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mac-address-detector-java

Use pcap4j to detect a mac address of remote host

Reason

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.

Implementation

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.

Dependency

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

how to use

1. import this dependency

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 full Test:

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

2.1 Use it on linux

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

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

2.2 Use it on windows

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

Changes

09-06-2024

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

01-24-2018

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"