/
handler.go
86 lines (71 loc) · 2.16 KB
/
handler.go
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// Copyright 2019 Authors of Hubble
//
// 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 tcp
import (
flowpb "github.com/cilium/cilium/api/v1/flow"
v1 "github.com/cilium/cilium/pkg/hubble/api/v1"
"github.com/cilium/cilium/pkg/hubble/metrics/api"
"github.com/prometheus/client_golang/prometheus"
)
type tcpHandler struct {
tcpFlags *prometheus.CounterVec
context *api.ContextOptions
}
func (h *tcpHandler) Init(registry *prometheus.Registry, options api.Options) error {
c, err := api.ParseContextOptions(options)
if err != nil {
return err
}
h.context = c
labels := []string{"flag", "family"}
labels = append(labels, h.context.GetLabelNames()...)
h.tcpFlags = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: api.DefaultPrometheusNamespace,
Name: "tcp_flags_total",
Help: "TCP flag occurences",
}, labels)
registry.MustRegister(h.tcpFlags)
return nil
}
func (h *tcpHandler) Status() string {
return h.context.Status()
}
func (h *tcpHandler) ProcessFlow(flow v1.Flow) {
if flow.GetVerdict() != flowpb.Verdict_FORWARDED || flow.GetL4() == nil {
return
}
ip := flow.GetIP()
tcp := flow.GetL4().GetTCP()
if ip == nil || tcp == nil || tcp.Flags == nil {
return
}
labels := append([]string{"", ip.IpVersion.String()}, h.context.GetLabelValues(flow)...)
if tcp.Flags.FIN {
labels[0] = "FIN"
h.tcpFlags.WithLabelValues(labels...).Inc()
}
if tcp.Flags.SYN {
if tcp.Flags.ACK {
labels[0] = "SYN-ACK"
h.tcpFlags.WithLabelValues(labels...).Inc()
} else {
labels[0] = "SYN"
h.tcpFlags.WithLabelValues(labels...).Inc()
}
}
if tcp.Flags.RST {
labels[0] = "RST"
h.tcpFlags.WithLabelValues(labels...).Inc()
}
}