[LLC]: add multicast support for datagrams

Allow mulitcast reception of datagrams (similar to UDP).
All sockets bound to the same SAP receive a clone.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/net/llc_if.h b/include/net/llc_if.h
index a05d04ac4513..c608812a8e89 100644
--- a/include/net/llc_if.h
+++ b/include/net/llc_if.h
@@ -79,6 +79,10 @@ static inline int llc_addrany(const struct llc_addr *addr)
         return llc_mac_null(addr->mac) && !addr->lsap;
 }
 
+static inline int llc_mac_multicast(const u8 *mac)
+{
+        return is_multicast_ether_addr(mac);
+}
 /**
  *      llc_mac_match - determines if two mac addresses are the same
  *      @mac1: First mac address to compare.