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dataplane_passthru.go
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dataplane_passthru.go
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// Copyright (c) 2016-2017 Tigera, Inc. All rights reserved.
//
// 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 calc
import (
log "github.com/Sirupsen/logrus"
"github.com/projectcalico/felix/dispatcher"
"github.com/projectcalico/libcalico-go/lib/backend/api"
"github.com/projectcalico/libcalico-go/lib/backend/model"
"github.com/projectcalico/libcalico-go/lib/net"
)
// DataplanePassthru passes through some datamodel updates to the dataplane layer, removing some
// duplicates along the way. It maps OnUpdate() calls to dedicated method calls for consistency
// with the rest of the dataplane API.
type DataplanePassthru struct {
callbacks passthruCallbacks
hostIPs map[string]*net.IP
}
func NewDataplanePassthru(callbacks passthruCallbacks) *DataplanePassthru {
return &DataplanePassthru{
callbacks: callbacks,
hostIPs: map[string]*net.IP{},
}
}
func (h *DataplanePassthru) RegisterWith(dispatcher *dispatcher.Dispatcher) {
dispatcher.Register(model.HostIPKey{}, h.OnUpdate)
dispatcher.Register(model.IPPoolKey{}, h.OnUpdate)
}
func (h *DataplanePassthru) OnUpdate(update api.Update) (filterOut bool) {
switch key := update.Key.(type) {
case model.HostIPKey:
hostname := key.Hostname
if update.Value == nil {
log.WithField("update", update).Debug("Passing-through HostIP deletion")
delete(h.hostIPs, hostname)
h.callbacks.OnHostIPRemove(hostname)
} else {
ip := update.Value.(*net.IP)
oldIP := h.hostIPs[hostname]
// libcalico-go's IP struct wraps a standard library IP struct. To
// compare two IPs, we need to unwrap them and use Equal() since standard
// library IPs have multiple, equivalent, representations.
if oldIP != nil && ip.IP.Equal(oldIP.IP) {
log.WithField("update", update).Debug("Ignoring duplicate HostIP update")
return
}
log.WithField("update", update).Debug("Passing-through HostIP update")
h.hostIPs[hostname] = ip
h.callbacks.OnHostIPUpdate(hostname, ip)
}
case model.IPPoolKey:
if update.Value == nil {
log.WithField("update", update).Debug("Passing-through IPPool deletion")
h.callbacks.OnIPPoolRemove(key)
} else {
log.WithField("update", update).Debug("Passing-through IPPool update")
pool := update.Value.(*model.IPPool)
h.callbacks.OnIPPoolUpdate(key, pool)
}
}
return
}