#!/usr/bin/python
#
# Copyright 2015 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.
# pylint: disable=g-bad-todo,g-bad-file-header,wildcard-import
from errno import * # pylint: disable=wildcard-import
import os
import random
import re
from socket import * # pylint: disable=wildcard-import
import threading
import time
import unittest
import multinetwork_base
import net_test
import netlink
import packets
import sock_diag
import tcp_test
NUM_SOCKETS = 30
NO_BYTECODE = ""
class SockDiagBaseTest(multinetwork_base.MultiNetworkBaseTest):
"""Basic tests for SOCK_DIAG functionality.
Relevant kernel commits:
android-3.4:
ab4a727 net: inet_diag: zero out uninitialized idiag_{src,dst} fields
99ee451 net: diag: support v4mapped sockets in inet_diag_find_one_icsk()
android-3.10:
3eb409b net: inet_diag: zero out uninitialized idiag_{src,dst} fields
f77e059 net: diag: support v4mapped sockets in inet_diag_find_one_icsk()
android-3.18:
e603010 net: diag: support v4mapped sockets in inet_diag_find_one_icsk()
android-4.4:
525ee59 net: diag: support v4mapped sockets in inet_diag_find_one_icsk()
"""
@staticmethod
def _CreateLotsOfSockets(socktype):
# Dict mapping (addr, sport, dport) tuples to socketpairs.
socketpairs = {}
for _ in xrange(NUM_SOCKETS):
family, addr = random.choice([
(AF_INET, "127.0.0.1"),
(AF_INET6, "::1"),
(AF_INET6, "::ffff:127.0.0.1")])
socketpair = net_test.CreateSocketPair(family, socktype, addr)
sport, dport = (socketpair[0].getsockname()[1],
socketpair[1].getsockname()[1])
socketpairs[(addr, sport, dport)] = socketpair
return socketpairs
def assertSocketClosed(self, sock):
self.assertRaisesErrno(ENOTCONN, sock.getpeername)
def assertSocketConnected(self, sock):
sock.getpeername() # No errors? Socket is alive and connected.
def assertSocketsClosed(self, socketpair):
for sock in socketpair:
self.assertSocketClosed(sock)
def assertMarkIs(self, mark, attrs):
self.assertEqual(mark, attrs.get("INET_DIAG_MARK", None))
def assertSockInfoMatchesSocket(self, s, info):
diag_msg, attrs = info
family = s.getsockopt(net_test.SOL_SOCKET, net_test.SO_DOMAIN)
self.assertEqual(diag_msg.family, family)
src, sport = s.getsockname()[0:2]
self.assertEqual(diag_msg.id.src, self.sock_diag.PaddedAddress(src))
self.assertEqual(diag_msg.id.sport, sport)
if self.sock_diag.GetDestinationAddress(diag_msg) not in ["0.0.0.0", "::"]:
dst, dport = s.getpeername()[0:2]
self.assertEqual(diag_msg.id.dst, self.sock_diag.PaddedAddress(dst))
self.assertEqual(diag_msg.id.dport, dport)
else:
self.assertRaisesErrno(ENOTCONN, s.getpeername)
mark = s.getsockopt(SOL_SOCKET, net_test.SO_MARK)
self.assertMarkIs(mark, attrs)
def PackAndCheckBytecode(self, instructions):
bytecode = self.sock_diag.PackBytecode(instructions)
decoded = self.sock_diag.DecodeBytecode(bytecode)
self.assertEquals(len(instructions), len(decoded))
self.assertFalse("???" in decoded)
return bytecode
def CloseDuringBlockingCall(self, sock, call, expected_errno):
thread = SocketExceptionThread(sock, call)
thread.start()
time.sleep(0.1)
self.sock_diag.CloseSocketFromFd(sock)
thread.join(1)
self.assertFalse(thread.is_alive())
self.assertIsNotNone(thread.exception)
self.assertTrue(isinstance(thread.exception, IOError),
"Expected IOError, got %s" % thread.exception)
self.assertEqual(expected_errno, thread.exception.errno)
self.assertSocketClosed(sock)
def setUp(self):
super(SockDiagBaseTest, self).setUp()
self.sock_diag = sock_diag.SockDiag()
self.socketpairs = {}
def tearDown(self):
for socketpair in self.socketpairs.values():
for s in socketpair:
s.close()
super(SockDiagBaseTest, self).tearDown()
class SockDiagTest(SockDiagBaseTest):
def testFindsMappedSockets(self):
"""Tests that inet_diag_find_one_icsk can find mapped sockets."""
socketpair = net_test.CreateSocketPair(AF_INET6, SOCK_STREAM,
"::ffff:127.0.0.1")
for sock in socketpair:
diag_msg = self.sock_diag.FindSockDiagFromFd(sock)
diag_req = self.sock_diag.DiagReqFromDiagMsg(diag_msg, IPPROTO_TCP)
self.sock_diag.GetSockInfo(diag_req)
# No errors? Good.
def testFindsAllMySockets(self):
"""Tests that basic socket dumping works."""
self.socketpairs = self._CreateLotsOfSockets(SOCK_STREAM)
sockets = self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, NO_BYTECODE)
self.assertGreaterEqual(len(sockets), NUM_SOCKETS)
# Find the cookies for all of our sockets.
cookies = {}
for diag_msg, unused_attrs in sockets:
addr = self.sock_diag.GetSourceAddress(diag_msg)
sport = diag_msg.id.sport
dport = diag_msg.id.dport
if (addr, sport, dport) in self.socketpairs:
cookies[(addr, sport, dport)] = diag_msg.id.cookie
elif (addr, dport, sport) in self.socketpairs:
cookies[(addr, sport, dport)] = diag_msg.id.cookie
# Did we find all the cookies?
self.assertEquals(2 * NUM_SOCKETS, len(cookies))
socketpairs = self.socketpairs.values()
random.shuffle(socketpairs)
for socketpair in socketpairs:
for sock in socketpair:
# Check that we can find a diag_msg by scanning a dump.
self.assertSockInfoMatchesSocket(
sock,
self.sock_diag.FindSockInfoFromFd(sock))
cookie = self.sock_diag.FindSockDiagFromFd(sock).id.cookie
# Check that we can find a diag_msg once we know the cookie.
req = self.sock_diag.DiagReqFromSocket(sock)
req.id.cookie = cookie
info = self.sock_diag.GetSockInfo(req)
self.assertSockInfoMatchesSocket(sock, info)
def testBytecodeCompilation(self):
# pylint: disable=bad-whitespace
instructions = [
(sock_diag.INET_DIAG_BC_S_GE, 1, 8, 0), # 0
(sock_diag.INET_DIAG_BC_D_LE, 1, 7, 0xffff), # 8
(sock_diag.INET_DIAG_BC_S_COND, 1, 2, ("::1", 128, -1)), # 16
(sock_diag.INET_DIAG_BC_JMP, 1, 3, None), # 44
(sock_diag.INET_DIAG_BC_S_COND, 2, 4, ("127.0.0.1", 32, -1)), # 48
(sock_diag.INET_DIAG_BC_D_LE, 1, 3, 0x6665), # not used # 64
(sock_diag.INET_DIAG_BC_NOP, 1, 1, None), # 72
# 76 acc
# 80 rej
]
# pylint: enable=bad-whitespace
bytecode = self.PackAndCheckBytecode(instructions)
expected = (
"0208500000000000"
"050848000000ffff"
"071c20000a800000ffffffff00000000000000000000000000000001"
"01041c00"
"0718200002200000ffffffff7f000001"
"0508100000006566"
"00040400"
)
states = 1 << tcp_test.TCP_ESTABLISHED
self.assertMultiLineEqual(expected, bytecode.encode("hex"))
self.assertEquals(76, len(bytecode))
self.socketpairs = self._CreateLotsOfSockets(SOCK_STREAM)
filteredsockets = self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, bytecode,
states=states)
allsockets = self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, NO_BYTECODE,
states=states)
self.assertItemsEqual(allsockets, filteredsockets)
# Pick a few sockets in hash table order, and check that the bytecode we
# compiled selects them properly.
for socketpair in self.socketpairs.values()[:20]:
for s in socketpair:
diag_msg = self.sock_diag.FindSockDiagFromFd(s)
instructions = [
(sock_diag.INET_DIAG_BC_S_GE, 1, 5, diag_msg.id.sport),
(sock_diag.INET_DIAG_BC_S_LE, 1, 4, diag_msg.id.sport),
(sock_diag.INET_DIAG_BC_D_GE, 1, 3, diag_msg.id.dport),
(sock_diag.INET_DIAG_BC_D_LE, 1, 2, diag_msg.id.dport),
]
bytecode = self.PackAndCheckBytecode(instructions)
self.assertEquals(32, len(bytecode))
sockets = self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, bytecode)
self.assertEquals(1, len(sockets))
# TODO: why doesn't comparing the cstructs work?
self.assertEquals(diag_msg.Pack(), sockets[0][0].Pack())
def testCrossFamilyBytecode(self):
"""Checks for a cross-family bug in inet_diag_hostcond matching.
Relevant kernel commits:
android-3.4:
f67caec inet_diag: avoid unsafe and nonsensical prefix matches in inet_diag_bc_run()
"""
# TODO: this is only here because the test fails if there are any open
# sockets other than the ones it creates itself. Make the bytecode more
# specific and remove it.
states = 1 << tcp_test.TCP_ESTABLISHED
self.assertFalse(self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, "",
states=states))
unused_pair4 = net_test.CreateSocketPair(AF_INET, SOCK_STREAM, "127.0.0.1")
unused_pair6 = net_test.CreateSocketPair(AF_INET6, SOCK_STREAM, "::1")
bytecode4 = self.PackAndCheckBytecode([
(sock_diag.INET_DIAG_BC_S_COND, 1, 2, ("0.0.0.0", 0, -1))])
bytecode6 = self.PackAndCheckBytecode([
(sock_diag.INET_DIAG_BC_S_COND, 1, 2, ("::", 0, -1))])
# IPv4/v6 filters must never match IPv6/IPv4 sockets...
v4socks = self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, bytecode4,
states=states)
self.assertTrue(v4socks)
self.assertTrue(all(d.family == AF_INET for d, _ in v4socks))
v6socks = self.sock_diag.DumpAllInetSockets(IPPROTO_TCP, bytecode6,
states=states)
self.assertTrue(v6socks)
self.assertTrue(all(d.family == AF_INET6 for d, _ in v6socks))
# Except for mapped addresses, which match both IPv4 and IPv6.
pair5 = net_test.CreateSocketPair(AF_INET6, SOCK_STREAM,
"::ffff:127.0.0.1")
diag_msgs = [self.sock_diag.FindSockDiagFromFd(s) for s in pair5]
v4socks = [d for d, _ in self.sock_diag.DumpAllInetSockets(IPPROTO_TCP,
bytecode4,
states=states)]
v6socks = [d for d, _ in self.sock_diag.DumpAllInetSockets(IPPROTO_TCP,
bytecode6,
states=states)]
self.assertTrue(all(d in v4socks for d in diag_msgs))
self.assertTrue(all(d in v6socks for d in diag_msgs))
def testPortComparisonValidation(self):
"""Checks for a bug in validating port comparison bytecode.
Relevant kernel commits:
android-3.4:
5e1f542 inet_diag: validate port comparison byte code to prevent unsafe reads
"""
bytecode = sock_diag.InetDiagBcOp((sock_diag.INET_DIAG_BC_D_GE, 4, 8))
self.assertEquals("???",
self.sock_diag.DecodeBytecode(bytecode))
self.assertRaisesErrno(
EINVAL,
self.sock_diag.DumpAllInetSockets, IPPROTO_TCP, bytecode.Pack())
def testNonSockDiagCommand(self):
def DiagDump(code):
sock_id = self.sock_diag._EmptyInetDiagSockId()
req = sock_diag.InetDiagReqV2((AF_INET6, IPPROTO_TCP, 0, 0xffffffff,
sock_id))
self.sock_diag._Dump(code, req, sock_diag.InetDiagMsg, "")
op = sock_diag.SOCK_DIAG_BY_FAMILY
DiagDump(op) # No errors? Good.
self.assertRaisesErrno(EINVAL, DiagDump, op + 17)
class SockDestroyTest(SockDiagBaseTest):
"""Tests that SOCK_DESTROY works correctly.
Relevant kernel commits:
net-next:
b613f56 net: diag: split inet_diag_dump_one_icsk into two
64be0ae net: diag: Add the ability to destroy a socket.
6eb5d2e net: diag: Support SOCK_DESTROY for inet sockets.
c1e64e2 net: diag: Support destroying TCP sockets.
2010b93 net: tcp: deal with listen sockets properly in tcp_abort.
android-3.4:
d48ec88 net: diag: split inet_diag_dump_one_icsk into two
2438189 net: diag: Add the ability to destroy a socket.
7a2ddbc net: diag: Support SOCK_DESTROY for inet sockets.
44047b2 net: diag: Support destroying TCP sockets.
200dae7 net: tcp: deal with listen sockets properly in tcp_abort.
android-3.10:
9eaff90 net: diag: split inet_diag_dump_one_icsk into two
d60326c net: diag: Add the ability to destroy a socket.
3d4ce85 net: diag: Support SOCK_DESTROY for inet sockets.
529dfc6 net: diag: Support destroying TCP sockets.
9c712fe net: tcp: deal with listen sockets properly in tcp_abort.
android-3.18:
100263d net: diag: split inet_diag_dump_one_icsk into two
194c5f3 net: diag: Add the ability to destroy a socket.
8387ea2 net: diag: Support SOCK_DESTROY for inet sockets.
b80585a net: diag: Support destroying TCP sockets.
476c6ce net: tcp: deal with listen sockets properly in tcp_abort.
android-4.1:
56eebf8 net: diag: split inet_diag_dump_one_icsk into two
fb486c9 net: diag: Add the ability to destroy a socket.
0c02b7e net: diag: Support SOCK_DESTROY for inet sockets.
67c71d8 net: diag: Support destroying TCP sockets.
a76e0ec net: tcp: deal with listen sockets properly in tcp_abort.
e6e277b net: diag: support v4mapped sockets in inet_diag_find_one_icsk()
android-4.4:
76c83a9 net: diag: split inet_diag_dump_one_icsk into two
f7cf791 net: diag: Add the ability to destroy a socket.
1c42248 net: diag: Support SOCK_DESTROY for inet sockets.
c9e8440d net: diag: Support destroying TCP sockets.
3d9502c tcp: diag: add support for request sockets to tcp_abort()
001cf75 net: tcp: deal with listen sockets properly in tcp_abort.
"""
def testClosesSockets(self):
self.socketpairs = self._CreateLotsOfSockets(SOCK_STREAM)
for _, socketpair in self.socketpairs.iteritems():
# Close one of the sockets.
# This will send a RST that will close the other side as well.
s = random.choice(socketpair)
if random.randrange(0, 2) == 1:
self.sock_diag.CloseSocketFromFd(s)
else:
diag_msg = self.sock_diag.FindSockDiagFromFd(s)
# Get the cookie wrong and ensure that we get an error and the socket
# is not closed.
real_cookie = diag_msg.id.cookie
diag_msg.id.cookie = os.urandom(len(real_cookie))
req = self.sock_diag.DiagReqFromDiagMsg(diag_msg, IPPROTO_TCP)
self.assertRaisesErrno(ENOENT, self.sock_diag.CloseSocket, req)
self.assertSocketConnected(s)
# Now close it with the correct cookie.
req.id.cookie = real_cookie
self.sock_diag.CloseSocket(req)
# Check that both sockets in the pair are closed.
self.assertSocketsClosed(socketpair)
# TODO:
# Test that killing unix sockets returns EOPNOTSUPP.
class SocketExceptionThread(threading.Thread):
def __init__(self, sock, operation):
self.exception = None
super(SocketExceptionThread, self).__init__()
self.daemon = True
self.sock = sock
self.operation = operation
def run(self):
try:
self.operation(self.sock)
except IOError, e:
self.exception = e
class SockDiagTcpTest(tcp_test.TcpBaseTest, SockDiagBaseTest):
def testIpv4MappedSynRecvSocket(self):
"""Tests for the absence of a bug with AF_INET6 TCP SYN-RECV sockets.
Relevant kernel commits:
android-3.4:
457a04b inet_diag: fix oops for IPv4 AF_INET6 TCP SYN-RECV state
"""
netid = random.choice(self.tuns.keys())
self.IncomingConnection(5, tcp_test.TCP_SYN_RECV, netid)
sock_id = self.sock_diag._EmptyInetDiagSockId()
sock_id.sport = self.port
states = 1 << tcp_test.TCP_SYN_RECV
req = sock_diag.InetDiagReqV2((AF_INET6, IPPROTO_TCP, 0, states, sock_id))
children = self.sock_diag.Dump(req, NO_BYTECODE)
self.assertTrue(children)
for child, unused_args in children:
self.assertEqual(tcp_test.TCP_SYN_RECV, child.state)
self.assertEqual(self.sock_diag.PaddedAddress(self.remoteaddr),
child.id.dst)
self.assertEqual(self.sock_diag.PaddedAddress(self.myaddr),
child.id.src)
class SockDestroyTcpTest(tcp_test.TcpBaseTest, SockDiagBaseTest):
def setUp(self):
super(SockDestroyTcpTest, self).setUp()
self.netid = random.choice(self.tuns.keys())
def CheckRstOnClose(self, sock, req, expect_reset, msg, do_close=True):
"""Closes the socket and checks whether a RST is sent or not."""
if sock is not None:
self.assertIsNone(req, "Must specify sock or req, not both")
self.sock_diag.CloseSocketFromFd(sock)
self.assertRaisesErrno(EINVAL, sock.accept)
else:
self.assertIsNone(sock, "Must specify sock or req, not both")
self.sock_diag.CloseSocket(req)
if expect_reset:
desc, rst = self.RstPacket()
msg = "%s: expecting %s: " % (msg, desc)
self.ExpectPacketOn(self.netid, msg, rst)
else:
msg = "%s: " % msg
self.ExpectNoPacketsOn(self.netid, msg)
if sock is not None and do_close:
sock.close()
def CheckTcpReset(self, state, statename):
for version in [4, 5, 6]:
msg = "Closing incoming IPv%d %s socket" % (version, statename)
self.IncomingConnection(version, state, self.netid)
self.CheckRstOnClose(self.s, None, False, msg)
if state != tcp_test.TCP_LISTEN:
msg = "Closing accepted IPv%d %s socket" % (version, statename)
self.CheckRstOnClose(self.accepted, None, True, msg)
def testTcpResets(self):
"""Checks that closing sockets in appropriate states sends a RST."""
self.CheckTcpReset(tcp_test.TCP_LISTEN, "TCP_LISTEN")
self.CheckTcpReset(tcp_test.TCP_ESTABLISHED, "TCP_ESTABLISHED")
self.CheckTcpReset(tcp_test.TCP_CLOSE_WAIT, "TCP_CLOSE_WAIT")
def testFinWait1Socket(self):
for version in [4, 5, 6]:
self.IncomingConnection(version, tcp_test.TCP_ESTABLISHED, self.netid)
# Get the cookie so we can find this socket after we close it.
diag_msg = self.sock_diag.FindSockDiagFromFd(self.accepted)
diag_req = self.sock_diag.DiagReqFromDiagMsg(diag_msg, IPPROTO_TCP)
# Close the socket and check that it goes into FIN_WAIT1 and sends a FIN.
net_test.EnableFinWait(self.accepted)
self.accepted.close()
diag_req.states = 1 << tcp_test.TCP_FIN_WAIT1
diag_msg, attrs = self.sock_diag.GetSockInfo(diag_req)
self.assertEquals(tcp_test.TCP_FIN_WAIT1, diag_msg.state)
desc, fin = self.FinPacket()
self.ExpectPacketOn(self.netid, "Closing FIN_WAIT1 socket", fin)
# Destroy the socket and expect no RST.
self.CheckRstOnClose(None, diag_req, False, "Closing FIN_WAIT1 socket")
diag_msg, attrs = self.sock_diag.GetSockInfo(diag_req)
# The socket is still there in FIN_WAIT1: SOCK_DESTROY did nothing
# because userspace had already closed it.
self.assertEquals(tcp_test.TCP_FIN_WAIT1, diag_msg.state)
# ACK the FIN so we don't trip over retransmits in future tests.
finversion = 4 if version == 5 else version
desc, finack = packets.ACK(finversion, self.remoteaddr, self.myaddr, fin)
diag_msg, attrs = self.sock_diag.GetSockInfo(diag_req)
self.ReceivePacketOn(self.netid, finack)
# See if we can find the resulting FIN_WAIT2 socket. This does not appear
# to work on 3.10.
if net_test.LINUX_VERSION >= (3, 18):
diag_req.states = 1 << tcp_test.TCP_FIN_WAIT2
infos = self.sock_diag.Dump(diag_req, "")
self.assertTrue(any(diag_msg.state == tcp_test.TCP_FIN_WAIT2
for diag_msg, attrs in infos),
"Expected to find FIN_WAIT2 socket in %s" % infos)
def FindChildSockets(self, s):
"""Finds the SYN_RECV child sockets of a given listening socket."""
d = self.sock_diag.FindSockDiagFromFd(self.s)
req = self.sock_diag.DiagReqFromDiagMsg(d, IPPROTO_TCP)
req.states = 1 << tcp_test.TCP_SYN_RECV | 1 << tcp_test.TCP_ESTABLISHED
req.id.cookie = "\x00" * 8
bad_bytecode = self.PackAndCheckBytecode(
[(sock_diag.INET_DIAG_BC_MARK_COND, 1, 2, (0xffff, 0xffff))])
self.assertEqual([], self.sock_diag.Dump(req, bad_bytecode))
bytecode = self.PackAndCheckBytecode(
[(sock_diag.INET_DIAG_BC_MARK_COND, 1, 2, (self.netid, 0xffff))])
children = self.sock_diag.Dump(req, bytecode)
return [self.sock_diag.DiagReqFromDiagMsg(d, IPPROTO_TCP)
for d, _ in children]
def CheckChildSocket(self, version, statename, parent_first):
state = getattr(tcp_test, statename)
self.IncomingConnection(version, state, self.netid)
d = self.sock_diag.FindSockDiagFromFd(self.s)
parent = self.sock_diag.DiagReqFromDiagMsg(d, IPPROTO_TCP)
children = self.FindChildSockets(self.s)
self.assertEquals(1, len(children))
is_established = (state == tcp_test.TCP_NOT_YET_ACCEPTED)
expected_state = tcp_test.TCP_ESTABLISHED if is_established else state
# The new TCP listener code in 4.4 makes SYN_RECV sockets live in the
# regular TCP hash tables, and inet_diag_find_one_icsk can find them.
# Before 4.4, we can see those sockets in dumps, but we can't fetch
# or close them.
can_close_children = is_established or net_test.LINUX_VERSION >= (4, 4)
for child in children:
if can_close_children:
diag_msg, attrs = self.sock_diag.GetSockInfo(child)
self.assertEquals(diag_msg.state, expected_state)
self.assertMarkIs(self.netid, attrs)
else:
self.assertRaisesErrno(ENOENT, self.sock_diag.GetSockInfo, child)
def CloseParent(expect_reset):
msg = "Closing parent IPv%d %s socket %s child" % (
version, statename, "before" if parent_first else "after")
self.CheckRstOnClose(self.s, None, expect_reset, msg)
self.assertRaisesErrno(ENOENT, self.sock_diag.GetSockInfo, parent)
def CheckChildrenClosed():
for child in children:
self.assertRaisesErrno(ENOENT, self.sock_diag.GetSockInfo, child)
def CloseChildren():
for child in children:
msg = "Closing child IPv%d %s socket %s parent" % (
version, statename, "after" if parent_first else "before")
self.sock_diag.GetSockInfo(child)
self.CheckRstOnClose(None, child, is_established, msg)
self.assertRaisesErrno(ENOENT, self.sock_diag.GetSockInfo, child)
CheckChildrenClosed()
if parent_first:
# Closing the parent will close child sockets, which will send a RST,
# iff they are already established.
CloseParent(is_established)
if is_established:
CheckChildrenClosed()
elif can_close_children:
CloseChildren()
CheckChildrenClosed()
self.s.close()
else:
if can_close_children:
CloseChildren()
CloseParent(False)
self.s.close()
def testChildSockets(self):
for version in [4, 5, 6]:
self.CheckChildSocket(version, "TCP_SYN_RECV", False)
self.CheckChildSocket(version, "TCP_SYN_RECV", True)
self.CheckChildSocket(version, "TCP_NOT_YET_ACCEPTED", False)
self.CheckChildSocket(version, "TCP_NOT_YET_ACCEPTED", True)
def testAcceptInterrupted(self):
"""Tests that accept() is interrupted by SOCK_DESTROY."""
for version in [4, 5, 6]:
self.IncomingConnection(version, tcp_test.TCP_LISTEN, self.netid)
self.CloseDuringBlockingCall(self.s, lambda sock: sock.accept(), EINVAL)
self.assertRaisesErrno(ECONNABORTED, self.s.send, "foo")
self.assertRaisesErrno(EINVAL, self.s.accept)
def testReadInterrupted(self):
"""Tests that read() is interrupted by SOCK_DESTROY."""
for version in [4, 5, 6]:
self.IncomingConnection(version, tcp_test.TCP_ESTABLISHED, self.netid)
self.CloseDuringBlockingCall(self.accepted, lambda sock: sock.recv(4096),
ECONNABORTED)
self.assertRaisesErrno(EPIPE, self.accepted.send, "foo")
def testConnectInterrupted(self):
"""Tests that connect() is interrupted by SOCK_DESTROY."""
for version in [4, 5, 6]:
family = {4: AF_INET, 5: AF_INET6, 6: AF_INET6}[version]
s = net_test.Socket(family, SOCK_STREAM, IPPROTO_TCP)
self.SelectInterface(s, self.netid, "mark")
if version == 5:
remoteaddr = "::ffff:" + self.GetRemoteAddress(4)
version = 4
else:
remoteaddr = self.GetRemoteAddress(version)
s.bind(("", 0))
_, sport = s.getsockname()[:2]
self.CloseDuringBlockingCall(
s, lambda sock: sock.connect((remoteaddr, 53)), ECONNABORTED)
desc, syn = packets.SYN(53, version, self.MyAddress(version, self.netid),
remoteaddr, sport=sport, seq=None)
self.ExpectPacketOn(self.netid, desc, syn)
msg = "SOCK_DESTROY of socket in connect, expected no RST"
self.ExpectNoPacketsOn(self.netid, msg)
class SockDestroyUdpTest(SockDiagBaseTest):
"""Tests SOCK_DESTROY on UDP sockets.
Relevant kernel commits:
upstream net-next:
5d77dca net: diag: support SOCK_DESTROY for UDP sockets
f95bf34 net: diag: make udp_diag_destroy work for mapped addresses.
"""
def testClosesUdpSockets(self):
self.socketpairs = self._CreateLotsOfSockets(SOCK_DGRAM)
for _, socketpair in self.socketpairs.iteritems():
s1, s2 = socketpair
self.assertSocketConnected(s1)
self.sock_diag.CloseSocketFromFd(s1)
self.assertSocketClosed(s1)
self.assertSocketConnected(s2)
self.sock_diag.CloseSocketFromFd(s2)
self.assertSocketClosed(s2)
def BindToRandomPort(self, s, addr):
ATTEMPTS = 20
for i in xrange(20):
port = random.randrange(1024, 65535)
try:
s.bind((addr, port))
return port
except error, e:
if e.errno != EADDRINUSE:
raise e
raise ValueError("Could not find a free port on %s after %d attempts" %
(addr, ATTEMPTS))
def testSocketAddressesAfterClose(self):
for version in 4, 5, 6:
netid = random.choice(self.NETIDS)
dst = self.GetRemoteAddress(version)
family = {4: AF_INET, 5: AF_INET6, 6: AF_INET6}[version]
unspec = {4: "0.0.0.0", 5: "::", 6: "::"}[version]
# Closing a socket that was not explicitly bound (i.e., bound via
# connect(), not bind()) clears the source address and port.
s = self.BuildSocket(version, net_test.UDPSocket, netid, "mark")
self.SelectInterface(s, netid, "mark")
s.connect((dst, 53))
self.sock_diag.CloseSocketFromFd(s)
self.assertEqual((unspec, 0), s.getsockname()[:2])
# Closing a socket bound to an IP address leaves the address as is.
s = self.BuildSocket(version, net_test.UDPSocket, netid, "mark")
src = self.MyAddress(version, netid)
s.bind((src, 0))
s.connect((dst, 53))
port = s.getsockname()[1]
self.sock_diag.CloseSocketFromFd(s)
self.assertEqual((src, 0), s.getsockname()[:2])
# Closing a socket bound to a port leaves the port as is.
s = self.BuildSocket(version, net_test.UDPSocket, netid, "mark")
port = self.BindToRandomPort(s, "")
s.connect((dst, 53))
self.sock_diag.CloseSocketFromFd(s)
self.assertEqual((unspec, port), s.getsockname()[:2])
# Closing a socket bound to IP address and port leaves both as is.
s = self.BuildSocket(version, net_test.UDPSocket, netid, "mark")
src = self.MyAddress(version, netid)
port = self.BindToRandomPort(s, src)
self.sock_diag.CloseSocketFromFd(s)
self.assertEqual((src, port), s.getsockname()[:2])
def testReadInterrupted(self):
"""Tests that read() is interrupted by SOCK_DESTROY."""
for version in [4, 5, 6]:
family = {4: AF_INET, 5: AF_INET6, 6: AF_INET6}[version]
s = net_test.UDPSocket(family)
self.SelectInterface(s, random.choice(self.NETIDS), "mark")
addr = self.GetRemoteAddress(version)
# Check that reads on connected sockets are interrupted.
s.connect((addr, 53))
self.assertEquals(3, s.send("foo"))
self.CloseDuringBlockingCall(s, lambda sock: sock.recv(4096),
ECONNABORTED)
# A destroyed socket is no longer connected, but still usable.
self.assertRaisesErrno(EDESTADDRREQ, s.send, "foo")
self.assertEquals(3, s.sendto("foo", (addr, 53)))
# Check that reads on unconnected sockets are also interrupted.
self.CloseDuringBlockingCall(s, lambda sock: sock.recv(4096),
ECONNABORTED)
class SockDestroyPermissionTest(SockDiagBaseTest):
def CheckPermissions(self, socktype):
s = socket(AF_INET6, socktype, 0)
self.SelectInterface(s, random.choice(self.NETIDS), "mark")
if socktype == SOCK_STREAM:
s.listen(1)
expectedstate = tcp_test.TCP_LISTEN
else:
s.connect((self.GetRemoteAddress(6), 53))
expectedstate = tcp_test.TCP_ESTABLISHED
with net_test.RunAsUid(12345):
self.assertRaisesErrno(
EPERM, self.sock_diag.CloseSocketFromFd, s)
self.sock_diag.CloseSocketFromFd(s)
self.assertRaises(ValueError, self.sock_diag.CloseSocketFromFd, s)
def testUdp(self):
self.CheckPermissions(SOCK_DGRAM)
def testTcp(self):
self.CheckPermissions(SOCK_STREAM)
class SockDiagMarkTest(tcp_test.TcpBaseTest, SockDiagBaseTest):
"""Tests SOCK_DIAG bytecode filters that use marks.
Relevant kernel commits:
upstream net-next:
627cc4a net: diag: slightly refactor the inet_diag_bc_audit error checks.
a52e95a net: diag: allow socket bytecode filters to match socket marks
d545cac net: inet: diag: expose the socket mark to privileged processes.
"""
IPPROTO_SCTP = 132
def FilterEstablishedSockets(self, mark, mask):
instructions = [(sock_diag.INET_DIAG_BC_MARK_COND, 1, 2, (mark, mask))]
bytecode = self.sock_diag.PackBytecode(instructions)
return self.sock_diag.DumpAllInetSockets(
IPPROTO_TCP, bytecode, states=(1 << tcp_test.TCP_ESTABLISHED))
def assertSamePorts(self, ports, diag_msgs):
expected = sorted(ports)
actual = sorted([msg[0].id.sport for msg in diag_msgs])
self.assertEquals(expected, actual)
def SockInfoMatchesSocket(self, s, info):
try:
self.assertSockInfoMatchesSocket(s, info)
return True
except AssertionError:
return False
@staticmethod
def SocketDescription(s):
return "%s -> %s" % (str(s.getsockname()), str(s.getpeername()))
def assertFoundSockets(self, infos, sockets):
matches = {}
for s in sockets:
match = None
for info in infos:
if self.SockInfoMatchesSocket(s, info):
if match:
self.fail("Socket %s matched both %s and %s" %
(self.SocketDescription(s), match, info))
matches[s] = info
self.assertTrue(s in matches, "Did not find socket %s in dump" %
self.SocketDescription(s))
for i in infos:
if i not in matches.values():
self.fail("Too many sockets in dump, first unexpected: %s" % str(i))
def testMarkBytecode(self):
family, addr = random.choice([
(AF_INET, "127.0.0.1"),
(AF_INET6, "::1"),
(AF_INET6, "::ffff:127.0.0.1")])
s1, s2 = net_test.CreateSocketPair(family, SOCK_STREAM, addr)
s1.setsockopt(SOL_SOCKET, net_test.SO_MARK, 0xfff1234)
s2.setsockopt(SOL_SOCKET, net_test.SO_MARK, 0xf0f1235)
infos = self.FilterEstablishedSockets(0x1234, 0xffff)
self.assertFoundSockets(infos, [s1])
infos = self.FilterEstablishedSockets(0x1234, 0xfffe)
self.assertFoundSockets(infos, [s1, s2])
infos = self.FilterEstablishedSockets(0x1235, 0xffff)
self.assertFoundSockets(infos, [s2])
infos = self.FilterEstablishedSockets(0x0, 0x0)
self.assertFoundSockets(infos, [s1, s2])
infos = self.FilterEstablishedSockets(0xfff0000, 0xf0fed00)
self.assertEquals(0, len(infos))
with net_test.RunAsUid(12345):
self.assertRaisesErrno(EPERM, self.FilterEstablishedSockets,
0xfff0000, 0xf0fed00)
@staticmethod
def SetRandomMark(s):
# Python doesn't like marks that don't fit into a signed int.
mark = random.randrange(0, 2**31 - 1)
s.setsockopt(SOL_SOCKET, net_test.SO_MARK, mark)
return mark
def assertSocketMarkIs(self, s, mark):
diag_msg, attrs = self.sock_diag.FindSockInfoFromFd(s)
self.assertMarkIs(mark, attrs)
with net_test.RunAsUid(12345):
diag_msg, attrs = self.sock_diag.FindSockInfoFromFd(s)
self.assertMarkIs(None, attrs)
def testMarkInAttributes(self):
testcases = [(AF_INET, "127.0.0.1"),
(AF_INET6, "::1"),
(AF_INET6, "::ffff:127.0.0.1")]
for family, addr in testcases:
# TCP listen sockets.
server = socket(family, SOCK_STREAM, 0)
server.bind((addr, 0))
port = server.getsockname()[1]
server.listen(1) # Or the socket won't be in the hashtables.
server_mark = self.SetRandomMark(server)
self.assertSocketMarkIs(server, server_mark)
# TCP client sockets.
client = socket(family, SOCK_STREAM, 0)
client_mark = self.SetRandomMark(client)
client.connect((addr, port))
self.assertSocketMarkIs(client, client_mark)
# TCP server sockets.
accepted, _ = server.accept()
self.assertSocketMarkIs(accepted, server_mark)
accepted_mark = self.SetRandomMark(accepted)
self.assertSocketMarkIs(accepted, accepted_mark)
self.assertSocketMarkIs(server, server_mark)
server.close()
client.close()
# Other TCP states are tested in SockDestroyTcpTest.
# UDP sockets.
s = socket(family, SOCK_DGRAM, 0)
mark = self.SetRandomMark(s)
s.connect(("", 53))
self.assertSocketMarkIs(s, mark)
s.close()
# Basic test for SCTP. sctp_diag was only added in 4.7.
if net_test.LINUX_VERSION >= (4, 7, 0):
s = socket(family, SOCK_STREAM, self.IPPROTO_SCTP)
s.bind((addr, 0))
s.listen(1)
mark = self.SetRandomMark(s)
self.assertSocketMarkIs(s, mark)
sockets = self.sock_diag.DumpAllInetSockets(self.IPPROTO_SCTP,
NO_BYTECODE)
self.assertEqual(1, len(sockets))
self.assertEqual(mark, sockets[0][1].get("INET_DIAG_MARK", None))
s.close()
if __name__ == "__main__":
unittest.main()