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This commit is contained in:
evilsocket 2018-01-13 02:35:30 +01:00
parent 78d654552e
commit b828a175e1
1 changed files with 14 additions and 10 deletions
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24
modules/dhcp6_spoof.go
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@ -357,6 +357,16 @@ func (s *DHCP6Spoofer) dhcpReply(toType string, pkt gopacket.Packet, req dhcp6.P
} }
} }
func (s *DHCP6Spoofer) duidMatches(dhcp dhcp6.Packet) bool {
if raw, found := dhcp.Options[dhcp6.OptionServerID]; found == true && len(raw) >= 1 {
rawServerID := raw[0]
if bytes.Compare(rawServerID, s.DUIDRaw) == 0 {
return true
}
}
return false
}
func (s *DHCP6Spoofer) onPacket(pkt gopacket.Packet) { func (s *DHCP6Spoofer) onPacket(pkt gopacket.Packet) {
var dhcp dhcp6.Packet var dhcp dhcp6.Packet
var err error var err error
@ -372,19 +382,13 @@ func (s *DHCP6Spoofer) onPacket(pkt gopacket.Packet) {
s.dhcpAdvertise(pkt, dhcp, eth.SrcMAC) s.dhcpAdvertise(pkt, dhcp, eth.SrcMAC)
case dhcp6.MessageTypeRequest: case dhcp6.MessageTypeRequest:
if raw, found := dhcp.Options[dhcp6.OptionServerID]; found == true && len(raw) >= 1 { if s.duidMatches(dhcp) {
rawServerID := raw[0] s.dhcpReply("request", pkt, dhcp, eth.SrcMAC)
if bytes.Compare(rawServerID, s.DUIDRaw) == 0 {
s.dhcpReply("request", pkt, dhcp, eth.SrcMAC)
}
} }
case dhcp6.MessageTypeRenew: case dhcp6.MessageTypeRenew:
if raw, found := dhcp.Options[dhcp6.OptionServerID]; found == true && len(raw) >= 1 { if s.duidMatches(dhcp) {
rawServerID := raw[0] s.dhcpReply("renew", pkt, dhcp, eth.SrcMAC)
if bytes.Compare(rawServerID, s.DUIDRaw) == 0 {
s.dhcpReply("renew", pkt, dhcp, eth.SrcMAC)
}
} }
} }
} }