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 func (me *IPList) NumRanges() int {
39 // Return the range the given IP is in. Returns nil if no range is found.
40 func (me *IPList) Lookup(ip net.IP) (r *Range) {
44 // Find the index of the first range for which the following range exceeds
46 i := sort.Search(len(me.ranges), func(i int) bool {
47 if i+1 >= len(me.ranges) {
50 return bytes.Compare(ip, me.ranges[i+1].First) < 0
52 if i == len(me.ranges) {
56 if bytes.Compare(ip, r.First) < 0 || bytes.Compare(ip, r.Last) > 0 {
62 // Parse a line of the PeerGuardian Text Lists (P2P) Format. Returns !ok but
63 // no error if a line doesn't contain a range but isn't erroneous, such as
64 // comment and blank lines.
65 func ParseBlocklistP2PLine(l []byte) (r Range, ok bool, err error) {
66 l = bytes.TrimSpace(l)
67 if len(l) == 0 || bytes.HasPrefix(l, []byte("#")) {
70 colon := bytes.IndexByte(l, ':')
72 err = errors.New("missing colon")
75 hyphen := bytes.IndexByte(l[colon+1:], '-')
77 err = errors.New("missing hyphen")
81 r.Description = string(l[:colon])
82 r.First = net.ParseIP(string(l[colon+1 : hyphen]))
83 r.Last = net.ParseIP(string(l[hyphen+1:]))
84 if r.First == nil || r.Last == nil {