github/bettercap
1
0
Fork 0
mirror of https://github.com/bettercap/bettercap synced 2025-07-16 10:03:39 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

new: grabbing meta info from mDNS TXT records

Browse source
This commit is contained in:
evilsocket 2018-08-30 14:55:38 +03:00
parent 3789b21ba1
commit 798df7e32f
No known key found for this signature in database
GPG key ID: 1564D7F30393A456
4 changed files with 51 additions and 8 deletions
Download patch file Download diff file Expand all files Collapse all files

31
packets/mdns.go
View file

@ -1,6 +1,10 @@
package packets
import (
"strings"
"github.com/bettercap/bettercap/core"
"github.com/google/gopacket"
"github.com/google/gopacket/layers"
@ -9,6 +13,33 @@ import (
const MDNSPort = 5353
func MDNSGetMeta(pkt gopacket.Packet) map[string]string {
if ludp := pkt.Layer(layers.LayerTypeUDP); ludp != nil {
if udp := ludp.(*layers.UDP); udp != nil && udp.SrcPort == MDNSPort && udp.DstPort == MDNSPort {
var msg dns.Msg
if err := msg.Unpack(udp.Payload); err == nil && msg.Opcode == dns.OpcodeQuery && len(msg.Answer) > 0 {
for _, answer := range append(msg.Answer, msg.Extra...) {
switch answer.(type) {
case *dns.TXT:
meta := make(map[string]string)
txt := answer.(*dns.TXT)
for _, value := range txt.Txt {
if strings.Contains(value, "=") {
parts := strings.SplitN(value, "=", 2)
meta[core.Trim(parts[0])] = core.Trim(parts[1])
}
}
if len(meta) > 0 {
return meta
}
}
}
}
}
}
return nil
}
func MDNSGetHostname(pkt gopacket.Packet) string {
if ludp := pkt.Layer(layers.LayerTypeUDP); ludp != nil {
if udp := ludp.(*layers.UDP); udp != nil && udp.SrcPort == MDNSPort && udp.DstPort == MDNSPort {