Commit Graph

1394 Commits

Author SHA1 Message Date
Matthias Schiffer
b15b008e69
gluon-core: create disabled mesh interface sections in outdoor mode
The interfaces should always exist and just be disabled when outdoor
mode is enabled. Not creating them at all leads to an issue in the
advanced wifi settings where an additional reload of the page is
necessary after enabling or disabling the ourdoor mode to make the mesh
VIF options appear or disappear.
2020-06-06 17:12:13 +02:00
Matthias Schiffer
d012d7d32f
gluon-web-wifi-config: make mesh VIF options depend on outdoor=false
Instead of relying on the existence of interface sections only (which is
still used for the case of interface types that are not configured at
all in the site config), add a proper dependency.

This fixes section visiblity with enabled outdoor mode after the following
fix, and gives the user immediate feedback (allowing to disable outdoor
mode and enable meshing in a single step).
2020-06-06 17:12:13 +02:00
Matthias Schiffer
53c33acaf9
gluon-web-wifi-config: rename and simplify filter_active_interfaces()
- Return early
- Rename to has_active_interfaces(), as it returns a boolean
2020-06-06 17:12:12 +02:00
Matthias Schiffer
600ab99f80
gluon-config-mode-outdoor, gluon-web-wifi-config: commit network config
200-wireless will add or remove the mesh network sections of
/etc/config/network. Commit this file, so the modified setting doesn't
get lost on reboot.

Fixes: #2048
2020-06-06 16:47:35 +02:00
Matthias Schiffer
45b518df11 gluon-web-model: remove unused field error message code
Validation errors are mostly handled in the frontend (by displaying
invalid fields with a red background). There was some code left in the
backend for handling different kinds of errors, and returning custom
error messages from validate(), but the resulting value was not used
anywhere.
2020-06-05 21:46:30 +02:00
Matthias Schiffer
5adbaf2907 gluon-web-model: remove dead code for section errors 2020-06-05 21:46:30 +02:00
Matthias Schiffer
e6859ca031 gluon-web-model: remove unused tag_invalid and tag_missing fields 2020-06-05 21:46:30 +02:00
Matthias Schiffer
11a3b56617 gluon-web-model: add dependency support for sections
- Add a dependency array to section template
- Lift dependency handling from AbstractValue to Node
- Split resolve_depends() into a function handling dependencies of a
  node itself (resolve_node_depends()), which now is used for all nodes,
  and the existing recursive descent through the node tree
- When any node's dependencies are not satisfied, all descendents are
  reset recursively, meaning that an option in a section that is hidden
  will always be ignored, as if the option's own dependencies were
  unsatisfied

Fixes: #1349
2020-06-04 22:54:28 +02:00
Matthias Schiffer
35950b44b7 gluon-web-model: fix passing additional variables from form template to sections
This is currently unused in our packages.
2020-06-04 22:54:28 +02:00
Matthias Schiffer
3951607e53 gluon-web-model: fix deplist() argument list
Fixes dependency tracking for individual <option> elements (currently
unused).
2020-06-04 22:54:28 +02:00
Matthias Schiffer
50adb097fa
build: make GluonSrcDiet simpler and more robust (#2033)
- If luasrcdiet fails for a Lua script, this is a bug that should be
  noticed rather than including the unminified script
- Use .tmp suffix for temporary file rather than .o
- Replace chmod + stat + mv with simpler cp + rm to overwrite file while
  preserving file mode
2020-06-04 22:53:14 +02:00
Matthias Schiffer
3fda210f85
gluon-mesh-{batman-adv,babel}: respondd: use libgluonutil to determine interface type
Also make babel match batman-adv and only emit the wireless/tunnel/other
fields when they are non-empty.

Fixes: #1783
2020-06-01 21:45:33 +02:00
Matthias Schiffer
41b3c91284
libgluonutil: introduce gluonutil_get_interface_lower() and gluonutil_get_interface_type()
gluonutil_get_interface_lower() recursively determines the lower of an
interface until the base interface is found.

gluonutil_get_interface_type() tries do distinguish wired, wireless and
tunnel interfaces. For tunnel interfaces, TUN/TAP, L2TPETH and Wireguard
are supported at the moment.
2020-06-01 21:15:47 +02:00
Matthias Schiffer
72c71d35ac
gluon-mesh-babel: clean up link-local address handling
- Rename obtain_if_addr() to get_linklocal_address()
- Pass buffer of size INET6_ADDRSTRLEN instead of the oversized NI_MAXHOST
- Check if an address is link-local before converting to a string
- Replace an incorrect use of strncmp() with strcmp()
- Return status to caller
- Streamline control flow

While we're at it, the function handle_neighbour(), which is one of the
callers of get_linklocal_address() is slightly cleaned up as well.
2020-06-01 14:50:40 +02:00
David Bauer
6a15c704cd gluon-wireless-encryption-wpa3: switch to hostapd-wolfssl
This switches hostapd variant used for SAE and OWE from hostapd-openssl
to hostapd-wolfssl.

The bug shich one broke the wolfssl implementation was resolved upstream
with commit 631c437a91c2 ("hostapd: backport wolfssl bignum fixes").
This particular commit also got backported to OpenWrt 19.07.
2020-06-01 11:24:24 +02:00
Jan-Jonas Sämann
ed094bc68c
gluon-core: firewall: Allow custom gluon_wired interfaces (#2041)
This allows for multiple mesh legs out of one box. Useful for offloaders
and networks using vlan for separate mesh transport.
Custom mesh interfaces in a VXLAN domain are otherwise firewalled.

This fixes #1479
2020-05-31 10:57:58 +02:00
David Bauer
e951ff6e21 gluon-core: add support for configuring the beacon interval
This adds support for the beacon interval to be set on a per-band base.
This has the potential to reduce the amount of airtime used up for
sending beacon frames.
2020-05-30 00:47:33 +02:00
Jan-Tarek Butt
22847e4986
gluon-reload: add missing service restarts on domain switching
[Matthias Schiffer: fix up start/stop order and file permissions]
2020-05-28 23:30:25 +02:00
Matthias Schiffer
20c7fd9881
Merge pull request #2011 from freifunk-gluon/board-json-addresses
Look up primary MAC address through board.json for LAN/WAN
2020-05-28 22:30:14 +02:00
David Bauer
b1de28bab1 gluon-core: move wireless-related utils to wireless module
Separate wireless-related helper methods from the util module to a
new wireless module. This keeps them separated, as the amount of
wireless helpers increased in the past, justifying a separate module.
2020-05-28 21:46:23 +02:00
Matthias Schiffer
fcc6877c8b gluon-core: build in xt_CT with GLUON_SPECIALIZE_KERNEL
xt_CT was added to kmod-ipt-conntrack a while back. Update our
GLUON_SPECIALIZE_KERNEL rules accordingly.

When building xt_CT into the kernel, one of the symbols IP_NF_RAW and
IP6_NF_RAW must be enabled as well, even though there is no runtime
dependency when building as modules. The kernel grows by less than 1KB
even when both IP_NF_RAW and NETFILTER_XT_TARGET_CT are enabled, making
this change a (very slight) net win in both flash and RAM usage.
2020-05-28 19:40:29 +02:00
Ruben Barkow-Kuder
891bfc77ac
gluon-client-bridge: simplify boolean expressions (#2031) 2020-05-25 01:13:30 +02:00
lemoer
14481851f6
gluon-status-page: show primary_domain 2020-05-21 18:09:08 +02:00
lemoer
b9c1a026b1
gluon-respondd: emit "primary_domain_code" in nodeinfo
Closes #1974

Situation:
==========

$ ls -l /lib/gluon/domains/lindennord.json
lrwxrwxrwx    1 root     root            10 Jan  6 03:42 /lib/gluon/domains/lindennord.json -> dom17.json

Before:
=======

$ gluon-neighbour-info -d ::1 -p 1001 -r nodeinfo -c 1
{
   "node_id": "525400123456",
   "system": {
     "domain_code": "lindennord",
     "site_code": "ffh"
   },
...
}

After:
======

$ gluon-neighbour-info -d ::1 -p 1001 -r nodeinfo -c 1
{
   "node_id": "525400123456",
   "system": {
     "primary_domain_code": "dom17",
     "domain_code": "lindennord",
     "site_code": "ffh"
   },
...
}
2020-05-21 18:09:05 +02:00
lemoer
bcf57467dd libgluonutil: implement gluonutil_get_primary_domain()
Implemented using readlink() and basename() to the selected domain in
/lib/gluon/domains/${DOMAIN}.json.
2020-05-21 18:08:36 +02:00
lemoer
0c2a52c19f
libgluonutil: fix double free of domain_code when domain is not existing 2020-05-21 18:03:58 +02:00
lemoer
57516fe4e7
Add GLUON_MINIFY flag to allow skipping the minification process (#1916) 2020-05-13 00:45:06 +02:00
Matthias Schiffer
3daacfb92e
Merge pull request #2013 from freifunk-gluon/outdoor-setup-ifname
Reuse outdoor device logic for setup mode interface selection, plus some cleanup
2020-05-12 20:39:30 +02:00
Matthias Schiffer
b842ec43ff gluon-mesh-batman-adv: do not override WAN MAC address with VXLAN
As a partial fix to #496, do not touch the MAC address of the WAN
interface when using VXLANs (as only the MAC address of the VXLAN
interface matters to batman-adv).
2020-05-12 17:02:37 +02:00
Matthias Schiffer
8807c76a34
gluon-setup-mode: remove obsolete sysconfig.config_ifname migration
config_ifname was renamed to setup_ifname in Gluon v2015.1.
2020-05-10 16:38:42 +02:00
Matthias Schiffer
e9687d7ef1
gluon-setup-mode: use is_outdoor_device() for setup_ifname selection
On PoE-powered devices, we usually want to use WAN for the setup mode.
As all outdoor devices are PoE-powered, we can reuse this function. This
switches the setup mode interface for new installations / after config
reset on a few devices that were missing in this list before.
2020-05-10 16:38:42 +02:00
Matthias Schiffer
0dd9a3e07c
gluon-core: platform: add 2.4GHz-only outdoor devices 2020-05-10 16:38:41 +02:00
Matthias Schiffer
f4fe58cfd7
gluon-core: ignore is_outdoor_device() value on devices without 5GHz radio 2020-05-10 16:38:41 +02:00
Matthias Schiffer
5ec08d841d
gluon-core: platform: clean up device_supports_mfp()
- Use util.find_phy()
- Stop foreach() as soon as the result is known
2020-05-10 16:38:41 +02:00
Matthias Schiffer
3ccf7fdd96
gluon-mesh-vpn-fastd: clean up peers and groups on update
The 'preserve' flag can be used to mark a peer so it is not removed or
modified on upgrades. In addition, groups containing preserved peers are
not removed.

Fixes: #557
2020-05-10 14:30:25 +02:00
Matthias Schiffer
b019c703c9
gluon-mesh-vpn-fastd: reduce complexity of upgrade script 2020-05-10 13:06:00 +02:00
Matthias Schiffer
e93dca7cb3
gluon-core: primary-mac: replace all eth0/eth1 lookups with lan/wan
The netdev() lookup is confusing to use: whenever a interface does not
exist during boot (for example VLAN) or when the address is overridden
from board.json (which is not obvious at all), it will yield either no
address, or a different address than expected.

To avoid this confusion, using board.json-based interface() is
preferable. This converts all uses of netdev() to the corresponding
lan/wan lookups, except for the final fallback for eth0.
2020-05-08 19:56:36 +02:00
Matthias Schiffer
02e4a13069
gluon-core: primary-mac: add fallback to netdev address to interface()
In most cases, board.json does not contain any MAC addresses; in this
case, the default MAC address of the underlying interface is to be used.
2020-05-08 19:55:41 +02:00
Matthias Schiffer
2250665d18
gluon-core: primary-mac: cleanup
- Replace misnamed, closure-returning sysfs() to a reusable read() function
- Rename eth() to netdev(), pass full interface name
- Rename board() to interface()
- Split reuable get_netdev_addr() out of netdev()
2020-05-08 19:55:40 +02:00
Matthias Schiffer
0c5b5373bb
gluon-core: primary-mac: load board.json only once 2020-05-08 19:55:40 +02:00
Matthias Schiffer
c90b400ce5
Merge pull request #2008 from ctr49/master
add hardware: Linksys EA6350 v3
2020-05-08 19:15:39 +02:00
ctr49
02a908ee2f get primary_mac from board(wan) 2020-05-06 01:12:26 +02:00
Matthias Schiffer
0e681d5c37
gluon-core: util: avoid unintended second return value from gsub()
gsub() returns the number of matches as its second return value. This
was unintendedly passed through by the util functions trim() and
node_id(). It can be presumed that this had no effect in practice, but
it can lead to surprising output when passing values to print() for
debugging.
2020-05-04 23:38:22 +02:00
ctr49
e8767bc747 define primary mac 2020-05-04 21:44:47 +02:00
Martin Weinelt
9b19883d97 add gluon-logging package
Allows reconfigurtion of remote syslog from within site.conf.

Conflicts with the gluon-web-logging package as user made changes
will be overwritten, because this package will reconfigure the syslog
destination on every upgrade.

Resolves #1845
2020-04-30 01:54:35 +02:00
Jan Luebbe
6a371d88f0 gluon-setup-mode: start urngd instead of haveged
OpenWRT 19.07 enables urngd by default, so haveged is redundant.
2020-04-30 01:51:42 +02:00
Jan Luebbe
35b4a97cce gluon-autoupdater: start/stop urngd instead of haveged
OpenWRT 19.07 enables urngd by default, so haveged is redundant.
2020-04-30 01:51:42 +02:00
Matthias Schiffer
696b4316da gluon-web-autoupdater: use human-readable names as branch labels, sort by label
Use the value of the `name` site.conf field as label (it was
accidentally unused before).

Our site.conf currently doesn't define a specific order for the branch
entries. To avoid changing branch orders, sort entries by this label.

Fixes: #1961
2020-04-26 15:31:59 +02:00
Matthias Schiffer
778bf90561
gluon-mesh-batman-adv: add UCI setting for hop penalty
Add a UCI setting gluon.mesh_batman_adv.hop_penalty

Example UCI commands:

    uci set gluon.mesh_batman_adv=mesh_batman_adv
    uci set gluon.mesh_batman_adv.hop_penalty=20
    uci commit

`/etc/config/gluon` config section:

    config mesh_batman_adv 'mesh_batman_adv'
    	option hop_penalty '20'

Fixes: #1942
2020-04-20 23:35:07 +02:00
David Bauer
c5f43add3d gluon-core: add OWE MAC-assignment
Fixes commit 6692095f9d
2020-04-11 15:14:05 +02:00
Matthias Schiffer
7b7cde7256
Merge pull request #1970 from Kasalehlia/fix-form-reset
gluon-web-model: update inputs on form reset
2020-04-09 23:17:39 +02:00
Jan Alexander
17b49e20ee ath79-generic: add support for GL.iNet GL-AR750S 2020-04-09 20:29:24 +02:00
Jan Alexander
016b323a17 gluon-status-page: set fixed layout and responsive view for data tables 2020-04-07 22:34:23 +02:00
Kasalehlia
bf090a8a83 gluon-web-model: update inputs on form reset
Register to 'reset' event on form element and make call to 'update' function
delayed in 'data-update' handler to allow the form values to update beforehand.

When using a form's 'reset' button, form field visibility was not updated.
This could lead to situations where a checkbox had to be toggled again
twice to display the detail text inputs. (Example taken from private
wifi package)
2020-04-05 12:47:49 +02:00
Martin Weinelt
3fb4cdad13 gluon-respondd: allow queries from extra_prefix6
Fixes #1959
2020-04-04 22:13:10 +02:00
David Bauer
59a4cd63b8 gluon-respondd: expose OWE clients in nodeinfo
Provide the number of OWE stations in addition to the number of all
connected wireless clients.
2020-04-01 01:15:38 +02:00
David Bauer
9720be5112 gluon-web-wifi-config: set state of OWE VAP 2020-04-01 01:15:38 +02:00
David Bauer
6692095f9d gluob-client-bridge: add support for OWE encryption 2020-04-01 01:15:38 +02:00
David Bauer
c7fa1927aa gluon-web-private-wifi: enable WPA3 configuration
This allows a user to enable WPA3-Personal and WPA2-WPA3-MM for the
private WiFi in case it is supported by the platform.
2020-03-25 02:05:18 +01:00
David Bauer
86b5104790 gluon-core: add WPA3 platorm helper
This adds a helper method, which determines if the current platform
supports WPA3 or not.

WPA3 is supported if
 - the device is not in the featureset category "tiny"
 - the WiFi driver supports 802.11w management frame protection
2020-03-25 02:05:18 +01:00
David Bauer
00e029500e features: add hostapd-mini by default
If WPA3 is not selected as a feature, autmatically include
hostapd-mini.
2020-03-25 02:05:18 +01:00
David Bauer
b057015455 gluon-wireless-encryption: add package
The gluon-wireless-encryption package selects a WPA3 supporting
hostapd package as a dependency and stores the information, which
encryption method is supported to the device.
2020-03-25 02:05:18 +01:00
Martin Weinelt
461d904086 Add gluon-mesh-wireless-sae package
This package adds support for SAE on 802.11s mesh connections.

Enabling this package will require all 802.11s mesh connections
to be encrypted using the SAE key agreement scheme. The security
of SAE relies upon the authentication through a shared secret.

In the context of public mesh networks a shared secret is an
obvious oxymoron. Still this functionality provides an improvement
over unencrypted mesh connections in that it protects against a
passive attacker who did not observe the key agreement. In addition
Management Frame Protection (802.11w) gets automatically enabled on
mesh interfaces to prevent protocol-level deauthentication attacks.

If `wifi.mesh.sae` is enabled a shared secret will automatically be
derived from the `prefix6` variable. This is as secure as it gets
for a public mesh network.

For *private* mesh networks `wifi.mesh.sae_passphrase` should be
set to your shared secret.

Fixes #1636
2020-03-23 17:06:43 +01:00
Matthias Schiffer
3bd67ab25f gluon-core: retrieve primary MAC address from board.json for Netgear DGN3500B 2020-03-14 16:26:08 +01:00
Matthias Schiffer
2e265e03c1
gluon-core: refactor primary MAC logic
Remove a lot of redundant code by switching to a match table listing
the targets and boards for each candidate for the primary MAC interface.

In addition, we add some flexiblity by allow to switch out the sysfs file
data source for the MAC address.
2020-03-12 18:52:23 +01:00
Matthias Schiffer
59d182fe54
gluon-core: gluon.platform: allow omitting target and subtarget
Allow wildcard matches on all subtargets of a target, or a full wildcard
always returning true when no arguments are passed.
2020-03-12 00:27:05 +01:00
Jan Alexander
5591d3e745 ipq40xx-generic: add support for EnGenius ENS620EXT 2020-03-09 02:15:50 +01:00
Ralf Jung
68d970e91b
gluon-mesh-vpn-tunneldigger: only search for exactly the tunneldigger binary in watchdog (#1953) 2020-03-08 13:42:25 +01:00
Steffen Förster
79ca7a7baa ramips-mt7620: add support for tp-link archer c20 v1 (#1866)
Specification:
- MediaTek MT7620A (580 Mhz)
- 64 MB of RAM
- 8 MB of FLASH
- 2T2R 2.4 GHz and 1T1R 5 GHz
- 5x 10/100 Mbps Ethernet
- 2x external, non-detachable antennas
- UART (J1) header on PCB (115200 8n1)
- 8x LED (GPIO-controlled*), 2x button, power input switch
- 1 x USB 2.0 port
2020-01-20 23:26:04 +01:00
Matthias Schiffer
d3d2204e1a
Merge pull request #1879 from freifunk-gluon/respondd-cleanup
gluon-mesh-* respondd cleanup (part 1?)
2020-01-17 21:50:32 +01:00
Dark4MD
fbb59cfd60 ramips-mt7620: add support for TP-Link Archer C20i 2020-01-10 02:37:54 +01:00
lemoer
74bdf79be0 gluon-neighbour-info: use default port 1001 and default dest ::1 2020-01-10 00:13:37 +01:00
Dark4MD
19e0f7959e ramips-mt7620: add support for TP-Link Archer C50 v1 2020-01-09 00:53:21 +01:00
Dark4MD
13f16ed737 ramips-mt7620: add support for TP-Link Archer C2 v1 2020-01-08 19:12:34 +01:00
Matthias Schiffer
8446772d07
gluon-site: add missing build depends on gluon-web/host 2019-12-23 12:02:37 +01:00
Jan-Tarek Butt
dd76e0898d
treewide: solve shellcheck warnings 2019-12-14 18:35:11 +01:00
lemoer
82082d8c62 gluon-status-page: add gateway_nexthop to statistics 2019-12-05 17:00:59 +01:00
Martin Weinelt
580b7357d5 Revert gluon-status-page gateway_nexthop changes
This reverts commits
- caf2dd037b.
- 07ebac6a49
- 55eff45f96

I accidentally pushed these commits as I had them lying around on a
dirty checkout I did testing on.
2019-12-01 16:22:34 +01:00
Martin Weinelt
a8beae5189 Merge remote-tracking branch 'lemoer/pr_status_page_gateway_nexthop' 2019-11-27 12:37:50 +01:00
Simon Terzenbach
04421f60ac ath79-generic: add support for devolo WiFi pro 1750x 2019-11-26 11:57:31 +01:00
Matthias Schiffer
ba42412527
Merge pull request #1877 from christf/respondd
gluon-mesh-babel: Fix packets leaving wrong interface
2019-11-24 13:16:19 +01:00
Christof Schulze
d5b08fe6c9 gluon-mesh-babel: depend on gluon-mmfd 2019-11-24 12:31:04 +01:00
Christof Schulze
2389679380 gluon-mesh-babel: use babel 1.9.0 feature to set pref-src on installed routes 2019-11-24 12:31:04 +01:00
Matthias Schiffer
ecc29e0b09
gluon-mesh-batman-adv: further cleanup of respondd provider
- Split into multiple files
- Avoid alloca()
2019-11-24 12:04:58 +01:00
Matthias Schiffer
0f1fa243f7
Move common code from gluon-mesh-babel and -batman-adv respondd providers to gluon-respondd
In addition this PR contains:
- split of gluon-respondd provider into multiple source files
- minor additional cleanups in gluon-mesh-babel respondd provider
  (untested, as the babel respondd provider already doesn't compile prior
  to these changes...)
2019-11-24 12:04:58 +01:00
Matthias Schiffer
f34b302b22
gluon-mesh-babel: remove explicit ubus socket specification, convert timeout to expected units 2019-11-24 12:04:58 +01:00
lemoer
55eff45f96 gluon-status-page: prettify nextnode when node is offline 2019-11-24 02:38:55 +01:00
lemoer
07ebac6a49 gluon-status-page: show gateway_nexthop and gateway in one table row 2019-11-24 02:12:47 +01:00
lemoer
caf2dd037b gluon-status-page: add gateway_nexthop to status page statistics 2019-11-24 01:19:17 +01:00
Matthias Schiffer
b4101e54e0
gluon-mesh-batman-adv: remove remaining deprecated sysfs usage
While we're at it, also slightly optimize proto_gluon_bat0_renew.
2019-11-24 01:10:59 +01:00
Matthias Schiffer
f715a58fdb
gluon-mesh-batman-adv: remove obsolete no_rebroadcast setting 2019-11-24 00:53:54 +01:00
Matthias Schiffer
abf46c5f42
gluon-mesh-babel: fix compilation of respondd provider
Adjust for changed libbabelhelper API.
2019-11-23 23:36:33 +01:00
Matthias Schiffer
4ee5f3590b
gluon-respondd: fix format string type mismatches 2019-11-23 18:56:44 +01:00
Matthias Schiffer
43b1368b70
gluon.mk: depend on luasrcdiet/host instead of luci-base/host
We don't use anything else from luci-base anymore.
2019-11-23 17:28:17 +01:00
Matthias Schiffer
23fd9cd0f9
gluon-web: import po2lmo tool from luci-base
The code is slightly cleaned up to fix compiler warnings.
2019-11-23 17:28:17 +01:00
David Bauer
3ca6abe7b1 ath79-generic: add support for OCEDO Raccoon (#1869) 2019-11-20 13:46:18 +01:00
bobcanthelpyou
4b962f24d1 treewide: update i18n files via i18n-scan.pl and msgmerge (#1784) 2019-11-09 01:25:33 +01:00
Matthias Schiffer
02c7503f74 gluon-mesh-batman-adv: remove MTU workaround for VLAN-on-WLAN
We don't support VLANs on 11s interfaces, so the workaround can be dropped
with the IBSS support.
2019-11-07 19:48:16 +01:00
Matthias Schiffer
066158a27b gluon-core: drop IBSS support 2019-11-07 19:48:16 +01:00
Matthias Schiffer
2fdb3080ce
gluon-web-wifi-config: drop IBSS enable setting 2019-11-06 22:03:51 +01:00