bittwist

libpcap based Ethernet packet generator

Description

bittwist (or Bit-Twist) is designed to complement tcpdump, which by itself has done a great job in capturing network traffic. Bit-Twist can regenerate the captured traffic onto a live network (the packets are generated from tcpdump trace file, generating a .pcap file).

Bit-Twist also comes with a comprehensive trace file editor to allow one to change the contents of a trace file (bittwiste).

Generally, a packet generator is useful in simulating networking traffic or scenario, testing firewall, IDS, and IPS, and troubleshooting various network problems.

The Bit-Twist features are:

* runs on Linux, BSD, macOS, and Windows;

* send multiple trace files at a time;

* send packets at a specific speed or up to your NIC line rate in Mbps using

built-in token bucket algorithm;

* comprehensive trace file editor with control over most fields in

Ethernet, ARP, IP, ICMP, TCP, and UDP headers with automatic header

checksum correction;

* comprehensive trace file editor to edit most fields in

Ethernet, ARP, IPv4, IPv6, ICMPv4, ICMPv6, TCP, and UDP headers;

* automatic header checksum correction;

* send packets with custom QoS bits to test classification/queuing features

of switches/routers;

* append user payload to existing packets after a specific header;

* append user payload (e.g. copy of hex stream from Wireshark) to existing

packets after a specific header;

* select a specific range of packets and save them in another trace file;

* highly scriptable - with proper manipulation you can turn Bit-Twist

into an extremely flexible packet generator tool;

* if you are teaching Computer Networks classes, you may find Bit-Twist

useful as a practical teaching material. It gives your students a

hands-on experience to learn various networking protocols etc.

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Homepage

https://bittwist.sourceforge.io

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