如何截取网络游戏封包？500分求解(100分)

怎样用winsocket2.0去截取和发送封包呢，看了CSDN上有篇讲这个的，不过只写了HOOK，没有写怎样取得监听列表，winpcap好像也不是太有效。如果有好的答案，另开贴结500分。

你说那些办法都是有效的，只不过你不会用而已。

是啊，不会用才来求各位大富翁呀，这方面好少资料啊.有源码发到我邮箱www.delphi.com@163.com

那些DEMO你都看过了吗？没看过或者看不懂的话发你代码一样是没用的。

给你发了个Demo，我这边测试没问题，你看看吧

谢谢无欲则刚。。白兄说得也是。我看看先

看了无欲则刚的demo，只是实现了监听功能，而且还不能得到是哪个应用程序发送和接收的，更不能拦截封包修改后再发送了，另外就是用这个demo得到的数据的第一位是14,而用WPE得到的第一位会是C1，其他的就相同了。
还是谢谢无欲兄，学习中。
demo下载地址(cap_ip2 sniffer.zip)：http://www.126disk.com/?delphi
大富翁们，给小弟指条明路八。[]

个人以为winpcap比winsocket2.0好用。如果需要我可以把自己做的代码给你

需要呀，发到我邮箱上吧www.delphi.com@163.com ，我研究研究，还有winpcap的工具包，我找呀找不到最新的。

做网络一般用VC，VC例子也多

直接WPE PRO就行了，写它干嘛。能写那么专业的吗。

“而且还不能得到是哪个应用程序发送和接收的”
这个应用我没做过，你可以参考一些外挂程序。
说说我的思路，可以扫描当前被占用的端口和通信的IP，查询出他们的宿主程序，然后在收包中提取IP和端口号，匹配一下
“更不能拦截封包修改后再发送了”
这个就要你自己写代码了，自己封包发送

反正是听，以前的例子:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ScktComp, StdCtrls, Spin, ExtCtrls, Buttons, ComCtrls, Menus;
type
TFormMain = class(TForm)
ServerSocket1: TServerSocket;
Panel1: TPanel;
ComboBox1: TComboBox;
Label1: TLabel;
Panel2: TPanel;
Memo1: TMemo;
BitBtn1: TBitBtn;
StatusBar1: TStatusBar;
SpeedButton1: TSpeedButton;
SpeedButton2: TSpeedButton;
SaveDialog1: TSaveDialog;
CheckBox1: TCheckBox;
CheckBox2: TCheckBox;
procedure ServerSocket1ClientRead(Sender: TObject;
Socket: TCustomWinSocket);
procedure ServerSocket1ClientConnect(Sender: TObject;
Socket: TCustomWinSocket);
procedure BitBtn1Click(Sender: TObject);
procedure AppException(Sender: TObject;
E: Exception) ;
procedure FormCreate(Sender: TObject);
procedure ComboBox1Change(Sender: TObject);
procedure FormResize(Sender: TObject);
procedure SpeedButton1Click(Sender: TObject);
procedure LSpinEdit1Change(Sender: TObject);
procedure FormActivate(Sender: TObject);
procedure ServerSocket1ClientDisconnect(Sender: TObject;
Socket: TCustomWinSocket);
procedure ServerSocket1ThreadEnd(Sender: TObject;
Thread: TServerClientThread);
procedure SpeedButton2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
FormMain: TFormMain;
implementation
{$R *.DFM}
procedure TFormMain.AppException(Sender: TObject;
E: Exception );
begin
//
end;

procedure TFormMain.ServerSocket1ClientRead(Sender: TObject;
Socket: TCustomWinSocket);
var
S,Z:String;
i:integer;
begin
S := Socket.ReceiveText;
Memo1.Lines.Add( Socket.RemoteAddress +' DATA: '+ S );
if CheckBox1.Checked then
begin
Z := '';
for i:=1 to length(S)do
begin
Z := Z + inttohex(ord(S),2)+ ' ';
end;
Memo1.Lines.Add( '> '+Socket.RemoteAddress +' HEX: '+Z );
end;

if CheckBox2.Checked then
begin
Z := '';
for i:=1 to length(S)do
begin
Z := Z + inttostr(ord(S))+ ' ';
end;
Memo1.Lines.Add( '> '+Socket.RemoteAddress +' DEC: '+Z );
end;
end;

procedure TFormMain.ServerSocket1ClientConnect(Sender: TObject;
Socket: TCustomWinSocket);
begin
Memo1.Lines.Add( Socket.RemoteAddress+' connected.' );
end;

procedure TFormMain.BitBtn1Click(Sender: TObject);
begin
if not ServerSocket1.Active then
begin
ServerSocket1.Port := LSpinEdit1.Value;
ServerSocket1.Open;
BitBtn1.Caption := 'STOP';
Caption := Application.Title + ' ['+inttostr(LSpinEdit1.Value)+']';
end else
begin
ServerSocket1.Close;
BitBtn1.Caption := 'START';
Caption := Application.Title + ' [inactive]';
end;
end;

procedure TFormMain.FormCreate(Sender: TObject);
begin
Caption := Application.Title + ' [inactive]';
Application.OnException := AppException;
end;

procedure TFormMain.ComboBox1Change(Sender: TObject);
begin
case ComboBox1.ItemIndex of
0: LSpinEdit1.Value := 7;
1: LSpinEdit1.Value := 17;
2: LSpinEdit1.Value := 21;
3: LSpinEdit1.Value := 23;
4: LSpinEdit1.Value := 25;
5: LSpinEdit1.Value := 70;
6: LSpinEdit1.Value := 79;
7: LSpinEdit1.Value := 80;
8: LSpinEdit1.Value := 110;
9: LSpinEdit1.Value := 113;
10: LSpinEdit1.Value := 139;
end;
end;

procedure TFormMain.FormResize(Sender: TObject);
begin
if Height<320 then
Height := 320;
if Width<450 then
Width := 450;
end;

procedure TFormMain.SpeedButton1Click(Sender: TObject);
begin
Memo1.Text := '';
end;

procedure TFormMain.LSpinEdit1Change(Sender: TObject);
begin
case LSpinEdit1.Value of
7: ComboBox1.ItemIndex := 0;
17: ComboBox1.ItemIndex := 1;
21: ComboBox1.ItemIndex := 2;
23: ComboBox1.ItemIndex := 3;
25: ComboBox1.ItemIndex := 4;
70: ComboBox1.ItemIndex := 5;
79: ComboBox1.ItemIndex := 6;
80: ComboBox1.ItemIndex := 7;
110: ComboBox1.ItemIndex := 8;
113: ComboBox1.ItemIndex := 9;
139: ComboBox1.ItemIndex := 10;
else
ComboBox1.ItemIndex := 11;
end;
end;

procedure TFormMain.FormActivate(Sender: TObject);
begin
LSpinEdit1Change( Sender );
end;

procedure TFormMain.ServerSocket1ClientDisconnect(Sender: TObject;
Socket: TCustomWinSocket);
begin
Memo1.Lines.Add( Socket.RemoteAddress+' disconnected.' );
end;

procedure TFormMain.ServerSocket1ThreadEnd(Sender: TObject;
Thread: TServerClientThread);
begin
Memo1.Lines.Add( ServerSocket1.Socket.RemoteAddress+' disconnected.' );
end;

procedure TFormMain.SpeedButton2Click(Sender: TObject);
begin
if SaveDialog1.Execute then
begin
Memo1.Lines.SaveToFile( SaveDialog1.FileName );
end;
end;

end.

如果感觉不行,那就用这个例子:
unit cap_main;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
cap_ip, StdCtrls, ExtCtrls, Grids, ComCtrls, Buttons, Menus;
type
Tmy_data=record
buf:array of char;
end;

type
TForm1 = class(TForm)
BitBtn1: TBitBtn;
BitBtn2: TBitBtn;
BitBtn3: TBitBtn;
BitBtn4: TBitBtn;
PageControl1: TPageControl;
TabSheet1: TTabSheet;
TabSheet2: TTabSheet;
StringGrid1: TStringGrid;
Splitter1: TSplitter;
Edit2: TEdit;
Label1: TLabel;
Panel1: TPanel;
Memo1: TMemo;
Splitter2: TSplitter;
Memo2: TMemo;
BitBtn5: TBitBtn;
Label2: TLabel;
Edit1: TEdit;
ComboBox1: TComboBox;
Label7: TLabel;
ComboBox2: TComboBox;
Label8: TLabel;
BitBtn6: TBitBtn;
procedure FormCreate(Sender: TObject);
procedure cap_ip1Cap(ip, proto, sourceIP, destIP, SourcePort,
DestPort: String;
header: PChar;
header_size: Integer;
data: PChar;
data_size: Integer);
procedure BitBtn1Click(Sender: TObject);
procedure BitBtn2Click(Sender: TObject);
procedure BitBtn3Click(Sender: TObject);
procedure StringGrid1Click(Sender: TObject);
procedure BitBtn5Click(Sender: TObject);
procedure BitBtn6Click(Sender: TObject);
procedure BitBtn4Click(Sender: TObject);
procedure FormClose(Sender: TObject;
var Action: TCloseAction);
private
{ Private declarations }
public
function check_filter(proto, sourceIP, destIP, SourcePort,DestPort: String;data: PChar;data_size: Integer):boolean;
end;

var
Form1: TForm1;
buf_list:array of Tmy_data;
filter_str:string;
cap_ip1:Tcap_ip;
implementation
{$R *.DFM}
procedure TForm1.FormCreate(Sender: TObject);
begin
with StringGrid1.Rows[0]do
begin
Add('协议类型');
Add('源地址');
Add('源端口');
Add('目的地址');
Add('目的端口');
Add('数据大小');
Add('数据内容');
end;
setlength(buf_list,strtoint(edit2.text));
cap_ip1:=Tcap_ip.Create(self);
cap_ip1.OnCap:=cap_ip1Cap;
end;

function TForm1.check_filter(proto, sourceIP, destIP, SourcePort,DestPort: String;data: PChar;data_size: Integer):boolean;
var
i:integer;
temp_str:string;
begin
result:=true;
if filter_str='' then
begin
result:=false;
exit;
end;
if (filter_str='排除协议'+proto) then
exit;
if (filter_str='排除源地址'+sourceIP) then
exit;
if (filter_str='排除源端口'+SourcePort) then
exit;
if (filter_str='排除目的地址'+destIP) then
exit;
if (filter_str='排除目的端口'+DestPort) then
exit;
if (ComboBox2.text='包含') and (ComboBox1.Text<>'内容') then
begin
if (filter_str='包含协议'+proto) then
begin
result:=false;exit;
end;
if (filter_str='包含源地址'+sourceIP) then
begin
result:=false;exit;
end;
if (filter_str='包含源端口'+SourcePort) then
begin
result:=false;exit;
end;
if (filter_str='包含目的地址'+destIP) then
begin
result:=false;exit;
end;
if (filter_str='包含目的端口'+DestPort) then
begin
result:=false;exit;
end;
result:=true;exit;
end;

if (filter_str<>'包含内容') then
begin
result:=false;exit;
end;
setlength(buf_list[StringGrid1.RowCount-2].buf,data_size);
copymemory(buf_list[StringGrid1.RowCount-2].buf,data,data_size);
temp_str:='';
for i:=0 to data_size-1do
temp_str:=temp_str+buf_list[StringGrid1.RowCount-2].buf;
temp_str:=AnsiLowerCase(temp_str);
if (filter_str='包含内容') then
begin
if pos(AnsiLowerCase(edit1.text),temp_str)>0 then
begin
result:=false;
exit;
end else
begin
result:=true;
exit;
end;
end else
if (filter_str='排除内容') then
begin
if pos(AnsiLowerCase(edit1.text),temp_str)>0 then
begin
result:=true;
exit;
end else
begin
result:=false;
exit;
end;
end;
result:=false;
end;

procedure TForm1.cap_ip1Cap(ip, proto, sourceIP, destIP, SourcePort,
DestPort: String;
header: PChar;
header_size: Integer;
data: PChar;
data_size: Integer);
begin
if check_filter(proto,sourceIP, destIP, SourcePort,DestPort, data,data_size) then
exit;
with StringGrid1do
begin
Cells[0,StringGrid1.RowCount-1]:=proto;
Cells[1,StringGrid1.RowCount-1]:=sourceIP;
Cells[2,StringGrid1.RowCount-1]:=SourcePort;
Cells[3,StringGrid1.RowCount-1]:=destIP;
Cells[4,StringGrid1.RowCount-1]:=DestPort;
Cells[5,StringGrid1.RowCount-1]:=inttostr(data_size);
Cells[6,StringGrid1.RowCount-1]:=data;
end;
setlength(buf_list[StringGrid1.RowCount-2].buf,data_size);
copymemory(buf_list[StringGrid1.RowCount-2].buf,data,data_size);
if (StringGrid1.RowCount>strtoint(edit2.text)) then
StringGrid1.RowCount:=2
else
begin
StringGrid1.RowCount:=StringGrid1.RowCount+1;
StringGrid1.Rows[StringGrid1.RowCount].Clear;
end;

stringgrid1.toprow:=StringGrid1.RowCount- StringGrid1.VisibleRowCount;
end;

procedure TForm1.BitBtn1Click(Sender: TObject);
begin
cap_ip1.StartCap;
end;

procedure TForm1.BitBtn2Click(Sender: TObject);
begin
cap_ip1.pause;
if cap_ip1.Fpause then
BitBtn2.Caption:='继续捕捉'
else
BitBtn2.Caption:='暂停捕捉';
end;

procedure TForm1.BitBtn3Click(Sender: TObject);
begin
cap_ip1.StopCap;
end;

procedure TForm1.StringGrid1Click(Sender: TObject);
var text_str,hex_str,all_str:string;
i:integer;
no: Integer;
begin
memo1.lines.Clear;
memo2.lines.Clear;
text_str:='';hex_str:='';all_str:='';
i:=0;
while i<= high(buf_list[stringgrid1.Selection.Top-1].buf)do
begin
no:=ord(buf_list[stringgrid1.Selection.Top-1].buf);
hex_str:=hex_str+format('%0.2x',[no])+' ';
if no<20 then
begin
text_str:=text_str+'.';
all_str:=all_str+'.';
end else
begin
text_str:=text_str+buf_list[stringgrid1.Selection.Top-1].buf;
all_str:=all_str+buf_list[stringgrid1.Selection.Top-1].buf;
end;

if ((i mod 8)=7) then
begin
memo1.lines.add(hex_str+' | '+text_str);
text_str:='';hex_str:='';
end;
inc(i);
end;
if hex_str<>'' then
memo1.lines.add(hex_str+format('%'+inttostr(24-length(hex_str))+'s',[' '])+' | '+text_str);
memo2.lines.Add(all_str);
end;

procedure TForm1.BitBtn5Click(Sender: TObject);
begin
StringGrid1.RowCount:=2;
StringGrid1.Rows[1].Clear;
end;

procedure TForm1.BitBtn6Click(Sender: TObject);
begin
filter_str:='';
if (ComboBox2.text='') or (ComboBox1.Text='') or (edit1.Text='') then
showmessage('内容不全!') else
if ComboBox1.Text='内容' then
filter_str:=self.ComboBox2.text+self.ComboBox1.Text
else
filter_str:=self.ComboBox2.text+self.ComboBox1.Text+AnsiUpperCase(edit1.Text);
end;

procedure TForm1.BitBtn4Click(Sender: TObject);
begin
close;
end;

procedure TForm1.FormClose(Sender: TObject;
var Action: TCloseAction);
begin
cap_ip1.Free;
end;

end.

接上面的:
unit cap_ip;
interface
uses
Windows, Messages,Classes,winsock,sysutils;
const
WM_CapIp = WM_USER + 200;
STATUS_FAILED =$FFFF; //定义异常出错代码
MAX_PACK_LEN =65535; //接收的最大IP报文
MAX_ADDR_LEN =16; //点分十进制地址的最大长度
MAX_PROTO_TEXT_LEN =16; //子协议名称(如"TCP")最大长度
MAX_PROTO_NUM =12; //子协议数量
MAX_HOSTNAME_LAN =255; //最大主机名长度
CMD_PARAM_HELP =true;
IOC_IN =$80000000;
IOC_VENDOR =$18000000;
IOC_out =$40000000;
SIO_RCVALL =IOC_IN or IOC_VENDOR or 1;// or IOC_out;
SIO_RCVALL_MCAST =IOC_IN or IOC_VENDOR or 2;
SIO_RCVALL_IGMPMCAST =IOC_IN or IOC_VENDOR or 3;
SIO_KEEPALIVE_VALS =IOC_IN or IOC_VENDOR or 4;
SIO_ABSORB_RTRALERT =IOC_IN or IOC_VENDOR or 5;
SIO_UCAST_IF =IOC_IN or IOC_VENDOR or 6;
SIO_LIMIT_BROADCASTS =IOC_IN or IOC_VENDOR or 7;
SIO_INDEX_BIND =IOC_IN or IOC_VENDOR or 8;
SIO_INDEX_MCASTIF =IOC_IN or IOC_VENDOR or 9;
SIO_INDEX_ADD_MCAST =IOC_IN or IOC_VENDOR or 10;
SIO_INDEX_DEL_MCAST =IOC_IN or IOC_VENDOR or 11;

type tcp_keepalive=record
onoff:Longword;
keepalivetime:Longword;
keepaliveinterval:Longword;
end;

// New WSAIoctl Options
//IP头
type
_iphdr=record
h_lenver :byte; //4位首部长度+4位IP版本号
tos :char; //8位服务类型TOS
total_len :char; //16位总长度（字节）
ident :word; //16位标识
frag_and_flags :word; //3位标志位
ttl :byte; //8位生存时间 TTL
proto :byte; //8位协议 (TCP, UDP 或其他)
checksum :word; //16位IP首部校验和
sourceIP :Longword; //32位源IP地址
destIP :Longword; //32位目的IP地址
end;
IP_HEADER=_iphdr;
type _tcphdr=record //定义TCP首部
TCP_Sport :word; //16位源端口
TCP_Dport :word; //16位目的端口
th_seq :longword; //32位序列号
th_ack :longword; //32位确认号
th_lenres :byte;
//4位首部长度/6位保留字
th_flag :char; //6位标志位
th_win :word; //16位窗口大小
th_sum :word; //16位校验和
th_urp :word; //16位紧急数据偏移量
end;
TCP_HEADER=_tcphdr;
type _udphdr=record //定义UDP首部
uh_sport :word; //16位源端口
uh_dport :word; //16位目的端口
uh_len :word; //16位长度
uh_sum :word; //16位校验和
end;
UDP_HEADER=_udphdr;
type _icmphdr=record //定义ICMP首部
i_type :byte; //8位类型
i_code :byte; //8位代码
i_cksum :word; //16位校验和
i_id :word; //识别号（一般用进程号作为识别号）
// i_seq :word; //报文序列号
timestamp :word; //时间戳
end;
ICMP_HEADER=_icmphdr;
type _protomap=record //定义子协议映射表
ProtoNum :integer;
ProtoText :array[0..MAX_PROTO_TEXT_LEN] of char;
end;
TPROTOMAP=_protomap;
type
ESocketException = class(Exception);
TWSAStartup = function (wVersionRequired: word;
var WSData: TWSAData): Integer;
stdcall;
TOpenSocket = function (af, Struct, protocol: Integer): TSocket;
stdcall;
TInet_addr = function (cp: PChar): u_long;
stdcall;
Thtons = function (hostshort: u_short): u_short;
stdcall;
TConnect = function (s: TSocket;
var name: TSockAddr;
namelen: Integer): Integer;
stdcall;
TWSAIoctl = function (s: TSocket;
cmd: DWORD;lpInBuffer: PCHAR;
dwInBufferLenWORD;lpOutBuffer: PCHAR;
dwOutBufferLen: DWORD;
lpdwOutBytesReturned: LPDWORD;lpOverLapped: POINTER;
lpOverLappedRoutine: POINTER): Integer;
stdcall;
TCloseSocket = function (s: TSocket): Integer;
stdcall;
Tsend = function( s:TSOCKET;
bufchar;Len:integer;flags:integer):Integer;stdcall;
Trecv = function( s:TSOCKET;
var buf;Len:integer;flags:integer):Integer;stdcall;
TWSAAsyncSelect =function (s: TSocket;
HWindow: HWND;
wMsg: u_int;
lEvent: Longint): Integer;
stdcall;
TWSACleanup =function():integer;stdcall;
TOnCap = procedure(ip,proto,sourceIP,destIP,SourcePort,DestPort: string;
headerchar;header_size:integer;datachar;data_size:integer) of object;
TOnError = procedure(Error : string) of object;
Tcap_ip = class(TComponent)
private
Fhand_dll :HModule;
// Handle for mpr.dll
FWindowHandle : HWND;
FOnCap :TOnCap;
//捕捉数据的事件
FOnError :TOnError;
//发生错误的事件
Fsocket :array of Tsocket;
FActiveIP :array of string;//存放可用的IP
FWSAStartup : TWSAStartup;
FOpenSocket : TOpenSocket;
FInet_addr : TInet_addr;
Fhtons : Thtons;
FConnect : TConnect;
FCloseSocket : TCloseSocket;
Fsend :Tsend;
FWSAIoctl :TWSAIoctl;
Frecv :Trecv;
FWSACleanup :TWSACleanup;
FWSAAsyncSelect :TWSAAsyncSelect;
protected
procedure WndProc(var MsgRec: TMessage);
function DecodeIpPack(ip:string;bufchar;iBufSize:integer):integer;
//IP解包函数
// function DecodeTcpPack(TcpBufchar;iBufSize:integer):integer;
//TCP解包函数
//function DecodeUdpPack(pchar;i:integer):integer; //UDP解包函数
//function DecodeIcmpPack(pchar;i:integer):integer;
//ICMP解包函数
function CheckProtocol(iProtocol:integer):string; //协议检查
procedure cap_ip(socket_no:integer);
procedure get_ActiveIP;
//得当前的IP列表
procedure set_socket_state;
//设置网卡状态
function CheckSockError(iErrorCode:integer):boolean;
//出错处理函数
public
Fpause :boolean;//暂停
Finitsocket :boolean;//是否已初始化
constructor Create(Owner : TComponent);
override;
destructor Destroy;
override;
function init_socket:boolean;//初始化
procedure StartCap;//开始捕捉
procedure pause;
//暂停
procedure StopCap;//结束捕捉
property Handle : HWND read FWindowHandle;
published
property OnCap : TOnCap read FOnCap write FOnCap;
property OnError : TOnError read FOnError write FOnError;
end;

procedure Register;
implementation
function XSocketWindowProc(ahWnd : HWND;auMsg : Integer;awParam : WPARAM;
alParam : LPARAM): Integer;
stdcall;
var
Obj : Tcap_ip;
MsgRec : TMessage;
begin
{ At window creation ask windows to store a pointer to our object }
Obj := Tcap_ip(GetWindowLong(ahWnd, 0));
{ If the pointer is not assigned, just call the default procedure }
if not Assigned(Obj) then
Result := DefWindowProc(ahWnd, auMsg, awParam, alParam)
else
begin
{ Delphi use a TMessage type to pass paramter to his own kind of }
{ windows procedure. So we aredo
ing the same... }
MsgRec.Msg := auMsg;
MsgRec.wParam := awParam;
MsgRec.lParam := alParam;
Obj.WndProc(MsgRec);
Result := MsgRec.Result;
end;
end;

var
XSocketWindowClass: TWndClass = (
style : 0;
lpfnWndProc : @XSocketWindowProc;
cbClsExtra : 0;
cbWndExtra : SizeOf(Pointer);
hInstance : 0;
hIcon : 0;
hCursor : 0;
hbrBackground : 0;
lpszMenuName : nil;
lpszClassName : 'TCap_ip');

function XSocketAllocateHWnd(Obj : TObject): HWND;
var
TempClass : TWndClass;
ClassRegistered : Boolean;
begin
{ Check if the window class is already registered }
XSocketWindowClass.hInstance := HInstance;
ClassRegistered := GetClassInfo(HInstance,
XSocketWindowClass.lpszClassName,
TempClass);
if not ClassRegistered then
begin
{ Not yet registered,do
it right now }
Result := Windows.RegisterClass(XSocketWindowClass);
if Result = 0 then
Exit;
end;

{ Now create a new window }
Result := CreateWindowEx(WS_EX_TOOLWINDOW,
XSocketWindowClass.lpszClassName,
'', { Window name }
WS_POPUP, { Window Style }
0, 0, { X, Y }
0, 0, { Width, Height }
0, { hWndParent }
0, { hMenu }
HInstance, { hInstance }
nil);
{ CreateParam }
{ if successfull, the ask windows to store the object reference }
{ into the reserved byte (see RegisterClass) }
if (Result <> 0) and Assigned(Obj) then
SetWindowLong(Result, 0, Integer(Obj));
end;

{* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *}
{ Free the window handle }
procedure XSocketDeallocateHWnd(Wnd: HWND);
begin
DestroyWindow(Wnd);
end;

//当前机的所有IP地址
procedure Tcap_ip.get_ActiveIP;
type
TaPInAddr = Array[0..20] of PInAddr;
PaPInAddr = ^TaPInAddr;
var
phe: PHostEnt;
pptr: PaPInAddr;
Buffer: Array[0..63] of Char;
I: Integer;
begin
setlength(FActiveIP,20);
GetHostName(Buffer, SizeOf(Buffer));
phe := GetHostByName(buffer);
if phe = nil then
begin
setlength(FActiveIP,0);
if Assigned(FOnError) then
FOnError('没有找到可绑定的IP!');
exit;
end;
pPtr := PaPInAddr(phe^.h_addr_list);
I := 0;
while (pPtr^ <> nil) and (i<20)do
begin
FActiveIP:=inet_ntoa(pptr^^);
Inc(I);
end;
setlength(FActiveIP,i);
end;

procedure Tcap_ip.set_socket_state;
var
i,iErrorCode:integer;
sa: tSockAddrIn;
dwBufferLen:array[0..10]of DWORD;
dwBufferInLenWORD;
dwBytesReturnedWORD;
begin
if high(FActiveIP)=-1 then
exit;
setlength(Fsocket,high(FActiveIP)+1);
for i:=0 to high(FActiveIP)do
begin
Fsocket:= socket(AF_INET , SOCK_RAW , IPPROTO_IP);
sa.sin_family:= AF_INET;
sa.sin_port := htons(i);
sa.sin_addr.S_addr:=Inet_addr(pchar(FActiveIP));
iErrorCode := bind(Fsocket,sa, sizeof(sa));
CheckSockError(iErrorCode);
dwBufferInLen := 1 ;
dwBytesReturned:=0;
//设置Fsocket为SIO_RCVALL接收所有的IP包
iErrorCode:=FWSAIoctl(Fsocket, SIO_RCVALL,@dwBufferInLen, sizeof(dwBufferInLen),
@dwBufferLen, sizeof(dwBufferLen),@dwBytesReturned ,nil ,nil);
CheckSockError(iErrorCode);
iErrorCode:=WSAAsyncSelect(Fsocket,FWindowHandle,WM_CapIp+i,FD_READ or FD_CLOSE);
CheckSockError(iErrorCode);
end;
end;

//读IP数据
procedure Tcap_ip.cap_ip(socket_no:integer);
var
iErrorCode:integer;
RecvBuf:array[0..MAX_PACK_LEN] of char;
begin
fillchar(RecvBuf,sizeof(RecvBuf),0);
iErrorCode := frecv(Fsocket[socket_no], RecvBuf, sizeof(RecvBuf), 0);
CheckSockError(iErrorCode);
if not Fpause then
begin
iErrorCode := DecodeIpPack(FActiveIP[socket_no],RecvBuf, iErrorCode);
CheckSockError(iErrorCode);
end;
end;

//协议识别程序
function Tcap_ip.CheckProtocol(iProtocol:integer):string;
var
i:integer;
begin
result:='';
case iProtocol of
IPPROTO_IP :result:='IP';
IPPROTO_ICMP :result:='ICMP';
IPPROTO_IGMP :result:='IGMP';
IPPROTO_GGP :result:='GGP';
IPPROTO_TCP :result:='TCP';
IPPROTO_PUP :result:='PUP';
IPPROTO_UDP :result:='UDP';
IPPROTO_IDP :result:='IDP';
IPPROTO_ND :result:='NP';
IPPROTO_RAW :result:='RAW';
IPPROTO_MAX :result:='MAX';
else
result:='';
end;
end;

//IP解包程序
function Tcap_ip.DecodeIpPack(ip:string;bufchar;iBufSize:integer):integer;
var
SourcePort,DestPort:word;
iProtocol, iTTL:integer;
szProtocol :array[0..MAX_PROTO_TEXT_LEN] of char;
szSourceIP :array[0..MAX_ADDR_LEN] of char;
szDestIP :array[0..MAX_ADDR_LEN] of char;
pIpheader:IP_HEADER;
pTcpHeader:TCP_HEADER;
pUdpHeader:UDP_HEADER;
pIcmpHeader:ICMP_HEADER;
saSource, saDest:TSockAddrIn;
iIphLen,data_size:integer;
TcpHeaderLen:integer;
TcpDatachar;
begin
result:=0;
CopyMemory(@pIpheader,buf,sizeof(pIpheader));
//协议甄别
iProtocol := pIpheader.proto;
StrLCopy(szProtocol, pchar(CheckProtocol(iProtocol)),15);
//源地址
saSource.sin_addr.s_addr := pIpheader.sourceIP;
strlcopy(szSourceIP, inet_ntoa(saSource.sin_addr), MAX_ADDR_LEN);
//目的地址
saDest.sin_addr.s_addr := pIpheader.destIP;
strLcopy(szDestIP, inet_ntoa(saDest.sin_addr), MAX_ADDR_LEN);
iTTL := pIpheader.ttl;
//计算IP首部的长度
iIphLen :=sizeof(pIpheader);
//根据协议类型分别调用相应的函数
case iProtocol of
IPPROTO_TCP :begin
CopyMemory(@pTcpHeader,buf+iIphLen,sizeof(pTcpHeader));
SourcePort := ntohs(pTcpHeader.TCP_Sport);//源端口
DestPort := ntohs(pTcpHeader.TCP_Dport);
//目的端口
TcpData:=buf+iIphLen+sizeof(pTcpHeader);
data_size:=iBufSize-iIphLen-sizeof(pTcpHeader);
end;
IPPROTO_UDP :begin
CopyMemory(@pUdpHeader,buf+iIphLen,sizeof(pUdpHeader));
SourcePort := ntohs(pUdpHeader.uh_sport);//源端口
DestPort := ntohs(pUdpHeader.uh_dport);
//目的端口
TcpData:=buf+iIphLen+sizeof(pUdpHeader);
data_size:=iBufSize-iIphLen-sizeof(pUdpHeader);
end;
IPPROTO_ICMP :begin
CopyMemory(@pIcmpHeader,buf+iIphLen,sizeof(pIcmpHeader));
SourcePort := pIcmpHeader.i_type;//类型
DestPort := pIcmpHeader.i_code;
//代码
TcpData:=buf+iIphLen+sizeof(pIcmpHeader);
data_size:=iBufSize-iIphLen-sizeof(pIcmpHeader);
end;
else
begin
SourcePort :=0;
DestPort := 0;
//代码
TcpData:=buf+iIphLen;
data_size:=iBufSize-iIphLen;
end;
end;

if Assigned(FOnCap) then
FOnCap(ip,szProtocol,szSourceIP,szDestIP,inttostr(SourcePort),inttostr(DestPort)
,buf,iBufSize-data_size,TcpData,data_size);
end;

//SOCK错误处理程序
function Tcap_ip.CheckSockError(iErrorCode:integer):boolean; //出错处理函数
begin
if(iErrorCode=SOCKET_ERROR) then
begin
if Assigned(FOnError) then
FOnError(inttostr(GetLastError)+SysErrorMessage(GetLastError));
result:=true;
end else
result:=false;
end;

procedure Tcap_ip.WndProc(var MsgRec: TMessage);
begin
with MsgRecdo
if (Msg >=WM_CapIp) and (Msg <= WM_CapIp+high(FActiveIP)) then
cap_ip(msg-WM_CapIp)
else
Result := DefWindowProc(Handle, Msg, wParam, lParam);
end;

constructor Tcap_ip.Create(Owner : TComponent);
begin
Inherited Create(Owner);
Fpause:=false;
Finitsocket:=false;
setlength(Fsocket,0);
FWindowHandle := XSocketAllocateHWnd(Self);
end;

{* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *}
destructor Tcap_ip.Destroy;
var i:integer;
begin
for i:=0 to high(Fsocket)do
FCloseSocket(Fsocket);
if self.Finitsocket then
begin
FWSACleanup;
if Fhand_dll <> 0 then
FreeLibrary(Fhand_dll);
end;

inherited Destroy;
end;

function Tcap_ip.init_socket:boolean;//初始化
var
GInitData:TWSAData;
begin
result:=true;
IF Finitsocket then
exit;
Fhand_dll := LoadLibrary('ws2_32.dll');
if Fhand_dll = 0 then
begin
raise ESocketException.Create('Unable to register ws2_32.dll');
result:=false;
exit;
end;
@FWSAStartup := GetProcAddress(Fhand_dll, 'WSAStartup');
@FOpenSocket := GetProcAddress(Fhand_dll, 'socket');
@FInet_addr := GetProcAddress(Fhand_dll, 'inet_addr');
@Fhtons := GetProcAddress(Fhand_dll, 'htons');
@FConnect := GetProcAddress(Fhand_dll, 'connect');
@FCloseSocket := GetProcAddress(Fhand_dll, 'closesocket');
@Fsend := GetProcAddress(Fhand_dll, 'send');
@FWSAIoctl := GetProcAddress(Fhand_dll, 'WSAIoctl');
@Frecv := GetProcAddress(Fhand_dll, 'recv');
@FWSACleanup := GetProcAddress(Fhand_dll, 'WSACleanup');
@FWSAAsyncSelect:=GetProcAddress(Fhand_dll, 'WSAAsyncSelect');
if (@FWSAStartup =nil) or(@Fhtons =nil) or (@FConnect =nil) or (@Fsend =nil) or (@FWSACleanup=nil) or
(@FOpenSocket =nil) or (@FInet_addr =nil)or (@FCloseSocket =nil) or (@recv=nil)or (@FWSAIoctl=nil)
or (@FWSAAsyncSelect=nil) then
begin
raise ESocketException.Create('加载dll函数错误!');
result:=false;
exit;
end;

if FWSAStartup($201,GInitData)<>0 then
begin
raise ESocketException.Create('初始化SOCKET2函数失败!');
result:=false;
exit;
end;
Finitsocket:=true;
end;
procedure Tcap_ip.StartCap;
begin
if not Finitsocket then
if not init_socket then
exit;
get_ActiveIP;
set_socket_state;
end;
procedure Tcap_ip.pause;
begin
if Finitsocket and (high(Fsocket)>-1) then
Fpause:=not Fpause;
end;

procedure Tcap_ip.StopCap;
var i:integer;
begin
for i:=0 to high(Fsocket)do
FCloseSocket(Fsocket);
end;

procedure Register;
begin
RegisterComponents('Standard', [Tcap_ip]);
end;

end.

反正不知道是哪个大仙写的妙着,自己慢慢去享用吧!

发包的例子,这里用的DDK,不是WINCAP,看看也有用,把那DDK中发包的函数找出来,这里找出的是一个!
nit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
dialogs,StdCtrls, ExtCtrls;
type
Tmain = class(TForm)
Button1: TButton;
Edit1: TEdit;
Edit2: TEdit;
Label1: TLabel;
Label2: TLabel;
Edit3: TEdit;
Image1: TImage;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Edit1KeyPress(Sender: TObject;
var Key: Char);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
main: Tmain;
implementation
{$R *.dfm}
const INADDR_NONE = $FFFFFFFF;
function SendARP(const DestIP: DWord;
const SrcIP: DWord;
const pMacAddr: Pointer;
const PhyAddrLen: PULONG): DWord;
stdcall;
external 'IPHLPAPI.DLL' name 'SendARP';
function inet_addr(const cp: PChar): DWord;
stdcall;
external 'WS2_32.DLL' name 'inet_addr';

procedure Tmain.Button1Click(Sender: TObject);
var
dwResult: DWord;
ulIPAddr: DWord;
ulMACAddr: array[0..5] of Byte;
ulAddrLen: ULONG;
begin
ulIPAddr := inet_addr(PChar(Edit1.Text));
edit3.Text:= IntToHex(ulIPAddr, 8);
if ulIPAddr = INADDR_NONE then
begin
// application.MessageBox('不合法IP地址','错误信息',16);
// Exit;
end;
ulAddrLen := 6;
dwResult := SendARP(ulIPAddr, 0, @ulMACAddr, @ulAddrLen);
//dwResult := SendARP(0, inet_addr(PChar('192.168.1.2')), @ulMACAddr, @ulAddrLen);
if dwResult <> 0 then
begin
//MessageDlg('发送ARP请求失败！', mtError, [mbOK], 0);
//application.MessageBox(#13+'信息提示:'+#13+#13+'　　　　发送ARP请求失败！　　　　'+#13+#13,'错误信息',16);
//Exit;
end;

edit2.text:=IntToHex(ulMACAddr[0],2)+IntToHex(ulMACAddr[1],2)+IntToHex(ulMACAddr[2],2)+IntToHex(ulMACAddr[3],2)+
IntToHex(ulMACAddr[4],2)+IntToHex(ulMACAddr[5],2);
{ ShowMessage('MAC 地址为 : ' +
IntToHex(ulMACAddr[0], 2) + ':' +
IntToHex(ulMACAddr[1], 2) + ':' +
IntToHex(ulMACAddr[2], 2) + ':' +
IntToHex(ulMACAddr[3], 2) + ':' +
IntToHex(ulMACAddr[4], 2) + ':' +
IntToHex(ulMACAddr[5], 2));
}
end;

procedure Tmain.Edit1KeyPress(Sender: TObject;
var Key: Char);
begin
edit3.Text:= IntToHex(inet_addr(PChar(Edit1.Text)), 8);
end;

procedure Tmain.Button2Click(Sender: TObject);
var
dwResult: DWord;
ulIPAddr: DWord;
ulMACAddr: array[0..5] of Byte;
ulAddrLen: ULONG;
begin
ulIPAddr:= inet_addr(PChar(Edit1.Text));
edit3.Text:= IntToHex(ulIPAddr, 8);
if ulIPAddr = INADDR_NONE then
begin
// application.MessageBox('不合法IP地址','错误信息',16);
// Exit;
end;
ulAddrLen := 6;
//dwResult := SendARP(0,ulIPAddr, @INADDR_NONE, @ulAddrLen);
//dwResult := SendARP(0, inet_addr(PChar('192.168.1.2')), @ulMACAddr, @ulAddrLen);
if dwResult <> 0 then
begin
//MessageDlg('发送ARP请求失败！', mtError, [mbOK], 0);
//application.MessageBox(#13+'信息提示:'+#13+#13+'　　　　发送ARP请求失败！　　　　'+#13+#13,'错误信息',16);
//Exit;
end;
end;

end.

看得不明白

ccxxzz你贴的就是cap_ip啦。。这个有了。。还有我找的winpcap有个pcap的，例程都找不到。

上面的就可以拉，然后怎么分析，当然要自己来了，还有某个程序发的，那你可以通过防火墙知道这个程序开放什么端口，然后只显示这个端口的数据就可以了

如果说我发的东西不行,那你是对IP协议数据报没有理解,也就是你所说的14和C4区别,14是数据,而C4是目的MAC地址数据中的第一位,IP数据报和通信数据请仔细看下CCNA中的解释吧!