Example #1
0
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)
			}
		}
	}
}
Example #2
0
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)
			}
		}
	}
}
Example #3
0
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)
}