Added AddressRange class template.

src/ipv6_address.cpp

@@ -41,6 +41,7 @@
 #include <limits>
 #include <sstream>
 #include "ipv6_address.h"
+#include "address_range.h"
 
 namespace Tins {
     IPv6Address::IPv6Address() {
@@ -96,6 +97,19 @@ namespace Tins {
         #endif
         return buffer;
     }
-    
+
+    AddressRange<IPv6Address> operator/(const IPv6Address &addr, int mask) {
+        if(mask > 128)
+            throw std::logic_error("Prefix length cannot exceed 128");
+        IPv6Address last_addr;
+        IPv6Address::iterator it = last_addr.begin();
+        while(mask > 8) {
+            *it = 0xff;
+            ++it;
+            mask -= 8;
+        }
+        *it = 0xff << (8 - mask);
+        return AddressRange<IPv6Address>::from_mask(addr, last_addr);
+    }
 }