Fix: Add random.RandIPv4, random.RandIPv4Private, random.RandIPv4Loopback, random.RandIPv6 Functions

Signed-off-by: vr-varad <varadgupta21@gmail.com>

Author: vr-varad

random/random.go

@@ -152,6 +152,44 @@ func RandIPv4() net.IP {
 	)
 }
 
+// RandIPv4Private Generates a random private IPv4 address.
+func RandIPv4Private() net.IP {
+	n, _ := rand.Int(rand.Reader, big.NewInt(3))
+	switch n.Int64() {
+	case 0:
+		return net.IPv4(
+			10,
+			byte(RandIntRange(1, 256)),
+			byte(RandIntRange(1, 256)),
+			byte(RandIntRange(1, 256)),
+		)
+	case 1:
+		return net.IPv4(
+			172,
+			byte(RandIntRange(16, 32)),
+			byte(RandIntRange(1, 256)),
+			byte(RandIntRange(1, 256)),
+		)
+	default:
+		return net.IPv4(
+			192,
+			168,
+			byte(RandIntRange(1, 256)),
+			byte(RandIntRange(1, 256)),
+		)
+	}
+}
+
+// RandomIPv4Loopback generates IPv4 Loopback address
+func RandIPv4Loopback() net.IP {
+	return net.IPv4(
+		127,
+		0,
+		0,
+		1,
+	)
+}
+
 // RandIPv6 generates a random IPv6 address.
 func RandIPv6() net.IP {
 	ip := make(net.IP, net.IPv6len)