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ipsecah.go
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ipsecah.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 (
"github.com/dreadl0ck/netcap/encoder"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
)
const (
fieldReserved = "Reserved"
fieldSPI = "SPI"
fieldAuthenticationData = "AuthenticationData"
)
var fieldsIPSecAH = []string{
fieldTimestamp,
fieldReserved,
fieldSPI,
fieldSeq,
fieldSrcIP, // string
fieldDstIP, // string
}
// CSVHeader returns the CSV header for the audit record.
func (a *IPSecAH) CSVHeader() []string {
return filter(fieldsIPSecAH)
}
// CSVRecord returns the CSV record for the audit record.
func (a *IPSecAH) CSVRecord() []string {
return filter([]string{
formatTimestamp(a.Timestamp),
formatInt32(a.Reserved),
formatInt32(a.SPI),
formatInt32(a.Seq),
a.SrcIP,
a.DstIP,
})
}
// Time returns the timestamp associated with the audit record.
func (a *IPSecAH) Time() int64 {
return a.Timestamp
}
// JSON returns the JSON representation of the audit record.
func (a *IPSecAH) JSON() (string, error) {
// convert unix timestamp from nano to millisecond precision for elastic
a.Timestamp /= int64(time.Millisecond)
return jsonMarshaler.MarshalToString(a)
}
var ipSecAhMetric = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: strings.ToLower(Type_NC_IPSecAH.String()),
Help: Type_NC_IPSecAH.String() + " audit records",
},
fieldsIPSecAH[1:],
)
// Inc increments the metrics for the audit record.
func (a *IPSecAH) Inc() {
ipSecAhMetric.WithLabelValues(a.CSVRecord()[1:]...).Inc()
}
// SetPacketContext sets the associated packet context for the audit record.
func (a *IPSecAH) SetPacketContext(ctx *PacketContext) {
a.SrcIP = ctx.SrcIP
a.DstIP = ctx.DstIP
}
// Src returns the source address of the audit record.
func (a *IPSecAH) Src() string {
return a.SrcIP
}
// Dst returns the destination address of the audit record.
func (a *IPSecAH) Dst() string {
return a.DstIP
}
var ipsecahEncoder = encoder.NewValueEncoder()
// Encode will encode categorical values and normalize according to configuration
func (a *IPSecAH) Encode() []string {
return filter([]string{
ipsecahEncoder.Int64(fieldTimestamp, a.Timestamp),
ipsecahEncoder.Int32(fieldReserved, a.Reserved),
ipsecahEncoder.Int32(fieldSPI, a.SPI),
ipsecahEncoder.Int32(fieldSeq, a.Seq),
ipsecahEncoder.String(fieldSrcIP, a.SrcIP),
ipsecahEncoder.String(fieldDstIP, a.DstIP),
})
}
// Analyze will invoke the configured analyzer for the audit record and return a score.
func (a *IPSecAH) Analyze() {}
// NetcapType returns the type of the current audit record
func (a *IPSecAH) NetcapType() Type {
return Type_NC_IPSecAH
}