端口扫描(TCP)

还待优化。。。

#include <string.h>
#include <WinSock.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")
int main(int argc, _TCHAR* argv[]) {
    int i=0;
    int portArr[]={21,23,25,53,67,68,69,79,80,99,109,110,111,113,119,135,137,139,143,161,443,554,1024,3389,4489,8080,8088};
    int portArrLen=sizeof(portArr)/sizeof(portArr[0]);
    //初始化Windows Sockets 动态
    WSADATA wsaData;
    if(WSAStartup(MAKEWORD(2,2),&wsaData)!=0) {
        printf("找不到可使用的WinSock dll!\n");
        return 1;
    }

    SOCKET sClient = NULL;//Linux 中ocket为 int类型

    struct sockaddr_in addrServ;//套接字地址结构
    addrServ.sin_family=AF_INET;
    addrServ.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");//对本机进行扫描

    for (i = 0; i<portArrLen; i++) {

        addrServ.sin_port=htons(portArr[i]);//设置端口
        sClient = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);//赋值套接字

        //连接服务器, 若connect失败则该套接字不可再用，必须关闭
        if( (connect(sClient,(struct sockaddr_in *)&addrServ,sizeof(addrServ))) ==0) {
            printf("%d pen!\n",portArr[i]);
        }else{
             printf("%d not pen!\n",portArr[i]);
        }
        //无论是否连接成功，我们都关闭套接字
        closesocket(sClient);
        sClient=NULL;
    }
    puts("扫描结束！");
    getchar();
    //终止Winsock 2 DLL (Ws2_32.dll) 的使用.
    WSACleanup();
    return 0;
}