Simple Port Scanner 업그레이드 시키기

포트 스캐닝 기법에는 방식에 따라 여러가지로 나뉘며, 이때마다 매번 코드를 제작해야 하는 귀찮음을 벗어나기 위해

기존 Simple Port Scanner의 소스코드를 조금 수정하도록 한다.

1차 리팩토링!

gcc SimplePortScanner.c -o SimplePortScanner

SimplePortScanner.c

#include <stdio.h>  
#include <unistd.h>  
#include <stdlib.h>  
#include <string.h>  
#include <sys/socket.h>  
#include <sys/stat.h>  
#include <arpa/inet.h>  
#include "printfColor.h"

#define	SUCCESS	1
#define	FAILED	-1

const int start_port	= 1;  
const int end_port	= 65535;

char *host_addr;

int option = -1;	// PORT SCANNING TYPE

void TCPScanning ();
void *try_tcp_port (int port);
void usage (char *programName);
int printOption ();
  
int main (int argc, char *argv[])  
{
	int result;

/* Check args, and print a message if wrong */
	if (argc < 2)
	{
		usage (argv[0]);
		return FAILED;
	}

/* Set host adress */
	host_addr = argv[1];

/* Select option */
	result = printOption ();
	while (result == FAILED)
	{
		option = -1;
		result = printOption ();
	}

switch (option)
	{
	case 0:	TCPScanning ();	break;
	}

return 0;  
}

void TCPScanning ()
{
	int i = 0;

printf(BLUE "\t\tPort\t\tState\t\tService\n\n" RESET);
  
	for (i = start_port; i <= end_port; i++)
	{
		try_tcp_port (i);	 
	}

printf(BLUE "\n\nScan complete!\n\n");
}

void *try_tcp_port (int port)
{
	int sock = 0;
	struct sockaddr_in dest_addr;    // 구조체

if ((sock = socket (PF_INET, SOCK_STREAM, 0)) < 0)  // 소켓 생성  
	{
		printf ("Couldn't make socket!\n");  
		exit(-1);  
	}

/* Setting up the sockaddr_in struct with connection details, port, 'family', hostname/IP address */
	memset (&dest_addr, 0, sizeof(dest_addr));  
	dest_addr.sin_family = AF_INET;
	dest_addr.sin_addr.s_addr = inet_addr(host_addr);
	dest_addr.sin_port = htons(port);

if (connect(sock, (struct sockaddr*) &dest_addr, sizeof (dest_addr)) < 0)   //connect() 성공 여부에 따라 open / close 나뉨  
	{
		printf ("%d : Close\n", port);
	}
	else 
	{
		printf ("%d : Open\n", port);
	}

close ( sock );
}

void usage (char *programName)
{
        printf (RED "Usage: %s <host/ip> [-tsu] [-p] [-b number] [-e number] [-c number] [-v]\n", programName);
        printf (RED "\n\nRootscan was written by shaunige@yahoo.co.uk,\nEckz - mrx@netlane.com - http://freewebs.com/bh_x,\n");
        printf (RED "InvisibleGhost : i_t_rules@hotmail.com,\nand Ozzy.\nBug testers: Threadhead and Odins_Son, p4n_n0s.\n");
        printf (RED "\n\t-u : Scan for UDP Ports\n");
        printf (RED "\tUDP scanning option is currently experimental.\n");
        printf (RED "\t-s : Scan using SYN scanning (stealthy).\n");
        printf (RED "\t-t : Scan using TCP connect() scanning (default).\n");
        printf (RED "\t-p : Scan in parallel mode, using threads (faster in some cases)\n");
        printf (RED "\t-b number: start scanning at port number. (default = 1)\n");
        printf (RED "\t-e number: stop scanning at port number. (default = 65535)\n");
        printf (RED "\t-c number: Set connect() timeout (default = 3, \n\tcurrently only affects tcp connect() scan.)\n");
        printf (RED "\t-v: Be verbose (mostly for debugging or checking speed)\n\n");
}

int printOption ()
{
	printf ("Choose scanning type...\n");
	printf ("[0] : TCP Scanning\n");
	printf ("> ");

scanf ("%d", &option);
	
	if (option < 0 || option > 0)
		return FAILED;
	else
		return SUCCESS;
}

printfColor.h

저작자표시

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