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send函数

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The Nine

delphi编写的载封包

在Windows XP,D7编译测试通过

HOOK.DLL源码

library HOOK;

{ Important note about DLL memory management: ShareMem must be the

  first unit in your library's USES clause AND your project's (select

  Project-View Source) USES clause if your DLL exports any procedures or

  functions that pass...

在Windows XP,D7编译测试通过

HOOK.DLL源码

library HOOK;

{ Important note about DLL memory management: ShareMem must be the

  first unit in your library's USES clause AND your project's (select

  Project-View Source) USES clause if your DLL exports any procedures or

  functions that pass strings as parameters or function results. This

  applies to all strings passed to and from your DLL--even those that

  are nested in records and classes. ShareMem is the interface unit to

  the BORLNDMM.DLL shared memory manager, which must be deployed along

  with your DLL. To avoid using BORLNDMM.DLL, pass string information

  using PChar or ShortString parameters. }


uses

SysUtils,

windows,

Messages,

APIHook in 'APIHook.pas';

type

PData = ^TData;

TData = record

Hook: THandle;

Hooked: Boolean;

end;

var

DLLData: PData;

{------------------------------------}

{过程名:HookProc

{过程功能:HOOK过程

{过程参数:nCode, wParam, lParam消息的相

{ 关参数

{------------------------------------}

procedure HookProc(nCode, wParam, lParam: LongWORD);stdcall;

begin

if not DLLData^.Hooked then

begin

HookAPI;

DLLData^.Hooked := True;

end;

//调用下一个Hook

CallNextHookEx(DLLData^.Hook, nCode, wParam, lParam);

end;

{------------------------------------}

{函数名:InstallHook

{函数功能:在指定窗口上安装HOOK

{函数参数:sWindow:要安装HOOK的窗口

{返回值:成功返回TRUE,失败返回FALSE

{------------------------------------}

function InstallHook(SWindow: LongWORD):Boolean;stdcall;

var

ThreadID: LongWORD;

begin

Result := False;

DLLData^.Hook := 0;

ThreadID := GetWindowThreadProcessId(sWindow, nil);

//给指定窗口挂上钩子

DLLData^.Hook := SetWindowsHookEx(WH_GETMESSAGE, @HookProc, Hinstance, ThreadID);

if DLLData^.Hook > 0 then

Result := True //是否成功HOOK

else

exIT;

end;

{------------------------------------}

{过程名:UnHook

{过程功能:卸载HOOK

{过程参数:无

{------------------------------------}

procedure UnHook;stdcall;

begin

UnHookAPI;

//卸载Hook

UnhookWindowsHookEx(DLLData^.Hook);

end;

{------------------------------------}

{过程名:DLL入口函数

{过程功能:进行DLL初始化,释放等

{过程参数:DLL状态

{------------------------------------}

procedure MyDLLHandler(Reason: Integer);

var

FHandle: LongWORD;

begin

case Reason of

DLL_PROCESS_ATTACH:

begin //建立文件映射,以实现DLL中的全局变量

FHandle := CreateFileMapping($FFFFFFFF, nil, PAGE_READWRITE, 0, $ffff, 'MYDLLDATA');

if FHandle = 0 then

if GetLastError = ERROR_ALREADY_EXISTS then

begin

FHandle := OpenFileMapping(FILE_MAP_ALL_ACCESS, False, 'MYDLLDATA');

if FHandle = 0 then Exit;

end else Exit;

DLLData := MapViewOfFile(FHandle, FILE_MAP_ALL_ACCESS, 0, 0, 0);

if DLLData = nil then

CloseHandle(FHandle);

end;

DLL_PROCESS_DETACH:

begin

if Assigned(DLLData) then

begin

UnmapViewOfFile(DLLData);

DLLData := nil;

end;

end;

end;

end;

{$R *.res}

exports

InstallHook, UnHook, HookProc;

begin

DLLProc := @MyDLLHandler;

MyDLLhandler(DLL_PROCESS_ATTACH);

DLLData^.Hooked := False;

end.

'APIHook.pas'源码

unit APIHook;

interface

uses

SysUtils,

Dialogs,

Windows, WinSock;

type

//要HOOK的API函数定义

TSockProc = function (s: TSocket; var Buf; len, flags: Integer): Integer; stdcall;

PJmpCode = ^TJmpCode;

TJmpCode = packed record

JmpCode: BYTE;

Address: TSockProc;

MovEAX: Array [0..2] of BYTE;

end;

//--------------------函数声明---------------------------

procedure HookAPI;

procedure UnHookAPI;

procedure SaveInfo(var buf); stdcall;

function recvout(var Rbuf;RLen:Integer):Integer;

var

OldSend, OldRecv: TSockProc; //原来的API地址

JmpCode: TJmpCode;

OldProc: array [0..1] of TJmpCode;

AddSend, AddRecv: pointer; //API地址

TmpJmp: TJmpCode;

ProcessHandle: THandle;

implementation

procedure SaveInfo(var buf); stdcall;

var

  f: file;

  FileName:string;

begin

  {保存为文件信息}

  FileName:='c:\test.txt';

  assignfile(f, FileName);

  closefile(f);

end;

function recvout(var Rbuf;RLen:Integer):Integer;

Var

buf1:pchar;

i:integer;

ss:string;

Begin

buf1:=@Rbuf;

for i:=1 to Rlen do

    Begin

      ss:=ss+inttohex(byte(buf1^),2)+' ';

      buf1:=buf1+1;

    End;

ShowMessage('封包内容[16进制]:'+ss);

ShowMessage('发送封包长度:'+inttostr(Rlen));

End;

{---------------------------------------}

{函数功能:Send函数的HOOK

{函数参数:同Send

{函数返回值:integer

{---------------------------------------}

function MySend(s: TSocket; var Buf; len, flags: Integer): Integer; stdcall;

var

dwSize: cardinal;

begin

//这儿进行发送的数据处理

MessageBeep(1000); //简单的响一声

recvout(Buf,len);

//SaveInfo(Buf);

//调用直正的Send函数

WriteProcessMemory(ProcessHandle, AddSend, @OldProc[0], 8, dwSize);

Result := OldSend(S, Buf, len, flags);

JmpCode.Address := @MySend;

WriteProcessMemory(ProcessHandle, AddSend, @JmpCode, 8, dwSize);

end;

{---------------------------------------}

{函数功能:Recv函数的HOOK

{函数参数:同Recv

{函数返回值:integer

{---------------------------------------}

function MyRecv(s: TSocket; var Buf; len, flags: Integer): Integer; stdcall;

var

dwSize: cardinal;

begin

//这儿进行接收的数据处理

MessageBeep(1000); //简单的响一声

//调用直正的Recv函数

WriteProcessMemory(ProcessHandle, AddRecv, @OldProc[1], 8, dwSize);

Result := OldRecv(S, Buf, len, flags);

JmpCode.Address := @MyRecv;

WriteProcessMemory(ProcessHandle, AddRecv, @JmpCode, 8, dwSize);

end;

{------------------------------------}

{过程功能:HookAPI

{过程参数:无

{------------------------------------}

procedure HookAPI;

var

DLLModule: THandle;

dwSize: cardinal;

begin

ProcessHandle := GetCurrentProcess;

DLLModule := LoadLibrary('ws2_32.dll');

AddSend := GetProcAddress(DLLModule, 'send'); //取得API地址

AddRecv := GetProcAddress(DLLModule, 'recv');

JmpCode.JmpCode := $B8;

JmpCode.MovEAX[0] := $FF;

JmpCode.MovEAX[1] := $E0;

JmpCode.MovEAX[2] := 0;

ReadProcessMemory(ProcessHandle, AddSend, @OldProc[0], 8, dwSize);

JmpCode.Address := @MySend;

WriteProcessMemory(ProcessHandle, AddSend, @JmpCode, 8, dwSize); //修改Send入口

ReadProcessMemory(ProcessHandle, AddRecv, @OldProc[1], 8, dwSize);

JmpCode.Address := @MyRecv;

WriteProcessMemory(ProcessHandle, AddRecv, @JmpCode, 8, dwSize); //修改Recv入口

OldSend := AddSend;

OldRecv := AddRecv;

end;

{------------------------------------}

{过程功能:取消HOOKAPI

{过程参数:无

{------------------------------------}

procedure UnHookAPI;

var

dwSize: Cardinal;

begin

WriteProcessMemory(ProcessHandle, AddSend, @OldProc[0], 8, dwSize);

WriteProcessMemory(ProcessHandle, AddRecv, @OldProc[1], 8, dwSize);

end;

end.

测试代码

procedure TForm1.Button1Click(Sender: TObject);

var

  MOduleHandle:THandle;

  TmpWndHandle:THandle;

begin

  TmpWndHandle:=0;

  //TmpWndHandle:=FindWindow('IEFrame', nil);

  TmpWndHandle:=FindWindowA(nil,'《风云online》');

 

  if not IsWindow(TmpWndHandle) then

  begin

    MessageBox(Self.Handle,'没有找到窗口','!!',MB_OK);

    Exit;

  end;

  MOduleHandle:=LoadLibrary('HOOK.dll');

  @InstallHook:=GetProcAddress(MOduleHandle,'InstallHook');

  @UnHook:=GetProcAddress(MOduleHandle,'UnHook');

  if InstallHook(FindWindowA(nil,'《风云online》')) then

  ShowMessage('Hook OK');

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

UnHook;

end;

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