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Packet handler

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This commit is contained in:
Giuseppe Trotta 2018-02-13 04:16:17 +01:00
commit 6a8f9880ee
1 changed files with 51 additions and 4 deletions
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55
modules/arp_spoof.go
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@ -145,12 +145,59 @@ func (p *ArpSpoofer) pktRouter(eth *layers.Ethernet, ip4 *layers.IPv4, pkt gopac
}
for _, target := range p.addresses {
if bytes.Compare(ip4.SrcIP, target) == 0 {
// TODO: get real mac && patch
} else if bytes.Compare(ip4.DstIP, target) == 0 {
// TODO: get real mac && patch
targetMAC, err := p.getMAC(target, true);
if err != nil {
log.Error("Error retrieving target MAC address for %s", target.String(), err)
return
}
// If SRC_MAC is different from both TARGET(s) & GW ignore
if bytes.Compare(eth.SrcMAC, targetMAC) != 0 && bytes.Compare(eth.SrcMAC, p.Session.Gateway.HW) != 0 {
// TODO Delete this debug
//log.Debug("[ignored] [%s] ===> [%s]", eth.SrcMAC, eth.DstMAC)
continue
}
// If DST_MAC is not our Interface.IP ignore
if bytes.Compare(eth.DstMAC, p.Session.Interface.HW) != 0 {
// TODO Delete this debug
//log.Warning("[notForMiTM] [(%s) %s] ===> [%s (%s)]", eth.SrcMAC, ip4.SrcIP, ip4.DstIP, eth.DstMAC)
continue
}
if !ip4.SrcIP.Equal(target) && !ip4.DstIP.Equal(target) {
// TODO Delete this debug
//log.Warning("[notTarget] [(%s) %s] ===> [%s (%s)]", eth.SrcMAC, ip4.SrcIP, ip4.DstIP, eth.DstMAC)
continue
}
// TODO Craft packet
craftedEth := eth
if bytes.Compare(eth.SrcMAC, targetMAC) == 0 {
log.Error("[Reinject] [(%s) %s] ===> [%s (%s)]", eth.SrcMAC, ip4.SrcIP, ip4.DstIP, eth.DstMAC)
// TODO Fix Layers
craftedEth.SrcMAC = p.Session.Interface.HW
craftedEth.DstMAC = p.Session.Gateway.HW
} else {
log.Warning("[Reinject] [(%s) %s] <=== [%s (%s)]", eth.SrcMAC, ip4.SrcIP, ip4.DstIP, eth.DstMAC)
// TODO Fix Layers
craftedEth.SrcMAC = p.Session.Interface.HW
craftedEth.DstMAC = targetMAC
}
err, serial := packets.Serialize(craftedEth);
if err != nil {
log.Error("Error while ReInjecting: [%s] ==> [%s]", craftedEth.SrcMAC, craftedEth.DstMAC, )
return
}
log.Warning("[Injectin] [(%s) %s] ===> [%s (%s)] - %v+", craftedEth.SrcMAC, ip4.SrcIP, ip4.DstIP, craftedEth.DstMAC, craftedEth.EthernetType.String())
p.Session.Queue.Send(serial)
}
}
func (p *ArpSpoofer) Configure() error {