【文件属性】：
文件名称：简单端口扫描器代码
文件大小：32KB
文件格式：DOC
更新时间：2017-01-06 11:18:49
简单端口
#include
#include
#define NETWORK_ERROR -1
#define NETWORK_OK 0
#define PORT_MIN 1
#define PORT_MAX 65535
HANDLE hThread;
DWORD hID;
char hostname[30];
int starting_port = 0;
int ending_port = 0;
int nopen = 0;
DWORD portscan();
int main()
{
int ret;
WSADATA dat;
DWORD version;
version = MAKEWORD(2, 2);
ret = WSAStartup(version, &dat);
if (ret != 0)
{
printf("Error initializing Winsock.\n");
WSACleanup();
return NETWORK_ERROR;
}
if (ret == 0)
{
printf("Enter hostname:");
scanf("%s", hostname);
printf("Enter starting port:");
scanf("%d", &starting_port);
if (starting_port < PORT_MIN)
{
printf("Invalid port number.\n");
WSACleanup();
return NETWORK_ERROR;
}
printf("Enter ending port:");
scanf("%d", &ending_port);
if (ending_port > PORT_MAX)
{
printf("Invalid port number.\n");
WSACleanup();
return NETWORK_ERROR;
}
printf("\nScanning [%s]...\n", hostname);
hThread = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)portscan, 0, 0,
&hID);
if (hThread == 0)
{
printf("Failed to create thread.\n");
WSACleanup();
return NETWORK_ERROR;
}
Sleep( - 1);
}
WSACleanup();
return NETWORK_OK;
}
DWORD portscan()
{
int i, nret;
SOCKET thesocket;
LPHOSTENT hostent;
thesocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
hostent = gethostbyname((hostname));
for (i = starting_port; i < ending_port + 1; ++i)
{
SOCKADDR_IN hostinfo;
hostinfo.sin_family = AF_INET;
hostinfo.sin_addr = *((LPIN_ADDR) *hostent->h_addr_list);
hostinfo.sin_port = htons(i);
nret = connect(thesocket, (LPSOCKADDR) &hostinfo, sizeof(hostinfo));
if (nret == 0)
{
printf("\n\t%d\n", i);
++nopen;
}
}
printf("\nScan complete.\n\n");
printf("Number of ports opened = %d\n", nopen);
closesocket(thesocket);
return 0;
}
