llnut / available-ip

A shell script based on ping to fetch the remaining available IP addresses in a local area network.

available-ip

This script uses ping to fetch the remaining available IP addresses in the local network. You can specify the local network, the number of IP addresses to fetch, and whether consecutive IP addresses are required.

Usage

Show help message

available-ip -h

Fetch from given network

Subnet masks support both the traditional representation and the CIDR representation.

available-ip -n 192.168.10.1/24

or

available-ip -n 192.168.10.1/255.255.255.0

Fetch a specified number of IP addresses

The following command retrieves five IP addresses from the 192.168.10.1/24 network.

available-ip -n 192.168.10.1/255.255.255.0 5

If the number is specified as 0, all available IP addresses will be fetched.

available-ip -n 192.168.10.1/255.255.255.0 0

Fetch consecutive IP addresses

The following command retrieves two consecutive IP addresses from the 192.168.10.1/24 network.

available-ip -n 192.168.10.1/255.255.255.0 -c true 2

Fetch timeout for each reply.

The following command sets the timeout for single IP fetch to 2 seconds.

available-ip -t 2

License

MIT © llnut