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puntplugin.go
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puntplugin.go
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// Copyright (c) 2018 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.
//go:generate descriptor-adapter --descriptor-name IPPuntRedirect --value-type *vpp_punt.IPRedirect --import "github.com/ligato/vpp-agent/api/models/vpp/punt" --output-dir "descriptor"
//go:generate descriptor-adapter --descriptor-name PuntToHost --value-type *vpp_punt.ToHost --import "github.com/ligato/vpp-agent/api/models/vpp/punt" --output-dir "descriptor"
//go:generate descriptor-adapter --descriptor-name PuntException --value-type *vpp_punt.Exception --import "github.com/ligato/vpp-agent/api/models/vpp/punt" --output-dir "descriptor"
package puntplugin
import (
"strings"
govppapi "git.fd.io/govpp.git/api"
"github.com/ligato/cn-infra/datasync"
"github.com/ligato/cn-infra/health/statuscheck"
"github.com/ligato/cn-infra/infra"
"github.com/pkg/errors"
vpp_punt "github.com/ligato/vpp-agent/api/models/vpp/punt"
"github.com/ligato/vpp-agent/pkg/models"
"github.com/ligato/vpp-agent/plugins/govppmux"
kvs "github.com/ligato/vpp-agent/plugins/kvscheduler/api"
"github.com/ligato/vpp-agent/plugins/vpp/ifplugin"
"github.com/ligato/vpp-agent/plugins/vpp/puntplugin/descriptor"
"github.com/ligato/vpp-agent/plugins/vpp/puntplugin/descriptor/adapter"
"github.com/ligato/vpp-agent/plugins/vpp/puntplugin/vppcalls"
_ "github.com/ligato/vpp-agent/plugins/vpp/puntplugin/vppcalls/vpp1904"
_ "github.com/ligato/vpp-agent/plugins/vpp/puntplugin/vppcalls/vpp1908"
_ "github.com/ligato/vpp-agent/plugins/vpp/puntplugin/vppcalls/vpp2001_324"
_ "github.com/ligato/vpp-agent/plugins/vpp/puntplugin/vppcalls/vpp2001_379"
)
// PuntPlugin configures VPP punt to host or unix domain socket entries and IP redirect entries using GoVPP.
type PuntPlugin struct {
Deps
// GoVPP
vppCh govppapi.Channel
// handler
puntHandler vppcalls.PuntVppAPI
// descriptors
ipRedirectDescriptor *descriptor.IPRedirectDescriptor
toHostDescriptor *descriptor.PuntToHostDescriptor
puntExceptionDescriptor *descriptor.PuntExceptionDescriptor
}
// Deps lists dependencies of the punt plugin.
type Deps struct {
infra.PluginDeps
KVScheduler kvs.KVScheduler
GoVppmux govppmux.API
IfPlugin ifplugin.API
PublishState datasync.KeyProtoValWriter // optional
StatusCheck statuscheck.PluginStatusWriter // optional
}
// Init registers STN-related descriptors.
func (p *PuntPlugin) Init() (err error) {
// GoVPP channels
if p.vppCh, err = p.GoVppmux.NewAPIChannel(); err != nil {
return errors.Errorf("failed to create GoVPP API channel: %v", err)
}
// init punt handler
p.puntHandler = vppcalls.CompatiblePuntVppHandler(p.vppCh, p.IfPlugin.GetInterfaceIndex(), p.Log)
// init and register IP punt redirect
p.ipRedirectDescriptor = descriptor.NewIPRedirectDescriptor(p.puntHandler, p.Log)
ipRedirectDescriptor := adapter.NewIPPuntRedirectDescriptor(p.ipRedirectDescriptor.GetDescriptor())
err = p.KVScheduler.RegisterKVDescriptor(ipRedirectDescriptor)
if err != nil {
return err
}
// init and register punt descriptor
p.toHostDescriptor = descriptor.NewPuntToHostDescriptor(p.puntHandler, p.Log)
toHostDescriptor := adapter.NewPuntToHostDescriptor(p.toHostDescriptor.GetDescriptor())
err = p.KVScheduler.RegisterKVDescriptor(toHostDescriptor)
if err != nil {
return err
}
// init and register punt exception descriptor
p.puntExceptionDescriptor = descriptor.NewPuntExceptionDescriptor(p.puntHandler, p.Log)
exceptionDescriptor := adapter.NewPuntExceptionDescriptor(p.puntExceptionDescriptor.GetDescriptor())
err = p.KVScheduler.RegisterKVDescriptor(exceptionDescriptor)
if err != nil {
return err
}
// FIXME: temporary workaround for publishing registered sockets
p.toHostDescriptor.RegisterSocketFn = func(register bool, toHost *vpp_punt.ToHost, socketPath string) {
if p.PublishState == nil {
return
}
key := strings.Replace(models.Key(toHost), "config/", "status/", -1)
if register {
puntToHost := *toHost
puntToHost.SocketPath = socketPath
if err := p.PublishState.Put(key, &puntToHost, datasync.WithClientLifetimeTTL()); err != nil {
p.Log.Errorf("publishing registered punt socket failed: %v", err)
}
} else {
if err := p.PublishState.Put(key, nil); err != nil {
p.Log.Errorf("publishing unregistered punt socket failed: %v", err)
}
}
}
p.puntExceptionDescriptor.RegisterSocketFn = func(register bool, puntExc *vpp_punt.Exception, socketPath string) {
if p.PublishState == nil {
return
}
key := strings.Replace(models.Key(puntExc), "config/", "status/", -1)
if register {
punt := *puntExc
punt.SocketPath = socketPath
if err := p.PublishState.Put(key, &punt, datasync.WithClientLifetimeTTL()); err != nil {
p.Log.Errorf("publishing registered punt exception socket failed: %v", err)
}
} else {
if err := p.PublishState.Put(key, nil); err != nil {
p.Log.Errorf("publishing unregistered punt exception socket failed: %v", err)
}
}
}
return nil
}
// AfterInit registers plugin with StatusCheck.
func (p *PuntPlugin) AfterInit() error {
if p.StatusCheck != nil {
p.StatusCheck.Register(p.PluginName, nil)
}
return nil
}