Merge pull request #369 from avast/ipv6-local-unicast

add IPv6 check for Link-Local unicast address

Author: mfontanini

include/tins/ipv6_address.h

@@ -230,6 +230,14 @@ class TINS_API IPv6Address {
      */
     bool is_multicast() const;
 
+    /**
+     * \brief Return true if this is a Link-Local unicast IPv6 address.
+     *
+     * This method returns true if this address is in the address range
+     * fe80::/10, false otherwise
+     */
+    bool is_local_unicast() const;
+
     /**
      * \brief Returns the size of an IPv6 Address.
      *

src/ipv6_address.cpp

@@ -57,6 +57,7 @@ namespace Tins {
 
 const IPv6Address loopback_address = "::1";
 const AddressRange<IPv6Address> multicast_range = IPv6Address("ff00::") / 8;
+const AddressRange<IPv6Address> local_unicast_range = IPv6Address("fe80::") / 10;
 
 IPv6Address IPv6Address::from_prefix_length(uint32_t prefix_length) {
     IPv6Address address;
@@ -138,6 +139,10 @@ bool IPv6Address::is_multicast() const {
     return multicast_range.contains(*this);
 }
 
+bool IPv6Address::is_local_unicast() const {
+    return local_unicast_range.contains(*this);
+}
+
 ostream& operator<<(ostream& os, const IPv6Address& addr) {
     return os << addr.to_string();
 }