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ipRangeMan.go
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/
ipRangeMan.go
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package lib
import (
"net/netip"
"sort"
"strings"
)
type IPRangeMan struct {
sorted bool
ipv4Ranges ipRangeList
ipv6Ranges ipRangeList
}
func (man *IPRangeMan) AddByString(strRange string) error {
prefix, err := createRange(strRange)
if err != nil {
return err
}
addr := prefix.Addr()
if addr.Is4() {
man.ipv4Ranges = append(man.ipv4Ranges, prefix)
man.sorted = false
} else if addr.Is6() {
man.ipv6Ranges = append(man.ipv6Ranges, prefix)
man.sorted = false
}
return nil
}
func (man *IPRangeMan) sort() {
if man.sorted {
return
}
man.sorted = true
sort.Sort(man.ipv4Ranges)
sort.Sort(man.ipv6Ranges)
}
func (man *IPRangeMan) MatchAddr(addr netip.Addr) bool {
if !man.sorted {
man.sort()
}
if addr.Is4() {
return man.ipv4Ranges.BinaryMatchAddr(addr)
} else if addr.Is6() {
return man.ipv6Ranges.BinaryMatchAddr(addr)
} else {
return false
}
}
func (man *IPRangeMan) MatchStringAddr(strAddr string) bool {
addr, err := netip.ParseAddr(strAddr)
if err != nil {
return false
}
return man.MatchAddr(addr)
}
func (man *IPRangeMan) HasData() bool {
return len(man.ipv4Ranges) > 0 || len(man.ipv6Ranges) > 0
}
func NewIPRangeMan() *IPRangeMan {
return &IPRangeMan{}
}
func createRange(strRange string) (prefix netip.Prefix, err error) {
if slashIndex := strings.IndexByte(strRange, '/'); slashIndex >= 0 {
prefix, err = netip.ParsePrefix(strRange)
} else {
var addr netip.Addr
addr, err = netip.ParseAddr(strRange)
if err == nil {
prefix = netip.PrefixFrom(addr, addr.BitLen())
}
}
return
}