test/test_interface_crud.py

   1 #!/usr/bin/env python
   2 """CRUD tests of APIs (Create, Read, Update, Delete) HLD:
   3
   4 - interface up/down/add/delete - interface type:
   5     - pg (TBD)
   6     - loopback
   7     - vhostuser (TBD)
   8     - af_packet (TBD)
   9     - netmap (TBD)
  10     - tuntap (root privileges needed)
  11     - vxlan (TBD)
  12 """
  13
  14 import unittest
  15
  16 from scapy.layers.inet import IP, ICMP
  17 from scapy.layers.l2 import Ether
  18
  19 from framework import VppTestCase, VppTestRunner
  20
  21
  22 class TestLoopbackInterfaceCRUD(VppTestCase):
  23     """CRUD Loopback
  24
  25     """
  26
  27     @classmethod
  28     def setUpClass(cls):
  29         super(TestLoopbackInterfaceCRUD, cls).setUpClass()
  30         try:
  31             cls.create_pg_interfaces(range(1))
  32             for i in cls.pg_interfaces:
  33                 i.config_ip4()
  34                 i.resolve_arp()
  35         except:
  36             cls.tearDownClass()
  37             raise
  38
  39     @staticmethod
  40     def create_icmp_stream(src_if, dst_ifs):
  41         """
  42
  43         :param VppInterface src_if: Packets are send to this interface,
  44             using this interfaces remote host.
  45         :param list dst_ifs: IPv4 ICMP requests are send to interfaces
  46             addresses.
  47         :return: List of generated packets.
  48         """
  49         pkts = []
  50         for i in dst_ifs:
  51             p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
  52                  IP(src=src_if.remote_ip4, dst=i.local_ip4) /
  53                  ICMP(id=i.sw_if_index, type='echo-request'))
  54             pkts.append(p)
  55         return pkts
  56
  57     def verify_icmp(self, capture, request_src_if, dst_ifs):
  58         """
  59
  60         :param capture: Capture to verify.
  61         :param VppInterface request_src_if: Interface where was send packets.
  62         :param list dst_ifs: Interfaces where was generated IPv4 ICMP requests.
  63         """
  64         rcvd_icmp_pkts = []
  65         for pkt in capture:
  66             try:
  67                 ip = pkt[IP]
  68                 icmp = pkt[ICMP]
  69             except IndexError:
  70                 pass
  71             else:
  72                 info = (ip.src, ip.dst, icmp.type, icmp.id)
  73                 rcvd_icmp_pkts.append(info)
  74
  75         for i in dst_ifs:
  76             # 0 - icmp echo response
  77             info = (i.local_ip4, request_src_if.remote_ip4, 0, i.sw_if_index)
  78             self.assertIn(info, rcvd_icmp_pkts)
  79
  80     def test_crud(self):
  81         # create
  82         loopbacks = self.create_loopback_interfaces(range(20))
  83         for i in loopbacks:
  84             i.local_ip4_prefix_len = 32
  85             i.config_ip4()
  86             i.admin_up()
  87
  88         # read (check sw if dump, ip4 fib, ip6 fib)
  89         if_dump = self.vapi.sw_interface_dump()
  90         fib4_dump = self.vapi.ip_fib_dump()
  91         for i in loopbacks:
  92             self.assertTrue(i.is_interface_config_in_dump(if_dump))
  93             self.assertTrue(i.is_ip4_entry_in_fib_dump(fib4_dump))
  94
  95         # check ping
  96         stream = self.create_icmp_stream(self.pg0, loopbacks)
  97         self.pg0.add_stream(stream)
  98         self.pg_enable_capture(self.pg_interfaces)
  99         self.pg_start()
 100         capture = self.pg0.get_capture(expected_count=len(stream))
 101
 102         self.verify_icmp(capture, self.pg0, loopbacks)
 103
 104         # delete
 105         for i in loopbacks:
 106             i.remove_vpp_config()
 107
 108         # read (check not in sw if dump, ip4 fib, ip6 fib)
 109         if_dump = self.vapi.sw_interface_dump()
 110         fib4_dump = self.vapi.ip_fib_dump()
 111         for i in loopbacks:
 112             self.assertFalse(i.is_interface_config_in_dump(if_dump))
 113             self.assertFalse(i.is_ip4_entry_in_fib_dump(fib4_dump))
 114
 115         #  check not ping
 116         stream = self.create_icmp_stream(self.pg0, loopbacks)
 117         self.pg0.add_stream(stream)
 118         self.pg_enable_capture(self.pg_interfaces)
 119         self.pg_start()
 120         self.pg0.assert_nothing_captured()
 121
 122     def test_down(self):
 123         # create
 124         loopbacks = self.create_loopback_interfaces(range(20))
 125         for i in loopbacks:
 126             i.local_ip4_prefix_len = 32
 127             i.config_ip4()
 128             i.admin_up()
 129
 130         # disable
 131         for i in loopbacks:
 132             i.admin_down()
 133             i.unconfig_ip4()
 134
 135         # read (check not in sw if dump, ip4 fib, ip6 fib)
 136         if_dump = self.vapi.sw_interface_dump()
 137         fib4_dump = self.vapi.ip_fib_dump()
 138         for i in loopbacks:
 139             self.assertTrue(i.is_interface_config_in_dump(if_dump))
 140             self.assertFalse(i.is_ip4_entry_in_fib_dump(fib4_dump))
 141
 142         #  check not ping
 143         stream = self.create_icmp_stream(self.pg0, loopbacks)
 144         self.pg0.add_stream(stream)
 145         self.pg_enable_capture(self.pg_interfaces)
 146         self.pg_start()
 147         self.pg0.assert_nothing_captured()
 148
 149
 150 if __name__ == '__main__':
 151     unittest.main(testRunner=VppTestRunner)