Repository files navigation

Use pcap4j to detect a mac address of remote host

I searched the whole website, and I found no solution provided to detect a mac address of remote host under same subnetwork.

So I created this project.

I used pcap4j to send and filtering packets.and for a IPv4 address, I used arp protocol related function to extract the mac address.and for a IPv6 address, I used ndp (neighbor discovery) protocol related function to extract the mac address.

1. pcap4j 1.7.3
   
2. libpcap. (ready for use version files has been uploaded into libpcapfiles)

gradle:

implementation group:'io.gitee.gaoxingliang', name:'mac-address-detector-java', version:'0.0.1'

mvn:

<dependency>    <groupId>io.gitee.gaoxingliang</groupId>    <artifactId>mac-address-detector-java</artifactId>    <version>0.0.1</version></dependency>

and use it, see fullTest:

MacAddressaddress =MacAddressHelper.getInstance()        .getMacAddress(Inet4Address.getByName("192.168.110.100"));

the pre-built dep files are underlibpcapfiles directory.
on linux, you can load the libpcap directly without install anything

java -Dorg.pcap4j.core.pcapLibName=libpcap.so YourProgram

On windows, the npcap is required to be installed. (no reboot required)

java -Dorg.pcap4j.core.pcapLibName=wpcap.dll -Dorg.pcap4j.core.packetLibName=Packet.dll YourProgram

release the lib to mvn repo. and renaming the package.

Add a func to do packet dump by using pcap4j.After build the jar, call the main class PacketDump.java -Dorg.pcap4j.core.pcapLibName=libpcap.so -cp .:networkutils-all-0.2.jar PacketDump "udp"