scanhost_head.h

关键字: socket, 校验和算法, ICMP, connect, 端口,扫描, 这是我课程设计时,用VC.NET写的一个程序,功能是在利用socket提供的API函数, 填充并发送ICMP包,测

#pragma  pack(4)

#pragma	comment(lib, "Ws2_32.lib")

#define		WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/timeb.h>
#include <time.h>
#include <iostream>
using namespace std;


/* the ip header */
typedef	struct  iphdr{
	unsigned int		headlen:4;								//ip head length
	unsigned int		version:4;								//ip version number
	unsigned char		tos;									//servers type
	unsigned short		totallen;								//ip packge total length
	unsigned short		id;										//id number
	unsigned short		flag;									// flags
	unsigned char		ttl;									// life time
	unsigned char		prot;									// protocol (tcp or udp)
	unsigned short		checksum;								// check sum
	
	unsigned int		sourceIP;								//source ip
	unsigned int		destIP;									//dest  ip
}IpHeader;

// ICMP header

typedef  struct		icmphdr{
	BYTE				type;									//icmp type; the echo request type number is 8
	BYTE				code;									// detail type
	USHORT				checksum;								// check sum
	USHORT				id;										// icmp packge id number
	USHORT				seq;									// icmp data packge's serial number
}IcmpHeader;

//const data define
#define		ICMP_ECHO				8
#define		ICMP_ECHO_REPLY			0
#define		ICMP_MIN				8
#define		STATUS_FAILED			0xFFFF
#define		DEF_PACKET_SIZE			32
#define		MAX_PACKET				1024
#define		MAX_PING_PACKET_SIZE	( MAX_PACKET + sizeof(IpHeader))


// define function 
void		fill_icmp_data( char *, int );
USHORT		checksum( USHORT *, int );
void		decode_resp( char*, int, struct sockaddr_in * );
DWORD		WINAPI FindIP(LPVOID pIPAddrTemp);