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#!/usr/bin/python3
#
# Copyright 2016 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from errno import * # pylint: disable=wildcard-import
from socket import * # pylint: disable=wildcard-import
import threading
import time
import unittest
import csocket
import net_test
class LeakTest(net_test.NetworkTest):
def testRecvfromLeak(self):
s = socket(AF_INET6, SOCK_DGRAM, 0)
s.bind(("::1", 0))
# Call shutdown on another thread while a recvfrom is in progress.
csocket.SetSocketTimeout(s, 2000)
def ShutdownSocket():
time.sleep(0.5)
self.assertRaisesErrno(ENOTCONN, s.shutdown, SHUT_RDWR)
t = threading.Thread(target=ShutdownSocket)
t.start()
# This could have been written with just "s.recvfrom", but because we're
# testing for a bug where the kernel returns garbage, it's probably safer
# to call the syscall directly.
data, addr = csocket.Recvfrom(s, 4096)
self.assertEqual(b"", data)
self.assertEqual(None, addr)
class ForceSocketBufferOptionTest(net_test.NetworkTest):
SO_SNDBUFFORCE = 32
SO_RCVBUFFORCE = 33
def CheckForceSocketBufferOption(self, option, force_option):
s = socket(AF_INET6, SOCK_DGRAM, 0)
# Find the minimum buffer value.
s.setsockopt(SOL_SOCKET, option, 0)
minbuf = s.getsockopt(SOL_SOCKET, option)
# Check that the force option works to set reasonable values.
val = 4097
self.assertGreater(2 * val, minbuf)
s.setsockopt(SOL_SOCKET, force_option, val)
self.assertEqual(2 * val, s.getsockopt(SOL_SOCKET, option))
# Check that the force option sets at least the minimum value instead
# of a negative value on integer overflow. Because the kernel multiplies
# passed-in values by 2, pick a value that becomes a small negative number
# if treated as unsigned.
bogusval = 2 ** 31 - val
s.setsockopt(SOL_SOCKET, force_option, bogusval)
self.assertLessEqual(minbuf, s.getsockopt(SOL_SOCKET, option))
def testRcvBufForce(self):
self.CheckForceSocketBufferOption(SO_RCVBUF, self.SO_RCVBUFFORCE)
def testSndBufForce(self):
self.CheckForceSocketBufferOption(SO_SNDBUF, self.SO_SNDBUFFORCE)
if __name__ == "__main__":
unittest.main()
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