Commit Graph

710 Commits (7ee24c5674a36dc9cd7163cfdd3e14b74570dc77)

Author SHA1 Message Date
Neil Johnson ee4df7fd7a
Merge branch 'develop' into neilj/room_capabilities 2019-01-30 10:28:08 +00:00
Neil Johnson c5a0f82cca define room dispositions for use in exposing room capabilities 2019-01-30 10:24:24 +00:00
Neil Johnson c7837dce24 reflect that rooms v3 is a stable room version 2019-01-30 09:33:30 +00:00
Erik Johnston a1b0e1879b Enable room version v3 2019-01-29 23:09:10 +00:00
Erik Johnston a696c48133 Merge branch 'develop' of github.com:matrix-org/synapse into erikj/redactions_eiah 2019-01-29 22:00:33 +00:00
Erik Johnston 47e2dd1994 Drop vdh support 2019-01-29 21:24:34 +00:00
Erik Johnston 84af577356 Implement event format v2 2019-01-29 18:06:11 +00:00
Erik Johnston b82a76c384 Finish comment... 2019-01-29 13:50:59 +00:00
Erik Johnston 64c1bd1d21 Remove dead function 2019-01-29 12:06:28 +00:00
Erik Johnston 7709d2bd16 Implement rechecking of redactions 2019-01-29 11:56:20 +00:00
Erik Johnston 7a3ec5b022 Add RoomVersions.V3 constant, without enabling it
We add the constant, but don't add it to the known room versions. This
lets us start adding V3 logic, but the servers will never join or create
V3 rooms
2019-01-29 11:55:33 +00:00
Erik Johnston 5180f12bae Replace usage of builder.user_id with builder.sender
`.user_id` is proxed to `.sender` in FrozenEvent, so this has no
functional change
2019-01-29 11:18:38 +00:00
Erik Johnston ae2a957dba Pass through room version to event auth 2019-01-25 18:31:41 +00:00
Neil Johnson 893107be78 backout v3 2019-01-25 17:27:36 +00:00
Neil Johnson 53ef4da8c2 track unstable room v3 2019-01-25 11:04:11 +00:00
Andrew Morgan b1b6dba2d2
Merge pull request #4415 from matrix-org/anoa/full_search_upgraded_rooms
Ability to search entire room history after upgrading room
2019-01-25 10:49:58 +00:00
Erik Johnston 664b7a2920
Merge pull request #4437 from matrix-org/erikj/event_format_version_v2
Add support for persisting event format versions
2019-01-24 18:32:30 +00:00
Richard van der Hoff 8ea509a935
Update synapse/api/filtering.py
Co-Authored-By: anoadragon453 <1342360+anoadragon453@users.noreply.github.com>
2019-01-24 17:21:35 +00:00
Erik Johnston c5a296b10c Add support for persisting event format versions
Currently we only have the one event format version defined, but this
adds the necessary infrastructure to persist and fetch the format
versions alongside the events.

We specify the format version rather than the room version as:

1. We don't necessarily know the room version, existing events may be
   either v1 or v2.
2. We'd need to be careful to prevent/handle correctly if different
   events in the same room reported to be of different versions, which
   sounds annoying.
2019-01-23 11:30:01 +00:00
Neil Johnson d619b113ed Fix None guard in config.server.is_threepid_reserved 2019-01-22 16:52:29 +00:00
Andrew Morgan c433f61091 Ensure new filter is actually created 2019-01-22 12:06:36 +00:00
Andrew Morgan c9bfb058d8 Fix a bug with single-room search searching all rooms
* Create a new method for getting predecessor rooms
* Remove formatting change
2019-01-22 12:00:41 +00:00
Erik Johnston 35e1d67b4e Merge branch 'develop' of github.com:matrix-org/synapse into erikj/fed_v2_invite_server 2019-01-21 14:04:19 +00:00
Erik Johnston 5f54765587
Merge pull request #4390 from matrix-org/erikj/versioned_fed_apis
Add groundwork for new versions of federation APIs
2019-01-21 11:44:05 +00:00
Andrew Morgan 702c4b750c Migrate encryption state on room upgrade (#4411)
* Migrate encryption state on room upgrade

Signed-off-by: Andrew Morgan <andrew@amorgan.xyz>

* Add changelog file
2019-01-21 20:42:58 +11:00
Andrew Morgan df3a661e4a Search for messages across predecessor rooms
Signed-off-by: Andrew Morgan <andrew@amorgan.xyz>
2019-01-18 11:19:20 +00:00
Neil Johnson 9ec56d6935 ALL_USER_TYPES should be a tuple 2019-01-15 14:38:15 +00:00
Erik Johnston 4a4d2e17bc Add /v2/invite federation API 2019-01-15 13:22:44 +00:00
Erik Johnston bb63e7ca4f Add groundwork for new versions of federation APIs 2019-01-15 11:14:34 +00:00
Richard van der Hoff e0910d0145 Merge branch rav/macaroon_key_fix_0.34 into rav/macaroon_key_fix_0.34.1
Fixes #4371
2019-01-10 14:12:50 +00:00
Richard van der Hoff aa70d24125 Merge branch 'rav/macaroon_key_fix' into rav/macaroon_key_fix_0.34 2019-01-10 12:58:33 +00:00
Richard van der Hoff 566947ff34 Skip macaroon check for access tokens in the db 2019-01-10 12:57:21 +00:00
Erik Johnston b970cb0e96 Refactor request sending to have better excpetions (#4358)
* Correctly retry and back off if we get a HTTPerror response

* Refactor request sending to have better excpetions

MatrixFederationHttpClient blindly reraised exceptions to the caller
without differentiating "expected" failures (e.g. connection timeouts
etc) versus more severe problems (e.g. programming errors).

This commit adds a RequestSendFailed exception that is raised when
"expected" failures happen, allowing the TransactionQueue to log them as
warnings while allowing us to log other exceptions as actual exceptions.
2019-01-08 11:04:28 +00:00
Michael Telatynski a27e501b09 fix the check for whether `is_url` to match all the other ones in codebase (#3405)
Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>
2019-01-06 21:43:25 +00:00
Richard van der Hoff cd018e3543
Merge pull request #4307 from matrix-org/erikj/v2_rooms
Add v2 room version
2018-12-24 10:48:59 +01:00
Erik Johnston df89f8afb8 Add v2 room version 2018-12-18 18:10:37 +00:00
Neil Johnson d2f7c4e6b1
create support user (#4141)
Allow for the creation of a support user.

A support user can access the server, join rooms, interact with other users, but does not appear in the user directory nor does it contribute to monthly active user limits.
2018-12-14 18:20:59 +00:00
Travis Ralston 1737753a62 Add an option to enable recording IPs for appservice users (#3831) 2018-12-04 12:44:41 +01:00
Travis Ralston c68aab1536
Merge pull request #4004 from matrix-org/travis/login-terms
Add m.login.terms to the registration flow
2018-11-01 11:03:38 -06:00
Erik Johnston b3dd6fa981 Add STATE_V2_TEST room version 2018-11-01 11:43:46 +00:00
Travis Ralston d1e7b9c44c Merge branch 'develop' into travis/login-terms 2018-10-31 13:15:14 -06:00
Amber Brown f79f454485
Remove deprecated v1 key exchange endpoint (#4119) 2018-10-31 22:29:02 +11:00
Richard van der Hoff 0f7d1c9906 Basic initial support for room upgrades
Currently just creates a new, empty, room, and sends a tombstone in the old
room.
2018-10-25 19:10:24 +01:00
Travis Ralston 54def42c19 Merge branch 'develop' into travis/login-terms 2018-10-24 13:22:59 -06:00
Richard van der Hoff 7e07d25ed6 Allow backslashes in event field filters
Fixes a bug introduced in https://github.com/matrix-org/synapse/pull/1783 which
meant that single backslashes were not allowed in event field filters.

The intention here is to allow single-backslashes, but disallow
double-backslashes.
2018-10-24 11:11:24 +01:00
Travis Ralston f293d124b6 Merge branch 'develop' into travis/login-terms 2018-10-15 14:44:32 -06:00
David Baker 83e72bb2f0 PR feedback pt. 1 2018-10-12 11:26:18 +01:00
David Baker b8d9e108be Fix mergefail 2018-10-09 18:04:21 +01:00
David Baker dc045ef202 Merge remote-tracking branch 'origin/develop' into dbkr/e2e_backups 2018-10-09 10:05:02 +01:00
Travis Ralston fd99787162 Incorporate Dave's work for GDPR login flows
As per https://github.com/vector-im/riot-web/issues/7168#issuecomment-419996117
2018-10-03 15:57:42 -06:00
Amber Brown 6e05fd032c
Fix userconsent on Python 3 (#3938) 2018-10-02 00:11:58 +10:00
Schnuffle dc5db01ff2 Replaced all occurences of e.message with str(e)
Signed-off-by: Schnuffle  <schnuffle@github.com>
2018-09-27 13:38:50 +02:00
Hubert Chathi 3801b8aa03 try to make flake8 and isort happy 2018-09-06 11:35:19 -04:00
Richard van der Hoff 87c18d12ee Implement 'event_format' filter param in /sync
This has been specced and part-implemented; let's implement it for /sync (but
no other endpoints yet :/).
2018-09-04 15:20:09 +01:00
Neil Johnson 301cb60d0b assert rather than warn 2018-08-31 17:29:35 +01:00
Neil Johnson 0b01281e77 move threepid checker to config, add missing yields 2018-08-31 17:11:11 +01:00
Neil Johnson e8e540630e fix reference to is_threepid_reserved 2018-08-31 16:09:15 +01:00
Neil Johnson 09f3cf1a7e ensure post registration auth checks do not fail erroneously 2018-08-31 15:42:51 +01:00
Neil Johnson ea068d6f3c fix bug where preserved threepid user comes to sign up and server is mau blocked 2018-08-31 10:49:14 +01:00
Erik Johnston 05077e06fa Change admin_uri to admin_contact in config and errors 2018-08-24 16:51:27 +01:00
Hubert Chathi 83caead95a
Merge branch 'develop' into e2e_backups 2018-08-24 11:44:26 -04:00
Erik Johnston cd77270a66 Implement trail users 2018-08-23 19:17:19 +01:00
Erik Johnston fd2dbf1836 Merge branch 'develop' of github.com:matrix-org/synapse into neilj/server_notices_on_blocking 2018-08-22 17:06:10 +01:00
Erik Johnston 9643a6f7f2 Update notice format 2018-08-22 17:00:29 +01:00
Erik Johnston 3bf8bab8f9
Merge pull request #3673 from matrix-org/erikj/refactor_state_handler
Refactor state module to support multiple room versions
2018-08-22 10:04:55 +01:00
Amber Brown 324525f40c
Port over enough to get some sytests running on Python 3 (#3668) 2018-08-20 23:54:49 +10:00
Erik Johnston 4d664278af Merge branch 'develop' of github.com:matrix-org/synapse into erikj/refactor_state_handler 2018-08-20 14:49:43 +01:00
Neil Johnson e07970165f rename error code 2018-08-18 14:39:45 +01:00
Neil Johnson c5171bf171 special case server_notices_mxid 2018-08-18 12:33:07 +01:00
Neil Johnson 3ee57bdcbb Merge branch 'develop' of github.com:matrix-org/synapse into neilj/server_notices_on_blocking 2018-08-17 14:34:10 +01:00
Neil Johnson b5f638f1f4 Merge branch 'develop' of github.com:matrix-org/synapse into neilj/server_notices_on_blocking 2018-08-17 14:04:15 +01:00
Neil Johnson 69c49d3fa3
Merge branch 'develop' into neilj/limit_exceeded_error 2018-08-17 12:44:26 +00:00
Neil Johnson bcfeb44afe call reap on start up and fix under reaping bug 2018-08-16 22:55:32 +01:00
Neil Johnson 13ad9930c8 add new error type ResourceLimit 2018-08-16 18:02:02 +01:00
Neil Johnson fc5d937550 Merge branch 'develop' of github.com:matrix-org/synapse into neilj/server_notices_on_blocking 2018-08-15 16:31:40 +01:00
Neil Johnson c24fc9797b add new event types 2018-08-15 15:04:30 +01:00
Neil Johnson 87a824bad1 clean up AuthError 2018-08-15 11:58:03 +01:00
Neil Johnson b8429c7c81 update error codes for resource limiting 2018-08-15 10:19:48 +01:00
Neil Johnson ab035bdeac replace admin_email with admin_uri for greater flexibility 2018-08-15 10:16:41 +01:00
Neil Johnson 19b433e3f4 Merge branch 'develop' of github.com:matrix-org/synapse into neilj/admin_email 2018-08-14 17:44:46 +01:00
Neil Johnson 2545993ce4 make comments clearer 2018-08-14 15:48:12 +01:00
Neil Johnson 9b75c78b4d support server notice state events for resource limits 2018-08-14 11:20:41 +01:00
Neil Johnson f4b49152e2 support admin_email config and pass through into blocking errors, return AuthError in all cases 2018-08-13 21:09:47 +01:00
Neil Johnson ce7de9ae6b Revert "support admin_email config and pass through into blocking errors, return AuthError in all cases"
This reverts commit 0d43f991a1.
2018-08-13 18:06:18 +01:00
Neil Johnson 0d43f991a1 support admin_email config and pass through into blocking errors, return AuthError in all cases 2018-08-13 18:00:23 +01:00
Matthew Hodgson 0abb205b47 blindly incorporate PR review - needs testing & fixing 2018-08-12 19:14:31 -04:00
Matthew Hodgson 8ae64b270f implement /room_keys/version too (untested) 2018-08-12 19:14:31 -04:00
Neil Johnson 885ea9c602 rename _user_last_seen_monthly_active 2018-08-09 18:02:12 +01:00
Neil Johnson c1f9dec92a fix errant parenthesis 2018-08-09 17:43:26 +01:00
Neil Johnson 09cf130898 only block on sync where user is not part of the mau cohort 2018-08-09 17:39:12 +01:00
Erik Johnston 152c0aa58e Add constants for room versions 2018-08-09 14:55:47 +01:00
Neil Johnson 839a317c96
fix pep8 too many lines 2018-08-08 17:39:04 +01:00
Neil Johnson 5298d79fb5
Merge branch 'develop' into neilj/disable_hs 2018-08-08 16:13:03 +00:00
Richard van der Hoff 8521ae13e3
Merge pull request #3654 from matrix-org/rav/room_versions
Support for room versioning
2018-08-08 17:10:53 +01:00
Richard van der Hoff 3523f5432a Don't expose default_room_version as config opt 2018-08-07 12:51:57 +01:00
Neil Johnson 7bcf126b18 Merge branch 'neilj/mau_tracker' of github.com:matrix-org/synapse into neilj/disable_hs 2018-08-06 21:39:44 +01:00
Neil Johnson 1911c037cb update comments to reflect new sig 2018-08-06 18:01:46 +01:00
Neil Johnson 42c6823827 disable HS from config 2018-08-04 22:07:04 +01:00
Neil Johnson e10830e976 wip commit - tests failing 2018-08-03 17:55:50 +01:00
Richard van der Hoff 0d63d93ca8 Enforce compatibility when processing make_join requests
Reject make_join requests from servers which do not support the room version.

Also include the room version in the response.
2018-08-03 16:08:32 +01:00
Richard van der Hoff 0ca459ea33 Basic support for room versioning
This is the first tranche of support for room versioning. It includes:
 * setting the default room version in the config file
 * new room_version param on the createRoom API
 * storing the version of newly-created rooms in the m.room.create event
 * fishing the version of existing rooms out of the m.room.create event
2018-08-03 16:08:32 +01:00
Neil Johnson 897c51d274 Merge branch 'develop' of github.com:matrix-org/synapse into neilj/mau_tracker 2018-08-03 13:40:47 +01:00
Richard van der Hoff 1fa98495d0
Merge pull request #3639 from matrix-org/rav/refactor_error_handling
Clean up handling of errors from outbound requests
2018-08-02 17:38:24 +01:00
Neil Johnson 74b1d46ad9 do mau checks based on monthly_active_users table 2018-08-02 16:57:35 +01:00
Neil Johnson 00f99f74b1 insertion into monthly_active_users 2018-08-02 13:47:19 +01:00
Neil Johnson 085435e13a
Merge pull request #3630 from matrix-org/neilj/mau_sign_in_log_in_limits
Initial impl of capping MAU
2018-08-01 15:58:45 +00:00
Richard van der Hoff 01e93f48ed Kill off MatrixCodeMessageException
This code brings the SimpleHttpClient into line with the
MatrixFederationHttpClient by having it raise HttpResponseExceptions when a
request fails (rather than trying to parse for matrix errors and maybe raising
MatrixCodeMessageException).

Then, whenever we were checking for MatrixCodeMessageException and turning them
into SynapseErrors, we now need to check for HttpResponseExceptions and call
to_synapse_error.
2018-08-01 16:02:46 +01:00
Richard van der Hoff 018d75a148 Refactor code for turning HttpResponseException into SynapseError
This commit replaces SynapseError.from_http_response_exception with
HttpResponseException.to_synapse_error.

The new method actually returns a ProxiedRequestError, which allows us to pass
through additional metadata from the API call.
2018-08-01 16:02:46 +01:00
Richard van der Hoff fa7dc889f1 Be more careful which errors we send back over the C-S API
We really shouldn't be sending all CodeMessageExceptions back over the C-S API;
it will include things like 401s which we shouldn't proxy.

That means that we need to explicitly turn a few HttpResponseExceptions into
SynapseErrors in the federation layer.

The effect of the latter is that the matrix errcode will get passed through
correctly to calling clients, which might help with some of the random
M_UNKNOWN errors when trying to join rooms.
2018-08-01 16:02:38 +01:00
Amber Brown da7785147d
Python 3: Convert some unicode/bytes uses (#3569) 2018-08-02 00:54:06 +10:00
Neil Johnson 251e6c1210 limit register and sign in on number of monthly users 2018-07-30 15:55:57 +01:00
Matthew Hodgson a75231b507
Deduplicate redundant lazy-loaded members (#3331)
* attempt at deduplicating lazy-loaded members

as per the proposal; we can deduplicate redundant lazy-loaded members
which are sent in the same sync sequence. we do this heuristically
rather than requiring the client to somehow tell us which members it
has chosen to cache, by instead caching the last N members sent to
a client, and not sending them again.  For now we hardcode N to 100.
Each cache for a given (user,device) tuple is in turn cached for up to
X minutes (to avoid the caches building up).  For now we hardcode X to 30.

* add include_redundant_members filter option & make it work

* remove stale todo

* add tests for _get_some_state_from_cache

* incorporate review
2018-07-26 22:51:30 +01:00
Matthew Hodgson d19fba3655 Merge branch 'develop' into matthew/filter_members 2018-07-24 12:39:54 +01:00
Erik Johnston 536bc63a4e
Merge branch 'develop' into erikj/client_apis_move 2018-07-24 09:57:05 +01:00
Matthew Hodgson adfe29ec0b Merge branch 'develop' into matthew/filter_members 2018-07-23 19:21:37 +01:00
Erik Johnston e42510ba63 Use new getters 2018-07-23 13:17:22 +01:00
Erik Johnston 0ecf68aedc Move check_in_room_or_world_readable to Auth 2018-07-20 15:30:59 +01:00
Matthew Hodgson be3adfc331 merge develop pydoc for _get_state_for_groups 2018-07-19 11:26:04 +01:00
Amber Brown 33b60c01b5
Make auth & transactions more testable (#3499) 2018-07-14 07:34:49 +10:00
Amber Brown 49af402019 run isort 2018-07-09 16:09:20 +10:00
Richard van der Hoff 3cf3e08a97 Implementation of server_acls
... as described at
https://docs.google.com/document/d/1EttUVzjc2DWe2ciw4XPtNpUpIl9lWXGEsy2ewDS7rtw.
2018-07-04 19:06:20 +01:00
Matthew Hodgson f4f1cda928 add ip_range_whitelist parameter to limit where ASes can connect from 2018-06-28 20:32:00 +01:00
Amber Brown 6350bf925e
Attempt to be more performant on PyPy (#3462) 2018-06-28 14:49:57 +01:00
Travis Ralston ec1e799e17 Don't print invalid access tokens in the logs
Tokens shouldn't be appearing the logs, valid or invalid. 

Signed-off-by: Travis Ralston <travpc@gmail.com>
2018-06-24 12:17:01 -06:00
Richard van der Hoff 557b686eac Refactor get_send_level to take a power_levels event
it makes it easier for me to reason about
2018-06-14 11:26:27 +01:00
Matthew Hodgson 28f09fcdd5 Merge branch 'develop' into matthew/filter_members 2018-06-04 00:09:17 +03:00
Amber Brown c936a52a9e
Consistently use six's iteritems and wrap lazy keys/values in list() if they're not meant to be lazy (#3307) 2018-05-31 19:03:47 +10:00
Matthew Hodgson 9bbb9f5556 add lazy_load_members to the filter json schema 2018-05-29 04:26:10 +01:00
Matthew Hodgson 7a6df013cc merge develop 2018-05-29 00:25:22 +01:00
Amber Brown 754826a830 Merge remote-tracking branch 'origin/develop' into 3218-official-prom 2018-05-28 18:57:23 +10:00
Richard van der Hoff 08bfc48abf custom error code for not leaving server notices room 2018-05-22 17:27:27 +01:00
Amber Brown a8990fa2ec Merge remote-tracking branch 'origin/develop' into 3218-official-prom 2018-05-22 10:50:26 -05:00
Richard van der Hoff a5e2941aad Reject attempts to send event before privacy consent is given
Returns an M_CONSENT_NOT_GIVEN error (cf
https://github.com/matrix-org/matrix-doc/issues/1252) if consent is not yet
given.
2018-05-22 12:00:47 +01:00
Amber Brown df9f72d9e5 replacing portions 2018-05-21 19:47:37 -05:00
Richard van der Hoff 33f469ba19 Apply some limits to depth to counter abuse
* When creating a new event, cap its depth to 2^63 - 1
* When receiving events, reject any without a sensible depth

As per https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI
2018-05-01 17:54:19 +01:00
Adrian Tschira 36c59ce669 Use six.itervalues in some places
There's more where that came from

Signed-off-by: Adrian Tschira <nota@notafile.com>
2018-04-15 20:39:43 +02:00
Adrian Tschira 6168351877 Add b prefixes to some strings that are bytes in py3
This has no effect on python2

Signed-off-by: Adrian Tschira <nota@notafile.com>
2018-04-04 13:48:51 +02:00
Richard van der Hoff fcfe7f6ad3 Use simplejson throughout
Let's use simplejson rather than json, for consistency.
2018-03-29 22:45:52 +01:00
Erik Johnston fa72803490 Merge branch 'master' of github.com:matrix-org/synapse into develop 2018-03-19 11:41:01 +00:00
Matthew Hodgson b2f2282947 make lazy_load_members configurable in filters 2018-03-19 01:15:13 +00:00
Erik Johnston 926ba76e23 Replace ujson with simplejson 2018-03-15 23:43:31 +00:00
Matthew Hodgson ab9f844aaf
Add federation_domain_whitelist option (#2820)
Add federation_domain_whitelist

gives a way to restrict which domains your HS is allowed to federate with.
useful mainly for gracefully preventing a private but internet-connected HS from trying to federate to the wider public Matrix network
2018-01-22 19:11:18 +01:00
Matthew Hodgson 28a6ccb49c add registrations_require_3pid
lets homeservers specify a whitelist for 3PIDs that users are allowed to associate with.
Typically useful for stopping people from registering with non-work emails
2018-01-19 00:19:58 +00:00
Richard van der Hoff d5f9fb06b0 Refactor UI auth implementation
Instead of returning False when auth is incomplete, throw an exception which
can be caught with a wrapper.
2017-12-05 09:40:05 +00:00
Richard van der Hoff da562bd6a1 Improve comments on get_user_by_access_token
because I have to reverse-engineer this every time.
2017-11-29 15:52:41 +00:00
Richard van der Hoff aa620d09a0 Add a config option to block all room invites (#2457)
- allows sysadmins the ability to lock down their servers so that people can't
send their users room invites.
2017-09-19 16:08:14 +01:00
Erik Johnston ed9a7f5436 Merge pull request #2309 from matrix-org/erikj/user_ip_repl
Fix up user_ip replication commands
2017-07-06 14:33:14 +01:00
Erik Johnston 2c365f4723 Cache macaroon parse and validation
Turns out this can be quite expensive for requests, and is easily
cachable. We don't cache the lookup to the DB so invalidation still
works.
2017-06-29 14:50:18 +01:00
Erik Johnston 8c23221666 Fix up 2017-06-27 15:53:45 +01:00
Erik Johnston ed3d0170d9 Batch upsert user ips 2017-06-27 13:37:04 +01:00