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misc: small fix or general refactoring i did not bother commenting

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evilsocket 2018-02-15 18:09:21 +01:00
commit da48a0fa69
1 changed files with 12 additions and 27 deletions
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39
modules/arp_spoof.go
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@ -142,39 +142,24 @@ func (p *ArpSpoofer) unSpoof() error {
func (p *ArpSpoofer) pktRouter(eth *layers.Ethernet, ip4 *layers.IPv4, pkt gopacket.Packet) { func (p *ArpSpoofer) pktRouter(eth *layers.Ethernet, ip4 *layers.IPv4, pkt gopacket.Packet) {
if eth == nil || ip4 == nil { if eth == nil || ip4 == nil {
return return
} else if ip4.DstIP.Equal(p.Session.Gateway.IP) {
return
} else if bytes.Compare(eth.DstMAC, p.Session.Interface.HW) != 0 {
return
} }
// check if this packet is from or to one of the spoofing targets log.Info("Got packet to route: %s\n", pkt.String())
// and therefore needs patching and forwarding.
for _, target := range p.addresses {
// we're only interested in packets:
//
// 1. generated from one of our targets.
// 2. going to the router IP
// 3. but with our mac addresses as destination
if ip4.SrcIP.Equal(target) == false { copy(eth.DstMAC, p.Session.Gateway.HW)
continue
} else if ip4.DstIP.Equal(p.Session.Gateway.IP) == false {
continue
} else if bytes.Compare(eth.DstMAC, p.Session.Interface.HW) != 0 {
continue
}
log.Info("Got packet to route: %s\n", pkt.String()) log.Info("After: %s\n", pkt.String())
copy(eth.DstMAC, p.Session.Gateway.HW) data := pkt.Data()
if err := p.Session.Queue.Send(data); err != nil {
log.Info("After: %s\n", pkt.String()) log.Error("Could not reinject packet: %s", err)
} else {
data := pkt.Data() log.Info("Reinjected %d bytes.", len(data))
if err := p.Session.Queue.Send(data); err != nil {
log.Error("Could not reinject packet: %s", err)
} else {
log.Info("Reinjected %d bytes.", len(data))
}
} }
} }
func (p *ArpSpoofer) Configure() error { func (p *ArpSpoofer) Configure() error {