X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=folly%2FIPAddressV6.h;h=a1d0c7cbd3a9cd20d1e5cca951dccd64119fc939;hb=de821c225980359651a07b670174ae90d4f655c8;hp=8e29f80489b8737ffbd3b450e8ac1a8da6b11a77;hpb=ed8c80a0e0988e4ce687f51ca832a00e4a6b7930;p=folly.git

diff --git a/folly/IPAddressV6.h b/folly/IPAddressV6.h
index 8e29f804..a1d0c7cb 100644
--- a/folly/IPAddressV6.h
+++ b/folly/IPAddressV6.h
@@ -25,6 +25,7 @@
 #include <stdexcept>
 
 #include <folly/Hash.h>
+#include <folly/Optional.h>
 #include <folly/Range.h>
 #include <folly/detail/IPAddress.h>
 
@@ -209,6 +210,16 @@ class IPAddressV6 {
    */
   bool isLinkLocal() const;
 
+  /**
+   * Return the mac address if this is a link-local IPv6 address.
+   *
+   * @return an Optional<MacAddress> union representing the mac address.
+   *
+   * If the address is not a link-local one it will return an empty Optional.
+   * You can use Optional::value() to check whether the mac address is not null.
+   */
+  Optional<MacAddress> getMacAddressFromLinkLocal() const;
+
   /**
    * Return true if this is a multicast address.
    */