Netcalc is a powerful command-line tool for network calculations, supporting both Fixed-Length Subnet Masking (FLSM) and Variable-Length Subnet Masking (VLSM). It allows users to calculate network ranges, subnet divisions, and binary representations of IP addresses.
netcalc [OPTIONS] [MODE] <IP_ADDRESS> <NETMASK>
Modes
-f, --flsm (Fixed-Length Subnet Masking): Divides a network into subnets of equal size. Requires the number of subnets as an additional parameter.
-v, --vlsm (Variable-Length Subnet Masking): Allows flexible subnetting based on host requirements. No additional parameters required.
Other Options
-h, --help: Displays help information.
-b, --binary: Shows binary representationk.
Examples
netcalc 192.168.1.0 255.255.255.0 → Calculates network range.
netcalc 10.15.100.5 255.224.0.0 → Calculates network range for another IP.
netcalc -f 4 192.168.1.0 255.255.255.0 → Performs FLSM with 4 subnets.
netcalc -f 4 -b 192.168.1.0 255.255.255.0 → Performs FLSM with 4 subnets showing binary representation as well.
netcalc -v 192.168.1.0 255.255.255.0 → Performs VLSM subnetting.
This project uses CTable, a lightweight and efficient open-source library that I developed for generating ASCII-printable tables. CTable simplifies the creation of structured text-based tables, making network calculations more readable.
Check out the project on GitHub to explore its features or contribute!
- Using Build Script
bash build.sh- Manual Compilation with CMake
If you prefer manual compilation, follow these steps:
- Create a build directory:
mkdir build && cd build - Run
cmake .. - Compile the program with
make
This will generate the netcalc executable inside the build directory.
Feel free to contribute improvements, report issues, or suggest new features. Fork the repository, make your changes, and submit a pull request!