Re: [libvirt] [PATCH] Add V6LOCAL parameter to nwfilter rules.

On Wed, Apr 02, 2014 at 03:40:14PM -0400, Brian Rak wrote: > @@ -163,6 +164,28 @@ virNWFilterVarHashmapAddStdValues(virNWFilterHashTablePtr table, > "%s", _("Could not add variable 'MAC' to hashmap")); > return -1; > } > + > + virMacAddr parsedMac; > + if (virMacAddrParse(macaddr, &parsedMac) == 0) > + { > + parsedMac.addr[0] ^= 2; > + > + char euiMacAddr[26]; > + snprintf(euiMacAddr, sizeof(euiMacAddr), "fe80::%x%x:%xff:fe%x:%x%x", parsedMac.addr[0], parsedMac.addr[1], parsedMac.addr[2], > + parsedMac.addr[3], parsedMac.addr[4], parsedMac.addr[5]); Unfortunately this IPv6 addressing scheme isn't portable. Windows Vista will create link local addresses which are completely random, not based on the MAC address. http://technet.microsoft.com/en-us/magazine/2007.08.cableguy.aspx I wonder if there's a way todo something more clever for IPv6 to learn the addresses, we as do for IPv4 address learning, or snoop route advertisment traffic as we do for DHCP Regards, Daniel