1#!/usr/bin/python3 2# 3# Copyright 2021 The Android Open Source Project 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17import unittest 18 19import net_test 20 21 22class SysctlsTest(net_test.NetworkTest): 23 24 def check(self, f): 25 with open(f) as algs_file: 26 algs = algs_file.readline().strip().split(' ') 27 bad_algs = [a for a in algs if a not in ['cubic', 'reno']] 28 msg = ("Obsolete TCP congestion control algorithm found. These " 29 "algorithms will decrease real-world networking performance for " 30 "users and must be disabled. Found: %s" % bad_algs) 31 self.assertEqual(bad_algs, [], msg) 32 33 @unittest.skipUnless(net_test.LINUX_VERSION >= (5, 7, 0), "not yet namespaced") 34 def testAllowedCongestionControl(self): 35 self.check('/proc/sys/net/ipv4/tcp_allowed_congestion_control') 36 37 @unittest.skipUnless(net_test.LINUX_VERSION >= (5, 7, 0), "not yet namespaced") 38 def testAvailableCongestionControl(self): 39 self.check('/proc/sys/net/ipv4/tcp_available_congestion_control') 40 41 @unittest.skipUnless(net_test.LINUX_VERSION >= (4, 15, 0), "not yet namespaced") 42 def testCongestionControl(self): 43 self.check('/proc/sys/net/ipv4/tcp_congestion_control') 44 45 46if __name__ == "__main__": 47 unittest.main() 48