openvpn-mgt/utils.go

package main

import (
	"math/big"
	"net"
	"sort"

	"github.com/pyke369/golang-support/uconfig"
)

// check if there is a member of "search" in "list". sort list to be more
// efficiant. adapt with sorting "search" too
func inArray(search, list []string) bool {
	sort.Strings(list)
	for _, g := range search {
		i := sort.Search(len(list), func(i int) bool { return list[i] >= g })
		if i < len(list) && list[i] == g {
			return true
			break
		}
	}
	return false
}

// parse a uconf array
func parseConfigArray(config *uconfig.UConfig, configpath string) []string {
	result := []string{}
	for _, i := range config.GetPaths(configpath) {
		if s := config.GetString(i, ""); s == "" {
			continue
		} else {
			result = append(result, s)
		}
	}
	return result
}

func nextIP(ip net.IP) net.IP {
	// Convert to big.Int and increment
	ipb := big.NewInt(0).SetBytes([]byte(ip))
	ipb.Add(ipb, big.NewInt(1))

	// Add leading zeros
	b := ipb.Bytes()
	b = append(make([]byte, len(ip)-len(b)), b...)
	return net.IP(b)
}