iprange

Package iprange parses IPv4/IPv6 addresses from strings in IP range format.

Supported IP range formats

• 172.18.0.1 / fd00::1
• 172.18.0.0/24 / fd00::/64
• 172.18.0.1-10 / fd00::1-a
• 172.18.0.1-172.18.1.10 / fd00::1-fd00::1:a

Example

package main

import (
	"fmt"
	"log"

	"github.com/iiiceoo/iprange"
)

func main() {
	// Parse IP ranges.
	ranges, err := iprange.Parse(
		"172.18.0.1",
		"172.18.0.0/24",
		"172.18.0.1-10",
		"172.18.1.1-172.18.1.3",
	)
	if err != nil {
		log.Fatalf("failed to parse IP ranges: %v\n", err)
	}
	fmt.Printf("%s IP ranges: %s\n", ranges.Version(), ranges)

	// Merge IP ranges.
	merged := ranges.Merge()
	fmt.Printf("Merged IP ranges: %s\n", merged)

	// Interval mathematics of IP ranges.
	another, _ := iprange.Parse("172.18.0.0/24")
	diff := merged.Diff(another)
	fmt.Printf("The difference between two IP ranges: %s\n", diff)

	// Convert IP ranges to IP addresses.
	fmt.Printf("Iterate through all %d IP addresses:\n", diff.Size())
	ipIter := diff.IPIterator()
	for {
		ip := ipIter.Next()
		if ip == nil {
			break
		}
		fmt.Println(ip)
	}
}

License

Package iprange is MIT-Licensed.