Implement virMacAddrIsBroadcastRaw

Add function for testing for Ethernet broadcast address

src/libvirt_private.syms

@@ -1326,6 +1326,7 @@ virMacAddrCompare;
 virMacAddrFormat;
 virMacAddrGenerate;
 virMacAddrGetRaw;
+virMacAddrIsBroadcastRaw;
 virMacAddrIsMulticast;
 virMacAddrIsUnicast;
 virMacAddrParse;

src/util/virmacaddr.c

@@ -30,6 +30,9 @@
 #include "virmacaddr.h"
 #include "virrandom.h"
 
+static const unsigned char virMacAddrBroadcastAddrRaw[VIR_MAC_BUFLEN] =
+    { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
 /* Compare two MAC addresses, ignoring differences in case,
  * as well as leading zeros.
  */
@@ -218,3 +221,9 @@ virMacAddrIsUnicast(const virMacAddrPtr mac)
 {
     return !(mac->addr[0] & 1);
 }
+
+bool
+virMacAddrIsBroadcastRaw(const unsigned char s[VIR_MAC_BUFLEN])
+{
+    return memcmp(virMacAddrBroadcastAddrRaw, s, sizeof(*s)) == 0;
+}

src/util/virmacaddr.h

@@ -52,4 +52,6 @@ int virMacAddrParse(const char* str,
                     virMacAddrPtr addr) ATTRIBUTE_RETURN_CHECK;
 bool virMacAddrIsUnicast(const virMacAddrPtr addr);
 bool virMacAddrIsMulticast(const virMacAddrPtr addr);
+bool virMacAddrIsBroadcastRaw(const unsigned char s[VIR_MAC_BUFLEN]);
+
 #endif /* __VIR_MACADDR_H__ */