端口扫描(TCP)

 1 #include <string.h>
 2 #include <WinSock.h>
 3 #include <stdio.h>
 4 #pragma comment(lib,"ws2_32.lib")
 5 int main(int argc, _TCHAR* argv[]) {
 6     int i=0;
 7     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};
 8     int portArrLen=sizeof(portArr)/sizeof(portArr[0]);
 9     //初始化Windows Sockets 动态
10     WSADATA wsaData;
11     if(WSAStartup(MAKEWORD(2,2),&wsaData)!=0) {
12         printf("找不到可使用的WinSock dll!\n");
13         return 1;
14     }
15 
16     SOCKET sClient = NULL;//Linux 中ocket为 int类型
17 
18     struct sockaddr_in addrServ;//套接字地址结构
19     addrServ.sin_family=AF_INET;
20     addrServ.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");//对本机进行扫描
21 
22     for (i = 0; i<portArrLen; i++) {
23 
24         addrServ.sin_port=htons(portArr[i]);//设置端口
25         sClient = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);//赋值套接字
26 
27         //连接服务器, 若connect失败则该套接字不可再用，必须关闭
28         if( (connect(sClient,(struct sockaddr_in *)&addrServ,sizeof(addrServ))) ==0) {
29             printf("%d pen!\n",portArr[i]);
30         }else{
31              printf("%d not pen!\n",portArr[i]);
32         }
33         //无论是否连接成功，我们都关闭套接字
34         closesocket(sClient);
35         sClient=NULL;
36     }
37     puts("扫描结束！");
38     getchar();
39     //终止Winsock 2 DLL (Ws2_32.dll) 的使用.
40     WSACleanup();
41     return 0;
42 }