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ipsec_vppcalls.go
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ipsec_vppcalls.go
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// Copyright (c) 2019 Cisco and/or its affiliates.
//
// 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.
package vpp1908
import (
"encoding/hex"
"fmt"
"net"
interfaces "github.com/ligato/vpp-agent/api/models/vpp/interfaces"
api "github.com/ligato/vpp-agent/plugins/vpp/binapi/vpp1908/ipsec"
)
// AddIPSecTunnelInterface adds a new IPSec tunnel interface.
func (h *InterfaceVppHandler) AddIPSecTunnelInterface(ifName string, ipSecLink *interfaces.IPSecLink) (uint32, error) {
return h.tunnelIfAddDel(ifName, ipSecLink, true)
}
// DeleteIPSecTunnelInterface removes existing IPSec tunnel interface.
func (h *InterfaceVppHandler) DeleteIPSecTunnelInterface(ifName string, ipSecLink *interfaces.IPSecLink) error {
// Note: ifIdx is not used now, tunnel should be matched based on parameters
_, err := h.tunnelIfAddDel(ifName, ipSecLink, false)
return err
}
func (h *InterfaceVppHandler) tunnelIfAddDel(ifName string, ipSecLink *interfaces.IPSecLink, isAdd bool) (uint32, error) {
localCryptoKey, err := hex.DecodeString(ipSecLink.LocalCryptoKey)
if err != nil {
return 0, err
}
remoteCryptoKey, err := hex.DecodeString(ipSecLink.RemoteCryptoKey)
if err != nil {
return 0, err
}
localIntegKey, err := hex.DecodeString(ipSecLink.LocalIntegKey)
if err != nil {
return 0, err
}
remoteIntegKey, err := hex.DecodeString(ipSecLink.RemoteIntegKey)
if err != nil {
return 0, err
}
localIP, err := ipToIPSecAddress(ipSecLink.LocalIp)
if err != nil {
return 0, err
}
remoteIP, err := ipToIPSecAddress(ipSecLink.RemoteIp)
if err != nil {
return 0, err
}
req := &api.IpsecTunnelIfAddDel{
IsAdd: boolToUint(isAdd),
Esn: boolToUint(ipSecLink.Esn),
AntiReplay: boolToUint(ipSecLink.AntiReplay),
LocalIP: localIP,
RemoteIP: remoteIP,
LocalSpi: ipSecLink.LocalSpi,
RemoteSpi: ipSecLink.RemoteSpi,
CryptoAlg: uint8(ipSecLink.CryptoAlg),
LocalCryptoKey: localCryptoKey,
LocalCryptoKeyLen: uint8(len(localCryptoKey)),
RemoteCryptoKey: remoteCryptoKey,
RemoteCryptoKeyLen: uint8(len(remoteCryptoKey)),
IntegAlg: uint8(ipSecLink.IntegAlg),
LocalIntegKey: localIntegKey,
LocalIntegKeyLen: uint8(len(localIntegKey)),
RemoteIntegKey: remoteIntegKey,
RemoteIntegKeyLen: uint8(len(remoteIntegKey)),
UDPEncap: boolToUint(ipSecLink.EnableUdpEncap),
}
reply := &api.IpsecTunnelIfAddDelReply{}
if err := h.callsChannel.SendRequest(req).ReceiveReply(reply); err != nil {
return 0, err
}
return reply.SwIfIndex, nil
}
func ipToIPSecAddress(ipstr string) (addr api.Address, err error) {
netIP := net.ParseIP(ipstr)
if netIP == nil {
return api.Address{}, fmt.Errorf("invalid IP: %q", ipstr)
}
if ip4 := netIP.To4(); ip4 == nil {
addr.Af = api.ADDRESS_IP6
var ip6addr api.IP6Address
copy(ip6addr[:], netIP.To16())
addr.Un.SetIP6(ip6addr)
} else {
addr.Af = api.ADDRESS_IP4
var ip4addr api.IP4Address
copy(ip4addr[:], ip4)
addr.Un.SetIP4(ip4addr)
}
return
}