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113 lines
3.5 KiB
113 lines
3.5 KiB
#!/usr/bin/python
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#
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# Copyright 2017 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 errno
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import fcntl
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from socket import * # pylint: disable=wildcard-import
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import unittest
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import csocket
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import cstruct
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import net_test
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IPV4_LOOPBACK_ADDR = "127.0.0.1"
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IPV6_LOOPBACK_ADDR = "::1"
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LOOPBACK_DEV = "lo"
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LOOPBACK_IFINDEX = 1
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SIOCKILLADDR = 0x8939
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Ifreq = cstruct.Struct("Ifreq", "=16s16s", "name data")
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In6Ifreq = cstruct.Struct("In6Ifreq", "=16sIi", "addr prefixlen ifindex")
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def KillAddrIoctl(addr):
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"""Calls the SIOCKILLADDR ioctl on the provided IP address.
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Args:
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addr The IP address to pass to the ioctl.
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Raises:
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ValueError: If addr is of an unsupported address family.
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"""
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family, _, _, _, _ = getaddrinfo(addr, None, AF_UNSPEC, SOCK_DGRAM, 0,
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AI_NUMERICHOST)[0]
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if family == AF_INET6:
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addr = inet_pton(AF_INET6, addr)
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ifreq = In6Ifreq((addr, 128, LOOPBACK_IFINDEX)).Pack()
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elif family == AF_INET:
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addr = inet_pton(AF_INET, addr)
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sockaddr = csocket.SockaddrIn((AF_INET, 0, addr)).Pack()
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ifreq = Ifreq((LOOPBACK_DEV, sockaddr)).Pack()
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else:
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raise ValueError('Address family %r not supported.' % family)
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datagram_socket = socket(family, SOCK_DGRAM)
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try:
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fcntl.ioctl(datagram_socket.fileno(), SIOCKILLADDR, ifreq)
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finally:
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datagram_socket.close()
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# For convenience.
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def CreateIPv4SocketPair():
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return net_test.CreateSocketPair(AF_INET, SOCK_STREAM, IPV4_LOOPBACK_ADDR)
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def CreateIPv6SocketPair():
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return net_test.CreateSocketPair(AF_INET6, SOCK_STREAM, IPV6_LOOPBACK_ADDR)
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@unittest.skipUnless(net_test.LINUX_VERSION >= (4, 4, 0), "grace period")
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class TcpNukeAddrTest(net_test.NetworkTest):
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"""Tests that SIOCKILLADDR no longer exists.
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The out-of-tree SIOCKILLADDR was replaced by the upstream SOCK_DESTROY
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operation in Linux 4.5. It was backported to common Android trees all the way
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back to android-3.10 and is required by CTS from Android N onwards.
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This test ensures that it no longer works in 4.4 and above kernels.
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Relevant kernel commits:
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android-4.4:
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3094efd84c Revert "net: socket ioctl to reset connections matching local address"
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"""
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def CheckNukeAddrUnsupported(self, socketpair, addr):
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s1, s2 = socketpair
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self.assertRaisesErrno(errno.ENOTTY, KillAddrIoctl, addr)
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data = "foo"
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try:
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self.assertEqual(len(data), s1.send(data))
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self.assertEqual(data, s2.recv(4096))
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self.assertSocketsNotClosed(socketpair)
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finally:
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s1.close()
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s2.close()
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def assertSocketsNotClosed(self, socketpair):
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for sock in socketpair:
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self.assertTrue(sock.getpeername())
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def testIpv4Unsupported(self):
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self.CheckNukeAddrUnsupported(CreateIPv4SocketPair(), IPV4_LOOPBACK_ADDR)
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self.CheckNukeAddrUnsupported(CreateIPv4SocketPair(), "0.0.0.0")
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def testIpv6Unsupported(self):
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self.CheckNukeAddrUnsupported(CreateIPv6SocketPair(), IPV6_LOOPBACK_ADDR)
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self.CheckNukeAddrUnsupported(CreateIPv6SocketPair(), "::")
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if __name__ == "__main__":
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unittest.main()
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