summary refs log tree commit diff
path: root/synapse/config/server.py
blob: 0e46b849cf067a6e77fdd5886df6b0796c6e3b13 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
# Copyright 2014-2021 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.

import argparse
import itertools
import logging
import os.path
import urllib.parse
from textwrap import indent
from typing import Any, Dict, Iterable, List, Optional, Set, Tuple, Union

import attr
import yaml
from netaddr import AddrFormatError, IPNetwork, IPSet

from twisted.conch.ssh.keys import Key

from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.types import JsonDict
from synapse.util.module_loader import load_module
from synapse.util.stringutils import parse_and_validate_server_name

from ._base import Config, ConfigError
from ._util import validate_config

logger = logging.Logger(__name__)

DIRECT_TCP_ERROR = """
Using direct TCP replication for workers is no longer supported.

Please see https://matrix-org.github.io/synapse/latest/upgrade.html#direct-tcp-replication-is-no-longer-supported-migrate-to-redis
"""

# by default, we attempt to listen on both '::' *and* '0.0.0.0' because some OSes
# (Windows, macOS, other BSD/Linux where net.ipv6.bindv6only is set) will only listen
# on IPv6 when '::' is set.
#
# We later check for errors when binding to 0.0.0.0 and ignore them if :: is also in
# in the list.
DEFAULT_BIND_ADDRESSES = ["::", "0.0.0.0"]


def _6to4(network: IPNetwork) -> IPNetwork:
    """Convert an IPv4 network into a 6to4 IPv6 network per RFC 3056."""

    # 6to4 networks consist of:
    # * 2002 as the first 16 bits
    # * The first IPv4 address in the network hex-encoded as the next 32 bits
    # * The new prefix length needs to include the bits from the 2002 prefix.
    hex_network = hex(network.first)[2:]
    hex_network = ("0" * (8 - len(hex_network))) + hex_network
    return IPNetwork(
        "2002:%s:%s::/%d"
        % (
            hex_network[:4],
            hex_network[4:],
            16 + network.prefixlen,
        )
    )


def generate_ip_set(
    ip_addresses: Optional[Iterable[str]],
    extra_addresses: Optional[Iterable[str]] = None,
    config_path: Optional[Iterable[str]] = None,
) -> IPSet:
    """
    Generate an IPSet from a list of IP addresses or CIDRs.

    Additionally, for each IPv4 network in the list of IP addresses, also
    includes the corresponding IPv6 networks.

    This includes:

    * IPv4-Compatible IPv6 Address (see RFC 4291, section 2.5.5.1)
    * IPv4-Mapped IPv6 Address (see RFC 4291, section 2.5.5.2)
    * 6to4 Address (see RFC 3056, section 2)

    Args:
        ip_addresses: An iterable of IP addresses or CIDRs.
        extra_addresses: An iterable of IP addresses or CIDRs.
        config_path: The path in the configuration for error messages.

    Returns:
        A new IP set.
    """
    result = IPSet()
    for ip in itertools.chain(ip_addresses or (), extra_addresses or ()):
        try:
            network = IPNetwork(ip)
        except AddrFormatError as e:
            raise ConfigError(
                "Invalid IP range provided: %s." % (ip,), config_path
            ) from e
        result.add(network)

        # It is possible that these already exist in the set, but that's OK.
        if ":" not in str(network):
            result.add(IPNetwork(network).ipv6(ipv4_compatible=True))
            result.add(IPNetwork(network).ipv6(ipv4_compatible=False))
            result.add(_6to4(network))

    return result


# IP ranges that are considered private / unroutable / don't make sense.
DEFAULT_IP_RANGE_BLACKLIST = [
    # Localhost
    "127.0.0.0/8",
    # Private networks.
    "10.0.0.0/8",
    "172.16.0.0/12",
    "192.168.0.0/16",
    # Carrier grade NAT.
    "100.64.0.0/10",
    # Address registry.
    "192.0.0.0/24",
    # Link-local networks.
    "169.254.0.0/16",
    # Formerly used for 6to4 relay.
    "192.88.99.0/24",
    # Testing networks.
    "198.18.0.0/15",
    "192.0.2.0/24",
    "198.51.100.0/24",
    "203.0.113.0/24",
    # Multicast.
    "224.0.0.0/4",
    # Localhost
    "::1/128",
    # Link-local addresses.
    "fe80::/10",
    # Unique local addresses.
    "fc00::/7",
    # Testing networks.
    "2001:db8::/32",
    # Multicast.
    "ff00::/8",
    # Site-local addresses
    "fec0::/10",
]

DEFAULT_ROOM_VERSION = "10"

ROOM_COMPLEXITY_TOO_GREAT = (
    "Your homeserver is unable to join rooms this large or complex. "
    "Please speak to your server administrator, or upgrade your instance "
    "to join this room."
)

METRICS_PORT_WARNING = """\
The metrics_port configuration option is deprecated in Synapse 0.31 in favour of
a listener. Please see
https://matrix-org.github.io/synapse/latest/metrics-howto.html
on how to configure the new listener.
--------------------------------------------------------------------------------"""


KNOWN_LISTENER_TYPES = {
    "http",
    "metrics",
    "manhole",
}

KNOWN_RESOURCES = {
    "client",
    "consent",
    "federation",
    "health",
    "keys",
    "media",
    "metrics",
    "openid",
    "replication",
    "static",
}


@attr.s(frozen=True)
class HttpResourceConfig:
    names: List[str] = attr.ib(
        factory=list,
        validator=attr.validators.deep_iterable(attr.validators.in_(KNOWN_RESOURCES)),
    )
    compress: bool = attr.ib(
        default=False,
        validator=attr.validators.optional(attr.validators.instance_of(bool)),  # type: ignore[arg-type]
    )


@attr.s(slots=True, frozen=True, auto_attribs=True)
class HttpListenerConfig:
    """Object describing the http-specific parts of the config of a listener"""

    x_forwarded: bool = False
    resources: List[HttpResourceConfig] = attr.Factory(list)
    additional_resources: Dict[str, dict] = attr.Factory(dict)
    tag: Optional[str] = None
    request_id_header: Optional[str] = None
    # If true, the listener will return CORS response headers compatible with MSC3886:
    # https://github.com/matrix-org/matrix-spec-proposals/pull/3886
    experimental_cors_msc3886: bool = False


@attr.s(slots=True, frozen=True, auto_attribs=True)
class ListenerConfig:
    """Object describing the configuration of a single listener."""

    port: int = attr.ib(validator=attr.validators.instance_of(int))
    bind_addresses: List[str]
    type: str = attr.ib(validator=attr.validators.in_(KNOWN_LISTENER_TYPES))
    tls: bool = False

    # http_options is only populated if type=http
    http_options: Optional[HttpListenerConfig] = None


@attr.s(slots=True, frozen=True, auto_attribs=True)
class ManholeConfig:
    """Object describing the configuration of the manhole"""

    username: str = attr.ib(validator=attr.validators.instance_of(str))
    password: str = attr.ib(validator=attr.validators.instance_of(str))
    priv_key: Optional[Key]
    pub_key: Optional[Key]


@attr.s(frozen=True)
class LimitRemoteRoomsConfig:
    enabled: bool = attr.ib(validator=attr.validators.instance_of(bool), default=False)
    complexity: Union[float, int] = attr.ib(
        validator=attr.validators.instance_of((float, int)),  # noqa
        default=1.0,
    )
    complexity_error: str = attr.ib(
        validator=attr.validators.instance_of(str),
        default=ROOM_COMPLEXITY_TOO_GREAT,
    )
    admins_can_join: bool = attr.ib(
        validator=attr.validators.instance_of(bool), default=False
    )


class ServerConfig(Config):
    section = "server"

    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
        self.server_name = config["server_name"]
        self.server_context = config.get("server_context", None)

        try:
            parse_and_validate_server_name(self.server_name)
        except ValueError as e:
            raise ConfigError(str(e))

        self.pid_file = self.abspath(config.get("pid_file"))
        self.soft_file_limit = config.get("soft_file_limit", 0)
        self.daemonize = bool(config.get("daemonize"))
        self.print_pidfile = bool(config.get("print_pidfile"))
        self.user_agent_suffix = config.get("user_agent_suffix")
        self.use_frozen_dicts = config.get("use_frozen_dicts", False)
        self.serve_server_wellknown = config.get("serve_server_wellknown", False)

        # Whether we should serve a "client well-known":
        #  (a) at .well-known/matrix/client on our client HTTP listener
        #  (b) in the response to /login
        #
        # ... which together help ensure that clients use our public_baseurl instead of
        # whatever they were told by the user.
        #
        # For the sake of backwards compatibility with existing installations, this is
        # True if public_baseurl is specified explicitly, and otherwise False. (The
        # reasoning here is that we have no way of knowing that the default
        # public_baseurl is actually correct for existing installations - many things
        # will not work correctly, but that's (probably?) better than sending clients
        # to a completely broken URL.
        self.serve_client_wellknown = False

        public_baseurl = config.get("public_baseurl")
        if public_baseurl is None:
            public_baseurl = f"https://{self.server_name}/"
            logger.info("Using default public_baseurl %s", public_baseurl)
        else:
            self.serve_client_wellknown = True
            if public_baseurl[-1] != "/":
                public_baseurl += "/"
        self.public_baseurl = public_baseurl

        # check that public_baseurl is valid
        try:
            splits = urllib.parse.urlsplit(self.public_baseurl)
        except Exception as e:
            raise ConfigError(f"Unable to parse URL: {e}", ("public_baseurl",))
        if splits.scheme not in ("https", "http"):
            raise ConfigError(
                f"Invalid scheme '{splits.scheme}': only https and http are supported"
            )
        if splits.query or splits.fragment:
            raise ConfigError(
                "public_baseurl cannot contain query parameters or a #-fragment"
            )

        self.extra_well_known_client_content = config.get(
            "extra_well_known_client_content", {}
        )

        if not isinstance(self.extra_well_known_client_content, dict):
            raise ConfigError(
                "extra_well_known_content must be a dictionary of key-value pairs"
            )

        if "m.homeserver" in self.extra_well_known_client_content:
            raise ConfigError(
                "m.homeserver is not supported in extra_well_known_content, "
                "use public_baseurl in base config instead."
            )
        if "m.identity_server" in self.extra_well_known_client_content:
            raise ConfigError(
                "m.identity_server is not supported in extra_well_known_content, "
                "use default_identity_server in base config instead."
            )

        # Whether to enable user presence.
        presence_config = config.get("presence") or {}
        self.use_presence = presence_config.get("enabled")
        if self.use_presence is None:
            self.use_presence = config.get("use_presence", True)

        # Custom presence router module
        # This is the legacy way of configuring it (the config should now be put in the modules section)
        self.presence_router_module_class = None
        self.presence_router_config = None
        presence_router_config = presence_config.get("presence_router")
        if presence_router_config:
            (
                self.presence_router_module_class,
                self.presence_router_config,
            ) = load_module(presence_router_config, ("presence", "presence_router"))

        # whether to enable the media repository endpoints. This should be set
        # to false if the media repository is running as a separate endpoint;
        # doing so ensures that we will not run cache cleanup jobs on the
        # master, potentially causing inconsistency.
        self.enable_media_repo = config.get("enable_media_repo", True)

        # Whether to require authentication to retrieve profile data (avatars,
        # display names) of other users through the client API.
        self.require_auth_for_profile_requests = config.get(
            "require_auth_for_profile_requests", False
        )

        # Whether to require sharing a room with a user to retrieve their
        # profile data
        self.limit_profile_requests_to_users_who_share_rooms = config.get(
            "limit_profile_requests_to_users_who_share_rooms",
            False,
        )

        # Whether to retrieve and display profile data for a user when they
        # are invited to a room
        self.include_profile_data_on_invite = config.get(
            "include_profile_data_on_invite", True
        )

        if "restrict_public_rooms_to_local_users" in config and (
            "allow_public_rooms_without_auth" in config
            or "allow_public_rooms_over_federation" in config
        ):
            raise ConfigError(
                "Can't use 'restrict_public_rooms_to_local_users' if"
                " 'allow_public_rooms_without_auth' and/or"
                " 'allow_public_rooms_over_federation' is set."
            )

        # Check if the legacy "restrict_public_rooms_to_local_users" flag is set. This
        # flag is now obsolete but we need to check it for backward-compatibility.
        if config.get("restrict_public_rooms_to_local_users", False):
            self.allow_public_rooms_without_auth = False
            self.allow_public_rooms_over_federation = False
        else:
            # If set to 'true', removes the need for authentication to access the server's
            # public rooms directory through the client API, meaning that anyone can
            # query the room directory. Defaults to 'false'.
            self.allow_public_rooms_without_auth = config.get(
                "allow_public_rooms_without_auth", False
            )
            # If set to 'true', allows any other homeserver to fetch the server's public
            # rooms directory via federation. Defaults to 'false'.
            self.allow_public_rooms_over_federation = config.get(
                "allow_public_rooms_over_federation", False
            )

        default_room_version = config.get("default_room_version", DEFAULT_ROOM_VERSION)

        # Ensure room version is a str
        default_room_version = str(default_room_version)

        if default_room_version not in KNOWN_ROOM_VERSIONS:
            raise ConfigError(
                "Unknown default_room_version: %s, known room versions: %s"
                % (default_room_version, list(KNOWN_ROOM_VERSIONS.keys()))
            )

        # Get the actual room version object rather than just the identifier
        self.default_room_version = KNOWN_ROOM_VERSIONS[default_room_version]

        # whether to enable search. If disabled, new entries will not be inserted
        # into the search tables and they will not be indexed. Users will receive
        # errors when attempting to search for messages.
        self.enable_search = config.get("enable_search", True)

        self.filter_timeline_limit = config.get("filter_timeline_limit", 100)

        # Whether we should block invites sent to users on this server
        # (other than those sent by local server admins)
        self.block_non_admin_invites = config.get("block_non_admin_invites", False)

        # Options to control access by tracking MAU
        self.limit_usage_by_mau = config.get("limit_usage_by_mau", False)
        self.max_mau_value = 0
        if self.limit_usage_by_mau:
            self.max_mau_value = config.get("max_mau_value", 0)
        self.mau_stats_only = config.get("mau_stats_only", False)

        self.mau_limits_reserved_threepids = config.get(
            "mau_limit_reserved_threepids", []
        )

        self.mau_trial_days = config.get("mau_trial_days", 0)
        self.mau_appservice_trial_days = config.get("mau_appservice_trial_days", {})
        self.mau_limit_alerting = config.get("mau_limit_alerting", True)

        # How long to keep redacted events in the database in unredacted form
        # before redacting them.
        redaction_retention_period = config.get("redaction_retention_period", "7d")
        if redaction_retention_period is not None:
            self.redaction_retention_period: Optional[int] = self.parse_duration(
                redaction_retention_period
            )
        else:
            self.redaction_retention_period = None

        # How long to keep entries in the `users_ips` table.
        user_ips_max_age = config.get("user_ips_max_age", "28d")
        if user_ips_max_age is not None:
            self.user_ips_max_age: Optional[int] = self.parse_duration(user_ips_max_age)
        else:
            self.user_ips_max_age = None

        # Options to disable HS
        self.hs_disabled = config.get("hs_disabled", False)
        self.hs_disabled_message = config.get("hs_disabled_message", "")

        # Admin uri to direct users at should their instance become blocked
        # due to resource constraints
        self.admin_contact = config.get("admin_contact", None)

        ip_range_blacklist = config.get(
            "ip_range_blacklist", DEFAULT_IP_RANGE_BLACKLIST
        )

        # Attempt to create an IPSet from the given ranges

        # Always blacklist 0.0.0.0, ::
        self.ip_range_blacklist = generate_ip_set(
            ip_range_blacklist, ["0.0.0.0", "::"], config_path=("ip_range_blacklist",)
        )

        self.ip_range_whitelist = generate_ip_set(
            config.get("ip_range_whitelist", ()), config_path=("ip_range_whitelist",)
        )
        # The federation_ip_range_blacklist is used for backwards-compatibility
        # and only applies to federation and identity servers.
        if "federation_ip_range_blacklist" in config:
            # Always blacklist 0.0.0.0, ::
            self.federation_ip_range_blacklist = generate_ip_set(
                config["federation_ip_range_blacklist"],
                ["0.0.0.0", "::"],
                config_path=("federation_ip_range_blacklist",),
            )
            # 'federation_ip_range_whitelist' was never a supported configuration option.
            self.federation_ip_range_whitelist = None
        else:
            # No backwards-compatiblity requrired, as federation_ip_range_blacklist
            # is not given. Default to ip_range_blacklist and ip_range_whitelist.
            self.federation_ip_range_blacklist = self.ip_range_blacklist
            self.federation_ip_range_whitelist = self.ip_range_whitelist

        # (undocumented) option for torturing the worker-mode replication a bit,
        # for testing. The value defines the number of milliseconds to pause before
        # sending out any replication updates.
        self.replication_torture_level = config.get("replication_torture_level")

        # Whether to require a user to be in the room to add an alias to it.
        # Defaults to True.
        self.require_membership_for_aliases = config.get(
            "require_membership_for_aliases", True
        )

        # Whether to allow per-room membership profiles through the send of membership
        # events with profile information that differ from the target's global profile.
        self.allow_per_room_profiles = config.get("allow_per_room_profiles", True)

        # The maximum size an avatar can have, in bytes.
        self.max_avatar_size = config.get("max_avatar_size")
        if self.max_avatar_size is not None:
            self.max_avatar_size = self.parse_size(self.max_avatar_size)

        # The MIME types allowed for an avatar.
        self.allowed_avatar_mimetypes = config.get("allowed_avatar_mimetypes")
        if self.allowed_avatar_mimetypes and not isinstance(
            self.allowed_avatar_mimetypes,
            list,
        ):
            raise ConfigError("allowed_avatar_mimetypes must be a list")

        listeners = config.get("listeners", [])
        if not isinstance(listeners, list):
            raise ConfigError("Expected a list", ("listeners",))

        self.listeners = [parse_listener_def(i, x) for i, x in enumerate(listeners)]

        # no_tls is not really supported any more, but let's grandfather it in
        # here.
        if config.get("no_tls", False):
            l2 = []
            for listener in self.listeners:
                if listener.tls:
                    logger.info(
                        "Ignoring TLS-enabled listener on port %i due to no_tls",
                        listener.port,
                    )
                else:
                    l2.append(listener)
            self.listeners = l2

        self.web_client_location = config.get("web_client_location", None)
        # Non-HTTP(S) web client location is not supported.
        if self.web_client_location and not (
            self.web_client_location.startswith("http://")
            or self.web_client_location.startswith("https://")
        ):
            raise ConfigError("web_client_location must point to a HTTP(S) URL.")

        self.gc_thresholds = read_gc_thresholds(config.get("gc_thresholds", None))
        self.gc_seconds = self.read_gc_intervals(config.get("gc_min_interval", None))

        self.limit_remote_rooms = LimitRemoteRoomsConfig(
            **(config.get("limit_remote_rooms") or {})
        )

        bind_port = config.get("bind_port")
        if bind_port:
            if config.get("no_tls", False):
                raise ConfigError("no_tls is incompatible with bind_port")

            self.listeners = []
            bind_host = config.get("bind_host", "")
            gzip_responses = config.get("gzip_responses", True)

            http_options = HttpListenerConfig(
                resources=[
                    HttpResourceConfig(names=["client"], compress=gzip_responses),
                    HttpResourceConfig(names=["federation"]),
                ],
            )

            self.listeners.append(
                ListenerConfig(
                    port=bind_port,
                    bind_addresses=[bind_host],
                    tls=True,
                    type="http",
                    http_options=http_options,
                )
            )

            unsecure_port = config.get("unsecure_port", bind_port - 400)
            if unsecure_port:
                self.listeners.append(
                    ListenerConfig(
                        port=unsecure_port,
                        bind_addresses=[bind_host],
                        tls=False,
                        type="http",
                        http_options=http_options,
                    )
                )

        manhole = config.get("manhole")
        if manhole:
            self.listeners.append(
                ListenerConfig(
                    port=manhole,
                    bind_addresses=["127.0.0.1"],
                    type="manhole",
                )
            )

        manhole_settings = config.get("manhole_settings") or {}
        validate_config(
            _MANHOLE_SETTINGS_SCHEMA, manhole_settings, ("manhole_settings",)
        )

        manhole_username = manhole_settings.get("username", "matrix")
        manhole_password = manhole_settings.get("password", "rabbithole")
        manhole_priv_key_path = manhole_settings.get("ssh_priv_key_path")
        manhole_pub_key_path = manhole_settings.get("ssh_pub_key_path")

        manhole_priv_key = None
        if manhole_priv_key_path is not None:
            try:
                manhole_priv_key = Key.fromFile(manhole_priv_key_path)
            except Exception as e:
                raise ConfigError(
                    f"Failed to read manhole private key file {manhole_priv_key_path}"
                ) from e

        manhole_pub_key = None
        if manhole_pub_key_path is not None:
            try:
                manhole_pub_key = Key.fromFile(manhole_pub_key_path)
            except Exception as e:
                raise ConfigError(
                    f"Failed to read manhole public key file {manhole_pub_key_path}"
                ) from e

        self.manhole_settings = ManholeConfig(
            username=manhole_username,
            password=manhole_password,
            priv_key=manhole_priv_key,
            pub_key=manhole_pub_key,
        )

        metrics_port = config.get("metrics_port")
        if metrics_port:
            logger.warning(METRICS_PORT_WARNING)

            self.listeners.append(
                ListenerConfig(
                    port=metrics_port,
                    bind_addresses=[config.get("metrics_bind_host", "127.0.0.1")],
                    type="http",
                    http_options=HttpListenerConfig(
                        resources=[HttpResourceConfig(names=["metrics"])]
                    ),
                )
            )

        self.cleanup_extremities_with_dummy_events = config.get(
            "cleanup_extremities_with_dummy_events", True
        )

        # The number of forward extremities in a room needed to send a dummy event.
        self.dummy_events_threshold = config.get("dummy_events_threshold", 10)

        self.enable_ephemeral_messages = config.get("enable_ephemeral_messages", False)

        # Inhibits the /requestToken endpoints from returning an error that might leak
        # information about whether an e-mail address is in use or not on this
        # homeserver, and instead return a 200 with a fake sid if this kind of error is
        # met, without sending anything.
        # This is a compromise between sending an email, which could be a spam vector,
        # and letting the client know which email address is bound to an account and
        # which one isn't.
        self.request_token_inhibit_3pid_errors = config.get(
            "request_token_inhibit_3pid_errors",
            False,
        )

        # Whitelist of domain names that given next_link parameters must have
        next_link_domain_whitelist: Optional[List[str]] = config.get(
            "next_link_domain_whitelist"
        )

        self.next_link_domain_whitelist: Optional[Set[str]] = None
        if next_link_domain_whitelist is not None:
            if not isinstance(next_link_domain_whitelist, list):
                raise ConfigError("'next_link_domain_whitelist' must be a list")

            # Turn the list into a set to improve lookup speed.
            self.next_link_domain_whitelist = set(next_link_domain_whitelist)

        templates_config = config.get("templates") or {}
        if not isinstance(templates_config, dict):
            raise ConfigError("The 'templates' section must be a dictionary")

        self.custom_template_directory: Optional[str] = templates_config.get(
            "custom_template_directory"
        )
        if self.custom_template_directory is not None and not isinstance(
            self.custom_template_directory, str
        ):
            raise ConfigError("'custom_template_directory' must be a string")

        self.use_account_validity_in_account_status: bool = (
            config.get("use_account_validity_in_account_status") or False
        )

        self.rooms_to_exclude_from_sync: List[str] = (
            config.get("exclude_rooms_from_sync") or []
        )

        delete_stale_devices_after: Optional[str] = (
            config.get("delete_stale_devices_after") or None
        )

        if delete_stale_devices_after is not None:
            self.delete_stale_devices_after: Optional[int] = self.parse_duration(
                delete_stale_devices_after
            )
        else:
            self.delete_stale_devices_after = None

    def has_tls_listener(self) -> bool:
        return any(listener.tls for listener in self.listeners)

    def generate_config_section(
        self,
        config_dir_path: str,
        data_dir_path: str,
        server_name: str,
        open_private_ports: bool,
        listeners: Optional[List[dict]],
        **kwargs: Any,
    ) -> str:
        _, bind_port = parse_and_validate_server_name(server_name)
        if bind_port is not None:
            unsecure_port = bind_port - 400
        else:
            bind_port = 8448
            unsecure_port = 8008

        pid_file = os.path.join(data_dir_path, "homeserver.pid")

        secure_listeners = []
        unsecure_listeners = []
        private_addresses = ["::1", "127.0.0.1"]
        if listeners:
            for listener in listeners:
                if listener["tls"]:
                    secure_listeners.append(listener)
                else:
                    # If we don't want open ports we need to bind the listeners
                    # to some address other than 0.0.0.0. Here we chose to use
                    # localhost.
                    # If the addresses are already bound we won't overwrite them
                    # however.
                    if not open_private_ports:
                        listener.setdefault("bind_addresses", private_addresses)

                    unsecure_listeners.append(listener)

            secure_http_bindings = indent(
                yaml.dump(secure_listeners), " " * 10
            ).lstrip()

            unsecure_http_bindings = indent(
                yaml.dump(unsecure_listeners), " " * 10
            ).lstrip()

        if not unsecure_listeners:
            unsecure_http_bindings = (
                """- port: %(unsecure_port)s
            tls: false
            type: http
            x_forwarded: true"""
                % locals()
            )

            if not open_private_ports:
                unsecure_http_bindings += (
                    "\n            bind_addresses: ['::1', '127.0.0.1']"
                )

            unsecure_http_bindings += """

            resources:
              - names: [client, federation]
                compress: false"""

            if listeners:
                unsecure_http_bindings = ""

        if not secure_listeners:
            secure_http_bindings = ""

        return (
            """\
        server_name: "%(server_name)s"
        pid_file: %(pid_file)s
        listeners:
          %(secure_http_bindings)s
          %(unsecure_http_bindings)s
        """
            % locals()
        )

    def read_arguments(self, args: argparse.Namespace) -> None:
        if args.manhole is not None:
            self.manhole = args.manhole
        if args.daemonize is not None:
            self.daemonize = args.daemonize
        if args.print_pidfile is not None:
            self.print_pidfile = args.print_pidfile

    @staticmethod
    def add_arguments(parser: argparse.ArgumentParser) -> None:
        server_group = parser.add_argument_group("server")
        server_group.add_argument(
            "-D",
            "--daemonize",
            action="store_true",
            default=None,
            help="Daemonize the homeserver",
        )
        server_group.add_argument(
            "--print-pidfile",
            action="store_true",
            default=None,
            help="Print the path to the pidfile just before daemonizing",
        )
        server_group.add_argument(
            "--manhole",
            metavar="PORT",
            dest="manhole",
            type=int,
            help="Turn on the twisted telnet manhole service on the given port.",
        )

    def read_gc_intervals(self, durations: Any) -> Optional[Tuple[float, float, float]]:
        """Reads the three durations for the GC min interval option, returning seconds."""
        if durations is None:
            return None

        try:
            if len(durations) != 3:
                raise ValueError()
            return (
                self.parse_duration(durations[0]) / 1000,
                self.parse_duration(durations[1]) / 1000,
                self.parse_duration(durations[2]) / 1000,
            )
        except Exception:
            raise ConfigError(
                "Value of `gc_min_interval` must be a list of three durations if set"
            )


def is_threepid_reserved(
    reserved_threepids: List[JsonDict], threepid: JsonDict
) -> bool:
    """Check the threepid against the reserved threepid config
    Args:
        reserved_threepids: List of reserved threepids
        threepid: The threepid to test for

    Returns:
        Is the threepid undertest reserved_user
    """

    for tp in reserved_threepids:
        if threepid["medium"] == tp["medium"] and threepid["address"] == tp["address"]:
            return True
    return False


def read_gc_thresholds(
    thresholds: Optional[List[Any]],
) -> Optional[Tuple[int, int, int]]:
    """Reads the three integer thresholds for garbage collection. Ensures that
    the thresholds are integers if thresholds are supplied.
    """
    if thresholds is None:
        return None
    try:
        assert len(thresholds) == 3
        return int(thresholds[0]), int(thresholds[1]), int(thresholds[2])
    except Exception:
        raise ConfigError(
            "Value of `gc_threshold` must be a list of three integers if set"
        )


def parse_listener_def(num: int, listener: Any) -> ListenerConfig:
    """parse a listener config from the config file"""
    if not isinstance(listener, dict):
        raise ConfigError("Expected a dictionary", ("listeners", str(num)))

    listener_type = listener["type"]
    # Raise a helpful error if direct TCP replication is still configured.
    if listener_type == "replication":
        raise ConfigError(DIRECT_TCP_ERROR, ("listeners", str(num), "type"))

    port = listener.get("port")
    if type(port) is not int:
        raise ConfigError("Listener configuration is lacking a valid 'port' option")

    tls = listener.get("tls", False)

    bind_addresses = listener.get("bind_addresses", [])
    bind_address = listener.get("bind_address")
    # if bind_address was specified, add it to the list of addresses
    if bind_address:
        bind_addresses.append(bind_address)

    # if we still have an empty list of addresses, use the default list
    if not bind_addresses:
        if listener_type == "metrics":
            # the metrics listener doesn't support IPv6
            bind_addresses.append("0.0.0.0")
        else:
            bind_addresses.extend(DEFAULT_BIND_ADDRESSES)

    http_config = None
    if listener_type == "http":
        try:
            resources = [
                HttpResourceConfig(**res) for res in listener.get("resources", [])
            ]
        except ValueError as e:
            raise ConfigError("Unknown listener resource") from e

        http_config = HttpListenerConfig(
            x_forwarded=listener.get("x_forwarded", False),
            resources=resources,
            additional_resources=listener.get("additional_resources", {}),
            tag=listener.get("tag"),
            request_id_header=listener.get("request_id_header"),
            experimental_cors_msc3886=listener.get("experimental_cors_msc3886", False),
        )

    return ListenerConfig(port, bind_addresses, listener_type, tls, http_config)


_MANHOLE_SETTINGS_SCHEMA = {
    "type": "object",
    "properties": {
        "username": {"type": "string"},
        "password": {"type": "string"},
        "ssh_priv_key_path": {"type": "string"},
        "ssh_pub_key_path": {"type": "string"},
    },
}