2 # Copyright (c) 2017 Cisco and/or its affiliates.
3 # Licensed under the Apache License, Version 2.0 (the "License");
4 # you may not use this file except in compliance with the License.
5 # You may obtain a copy of the License at:
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS,
11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 # See the License for the specific language governing permissions and
13 # limitations under the License.
16 Traffic script that sends an TCP packet
21 from scapy.all import Ether, Packet, Raw
22 from scapy.layers.inet import IP, TCP
23 from scapy.layers.inet6 import IPv6, ICMPv6ND_NS
25 from resources.libraries.python.SFC.VerifyPacket import *
26 from resources.libraries.python.SFC.SFCConstants import SFCConstants as SfcCon
27 from resources.libraries.python.TrafficScriptArg import TrafficScriptArg
28 from resources.libraries.python.PacketVerifier import RxQueue, TxQueue
32 """Send TCP packet from one traffic generator interface to DUT.
34 :raises: If the IP address is invalid.
36 args = TrafficScriptArg(['src_mac', 'dst_mac', 'src_ip', 'dst_ip',
37 'timeout', 'framesize', 'testtype'])
39 src_mac = args.get_arg('src_mac')
40 dst_mac = args.get_arg('dst_mac')
41 src_ip = args.get_arg('src_ip')
42 dst_ip = args.get_arg('dst_ip')
43 tx_if = args.get_arg('tx_if')
44 rx_if = args.get_arg('rx_if')
45 timeout = int(args.get_arg('timeout'))
46 frame_size = int(args.get_arg('framesize'))
47 test_type = args.get_arg('testtype')
54 source_port = SfcCon.DEF_SRC_PORT
55 destination_port = SfcCon.DEF_DST_PORT
57 if valid_ipv4(src_ip) and valid_ipv4(dst_ip):
59 elif valid_ipv6(src_ip) and valid_ipv6(dst_ip):
62 raise ValueError("Invalid IP version!")
64 pkt_header = (Ether(src=src_mac, dst=dst_mac) /
65 ip_version(src=src_ip, dst=dst_ip) /
66 protocol(sport=int(source_port), dport=int(destination_port)))
68 fsize_no_fcs = frame_size - 4
69 pad_len = max(0, fsize_no_fcs - len(pkt_header))
70 pad_data = "A" * pad_len
72 pkt_raw = pkt_header / Raw(load=pad_data)
74 # Send created packet on one interface and receive on the other
75 sent_packets.append(pkt_raw)
79 ether = rxq.recv(timeout)
81 raise RuntimeError('No packet is received!')
83 if ether.haslayer(ICMPv6ND_NS):
84 # read another packet in the queue if the current one is ICMPv6ND_NS
87 # otherwise process the current packet
90 # let us begin to check the NSH SFC loopback packet
91 VerifyPacket.check_the_nsh_sfc_packet(ether, frame_size, test_type)
93 # we check all the fields about the loopback packet, this test will pass
97 if __name__ == "__main__":