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ToDHCPClients.go
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ToDHCPClients.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 transform
import (
"fmt"
netmaltego "github.com/dreadl0ck/netcap/maltego"
"log"
"github.com/dreadl0ck/maltego"
"github.com/dreadl0ck/netcap/types"
"github.com/dreadl0ck/netcap/utils"
)
func toDHCPClients() {
results := map[string]int{}
netmaltego.DHCPV4Transform(
nil,
func(lt maltego.LocalTransform, trx *maltego.Transform, dhcp *types.DHCPv4, min, max uint64, path string, ipaddr string) {
// DHCP operations fall into four phases: server discovery, IP lease offer, IP lease request, and IP lease acknowledgement.
// to identify the client we are only looking for server discovery messages for now
if dhcp.Operation != 1 {
return
}
log.Println("HW:", dhcp.ClientHWAddr+" FP: "+dhcp.Fingerprint)
ident := dhcp.ClientHWAddr + "\n" + dhcp.Fingerprint
// prevent duplicating results
if _, ok := results[ident]; ok {
return
}
results[ident]++
// log.Println("ident", ident, dhcp.Fingerprint)
ent := addEntityWithPath(trx, "netcap.DHCPClient", ident, path)
ent.AddProperty("timestamp", "Timestamp", maltego.Strict, utils.UnixTimeToUTC(dhcp.Timestamp))
ent.AddProperty("clientIP", "ClientIP", maltego.Strict, dhcp.ClientIP)
ent.AddProperty("serverIP", "ServerIP", maltego.Strict, dhcp.NextServerIP)
ent.AddProperty("fp", "Fingerprint", maltego.Strict, dhcp.Fingerprint)
ent.AddProperty("clientMac", "ClientHWAddr", maltego.Strict, dhcp.ClientHWAddr)
for _, o := range dhcp.Options {
if utils.IsASCII([]byte(o.Data)) && len(o.Data) > 1 {
switch o.Type {
case 60:
ent.AddProperty("vendor", "Vendor", maltego.Strict, o.Data)
case 12:
ent.AddProperty("host", "Hostname", maltego.Strict, o.Data)
case 15:
ent.AddProperty("domain", "Domain", maltego.Strict, o.Data)
}
}
}
},
false,
)
fmt.Println(results)
}