pcap4j | A Java library for capturing , crafting , and sending packets | Networking library

by kaitoy Java Version: 1.8.3.3 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(3)Vulnerabilities Install Support

kandi X-RAY | pcap4j Summary

pcap4j is a Java library typically used in Networking applications. pcap4j has no bugs, it has no vulnerabilities, it has build file available and it has high support. However pcap4j has a Non-SPDX License. You can download it from GitHub, Maven.

Pcap4J is a Java library for capturing, crafting and sending packets. Pcap4J wraps a native packet capture library ([libpcap] [WinPcap] or [Npcap] via [JNA] and provides you Java-Oriented APIs.

Support

Quality

Security

License

Reuse

Support

pcap4j has a highly active ecosystem.

It has 1067 star(s) with 301 fork(s). There are 67 watchers for this library.

It had no major release in the last 12 months.

There are 52 open issues and 202 have been closed. On average issues are closed in 48 days. There are 13 open pull requests and 0 closed requests.

It has a negative sentiment in the developer community.

The latest version of pcap4j is 1.8.3.3

Quality

pcap4j has 0 bugs and 0 code smells.

Security

pcap4j has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

pcap4j code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

pcap4j has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

pcap4j releases are not available. You will need to build from source code and install.

Deployable package is available in Maven.

Build file is available. You can build the component from source.

Installation instructions, examples and code snippets are available.

It has 68906 lines of code, 6217 functions and 465 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed pcap4j and discovered the below as its top functions. This is intended to give you an instant insight into pcap4j implemented functionality, and help decide if they suit your requirements.

Calculate the actual length of the message .
Get an integer array from the properties file .
Parses a hex string of bytes into a byte array .
Returns the fragmented packet .
Set the filter to be used .
Main entry point .
Gets a PacketFactory for the specified target class .
Opens a live stream .
Compile filter .
Compares two Packet objects .

Get all kandi verified functions for this library.

pcap4j Key Features

No Key Features are available at this moment for pcap4j.

pcap4j Examples and Code Snippets

No Code Snippets are available at this moment for pcap4j.

Community Discussions

Trending Discussions on pcap4j

Simulate an HTTP/2 stream with pcap4j

Cannot read TcpPacket in pcap4j

java and pcap4j on linux Problem to load class

QUESTION

Simulate an HTTP/2 stream with pcap4j

Asked 2021-Mar-16 at 15:17

I'm trying to capture the unencrypted bytes of a TLS connection and record them into a cap file for analysis of the HTTP/2 traffic. There are a lot of assumptions I am making that this is even possible. But I'm willing to fudge almost everything below the HTTP/2 layer if I can see that traffic in a useful tool like Wireshark.

https://github.com/yschimke/okhttp/commit/c6b0b4c0ba3b59d44cf292955eef2685ed6094e7#diff-d4b38ff70d61641e49af93db2892080f47a2480af92ca151b2daabb50bbc459b

My approach eventually boils down to

...

ANSWER

Answered 2021-Mar-16 at 15:17

For IPv4, Version is always equal to 4. Your image states that you are trying to write IPv4 Header but hex codes shows that it is not the IPv4 header.

First highlighted number is 56. Instead of 5 it should be 4. Hence Wireshark is unable to detect it as a IPv4 packet.

Refer my below link, it will help you to understand the sample format.

How to obtain the source IP from a Wireshark dump of an HTTP GET request

For TCP, it should be 06 instead of bb.

Also your source IP is 0.0.0.0. It will not generate any error but you can change it as per your requirement.

Source https://stackoverflow.com/questions/66612897

QUESTION

Cannot read TcpPacket in pcap4j

Asked 2020-Oct-30 at 13:22

I am trying to use pcap4j to get TcpPackets from loopback address. I can read packets successfully but I cannot convert them to TcpPackets:

...

ANSWER

Answered 2020-Oct-30 at 13:22

The pcap4j repository contains an example of how to deal with fragmented packets:
https://github.com/kaitoy/pcap4j/blob/v1/pcap4j-sample/src/main/java/org/pcap4j/sample/DefragmentEcho.java

Basically you need to group the IpV4Packets based on their header.identification

Source https://stackoverflow.com/questions/64507511

QUESTION

java and pcap4j on linux Problem to load class

Asked 2020-Mar-02 at 22:15

I have tried to write a program using pcap4j for java. I have downloaded and built it. Then I wrote this code using maven:

...

ANSWER

Answered 2020-Mar-02 at 22:15

You get the error because your jar file only contains the App.class itself but not all the dependencies. You can include all the pcap4j jars, your program depends on with maven assembly plugin. You have to place the following configuration inside of ... section of your pom.xml. Attention not inside section !!!

Source https://stackoverflow.com/questions/60495928

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install pcap4j

Pcap4J is available on the Maven Central Repository.
Pcap4J 1.8.2
without source: [pcap4j-distribution-1.8.2-bin.zip](http://search.maven.org/remotecontent?filepath=org/pcap4j/pcap4j-distribution/1.8.2/pcap4j-distribution-1.8.2-bin.zip)
with source: [pcap4j-distribution-1.8.2-src.zip](http://search.maven.org/remotecontent?filepath=org/pcap4j/pcap4j-distribution/1.8.2/pcap4j-distribution-1.8.2-src.zip)
Snapshot builds
https://oss.sonatype.org/content/repositories/snapshots/org/pcap4j/pcap4j-distribution/
Install libpcap, WinPcap, or Npcap:.
Install libpcap, WinPcap, or Npcap: Install WinPcap (if Windows) or libpcap (if Linux/UNIX). It's needed for the unit tests which are run during a build.
Install JDK: Download and install JDK 9, 10, or 11, and set the environment variable ***JAVA_HOME*** properly.
Add the JDK to [Maven toolchains](https://maven.apache.org/guides/mini/guide-using-toolchains.html): Create [toolchains.xml](https://maven.apache.org/ref/3.6.1/maven-core/toolchains.html) describing the JDK installed at the previous step and put it into `~/.m2/`. `toolchains.xml` is like below: ```xml <?xml version="1.0" encoding="UTF-8"?> <toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 http://maven.apache.org/xsd/toolchains-1.1.0.xsd"> <toolchain> <type>jdk</type> <provides> <version>11</version> </provides> <configuration> <jdkHome>/path/to/jdk-11</jdkHome> </configuration> </toolchain> </toolchains> ```
Install Git: Download [Git](http://git-scm.com/downloads) and install it. This step is optional.
Clone the Pcap4J repository: If you installed Git, execute the following command: `git clone git@github.com:kaitoy/pcap4j.git`<br> Otherwise, download the repository as a [zip ball](https://github.com/kaitoy/pcap4j/zipball/v1) and extract it.
Build: Open a command prompt/a terminal, `cd` to the project root directory, and execute `./mvnw install`. Note Administrator/root privileges are needed for the unit tests.