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86 lines
2.8 KiB
86 lines
2.8 KiB
#!/usr/bin/python
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#
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# Copyright 2018 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import unittest
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import errno
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from socket import *
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import multinetwork_base
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import net_test
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_TEST_IP4_ADDR = "192.0.2.1"
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_TEST_IP6_ADDR = "2001:db8::"
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# Regression tests for interactions between kernel networking and netfilter
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#
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# These tests were added to ensure that the lookup path for local-ICMP errors
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# do not cause failures. Specifically, local-ICMP packets do not have a
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# net_device in the skb, and has been known to trigger bugs in surrounding code.
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class NetilterRejectTargetTest(multinetwork_base.MultiNetworkBaseTest):
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def setUp(self):
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multinetwork_base.MultiNetworkBaseTest.setUp(self)
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net_test.RunIptablesCommand(4, "-A OUTPUT -d " + _TEST_IP4_ADDR + " -j REJECT")
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net_test.RunIptablesCommand(6, "-A OUTPUT -d " + _TEST_IP6_ADDR + " -j REJECT")
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def tearDown(self):
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net_test.RunIptablesCommand(4, "-D OUTPUT -d " + _TEST_IP4_ADDR + " -j REJECT")
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net_test.RunIptablesCommand(6, "-D OUTPUT -d " + _TEST_IP6_ADDR + " -j REJECT")
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multinetwork_base.MultiNetworkBaseTest.tearDown(self)
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# Test a rejected TCP connect. The responding ICMP may not have skb->dev set.
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# This tests the local-ICMP output-input path.
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def CheckRejectedTcp(self, version, addr):
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sock = net_test.TCPSocket(net_test.GetAddressFamily(version))
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netid = self.RandomNetid()
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self.SelectInterface(sock, netid, "mark")
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# Expect this to fail with ICMP unreachable
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try:
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sock.connect((addr, 53))
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except IOError:
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pass
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def testRejectTcp4(self):
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self.CheckRejectedTcp(4, _TEST_IP4_ADDR)
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def testRejectTcp6(self):
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self.CheckRejectedTcp(6, _TEST_IP6_ADDR)
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# Test a rejected UDP connect. The responding ICMP may not have skb->dev set.
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# This tests the local-ICMP output-input path.
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def CheckRejectedUdp(self, version, addr):
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sock = net_test.UDPSocket(net_test.GetAddressFamily(version))
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netid = self.RandomNetid()
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self.SelectInterface(sock, netid, "mark")
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# Expect this to fail with ICMP unreachable
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try:
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sock.sendto(net_test.UDP_PAYLOAD, (addr, 53))
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except IOError:
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pass
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def testRejectUdp4(self):
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self.CheckRejectedUdp(4, _TEST_IP4_ADDR)
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def testRejectUdp6(self):
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self.CheckRejectedUdp(6, _TEST_IP6_ADDR)
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if __name__ == "__main__":
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unittest.main() |