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dhcp4.go
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dhcp4.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 dhcpv4Encoder = CreateLayerEncoder(types.Type_NC_DHCPv4, layers.LayerTypeDHCPv4, func(layer gopacket.Layer, timestamp string) proto.Message {
if dhcp4, ok := layer.(*layers.DHCPv4); ok {
var opts []*types.DHCPOption
for _, o := range dhcp4.Options {
opts = append(opts, &types.DHCPOption{
Data: o.Data,
Length: int32(o.Length),
Type: int32(o.Type),
})
}
return &types.DHCPv4{
Timestamp: timestamp,
Operation: int32(dhcp4.Operation),
HardwareType: int32(dhcp4.HardwareType),
HardwareLen: int32(dhcp4.HardwareLen),
HardwareOpts: int32(dhcp4.HardwareOpts),
Xid: uint32(dhcp4.Xid),
Secs: int32(dhcp4.Secs),
Flags: int32(dhcp4.Flags),
ClientIP: dhcp4.ClientIP.String(),
YourClientIP: dhcp4.YourClientIP.String(),
NextServerIP: dhcp4.NextServerIP.String(),
RelayAgentIP: dhcp4.RelayAgentIP.String(),
ClientHWAddr: dhcp4.ClientHWAddr.String(),
ServerName: []byte(dhcp4.ServerName),
File: []byte(dhcp4.File),
Options: opts,
}
}
return nil
})