山寨机中的战斗机！	程序优化工程师到底对IT界有没有贡献

请问通过Delphi如何实现截取远程主机的端口并读取端口数据流？

楼主erp2（天涯劍）2002-04-10 18:04:37 在 Delphi / VCL组件开发及应用提问

？？？？？？？？？
My E_mail:erp2@163.com 问题点数：100、回复次数：8Top

1 楼eiffeltower（我要追逐一个梦）回复于 2002-04-11 09:20:54 得分 5

listenTop

2 楼Liusp（夜深千帐灯）回复于 2002-04-11 10:07:45 得分 0

Liusp_sohu@sohu.comTop

3 楼duke7y（Duke）回复于 2002-04-11 10:14:42 得分 0

top
Top

4 楼wd2306（木头）回复于 2002-04-11 15:45:02 得分 0

我也不知道Top

5 楼avay（）回复于 2002-04-11 16:05:57 得分 5

除非你在远端主机上，或者在与远端主机同一网段的主机上做一个监控程序Top

6 楼xiaohedou（小河豆(充电中.18%.)）回复于 2002-04-12 13:33:31 得分 5

csdn里面应该有，你找一下就行。Top

7 楼yangkunjie（杨七郎)(dephi--c#）回复于 2002-04-12 16:31:49 得分 5

好像是用nmudpTop

8 楼erp2（天涯劍）回复于 2002-04-25 16:43:35 得分 0

csdn里面好象没有呀！Top

9 楼cg1120（代码最优化－§惟坚韧者始能遂其志§）回复于 2002-04-25 18:57:57 得分 80

给你一个异步扫描端口的代码:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls,WInSock, ExtCtrls;

const WM_SOCKET=WM_USER+1; //socket消息

type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Panel1: TPanel;
Memo1: TMemo;
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button3Click(Sender: TObject);
private
Sockhd : integer; //socket句柄
Serv_Addr : Tsockaddr;//目标地址

procedure SockEvent(var msg: Tmessage);message WM_SOCKET; //处理cocket消息
procedure DspMsg(msg : string); //显示信息
{ Private declarations }
public
{ Public declarations }
end;

Form1: TForm1;

implementation
{$R *.DFM}

function lookup_hostname(const hostname:string):longint; //把域名转化成IP地址
var
RemoteHost : PHostEnt; (* no, don't free it! *)
ip_address: longint;
begin
ip_address:=-1;
try
if hostname='' then
begin (* no host given! *)
lookup_hostname:=ip_address;
EXIT;
end
else
begin
ip_address:=Winsock.Inet_Addr(PChar(hostname)); (* try a xxx.xxx.xxx.xx first *)
if ip_address=SOCKET_ERROR then begin
RemoteHost:=Winsock.GetHostByName(PChar(hostname));
if (RemoteHost=NIL) or (RemoteHost^.h_length<=0) then
begin
lookup_hostname:=ip_address;
EXIT; (* host not found *)
end
else
ip_address:=longint(pointer(RemoteHost^.h_addr_list^)^);
end;
end;
except
ip_address:=-1;
end;
lookup_hostname:=ip_address;
end;

procedure TFOrm1.DspMsg(msg: string);
begin
memo1.Lines.Add(msg+'...');
if Memo1.Lines.Count>200 then Memo1.Lines.Delete(0);
end;

procedure TForm1.SockEvent(var msg : tmessage); //处理socket消息
begin
case msg.LParam of
FD_READ: begin //标识可以读数据,当然肯定已经链接上了
dspmsg('可以读取数据');
//do what you want do
end;

FD_WRITE: begin
dspmsg('可以发送数据');
//do what you want do
end;

FD_ERROR: begin
dspmsg('发生错误');
//如果你是客户端,则应该是连接不上,即端口没有开
end;

FD_CLOSE: Begin
dspmsg('服务器断开连接');
//对方关闭连接
end;

FD_CONNECT: begin
dspmsg('连结上服务器');
//表示对方端口开放
end;

FD_ACCEPT: begin
dspmsg('接收一个请求');
//这个消息只有服务端可能出现
end;
end;
end;

procedure TForm1.FormCreate(Sender: TObject);
var wsaData:TwsaData;
begin //启动winsock动态链接库
if WSAStartup (makeword(2,2), wsaData)<>0 then begin
messagebox(application.handle,'无法启动winsock动态连接库!','警告',MB_OK or MB_APPLMODAL or MB_ICONWARNING);
Application.Terminate;
end;
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin //关闭dll
WSACleanup;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
Sockhd := socket(AF_INET,SOCK_STREAM,0); //创建socket句柄
if Sockhd<0 then begin
messagebox(application.handle,'无法创建句柄!','警告',MB_OK or MB_APPLMODAL or MB_ICONWARNING);
exit;
end;
Serv_addr.sin_addr.s_addr:= lookup_hostname(edit1.Text); //主机名
Serv_addr.sin_family := PF_INET;
Serv_addr.sin_port := htons(23); //any port you want to connect

if WSAAsyncSelect(Sockhd,Form1.handle,WM_SOCKET,FD_ACCEPT or FD_CONNECT or FD_CLOSE or FD_READ or FD_WRITE)=SOCKET_ERROR
then begin
messagebox(application.handle,'无法创建句柄!','警告',MB_OK or MB_APPLMODAL or MB_ICONWARNING);
exit;
end; //异步socket
connect(sockhd,serv_addr,sizeof(serv_addr)); //连接,结果会在前面的处理函数处理
end;

end.Top