#include??
#include??//printf函數要用的頭文件?
#pragma?comment（lib“ws2_32.lib“）?

void?Help（）;?//申明幫助函數?

int?main（int?argc?char*?argv[]）?
{?
//申明變量?
WORD?wVersion?=?MAKEWORD（20）;?//socket的版本?
WSADATA?wsaData;?
//sockaddr_in結構?
struct?sockaddr_in?sin;?
int?iFromPort;?//開始端口?
int?iToPort;?//結束端口?
int?iNowPort;?//正在掃描的端口?
char*?cHost;?//要掃描的主機?
SOCKET?s;?//保存創建socket時的返回值?
int?iOpenPort;?//開放端口個數?
iOpenPort?=?0;?

//如果命令行下參數不是4個（包括portscan.exe本身），提示正確的用法?
if（argc?!=?4）?
{?
?//?Help（）;?//給出幫助?
??return?-1;?
}?

//保存用戶輸入的要掃描的起始端口和結束端口?
//由于用戶輸入的是char型，所以要先轉成int型?
iFromPort?=?atoi（argv[2]）;?
iToPort?=?atoi（argv[3]）;?
cHost?=?argv[1];?

//對用戶輸入的端口進行判斷?
if（iFromPort?>?iToPort?||?iFromPort?65535?||?iToPort?<0?||?iToPort?>65535）?
{?
??printf（“起始端口不能大于結束端口，且范圍為：1-65535!\n“）;?
??return?0;?
}?

if?（WSAStartup（wVersion??&wsaData））?
{?
??printf（“初始化失敗！“）;?
??return?-1;?
}?

printf（“=======?開始掃描?=======\n“）;?

//循環連結端口，以判斷端口是否開放?
for（iNowPort?=?iFromPort;?iNowPort?<=?iToPort;?iNowPort++）?
{?
??s?=?socket（AF_INETSOCK_STREAM0）;?
??if（s?==?INVALID_SOCKET）?
??{?
???printf（“創建socket（）失敗！\n“）;?
???WSACleanup（）;???
??}?
???
??//給結構成員賦值?
??sin.sin_family?=?AF_INET;?
??sin.sin_port?=?htons（iNowPort）;?
??sin.sin_addr.S_un.S_addr?=?inet_addr（cHost）;?
???
??//建立連結?
??if（connect（s（struct?sockaddr*）&sinsizeof（sin））?==?SOCKET_ERROR）?
??{?
???printf（“%s?->?%d:未開放\n“cHostiNowPort）;???
???closesocket（s）;?
??}?
??else?
??{?
???printf（“%s?->?%d:開放\n“cHostiNowPort）;?
???iOpenPort?++;?
???closesocket（s）;?
??}???
}?

printf（“=======?掃描結果?=======\n“）;?
printf（“主機：%s?掃描到%d個端口開放“cHostiOpenPort）;?
//關閉socket?
closesocket（s）;?
WSACleanup（）;?
return?0;?
}?

/*
//以下為幫助函數內容?
void?Help（）?
{?
printf（“\nPortScan?V1.0?by:∮明天去要飯\n“）;?
printf（“Usage:\n“）;?
printf（“??PortScan.exe???\n“）;?
printf（“Example:\n“）;?
printf（“??PortScan.exe?127.0.0.1?135?445\n“）;???
}
*/

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-06-04?10:54??端口掃描\
?????文件????????2250??2011-05-29?16:42??端口掃描\port_scan.cpp
?????文件????????3437??2011-05-29?16:37??端口掃描\port_scan.dsp
?????文件?????????543??2011-05-29?16:42??端口掃描\port_scan.dsw
?????文件???????33792??2011-05-29?16:42??端口掃描\port_scan.ncb
?????文件???????48640??2011-05-29?16:42??端口掃描\port_scan.opt
?????文件?????????769??2011-05-29?16:42??端口掃描\port_scan.plg
?????文件????????2468??2011-05-29?16:50??端口掃描\port_scan2.cpp
?????文件????????3449??2011-05-29?16:50??端口掃描\port_scan2.dsp
?????文件?????????545??2011-05-29?16:50??端口掃描\port_scan2.dsw
?????文件???????41984??2011-05-29?16:50??端口掃描\port_scan2.ncb
?????文件???????48640??2011-05-29?16:50??端口掃描\port_scan2.opt
?????文件?????????838??2011-05-29?16:50??端口掃描\port_scan2.plg
?????文件????????1295??2011-05-29?17:02??端口掃描\port_scan3.cpp
?????文件????????3449??2011-05-29?16:59??端口掃描\port_scan3.dsp
?????文件?????????545??2011-05-29?17:22??端口掃描\port_scan3.dsw
?????文件???????41984??2011-05-29?17:22??端口掃描\port_scan3.ncb
?????文件???????48640??2011-05-29?17:22??端口掃描\port_scan3.opt
?????文件?????????842??2011-05-29?17:02??端口掃描\port_scan3.plg