20 func (r *Range) String() string {
21 return fmt.Sprintf("%s-%s (%s)", r.First, r.Last, r.Description)
24 // Create a new IP list. The given range must already sorted by the lower IP
25 // in the range. Behaviour is undefined for lists of overlapping ranges.
26 func New(initSorted []Range) *IPList {
32 // Return the range the given IP is in. Returns nil if no range is found.
33 func (me *IPList) Lookup(ip net.IP) (r *Range) {
34 // Find the index of the first range for which the following range exceeds
36 i := sort.Search(len(me.ranges), func(i int) bool {
37 if i+1 >= len(me.ranges) {
40 return bytes.Compare(ip, me.ranges[i+1].First) < 0
42 if i == len(me.ranges) {
46 if bytes.Compare(ip, r.First) < 0 || bytes.Compare(ip, r.Last) > 0 {
52 // Parse a line of the PeerGuardian Text Lists (P2P) Format. Returns !ok but
53 // no error if a line doesn't contain a range but isn't erroneous, such as
54 // comment and blank lines.
55 func ParseBlocklistP2PLine(l string) (r Range, ok bool, err error) {
56 l = strings.TrimSpace(l)
57 if len(l) == 0 || strings.HasPrefix(l, "#") {
60 colon := strings.IndexByte(l, ':')
61 hyphen := strings.IndexByte(l[colon+1:], '-') + colon + 1
62 r.Description = l[:colon]
63 r.First = net.ParseIP(l[colon+1 : hyphen])
64 r.Last = net.ParseIP(l[hyphen+1:])
65 if r.First == nil || r.Last == nil {