repo_description: :sailboat: The immutable, decentralized, statically built p2p VPN without any central server and automatic discovery! Create decentralized introspectable tunnels over p2p with shared tokens
repo_topics: blockchain cloudvpn golang golang-library holepunch ipfs ipfs-blockchain kubernetes libp2p mesh mesh-networks nat networking p2p p2pvpn tunnel vpn
code: /*
  Copyright © 2021-2022 Ettore Di Giacinto <[REDACTED_EMAIL]>
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
      http://www.apache.org/licenses/LICENSE-2.0
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  */
  
  package utils
  
  import (
  	"net"
  	"sort"
  
  	"github.com/c-robinson/iplib"
  )
  
  func NextIP(defaultIP string, ips []string) string {
  	if len(ips) == 0 {
  		return defaultIP
  	}
  
  	r := []net.IP{}
  	for _, i := range ips {
  		ip := net.ParseIP(i)
  		r = append(r, ip)
  	}
  
  	sort.Sort(iplib.ByIP(r))
  
  	last := r[len(r)-1]
  
  	return iplib.NextIP(last).String()
  }
  