adding vendor folder

vendor/github.com/malfunkt/iprange/funcs.go

@@ -0,0 +1,92 @@
+package iprange
+
+import (
+	"encoding/binary"
+	"net"
+	"sort"
+)
+
+func streamRange(lower, upper net.IP) chan net.IP {
+	ipchan := make(chan net.IP, 1)
+
+	rangeMask := net.IP([]byte{
+		upper[0] - lower[0],
+		upper[1] - lower[1],
+		upper[2] - lower[2],
+		upper[3] - lower[3],
+	})
+
+	go func() {
+		defer close(ipchan)
+
+		lower32 := binary.BigEndian.Uint32([]byte(lower))
+		upper32 := binary.BigEndian.Uint32([]byte(upper))
+		diff := upper32 - lower32
+
+		if diff < 0 {
+			panic("Lower address is actually higher than upper address.")
+		}
+
+		mask := net.IP([]byte{0, 0, 0, 0})
+
+		for {
+			ipchan <- net.IP([]byte{
+				lower[0] + mask[0],
+				lower[1] + mask[1],
+				lower[2] + mask[2],
+				lower[3] + mask[3],
+			})
+
+			if mask.Equal(rangeMask) {
+				break
+			}
+
+			for i := 3; i >= 0; i-- {
+				if rangeMask[i] > 0 {
+					if mask[i] < rangeMask[i] {
+						mask[i] = mask[i] + 1
+						break
+					} else {
+						mask[i] = mask[i] % rangeMask[i]
+						if i < 1 {
+							break
+						}
+					}
+				}
+			}
+		}
+
+	}()
+
+	return ipchan
+}
+
+// Expand expands an address with a mask taken from a stream
+func (r *AddressRange) Expand() []net.IP {
+	ips := []net.IP{}
+	for ip := range streamRange(r.Min, r.Max) {
+		ips = append(ips, ip)
+	}
+	return ips
+}
+
+// Expand expands and normalizes a set of parsed target specifications
+func (l AddressRangeList) Expand() []net.IP {
+	var res []net.IP
+	for i := range l {
+		res = append(res, l[i].Expand()...)
+	}
+	return normalize(res)
+}
+
+func normalize(src []net.IP) []net.IP {
+	sort.Sort(asc(src))
+	dst := make([]net.IP, 1, len(src))
+	dst[0] = src[0]
+	for i := range src {
+		if !dst[len(dst)-1].Equal(src[i]) {
+			dst = append(dst, src[i])
+		}
+	}
+	return dst
+}