c++ 端口扫描程序实现案例

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// PortScanf.cpp : 定义控制台应用程序的入口点。

//

#define WIN32_LEAN_AND_MEAN

#include "stdafx.h"

#include <WinSock2.h>

#pragma comment(lib, "Ws2_32")

intscant(char*Ip,intStartPort,intEndPort)

{

WSADATA wsa;

SOCKET s;

structsockaddr_in server;

intCurrPort;//当前端口

intret;

WSAStartup(MAKEWORD(2, 2), &wsa);//使用winsock函数之前，必须用WSAStartup函数来装入并初始化动态连接库

server.sin_family = AF_INET;//指定地址格式，在winsock中只能使用AF_INET

server.sin_addr.s_addr = inet_addr(Ip);//指定被扫描的IP地址

for(CurrPort = StartPort; CurrPort <= EndPort; CurrPort++)

{

s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

server.sin_port = htons(CurrPort);//指定被扫描IP地址的端口号

ret = connect(s, (structsockaddr *)&server,sizeof(server));//连接

if(0 == ret)//判断连接是否成功

{

printf("%s:%d Success O(∩_∩)O~~\n", Ip, CurrPort);

closesocket(s);

}

else{

printf("%s:%d Failed\n", Ip, CurrPort);

}

}

printf("Cost time:%f second\n", CostTime);//输出扫描过程中耗费的时间

WSACleanup();//释放动态连接库并释放被创建的套接字

return1;

}

intmain()

{

scant("127.0.0.1", 75, 100);

return0;

}

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typedefstruct_tagValue

{

intstart;

intend;

}PortNums;

void_cdecl beginThreadFunc1(LPVOIDlpParam) {

PortNums *pnInt = (PortNums*)lpParam;

scan("127.0.0.1", pnInt->start, pnInt->end);

}

inta()

{

PortNums m1;

m1.start = 70;

m1.end = 500;

PortNums m2;

m2.start = 501;

m2.end = 1000;

_beginthread(beginThreadFunc1, 0, &m1);

_beginthread(beginThreadFunc1, 0, &m2);

getchar();

return0;

}