mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2024-12-24 06:52:37 +01:00
e28243a584
Previously we had an ACD failure scenario where a new client forces its IP to create an IP conflict and an already-connected client detects the conflict and reacts. Now first test a scenario where a newly connecting IWD client runs ACD before setting its statically configured IP, detects a conflict and refuses to continue, then run the second scenario where the newly connecting DHCP-configured client ignores the conflict and starts ACD in defend-indefinitely mode and the older client in defent-once mode gives up its IP.
188 lines
7.9 KiB
Python
188 lines
7.9 KiB
Python
#!/usr/bin/python3
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import unittest
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import sys
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sys.path.append('../util')
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import iwd
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from iwd import IWD
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from iwd import PSKAgent
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from iwd import NetworkType
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from hostapd import HostapdCLI
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import testutil
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from config import ctx
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import os
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import socket
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import gc
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class Test(unittest.TestCase):
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def test_connection_success(self):
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# Use a non-default storage_dir for one of the instances, the default for the other one
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iwd_main = IWD(True, iwd_storage_dir='/tmp/storage-main')
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psk_agent_main = PSKAgent("secret123")
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iwd_main.register_psk_agent(psk_agent_main)
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dev1 = iwd_main.list_devices(1)[0]
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ordered_network = dev1.get_ordered_network('ap-main')
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self.assertEqual(ordered_network.type, NetworkType.psk)
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condition = 'not obj.connected'
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iwd_main.wait_for_object_condition(ordered_network.network_object, condition)
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ordered_network.network_object.connect()
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condition = 'obj.state == DeviceState.connected'
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iwd_main.wait_for_object_condition(dev1, condition)
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testutil.test_iface_operstate()
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testutil.test_ifaces_connected()
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testutil.test_ip_address_match(dev1.name, '192.168.1.10', 25)
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testutil.test_ip_address_match(dev1.name, '3ffe:501:ffff:200::10', 80)
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ifname = str(dev1.name)
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# Since we're in an isolated VM with freshly created interfaces we know any routes
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# will have been created by IWD and don't have to allow for pre-existing routes
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# in the table.
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# Flags: 1=RTF_UP, 2=RTF_GATEWAY
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expected_routes4 = {
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testutil.RouteInfo(gw=socket.inet_pton(socket.AF_INET, '192.168.1.3'),
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flags=3, ifname=ifname),
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testutil.RouteInfo(dst=socket.inet_pton(socket.AF_INET, '192.168.1.0'), plen=25,
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flags=1, ifname=ifname)
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}
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expected_routes6 = {
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testutil.RouteInfo(gw=socket.inet_pton(socket.AF_INET6, '3ffe:501:ffff:200::3'),
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flags=3, ifname=ifname),
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testutil.RouteInfo(dst=socket.inet_pton(socket.AF_INET6, '3ffe:501:ffff:200::'), plen=80,
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flags=1, ifname=ifname),
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}
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self.maxDiff = None
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self.assertEqual(expected_routes4, set(testutil.get_routes4(ifname)))
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self.assertEqual(expected_routes6, set(testutil.get_routes6(ifname)))
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rclog = open('/tmp/resolvconf.log', 'r')
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entries = rclog.readlines()
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rclog.close()
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expected_rclog = ['-a %s.dns\n' % ifname, 'nameserver 192.168.1.4\n', 'nameserver 3ffe:501:ffff:200::4\n']
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# Every resolvconf -a run overwrites the previous settings. Check the last three lines
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# of the log since we care about the end result here.
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self.assertEqual(expected_rclog, entries[-3:])
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# Run our second client in a separate namespace to allow ACD (ARP) to
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# work, and also be able to set identical IPs on both interfaces for
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# the next part of this test.
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ns0 = ctx.get_namespace('ns0')
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iwd_ns0_1 = IWD(True, namespace=ns0, iwd_storage_dir='/tmp/storage-ns0-1')
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psk_agent_ns0_1 = PSKAgent("secret123", namespace=ns0)
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iwd_ns0_1.register_psk_agent(psk_agent_ns0_1)
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dev2 = iwd_ns0_1.list_devices(1)[0]
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ordered_network = dev2.get_ordered_network('ap-main')
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condition = 'not obj.connected'
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iwd_ns0_1.wait_for_object_condition(ordered_network.network_object, condition)
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# Attempt a connection to the same AP that iwd_main is connected to
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# using the same static config. The new client's ACD client should
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# detect an IP conflict and not allow the device to reach the
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# "connected" state although the DBus .Connect call will succeed.
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ordered_network.network_object.connect()
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self.assertEqual(dev2.state, iwd.DeviceState.connecting)
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try:
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# We should either stay in "connecting" indefinitely or move to
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# "disconnecting"
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condition = 'obj.state != DeviceState.connecting'
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iwd_ns0_1.wait_for_object_condition(dev2, condition, max_wait=21)
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self.assertEqual(dev2.state, iwd.DeviceState.disconnecting)
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except TimeoutError:
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dev2.disconnect()
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iwd_ns0_1.unregister_psk_agent(psk_agent_ns0_1)
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del dev2
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# Note: if any references to iwd_ns0_1 are left, the "del iwd_ns0_1"
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# will not kill the IWD process the iwd_ns0_2 initialization will raise
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# an exception. The iwd_ns0_1.wait_for_object_condition() above
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# creates a circular reference (which is not wrong in itself) and
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# gc.collect() gets rid of it. The actual solution is to eventually
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# avoid executing anything important in .__del__ (which is wrong.)
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gc.collect()
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del iwd_ns0_1
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iwd_ns0_2 = IWD(True, namespace=ns0, iwd_storage_dir='/tmp/storage-ns0-2')
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psk_agent_ns0_2 = PSKAgent("secret123", namespace=ns0)
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iwd_ns0_2.register_psk_agent(psk_agent_ns0_2)
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dev2 = iwd_ns0_2.list_devices(1)[0]
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ordered_network = dev2.get_ordered_network('ap-main')
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condition = 'not obj.connected'
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iwd_ns0_2.wait_for_object_condition(ordered_network.network_object, condition)
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# Connect to the same network from a dynamically configured client. We
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# block ICMP pings so that the DHCP server can't confirm that
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# 192.168.1.10 is in use by dev1 and if it assigns dev2 the lowest
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# available address, that's going to be 192.168.1.10. We also keep the
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# second client's netdev in a separate namespace so that the kernel
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# lets us assign the same IP. dev1's ACD implementation should then
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# stop using this address. Yes, a quite unrealistic scenario but this
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# lets us test our reaction to a conflict appearing after successful
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# initial setup.
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os.system("echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all")
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ordered_network.network_object.connect()
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condition = 'obj.state == DeviceState.connected'
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iwd_ns0_2.wait_for_object_condition(dev2, condition)
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iwd_main.wait(1)
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# Check dev1 is now disconnected or without its IPv4 address
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if dev1.state == iwd.DeviceState.connected:
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testutil.test_ip_address_match(dev1.name, None)
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dev1.disconnect()
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dev2.disconnect()
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condition = 'not obj.connected'
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iwd_main.wait_for_object_condition(ordered_network.network_object, condition)
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iwd_main.unregister_psk_agent(psk_agent_main)
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@classmethod
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def setUpClass(cls):
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def remove_lease():
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try:
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os.remove('/tmp/dhcpd.leases')
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os.remove('/tmp/dhcpd.leases~')
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except:
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pass
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hapd = HostapdCLI('ap-main.conf')
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# TODO: This could be moved into test-runner itself if other tests ever
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# require this functionality (p2p, FILS, etc.). Since it's simple
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# enough it can stay here for now.
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ctx.start_process(['ip', 'addr','add', '192.168.1.1/255.255.128.0',
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'dev', hapd.ifname]).wait()
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ctx.start_process(['touch', '/tmp/dhcpd.leases']).wait()
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cls.dhcpd_pid = ctx.start_process(['dhcpd', '-f', '-cf', '/tmp/dhcpd.conf',
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'-lf', '/tmp/dhcpd.leases',
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hapd.ifname], cleanup=remove_lease)
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IWD.copy_to_storage('static.psk', '/tmp/storage-main', 'ap-main.psk')
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IWD.copy_to_storage('static.psk', '/tmp/storage-ns0-1', 'ap-main.psk')
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cls.orig_path = os.environ['PATH']
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os.environ['PATH'] = '/tmp/test-bin:' + os.environ['PATH']
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IWD.copy_to_storage('resolvconf', '/tmp/test-bin')
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@classmethod
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def tearDownClass(cls):
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cls.dhcpd_pid.kill()
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os.system('rm -rf /tmp/resolvconf.log /tmp/test-bin /tmp/storage-*')
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os.environ['PATH'] = cls.orig_path
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if __name__ == '__main__':
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unittest.main(exit=True)
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