531 lines
13 KiB
ObjectPascal
531 lines
13 KiB
ObjectPascal
Unit MIS_Client_NNTP;
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{$I M_OPS.PAS}
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// RFC 977
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Interface
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Uses
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SysUtils,
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m_Strings,
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m_FileIO,
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m_Socket_Class,
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m_DateTime,
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MIS_Server,
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MIS_NodeData,
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MIS_Common;
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Function CreateNNTP (Owner: TServerManager; Config: RecConfig; ND: TNodeData; CliSock: TSocketClass) : TServerClient;
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Type
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TNNTPServer = Class(TServerClient)
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Server : TServerManager;
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UserName : String[30];
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LoggedIn : Boolean;
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Cmd : String;
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Data : String;
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User : RecUser;
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UserPos : LongInt;
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MBase : RecMessageBase;
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MBasePos : LongInt;
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EndSession : Boolean;
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Constructor Create (Owner: TServerManager; CliSock: TSocketClass);
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Procedure Execute; Override;
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Destructor Destroy; Override;
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Procedure ClientWriteLine (Str: String);
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Procedure ResetSession;
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Procedure cmd_AUTHINFO;
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Procedure cmd_GROUP;
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Procedure cmd_LIST;
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Procedure cmd_POST;
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Procedure cmd_XOVER;
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End;
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Implementation
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Uses
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Classes,
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bbs_MsgBase_ABS,
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bbs_MsgBase_JAM,
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bbs_MsgBase_Squish;
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Const
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FileReadBuffer = 2048;
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HackThreshold = 10000;
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fn_SemFileEcho = 'echomail.now';
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fn_SemFileNews = 'newsmail.now';
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re_Greeting = '200 Mystic BBS NNTP server ready';
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re_Goodbye = '205 Goodbye';
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re_ListFollows = '215 List follows';
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re_AuthOK = '281 Authentication accepted';
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re_AuthBad = '381 Authentication rejected';
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re_AuthPass = '381 Password required';
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re_AuthReq = '450 Auth required';
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re_AuthSync = '482 Bad Authentication sequence';
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re_Unknown = '500 Unknown command';
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re_UnknownOption = '501 Unknown option';
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Function CreateNNTP (Owner: TServerManager; Config: RecConfig; ND: TNodeData; CliSock: TSocketClass) : TServerClient;
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Begin
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Result := TNNTPServer.Create(Owner, CliSock);
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End;
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Constructor TNNTPServer.Create (Owner: TServerManager; CliSock: TSocketClass);
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Begin
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Inherited Create(Owner, CliSock);
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Server := Owner;
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End;
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Procedure TNNTPServer.ClientWriteLine (Str: String);
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Begin
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Server.Server.Status('S:' + Str);
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Client.WriteLine(Str);
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End;
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Procedure TNNTPServer.ResetSession;
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Begin
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LoggedIn := False;
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UserName := '';
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UserPos := -1;
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MBasePos := -1;
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EndSession := False;
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End;
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Procedure TNNTPServer.cmd_AUTHINFO;
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Var
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NewCmd : String;
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NewData : String;
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Begin
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NewCmd := strWordGet(1, Data, ' ');
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NewData := Copy(Data, Pos(' ', Data) + 1, 255);
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If NewCmd = 'USER' Then Begin
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If SearchForUser(NewData, User, UserPos) Then Begin
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ClientWriteLine(re_AuthPass);
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UserName := NewData;
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End Else
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ClientWriteLine(re_AuthBad);
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End Else
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If NewCmd = 'PASS' Then Begin
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If UserPos = -1 Then
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ClientWriteLine(re_AuthSync)
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Else
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If strUpper(NewData) = User.Password Then Begin
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ClientWriteLine(re_AuthOK);
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LoggedIn := True;
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End Else
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ClientWriteLine(re_AuthBad);
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End Else
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ClientWriteLine(re_UnknownOption);
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If LoggedIn Then
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Server.Server.Status('Logged in as ' + UserName);
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End;
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Procedure TNNTPServer.cmd_GROUP;
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Var
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MBaseFile : TBufFile;
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TempBase : RecMessageBase;
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MsgBase : PMsgBaseABS;
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Active : LongInt = 0;
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Low : LongInt = 0;
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High : LongInt = 0;
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Found : Boolean = False;
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Begin
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If Not LoggedIn Then Begin
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ClientWriteLine(re_AuthReq);
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Exit;
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End;
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MBaseFile := TBufFile.Create(FileReadBuffer);
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If MBaseFile.Open(bbsConfig.DataPath + 'mbases.dat', fmOpen, fmRWDN, SizeOf(RecMessageBase)) Then Begin
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MBaseFile.Read(TempBase);
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While Not MBaseFile.EOF Do Begin
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MBaseFile.Read(TempBase);
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If (TempBase.NewsName = Data) and CheckAccess(User, True, TempBase.ReadACS) Then Begin
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Found := True;
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Case TempBase.BaseType of
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0 : MsgBase := New(PMsgBaseJAM, Init);
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1 : MsgBase := New(PMsgBaseSquish, Init);
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End;
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MsgBase^.SetMsgPath (TempBase.Path + TempBase.FileName);
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If MsgBase^.OpenMsgBase Then Begin
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Low := 1;
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High := MsgBase^.GetHighMsgNum;
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Active := MsgBase^.NumberOfMsgs;
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End;
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Dispose (MsgBase, Done);
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MBase := TempBase;
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MBasePos := MBaseFile.FilePos;
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ClientWriteLine('211 ' + strI2S(Active) + ' ' + strI2S(Low) + ' ' + strI2S(High) + ' ' + TempBase.NewsName);
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Break;
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End;
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End;
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End;
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MBaseFile.Free;
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If Not Found Then
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ClientWriteLine('411 No such newsgroup');
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End;
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Procedure TNNTPServer.cmd_LIST;
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Var
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MBaseFile : TBufFile;
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TempBase : RecMessageBase;
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MsgBase : PMsgBaseABS;
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LowMessage : LongInt;
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HighMessage : LongInt;
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PostAbility : Char;
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Begin
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If Not LoggedIn Then Begin
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ClientWriteLine(re_AuthReq);
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Exit;
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End;
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ClientWriteLine(re_ListFollows);
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If Data = 'OVERVIEW.FMT' Then Begin
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ClientWriteLine ('Subject:');
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ClientWriteLine ('From:');
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ClientWriteLine ('Date:');
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ClientWriteLine ('Message-ID:');
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ClientWriteLine ('References:');
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ClientWriteLine ('Bytes:');
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ClientWriteLine ('Lines:');
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ClientWriteLine ('.');
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// find this in RFC to make sure this website isnt wrong
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Exit;
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End;
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MBaseFile := TBufFile.Create(FileReadBuffer);
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If MBaseFile.Open(bbsConfig.DataPath + 'mbases.dat', fmOpen, fmRWDN, SizeOf(RecMessageBase)) Then Begin
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MBaseFile.Read(TempBase);
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While Not MBaseFile.EOF Do Begin
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MBaseFile.Read(TempBase);
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If TempBase.NewsName = '' Then Continue;
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If CheckAccess(User, True, TempBase.ListACS) Then Begin
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LowMessage := 0;
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HighMessage := 0;
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Case CheckAccess(User, True, TempBase.PostACS) of
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False : PostAbility := 'n';
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True : PostAbility := 'y';
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End;
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Case TempBase.BaseType of
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0 : MsgBase := New(PMsgBaseJAM, Init);
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1 : MsgBase := New(PMsgBaseSquish, Init);
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End;
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MsgBase^.SetMsgPath (TempBase.Path + TempBase.FileName);
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If MsgBase^.OpenMsgBase Then Begin
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LowMessage := 1;
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HighMessage := MsgBase^.GetHighActiveMsgNum;
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End;
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Dispose (MsgBase, Done);
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ClientWriteLine (TempBase.NewsName + ' ' + strI2S(LowMessage) + ' ' + strI2S(HighMessage) + ' ' + PostAbility);
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End;
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End;
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End;
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MBaseFile.Free;
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ClientWriteLine('.');
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End;
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Procedure TNNTPServer.cmd_POST;
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Var
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MsgBase : PMsgBaseABS;
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MBaseFile : TBufFile;
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TempBase : RecMessageBase;
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MsgText : TStringList;
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Subject : String;
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Newsgroup : String;
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InData : String;
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HackCount : LongInt;
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Count : LongInt;
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GotStart : Boolean;
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Found : Boolean;
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SemFile : File;
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Begin
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If Not LoggedIn Then Begin
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ClientWriteLine(re_AuthReq);
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Exit;
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End;
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ClientWriteLine('340 Send article to be posted. End with <CRLF>.<CRLF>');
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Subject := '';
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Newsgroup := '';
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GotStart := False;
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MsgText := TStringList.Create;
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Repeat
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Client.ReadLine(InData);
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If InData = '.' Then Break;
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If Not GotStart And (Pos('Newsgroups:', InData) > 0) Then Begin
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Newsgroup := Copy(InData, 13, 255);
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Continue;
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End;
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If Not GotStart And (Pos('Subject:', InData) > 0) Then Begin
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Subject := Copy(InData, 10, 255);
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Continue;
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End;
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If (InData = '') And Not GotStart Then Begin
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GotStart := True;
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Continue;
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End;
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If MsgText.Count >= mysMaxMsgLines Then Begin
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HackCount := 0;
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While Not Terminated And (InData <> '.') Do Begin
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Client.ReadLine(InData);
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Inc (HackCount);
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If HackCount >= HackThreshold Then Begin
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EndSession := True; // someone is being a douchebag
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Server.Server.Status('Flood attempt from ' + Client.PeerIP + '. Goodbye');
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MsgText.Free;
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Exit;
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End;
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End;
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Break;
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End;
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If GotStart Then MsgText.Add(InData);
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Until Terminated;
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If Terminated Then Exit;
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If (Subject = '') Then Begin
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MsgText.Free;
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ClientWriteLine('441 No subject; message not posted');
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Exit;
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End;
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Found := False;
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MBaseFile := TBufFile.Create(FileReadBuffer);
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If MBaseFile.Open(bbsConfig.DataPath + 'mbases.dat', fmOpen, fmRWDN, SizeOf(RecMessageBase)) Then Begin
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MBaseFile.Read(TempBase);
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While Not MBaseFile.EOF Do Begin
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MBaseFile.Read(TempBase);
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If TempBase.NewsName = Newsgroup Then Begin
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Found := True;
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Break;
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End;
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End;
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End;
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MBaseFile.Free;
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If Not Found or (Newsgroup = '') Then Begin
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MsgText.Free;
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ClientWriteLine('441 No newsgroup selected');
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Exit;
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End;
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If Not CheckAccess(User, True, TempBase.PostACS) or (TempBase.NetType = 3) Then Begin
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MsgText.Free;
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ClientWriteLine('441 No post access');
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Exit;
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End;
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Case TempBase.BaseType of
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0 : MsgBase := New(PMsgBaseJAM, Init);
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1 : MsgBase := New(PMsgBaseSquish, Init);
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End;
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MsgBase^.SetMsgPath (TempBase.Path + TempBase.FileName);
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If Not MsgBase^.OpenMsgBase Then
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If Not MsgBase^.CreateMsgBase (TempBase.MaxMsgs, TempBase.MaxAge) Then Begin
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Dispose(MsgBase, Done);
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MsgText.Free;
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Client.WriteLine('441 Cannot save');
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Exit;
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End Else
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If Not MsgBase^.OpenMsgBase Then Begin
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Dispose(MsgBase, Done);
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MsgText.Free;
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Client.WriteLine('411 Cannot save');
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Exit;
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End;
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MsgBase^.StartNewMsg;
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MsgBase^.SetLocal (True);
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MsgBase^.SetDate (FormatDateTime('mm/dd/yy', Now));
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MsgBase^.SetTime (FormatDateTime('hh:nn', Now));
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MsgBase^.SetTo ('All');
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MsgBase^.SetSubj (Subject);
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If TempBase.Flags And MBRealNames <> 0 Then
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MsgBase^.SetFrom(User.RealName)
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Else
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MsgBase^.SetFrom(User.Handle);
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If TempBase.NetType > 0 Then Begin
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MsgBase^.SetMailType(mmtEchoMail);
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Case TempBase.NetType of
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1 : Assign (SemFile, bbsConfig.SemaPath + fn_SemFileEcho);
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2 : Assign (SemFile, bbsConfig.SemaPath + fn_SemFileNews);
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End;
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ReWrite (SemFile);
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Close (SemFile);
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End Else
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MsgBase^.SetMailType(mmtNormal);
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MsgBase^.SetPriv (TempBase.Flags and MBPrivate <> 0);
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For Count := 1 to MsgText.Count Do Begin
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InData := MsgText.Strings[Count - 1];
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If Length(InData) > 79 Then InData[0] := #79;
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MsgBase^.DoStringLn(InData);
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End;
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MsgBase^.WriteMsg;
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MsgBase^.CloseMsgBase;
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Dispose (MsgBase, Done);
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MsgText.Free;
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ClientWriteLine ('240 Artical posted ok');
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End;
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Procedure TNNTPServer.cmd_XOVER;
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Var
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First : LongInt = 0;
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Last : LongInt = 0;
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Found : Boolean = False;
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Begin
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If Not LoggedIn Then Begin
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ClientWriteLine(re_AuthReq);
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Exit;
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End;
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If MBasePos = -1 Then Begin
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ClientWriteLine('412 No newsgroup selected');
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Exit;
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End;
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If Pos('-', Data) > 0 Then Begin
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First := strS2I(strWordGet(1, Data, '-'));
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Last := strS2I(strWordGet(2, Data, '-'));
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End Else Begin
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First := strS2I(Data);
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Last := First;
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End;
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// if last = 0 and first <> 0 then
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// last = all messages
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// else
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// first = current article (what sets this value)
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// last = current article (what sets this value)
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// 224 Overview information
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// send messages here
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// set found if a message was found. format per line then a term line is:
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// msgnum + tab + subj + tab + from + tab + datetime + tab + #0 + tab + msgbytes + tab + msglines + tab + #0
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// .
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// confusion: if no article send error below or tab tab? ive read both.
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If Not Found Then
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ClientWriteLine('420 No article(s) selected');
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End;
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Procedure TNNTPServer.Execute;
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Var
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Str : String;
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Begin
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ResetSession;
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ClientWriteLine(re_Greeting);
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Repeat
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If Client.WaitForData(bbsConfig.inetNNTPTimeout * 1000) = 0 Then Break;
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If Terminated Then Exit;
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If Client.ReadLine(Str) = -1 Then Exit;
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Server.Server.Status('C:' + Str);
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Cmd := strUpper(strWordGet(1, Str, ' '));
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If Pos(' ', Str) > 0 Then
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Data := strStripB(Copy(Str, Pos(' ', Str) + 1, Length(Str)), ' ')
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Else
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Data := '';
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If Cmd = 'AUTHINFO' Then cmd_AUTHINFO Else
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If Cmd = 'GROUP' Then cmd_GROUP Else
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If Cmd = 'LIST' Then cmd_LIST Else
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If Cmd = 'POST' Then cmd_POST Else
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If Cmd = 'QUIT' Then Break Else
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If Cmd = 'XOVER' Then cmd_XOVER Else
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ClientWriteLine(re_Unknown);
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Until Terminated or EndSession;
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If Not Terminated Then ClientWriteLine(re_Goodbye);
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End;
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Destructor TNNTPServer.Destroy;
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Begin
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Inherited Destroy;
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End;
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End.
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