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cisco_discovery.go
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cisco_discovery.go
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/*
* NETCAP - Traffic Analysis Framework
* Copyright (c) 2017-2020 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"
"github.com/dreadl0ck/netcap/encoder"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
)
const (
fieldTTL = "TTL"
fieldChecksum = "Checksum"
fieldValues = "Values"
)
var fieldsCiscoDiscovery = []string{
fieldTimestamp,
fieldVersion, // int32
fieldTTL, // int32
fieldChecksum, // int32
fieldValues, // []*CiscoDiscoveryValue
}
// CSVHeader returns the CSV header for the audit record.
func (cd *CiscoDiscovery) CSVHeader() []string {
return filter(fieldsCiscoDiscovery)
}
// CSVRecord returns the CSV record for the audit record.
func (cd *CiscoDiscovery) CSVRecord() []string {
values := make([]string, len(cd.Values))
for i, v := range cd.Values {
values[i] = v.toString()
}
return filter([]string{
formatTimestamp(cd.Timestamp),
formatInt32(cd.Version), // int32
formatInt32(cd.TTL), // int32
formatInt32(cd.Checksum), // int32
join(values...), // []*CiscoDiscoveryValue
})
}
// Time returns the timestamp associated with the audit record.
func (cd *CiscoDiscovery) Time() int64 {
return cd.Timestamp
}
func (v CiscoDiscoveryValue) toString() string {
var b strings.Builder
b.WriteString(StructureBegin)
b.WriteString(formatInt32(v.Type))
b.WriteString(FieldSeparator)
b.WriteString(formatInt32(v.Length))
b.WriteString(FieldSeparator)
b.WriteString(hex.EncodeToString(v.Value))
b.WriteString(StructureEnd)
return b.String()
}
// JSON returns the JSON representation of the audit record.
func (cd *CiscoDiscovery) JSON() (string, error) {
// convert unix timestamp from nano to millisecond precision for elastic
cd.Timestamp /= int64(time.Millisecond)
return jsonMarshaler.MarshalToString(cd)
}
var ciscoDiscoveryMetric = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: strings.ToLower(Type_NC_CiscoDiscovery.String()),
Help: Type_NC_CiscoDiscovery.String() + " audit records",
},
fieldsCiscoDiscovery[1:],
)
// Inc increments the metrics for the audit record.
func (cd *CiscoDiscovery) Inc() {
ciscoDiscoveryMetric.WithLabelValues(cd.CSVRecord()[1:]...).Inc()
}
// SetPacketContext sets the associated packet context for the audit record.
func (cd *CiscoDiscovery) SetPacketContext(*PacketContext) {}
// Src TODO.
// Src returns the source address of the audit record.
func (cd *CiscoDiscovery) Src() string {
return ""
}
// Dst returns the destination address of the audit record.
func (cd *CiscoDiscovery) Dst() string {
return ""
}
var ciscoDiscoveryEncoder = encoder.NewValueEncoder()
// Encode will encode categorical values and normalize according to configuration
func (cd *CiscoDiscovery) Encode() []string {
return filter([]string{
ciscoDiscoveryEncoder.Int64(fieldTimestamp, cd.Timestamp),
ciscoDiscoveryEncoder.Int32(fieldVersion, cd.Version), // int32
ciscoDiscoveryEncoder.Int32(fieldTTL, cd.TTL), // int32
ciscoDiscoveryEncoder.Int32(fieldChecksum, cd.Checksum), // int32
// TODO: flatten
//join(values...), // []*CiscoDiscoveryValue
})
}
// Analyze will invoke the configured analyzer for the audit record and return a score.
func (cd *CiscoDiscovery) Analyze() {
}
// NetcapType returns the type of the current audit record
func (cd *CiscoDiscovery) NetcapType() Type {
return Type_NC_CiscoDiscovery
}