func (o *Overlay) deletePolicies(policies map[string]netlink.XfrmPolicy) error {
var lastErr error
for _, policy := range policies {
if err := netlink.XfrmPolicyDel(&policy); err != nil {
logrus.Errorf("Failed to delete policy: %+v, %v", policy, err)
lastErr = err
} else {
logrus.Infof("Deleted policy: %+v", policy)
}
}
return lastErr
}
func destroyTunnel(dst net.IP) (net.IP, error) {
// Determine the src and dst ips for the tunnel
key := dst.String()
tunnel := getTunnel(dst.String())
if tunnel == nil {
s := fmt.Sprintf("Failed to find tunnel to dst %s", dst)
glog.Errorf(s)
return nil, fmt.Errorf(s)
}
src := opts.src
srcNet := netlink.NewIPNet(tunnel.Src)
dstNet := netlink.NewIPNet(tunnel.Dst)
glog.Infof("Destroying Tunnel: %v, %v", tunnel.Src, tunnel.Dst)
for _, state := range getStates(tunnel.Reqid, src, dst, 0, 0, nil, nil) {
// crate xfrm state rules
err := netlink.XfrmStateDel(&state)
if err != nil {
glog.Errorf("Failed to delete state %v: %v", state, err)
}
}
for _, policy := range getPolicies(tunnel.Reqid, src, dst, srcNet, dstNet) {
// create xfrm policy rules
err := netlink.XfrmPolicyDel(&policy)
if err != nil {
glog.Errorf("Failed to delete policy %v: %v", policy, err)
}
}
index, err := getLinkIndex(src)
if err != nil {
glog.Errorf("Failed to get link for address: %v", err)
} else {
// del source route to tunnel ips device
route := &netlink.Route{
Scope: netlink.SCOPE_LINK,
Src: tunnel.Src,
Dst: dstNet,
LinkIndex: index,
}
err = netlink.RouteDel(route)
if err != nil {
glog.Errorf("Failed to delete route %v: %v", route, err)
}
}
// del IP address to loopback device
lo, err := netlink.LinkByName("lo")
if err != nil {
glog.Errorf("Failed to get loopback device: %v", err)
} else {
err = netlink.AddrDel(lo, &netlink.Addr{IPNet: srcNet})
if err != nil {
glog.Errorf("Failed to delete %v from loopback: %v", tunnel.Src, err)
}
}
if tunnel.SrcPort != 0 {
deleteEncapListener(getListener(key))
releasePort(tunnel.SrcPort)
}
unreserveIP(tunnel.Src)
unreserveIP(tunnel.Dst)
removeTunnel(key)
glog.Infof("Finished destroying tunnel: %v, %v", tunnel.Src, tunnel.Dst)
return opts.external, nil
}