6 from framework import VppTestCase, VppTestRunner
7 from vpp_sub_interface import VppSubInterface, VppDot1QSubint, VppDot1ADSubint
9 from scapy.packet import Raw
10 from scapy.layers.l2 import Ether, Dot1Q
11 from scapy.layers.inet import IP, UDP
15 class TestIPv4(VppTestCase):
16 """ IPv4 Test Case """
20 Perform test setup before test case.
23 - create 3 pg interfaces
24 - untagged pg0 interface
25 - Dot1Q subinterface on pg1
26 - Dot1AD subinterface on pg2
28 - put it into UP state
30 - resolve neighbor address using ARP
31 - configure 200 fib entries
33 :ivar list interfaces: pg interfaces and subinterfaces.
34 :ivar dict flows: IPv4 packet flows in test.
35 :ivar list pg_if_packet_sizes: packet sizes in test.
37 super(TestIPv4, self).setUp()
39 # create 3 pg interfaces
40 self.create_pg_interfaces(range(3))
42 # create 2 subinterfaces for pg1 and pg2
43 self.sub_interfaces = [
44 VppDot1QSubint(self, self.pg1, 100),
45 VppDot1ADSubint(self, self.pg2, 200, 300, 400)]
47 # packet flows mapping pg0 -> pg1.sub, pg2.sub, etc.
49 self.flows[self.pg0] = [self.pg1.sub_if, self.pg2.sub_if]
50 self.flows[self.pg1.sub_if] = [self.pg0, self.pg2.sub_if]
51 self.flows[self.pg2.sub_if] = [self.pg0, self.pg1.sub_if]
54 self.pg_if_packet_sizes = [64, 512, 1518, 9018]
55 self.sub_if_packet_sizes = [64, 512, 1518 + 4, 9018 + 4]
57 self.interfaces = list(self.pg_interfaces)
58 self.interfaces.extend(self.sub_interfaces)
60 # setup all interfaces
61 for i in self.interfaces:
66 # config 2M FIB entries
67 self.config_fib_entries(200)
70 """Run standard test teardown and log ``show ip arp``."""
71 super(TestIPv4, self).tearDown()
73 self.logger.info(self.vapi.cli("show ip arp"))
74 # info(self.vapi.cli("show ip fib")) # many entries
76 def config_fib_entries(self, count):
77 """For each interface add to the FIB table *count* routes to
78 "10.0.0.1/32" destination with interface's local address as next-hop
81 :param int count: Number of FIB entries.
83 - *TODO:* check if the next-hop address shouldn't be remote address
84 instead of local address.
86 n_int = len(self.interfaces)
89 dest_addr = socket.inet_pton(socket.AF_INET, "10.0.0.1")
91 for i in self.interfaces:
92 next_hop_address = i.local_ip4n
93 for j in range(count / n_int):
94 self.vapi.ip_add_del_route(
95 dest_addr, dest_addr_len, next_hop_address)
97 if counter / count * 100 > percent:
98 self.logger.info("Configure %d FIB entries .. %d%% done" %
102 def create_stream(self, src_if, packet_sizes):
103 """Create input packet stream for defined interface.
105 :param VppInterface src_if: Interface to create packet stream for.
106 :param list packet_sizes: Required packet sizes.
109 for i in range(0, 257):
110 dst_if = self.flows[src_if][i % 2]
111 info = self.create_packet_info(
112 src_if.sw_if_index, dst_if.sw_if_index)
113 payload = self.info_to_payload(info)
114 p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
115 IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) /
116 UDP(sport=1234, dport=1234) /
119 if isinstance(src_if, VppSubInterface):
120 p = src_if.add_dot1_layer(p)
121 size = packet_sizes[(i // 2) % len(packet_sizes)]
122 self.extend_packet(p, size)
126 def verify_capture(self, dst_if, capture):
127 """Verify captured input packet stream for defined interface.
129 :param VppInterface dst_if: Interface to verify captured packet stream
131 :param list capture: Captured packet stream.
133 self.logger.info("Verifying capture on interface %s" % dst_if.name)
135 for i in self.interfaces:
136 last_info[i.sw_if_index] = None
138 dst_sw_if_index = dst_if.sw_if_index
139 if hasattr(dst_if, 'parent'):
141 for packet in capture:
143 # Check VLAN tags and Ethernet header
144 packet = dst_if.remove_dot1_layer(packet)
145 self.assertTrue(Dot1Q not in packet)
149 payload_info = self.payload_to_info(str(packet[Raw]))
150 packet_index = payload_info.index
151 self.assertEqual(payload_info.dst, dst_sw_if_index)
152 self.logger.debug("Got packet on port %s: src=%u (id=%u)" %
153 (dst_if.name, payload_info.src, packet_index))
154 next_info = self.get_next_packet_info_for_interface2(
155 payload_info.src, dst_sw_if_index,
156 last_info[payload_info.src])
157 last_info[payload_info.src] = next_info
158 self.assertTrue(next_info is not None)
159 self.assertEqual(packet_index, next_info.index)
160 saved_packet = next_info.data
161 # Check standard fields
162 self.assertEqual(ip.src, saved_packet[IP].src)
163 self.assertEqual(ip.dst, saved_packet[IP].dst)
164 self.assertEqual(udp.sport, saved_packet[UDP].sport)
165 self.assertEqual(udp.dport, saved_packet[UDP].dport)
167 self.logger.error(ppp("Unexpected or invalid packet:", packet))
169 for i in self.interfaces:
170 remaining_packet = self.get_next_packet_info_for_interface2(
171 i.sw_if_index, dst_sw_if_index, last_info[i.sw_if_index])
172 self.assertTrue(remaining_packet is None,
173 "Interface %s: Packet expected from interface %s "
174 "didn't arrive" % (dst_if.name, i.name))
181 - Create IPv4 stream for pg0 interface
182 - Create IPv4 tagged streams for pg1's and pg2's subinterface.
183 - Send and verify received packets on each interface.
186 pkts = self.create_stream(self.pg0, self.pg_if_packet_sizes)
187 self.pg0.add_stream(pkts)
189 for i in self.sub_interfaces:
190 pkts = self.create_stream(i, self.sub_if_packet_sizes)
191 i.parent.add_stream(pkts)
193 self.pg_enable_capture(self.pg_interfaces)
196 pkts = self.pg0.get_capture()
197 self.verify_capture(self.pg0, pkts)
199 for i in self.sub_interfaces:
200 pkts = i.parent.get_capture()
201 self.verify_capture(i, pkts)
204 if __name__ == '__main__':
205 unittest.main(testRunner=VppTestRunner)