# IGMP Packet Generator

## Overview

The IGMP Packet Generator is a specialized tool designed for generating various
types of Internet Group Management Protocol (IGMP) p ackets. This tool is
particularly useful for network administrators, developers, and researchers
involved in testing and analyzing ne twork protocols, multicast networks, and
network security systems.

## Features

* **Support for Multiple IGMP Versions**: Compatible with IGMPv1, IGMPv2, and IGMPv3.
* **Variety of IGMP Packets**: Capable of generating Query, Report, Leave, and other IGMP packet types.
* **Customizable Packet Parameters**: Allows setting of source/destination IPs, ports, and multicast groups.
* **Router Alert Option**: Implements the Router Alert IP option (IPOPT_RA).

## Requirements

* Unix-like operating system.
* `libnet` library
* CMake for building the project.

For debian/ubuntu, simply type:

```shell-session
sudo apt-get install cmake libnet1-dev
```

## Install

### Clone the Repository (if applicable):

```bash
git clone [repository-url]
cd igmpgen
```

### Build with CMake:

Create a build directory:

```shell-session
mkdir _build && cd _build
```

Run CMake and build the project:

```shell-session
cmake ..
cmake --build .
```

### Install binaries

```shell-session
cmake ..
cmake --install .
```

## Usage

After building, you can run `igmpgen` with the necessary command-line arguments:

### Command-Line Arguments

```bash
IGMP packet generator

Usage: ./igmpgen [options]

Options:
  -i <interface>   Specify the network interface (e.g., eth0)
  -t <type>        Specify the IGMP packet type and version (e.g., 1.query)
  -g <group>       Specify the IGMP group (e.g., 224.0.0.1)
  -s <source>      Specify the source IP and port (e.g., 192.168.1.1:1234)
  -d <destination> Specify the destination IP and port (e.g., 224.0.0.2:5678)
  -n <number>      Specify delay between packets in seconds (optional)

Available IGMP packet types:
 - 1.query
 - 1.report
 - 1.dvmrp
 - 2.query
 - 2.report
 - 2.leave
 - 3.report
```

### Example

Generate an IGMPv2 Membership Report for group `224.0.0.1` on `eth0`:

```bash
./igmpgen -i eth0 -g 224.0.0.1 -t 2.report
```

## Contributing

Contributions to `igmpgen` are welcome. Please feel free to report issues,
suggest features, or submit pull requests.

## License

This project is licensed under the LGPL 3.0-or-later.