mirror of
https://github.com/openziti/ziti.git
synced 2026-10-12 15:28:05 +00:00
Paul Lorenz
124 lines
3.1 KiB
Go
124 lines
3.1 KiB
Go
/*
|
|
Copyright NetFoundry Inc.
|
|
|
|
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
|
|
|
|
https://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 handler_link
|
|
|
|
import (
|
|
"github.com/ef-ds/deque"
|
|
"github.com/michaelquigley/pfxlog"
|
|
"github.com/openziti/channel/v2"
|
|
"github.com/openziti/ziti/router/forwarder"
|
|
"github.com/openziti/ziti/router/xgress"
|
|
"github.com/openziti/ziti/router/xlink"
|
|
"sync/atomic"
|
|
)
|
|
|
|
type ackHandler struct {
|
|
link xlink.Xlink
|
|
forwarder *forwarder.Forwarder
|
|
acks *deque.Deque
|
|
ackIngest chan *xgress.Acknowledgement
|
|
ackForward chan *xgress.Acknowledgement
|
|
acksQueueSize int64
|
|
closeNotify <-chan struct{}
|
|
}
|
|
|
|
func newAckHandler(link xlink.Xlink, forwarder *forwarder.Forwarder, closeNotify <-chan struct{}) *ackHandler {
|
|
result := &ackHandler{
|
|
link: link,
|
|
forwarder: forwarder,
|
|
acks: deque.New(),
|
|
ackIngest: make(chan *xgress.Acknowledgement, 16),
|
|
ackForward: make(chan *xgress.Acknowledgement, 1),
|
|
closeNotify: closeNotify,
|
|
}
|
|
|
|
go result.ackIngester()
|
|
go result.ackForwarder()
|
|
|
|
forwarder.MetricsRegistry().FuncGauge("xgress.acks.queue_size", func() int64 {
|
|
return atomic.LoadInt64(&result.acksQueueSize)
|
|
})
|
|
|
|
return result
|
|
}
|
|
|
|
func (self *ackHandler) ContentType() int32 {
|
|
return xgress.ContentTypeAcknowledgementType
|
|
}
|
|
|
|
func (self *ackHandler) HandleReceive(msg *channel.Message, ch channel.Channel) {
|
|
if ack, err := xgress.UnmarshallAcknowledgement(msg); err == nil {
|
|
select {
|
|
case self.ackIngest <- ack:
|
|
case <-self.closeNotify:
|
|
}
|
|
} else {
|
|
pfxlog.ContextLogger(ch.Label()).
|
|
WithField("linkId", self.link.Id()).
|
|
WithField("routerId", self.link.DestinationId()).
|
|
WithError(err).
|
|
Error("error unmarshalling ack")
|
|
}
|
|
}
|
|
|
|
func (self *ackHandler) ackIngester() {
|
|
var next *xgress.Acknowledgement
|
|
for {
|
|
if next == nil {
|
|
if val, _ := self.acks.PopFront(); val != nil {
|
|
next = val.(*xgress.Acknowledgement)
|
|
}
|
|
}
|
|
|
|
if next == nil {
|
|
select {
|
|
case ack := <-self.ackIngest:
|
|
self.acks.PushBack(ack)
|
|
case <-self.closeNotify:
|
|
return
|
|
}
|
|
} else {
|
|
select {
|
|
case ack := <-self.ackIngest:
|
|
self.acks.PushBack(ack)
|
|
case self.ackForward <- next:
|
|
next = nil
|
|
case <-self.closeNotify:
|
|
return
|
|
}
|
|
}
|
|
atomic.StoreInt64(&self.acksQueueSize, int64(self.acks.Len()))
|
|
}
|
|
}
|
|
|
|
func (self *ackHandler) ackForwarder() {
|
|
logger := pfxlog.Logger()
|
|
for {
|
|
select {
|
|
case ack := <-self.ackForward:
|
|
if err := self.forwarder.ForwardAcknowledgement(xgress.Address(self.link.Id()), ack); err != nil {
|
|
logger.WithField("linkId", self.link.Id()).
|
|
WithField("routerId", self.link.DestinationId()).
|
|
WithError(err).
|
|
Debug("unable to forward acknowledgement")
|
|
}
|
|
case <-self.closeNotify:
|
|
return
|
|
}
|
|
}
|
|
}
|