func (n *network) watchMiss(nlSock *nl.NetlinkSocket) {
for {
msgs, err := nlSock.Receive()
if err != nil {
logrus.Errorf("Failed to receive from netlink: %v ", err)
continue
}
for _, msg := range msgs {
if msg.Header.Type != syscall.RTM_GETNEIGH && msg.Header.Type != syscall.RTM_NEWNEIGH {
continue
}
neigh, err := netlink.NeighDeserialize(msg.Data)
if err != nil {
logrus.Errorf("Failed to deserialize netlink ndmsg: %v", err)
continue
}
if neigh.IP.To4() == nil {
continue
}
// Not any of the network's subnets. Ignore.
if !n.contains(neigh.IP) {
continue
}
logrus.Debugf("miss notification for dest IP, %v", neigh.IP.String())
if neigh.State&(netlink.NUD_STALE|netlink.NUD_INCOMPLETE) == 0 {
continue
}
if !n.driver.isSerfAlive() {
continue
}
mac, IPmask, vtep, err := n.driver.resolvePeer(n.id, neigh.IP)
if err != nil {
logrus.Errorf("could not resolve peer %q: %v", neigh.IP, err)
continue
}
if err := n.driver.peerAdd(n.id, "dummy", neigh.IP, IPmask, mac, vtep, true); err != nil {
logrus.Errorf("could not add neighbor entry for missed peer %q: %v", neigh.IP, err)
}
}
}
}
func (n *network) watchMiss(nlSock *nl.NetlinkSocket) {
for {
msgs, err := nlSock.Receive()
if err != nil {
logrus.Errorf("Failed to receive from netlink: %v ", err)
continue
}
for _, msg := range msgs {
if msg.Header.Type != syscall.RTM_GETNEIGH && msg.Header.Type != syscall.RTM_NEWNEIGH {
continue
}
neigh, err := netlink.NeighDeserialize(msg.Data)
if err != nil {
logrus.Errorf("Failed to deserialize netlink ndmsg: %v", err)
continue
}
if neigh.IP.To16() != nil {
continue
}
if neigh.State&(netlink.NUD_STALE|netlink.NUD_INCOMPLETE) == 0 {
continue
}
mac, vtep, err := n.driver.resolvePeer(n.id, neigh.IP)
if err != nil {
logrus.Errorf("could not resolve peer %q: %v", neigh.IP, err)
continue
}
if err := n.driver.peerAdd(n.id, "dummy", neigh.IP, mac, vtep, true); err != nil {
logrus.Errorf("could not add neighbor entry for missed peer: %v", err)
}
}
}
}
func (dev *vxlanDevice) processNeighMsg(msg syscall.NetlinkMessage, misses chan *netlink.Neigh) {
neigh, err := netlink.NeighDeserialize(msg.Data)
if err != nil {
log.Error("Failed to deserialize netlink ndmsg: %v", err)
return
}
if int(neigh.LinkIndex) != dev.link.Index {
return
}
if msg.Header.Type != syscall.RTM_GETNEIGH && msg.Header.Type != syscall.RTM_NEWNEIGH {
return
}
if !isNeighResolving(neigh.State) {
// misses come with NUD_STALE bit set
return
}
misses <- neigh
}
func (*nl) NeighDeserialize(data []byte) (*netlink.Neigh, error) {
return netlink.NeighDeserialize(data)
}