iprange

iprange is a library you can use to parse IPv4 addresses from a string in the nmap format.

It takes a string, and returns a list of Min-Max pairs, which can then be expanded and normalized automatically by the package.

Supported Formats

iprange supports the following formats:

• 10.0.0.1
• 10.0.0.0/24
• 10.0.0.*
• 10.0.0.1-10
• 10.0.0.1, 10.0.0.5-10, 192.168.1.*, 192.168.10.0/24

Corrections

Corrections made to panic on netmasks > 32. Will now return an error. Also adapted the use of goyacc.

To compile:

Install goyacc first:

go install golang.org/x/tools/cmd/goyacc@latest

execute:

go generate to regenerate the parser code in Go

Added tests for check for correct working of netmasks > 32.

Usage

package main

import (
	"log"

	"github.com/malfunkt/iprange"
)

func main() {
	list, err := iprange.ParseList("10.0.0.1, 10.0.0.5-10, 192.168.1.*, 192.168.10.0/24")
	if err != nil {
		log.Printf("error: %s", err)
	}
	log.Printf("%+v", list)

	rng := list.Expand()
	log.Printf("%s", rng)
}