def test_traffic_flows(self):
"""
Attach the tunnel flows with UE IP address and
send GTP and ARP traffic.
"""
# Need to delete all default flows in table 0 before
# install the specific flows test case.
self.test_detach_default_tunnel_flows()
# Attach the tunnel flows towards UE.
seid1 = 5000
self.classifier_controller.add_tunnel_flows(65525, 1, 1000,
"192.168.128.30",
self.EnodeB_IP, seid1)
# Create a set of packets
pkt_sender = ScapyPacketInjector(self.BRIDGE)
eth = Ether(dst=self.MAC_1, src=self.MAC_2)
ip = IP(src=self.Dst_nat, dst='192.168.128.30')
o_udp = UDP(sport=2152, dport=2152)
i_udp = UDP(sport=1111, dport=2222)
i_tcp = TCP(seq=1, sport=1111, dport=2222)
i_ip = IP(src='192.168.60.142', dst=self.EnodeB_IP)
arp = ARP(hwdst=self.MAC_1,
hwsrc=self.MAC_2,
psrc=self.Dst_nat,
pdst='192.168.128.30')
gtp_packet_udp = eth / ip / o_udp / GTP_U_Header(
teid=0x1, length=28, gtp_type=255) / i_ip / i_udp
gtp_packet_tcp = eth / ip / o_udp / GTP_U_Header(
teid=0x1, length=68, gtp_type=255) / i_ip / i_tcp
arp_packet = eth / arp
# Check if these flows were added (queries should return flows)
flow_queries = [
FlowQuery(self._tbl_num,
self.testing_controller,
match=MagmaMatch(tunnel_id=1, in_port=32768)),
FlowQuery(self._tbl_num,
self.testing_controller,
match=MagmaMatch(ipv4_dst='192.168.128.30'))
]
# =========================== Verification ===========================
# Verify 5 flows installed for classifier table (3 pkts matched)
flow_verifier = FlowVerifier([
FlowTest(FlowQuery(self._tbl_num, self.testing_controller), 3, 5),
FlowTest(flow_queries[0], 0, 1),
], lambda: wait_after_send(self.testing_controller))
snapshot_verifier = SnapshotVerifier(self, self.BRIDGE,
self.service_manager)
with flow_verifier, snapshot_verifier:
pkt_sender.send(gtp_packet_udp)
pkt_sender.send(gtp_packet_tcp)
pkt_sender.send(arp_packet)
flow_verifier.verify()
def test_traffic_paging_flow(self):
"""
Add paging flow in table 0
"""
# Need to delete all default flows in table 0 before
# install the specific flows test case.
self.classifier_controller._delete_all_flows()
ue_ip_addr = "192.168.128.30"
self.classifier_controller.install_paging_flow(
IPAddress(version=IPAddress.IPV4,
address=ue_ip_addr.encode('utf-8')), 200, True)
# Create a set of packets
pkt_sender = ScapyPacketInjector(self.BRIDGE)
eth = Ether(dst=self.MAC_1, src=self.MAC_2)
ip = IP(src=self.Dst_nat, dst='192.168.128.30')
o_udp = UDP(sport=2152, dport=2152)
i_udp = UDP(sport=1111, dport=2222)
i_tcp = TCP(seq=1, sport=1111, dport=2222)
i_ip = IP(src='192.168.60.142', dst=self.EnodeB_IP)
gtp_packet_udp = eth / ip / o_udp / GTP_U_Header(
teid=0x1, length=28, gtp_type=255) / i_ip / i_udp
gtp_packet_tcp = eth / ip / o_udp / GTP_U_Header(
teid=0x1, length=68, gtp_type=255) / i_ip / i_tcp
# Check if these flows were added (queries should return flows)
flow_queries = [
FlowQuery(self._tbl_num,
self.testing_controller,
match=MagmaMatch(tunnel_id=1, in_port=32768)),
FlowQuery(self._tbl_num,
self.testing_controller,
match=MagmaMatch(ipv4_dst='192.168.128.30'))
]
# =========================== Verification ===========================
# Verify 2 flows installed for classifier table (2 pkts matched)
flow_verifier = FlowVerifier([
FlowTest(FlowQuery(self._tbl_num, self.testing_controller), 2, 2),
], lambda: wait_after_send(self.testing_controller))
snapshot_verifier = SnapshotVerifier(self, self.BRIDGE,
self.service_manager)
with flow_verifier, snapshot_verifier:
pkt_sender.send(gtp_packet_udp)
pkt_sender.send(gtp_packet_tcp)
flow_verifier.verify()
def verify_gtp_forwarding(self):
payload = self.build_from_ue_to_sgi(b"42", remote_ip=self.remote_ip)
# UE -> remote_ip
self.send_from_grx(GTP_U_Header(seq=42, teid=self.teid) / payload)
self.assert_packet_sent_to_sgi(b"42", remote_ip=self.remote_ip)
# remote_ip -> UE
self.send_from_sgi_to_ue(b"4242", remote_ip=self.remote_ip)
self.assert_packet_sent_to_ue(b"4242", remote_ip=self.remote_ip)
def encap_mcast(self, pkt, src_ip, src_mac, vni):
"""
Encapsulate the original payload frame by adding GTPU header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=src_mac, dst=self.mcast_mac) /
IP(src=src_ip, dst=self.mcast_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
GTP_U_Header(teid=vni, gtp_type=self.gtp_type, length=150) /
pkt)
def encapsulate(self, pkt, vni):
"""
Encapsulate the original payload frame by adding GTPU header with its
UDP, IP and Ethernet fields
"""
return (Ether(src=self.pg0.remote_mac, dst=self.pg0.local_mac) /
IP(src=self.pg0.remote_ip4, dst=self.pg0.local_ip4) /
UDP(sport=self.dport, dport=self.dport, chksum=0) /
GTP_U_Header(TEID=vni, gtp_type=self.gtp_type, length=150) /
pkt)
def test_gtp_echo(self):
try:
self.associate()
self.heartbeat()
self.establish_session()
self.verify_gtp_echo(GTP_U_Header(seq=42) / GTPEchoRequest())
# no sequence number => drop
self.verify_gtp_no_echo(GTP_U_Header(S=0) / GTPEchoRequest())
self.verify_gtp_echo(GTP_U_Header(seq=42) / GTPEchoRequest())
self.verify_gtp_echo(
GTP_U_Header(seq=42, teid=self.UNODE_TEID) / GTPEchoRequest())
# Verify stripping extensions (these extensions are
# used here just b/c they're available in Scapy GTP module)
self.verify_gtp_echo(
GTP_U_Header(seq=42, PN=1, npdu=123) / GTPEchoRequest() /
GTP_UDPPort_ExtensionHeader(udp_port=1234) /
GTP_PDCP_PDU_ExtensionHeader(pdcp_pdu=123))
# Verify stripping IE (the IE is not relevant here)
self.verify_gtp_echo(
GTP_U_Header(seq=42) / GTPEchoRequest() / IE_SelectionMode())
self.verify_gtp_forwarding()
self.delete_session()
finally:
self.vapi.cli("show error")
from scapy.contrib.gtp import (GTP_U_Header, GTPPDUSessionContainer)
from scapy.all import *
sendp(Ether() / IP(src="192.168.50.100", dst="192.168.50.200") /
UDP(sport=2152, dport=2152) / GTP_U_Header(teid=100, next_ex=133) /
GTPPDUSessionContainer(type=1, QFI=6) /
IP(src="192.168.128.79", dst="8.8.8.8") / TCP(sport=5001, dport=53),
iface="veth0",
count=5)
from scapy.all import * from scapy.contrib.gtp import GTP_U_Header data= "Orange Lab Network - SGI Primary" sendp(Ether(dst="00:0c:29:46:1f:53")/ IP(src="172.20.16.3",dst="172.20.16.2")/ UDP(dport=2152)/GTP_U_Header(teid=1234)/ IP(src="10.10.10.10",dst="172.22.16.3",version=4)/ UDP()/data, iface="n3")
def main():
"""Send packet from one traffic generator interface to the other."""
args = TrafficScriptArg([
u"tg_if1_mac",
u"dut_if1_mac",
u"flow_type",
u"proto",
], [u"src_ip", u"dst_ip", u"src_port", u"dst_port", u"value"])
tx_if = args.get_arg(u"tx_if")
tx_src_mac = args.get_arg(u"tg_if1_mac")
tx_dst_mac = args.get_arg(u"dut_if1_mac")
flow_type = args.get_arg(u"flow_type")
proto = args.get_arg(u"proto")
src = args.get_arg(u"src_ip")
dst = args.get_arg(u"dst_ip")
sport = eval(args.get_arg(u"src_port"))
dport = eval(args.get_arg(u"dst_port"))
value = eval(args.get_arg(u"value"))
txq = TxQueue(tx_if)
if flow_type == u"IP4":
pkt_raw = (Ether(src=tx_src_mac, dst=tx_dst_mac) /
IP(src=src, dst=dst))
elif flow_type == u"IP6":
pkt_raw = (Ether(src=tx_src_mac, dst=tx_dst_mac) /
IPv6(src=src, dst=dst))
elif flow_type == u"ETHER":
pkt_raw = Ether(src=tx_src_mac, dst=tx_dst_mac)
else:
raise ValueError(f"Flow type error: {flow_type}")
if proto == u"TCP":
pkt_raw /= TCP(sport=sport, dport=dport)
elif proto == u"UDP":
pkt_raw /= UDP(sport=sport, dport=dport)
elif proto == u"AH":
pkt_raw /= AH(spi=value)
elif proto == u"ESP":
pkt_raw /= ESP(spi=value)
elif proto == u"GTPU":
pkt_raw /= (UDP() / GTP_U_Header(teid=value) /
IP(src=u"192.168.10.20"))
elif proto == u"L2TPV3":
value_hex = hex(value).replace('0x', (8 - len(hex(value)) + 2) * '0')
session_id = binascii.a2b_hex(value_hex)
pkt_raw.proto = 115
pkt_raw /= Raw(session_id)
elif proto == u"VXLAN":
pkt_raw /= (UDP() / VXLAN(vni=value))
elif proto == u"ARP":
pkt_raw.type = value
pkt_raw /= ARP()
else:
raise ValueError(f"Flow proto error: {proto}")
pkt_raw /= Raw()
txq.send(pkt_raw)
sys.exit(0)
def pkt_gtpu_encap(pkt, teid, ip_dst, ip_src):
return Ether(src=pkt[Ether].src, dst=pkt[Ether].dst) / \
IP(src=ip_src,dst=ip_dst)/UDP(dport=GTPU_UDP_PORT)/GTP_U_Header(teid=teid)/pkt[Ether].payload
#!/usr/bin/env python3 # sudo /home/vagrant/build/python/bin/python gtp-cmd.py 192.168.60.141 192.168.60.142 192.168.128.12 192.168.129.42 eth1 import sys import time from scapy.all import * from scapy.contrib.gtp import GTP_U_Header, GTPPDUSessionContainer from scapy.layers.l2 import getmacbyip ip_src = sys.argv[1] ip_dst = sys.argv[2] i_ip_src = sys.argv[3] i_ip_dst = sys.argv[4] egress_dev = sys.argv[5] dst_mac = getmacbyip(ip_dst) eth = Ether(src='08:00:27:d3:52:d1', dst=dst_mac) ip = IP(src=ip_src, dst=ip_dst) udp = UDP(sport=2152, dport=2152) i_ip = IP(src=i_ip_src, dst=i_ip_dst) i_udp = UDP(sport=56531, dport=5001) gtp_packet_tcp = eth / ip / udp / GTP_U_Header(teid=104) / i_ip / i_udp sendp(gtp_packet_tcp, iface=egress_dev, count=1) time.sleep(.5)
from scapy.all import *
from scapy.contrib.gtp import GTP_U_Header
data = "Orange Lab Network - SGI Seconary"
sendp(Ether(dst="00:0c:29:46:1f:53") /
IP(src="172.20.16.3", dst="172.20.16.2") / UDP(dport=2152) /
GTP_U_Header(teid=5678) /
IP(src="20.20.20.20", dst="172.23.16.3", version=4) / UDP() / data,
iface="n3")
