diff options
Diffstat (limited to 'node/Switch.cpp')
| -rw-r--r-- | node/Switch.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/node/Switch.cpp b/node/Switch.cpp index 87218b0d..ed646308 100644 --- a/node/Switch.cpp +++ b/node/Switch.cpp @@ -252,9 +252,11 @@ void Switch::onLocalEthernet(const SharedPtr<Network> &network,const MAC &from,c if (to.isMulticast()) { MulticastGroup mg(to,0); - // Handle special cases: IPv4 ARP - if ((etherType == ZT_ETHERTYPE_ARP)&&(data.size() == 28)&&(data[2] == 0x08)&&(data[3] == 0x00)&&(data[4] == 6)&&(data[5] == 4)&&(data[7] == 0x01)) - mg = MulticastGroup::deriveMulticastGroupForAddressResolution(InetAddress(data.field(24,4),4,0)); + if (to.isBroadcast()) { + // Cram IPv4 IP into ADI field to make IPv4 ARP broadcast channel specific and scalable + if ((etherType == ZT_ETHERTYPE_ARP)&&(data.size() == 28)&&(data[2] == 0x08)&&(data[3] == 0x00)&&(data[4] == 6)&&(data[5] == 4)&&(data[7] == 0x01)) + mg = MulticastGroup::deriveMulticastGroupForAddressResolution(InetAddress(data.field(24,4),4,0)); + } // Remember this message's CRC, but don't drop if we've already seen it // since it's our own. |