diff options
| -rw-r--r-- | changelog.d/8400.bugfix | 1 | ||||
| -rw-r--r-- | synapse/handlers/identity.py | 25 | ||||
| -rw-r--r-- | synapse/http/__init__.py | 17 | ||||
| -rw-r--r-- | synapse/http/client.py | 54 | ||||
| -rw-r--r-- | synapse/http/matrixfederationclient.py | 55 | ||||
| -rw-r--r-- | synapse/http/proxyagent.py | 16 | ||||
| -rw-r--r-- | synapse/util/async_helpers.py | 47 | ||||
| -rw-r--r-- | tests/http/test_fedclient.py | 14 | ||||
| -rw-r--r-- | tests/http/test_simple_client.py | 180 |
9 files changed, 311 insertions, 98 deletions
diff --git a/changelog.d/8400.bugfix b/changelog.d/8400.bugfix new file mode 100644 index 0000000000..835658ba5e --- /dev/null +++ b/changelog.d/8400.bugfix @@ -0,0 +1 @@ +Fix incorrect handling of timeouts on outgoing HTTP requests. diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py index ab15570f7a..bc3e9607ca 100644 --- a/synapse/handlers/identity.py +++ b/synapse/handlers/identity.py @@ -21,8 +21,6 @@ import logging import urllib.parse from typing import Awaitable, Callable, Dict, List, Optional, Tuple -from twisted.internet.error import TimeoutError - from synapse.api.errors import ( CodeMessageException, Codes, @@ -30,6 +28,7 @@ from synapse.api.errors import ( SynapseError, ) from synapse.config.emailconfig import ThreepidBehaviour +from synapse.http import RequestTimedOutError from synapse.http.client import SimpleHttpClient from synapse.types import JsonDict, Requester from synapse.util import json_decoder @@ -93,7 +92,7 @@ class IdentityHandler(BaseHandler): try: data = await self.http_client.get_json(url, query_params) - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except HttpResponseException as e: logger.info( @@ -173,7 +172,7 @@ class IdentityHandler(BaseHandler): if e.code != 404 or not use_v2: logger.error("3PID bind failed with Matrix error: %r", e) raise e.to_synapse_error() - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except CodeMessageException as e: data = json_decoder.decode(e.msg) # XXX WAT? @@ -273,7 +272,7 @@ class IdentityHandler(BaseHandler): else: logger.error("Failed to unbind threepid on identity server: %s", e) raise SynapseError(500, "Failed to contact identity server") - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") await self.store.remove_user_bound_threepid( @@ -419,7 +418,7 @@ class IdentityHandler(BaseHandler): except HttpResponseException as e: logger.info("Proxied requestToken failed: %r", e) raise e.to_synapse_error() - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") async def requestMsisdnToken( @@ -471,7 +470,7 @@ class IdentityHandler(BaseHandler): except HttpResponseException as e: logger.info("Proxied requestToken failed: %r", e) raise e.to_synapse_error() - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") assert self.hs.config.public_baseurl @@ -553,7 +552,7 @@ class IdentityHandler(BaseHandler): id_server + "/_matrix/identity/api/v1/validate/msisdn/submitToken", body, ) - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except HttpResponseException as e: logger.warning("Error contacting msisdn account_threepid_delegate: %s", e) @@ -627,7 +626,7 @@ class IdentityHandler(BaseHandler): # require or validate it. See the following for context: # https://github.com/matrix-org/synapse/issues/5253#issuecomment-666246950 return data["mxid"] - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except IOError as e: logger.warning("Error from v1 identity server lookup: %s" % (e,)) @@ -655,7 +654,7 @@ class IdentityHandler(BaseHandler): "%s%s/_matrix/identity/v2/hash_details" % (id_server_scheme, id_server), {"access_token": id_access_token}, ) - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") if not isinstance(hash_details, dict): @@ -727,7 +726,7 @@ class IdentityHandler(BaseHandler): }, headers=headers, ) - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except Exception as e: logger.warning("Error when performing a v2 3pid lookup: %s", e) @@ -823,7 +822,7 @@ class IdentityHandler(BaseHandler): invite_config, {"Authorization": create_id_access_token_header(id_access_token)}, ) - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except HttpResponseException as e: if e.code != 404: @@ -841,7 +840,7 @@ class IdentityHandler(BaseHandler): data = await self.blacklisting_http_client.post_json_get_json( url, invite_config ) - except TimeoutError: + except RequestTimedOutError: raise SynapseError(500, "Timed out contacting identity server") except HttpResponseException as e: logger.warning( diff --git a/synapse/http/__init__.py b/synapse/http/__init__.py index 8eb3638591..59b01b812c 100644 --- a/synapse/http/__init__.py +++ b/synapse/http/__init__.py @@ -16,8 +16,6 @@ import re from twisted.internet import task -from twisted.internet.defer import CancelledError -from twisted.python import failure from twisted.web.client import FileBodyProducer from synapse.api.errors import SynapseError @@ -26,19 +24,8 @@ from synapse.api.errors import SynapseError class RequestTimedOutError(SynapseError): """Exception representing timeout of an outbound request""" - def __init__(self): - super().__init__(504, "Timed out") - - -def cancelled_to_request_timed_out_error(value, timeout): - """Turns CancelledErrors into RequestTimedOutErrors. - - For use with async.add_timeout_to_deferred - """ - if isinstance(value, failure.Failure): - value.trap(CancelledError) - raise RequestTimedOutError() - return value + def __init__(self, msg): + super().__init__(504, msg) ACCESS_TOKEN_RE = re.compile(r"(\?.*access(_|%5[Ff])token=)[^&]*(.*)$") diff --git a/synapse/http/client.py b/synapse/http/client.py index 4694adc400..8324632cb6 100644 --- a/synapse/http/client.py +++ b/synapse/http/client.py @@ -13,7 +13,6 @@ # 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. - import logging import urllib from io import BytesIO @@ -38,7 +37,7 @@ from zope.interface import implementer, provider from OpenSSL import SSL from OpenSSL.SSL import VERIFY_NONE -from twisted.internet import defer, protocol, ssl +from twisted.internet import defer, error as twisted_error, protocol, ssl from twisted.internet.interfaces import ( IReactorPluggableNameResolver, IResolutionReceiver, @@ -46,17 +45,18 @@ from twisted.internet.interfaces import ( from twisted.internet.task import Cooperator from twisted.python.failure import Failure from twisted.web._newclient import ResponseDone -from twisted.web.client import Agent, HTTPConnectionPool, readBody +from twisted.web.client import ( + Agent, + HTTPConnectionPool, + ResponseNeverReceived, + readBody, +) from twisted.web.http import PotentialDataLoss from twisted.web.http_headers import Headers from twisted.web.iweb import IResponse from synapse.api.errors import Codes, HttpResponseException, SynapseError -from synapse.http import ( - QuieterFileBodyProducer, - cancelled_to_request_timed_out_error, - redact_uri, -) +from synapse.http import QuieterFileBodyProducer, RequestTimedOutError, redact_uri from synapse.http.proxyagent import ProxyAgent from synapse.logging.context import make_deferred_yieldable from synapse.logging.opentracing import set_tag, start_active_span, tags @@ -332,8 +332,6 @@ class SimpleHttpClient: RequestTimedOutError if the request times out before the headers are read """ - # A small wrapper around self.agent.request() so we can easily attach - # counters to it outgoing_requests_counter.labels(method).inc() # log request but strip `access_token` (AS requests for example include this) @@ -362,15 +360,17 @@ class SimpleHttpClient: data=body_producer, headers=headers, **self._extra_treq_args - ) + ) # type: defer.Deferred + # we use our own timeout mechanism rather than treq's as a workaround # for https://twistedmatrix.com/trac/ticket/9534. request_deferred = timeout_deferred( - request_deferred, - 60, - self.hs.get_reactor(), - cancelled_to_request_timed_out_error, + request_deferred, 60, self.hs.get_reactor(), ) + + # turn timeouts into RequestTimedOutErrors + request_deferred.addErrback(_timeout_to_request_timed_out_error) + response = await make_deferred_yieldable(request_deferred) incoming_responses_counter.labels(method, response.code).inc() @@ -410,7 +410,7 @@ class SimpleHttpClient: parsed json Raises: - RequestTimedOutException: if there is a timeout before the response headers + RequestTimedOutError: if there is a timeout before the response headers are received. Note there is currently no timeout on reading the response body. @@ -461,7 +461,7 @@ class SimpleHttpClient: parsed json Raises: - RequestTimedOutException: if there is a timeout before the response headers + RequestTimedOutError: if there is a timeout before the response headers are received. Note there is currently no timeout on reading the response body. @@ -506,7 +506,7 @@ class SimpleHttpClient: Returns: Succeeds when we get a 2xx HTTP response, with the HTTP body as JSON. Raises: - RequestTimedOutException: if there is a timeout before the response headers + RequestTimedOutError: if there is a timeout before the response headers are received. Note there is currently no timeout on reading the response body. @@ -538,7 +538,7 @@ class SimpleHttpClient: Returns: Succeeds when we get a 2xx HTTP response, with the HTTP body as JSON. Raises: - RequestTimedOutException: if there is a timeout before the response headers + RequestTimedOutError: if there is a timeout before the response headers are received. Note there is currently no timeout on reading the response body. @@ -586,7 +586,7 @@ class SimpleHttpClient: Succeeds when we get a 2xx HTTP response, with the HTTP body as bytes. Raises: - RequestTimedOutException: if there is a timeout before the response headers + RequestTimedOutError: if there is a timeout before the response headers are received. Note there is currently no timeout on reading the response body. @@ -631,7 +631,7 @@ class SimpleHttpClient: headers, absolute URI of the response and HTTP response code. Raises: - RequestTimedOutException: if there is a timeout before the response headers + RequestTimedOutError: if there is a timeout before the response headers are received. Note there is currently no timeout on reading the response body. @@ -684,6 +684,18 @@ class SimpleHttpClient: ) +def _timeout_to_request_timed_out_error(f: Failure): + if f.check(twisted_error.TimeoutError, twisted_error.ConnectingCancelledError): + # The TCP connection has its own timeout (set by the 'connectTimeout' param + # on the Agent), which raises twisted_error.TimeoutError exception. + raise RequestTimedOutError("Timeout connecting to remote server") + elif f.check(defer.TimeoutError, ResponseNeverReceived): + # this one means that we hit our overall timeout on the request + raise RequestTimedOutError("Timeout waiting for response from remote server") + + return f + + # XXX: FIXME: This is horribly copy-pasted from matrixfederationclient. # The two should be factored out. diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py index b02c74ab2d..c23a4d7c0c 100644 --- a/synapse/http/matrixfederationclient.py +++ b/synapse/http/matrixfederationclient.py @@ -171,7 +171,7 @@ async def _handle_json_response( d = timeout_deferred(d, timeout=timeout_sec, reactor=reactor) body = await make_deferred_yieldable(d) - except TimeoutError as e: + except defer.TimeoutError as e: logger.warning( "{%s} [%s] Timed out reading response - %s %s", request.txn_id, @@ -655,10 +655,14 @@ class MatrixFederationHttpClient: long_retries (bool): whether to use the long retry algorithm. See docs on _send_request for details. - timeout (int|None): number of milliseconds to wait for the response headers - (including connecting to the server), *for each attempt*. + timeout (int|None): number of milliseconds to wait for the response. self._default_timeout (60s) by default. + Note that we may make several attempts to send the request; this + timeout applies to the time spent waiting for response headers for + *each* attempt (including connection time) as well as the time spent + reading the response body after a 200 response. + ignore_backoff (bool): true to ignore the historical backoff data and try the request anyway. backoff_on_404 (bool): True if we should count a 404 response as @@ -704,8 +708,13 @@ class MatrixFederationHttpClient: timeout=timeout, ) + if timeout is not None: + _sec_timeout = timeout / 1000 + else: + _sec_timeout = self.default_timeout + body = await _handle_json_response( - self.reactor, self.default_timeout, request, response, start_ms + self.reactor, _sec_timeout, request, response, start_ms ) return body @@ -734,10 +743,14 @@ class MatrixFederationHttpClient: long_retries (bool): whether to use the long retry algorithm. See docs on _send_request for details. - timeout (int|None): number of milliseconds to wait for the response headers - (including connecting to the server), *for each attempt*. + timeout (int|None): number of milliseconds to wait for the response. self._default_timeout (60s) by default. + Note that we may make several attempts to send the request; this + timeout applies to the time spent waiting for response headers for + *each* attempt (including connection time) as well as the time spent + reading the response body after a 200 response. + ignore_backoff (bool): true to ignore the historical backoff data and try the request anyway. @@ -801,10 +814,14 @@ class MatrixFederationHttpClient: args (dict|None): A dictionary used to create query strings, defaults to None. - timeout (int|None): number of milliseconds to wait for the response headers - (including connecting to the server), *for each attempt*. + timeout (int|None): number of milliseconds to wait for the response. self._default_timeout (60s) by default. + Note that we may make several attempts to send the request; this + timeout applies to the time spent waiting for response headers for + *each* attempt (including connection time) as well as the time spent + reading the response body after a 200 response. + ignore_backoff (bool): true to ignore the historical backoff data and try the request anyway. @@ -840,8 +857,13 @@ class MatrixFederationHttpClient: timeout=timeout, ) + if timeout is not None: + _sec_timeout = timeout / 1000 + else: + _sec_timeout = self.default_timeout + body = await _handle_json_response( - self.reactor, self.default_timeout, request, response, start_ms + self.reactor, _sec_timeout, request, response, start_ms ) return body @@ -865,10 +887,14 @@ class MatrixFederationHttpClient: long_retries (bool): whether to use the long retry algorithm. See docs on _send_request for details. - timeout (int|None): number of milliseconds to wait for the response headers - (including connecting to the server), *for each attempt*. + timeout (int|None): number of milliseconds to wait for the response. self._default_timeout (60s) by default. + Note that we may make several attempts to send the request; this + timeout applies to the time spent waiting for response headers for + *each* attempt (including connection time) as well as the time spent + reading the response body after a 200 response. + ignore_backoff (bool): true to ignore the historical backoff data and try the request anyway. @@ -900,8 +926,13 @@ class MatrixFederationHttpClient: ignore_backoff=ignore_backoff, ) + if timeout is not None: + _sec_timeout = timeout / 1000 + else: + _sec_timeout = self.default_timeout + body = await _handle_json_response( - self.reactor, self.default_timeout, request, response, start_ms + self.reactor, _sec_timeout, request, response, start_ms ) return body diff --git a/synapse/http/proxyagent.py b/synapse/http/proxyagent.py index 332da02a8d..e32d3f43e0 100644 --- a/synapse/http/proxyagent.py +++ b/synapse/http/proxyagent.py @@ -44,8 +44,11 @@ class ProxyAgent(_AgentBase): `BrowserLikePolicyForHTTPS`, so unless you have special requirements you can leave this as-is. - connectTimeout (float): The amount of time that this Agent will wait - for the peer to accept a connection. + connectTimeout (Optional[float]): The amount of time that this Agent will wait + for the peer to accept a connection, in seconds. If 'None', + HostnameEndpoint's default (30s) will be used. + + This is used for connections to both proxies and destination servers. bindAddress (bytes): The local address for client sockets to bind to. @@ -108,6 +111,15 @@ class ProxyAgent(_AgentBase): Returns: Deferred[IResponse]: completes when the header of the response has been received (regardless of the response status code). + + Can fail with: + SchemeNotSupported: if the uri is not http or https + + twisted.internet.error.TimeoutError if the server we are connecting + to (proxy or destination) does not accept a connection before + connectTimeout. + + ... other things too. """ uri = uri.strip() if not _VALID_URI.match(uri): diff --git a/synapse/util/async_helpers.py b/synapse/util/async_helpers.py index 67ce9a5f39..382f0cf3f0 100644 --- a/synapse/util/async_helpers.py +++ b/synapse/util/async_helpers.py @@ -449,18 +449,8 @@ class ReadWriteLock: R = TypeVar("R") -def _cancelled_to_timed_out_error(value: R, timeout: float) -> R: - if isinstance(value, failure.Failure): - value.trap(CancelledError) - raise defer.TimeoutError(timeout, "Deferred") - return value - - def timeout_deferred( - deferred: defer.Deferred, - timeout: float, - reactor: IReactorTime, - on_timeout_cancel: Optional[Callable[[Any, float], Any]] = None, + deferred: defer.Deferred, timeout: float, reactor: IReactorTime, ) -> defer.Deferred: """The in built twisted `Deferred.addTimeout` fails to time out deferreds that have a canceller that throws exceptions. This method creates a new @@ -469,27 +459,21 @@ def timeout_deferred( (See https://twistedmatrix.com/trac/ticket/9534) - NOTE: Unlike `Deferred.addTimeout`, this function returns a new deferred + NOTE: Unlike `Deferred.addTimeout`, this function returns a new deferred. + + NOTE: the TimeoutError raised by the resultant deferred is + twisted.internet.defer.TimeoutError, which is *different* to the built-in + TimeoutError, as well as various other TimeoutErrors you might have imported. Args: deferred: The Deferred to potentially timeout. timeout: Timeout in seconds reactor: The twisted reactor to use - on_timeout_cancel: A callable which is called immediately - after the deferred times out, and not if this deferred is - otherwise cancelled before the timeout. - It takes an arbitrary value, which is the value of the deferred at - that exact point in time (probably a CancelledError Failure), and - the timeout. - - The default callable (if none is provided) will translate a - CancelledError Failure into a defer.TimeoutError. Returns: - A new Deferred. + A new Deferred, which will errback with defer.TimeoutError on timeout. """ - new_d = defer.Deferred() timed_out = [False] @@ -502,18 +486,23 @@ def timeout_deferred( except: # noqa: E722, if we throw any exception it'll break time outs logger.exception("Canceller failed during timeout") + # the cancel() call should have set off a chain of errbacks which + # will have errbacked new_d, but in case it hasn't, errback it now. + if not new_d.called: - new_d.errback(defer.TimeoutError(timeout, "Deferred")) + new_d.errback(defer.TimeoutError("Timed out after %gs" % (timeout,))) delayed_call = reactor.callLater(timeout, time_it_out) - def convert_cancelled(value): - if timed_out[0]: - to_call = on_timeout_cancel or _cancelled_to_timed_out_error - return to_call(value, timeout) + def convert_cancelled(value: failure.Failure): + # if the orgininal deferred was cancelled, and our timeout has fired, then + # the reason it was cancelled was due to our timeout. Turn the CancelledError + # into a TimeoutError. + if timed_out[0] and value.check(CancelledError): + raise defer.TimeoutError("Timed out after %gs" % (timeout,)) return value - deferred.addBoth(convert_cancelled) + deferred.addErrback(convert_cancelled) def cancel_timeout(result): # stop the pending call to cancel the deferred if it's been fired diff --git a/tests/http/test_fedclient.py b/tests/http/test_fedclient.py index 5604af3795..212484a7fe 100644 --- a/tests/http/test_fedclient.py +++ b/tests/http/test_fedclient.py @@ -318,14 +318,14 @@ class FederationClientTests(HomeserverTestCase): r = self.successResultOf(d) self.assertEqual(r.code, 200) - def test_client_headers_no_body(self): + @parameterized.expand(["get_json", "post_json", "delete_json", "put_json"]) + def test_timeout_reading_body(self, method_name: str): """ If the HTTP request is connected, but gets no response before being - timed out, it'll give a ResponseNeverReceived. + timed out, it'll give a RequestSendFailed with can_retry. """ - d = defer.ensureDeferred( - self.cl.post_json("testserv:8008", "foo/bar", timeout=10000) - ) + method = getattr(self.cl, method_name) + d = defer.ensureDeferred(method("testserv:8008", "foo/bar", timeout=10000)) self.pump() @@ -349,7 +349,9 @@ class FederationClientTests(HomeserverTestCase): self.reactor.advance(10.5) f = self.failureResultOf(d) - self.assertIsInstance(f.value, TimeoutError) + self.assertIsInstance(f.value, RequestSendFailed) + self.assertTrue(f.value.can_retry) + self.assertIsInstance(f.value.inner_exception, defer.TimeoutError) def test_client_requires_trailing_slashes(self): """ diff --git a/tests/http/test_simple_client.py b/tests/http/test_simple_client.py new file mode 100644 index 0000000000..a1cf0862d4 --- /dev/null +++ b/tests/http/test_simple_client.py @@ -0,0 +1,180 @@ +# -*- coding: utf-8 -*- +# Copyright 2020 The Matrix.org Foundation C.I.C. +# +# 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 mock import Mock + +from netaddr import IPSet + +from twisted.internet import defer +from twisted.internet.error import DNSLookupError + +from synapse.http import RequestTimedOutError +from synapse.http.client import SimpleHttpClient +from synapse.server import HomeServer + +from tests.unittest import HomeserverTestCase + + +class SimpleHttpClientTests(HomeserverTestCase): + def prepare(self, reactor, clock, hs: "HomeServer"): + # Add a DNS entry for a test server + self.reactor.lookups["testserv"] = "1.2.3.4" + + self.cl = hs.get_simple_http_client() + + def test_dns_error(self): + """ + If the DNS lookup returns an error, it will bubble up. + """ + d = defer.ensureDeferred(self.cl.get_json("http://testserv2:8008/foo/bar")) + self.pump() + + f = self.failureResultOf(d) + self.assertIsInstance(f.value, DNSLookupError) + + def test_client_connection_refused(self): + d = defer.ensureDeferred(self.cl.get_json("http://testserv:8008/foo/bar")) + + self.pump() + + # Nothing happened yet + self.assertNoResult(d) + + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 1) + (host, port, factory, _timeout, _bindAddress) = clients[0] + self.assertEqual(host, "1.2.3.4") + self.assertEqual(port, 8008) + e = Exception("go away") + factory.clientConnectionFailed(None, e) + self.pump(0.5) + + f = self.failureResultOf(d) + + self.assertIs(f.value, e) + + def test_client_never_connect(self): + """ + If the HTTP request is not connected and is timed out, it'll give a + ConnectingCancelledError or TimeoutError. + """ + d = defer.ensureDeferred(self.cl.get_json("http://testserv:8008/foo/bar")) + + self.pump() + + # Nothing happened yet + self.assertNoResult(d) + + # Make sure treq is trying to connect + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 1) + self.assertEqual(clients[0][0], "1.2.3.4") + self.assertEqual(clients[0][1], 8008) + + # Deferred is still without a result + self.assertNoResult(d) + + # Push by enough to time it out + self.reactor.advance(120) + f = self.failureResultOf(d) + + self.assertIsInstance(f.value, RequestTimedOutError) + + def test_client_connect_no_response(self): + """ + If the HTTP request is connected, but gets no response before being + timed out, it'll give a ResponseNeverReceived. + """ + d = defer.ensureDeferred(self.cl.get_json("http://testserv:8008/foo/bar")) + + self.pump() + + # Nothing happened yet + self.assertNoResult(d) + + # Make sure treq is trying to connect + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 1) + self.assertEqual(clients[0][0], "1.2.3.4") + self.assertEqual(clients[0][1], 8008) + + conn = Mock() + client = clients[0][2].buildProtocol(None) + client.makeConnection(conn) + + # Deferred is still without a result + self.assertNoResult(d) + + # Push by enough to time it out + self.reactor.advance(120) + f = self.failureResultOf(d) + + self.assertIsInstance(f.value, RequestTimedOutError) + + def test_client_ip_range_blacklist(self): + """Ensure that Synapse does not try to connect to blacklisted IPs""" + + # Add some DNS entries we'll blacklist + self.reactor.lookups["internal"] = "127.0.0.1" + self.reactor.lookups["internalv6"] = "fe80:0:0:0:0:8a2e:370:7337" + ip_blacklist = IPSet(["127.0.0.0/8", "fe80::/64"]) + + cl = SimpleHttpClient(self.hs, ip_blacklist=ip_blacklist) + + # Try making a GET request to a blacklisted IPv4 address + # ------------------------------------------------------ + # Make the request + d = defer.ensureDeferred(cl.get_json("http://internal:8008/foo/bar")) + self.pump(1) + + # Check that it was unable to resolve the address + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 0) + + self.failureResultOf(d, DNSLookupError) + + # Try making a POST request to a blacklisted IPv6 address + # ------------------------------------------------------- + # Make the request + d = defer.ensureDeferred( + cl.post_json_get_json("http://internalv6:8008/foo/bar", {}) + ) + + # Move the reactor forwards + self.pump(1) + + # Check that it was unable to resolve the address + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 0) + + # Check that it was due to a blacklisted DNS lookup + self.failureResultOf(d, DNSLookupError) + + # Try making a GET request to a non-blacklisted IPv4 address + # ---------------------------------------------------------- + # Make the request + d = defer.ensureDeferred(cl.get_json("http://testserv:8008/foo/bar")) + + # Nothing has happened yet + self.assertNoResult(d) + + # Move the reactor forwards + self.pump(1) + + # Check that it was able to resolve the address + clients = self.reactor.tcpClients + self.assertNotEqual(len(clients), 0) + + # Connection will still fail as this IP address does not resolve to anything + self.failureResultOf(d, RequestTimedOutError) |