Commit Graph

157 Commits

Author SHA1 Message Date
pascal-fischer
7e5d3bdfe2
[signal] Move dummy signal message handling into dispatcher (#2686) 2024-10-02 15:33:38 +02:00
pascal-fischer
16179db599
[management] Propagate metrics (#2667) 2024-09-30 22:18:10 +02:00
pascal-fischer
cfbcf507fb
propagate meter (#2668) 2024-09-29 20:23:34 +02:00
pascal-fischer
52ae693c9e
[signal] add context to signal-dispatcher (#2662) 2024-09-29 00:22:47 +02:00
Maycon Santos
4c130a0291
Update Go version to 1.23 (#2588) 2024-09-12 13:46:28 +02:00
Maycon Santos
c59a39d27d
Update service package version (#2582) 2024-09-11 19:05:10 +02:00
Zoltan Papp
0c039274a4
[relay] Feature/relay integration (#2244)
This update adds new relay integration for NetBird clients. The new relay is based on web sockets and listens on a single port.

- Adds new relay implementation with websocket with single port relaying mechanism
- refactor peer connection logic, allowing upgrade and downgrade from/to P2P connection
- peer connections are faster since it connects first to relay and then upgrades to P2P
- maintains compatibility with old clients by not using the new relay
- updates infrastructure scripts with new relay service
2024-09-08 12:06:14 +02:00
Gianluca Boiano
f2b5b2e9b5
[misc] Support rpm-ostree based distros in installation script (#2508)
* Detect rpm-ostree-based distro and use proper package manager

* Update kardianos/service module to fix folders detection
2024-09-04 20:22:52 +03:00
pascal-fischer
92a0092ad5
[signal] Use signal dispatcher (#2373) 2024-08-30 15:44:07 +02:00
dependabot[bot]
d92f2b633f
Bump github.com/docker/docker (#2426)
Bumps [github.com/docker/docker](https://github.com/docker/docker) from 26.1.4+incompatible to 26.1.5+incompatible.
- [Release notes](https://github.com/docker/docker/releases)
- [Commits](https://github.com/docker/docker/compare/v26.1.4...v26.1.5)

---
updated-dependencies:
- dependency-name: github.com/docker/docker
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-08-22 18:49:07 +02:00
Maycon Santos
9716be854d
[client] Upgrade fyne version to fix freezing routes window (#2417) 2024-08-13 16:20:06 +02:00
Bethuel Mmbaga
bcce1bf184
Update dependencies and switch systray library (#2309)
* Update dependencies and switch systray library

This commit updates the project's dependencies and switches from the 'getlantern/systray' library to the 'fyne.io/systray' library. It also removes some unused dependencies, improving the maintainability and performance of the project. This change in the system tray library is an upgrade which offers more extensive features and better support.

* Remove legacy_appindicator tag from .goreleaser_ui.yaml
2024-08-07 15:40:43 +03:00
dependabot[bot]
df8b8db068
Bump github.com/docker/docker (#2356)
Bumps [github.com/docker/docker](https://github.com/docker/docker) from 26.1.3+incompatible to 26.1.4+incompatible.
- [Release notes](https://github.com/docker/docker/releases)
- [Commits](https://github.com/docker/docker/compare/v26.1.3...v26.1.4)

---
updated-dependencies:
- dependency-name: github.com/docker/docker
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-08-01 17:20:15 +02:00
dependabot[bot]
1cc341a268
Bump google.golang.org/grpc from 1.64.0 to 1.64.1 (#2248)
Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.64.0 to 1.64.1.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.64.0...v1.64.1)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-07-12 08:52:27 +02:00
pascal-fischer
765aba2c1c
Add context to throughout the project and update logging (#2209)
propagate context from all the API calls and log request ID, account ID and peer ID

---------

Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
2024-07-03 11:33:02 +02:00
dependabot[bot]
0f63737330
Bump golang.org/x/image from 0.10.0 to 0.18.0 (#2205)
Bumps [golang.org/x/image](https://github.com/golang/image) from 0.10.0 to 0.18.0.
- [Commits](https://github.com/golang/image/compare/v0.10.0...v0.18.0)

---
updated-dependencies:
- dependency-name: golang.org/x/image
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-07-02 13:12:28 +02:00
Maycon Santos
4fec709bb1
Release 0.28.0 (#2092)
* compile client under freebsd (#1620)

Compile netbird client under freebsd and now support netstack and userspace modes.
Refactoring linux specific code to share same code with FreeBSD, move to *_unix.go files.

Not implemented yet:

Kernel mode not supported
DNS probably does not work yet
Routing also probably does not work yet
SSH support did not tested yet
Lack of test environment for freebsd (dedicated VM for github runners under FreeBSD required)
Lack of tests for freebsd specific code
info reporting need to review and also implement, for example OS reported as GENERIC instead of FreeBSD (lack of FreeBSD icon in management interface)
Lack of proper client setup under FreeBSD
Lack of FreeBSD port/package

* Add DNS routes (#1943)

Given domains are resolved periodically and resolved IPs are replaced with the new ones. Unless the flag keep_route is set to true, then only new ones are added.
This option is helpful if there are long-running connections that might still point to old IP addresses from changed DNS records.

* Add process posture check (#1693)

Introduces a process posture check to validate the existence and active status of specific binaries on peer systems. The check ensures that files are present at specified paths, and that corresponding processes are running. This check supports Linux, Windows, and macOS systems.


Co-authored-by: Evgenii <mail@skillcoder.com>
Co-authored-by: Pascal Fischer <pascal@netbird.io>
Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
Co-authored-by: Viktor Liu <17948409+lixmal@users.noreply.github.com>
Co-authored-by: Bethuel Mmbaga <bethuelmbaga12@gmail.com>
2024-06-13 13:24:24 +02:00
Viktor Liu
85b8f36ec1
Add basic signal metrics (#2107) 2024-06-13 01:20:46 +02:00
Viktor Liu
94e505480b
Use forked go-netroute (#2115) 2024-06-11 17:21:20 +02:00
Bethuel Mmbaga
d35a79d3b5
Upgrade gRPC and OpenTelemetry packages for compatibility (#2003)
Upgrades `go.opentelemetry.io/otel` from version` v1.11.1` to `v1.26.0`. The upgrade addresses compatibility issues caused by the removal of several sub-packages in the latest OpenTelemetry release, which were causing broken dependencies.

**Key Changes:**
- Upgraded `go.opentelemetry.io/otel` from `v1.11.1` to `v1.26.0`.

- Fixed broken dependencies by replacing the deprecated sub-packages:
  - `go.opentelemetry.io/otel/metric/instrument`
  - `go.opentelemetry.io/otel/metric/instrument/asyncint64`
  - `go.opentelemetry.io/otel/metric/instrument/syncint64`
  
- Upgraded `google.golang.org/grpc` from `v1.56.3`  to `v1.64.0` which deprecate `Dial` and `DialContext` to `NewClient`.
2024-05-27 08:39:18 +02:00
Zoltan Papp
41fe9f84ec
Extend integrated validator with error handling (#2044) 2024-05-24 13:29:25 +02:00
Bethuel Mmbaga
a5811a2d7d
Implement experimental PostgreSQL store (#1939)
* migrate sqlite store to
 generic sql store

* fix conflicts

* init postgres store

* Add postgres store tests

* Refactor postgres store engine name

* fix tests

* Run postgres store tests on linux only

* fix tests

* Refactor

* cascade policy rules on policy deletion

* fix tests

* run postgres cases in new db

* close store connection after tests

* refactor

* using testcontainers

* sync go sum

* remove postgres service

* remove store cleanup

* go mod tidy

* remove env

* use postgres as engine and initialize test store with testcontainer

---------

Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>
2024-05-16 19:28:37 +03:00
dependabot[bot]
3477108ce7
Bump golang.org/x/net from 0.20.0 to 0.23.0 (#1867)
Bumps [golang.org/x/net](https://github.com/golang/net) from 0.20.0 to 0.23.0.
- [Commits](https://github.com/golang/net/compare/v0.20.0...v0.23.0)

---
updated-dependencies:
- dependency-name: golang.org/x/net
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-04-23 12:48:25 +02:00
Zoltan Papp
5204d07811
Pass integrated validator for API (#1814)
Pass integrated validator for API handler
2024-04-15 12:08:38 +02:00
Maycon Santos
3875c29f6b
Revert "Rollback new routing functionality (#1805)" (#1813)
This reverts commit 9f32ccd453.
2024-04-08 18:56:52 +02:00
Viktor Liu
9f32ccd453
Rollback new routing functionality (#1805) 2024-04-05 20:38:49 +02:00
Viktor Liu
7938295190
Feature/exit nodes - Windows and macOS support (#1726) 2024-04-03 11:11:46 +02:00
Zoltan Papp
2d76b058fc
Feature/peer validator (#1553)
Follow up management-integrations changes

move groups to separated packages to avoid circle dependencies
save location information in Login action
2024-03-27 18:48:48 +01:00
Viktor Liu
2475473227
Support client default routes for Linux (#1667)
All routes are now installed in a custom netbird routing table.
Management and wireguard traffic is now marked with a custom fwmark.
When the mark is present the traffic is routed via the main routing table, bypassing the VPN.
When the mark is absent the traffic is routed via the netbird routing table, if:
- there's no match in the main routing table
- it would match the default route in the routing table

IPv6 traffic is blocked when a default route IPv4 route is configured to avoid leakage.
2024-03-21 16:49:28 +01:00
pascal-fischer
846871913d
Add latency checks to peer connection and status output (#1725)
* adding peer healthcheck

* generate proto file

* fix return in udp mux and replace with continue

* use ice agent for latency checks

* fix status output

* remove some logs

* fix status test

* revert bind and ebpf code

* fix error handling on binding response callback

* extend error handling on binding response callback

---------

Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>
2024-03-20 11:18:34 +01:00
Viktor Liu
4a1aee1ae0
Add routes and dns servers to status command (#1680)
* Add routes (client and server) to status command
* Add DNS servers to status output
2024-03-12 19:06:16 +01:00
Viktor Liu
b7a6cbfaa5
Add account usage logic (#1567)
---------

Co-authored-by: Yury Gargay <yury.gargay@gmail.com>
2024-02-22 12:27:08 +01:00
pascal-fischer
51f133fdc6
Extend system meta (#1598)
* wip: add posture checks structs

* add netbird version check

* Refactor posture checks and add version checks

* Add posture check activities (#1445)

* Integrate Endpoints for Posture Checks (#1432)

* wip: add posture checks structs

* add netbird version check

* Refactor posture checks and add version checks

* Implement posture and version checks in API models

* Refactor API models and enhance posture check functionality

* wip: add posture checks endpoints

* go mod tidy

* Reference the posture checks by id's in policy

* Add posture checks management to server

* Add posture checks management mocks

* implement posture checks handlers

* Add posture checks to account copy and fix tests

* Refactor posture checks validation

* wip: Add posture checks handler tests

* Add JSON encoding support to posture checks

* Encode posture checks to correct api response object

* Refactored posture checks implementation to align with the new API schema

* Refactor structure of `Checks` from slice to map

* Cleanup

* Add posture check activities (#1445)

* Revert map to use list of checks

* Add posture check activity events

* Refactor posture check initialization in account test

* Improve the handling of version range in posture check

* Fix tests and linter

* Remove max_version from NBVersionCheck

* Added unit tests for NBVersionCheck

* go mod tidy

* Extend policy endpoint with posture checks (#1450)

* Implement posture and version checks in API models

* go mod tidy

* Allow attaching posture checks to policy

* Update error message for linked posture check on deleting

* Refactor PostureCheck and Checks structures

* go mod tidy

* Add validation for non-existing posture checks

* fix unit tests

* use Wt version

* Remove the enabled field, as posture check will now automatically be activated by default when attaching to a policy

* wip: add posture checks structs

* add netbird version check

* Refactor posture checks and add version checks

* Add posture check activities (#1445)

* Integrate Endpoints for Posture Checks (#1432)

* wip: add posture checks structs

* add netbird version check

* Refactor posture checks and add version checks

* Implement posture and version checks in API models

* Refactor API models and enhance posture check functionality

* wip: add posture checks endpoints

* go mod tidy

* Reference the posture checks by id's in policy

* Add posture checks management to server

* Add posture checks management mocks

* implement posture checks handlers

* Add posture checks to account copy and fix tests

* Refactor posture checks validation

* wip: Add posture checks handler tests

* Add JSON encoding support to posture checks

* Encode posture checks to correct api response object

* Refactored posture checks implementation to align with the new API schema

* Refactor structure of `Checks` from slice to map

* Cleanup

* Add posture check activities (#1445)

* Revert map to use list of checks

* Add posture check activity events

* Refactor posture check initialization in account test

* Improve the handling of version range in posture check

* Fix tests and linter

* Remove max_version from NBVersionCheck

* Added unit tests for NBVersionCheck

* go mod tidy

* Extend policy endpoint with posture checks (#1450)

* Implement posture and version checks in API models

* go mod tidy

* Allow attaching posture checks to policy

* Update error message for linked posture check on deleting

* Refactor PostureCheck and Checks structures

* go mod tidy

* Add validation for non-existing posture checks

* fix unit tests

* use Wt version

* Remove the enabled field, as posture check will now automatically be activated by default when attaching to a policy

* Extend network map generation with posture checks (#1466)

* Apply posture checks to network map generation

* run policy posture checks on peers to connect

* Refactor and streamline policy posture check process for peers to connect.

* Add posture checks testing in a network map

* Remove redundant nil check in policy.go

* Refactor peer validation check in policy.go

* Update 'Check' function signature and use logger for version check

* Refactor posture checks run on sources and updated the validation func

* Update peer validation

* fix tests

* improved test coverage for policy posture check

* Refactoring

* Extend NetBird agent to collect kernel version (#1495)

* Add KernelVersion field to LoginRequest

* Add KernelVersion to system info retrieval

* Fix tests

* Remove Core field from system info

* Replace Core field with new OSVersion field in system info

* Added WMI dependency to info_windows.go

* Add OS Version posture checks  (#1479)

* Initial support of Geolocation service (#1491)

* Add Geo Location posture check (#1500)

* wip: implement geolocation check

* add geo location posture checks to posture api

* Merge branch 'feature/posture-checks' into geo-posture-check

* Remove CityGeoNameID and update required fields in API

* Add geoLocation checks to posture checks handler tests

* Implement geo location-based checks for peers

* Update test values and embed location struct in peer system

* add support for country wide checks

* initialize country code regex once

* Fix peer meta core compability with older clients (#1515)

* Refactor extraction of OSVersion in grpcserver

* Ignore lint check

* Fix peer meta core compability with older management (#1532)

* Revert core field deprecation

* fix tests

* Extend peer meta with location information (#1517)

This PR uses the geolocation service to resolve IP to location. 
The lookup happens once on the first connection - when a client calls the Sync func.
The location is stored as part of the peer:

* Add Locations endpoints (#1516)

* add locations endpoints

* Add sqlite3 check and database generation in geolite script

* Add SQLite storage for geolocation data

* Refactor file existence check into a separate function

* Integrate geolocation services into management application

* Refactoring

* Refactor city retrieval to include Geonames ID

* Add signature verification for GeoLite2 database download

* Change to in-memory database for geolocation store

* Merge manager to geolocation

* Update GetAllCountries to return Country name and iso code

* fix tests

* Add reload to SqliteStore

* Add geoname indexes

* move db file check to connectDB

* Add concurrency safety to SQL queries and database reloading

The commit adds mutex locks to the GetAllCountries and GetCitiesByCountry functions to ensure thread-safety during database queries. Additionally, it introduces a mechanism to safely close the old database connection before a new connection is established upon reloading, which improves the reliability of database operations. Lastly, it moves the checking of database file existence to the connectDB function.

* Add sha256 sum check to geolocation store before reload

* Use read lock

* Check SHA256 twice when reload geonames db

---------

Co-authored-by: Yury Gargay <yury.gargay@gmail.com>

* Add tests and validation for empty peer location in GeoLocationCheck (#1546)

* Disallow Geo check creation/update without configured Geo DB (#1548)

* Fix shared access to in memory copy of geonames.db (#1550)

* Trim suffix in when evaluate Min Kernel Version in OS check

* Add Valid Peer Windows Kernel version test

* Add Geolocation handler tests (#1556)

* Implement user admin checks in posture checks

* Add geolocation handler tests

* Mark initGeolocationTestData as helper func

* Add error handling to geolocation database closure

* Add cleanup function to close geolocation resources

* Simplify checks definition serialisation (#1555)

* Regenerate network map on posture check update (#1563)

* change network state and generate map on posture check update

* Refactoring

* Make city name optional (#1575)

* Do not return empty city name

* Validate action param of geo location checks (#1577)

We only support allow and deny

* Switch realip middleware to upstream (#1578)

* Be more silent in download-geolite2.sh script

* Fix geonames db reload (#1580)

* Ensure posture check name uniqueness when create (#1594)

* Enhance the management of posture checks (#1595)

* add a correct min version and kernel for os posture check example

* handle error when geo or location db is nil

* expose all peer location details in api response

* Check for nil geolocation manager only

* Validate posture check before save

* bump open api version

* add peer location fields to toPeerListItemResponse

* Feautre/extend sys meta (#1536)

* Collect network addresses

* Add Linux sys product info

* Fix peer meta comparison

* Collect sys info on mac

* Add windows sys info

* Fix test

* Fix test

* Fix grpc client

* Ignore test

* Fix test

* Collect IPv6 addresses

* Change the IP to IP + net

* fix tests

* Use netip on server side

* Serialize netip to json

* Extend Peer metadata with cloud detection (#1552)

* add cloud detection + test binary

* test windows exe

* Collect IPv6 addresses

* Change the IP to IP + net

* switch to forked cloud detect lib

* new test builds

* new GCE build

* discontinue using library but local copy instead

* fix imports

* remove openstack check

* add hierarchy to cloud check

* merge IBM and SoftLayer

* close resp bodies and use os lib for file reading

* close more resp bodies

* fix error check logic

* parallelize IBM checks

* fix response value

* go mod tidy

* include context + change kubernetes detection

* add context in info functions

* extract platform into separate field

* fix imports

* add missing wmi import

---------

Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>

---------

Co-authored-by: pascal-fischer <32096965+pascal-fischer@users.noreply.github.com>

* generate proto

* remove test binaries

---------

Co-authored-by: bcmmbaga <bethuelmbaga12@gmail.com>
Co-authored-by: Yury Gargay <yury.gargay@gmail.com>
Co-authored-by: Zoltan Papp <zoltan.pmail@gmail.com>
2024-02-20 11:53:11 +01:00
Yury Gargay
9bc7b9e897
Add initial support of device posture checks (#1540)
This PR implements the following posture checks:

* Agent minimum version allowed
* OS minimum version allowed
* Geo-location based on connection IP

For the geo-based location, we rely on GeoLite2 databases which are free IP geolocation databases. MaxMind was tested and we provide a script that easily allows to download of all necessary files, see infrastructure_files/download-geolite2.sh.

The OpenAPI spec should extensively cover the life cycle of current version posture checks.
2024-02-20 09:59:56 +01:00
Yury Gargay
fb30931365
Expose trusted proxy list and counter configuration for realip middleware (#1535) 2024-02-08 14:40:40 +01:00
Yury Gargay
71cd2e3e03
Update grpc-middleware to bring changes related to realip (#1526) 2024-02-05 14:18:15 +01:00
Yury Gargay
93cab49696
Extract peer real IP from Load Balancer when possible (#1510) 2024-01-31 16:02:24 +01:00
Zoltan Papp
4771fed64f
Support disabled resolved stub server mode (#1493)
In the case of disabled stub listeren the list of name servers is unordered. The solution is to configure the resolv.conf file directly instead of dbus API.
Because third-party services also can manipulate the DNS settings the agent watch the resolv.conf file and keep it up to date.

- apply file type DNS manager if in the name server list does not exist the 127.0.0.53 address
- watching the resolv.conf file with inotify service and overwrite all the time if the configuration has changed and it invalid
- fix resolv.conf generation algorithm
2024-01-24 16:47:26 +01:00
Viktor Liu
5ac9f9fe2f
Tidy up mod (#1492) 2024-01-22 23:05:02 +01:00
Maycon Santos
93646e6a13
Upgrade integrations versions to 8a7c87accb22 (#1482)
* Upgrade integrations versions to 8a7c87accb22

* sync go sum
2024-01-18 18:20:59 +01:00
dependabot[bot]
dd7fcbd083
Bump golang.org/x/crypto from 0.14.0 to 0.17.0 (#1401)
Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.14.0 to 0.17.0.
- [Commits](https://github.com/golang/crypto/compare/v0.14.0...v0.17.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2024-01-18 16:02:08 +01:00
xcf13363175
d5f330b9c0
Fix musl build (#1480)
* Update go.mod

* Update go.sum
2024-01-18 15:44:33 +01:00
pascal-fischer
5de4acf2fe
Integrate Rosenpass (#1153)
This PR aims to integrate Rosenpass with NetBird. It adds a manager for Rosenpass that starts a Rosenpass server and handles the managed peers. It uses the cunicu/go-rosenpass implementation. Rosenpass will then negotiate a pre-shared key every 2 minutes and apply it to the wireguard connection.

The Feature can be enabled by setting a flag during the netbird up --enable-rosenpass command.

If two peers are both support and have the Rosenpass feature enabled they will create a post-quantum secure connection. If one of the peers or both don't have this feature enabled or are running an older version that does not have this feature yet, the NetBird client will fall back to a plain Wireguard connection without pre-shared keys for those connections (keeping Rosenpass negotiation for the rest).

Additionally, this PR includes an update of all Github Actions workflows to use go version 1.21.0 as this is a requirement for the integration.

---------

Co-authored-by: braginini <bangvalo@gmail.com>
Co-authored-by: Maycon Santos <mlsmaycon@gmail.com>
2024-01-08 12:25:35 +01:00
Zoltan Papp
1de3bb5420
Netstack (#1403)
Add netstack support for the agent to run it without privileges.

- use interface for tun device
- use common IPC for userspace WireGuard integration
- move udpmux creation and sharedsock to tun layer
2024-01-03 16:06:20 +01:00
Maycon Santos
c1caec3fcb
Update management-integrations/additions (#1425) 2024-01-01 20:17:29 +01:00
Maycon Santos
f780f17f85
Use integrated activity store (#1421)
---------

Co-authored-by: braginini <bangvalo@gmail.com>
2024-01-01 19:11:11 +01:00
Zoltan Papp
bc3d647d6b
Update pion v3 (#1398)
Update Pion related versions to the latest
---------

Co-authored-by: Yury Gargay <yury.gargay@gmail.com>
2023-12-20 23:02:42 +01:00
Pascal Fischer
d1f13025d1 switch back to use netbird main 2023-12-05 12:39:15 +01:00
Pascal Fischer
dc8f55f23e remove dependency cycle from prepare peer 2023-12-04 16:26:34 +01:00
Pascal Fischer
b9fc008542 extract peer preparation 2023-12-04 12:49:50 +01:00