package?ping;

import?java.io.IOException;
import?java.net.Inet4Address;
import?java.net.InetAddress;
import?java.net.MalformedURLException;
import?java.net.URL;
import?java.net.UnknownHostException;
import?java.util.Scanner;

import?jpcap.JpcapCaptor;
import?jpcap.JpcapSender;
import?jpcap.NetworkInterface;
import?jpcap.NetworkInterfaceAddress;
import?jpcap.packet.EthernetPacket;
import?jpcap.packet.ICMPPacket;
import?jpcap.packet.IPPacket;
import?jpcap.packet.Packet;
import?util.Util;

public?class?Main?{

	public?static?void?main（String[]?args）?{

		NetworkInterface[]?devices?=?JpcapCaptor.getDeviceList（）;

		InetAddress?ip?=?null;
		String?strip?=?““;

		if?（args.length?>?0）?{
			strip?=?args[0];
		}?else?{
			System.out.print（“請輸入域名或者IP地址：“）;
			Scanner?sc?=?new?Scanner（System.in）;
			strip?=?sc.nextLine（）;
			sc.close（）;
		}

		try?{
			ip?=?InetAddress.getByName（strip）;
		}?catch?（UnknownHostException?e）?{
			System.out.println（“無法找到主機：“?+?strip）;
			System.exit（0）;
		}

		if?（args.length?>=?3?&&?args[1].toLowerCase（）.equals（“-n“））?{
			try?{
				int?times?=?Integer.parseInt（args[2]）;
				ping（devices[0]?ip?times）;
			}?catch?（NumberFormatException?e）?{
				ping（devices[0]?ip?4）;
			}

		}?else?{
			ping（devices[0]?ip?4）;
		}

	}

	public?static?void?ping（NetworkInterface?device?InetAddress?dstIP?int?times）?{
		InetAddress?srcIP?=?null;

		for?（NetworkInterfaceAddress?addr?:?device.addresses）?{
			if?（addr.address?instanceof?Inet4Address）?{
				srcIP?=?addr.address;
				break;
			}
		}


		int?timeout?=?1000;
		JpcapCaptor?captor?=?null;
		try?{
			captor?=?JpcapCaptor.openDevice（device?2000?false?timeout）;
		}?catch?（IOException?e）?{
			e.printStackTrace（）;
		}

		byte[]?defaultGatewayMacAddress?=?null;
		InetAddress?baiduIP?=?null;
		try?{
			baiduIP?=?InetAddress.getByName（“www.baidu.com“）;
		}?catch?（UnknownHostException?e1）?{
			e1.printStackTrace（）;
		}

		while?（true）?{
			try?{
				new?URL（“http://www.baidu.com“）.openStream（）.close（）;
			}?catch?（MalformedURLException?e）?{
				e.printStackTrace（）;
			}?catch?（IOException?e）?{
				e.printStackTrace（）;
			}
			Packet?p?=?captor.getPacket（）;

			if?（p?==?null）?{
				continue;
			}

			IPPacket?packet?=?（IPPacket）?p;

			if?（packet?==?null）?{
				System.out.println（“[調試信息]獲取默認網關MAC地址失敗，正在重試。。。“）;
			}?else?{
				if?（packet.dst_ip.getHostAddress（）.equals（baiduIP.getHostAddress（）））?{
					defaultGatewayMacAddress?=?（（EthernetPacket）?packet.datalink）.dst_mac;
					break;
				}
			}
		}

		System.out.println（“[調試信息]默認網關的MAC地址：“?+?Util.bytes2MacAddress（defaultGatewayMacAddress））;
		System.out.println（）;
		System.out.println（）;

		try?{
			captor.setFilter（“icmp?and?src?host?“?+?dstIP.getHostAddress（）?true）;
		}?catch?（IOException?e）?{
		}

		byte[]?data?=?“abcdefghijklmnopqrstuvwxyz123456“.getBytes（）;
		JpcapSender?sender?=?captor.getJpcapSenderInstance（）;
		short?seq?=?1;

		System.out.println（String.format（“正在?Ping?%s?具有?%d?字節的數據：“?dstIP.getHostAddress（）?data.length））;

		in

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\Jpcap\
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\Jpcap\Jpcap-0.7-32bit\
?????文件???????81920??2018-07-24?12:25??java_icmp_ping-master\Jpcap\Jpcap-0.7-32bit\Jpcap.dll
?????文件???????27288??2018-07-24?12:25??java_icmp_ping-master\Jpcap\Jpcap-0.7-32bit\jpcap.jar
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\Jpcap\Jpcap-64bit\
?????文件???????89600??2018-07-24?12:25??java_icmp_ping-master\Jpcap\Jpcap-64bit\Jpcap.dll
?????文件???????18192??2018-07-24?12:25??java_icmp_ping-master\Jpcap\Jpcap-64bit\jpcap.jar
?????文件?????????400??2018-07-24?12:25??java_icmp_ping-master\README.md
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\libs\
?????文件???????18192??2018-07-24?12:25??java_icmp_ping-master\libs\jpcap.jar
?????文件??????214790??2018-07-24?12:25??java_icmp_ping-master\screenshot.jpg
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\src\
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\src\ping\
?????文件????????5425??2018-07-24?12:25??java_icmp_ping-master\src\ping\Main.java
?????文件????????5762??2018-07-24?12:25??java_icmp_ping-master\src\ping\Main2.java
?????目錄???????????0??2018-07-24?12:25??java_icmp_ping-master\src\util\
?????文件????????1333??2018-07-24?12:25??java_icmp_ping-master\src\util\Util.java
?????文件????????1687??2018-07-24?12:25??java_icmp_ping-master\src\util\Util2.java