def create_vxlan_packet(self,
outer_da,
outer_sa,
outer_dip,
outer_sip,
vni,
inner_da,
inner_dip,
inner_sa="00:11:22:33:55:66",
inner_sip="192.168.0.44",
is_inner_vlan=False,
vlan_id=1):
out_ether = scapy.Ether(dst=outer_da, src=outer_sa)
out_ip = scapy.IP(dst=outer_dip, src=outer_sip)
out_udp = scapy.UDP(dport=4789,
sport=random.randint(
49152, 65535 - NUM_CONTINUOUS_PKT_COUNT))
vxlan = scapy.VXLAN(vni=vni)
ether = scapy.Ether(dst=inner_da, src=inner_sa)
dot1q = scapy.Dot1Q(vlan=vlan_id)
ip = scapy.IP(dst=inner_dip, src=inner_sip)
udp = scapy.UDP(dport=22222, sport=11111)
# minimum packet for untagged
payload = "\0" * (64 - 4 - len(ether / ip / udp))
packet_vxlan = out_ether / out_ip / out_udp / vxlan / ether / ip / udp / payload
if is_inner_vlan:
packet_inner = ether / dot1q / ip / udp / payload
else:
packet_inner = ether / ip / udp / payload
return packet_vxlan, packet_inner
def simple_nvgrev6_packet(self,
pktlen=300,
eth_dst='00:01:02:03:04:05',
eth_src='00:06:07:08:09:0a',
dl_vlan_enable=False,
vlan_vid=0,
vlan_pcp=0,
dl_vlan_cfi=0,
ipv6_src='1::2',
ipv6_dst='3::4',
ipv6_fl=0,
ipv6_tc=0,
ipv6_ecn=None,
ipv6_dscp=None,
ipv6_hlim=64,
nvgre_version=0,
nvgre_tni=None,
nvgre_flowid=0,
inner_frame=None):
'''
@summary: Helper function to construct an IPv6 NVGRE packet
'''
if scapy.NVGRE is None:
logging.error(
"A NVGRE packet was requested but NVGRE is not supported by your Scapy. See README for more information"
)
return None
if MINSIZE > pktlen:
pktlen = MINSIZE
nvgre_hdr = scapy.NVGRE(vsid=nvgre_tni, flowid=nvgre_flowid)
if (dl_vlan_enable):
pkt = scapy.Ether(dst=eth_dst, src=eth_src)/ \
scapy.Dot1Q(prio=vlan_pcp, id=dl_vlan_cfi, vlan=vlan_vid)/ \
scapy.IPv6(src=ipv6_src, dst=ipv6_dst, fl=ipv6_fl, tc=ipv6_tc, hlim=ipv6_hlim, nh=47)/ \
nvgre_hdr
else:
pkt = scapy.Ether(dst=eth_dst, src=eth_src)/ \
scapy.IPv6(src=ipv6_src, dst=ipv6_dst, fl=ipv6_fl, tc=ipv6_tc, hlim=ipv6_hlim, nh=47)/ \
nvgre_hdr
if inner_frame:
pkt = pkt / inner_frame
else:
pkt = pkt / scapy.IP()
pkt = pkt / ("D" * (pktlen - len(pkt)))
return pkt
def simple_eth_packet(pktlen=60,
eth_dst="00:01:02:03:04:05",
eth_src="00:06:07:08:09:0a",
vlan_vid=0,
vlan_pcp=0):
pkt = scapy.Ether(dst=eth_dst, src=eth_src)
if vlan_vid or vlan_pcp:
pktlen += 4
pkt /= scapy.Dot1Q(vlan=vlan_vid, prio=vlan_pcp)
pkt[scapy.Dot1Q:1].type = DEFAULT_FDB_ETHERNET_TYPE
else:
pkt.type = DEFAULT_FDB_ETHERNET_TYPE
pkt = pkt / ("0" * (pktlen - len(pkt)))
return pkt
