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add wireguard remote mechanism for vppagent forwarder
Signed-off-by: Denis Tingajkin <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| // Copyright (c) 2020 Doc.ai and/or its affiliates. | ||
| // | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
| // | ||
| // 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. | ||
|
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| package vppagent | ||
|
|
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| import ( | ||
| "context" | ||
| "fmt" | ||
|
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| sdk "github.com/networkservicemesh/networkservicemesh/forwarder/sdk/wireguard" | ||
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| "github.com/sirupsen/logrus" | ||
| "github.com/vishvananda/netlink" | ||
| vpp_l2 "go.ligato.io/vpp-agent/v3/proto/ligato/vpp/l2" | ||
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| vpp_interfaces "go.ligato.io/vpp-agent/v3/proto/ligato/vpp/interfaces" | ||
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| "github.com/networkservicemesh/networkservicemesh/controlplane/api/connection" | ||
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| "go.ligato.io/vpp-agent/v3/proto/ligato/vpp" | ||
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| "github.com/networkservicemesh/networkservicemesh/forwarder/kernel-forwarder/pkg/kernelforwarder/remote" | ||
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| "go.ligato.io/vpp-agent/v3/proto/ligato/configurator" | ||
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| "github.com/networkservicemesh/networkservicemesh/controlplane/api/connection/mechanisms/wireguard" | ||
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| "github.com/golang/protobuf/ptypes/empty" | ||
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| "github.com/networkservicemesh/networkservicemesh/controlplane/api/crossconnect" | ||
| "github.com/networkservicemesh/networkservicemesh/forwarder/api/forwarder" | ||
| ) | ||
|
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| type wgInterfaces struct{ *sdk.DeviceManager } | ||
|
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| func (w *wgInterfaces) Request(ctx context.Context, crossConnect *crossconnect.CrossConnect) (*crossconnect.CrossConnect, error) { | ||
| if crossConnect.GetSource().GetMechanism().GetType() == wireguard.MECHANISM || | ||
| crossConnect.GetDestination().GetMechanism().GetType() == wireguard.MECHANISM { | ||
| c := DataChange(ctx) | ||
| if crossConnect.GetSource().IsRemote() && !crossConnect.GetDestination().IsRemote() { | ||
| err := w.appendInterfaces(c, crossConnect.Id, crossConnect.GetSource(), remote.INCOMING) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } else if !crossConnect.GetSource().IsRemote() && crossConnect.GetDestination().IsRemote() { | ||
| err := w.appendInterfaces(c, crossConnect.Id, crossConnect.GetDestination(), remote.OUTGOING) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
| } | ||
| next := Next(ctx) | ||
| if next == nil { | ||
| return crossConnect, nil | ||
| } | ||
| return next.Request(ctx, crossConnect) | ||
| } | ||
|
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| func (w *wgInterfaces) Close(ctx context.Context, crossConn *crossconnect.CrossConnect) (*empty.Empty, error) { | ||
| if crossConn.GetLocalSource().GetMechanism().GetType() == wireguard.MECHANISM || | ||
| crossConn.GetLocalDestination().GetMechanism().GetType() == wireguard.MECHANISM { | ||
| if crossConn.GetSource().IsRemote() && !crossConn.GetDestination().IsRemote() { | ||
| w.DeleteWireguardDevice(w.getWGDeviceName(crossConn.Id, false)) | ||
| } else if !crossConn.GetSource().IsRemote() && crossConn.GetDestination().IsRemote() { | ||
| w.DeleteWireguardDevice(w.getWGDeviceName(crossConn.Id, true)) | ||
| } | ||
| } | ||
| next := Next(ctx) | ||
| if next == nil { | ||
| return new(empty.Empty), nil | ||
| } | ||
| return next.Close(ctx, crossConn) | ||
| } | ||
|
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| // NewWgInterfaces creates chain element for manage wirguard mechanism cases | ||
| func NewWgInterfaces() forwarder.ForwarderServer { | ||
| return &wgInterfaces{ | ||
| DeviceManager: sdk.NewWireguardDeviceManager(true), | ||
| } | ||
| } | ||
|
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| func (w *wgInterfaces) appendInterfaces(rv *configurator.Config, id string, r *connection.Connection, dst uint8) error { | ||
| name := "SRC-" + id | ||
| if dst == remote.INCOMING { | ||
| name = "DST-" + id | ||
| } | ||
| wgName := w.getWGDeviceName(id, dst != remote.INCOMING) | ||
| vppWgName := "VPP-" + wgName | ||
| err := w.CreateWireguardDevice(wgName, r, dst == remote.INCOMING) | ||
| if err != nil { | ||
| logrus.Errorf("common: failed to create %q, %v", wgName, err) | ||
| return err | ||
| } | ||
| link, err := netlink.LinkByName(wgName) | ||
| if err != nil { | ||
| logrus.Errorf("common: failed to lookup %q, %v", wgName, err) | ||
| return err | ||
| } | ||
| if err = netlink.LinkSetUp(link); err != nil { | ||
| logrus.Errorf("common: failed to bring %q up: %v", wgName, err) | ||
| return err | ||
| } | ||
| if err != nil { | ||
| w.DeleteWireguardDevice(wgName) | ||
| return err | ||
| } | ||
| rv.VppConfig.Interfaces = append(rv.VppConfig.Interfaces, &vpp.Interface{ | ||
| Name: vppWgName, | ||
| Type: vpp_interfaces.Interface_AF_PACKET, | ||
| Link: &vpp_interfaces.Interface_Afpacket{ | ||
| Afpacket: &vpp_interfaces.AfpacketLink{ | ||
| HostIfName: wgName, | ||
| }, | ||
| }, | ||
| Enabled: true, | ||
| }) | ||
| rv.VppConfig.XconnectPairs = append(rv.VppConfig.XconnectPairs, &vpp_l2.XConnectPair{ | ||
| ReceiveInterface: vppWgName, | ||
| TransmitInterface: name, | ||
| }) | ||
| rv.VppConfig.XconnectPairs = append(rv.VppConfig.XconnectPairs, &vpp_l2.XConnectPair{ | ||
| ReceiveInterface: name, | ||
| TransmitInterface: vppWgName, | ||
| }) | ||
| return nil | ||
| } | ||
|
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| func (w *wgInterfaces) getWGDeviceName(id string, src bool) string { | ||
| prefix := "SRC" | ||
| if !src { | ||
| prefix = "DST" | ||
| } | ||
| return fmt.Sprintf("WG-%v-%v", prefix, id) | ||
| } |
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