Changeset r36943 ("dnsmasq: use host-record instead of address") removed
the automatic domain expansion for config domain sections, this breaks
existing setups and alters the old behaviour in unexpected ways, therfore
restore behaviour of the current stable release.
Additionally handle fully qualified hostnames properly when setting up the
own hostrecord by stripping the local domain part form the given name
instead of unconditionally appending it, so that "example.lan" results
in "example example.lan" and not "example.lan example.lan.lan".
SVN-Revision: 38648
- clean up duplication of procd instance handling code
- using --cd *after* --config is rather pointless
- to be able to log errors properly, --syslog needs to be passed before --config
- tell procd about the generated or referenced config file instead of
the uci file. this avoids having to restart all instances if only one
of them changes.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 38632
* Various RFC compliance fixes (thanks to Hans Dedecker)
* Fix RA spam filter logic causing ipv6 connection issues
* Fix parameters -F and -P being order dependent
SVN-Revision: 38577
* Use network.interface dump call instead of individual status calls
to reduce overall netifd lookups and invokes to 1 per fw3 process.
* Allow protocol handlers to assign a firewall zone for an interface
in the data section to allow for dynamic firewall zone assignment.
SVN-Revision: 38504
* Add ubus methods for global interface status
* Add ubus function to create nested interfaces
* Add protocol update notifications and hotplug legacy calls
* Fix: key to data elements point at wrong memory area
* Add support for source-restricted routes
* Add option "delegate" to toggle prefix delegation
* Reevaluate target routes also on interface update
SVN-Revision: 38453
A similar change was recently merged in iw commit
58b46da26ab9b5ff31c7033e175351eb1301d9af
Signed-off-by: Bruno Randolf <br1@einfach.org>
SVN-Revision: 38449
There are several cases within 'luci' that attempt to access the interface
'type' from within the 'type' specific meta tables; however, 'type' is not
currently available there. Replicate the common metadata in the 'type'
specific meta tables.
Signed-off-by: Nathan Hintz <nlhintz@hotmail.com>
SVN-Revision: 38448
Possible parameters are yes, no and adaptive. See manpage for more information.
Signed-off-by: Philipp Borgers <borgers@mi.fu-berlin.de>
SVN-Revision: 38412
* Make SOL_MAX_RT configurable and default back to 120s
* Prefer servers with bigger prefixes (allows to use Comcast /60)
* Don't hang indefinitely if DHCPv6 REQUEST is not answered
Signed-off-by: Steven Barth <steven@midlink.org>
SVN-Revision: 38393
The switch driver is not used by brcm47xx any more and can be removed,
instead of this switch driver b53 is used now.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 38387
There are certain consumer devices which are outliers in protocol conformance.
An example is Samsung bluray players, which require broadcast DHCP responses
(on Ethernet only, strangely not on Wifi).
By specifying:
config host
...
option broadcast 1
this will enable the response to be sent as an Ethernet broadcast and not as
a unicast.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
SVN-Revision: 38365
- do not insert duplicate rules when setting up reflection to a zone containing multiple interfaces
- set up reflection for any protocol, not just TCP and UDP
SVN-Revision: 38361
proto_pptp_setup is responsible for loading the required modules to establish
a pptp connection to a foreign peer. The function checks whether all required
modules are already loaded, before actually loading them.
It seems that the filter being used to accomplish this, is not restrictive
enough in some cases. For instance when pptp nat helper modules are present on
a system, and already loaded before a pptp connection is enabled. Then the
search filter (possibly) returns the following for module=pptp, where actually
no matches are expected, resulting in the pptp.ko module not being loaded,
thereby failing to establish the pptp connection.
# module="pptp" ; grep "$module" /proc/modules
nf_nat_pptp 1312 0 - Live 0x86ce7000
nf_conntrack_pptp 3072 1 nf_nat_pptp, Live 0x86cb9000
nf_nat_proto_gre 784 1 nf_nat_pptp, Live 0x86cba000
nf_conntrack_proto_gre 2368 1 nf_conntrack_pptp, Live 0x86cbf000
nf_nat 9792 13 nf_nat_rtsp,nf_nat_tftp,nf_nat_sip,nf_nat_pptp,nf_nat_h323,nf_nat_proto_gre,nf_nat_amanda,nf_nat_irc,nf_nat_ftp,ipt_REDIRECT,ipt_NETMAP,ipt_MASQUERADE,iptable_nat, Live 0x86ca8000
nf_conntrack 37264 31 nf_nat_rtsp,nf_conntrack_rtsp,nf_nat_tftp,nf_conntrack_tftp,nf_nat_snmp_basic,nf_conntrack_snmp,nf_nat_sip,nf_conntrack_sip,nf_nat_pptp,nf_conntrack_pptp,nf_nat_h323,nf_conntrack_h323,nf_conntrack_proto_gre,nf_nat_amanda,nf_conntrack_amanda,nf_conntrack_broadcast,nf_nat_irc,nf_conntrack_irc,nf_nat_ftp,nf_conntrack_ftp,ipt_MASQUERADE,iptable_nat,nf_nat,xt_helper,xt_connmark,xt_connbytes,xt_conntrack,xt_CT,xt_NOTRACK,xt_state,nf_conntrack_ipv4, Live 0x86c90000
The search filter can be made more accurate/restrictive, by requiring the
occurance of the exact name of the module at the beginning of a line in
/proc/modules.
# module="pptp" ; grep "^$module " /proc/modules
pptp 13296 2 - Live 0x86e80000
Signed-off-by: Tijs Van Buggenhout <tvb@able.be>
SVN-Revision: 38358
Currently, in order to configure the authentication daemon in
8021x mode, we need to set wireless.@wifi-iface[0].encryption="wpa"
Though it works it confuses folks as 8021x is using WEP
encryption and not WPA. Therefore the terminology itself is
confusing. This change adds 8021x as a recognized string for 8021x
authentication.
Signed-off-by: Mathieu Olivari <mathieu@qca.qualcomm.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
SVN-Revision: 38339
Setting wireless.@wifi-iface[N].ext_registrar=1 will enable UPNP
advertising and add an external registrar to the interface this vif
belongs to (br-lan if the vif is included in the LAN bridge). By
enabling this we append upnp_iface=xxx to the hostapd config file.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Mathieu Olivari <mathieu@qca.qualcomm.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
SVN-Revision: 38338
Enable CONFIG_WPS2 for hostapd. This is required to support
options like Virtual Push Button in WPS.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
SVN-Revision: 38337
In 2009 OpenWrt's hostapd config added an "auth_cache" boolean
to be used to address a reported issue #12129 [0] on a forum [1].
The reported issue on the ticket is different that the one
described on the forum. The commit was r33359. This change broke
proper RSN preauthentication [2] [3] [4] expectations on hostapd's
configuration for WPA2 and this in turn disabled PMKSA caching and
Opportunistic Key Caching. This change:
* Leaves the "auth_cache" to be used only for WPA networks for those
looking to use this as a workaround to a reported issue but annotates
a warning over its usage.
* Separate "auth_cache" from WPA2 RSN preauthentication, leaving
WPA2 RSN preauthentication to enabled only with "rsn_preauth" with
the expected and recommended settings.
* Adds a new WPA2 RSN preauthentication "rsn_preauth_testing" to
be used when evaluating funcionality for WPA2 RSN preauthentication
with the expected and recommended settings with the only difference
so far with what should be enabled by default to disable Opportunistic
Key Caching.
Disabling the PMKSA cache should mean the STA could not roam off and back
onto the AP that had PMKSA caching disabled and would require a full
authentication cycle. This fixes this for WPA2 networks with
RSN preauthentication enabled.
This change should be applied to AA as well as trunk.
TL DR;
The issue described on the forum has to do with failure of a STA
being able to try to authenticate again with the AP if it failed
its first try. This may have been an issue with hostapd in 2009
but as per some tests I cannot reproduce this today on a WPA2
network.
The issue described on the ticket alludes to a security issue with the
design of using a Radius server to authenticate to an AP. The issue
vaguely alludes to the circumstances of zapping a user, deleting their
authentication credentials to log in to the network, and that if
RSN preauthentication is enabled with PMKSA caching that the user
that was zapped would still be able to authenticate.
Lets treat these as separate issues.
I cannot reproduce the first issue reported on the forums of not
being able to authenticate anymore on a WPA2 network.
The issue reported on the ticket modified WPA2 RSN preauthentication
by adding two fields to the hostapd configuration if auth_cache
was enabled:
* disable_pmksa_caching=1
* okc=0
The first one disables PMKSA authentication cache.
The second one disables Opportunistic Key Caching.
The issue reported on the ticket was fixed by implementing a workaround
in hostapd's configuration. Disabling PMKSA caching breaks proper use
of WPA2 RSN pre authentication. The usage of disable_pmksa_caching=1
prevents hostapd from adding PMKSA entries into its cache when a successful
802.1x authentication occurs. In practice RSN preauthentication would
trigger a STA to perform authentication with other APs on the same SSID,
it would then have its own supplicant PMKSA cache held. If a STA roams
between one AP to another no new authenitcation would need to be performed
as the new AP would already have authenticated the STA. The purpose of the
PMKSA cache on the AP side would be for the AP to use the same PMKID for
a STA when the STA roams off onto another BSSID and later comes back to it.
Disabling Opportunistic Key Caching could help the reported issue
as well but its not the correct place to address this. Opportunistic
Key Caching enables an AP with different interfaces to share the
PMKSA cache. Its a technical enhancement and disabling it would
be useful to let a testing suite properly test for RSN preauthentication
given that otherwise Opportunistic Key Caching would enable an
interface being tested to derive its own derive the PMKSA entry.
In production though okc=1 should be enabled to help with RSN
preauthentication.
The real fix for this particular issue outside of the scope of hostapd's
configuration and it should not be dealt with as a workaround to
its configuration and breaking expected RSN preauthentication and
technical optimizations. Revert this change and enable users to pick
and choose to enable or disable disable_pmksa_caching and okc expecting them
to instead have read clearly more what these do.
As for the core issure ported, the correct place to fix this is to
enable a sort of messaging between the RADIUS server and its peers
so that if caching for authentication is enabled that cache can be
cleared upon user credential updates. Updating a user password
(not just zapping a user) is another possible issue that would need
to be resolved here. Another part of the solution might be to reduce
the cache timing to account for any systematic limitations (RADIUS
server not able to ask peers to clear cache might be
one).
[0] https://dev.openwrt.org/changeset/33359
[1] https://forum.openwrt.org/viewtopic.php?id=19596
[2] http://wireless.kernel.org/en/users/Documentation/hostapd#IEEE_802.11i.2FRSN.2FWPA2_pre-authentication
[3] http://wireless.kernel.org/en/users/Documentation/wpa_supplicant#RSN_preauthentication
[4] http://wiki.openwrt.org/doc/recipes/rsn_preauthentication
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
SVN-Revision: 38336
This adds the eap_reauth_period to be used for modifying
the RADIUS server reauthentication authentication period,
a parameter that gets passed directly to the hostapd
configuration file.
Signed-off-by: Mathieu Olivari <mathieu@qca.qualcomm.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
SVN-Revision: 38334
Changes include:
* removing unused variables
* replacing spaces with tabs where appropriate
* more consistency with variable declarations
Signed-off-by: Luka Perkov <luka@openwrt.org>
SVN-Revision: 38142
- fixes buffer corruption with JSON-RPC list calls
- change JSON-RPC protocol to include the session ID into the call
attributes instead of passing it via the URL
- forcibly pass effective session ID as "ubus_rpc_session" attribute
to called procedures
- change ubus acl checking to conform with new ubus session namespace
SVN-Revision: 37962
hostapd supports "Dynamic Authorization Extensions", making it possible
to forcibly disconnect a user by sending it a RADIUS "Disconnect-Request"
packet.
I've added three new variables to enable setting of the
"radius_das_client" and "radius_das_port" variables in the hostapd
configuration, which enable these extensions.
* dae_client - IP of the client that can send disconnect requests
* dae_secret - shared secret for DAE packets
These are combined into the "radius_das_client" option in hostapd.conf
To enable the server, both dae_client and dae_secret must be set.
* dae_port - optional, default value is 3799 as specified in RFC 5176
Signed-off-by: Martijn van de Streek <martijn@vandestreek.net>
SVN-Revision: 37734
WEP in WDS is currently broken in hostapd. Add a patch
to fix the issue.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
SVN-Revision: 37733
Add a patch for hostapd that introduces a config option
"start_disabled" which can be used to bring up an AP
interface with beaconing disabled. This is useful in
a Repeater-AP setup where the Repeater AP has to start
beaconing only after the WDS link has been established.
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
SVN-Revision: 37730
this patches updates openvpn to v2.3.2
and adds a PKG_MD5SUM to the Makefile
This release fixes a memory access violation when cipher none is used
on ar71xx - at least with my config
Signed-off-by: Peter Wagner <tripolar@gmx.at>
SVN-Revision: 37560
This patch modifies the uci scripts to be able to
start meshd-nl80211 for encrypted mesh networks,
therefor a new script (authsae.sh) is inserted.
Signed-off-by: Emanuel Taube <emanuel.taube@gmail.com>
[etienne.champetier@free.fr: just update mac80211.sh path]
Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>
SVN-Revision: 37554
This patch adds authsae open80211s authentication daemon (http://open80211s.org)
It's a rework of Peter Naulls patch (http://patchwork.openwrt.org/patch/1350/)
I've excluded the sample conf file as it's useless when used with mac80211.sh (Emanuel Taube patch)
It now link against libnl-tiny instead of libnl (patch merged in authsae git)
Authsae is 58 Ko (OPENSSL_WITH_EC option adds 35Ko to libopenssl)
Signed-off-by: Peter Naulls <peter@chocky.org>
Signed-off-by: Etienne CHAMPETIER <etienne.champetier@free.fr>
SVN-Revision: 37553
The reap functionality appears to have been accidentally disabled by
commit 74ded7257e5da5e309844d386290f24ae91950a6 to iptables.git, see:
git://git.netfilter.org/iptables.git
and subsequently in iptables 1.4.15 and later. This adds a patch to
restore reap functionality for recent_opts_v1.
Signed-off-by: Russell Senior <russell@personaltelco.net>
SVN-Revision: 37328
This makes it possible to use swconfig to controll the switch.
This was tested with devices using b43 and bgmac.
This was not tested on devices using tg3.
This does not support the adm switch used in some very old devices.
SVN-Revision: 37304
lldpd 0.7.1 has several alignment issues that trip a system configured
to fault on misaligned accesses. Version 0.7.5 fixes that along with a
few other minor issues.
Signed-off-by: John Szakmeister <john@szakmeister.net>
SVN-Revision: 37168
AVR32 misses a bunch of updated syscalls, including timerfd_create()
which is used by 6relayd. Since that requires Linux/libc changes, just
prevent building it for now.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 37040
this cause the wps trigegr to be copied to the wrong place
https://dev.openwrt.org/ticket/13753
Signed-off-by: John Crispin <blogic@openwrt.org>
SVN-Revision: 37031
Make hostapd.sh correctly handle the macfile uci option.
Such option specifies the macfile name to pass into the
hostapd configuration file. Moreover, if a maclist option
has been specified, copy the macfile before appending new
entries.
Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
SVN-Revision: 36944
Using "--address" for individual host A records is broken, use "--host-record" instead.
The following patch changes dnsmasq.init to build individual host records using "--host-record" instead of "--address".
Signed-off-by: Adam Gensler <openwrt at gnslr.us>
[jow: shorter description, simplified shell script code]
SVN-Revision: 36943
wpa_supplicant may send log and event messages intermixed with the
expected scan results. This makes "iwinfo wlan0 scan" and LuCI
"site survey" display nothing when many AP's are around.
Eliminate the CTRL-EVENT-BSS-ADDED events, interspersed log messages,
lines with unexpected format. Increase timeout to handle the max
number of channels (2.4, 3.6, 4.9, 5 GHz). Insure receive buffer is
null-terminated.
Signed-off-by: Jean-Pierre Tosoni <jp.tosoni@acksys.fr>
SVN-Revision: 36888
- optimizes chain usage for ingress rules
- adds limit match support for redirect rules
- fixes automatic redirect dest detection on little endian systems
- leaves base chains in place on reload to allow user rules to target e.g. "reject"
SVN-Revision: 36871
- simplifies using ipsets for rules and redirects, match direction can be specified in-place like option ipset 'setname src dst dst'
- uses zone_name_src_ACTION chains for input rules, this fixes logging with log enabled src zones
SVN-Revision: 36854
- allows building without IPv6 support
- uses more robust rules to cope with missing libext.a
- uses better linking strategy to avoid symbol clashes with older iptables
- introduces source compatiblity layer for different libxtables versions
SVN-Revision: 36736
- allows symbolic notation for src_ip, src_dip and dest_ip options, e.g. option src_ip 'lan' to automatically resolve to "192.168.1.0/24"
- automatically infer destination zone for redirects from target ip, this makes 'dest' optional and nat reflection setup more robust
- properly support output rules with dest '*' to hook directly into delegate_output
- fixes crash when processing rules with unresolved targets
SVN-Revision: 36721
- Use weak references for instantiating libext*.a matches, makes fw3 independant from the compile time features of iptables
- Do not leak memory when processing rules with unknown targets or matches
SVN-Revision: 36698
- fixes reload when firewall is not running already
- fixes crash when ipsets are supported but undeclared
- fixes handling of per zone user chains on reload
SVN-Revision: 36689
* use libiptc and libxtables directly to manage ruleset, iptables-restore is unreliable and prone to race conditions
* make ipset integration more reliable
SVN-Revision: 36681
This patch simply adds support for the "--proxy-dnssec" command in dnsmasq into the init file so it can be used with /etc/config/dhcp.
Signed-off-by: Adam Gensler <openwrt@kristenandadam.net>
SVN-Revision: 36570
Previously if the upstream router did not provide any DHCPv6-service
the wan6 interface would not come up even if RAs were received. The new
behavior allows the wan6 interface to comeup with RA-only configuration
after a timeout of 10s.
SVN-Revision: 36555
- assume "tcp+udp" if no protcol is specified in rules or redirects (#13422, #13386)
- add support for fwmark matches and mark setting targets
SVN-Revision: 36521
libiptc.pc depends on libip[4|6]tc.pc, thus all of those need to be
installed.
Should fix collectd build and thus #13146; which should make collectd
appear in snapshots again.
Signed-off-by: Danny Baumann <dannybaumann@web.de>
SVN-Revision: 36509
- support network names in per-zone 'masq_src', 'masq_dest' and 'subnet' options (#13197)
- do not allow src_mac option for SNAT rules
SVN-Revision: 36090
* Introduce "option reload" for includes to specify whether includes should be processed on reload (e.g. when tapping into internal chains)
* Allow "network" and "device" commands while firewall is running (to make them usable in includes)
SVN-Revision: 36009
* Adds support for emitting hotplug events when creating and clearing zones (fixes miniupnpd)
* Make NAT reflection direction configurable
* Map init script stop action to flush
* Map init script reload action to reload
* Respect init script disabled state in hotplug handler
SVN-Revision: 35998
* Fixes compilation against eglibc
* Fixes tracking logic when selectively restarting IPv4 or IPv6 firewall
* Fixes tracking logic for user chains by differentiating between reloads and restarts
* Introduces per-zone user chains {input,output,forwarding,prerouting,postrouting}_$zone_rule
* Supports legacy "tcpudp" protocol notation again
SVN-Revision: 35969
- all uci rules are boxed in custom chains now, so a firewall stop leaves user rules intact
- properly handle selective ipv4 or ipv6 only firewall start/stop/restart actions
- support ip ranges (e.g. option src_ip '!192.168.1.1-192.168.1.100' -> -m iprange ! --src-range 192.168.1.1-192.168.1.100')
- support time options (e.g. option weekdays 'Mon Tue Sat' -> -m time --weekdays 1,2,6')
SVN-Revision: 35738
- reduce mssfix related log spam (#10681)
- separate src and dest terminal chains (#11453, #12945)
- disable per-zone custom chains by default, they're rarely used
Additionally introduce options "device", "subnet", "extra", "extra_src" and "extra_dest"
to allow defining zones not related to uci interfaces, e.g. to match "ppp+" or any tcp
traffic to and from a specific port.
SVN-Revision: 35484
Updated to latest stable version and added an upstream patch to handle
a link failure
Signed-off-by: Oliver Smith <olipro@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
[dgolle@allnet.de: refreshed patches]
Signed-off-by: Daniel Golle <dgolle@allnet.de>
SVN-Revision: 35250
- introduce "list interface" options to specify the ifaces to listen on, takes uci- or network device name
- set the default system description to distrib @ hostname, e.g. "OpenWrt Barrier Breaker r34744 @ vbox"
- introduce "option lldp_description" to override the automatically generated description
SVN-Revision: 34970
Using variables from the outer scope unnecessarily complicates the code and
leads to issues.
This patch fixes the bug when having an "adhoc" wifi-iface section before a
"sta" section prevents wpa_supplicant from using the key specified in the
corresponding section as it tries to use the "adhoc" key instead (1 by
default).
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
SVN-Revision: 34716
This was done previously when dhcp was handled by the network scripts.
So netifd should behave the same.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
SVN-Revision: 34704
Since the switch to netifd, proto handlers may always set the defaultroute
and provide dns server addresses, netifd will decide in the generic code
path whether the announced values are masked or not.
Additionally protocol handlers should not modify the routing tables themselves
and prevent any launched services from doing so.
Remove the additional defaultroute and peerdns option handling from the ppp.sh
protocol handler and rely on netifd to mask or not mask the values.
SVN-Revision: 34536
Upstream has a few code cleanups, more eagerly burns sensitive memory and
includes the fix for CVE-2012-0920. Full changelog:
https://matt.ucc.asn.au/dropbear/CHANGES
Local changes:
- Removed PKG_MULTI which is no longer in options.h (even before 2011.54)
- Merged DO_HOST_LOOKUP into 120-openwrt_options.patch
- Removed LD from make opts (now included in TARGET_CONFIGURE_OPTS)
- Removed 400-CVE-2012-0920.patch which is included in 2012.55
Signed-off-by: Catalin Patulea <cat@vv.carleton.ca>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 34496
- use comment match to keep track of per-network rules
- setup reflection for any interface which is part of a masqueraded zone, not just "wan"
- delete per-network reflection rules if network is brought down
SVN-Revision: 34472
Previously only the first macfilter configuration would have been used
on all interfaces. However, the configuration was always done per vif
already. Hence, move the macfilter setup into hostapd.sh where and
create one mac list file per vif.
Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
SVN-Revision: 34470
In particular, it wants to run before the ntpclient script. Which may
block for a long time attempting to do DNS lookups for NTP servers. In
my case, that would have *worked* if the new device had been added to
teql first, rather than timing out.
This was effectively causing a huge delay between an interface coming
up, and routing actually starting to work.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 34442
John Crispin
Felix Fietkau
Jo-Philipp Wich
Steven Barth
Luka Perkov
Hauke Mehrtens
Gabor Juhos
Vasilis Tsiligiannis
Florian Fainelli
Jonas Gorski
Mirko Vogt