Commit Graph

531 Commits

Author SHA1 Message Date
Tim Wilkinson 8e751dcb62
Half the OLSR maintenance traffic (#1130) 2024-03-27 17:01:00 -07:00
Tim Wilkinson 3d1faf8939
Fix DTD and WLAN ips derived from matching MACs. (#1128)
On some devices the hardware MAC for the WLAN and ETH are the
same so the 10.DTD and 10.WLAN addresses are identical. If we
detect this, bump the DTD address.
Commonly seen on TP-Link devices (but there are others)
2024-03-26 22:56:21 -07:00
Tim Wilkinson a14b897e0f
Disable reducing retry counts (#1126) 2024-03-26 16:23:50 -07:00
Tim Wilkinson ff02f129f3
Improve xlink reporting in sysinfo (#1127) 2024-03-26 16:23:32 -07:00
Tim Wilkinson 2fc76191a0
Set pkt retry to 2 (was 1) for hub nodes. (#1125)
Too many retries appears to cause network congestion issues slowing down
links with multiple hops, but reducing this to 1 then caused single links
to have poor performance. Try a rety of 2 as a better compromise.
2024-03-25 21:08:30 -07:00
Tim Wilkinson 8b6339a099
Use adaptive reload mechanism when node upgrades or reboots (#1121) 2024-03-25 19:52:27 -07:00
Tim Wilkinson 6be1091ffb
Updates to /etc/local/services no longer require reboot (#1119) 2024-03-24 23:10:42 -07:00
Tim Wilkinson 5c633f2b8e
Support CIDR (e.g. /24, /16, etc) on a xlink (#1110)
* Revert hAP AC Lite xlink support

* Support CIDR (e.g. /24, /16, etc) on a xlink
Xlink had originally been envisaged as a point-to-point connection
leaving the "how" of that to other software. However, there's a use case
where the non-AREDN radios in the xlink need to be accessed, and allocating
addresses within the xlink's address range is a good way to do that.
By supporting a a subnet on a xlink we can enable this.
2024-03-04 21:08:27 -08:00
Tim Wilkinson e8abbb5489
Revert hAP AC Lite xlink support (#1106) 2024-03-01 15:23:15 -08:00
Tim Wilkinson 6d81b4c846
Enable xlinks on hap ac lites (#1104) 2024-02-28 23:57:13 -08:00
Tim Wilkinson 4ff44c2b21
Run the wireguard watchdog script every 5 minutes (#1102)
This fixes up wireguard connections to dynamically changing IP addresses
2024-02-23 23:02:45 -08:00
Tim Wilkinson d1777c016d
Correctly escape characters in the mailto: urls (#1099) 2024-02-19 17:33:41 -08:00
Tim Wilkinson 139c5f66e5
Merge the LQM info onto the Mesh page (#1095) 2024-02-09 20:45:52 -08:00
Tim Wilkinson 62a6959378
Collapse QEMU and VMWARE hardware into two basic types (#1091) 2024-02-05 11:51:43 -08:00
Tim Wilkinson f3de5785a0
Validate network override configs (#1085)
* Validate network override configs

* Extra vlans
2024-01-30 13:25:37 -08:00
Tim Wilkinson f3d49eab64
Hide long time idle neighbors (#1082)
* Dont show neighbor we can't resolve or route to

* Hide neighbor which have been non-routable for over an hour
2024-01-23 00:13:01 -08:00
Tim Wilkinson 1c72b145f6
Support for GL.iNet E750 (#1079)
* Support for GL.iNet E750
2024-01-22 20:22:27 -08:00
Tim Wilkinson 29cc59ac9c
Support wireguard linktype (#1077) 2024-01-21 20:20:21 -08:00
Paul K3PGM 4e35b2f0c6
First draft of advanced DHCP option specification on Ports tab. (#1073)
* First draft of advanced DHCP option specification on Ports tab.

Allows the node administrator to specify additional DHCP options that
will be supplied to LAN clients in specific circumstances. This change
adds two tables to the Ports configuration tab.

The "Tags for Advanced DHCP Options" table allows the administrator to
specify DHCP tags that will be assigned to clients that identify
themselves with specific values for properties such as Vendor Class or
MAC address.

The "Advanced DHCP Options" table allows the administrator to specify
arbitrary DHCP options to send to any client, or only to clients with a
specific tag. Option numbers can be entered directly or chosen from a
list of well-known options. Option values are manually entered by the
administrator.

In-browser validation is implemented for all input fields with easily
recognizable content such as host names, MAC addresses, and port and
option numbers. Placeholders are also supplied for input fields, such as
MAC addresses with wildcard matching, that might otherwise be difficult
to describe.

Issues with the current version:
- Sending DHCP options not requested by the client is implemented using
the dhcp_option_force UCI configuration option, but does not currently
work.
- Tagging by client host name is supported by dnsmasq, but not yet by
UCI.
- DHCP option values must be entered manually by the administrator, but
are not currently validated.

* Better validation, placeholders, and hints for existing input fields.

* Remove junk accidentally inserted in comment.

* Preserve Advanced DHCP options across updates.
2024-01-21 17:25:16 -08:00
Tim Wilkinson e83af37894
Label wireguard tunnels in LQM (#1068) 2024-01-17 14:02:20 -08:00
Tim Wilkinson fb0f9a4b56
Update cursors on each lqm iteration. (#1067)
If we dont, and other apps change values in the config files, old
cursors dont see the new values.
2024-01-17 11:43:52 -08:00
Tim Wilkinson ce5521f373
Fixes for remote logging (#1060) 2024-01-11 20:51:25 -08:00
Tim Wilkinson bb83a8d1c9
More wireguard fixes (#1059)
* More wireguard fixes

* Fix monitoring bug when finding tunnel address
2024-01-10 00:02:54 -08:00
Tim Wilkinson f1567d662f
Wireguard2 - bug fixes (#1057)
* Fix _add for wireguard

* Fix LQM for wireguard
2024-01-07 21:44:21 -08:00
Tim Wilkinson e486a61cc8
Wireguard support - take 2. (#1056) 2024-01-07 16:17:52 -08:00
Tim Wilkinson 185d6e0abf
Fix host checking (#1052)
* Fix host checking

* nameserver -> nameservice
2024-01-03 00:45:49 -08:00
Tim Wilkinson 6d8528fa56
Make sure the node nodes we use for tunnels are always uppercase (#1049) 2024-01-01 17:36:18 -08:00
Tim Wilkinson b6dfba160e
Remove need for /etc/config/services file (#1045) 2023-12-27 14:39:17 -08:00
Tim Wilkinson 509d475133
Fix firewall rules. (#1041)
1. Allow wireguard tunnels in iface mesh setup (treat like vtuns)
2. Fix incorrectly setting up dtd/wifi to wan rules
2023-12-21 11:06:15 -08:00
Tim Wilkinson e5bd9bc066
Simply the watchdog by fixing various timeouts. (#1038)
Unfortunately there doesnt appear to be much flexibility in the various
hardware watchdogs on radios, so setting the watchdog > 60 seconds mostly
doesnt work. So rework the settings to allow for this and that our watchdog
tests must be frequent and quick.
2023-12-20 00:25:12 -08:00
Tim Wilkinson 2fe3904f0a
Accidenally created the wireguard devices twice (#1036) 2023-12-19 16:13:26 -08:00
Tim Wilkinson 0899ae7d02
Make watchdog easier to configure and less aggressive (#1034) 2023-12-19 12:07:47 -08:00
Tim Wilkinson bd26116e45
Improve 'wait_for_ticks' handling of system clock changes (#1035) 2023-12-19 12:07:11 -08:00
Tim Wilkinson cd4b99197a
Watchdog support, initial version. (#1030)
* Watchdog support, initial version.
The watchdog monitors three things:
1. A set of important system daemons.
2. A set of pingable ip addresses.
3. A time the node should reboot everyday.
2023-12-18 23:07:52 -08:00
Tim Wilkinson cc5c7cafd0
Make sure switching wifi modes forces a reboot. (#1027)
Because some hardware doesnt handle this well.
2023-12-17 21:14:38 -08:00
Tim Wilkinson 14494a477f
Add missing Request class to luci.http (#1026)
This was removed in the latest OpenWRT but we still use it.
Original plan was to just provide the old http (as ohttp) along
side but too many third-party apps also need this.
2023-12-17 16:20:41 -08:00
Tim Wilkinson abd0f8075a
VMWare support (#1024) 2023-12-16 21:32:25 -08:00
Tim Wilkinson 9046357955
Fix wan client no encryption mode (#1023) 2023-12-16 21:26:33 -08:00
Tim Wilkinson 2ba923eaa9
Fix tunnel counts (missing commit) (#1022) 2023-12-16 17:55:18 -08:00
Tim Wilkinson b2fb79d6de
Typo (#1019) 2023-12-13 23:56:38 -08:00
Tim Wilkinson ceb7e973bf
Fix xlink monitoring by lqm (#1018) 2023-12-13 23:34:08 -08:00
Tim Wilkinson 18e17abf97
Fix services and xlinks (#1017) 2023-12-13 22:49:28 -08:00
Tim Wilkinson b702c1cfe7
Reduce packet retries on congested nodes (#1015)
* Experimental retry management

* Limit retries
2023-12-13 15:52:44 -08:00
Tim Wilkinson 4b29cd252d
Remove fixed tunnel limits (#1014)
* Remove need to predefine max number of tunnels

* Improve wireguard device creation
2023-12-13 13:59:54 -08:00
Tim Wilkinson 99a12238c1
Fix server vtun numbering (#1013) 2023-12-12 23:57:36 -08:00
Tim Wilkinson 188719c321
Reduce tunnels in olsrd to minimum (#1012)
Had attempt to optimize restarting olsrd by putting more tunnel devices
in the config file by default. Unfortunately, olsrd can't cope with too
many and performs poorly.
2023-12-12 23:26:27 -08:00
Tim Wilkinson 4120914a60
Improve node setup (#996)
* Reworking the node-setup system - less reboots when changing configuration

* Add restart-services to advnet
2023-12-12 20:01:23 -08:00
Tim Wilkinson d697fc0bec
Inprove vlan selection in advanced networking (#1002)
Add the GLiNet B1300
2023-12-10 14:33:49 -08:00
Tim Wilkinson aae5e14655
Add azimuth, elevation and antenna information (#979)
* Support antenna selection and allow heading to be specified

* More antennas

* Heading -> Azimuth

* Ubiquiti's catalog

* Add Mikrotik builtin antennas

* Some Ubiquiti builtins

* JP Performance Antennas

* Added Altelix

* More Altelix

* More radios

* Add elevation

* Add generic omnis, sectors and dishes

* Improve selection

* Improve display for non-wireless devices

* Improve omni and builtin setup

* mode -> model typo in antennas.json

* Typos

* Fix bad gateway when saving

* Add antenna height above ground level.
Fix more bad gateways

* Update antennas.json

* More radio antennas

* More antennas
2023-12-06 12:30:23 -08:00
Tim Wilkinson 6d15dfb869
Extra bad olsr protection (#992)
* Better protection for missing olsrd files
2023-12-06 12:24:43 -08:00
Tim Wilkinson 09ed681311
Support remote syslogging (#971) 2023-12-06 12:19:18 -08:00
Tim Wilkinson 205f6e4ad8
Increase Supernode pollrate (#984)
* Bump the OLSR poll rate on supernodes
2023-12-06 12:14:17 -08:00
Tim Wilkinson 1694e3a6c7
Simplify how we measure link performance (#975)
* Simplify the way we measure link ping times

* Dont ping non-routables
2023-12-06 12:11:11 -08:00
Tim Wilkinson 927bdd1c8f
dd-wrt ubiquiti firmware (#973)
* Enable dd-wrt firmware for Ubiquiti devices

* Dont include the wifi monitoring interface by default
We dont use it for anything

* Remove package which clashes with new firmware

* Disable chatty warning message

* Missed patch
2023-12-06 11:59:47 -08:00
Tim Wilkinson bf3aa67f78
Wireguard tunnel support (#968)
* Wireguard tunnel support

* Fix wireguard firewall rules

* Add Wireguard tunnels to LQM

* Filter vlans on main bridge

* If you paste a tunnel config into any field, it will auto-populate all fields correctly

* Fix bad password keyword

* Fix bad feeds change

* Fix bad merge
2023-12-06 11:39:23 -08:00
Tim Wilkinson 475f371bb8
Initial OpenWRT 23.05.0 merge (#963)
* Initial OpenWRT 23.05.0 merge

* Fix get_rfchannels for new iwinfo format

* Fix initial wlan name

* Move patches to 5.15 from 5.10

* Fix flash write problem on Ubiquiti devices

* Use new ssl patch

* Reduce binary sizes

* Have to have hostapd installed now, even on tiny builds

* Simplify device support

* Revert Mikrotik NAND sysupgrade system.
OpenWRT doesnt really support Mikrotik NAND devices after 2019 and the
new support appeared broken. So reverted to the 2022 mechanism which does
work and avoid upgrade problems.

* Fixes for tiny builds

* More tiny shrinking

* Fix newly added firewall rules

* Update permanent packages

* Update permanent packages

* Support for Nanobeam 2AC (2.4GHz) device. 20MHz channels only.

* Update support

* Add GL.iNet B1300

* Add to radios.json

* Update supported devices

* Dont force the LAN DHCP to run

* Revert CURL SSL test

* Fix radio count when there are no radios

* Switch the lan ports on the gl-b1300

* Add support for GL.iNET Beryl MT1300

* Fix visual lat/lon setting bug

* Make the setup "Save Changes" button also save the location data

* Fix location/map system with geo location fallback

* Recolor

* Fix default bandwidth selection

* Support multi-band radios

* Generic mechanism to set compat version to 1.1

* Switch ethernet ports

* 20 MHz channels only

* Update docs

* Add ham channels to Mediatek chips (20MHz only)

* Automatically update the permpkg list when we upgrade

* Fix 10MHz mode for Ubiquiti AC devices

* Fix tiny builds

* Bump the watch timeout for restarting olsrd
olsrd is reliable these days, and very occasionally this
was restarting it unnecessarily
2023-12-06 10:12:11 -08:00
Tim Wilkinson cdeb1b1d44
Improve dual radio customization support (#961) 2023-10-13 22:38:05 -07:00
Tim Wilkinson 63788ec9b1
Move cron.boot earlier (#955) 2023-10-07 10:52:54 -07:00
Steve 2d9914cb35
change pollrate default to one hour (#954) 2023-10-05 13:38:05 -07:00
Tim Wilkinson 880a4f195a
Improve the way we HUP dnsmasq (#953) 2023-09-29 20:09:53 -07:00
Brett T. Warden a2e9e3054c
Remove vestigial getServicesBy* methods (#952)
* Remove vestigial getServicesBy* methods

getServicesByNode is only a dummy method.
getServicesByService doesn't even exist.

Remove the last remaining references to them from cgi-bin/api, and remove the last traces of getServicesByNode from aredn/olsr.lua

Fixes #948
Fixes #949

* Bump API version

Breaking change, removing parameters services=bynode,byservice
2023-09-29 20:09:16 -07:00
Tim Wilkinson 48ee7595ce
Read supernode status from /etc/config.mesh (#946)
Avoids running this twice after initial supernode change
2023-09-26 20:11:48 -07:00
Tim Wilkinson da8520e202
Supernode improvements (#945)
* Supernode tunnels are always "perfect"

* Move Super Mesh button onto mesh page
2023-09-24 20:40:28 -07:00
Tim Wilkinson 57e0d045e9
Supernode fixes (#944)
* Subdomain check too slow for realtime
 so now do it in the namecheck service instead.
* Dont commit to VPN address until we set the DNS name
 helps supernode setup
2023-09-21 20:13:38 -07:00
Tim Wilkinson a494a8c374
Supernode support (#938)
* Supernode option

* Change supernode 10/8 route injection.
Identify supernode in sysinfo.json

* Supernode tunnels use port 5526

* Advertise supernode-ness

* Update DNS if supernodes are available

* Open up supernodes DNS service to incoming mesh requests

* Simply nameserver update

* Support supernodes on hap ac2

* Improve supernode nameserver update reliability

* Rework how supernode nameservers are managed

* Improve supernode dns advertising

* Add super mesh button

* User supernode name not ip in advert

* Less intustive way to identify supernode dns

* Add supernode ignore options
Change supernode enabled -> enable

* Improve DNS updates

* Remove tunnels when switching to/from supernode mode

* Blackhole any unknown routes on the supernode to avoid recursing packets

* Add explicit reverse lookup rule for supernode when available

* Just use dnsmasq changes for both forward and reverse names

* Improve supernode detection
So it doesnt keep writing to flash

* Add reverse tunnel ip lookup to supernode

* enabled => enable

* Supernode tunnels start 172.30

* Remove supernode switch

* Simplify supernode check

* Fix nav test
2023-09-19 20:06:09 -07:00
Tim Wilkinson eab36f4788
Fixes for subdns (#939)
* Fix display of service names so they support subdomains

* Add dnsmasq data to support dump

* Duplicate

* Check urls using FQDN as some targets care
2023-09-19 20:04:38 -07:00
Tim Wilkinson f6ffa4acb2
Fix dnsmasq directive (#936) 2023-09-18 17:03:34 -07:00
Tim Wilkinson 11f7fe6731
Support wildcard DNS subdomains (#935)
* Support DNS sub-domains

* Support wildcard domains
2023-09-18 16:47:48 -07:00
Tim Wilkinson 9b4d873778
Lqm neighbor improvements (#933)
* Improve detection of valid neighbors via the arp cache.
Was incorrectly excluding some.

* Fixes
2023-09-17 23:12:33 -07:00
Tim Wilkinson 91ab73fe6f
Auto reinstall package improvements (#932)
* Add network detection and retry

* Add message when package reinstall is happening

* Update permenant package list
2023-09-16 18:09:18 -07:00
Tim Wilkinson 1708c4926c
Remember and reinstall packages are firmware upgrade (#930) 2023-09-15 21:16:27 -07:00
Tim Wilkinson 000b40b362
Xlink broadcast (#926)
* Support empty peer (so broadcast on vlan)

* Detect and monitor peerless (broadcast) xlinks
2023-09-04 22:37:59 -07:00
Steve 8ce7c0b27d
fix local message refresh (#908) 2023-08-14 22:53:38 -07:00
Gerard Hickey f4321ff19b
Added support for group alert messages (#890)
* Added support for group alert messages

Signed-off-by: Gerard Hickey <hickey@kinetic-compute.com>

* Fixed category for AAM group names setting

Signed-off-by: Gerard Hickey <hickey@kinetic-compute.com>

* Revised aredn_message.sh to handle group messages better

Signed-off-by: Gerard Hickey <hickey@kinetic-compute.com>

---------

Signed-off-by: Gerard Hickey <hickey@kinetic-compute.com>
2023-07-08 22:09:02 -07:00
Tim Wilkinson be9957183c
Lowercase the keys in radios.json (#895) 2023-07-08 22:04:23 -07:00
Tim Wilkinson bc0bd27bdd
RC: Day 1 fixes (#885)
* Dont compress the admin page so we handle upload timeouts more clearly

* Fix aredn.info.getFreq() so it always takes a radio and not an interface
2023-06-28 23:47:25 -07:00
Tim Wilkinson 0532afdbbf
Fix Mikrotik first install where the radios are not necessarily available. (#882) 2023-06-25 21:10:07 -05:00
Tim Wilkinson 056b60bb4d
Use wifi assoc list when looking for unresponsive nodes. (#881)
The arp cache keeps wifi entries long past them being associated with
the node, so now use wifi assoc list to find nodes, and the arp cache
to get their IPs.
2023-06-24 23:37:48 -07:00
Tim Wilkinson 426abfacfd
Fix MTU failure which broken node-setup (#878) 2023-06-22 19:17:43 -05:00
Tim Wilkinson 15c78a4369
Allow MTU on wifi interface to be modified. (#877) 2023-06-21 23:07:21 -05:00
Tim Wilkinson 270d7fd5f1
Typo (#876) 2023-06-21 13:57:21 -07:00
Tim Wilkinson 7650b627e8
Minor wifi monitor improvements for better metrics reporting (#875) 2023-06-20 20:51:18 -07:00
Tim Wilkinson 8c4d9edd99
Merge all the station monitoring and mitigation into a single service. (#874)
This is an attempt to unify all the station monitoring and make it work
better as one. We're trying to square a circle here somewhat, with taking
steps to kick nodes when problems are detected, but not kick them too quickly
or often in case we're mis-identifing issues.
We've seen these issue manifest themselves which nodes messing VoIP services
as well as resets causing nodes to get into unrecoverable states when there
was no real problems in the first place.
This will probably need to evolve before the next release, but would be good
to get some milage on the new code.
2023-06-20 01:27:23 -07:00
Tim Wilkinson 52c7286a4c
Remove another coverage test which causes problems. (#871)
Coverage is handled by modifying firmware state, and the driver stores
the values the first time it is set. When we reset this state might be lost
so it will be reloaded from the firmware. We set the coverage back to 0
so the reloaded value will be the default again.
We also remove a check which can fail incorrectly.
2023-06-12 23:29:38 -07:00
Tim Wilkinson 8f6e943237
Avoid fatal error if mac disappears across a radio reset (#868) 2023-06-08 21:27:37 -07:00
Tim Wilkinson b64aa0c988
Monitor bug fixes (#867) 2023-06-07 22:42:42 -07:00
Tim Wilkinson da7b894c39
Support xlinks on x86 (#865) 2023-06-06 00:38:45 -07:00
Tim Wilkinson 26742bbd83
Fix 'has_wifi' detection. (#863)
/sys/kernel/debug/ieee80211 can exist without entries sometimes
2023-06-04 17:24:28 -07:00
Tim Wilkinson 935dc2c063 Handle non-wifi devices passed to maxpower/pwroffset functions 2023-06-03 15:45:00 -07:00
Tim Wilkinson 60a2627989
More multi-radio support (#860)
* Multi-radio: Support different powers for different radios
* Use arrays for powers
* Update APIs to take wifi interface
2023-06-02 18:47:34 -07:00
Tim Wilkinson a61dfcdafe
Alternate ath9k and ath10k radio reset for deaf nodes (#857)
* A scan, especially if we have to do both active and passive, essentially mutes
the radio to AREDN traffic for 10-20 seconds, which isn't good. If the radio is completely
deaf then it doesn't matter, but particularly on the 9K radios we do this when
things are looking a bit dodgy, though not deaf. 
* Provide hook to reset ath9k from userspace.  This hook is attributed to:
Linus Lüssing <ll@simonwunderlich.de>
* User /sys reset hooks rather than iw scan
2023-06-01 17:06:39 -07:00
Tim Wilkinson 4e621baf0b
Support switching mesh radio on multi-radio devices (#847) 2023-05-25 21:27:59 -07:00
Tim Wilkinson f9b032aca1
Advanced networking tab (#834)
* Advanced networking tab

* Add page protection

* Disable WAN VLAN option in advanced config when advanced networking available
2023-05-16 21:29:20 -05:00
Tim Wilkinson 3863207c5a
Virtualized X86 support (#807) - 4/28/2023
* x86 configs

* Update for new update system

* Build support

* Handle nowifi on status page
2023-04-28 11:01:58 -07:00
Tim Wilkinson deeacc2cc2
Restructure, modularize and tidy the navigation buttons and menus (#805)
* Make admin and user bar menus pluggable

* Realign header block to stop is moving around

* Remove ref

* Use modular nav to disable ineligable options during initial install

* Dont offer tunnel menus options when no tunnel daemon installed.
This is for low-memory devices

* Simplify

* Improve messaging when running ram image

* Disable rather than hide vpn menu items on tiny memory devices

* Move menu navs
2023-04-25 20:07:19 -07:00
Tim Wilkinson be969b1e63
Fix frequency range reporting and display for 900MHz devices (#803) 2023-04-23 20:00:53 -05:00
Tim Wilkinson 8711afa9ca
Remove hardwired frequency tables and use information from the hardware (#801)
* Remove hard coded channel tables
* Reduce radios.json to only what's needed
* Update radios
* Improve unsupported device handling
2023-04-22 03:24:20 -10:00
Tim Wilkinson e5a0b43480 Fix occasional nil error 2023-04-11 00:38:35 -07:00
Tim Wilkinson 922949abc0
Eliminate false network rejoins using LQM information (#781)
* Use LQM information to filter out neighbors we dont care about.
These can cause false rejoin events and degrade the network.
* Only use active station monitor with LQM info.
2023-04-10 10:21:30 -07:00
Tim Wilkinson 211006b47c
Resolve unresponsive node problems with Mikrotik AC devices. (#776)
* Resolve unresponsive node problems with Mikrotik AC devices.
Mikrotik AC devices get into a state where they wont communicate with
non-AC devices .. sometimes. Leaving and rejoinging the network resets
everything. We monitor for this situation and rejoin the network when detected
to resolve the issue.
* Make reporting less chatty
2023-04-02 01:29:46 -07:00