github/bettercap
1
0
Fork 0
mirror of https://github.com/bettercap/bettercap synced 2025-08-14 10:46:57 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

check if nil before the interface conversion

Browse source
This commit is contained in:
Murilo Santana 2018-02-01 14:09:21 -02:00
commit b03b7c8b56
1 changed files with 10 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

16
modules/dns_spoof.go
View file

@ -234,14 +234,18 @@ func (s *DNSSpoofer) shouldSpoof(domain string) bool {
}
func (s *DNSSpoofer) onPacket(pkt gopacket.Packet) {
eth := pkt.Layer(layers.LayerTypeEthernet).(*layers.Ethernet)
udp := pkt.Layer(layers.LayerTypeUDP).(*layers.UDP)
if eth == nil || udp == nil {
typeEth := pkt.Layer(layers.LayerTypeEthernet)
typeUDP := pkt.Layer(layers.LayerTypeUDP)
if typeEth == nil || typeUDP == nil {
return
} else if s.All == true || bytes.Compare(eth.DstMAC, s.Session.Interface.HW) == 0 {
}
eth := typeEth.(*layers.Ethernet)
if s.All || bytes.Compare(eth.DstMAC, s.Session.Interface.HW) == 0 {
dns, parsed := pkt.Layer(layers.LayerTypeDNS).(*layers.DNS)
if parsed == true && dns.OpCode == layers.DNSOpCodeQuery && len(dns.Questions) > 0 && len(dns.Answers) == 0 {
if parsed && dns.OpCode == layers.DNSOpCodeQuery && len(dns.Questions) > 0 && len(dns.Answers) == 0 {
udp := typeUDP.(*layers.UDP)
for _, q := range dns.Questions {
qName := string(q.Name)
if s.shouldSpoof(qName) == true {