/
geneve.go
126 lines (109 loc) · 2.93 KB
/
geneve.go
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/*
* NETCAP - Traffic Analysis Framework
* Copyright (c) 2017 Philipp Mieden <dreadl0ck [at] protonmail [dot] ch>
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package types
import (
"encoding/hex"
"strconv"
"strings"
"github.com/prometheus/client_golang/prometheus"
)
var fieldsGeneve = []string{
"Timestamp",
"Version", // int32
"OptionsLength", // int32
"OAMPacket", // bool
"CriticalOption", // bool
"Protocol", // int32
"VNI", // uint32
"Options", // []*GeneveOption
"SrcIP",
"DstIP",
"SrcPort",
"DstPort",
}
func (i Geneve) CSVHeader() []string {
return filter(fieldsGeneve)
}
func (i Geneve) CSVRecord() []string {
var opts []string
for _, o := range i.Options {
opts = append(opts, o.ToString())
}
// prevent accessing nil pointer
if i.Context == nil {
i.Context = &PacketContext{}
}
return filter([]string{
formatTimestamp(i.Timestamp),
formatInt32(i.Version), // int32
formatInt32(i.OptionsLength), // int32
strconv.FormatBool(i.OAMPacket), // bool
strconv.FormatBool(i.CriticalOption), // bool
formatInt32(i.Protocol), // int32
formatUint32(i.VNI), // uint32
strings.Join(opts, ""), // []*GeneveOption
i.Context.SrcIP,
i.Context.DstIP,
i.Context.SrcPort,
i.Context.DstPort,
})
}
func (i Geneve) Time() string {
return i.Timestamp
}
func (i GeneveOption) ToString() string {
var b strings.Builder
b.WriteString(Begin)
b.WriteString(formatInt32(i.Class))
b.WriteString(Separator)
b.WriteString(formatInt32(i.Type))
b.WriteString(Separator)
b.WriteString(formatInt32(i.Flags))
b.WriteString(Separator)
b.WriteString(formatInt32(i.Length))
b.WriteString(Separator)
b.WriteString(hex.EncodeToString(i.Data))
b.WriteString(End)
return b.String()
}
func (a Geneve) JSON() (string, error) {
return jsonMarshaler.MarshalToString(&a)
}
var geneveMetric = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: strings.ToLower(Type_NC_Geneve.String()),
Help: Type_NC_Geneve.String() + " audit records",
},
fieldsGeneve[1:],
)
func init() {
prometheus.MustRegister(geneveMetric)
}
func (a Geneve) Inc() {
geneveMetric.WithLabelValues(a.CSVRecord()[1:]...).Inc()
}
func (a *Geneve) SetPacketContext(ctx *PacketContext) {
a.Context = ctx
}
func (a Geneve) Src() string {
if a.Context != nil {
return a.Context.SrcIP
}
return ""
}
func (a Geneve) Dst() string {
if a.Context != nil {
return a.Context.DstIP
}
return ""
}