[dts] [PATCH 1/4] add unified packet type module and test suite

[Yufen Mo <yufengx.mo@intel.com>]

From: yufengmx <yufengmx.mo@intel.com>

unified packet type test suite implementation

Signed-off-by: yufengmx <yufengmx.mo@intel.com>
---
 framework/packet.py | 642 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 642 insertions(+)
 create mode 100755 framework/packet.py

diff --git a/framework/packet.py b/framework/packet.py
new file mode 100755
index 0000000..0a3f330
--- /dev/null
+++ b/framework/packet.py
@@ -0,0 +1,642 @@
+#!/usr/bin/python
+# BSD LICENSE
+#
+# Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+#   * Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in
+#     the documentation and/or other materials provided with the
+#     distribution.
+#   * Neither the name of Intel Corporation nor the names of its
+#     contributors may be used to endorse or promote products derived
+#     from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+"""
+Generic packet create, transmit and analyze module
+Base on scapy(python program for packet manipulation)
+"""
+
+import os
+import time
+import signal
+import sys
+import re
+import signal
+import random
+import subprocess
+from uuid import uuid4
+from settings import FOLDERS
+
+from scapy.config import conf
+conf.use_pcap = True
+
+from scapy.all import conf
+from scapy.utils import struct, socket, wrpcap, rdpcap
+from scapy.layers.inet import Ether, IP, TCP, UDP, ICMP
+from scapy.layers.inet6 import IPv6, IPv6ExtHdrRouting, IPv6ExtHdrFragment
+from scapy.layers.l2 import Dot1Q, ARP, GRE
+from scapy.layers.sctp import SCTP, SCTPChunkData
+from scapy.sendrecv import sniff
+from scapy.route import *
+from scapy.packet import bind_layers, Raw
+from scapy.sendrecv import sendp
+
+
+sys.path.append(FOLDERS['Depends'])
+# load extension layers
+from vxlan import Vxlan
+bind_layers(UDP, Vxlan, dport=4789)
+bind_layers(Vxlan, Ether)
+from nvgre import NVGRE, IPPROTO_NVGRE
+bind_layers(IP, NVGRE, proto=IPPROTO_NVGRE)
+bind_layers(NVGRE, Ether)
+from lldp import LLDP, LLDPManagementAddress
+bind_layers(Ether, LLDP, type=0x88cc)
+
+# packet generator type should be configured later
+PACKETGEN = "scapy"
+
+LayersTypes = {
+    "L2": ['ether', 'dot1q', '1588', 'arp', 'lldp'],
+    # ipv4_ext_unknown, ipv6_ext_unknown
+    "L3": ['ipv4','ipv4ihl', 'ipv6', 'ipv4_ext', 'ipv6_ext','ipv6_ext2', 'ipv6_frag'],
+    "L4": ['tcp', 'udp', 'frag', 'sctp', 'icmp', 'nofrag'],
+    "TUNNEL": ['ip', 'gre', 'vxlan', 'nvgre', 'geneve', 'grenat'],
+    "INNER L2": ['inner_mac', 'inner_mac&vlan'],
+    # inner_ipv4_unknown, inner_ipv6_unknown
+    "INNER L3": ['inner_ipv4', 'inner_ipv4_ext', 'inner_ipv6', 'inner_ipv6_ext'],
+    "INNER L4": ['inner_tcp', 'inner_udp', 'inner_frag', 'inner_sctp', 'inner_icmp', 'inner_nofrag'],
+    "PAYLOAD": ['raw']
+}
+
+# Saved back groud sniff process id
+SNIFF_PIDS = {}
+
+# Saved packet generator process id
+# used in pktgen or tgen
+PKTGEN_PIDS = {}
+
+
+class scapy(object):
+    SCAPY_LAYERS = {
+        'ether': Ether(dst="ff:ff:ff:ff:ff:ff"),
+        'dot1q': Dot1Q(),
+        '1588': Ether(type=0x88f7),
+        'arp': ARP(),
+        'ipv4': IP(),
+        'ipv4ihl': IP(ihl=10),
+        'ipv4_ext': IP(frag=5),
+        'ipv6': IPv6(src="::1"),
+        'ipv6_ext': IPv6(src="::1", nh=43)/IPv6ExtHdrRouting(),
+        'ipv6_ext2': IPv6()/IPv6ExtHdrRouting(),
+        'udp': UDP(),
+        'tcp': TCP(),
+        'sctp': SCTP(),
+        'icmp': ICMP(),
+        'gre': GRE(),
+        'raw': Raw(),
+        'vxlan': Vxlan(),
+
+        'inner_mac': Ether(),
+        'inner_mac&vlan': Ether() / Dot1Q(),
+        'inner_ipv4': IP(),
+        'inner_ipv4_ext': IP(),
+        'inner_ipv6': IPv6(src="::1"),
+        'inner_ipv6_ext': IPv6(src="::1"),
+
+        'inner_tcp': TCP(),
+        'inner_udp': UDP(),
+        'inner_sctp': SCTP(),
+        'inner_icmp': ICMP(),
+
+        'lldp': LLDP()/LLDPManagementAddress(),
+        'ip_frag': IP(frag=5),
+        'ipv6_frag': IPv6(src="::1")/IPv6ExtHdrFragment(),
+        'ip_in_ip': IP()/IP(),
+        'ip_in_ip_frag': IP()/IP(frag=5),
+        'ipv6_in_ip': IP()/IPv6(src="::1"),
+        'ipv6_frag_in_ip': IP()/IPv6(src="::1", nh=44)/IPv6ExtHdrFragment(),
+        'nvgre': NVGRE(),
+        'geneve': "Not Implement",
+    }
+
+    def __init__(self):
+        self.pkt = None
+        pass
+
+    def assign_pkt(self, pkt):
+        self.pkt = pkt
+
+    def add_layers(self, layers):
+        self.pkt = None
+        for layer in layers:
+            if self.pkt is not None:
+                self.pkt = self.pkt / self.SCAPY_LAYERS[layer]
+            else:
+                self.pkt = self.SCAPY_LAYERS[layer]
+
+    def ether(self, dst="ff:ff:ff:ff:ff:ff", src="00:00:20:00:00:00", type=None):
+        self.pkt[Ether].dst = dst
+        self.pkt[Ether].src = src
+        if type is not None:
+            self.pkt[Ether].type = type
+
+    def dot1q(self, vlan, prio=0, type=None):
+        self.pkt[Dot1Q].vlan = int(vlan)
+        self.pkt[Dot1Q].prio = prio
+        if type is not None:
+            self.pkt[Dot1Q].type = type
+
+    def strip_dot1q(self, element):
+        value = None
+
+        if self.pkt.haslayer('Dot1Q') is 0:
+            return None
+
+        if element == 'vlan':
+            value = int(str(self.pkt[Dot1Q].vlan))
+        return value
+
+    def ipv4(self, frag=0, src="127.0.0.1", proto=None, tos=0, dst="127.0.0.1", chksum=None, len=None, version=4, flags=None, ihl=None, ttl=64, id=1, options=None):
+        self.pkt[IP].frag = frag
+        self.pkt[IP].src = src
+        if proto is not None:
+            self.pkt[IP].proto = proto
+        self.pkt[IP].tos = tos
+        self.pkt[IP].dst = dst
+        if chksum is not None:
+            self.pkt[IP].chksum = chksum
+        if len is not None:
+            self.pkt[IP].len = len
+        self.pkt[IP].version = version
+        if flags is not None:
+            self.pkt[IP].flags = flags
+        if ihl is not None:
+            self.pkt[IP].ihl = ihl
+        self.pkt[IP].ttl = ttl
+        self.pkt[IP].id = id
+        if options is not None:
+            self.pkt[IP].options = options
+
+    def ipv6(self, version=6, tc=0, fl=0, plen=0, nh=0, hlim=64, src="::1", dst="::1"):
+        """
+        Configure IPv6 protocal.
+        """
+        self.pkt[IPv6].version = version
+        self.pkt[IPv6].tc = tc
+        self.pkt[IPv6].fl = fl
+        if plen:
+            self.pkt[IPv6].plen = plen
+        if nh:
+            self.pkt[IPv6].nh = nh
+        self.pkt[IPv6].src = src
+        self.pkt[IPv6].dst = dst
+
+    def inner_ipv6(self, version=6, tc=0, fl=0, plen=0, nh=0, hlim=64, src="::1", dst="::1"):
+        """
+        Configure IPv6 protocal.
+        """
+        self.pkt[IPv6][Ether][IPv6].version = version
+        self.pkt[IPv6][Ether][IPv6].tc = tc
+        self.pkt[IPv6][Ether][IPv6].fl = fl
+        if plen:
+            self.pkt[IPv6][Ether][IPv6].plen = plen
+        if nh:
+            self.pkt[IPv6][Ether][IPv6].nh = nh
+        self.pkt[IPv6][Ether][IPv6].src = src
+        self.pkt[IPv6][Ether][IPv6].dst = dst
+
+    def udp(self, src=53, dst=53, len=None, chksum=None):
+        self.pkt[UDP].sport = src
+        self.pkt[UDP].dport = dst
+        if len is not None:
+            self.pkt[UDP].len = len
+        if chksum is not None:
+            self.pkt[UDP].chksum = chksum
+
+    def raw(self, payload=None):
+        if payload is not None:
+            self.pkt[Raw].load = ''
+            for load in payload:
+                self.pkt[Raw].load += '%c' % int(load, 16)
+
+    def vxlan(self, vni=0):
+        self.pkt[Vxlan].vni = vni
+
+    def read_pcap(self, file):
+        pcap_pkts = []
+        try:
+            pcap_pkts = rdpcap(file)
+        except:
+            pass
+
+        return pcap_pkts
+
+    def write_pcap(self, file):
+        try:
+            wrpcap(file, self.pkt)
+        except:
+            pass
+
+    def send_pcap_pkt(self, crb=None, file='', intf=''):
+        if intf == '' or file == '' or crb is None:
+            print "Invalid option for send packet by scapy"
+            return
+
+        content = 'pkts=rdpcap(\"%s\");sendp(pkts, iface=\"%s\");exit()' % (file, intf)
+        cmd_file = '/tmp/scapy_%s.cmd' % intf
+
+        crb.create_file(content, cmd_file)
+        crb.send_expect("scapy -c scapy_%s.cmd &" % intf, "# ")
+
+    def print_summary(self):
+        print "Send out pkt %s" % self.pkt.summary()
+
+    def send_pkt(self, intf=''):
+        self.print_summary()
+        if intf != '':
+            sendp(self.pkt, iface=intf)
+
+
+class Packet(object):
+    """
+    Module for config/create packet
+    Based on scapy module
+    Usage: assign_layers([layers list])
+           config_layer('layername', {layer config})
+           ...
+    """
+    def_packet = {
+        'TIMESYNC': {'layers': ['ether', 'raw'], 'cfgload': False},
+        'ARP': {'layers': ['ether', 'arp'], 'cfgload': False},
+        'LLDP': {'layers': ['ether', 'lldp'], 'cfgload': False},
+        'TCP': {'layers': ['ether', 'ipv4', 'tcp', 'raw'], 'cfgload': True},
+        'UDP': {'layers': ['ether', 'ipv4', 'udp', 'raw'], 'cfgload': True},
+        'SCTP': {'layers': ['ether', 'ipv4', 'sctp', 'raw'], 'cfgload': True},
+        'IPv6_TCP': {'layers': ['ether', 'ipv6', 'tcp', 'raw'], 'cfgload': True},
+        'IPv6_UDP': {'layers': ['ether', 'ipv6', 'udp', 'raw'], 'cfgload': True},
+        'IPv6_SCTP': {'layers': ['ether', 'ipv6', 'sctp', 'raw'], 'cfgload': True},
+    }
+
+    def __init__(self, **options):
+        """
+        pkt_type: description of packet type
+                  defined in def_packet
+        options: special option for Packet module
+                 pkt_len: length of network packet
+                 ran_payload: whether payload of packet is random
+                 pkt_file:
+                 pkt_gen: packet generator type
+                          now only support scapy
+        """
+        self.pkt_layers = []
+        self.pkt_len = 64
+        self.pkt_opts = options
+
+        self.pkt_type = "UDP"
+
+        if 'pkt_type' in self.pkt_opts.keys():
+            self.pkt_type = self.pkt_opts['pkt_type']
+
+        if self.pkt_type in self.def_packet.keys():
+            self.pkt_layers = self.def_packet[self.pkt_type]['layers']
+            self.pkt_cfgload = self.def_packet[self.pkt_type]['cfgload']
+            if "IPv6" in self.pkt_type:
+                self.pkt_len = 128
+        else:
+            self._load_pkt_layers()
+            
+        if 'pkt_len' in self.pkt_opts.keys():
+            self.pkt_len = self.pkt_opts['pkt_len']
+
+        if 'pkt_file' in self.pkt_opts.keys():
+            self.uni_name = self.pkt_opts['pkt_file']
+        else:
+            self.uni_name = '/tmp/' + str(uuid4()) + '.pcap'
+
+        if 'pkt_gen' in self.pkt_opts.keys():
+            if self.pkt_opts['pkt_gen'] == 'scapy':
+                self.pktgen = scapy()
+            else:
+                print "Not support other pktgen yet!!!"
+        else:
+            self.pktgen = scapy()
+
+    def send_pkt(self, crb=None, tx_port='', auto_cfg=True):
+        if tx_port == '':
+            print "Invalid Tx interface"
+            return
+
+        self.tx_port = tx_port
+
+        # assign layer
+        self.assign_layers()
+
+        # config special layer
+        if auto_cfg is True:
+            self.config_def_layers()
+
+        # handle packet options
+        payload_len = self.pkt_len - len(self.pktgen.pkt) - 4
+
+        # if raw data has not been configured and payload should configured
+        if hasattr(self, 'configured_layer_raw') is False and self.pkt_cfgload is True:
+            payload = []
+            raw_confs = {}
+            if 'ran_payload' in self.pkt_opts.keys():
+                for loop in range(payload_len):
+                    payload.append("%02x" % random.randrange(0, 255))
+            else:
+                for loop in range(payload_len):
+                    payload.append('58')  # 'X'
+
+            raw_confs['payload'] = payload
+            self._config_layer_raw(raw_confs)
+
+        # check with port type
+        if 'ixia' in self.tx_port:
+            print "Not Support Yet"
+
+        if crb is not None:
+            self.pktgen.write_pcap(self.uni_name)
+            crb.session.copy_file_to(self.uni_name)
+            pcap_file = self.uni_name.split('/')[2]
+            self.pktgen.send_pcap_pkt(crb=crb, file=pcap_file, intf=self.tx_port)
+        else:
+            self.pktgen.send_pkt(intf=self.tx_port)
+
+    def check_layer_config(self, layer, config):
+        """
+        check the format of layer configuration
+        every layer should has different check function
+        """
+        pass
+
+    def assign_layers(self, layers=None):
+        """
+        assign layer for this packet
+        maybe need add check layer function
+        """
+        if layers is not None:
+            self.pkt_layers = layers
+
+        for layer in self.pkt_layers:
+            found = False
+            l_type = layer.lower()
+
+            for types in LayersTypes.values():
+                if l_type in types:
+                    found = True
+                    break
+
+            if found is False:
+                self.pkt_layers.remove(l_type)
+                print "INVAILD LAYER TYPE [%s]" % l_type.upper()
+
+        self.pktgen.add_layers(self.pkt_layers)
+
+    def _load_pkt_layers(self):
+        name2type = {
+            'MAC': 'ether',
+            'VLAN': 'dot1q',
+            'IP': 'ipv4',
+            'IPihl': 'ipv4ihl',
+            'IPFRAG': 'ipv4_ext',
+            'IPv6': 'ipv6',
+            'IPv6FRAG': 'ipv6_frag',
+            'IPv6EXT': 'ipv6_ext',
+            'IPv6EXT2': 'ipv6_ext2',
+            'TCP': 'tcp',
+            'UDP': 'udp',
+            'SCTP': 'sctp',
+            'ICMP': 'icmp',
+            'NVGRE': 'nvgre',
+            'GRE': 'gre',
+            'VXLAN': 'vxlan',
+            'PKT': 'raw',
+        }
+
+        layers = self.pkt_type.split('_')
+        self.pkt_layers = []
+        self.pkt_cfgload = True
+        for layer in layers:
+            if layer in name2type.keys():
+                self.pkt_layers.append(name2type[layer])
+        
+    def config_def_layers(self):
+        """
+        Handel config packet layers by default
+        """
+        if self.pkt_type == "TIMESYNC":
+            self.config_layer('ether', {'dst': 'FF:FF:FF:FF:FF:FF',
+                                        'type': 0x88f7})
+            self.config_layer('raw', {'payload': ['00', '02']})
+
+        if self.pkt_type == "ARP":
+            self.config_layer('ether', {'dst': 'FF:FF:FF:FF:FF:FF'})
+
+        if self.pkt_type == "IPv6_SCTP":
+            self.config_layer('ipv6', {'nh': 132})
+
+        if "IPv6_NVGRE" in self.pkt_type:
+            self.config_layer('ipv6', {'nh': 47})
+            if "IPv6_SCTP" in self.pkt_type:
+                self.config_layer('inner_ipv6', {'nh': 132})
+            if "IPv6_ICMP" in self.pkt_type:
+                self.config_layer('inner_ipv6', {'nh': 58})
+            if "IPFRAG" in self.pkt_type:
+                self.config_layer('raw', {'payload': ['00'] * 40})
+            else:
+                self.config_layer('raw', {'payload': ['00'] * 18})
+
+        if "MAC_IP_IPv6" in self.pkt_type or\
+           "MAC_IP_NVGRE" in self.pkt_type or \
+           "MAC_IP_UDP_VXLAN" in self.pkt_type:
+            if "IPv6_SCTP" in self.pkt_type:
+                self.config_layer('ipv6', {'nh': 132})
+            if "IPv6_ICMP" in self.pkt_type:
+                self.config_layer('ipv6', {'nh': 58})
+            if "IPFRAG" in self.pkt_type:
+                self.config_layer('raw', {'payload': ['00'] * 40})
+            else:
+                self.config_layer('raw', {'payload': ['00'] * 18})
+        
+    def config_layer(self, layer, config={}):
+        """
+        Configure packet assgined layer
+        return the status of configure result
+        """
+        try:
+            # if inner in layer mean same layer in outer
+            if 'inner' in layer:
+                dup_layer = layer[6:]
+                if self.pkt_layers.count(dup_layer) != 2:
+                    raise
+            else:
+                idx = self.pkt_layers.index(layer)
+        except Exception as e:
+            print "INVALID LAYER ID %s" % layer
+            return -1
+
+        if self.check_layer_config(layer, config) is False:
+            return -1
+
+        layer_conf = getattr(self, "_config_layer_%s" % layer)
+        setattr(self, 'configured_layer_%s' % layer, True)
+
+        return layer_conf(config)
+
+    def _config_layer_ether(self, config):
+        return self.pktgen.ether(**config)
+
+    def _config_layer_dot1q(self, config):
+        return self.pktgen.dot1q(**config)
+
+    def _config_layer_ipv4(self, config):
+        return self.pktgen.ipv4(**config)
+
+    def _config_layer_ipv6(self, config):
+        return self.pktgen.ipv6(**config)
+
+    def _config_layer_inner_ipv6(self, config):
+        return self.pktgen.inner_ipv6(**config)
+
+    def _config_layer_udp(self, config):
+        return self.pktgen.udp(**config)
+
+    def _config_layer_raw(self, config):
+        return self.pktgen.raw(**config)
+
+    def _config_layer_vxlan(self, config):
+        return self.pktgen.vxlan(**config)
+
+    def strip_layer_element(self, layer, element):
+        """
+        Strip packet layer elements
+        return the status of configure result
+        """
+        strip_element = getattr(self, "strip_element_%s" % layer)
+
+        return strip_element(element)
+
+    def strip_element_dot1q(self, element):
+        return self.pktgen.strip_dot1q(element)
+
+
+def increment_ip_address(self, addr):
+    """
+    Returns the IP address from a given one, like
+    192.168.1.1 ->192.168.1.2
+    If disable ip hw chksum, csum routine will increase ip
+    """
+    ip2int = lambda ipstr: struct.unpack('!I', socket.inet_aton(ipstr))[0]
+    x = ip2int(addr)
+    int2ip = lambda n: socket.inet_ntoa(struct.pack('!I', n))
+    return int2ip(x + 1)
+
+
+def increment_ipv6_address(self, addr):
+    """
+    Returns the IP address from a given one, like
+    FE80:0:0:0:0:0:0:0 -> FE80::1
+    csum routine will increase ip
+    """
+    ipv6addr = struct.unpack('!8H', socket.inet_pton(AF_INET6, addr))
+    addr = list(ipv6addr)
+    addr[7] += 1
+    ipv6 = socket.inet_ntop(AF_INET6, struct.pack(
+        '!8H', addr[0], addr[1], addr[2], addr[3], addr[4], addr[5], addr[6], addr[7]))
+    return ipv6
+
+
+def sniff_packets(intf, count=0, timeout=5):
+    """
+    sniff all packets for certain port in certain seconds
+    """
+    sniff_cmd = 'tcpdump -i %(INTF)s -w %(FILE)s'
+    options = {'INTF': intf, 'COUNT': count,
+               'FILE': '/tmp/sniff_%s.pcap' % intf}
+    if count:
+        sniff_cmd += ' -c %(COUNT)d'
+        cmd = sniff_cmd % options
+    else:
+        cmd = sniff_cmd % options
+
+    args = cmd.split()
+    pipe = subprocess.Popen(args)
+    index = str(time.time())
+    SNIFF_PIDS[index] = (pipe, intf, timeout)
+    return index
+
+
+def load_sniff_packets(index=''):
+    pkts = []
+    child_exit = False
+    if index in SNIFF_PIDS.keys():
+        pipe, intf, timeout = SNIFF_PIDS[index]
+        time_elapse = int(time.time() - float(index))
+        while time_elapse < timeout:
+            if pipe.poll() is not None:
+                child_exit = True
+                break
+
+            time.sleep(1)
+            time_elapse += 1
+
+        if not child_exit:
+            pipe.kill()
+
+        # wait pcap file ready
+        time.sleep(0.5)
+        try:
+            cap_pkts = rdpcap("/tmp/sniff_%s.pcap" % intf)
+            for pkt in cap_pkts:
+                # packet gen should be scapy
+                packet = Packet(tx_port=intf)
+                packet.pktgen.assign_pkt(pkt)
+                pkts.append(packet)
+        except:
+            pass
+
+    return pkts
+
+############################################################################################################
+############################################################################################################
+if __name__ == "__main__":
+    inst = sniff_packets("lo", timeout=5)
+    time.sleep(3)
+    pkts = load_sniff_packets(inst)
+
+    pkt = Packet(pkt_type='UDP', pkt_len=1500, ran_payload=True)
+    pkt.send_pkt(tx_port='lo')
+    pkt = Packet(pkt_type='IPv6_TCP')
+    pkt.send_pkt(tx_port='lo')
+    pkt = Packet(pkt_type='IPv6_SCTP')
+    pkt.send_pkt(tx_port='lo')
+
+    pkt = Packet()
+    pkt.assign_layers(['ether', 'dot1q', 'ipv4', 'udp', 'vxlan', 'inner_mac', 'inner_ipv4', 'inner_udp', 'raw'])
+    pkt.config_layer('ether', {'dst': '00:11:22:33:44:55'})
+    pkt.config_layer('dot1q', {'vlan': 2})
+    pkt.config_layer('ipv4', {'dst': '1.1.1.1'})
+    pkt.config_layer('udp', {'src': 4789, 'dst': 4789, 'chksum': 0x1111})
+    pkt.config_layer('vxlan', {'vni': 2})
+    pkt.config_layer('raw', {'payload': ['58']*18})
-- 
1.9.3