): Ansistring;
var
n: integer;
c: Ansichar;
Reply: Ansistring;
SubReply: Ansistring;
begin
Result := '';
for n := 1 to Length(Buf) do
begin
c := Buf[n];
Reply := '';
case FState of
tsData:
if c = TLNT_IAC then
FState := tsIAC
else
Result := Result + c;
tsIAC:
case c of
TLNT_IAC:
begin
FState := tsData;
Result := Result + TLNT_IAC;
end;
TLNT_WILL:
FState := tsIAC_WILL;
TLNT_WONT:
FState := tsIAC_WONT;
TLNT_DONT:
FState := tsIAC_DONT;
TLNT_DO:
FState := tsIAC_DO;
TLNT_EOR:
FState := tsDATA;
TLNT_SB:
begin
FState := tsIAC_SB;
FSubType := #0;
FSubNeg := '';
end;
else
FState := tsData;
end;
tsIAC_WILL:
begin
case c of
#3: //suppress GA
Reply := TLNT_DO;
else
Reply := TLNT_DONT;
end;
FState := tsData;
end;
tsIAC_WONT:
begin
Reply := TLNT_DONT;
FState := tsData;
end;
tsIAC_DO:
begin
case c of
#24: //termtype
Reply := TLNT_WILL;
else
Reply := TLNT_WONT;
end;
FState := tsData;
end;
tsIAC_DONT:
begin
Reply := TLNT_WONT;
FState := tsData;
end;
tsIAC_SB:
begin
FSubType := c;
FState := tsIAC_SBDATA;
end;
tsIAC_SBDATA:
begin
if c = TLNT_IAC then
FState := tsSBDATA_IAC
else
FSubNeg := FSubNeg + c;
end;
tsSBDATA_IAC:
case c of
TLNT_IAC:
begin
FState := tsIAC_SBDATA;
FSubNeg := FSubNeg + c;
end;
TLNT_SE:
begin
SubReply := '';
case FSubType of
#24: //termtype
begin
if (FSubNeg <> '') and (FSubNeg[1] = #1) then
SubReply := #0 + FTermType;
end;
end;
Sock.SendString(TLNT_IAC + TLNT_SB + FSubType + SubReply + TLNT_IAC + TLNT_SE);
FState := tsDATA;
end;
else
FState := tsDATA;
end;
else
FState := tsData;
end;
if Reply <> '' then
Sock.SendString(TLNT_IAC + Reply + c);
end;
end;
procedure TTelnetSend.Send(const Value: string);
begin
Sock.SendString(ReplaceString(Value, TLNT_IAC, TLNT_IAC + TLNT_IAC));
end;
function TTelnetSend.Login: Boolean;
begin
Result := False;
if not Connect then
Exit;
Result := True;
end;
function TTelnetSend.SSHLogin: Boolean;
begin
Result := False;
if Connect then
begin
FSock.SSL.SSLType := LT_SSHv2;
FSock.SSL.Username := FUsername;
FSock.SSL.Password := FPassword;
FSock.SSLDoConnect;
Result := FSock.LastError = 0;
end;
end;
procedure TTelnetSend.Logout;
begin
FSock.CloseSocket;
end;
end.