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ip6hop.go
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ip6hop.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"
"strings"
"github.com/prometheus/client_golang/prometheus"
)
var fieldsIPv6HopByHop = []string{
"Timestamp",
"Options",
"SrcIP", // string
"DstIP", // string
}
func (l IPv6HopByHop) CSVHeader() []string {
return filter(fieldsIPv6HopByHop)
}
func (l IPv6HopByHop) CSVRecord() []string {
opts := make([]string, len(l.Options))
for i, v := range l.Options {
opts[i] = v.ToString()
}
// prevent accessing nil pointer
if l.Context == nil {
l.Context = &PacketContext{}
}
return filter([]string{
formatTimestamp(l.Timestamp),
strings.Join(opts, ""),
l.Context.SrcIP,
l.Context.DstIP,
})
}
func (l IPv6HopByHop) Time() string {
return l.Timestamp
}
func (o IPv6HopByHopOption) ToString() string {
var b strings.Builder
b.WriteString(Begin)
b.WriteString(formatInt32(o.OptionType)) // int32
b.WriteString(formatInt32(o.OptionLength)) // int32
b.WriteString(formatInt32(o.ActualLength)) // int32
b.WriteString(hex.EncodeToString(o.OptionData)) // []byte
b.WriteString(o.OptionAlignment.ToString()) // *IPv6HopByHopOptionAlignment
b.WriteString(End)
return b.String()
}
func (a IPv6HopByHopOptionAlignment) ToString() string {
return join(formatInt32(a.One), formatInt32(a.Two))
}
func (a IPv6HopByHop) JSON() (string, error) {
return jsonMarshaler.MarshalToString(&a)
}
var ip6hopMetric = prometheus.NewCounterVec(
prometheus.CounterOpts{
Name: strings.ToLower(Type_NC_IPv6HopByHop.String()),
Help: Type_NC_IPv6HopByHop.String() + " audit records",
},
fieldsIPv6HopByHop[1:],
)
func init() {
prometheus.MustRegister(ip6hopMetric)
}
func (a IPv6HopByHop) Inc() {
ip6hopMetric.WithLabelValues(a.CSVRecord()[1:]...).Inc()
}
func (a *IPv6HopByHop) SetPacketContext(ctx *PacketContext) {
a.Context = ctx
}
func (a IPv6HopByHop) Src() string {
if a.Context != nil {
return a.Context.SrcIP
}
return ""
}
func (a IPv6HopByHop) Dst() string {
if a.Context != nil {
return a.Context.DstIP
}
return ""
}