mirror of https://github.com/k3s-io/k3s
102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
// Copyright 2017 flannel authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
// +build !windows
|
|
|
|
package ipsec
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"net"
|
|
"syscall"
|
|
|
|
"github.com/flannel-io/flannel/subnet"
|
|
"github.com/vishvananda/netlink"
|
|
log "k8s.io/klog"
|
|
)
|
|
|
|
func AddXFRMPolicy(myLease, remoteLease *subnet.Lease, dir netlink.Dir, reqID int) error {
|
|
src := myLease.Subnet.ToIPNet()
|
|
|
|
dst := remoteLease.Subnet.ToIPNet()
|
|
|
|
policy := &netlink.XfrmPolicy{
|
|
Src: src,
|
|
Dst: dst,
|
|
Dir: dir,
|
|
}
|
|
|
|
tunnelLeft := myLease.Attrs.PublicIP.ToIP()
|
|
tunnelRight := remoteLease.Attrs.PublicIP.ToIP()
|
|
|
|
tmpl := netlink.XfrmPolicyTmpl{
|
|
Src: tunnelLeft,
|
|
Dst: tunnelRight,
|
|
Proto: netlink.XFRM_PROTO_ESP,
|
|
Mode: netlink.XFRM_MODE_TUNNEL,
|
|
Reqid: reqID,
|
|
}
|
|
|
|
policy.Tmpls = append(policy.Tmpls, tmpl)
|
|
|
|
if existingPolicy, err := netlink.XfrmPolicyGet(policy); err != nil {
|
|
if errors.Is(err, syscall.ENOENT) {
|
|
log.Infof("Adding ipsec policy: %+v", tmpl)
|
|
if err := netlink.XfrmPolicyAdd(policy); err != nil {
|
|
return fmt.Errorf("error adding policy: %+v err: %v", policy, err)
|
|
}
|
|
} else {
|
|
return fmt.Errorf("error getting policy: %+v err: %v", policy, err)
|
|
}
|
|
} else {
|
|
log.Infof("Updating ipsec policy %+v with %+v", existingPolicy, policy)
|
|
if err := netlink.XfrmPolicyUpdate(policy); err != nil {
|
|
return fmt.Errorf("error updating policy: %+v err: %v", policy, err)
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func DeleteXFRMPolicy(localSubnet, remoteSubnet *net.IPNet, localPublicIP, remotePublicIP net.IP, dir netlink.Dir, reqID int) error {
|
|
src := localSubnet
|
|
dst := remoteSubnet
|
|
|
|
policy := netlink.XfrmPolicy{
|
|
Src: src,
|
|
Dst: dst,
|
|
Dir: dir,
|
|
}
|
|
|
|
tunnelLeft := localPublicIP
|
|
tunnelRight := remotePublicIP
|
|
|
|
tmpl := netlink.XfrmPolicyTmpl{
|
|
Src: tunnelLeft,
|
|
Dst: tunnelRight,
|
|
Proto: netlink.XFRM_PROTO_ESP,
|
|
Mode: netlink.XFRM_MODE_TUNNEL,
|
|
Reqid: reqID,
|
|
}
|
|
|
|
log.Infof("Deleting ipsec policy: %+v", tmpl)
|
|
|
|
policy.Tmpls = append(policy.Tmpls, tmpl)
|
|
|
|
if err := netlink.XfrmPolicyDel(&policy); err != nil {
|
|
return fmt.Errorf("error deleting policy: %+v err: %v", policy, err)
|
|
}
|
|
|
|
return nil
|
|
}
|