1 files changed, 13 insertions, 5 deletions
diff --git a/src/main/kotlin/IPAddress.kt b/src/main/kotlin/IPAddress.kt
index 4d3967d..5e3cb0c 100644
--- a/src/main/kotlin/IPAddress.kt
+++ b/src/main/kotlin/IPAddress.kt
@@ -11,18 +11,26 @@ class IPAddress {
     constructor(address: String) {
         val split4 = address.split('.')
         val split6 = address.split(':')
-        var bytes: List<Byte> = emptyList()
 
-        if (split4.size == 4) {
-            bytes = split4.map { it.toByte() }
+        val isV4 = split4.size == 4 &&
+                split4.size == split4.filter { it.matches(Regex("^[0-9]$")) }.size
+
+        val isV6 = split6.size == 16 &&
+                split6.size == split6.filter { it.contains(Regex("^[0-9][a-f]$")) }.size
+
+        if (isV4) {
             this.is4 = true
-        } else if (split6.size == 16) {
-            bytes = split4.map { it.toByte(16) }
+        } else if (isV6) {
             this.is4 = false
         } else {
             throw NumberFormatException()
         }
 
+        var bytes: List<Byte> = if (this.is4) {
+            split4.map { it.toByte(10) }
+        } else {
+            split6.map { it.toByte(16) }
+        }
         this.address = bytes.toTypedArray()
     }