C++ scan specifies the open ports of the host

极客人 4 years ago (2015-11-19) computer technology | First to comment 44

post score 0 times, average 0.0 ：

C + + scan specified host open port, OS provides a connect () system call, used to establish a connection with a remote host port, if the port is in the frame listening state of the remote host, connect () connection is successful; otherwise, the port is closed.

// ScanPorts.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>
Using namespace std;
#include<WinSock2.h>
#pragma comment (lib,"ws2_32.lib")
#define STATUS_FALIED 0xFFFF
Unsigned long serverIP;
Long MaxThread = 200;
Long ThreadCount = 0;
Long *aa = &ThreadCount;

// Scan port threads
DWORD WINAPI ScanPort(LPVOID lpParam){
	Short Port = *(short*)lpParam;
	InterlockedIncrement(aa);
	// Create streaming socket
	SOCKET sock = socket(AF_INET, SOCK_STREAM,0);
	If (sock == INVALID_SOCKET){
		Cout << "Failed to create a socket!" << endl;
		Return 0;

	}
	Else{
		// Fill in the server address
		Sockaddr_in severAddr;
		severAddr.sin_family = AF_INET;
		severAddr.sin_port = htons(Port);
		severAddr.sin_addr.S_un.S_addr = serverIP;
		// Determine if this machine is turned on
		Connect(sock, (sockaddr*)&severAddr, sizeof(severAddr));
		Struct fd_set write;
		FD_ZERO(&write);
		FD_SET(sock, &write);
		// initialization timeout
		Struct timeval timeout;
		Timeout.tv_sec = 100 / 1000;
		Timeout.tv_usec = 0;
		If (select(0,NULL,&write,NULL,&timeout)>0)
		{
			Cout << Port <<",";
		};
		Closesocket(sock);


	}

	InterlockedDecrement(aa);
	Return 0;
}

Void main(int argc, char *argv[])
{
	If (argc != 2){
		Cout << "Please enter the destination host IP address" << endl;
	
	}
	// Establish binding with socket library
	WSADATA WSAData;
	If (WSAStartup(MAKEWORD(2, 2), &WSAData) != 0)
	{
		Cout << "WSAStartup falied!" << GetLastError() << endl;
		ExitProcess(STATUS_FALIED);
	}
	serverIP = inet_addr(argv[1]);
	Cout << "The following ports are open:" << endl;
	For (int i = 1; i < 1024; i++){
		// exceed the maximum allowable number of threads waiting
		While (ThreadCount >= MaxThread)
			Sleep(10);
		//Create thread, scan port
	DWORD ThreadID;
	CreateThread(NULL, 0, ScanPort, (LPVOID)new short(i), 0, &ThreadID);
	}
	//There are still threads that are not finished waiting
	While (ThreadCount>0)
		Sleep(50);

	WSACleanup();

}

// ScanPorts.cpp : Defines the entry point for the console application.

#include "stdafx.h"

#include<iostream>

Using namespace std;

#include<WinSock2.h>

#pragma comment (lib,"ws2_32.lib")

#define STATUS_FALIED 0xFFFF

Unsigned long serverIP;

Long MaxThread = 200;

Long ThreadCount = 0;

Long *aa = &ThreadCount;

// Scan port threads

DWORD WINAPI ScanPort(LPVOID lpParam){

Short Port = *(short*)lpParam;

InterlockedIncrement(aa);

// Create streaming socket

SOCKET sock = socket(AF_INET, SOCK_STREAM,0);

If (sock == INVALID_SOCKET){

Cout << "Failed to create a socket!" << endl;

Return 0;

}

Else{

// Fill in the server address

Sockaddr_in severAddr;

severAddr.sin_family = AF_INET;

severAddr.sin_port = htons(Port);

severAddr.sin_addr.S_un.S_addr = serverIP;

// Determine if this machine is turned on

Connect(sock, (sockaddr*)&severAddr, sizeof(severAddr));

Struct fd_set write;

FD_ZERO(&write);

FD_SET(sock, &write);

// initialization timeout

Struct timeval timeout;

Timeout.tv_sec = 100 / 1000;

Timeout.tv_usec = 0;

If (select(0,NULL,&write,NULL,&timeout)>0)

{

Cout << Port <<",";

};

Closesocket(sock);

}

InterlockedDecrement(aa);

Return 0;

}

Void main(int argc, char *argv[])

{

If (argc != 2){

Cout << "Please enter the destination host IP address" << endl;

}

// Establish binding with socket library

WSADATA WSAData;

If (WSAStartup(MAKEWORD(2, 2), &WSAData) != 0)

{

Cout << "WSAStartup falied!" << GetLastError() << endl;

ExitProcess(STATUS_FALIED);

}

serverIP = inet_addr(argv[1]);

Cout << "The following ports are open:" << endl;

For (int i = 1; i < 1024; i++){

// exceed the maximum allowable number of threads waiting

While (ThreadCount >= MaxThread)

Sleep(10);

//Create thread, scan port

DWORD ThreadID;

CreateThread(NULL, 0, ScanPort, (LPVOID)new short(i), 0, &ThreadID);

}

//There are still threads that are not finished waiting

While (ThreadCount>0)

Sleep(50);

WSACleanup();

}

C++

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