/
igmp.go
63 lines (60 loc) · 2.25 KB
/
igmp.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 encoder
import (
"github.com/dreadl0ck/netcap/types"
"github.com/golang/protobuf/proto"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
)
var igmpEncoder = CreateLayerEncoder(
types.Type_NC_IGMP,
layers.LayerTypeIGMP,
func(layer gopacket.Layer, timestamp string) proto.Message {
if igmp, ok := layer.(*layers.IGMP); ok {
var addresses []string
for _, ip := range igmp.SourceAddresses {
addresses = append(addresses, ip.String())
}
var records []*types.IGMPv3GroupRecord
for _, r := range igmp.GroupRecords {
var srca []string
for _, ip := range r.SourceAddresses {
srca = append(srca, ip.String())
}
records = append(records, &types.IGMPv3GroupRecord{
Type: int32(r.Type),
AuxDataLen: int32(r.AuxDataLen),
NumberOfSources: int32(r.NumberOfSources),
MulticastAddress: r.MulticastAddress.String(),
SourceAddresses: srca,
})
}
return &types.IGMP{
Timestamp: timestamp,
Type: int32(igmp.Type),
MaxResponseTime: uint64(igmp.MaxResponseTime),
Checksum: int32(igmp.Checksum),
GroupAddress: []byte(igmp.GroupAddress),
SupressRouterProcessing: igmp.SupressRouterProcessing,
RobustnessValue: int32(igmp.RobustnessValue),
IntervalTime: uint64(igmp.IntervalTime),
SourceAddresses: addresses,
NumberOfGroupRecords: int32(igmp.NumberOfGroupRecords),
NumberOfSources: int32(igmp.NumberOfSources),
GroupRecords: records,
Version: int32(igmp.Version),
}
}
return nil
})