pcap-java

Lightweight libpcap Java (JNI) wrapper.

Why pcap-java?

• pcap-java uses JNI to interact with the native stuff, while other libraries use JNA.

How to

Sample code:

    Pcap.init();
    PcapHandle handle = Pcap.openLive("any", 120, 1, 10);
    PcapDumper dumper = handle.dumpOpen("dump.pcap");
    BpfProgram filter = handle.compile("tcp and dst port 80");
    handle.setFilter(filter);
    filter.free();

    LinkType datalink = this.handle.datalink();
    new Thread(() -> {
        try {
            this.handle.loop(-1, (packetHeader, rawPacket) -> {
                try {
                    Packet packet = new Packet();
                    packet.decode(rawPacket, datalink);
                    System.out.println(packet);
                    dumper.dump(packetHeader, rawPacket);
                    dumper.flush();
                } catch (LayerDecodeException | PcapException e) {
                    e.printStackTrace();
                }
            });
        } catch (PcapException e) {
        e.printStackTrace();
        }
    });
    
    dumper.close();
    handle.close();

How to include it

Setup your project via adding our maven repository to your pom.xml or build.gradle file.

• Maven:

    <repositories>
        <repository>
            <id>elytrium-repo</id>
            <url>https://maven.elytrium.net/repo/</url>
        </repository>
    </repositories>

    <dependencies>
        <dependency>
            <groupId>net.elytrium</groupId>
            <artifactId>pcap</artifactId>
            <version>1.0.0</version>
        </dependency>
    </dependencies>

• Gradle:

    repositories {
        maven {
            setName("elytrium-repo")
            setUrl("https://maven.elytrium.net/repo/")
        }
    }

    dependencies {
        implementation("net.elytrium:pcap:1.0.1")
    }

See also

• LimboFilter TCP Listener - Another code example.

Donation

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