1. 15 Nov, 2010 1 commit
    • Luis R. Rodriguez's avatar
      cfg80211: fix disabling channels based on hints · ca4ffe8f
      Luis R. Rodriguez authored
      
      
      After a module loads you will have loaded the world roaming regulatory
      domain or a custom regulatory domain. Further regulatory hints are
      welcomed and should be respected unless the regulatory hint is coming
      from a country IE as the IEEE spec allows for a country IE to be a subset
      of what is allowed by the local regulatory agencies.
      
      So disable all channels that do not fit a regulatory domain sent
      from a unless the hint is from a country IE and the country IE had
      no information about the band we are currently processing.
      
      This fixes a few regulatory issues, for example for drivers that depend
      on CRDA and had no 5 GHz freqencies allowed were not properly disabling
      5 GHz at all, furthermore it also allows users to restrict devices
      further as was intended.
      
      If you recieve a country IE upon association we will also disable the
      channels that are not allowed if the country IE had at least one
      channel on the respective band we are procesing.
      
      This was the original intention behind this design but it was
      completely overlooked...
      
      Cc: David Quan <david.quan@atheros.com>
      Cc: Jouni Malinen <jouni.malinen@atheros.com>
      cc: Easwar Krishnan <easwar.krishnan@atheros.com>
      Cc: stable@kernel.org
      Signed-off-by: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      ca4ffe8f
  2. 11 Oct, 2010 1 commit
  3. 06 Oct, 2010 2 commits
  4. 05 Oct, 2010 3 commits
  5. 16 Sep, 2010 1 commit
  6. 27 Aug, 2010 1 commit
  7. 24 Aug, 2010 2 commits
  8. 24 Jun, 2010 2 commits
  9. 02 Jun, 2010 1 commit
  10. 07 May, 2010 1 commit
    • Johannes Berg's avatar
      cfg80211/mac80211: better channel handling · f444de05
      Johannes Berg authored
      
      
      Currently (all tested with hwsim) you can do stupid
      things like setting up an AP on a certain channel,
      then adding another virtual interface and making
      that associate on another channel -- this will make
      the beaconing to move channel but obviously without
      the necessary IEs data update.
      
      In order to improve this situation, first make the
      configuration APIs (cfg80211 and nl80211) aware of
      multi-channel operation -- we'll eventually need
      that in the future anyway. There's one userland API
      change and one API addition. The API change is that
      now SET_WIPHY must be called with virtual interface
      index rather than only wiphy index in order to take
      effect for that interface -- luckily all current
      users (hostapd) do that. For monitor interfaces, the
      old setting is preserved, but monitors are always
      slaved to other devices anyway so no guarantees.
      
      The second userland API change is the introduction
      of a per virtual interface SET_CHANNEL command, that
      hostapd should use going forward to make it easier
      to understand what's going on (it can automatically
      detect a kernel with this command).
      
      Other than mac80211, no existing cfg80211 drivers
      are affected by this change because they only allow
      a single virtual interface.
      
      mac80211, however, now needs to be aware that the
      channel settings are per interface now, and needs
      to disallow (for now) real multi-channel operation,
      which is another important part of this patch.
      
      One of the immediate benefits is that you can now
      start hostapd to operate on a hardware that already
      has a connection on another virtual interface, as
      long as you specify the same channel.
      
      Note that two things are left unhandled (this is an
      improvement -- not a complete fix):
      
       * different HT/no-HT modes
      
         currently you could start an HT AP and then
         connect to a non-HT network on the same channel
         which would configure the hardware for no HT;
         that can be fixed fairly easily
      
       * CSA
      
         An AP we're connected to on a virtual interface
         might indicate switching channels, and in that
         case we would follow it, regardless of how many
         other interfaces are operating; this requires
         more effort to fix but is pretty rare after all
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      f444de05
  11. 27 Apr, 2010 1 commit
  12. 07 Apr, 2010 1 commit
    • Jouni Malinen's avatar
      cfg80211: Add local-state-change-only auth/deauth/disassoc · d5cdfacb
      Jouni Malinen authored
      
      
      cfg80211 is quite strict on allowing authentication and association
      commands only in certain states. In order to meet these requirements,
      user space applications may need to clear authentication or
      association state in some cases. Currently, this can be done with
      deauth/disassoc command, but that ends up sending out Deauthentication
      or Disassociation frame unnecessarily. Add a new nl80211 attribute to
      allow this sending of the frame be skipped, but with all other
      deauth/disassoc operations being completed.
      
      Similar state change is also needed for IEEE 802.11r FT protocol in
      the FT-over-DS case which does not use Authentication frame exchange
      in a transition to another BSS. For this to work with cfg80211, an
      authentication entry needs to be created for the target BSS without
      sending out an Authentication frame. The nl80211 authentication
      command can be used for this purpose, too, with the new attribute to
      indicate that the command is only for changing local state. This
      enables wpa_supplicant to complete FT-over-DS transition successfully.
      Signed-off-by: default avatarJouni Malinen <j@w1.fi>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      d5cdfacb
  13. 24 Mar, 2010 2 commits
  14. 19 Feb, 2010 1 commit
    • Kalle Valo's avatar
      nl80211: add power save commands · ffb9eb3d
      Kalle Valo authored
      
      
      The most needed command from nl80211, which Wireless Extensions had,
      is support for power save mode. Add a simple command to make it possible
      to enable and disable power save via nl80211.
      
      I was also planning about extending the interface, for example adding the
      timeout value, but after thinking more about this I decided not to do it.
      Basically there were three reasons:
      
      Firstly, the parameters for power save are very much hardware dependent.
      Trying to find a unified interface which would work with all hardware, and
      still make sense to users, will be very difficult.
      
      Secondly, IEEE 802.11 power save implementation in Linux is still in state
      of flux. We have a long way to still to go and there is no way to predict
      what kind of implementation we will have after few years. And because we
      need to support nl80211 interface a long time, practically forever, adding
      now parameters to nl80211 might create maintenance problems later on.
      
      Third issue are the users. Power save parameters are mostly used for
      debugging, so debugfs is better, more flexible, interface for this.
      For example, wpa_supplicant currently doesn't configure anything related
      to power save mode. It's better to strive that kernel can automatically
      optimise the power save parameters, like with help of pm qos network
      and other traffic parameters.
      
      Later on, when we have better understanding of power save, we can extend
      this command with more features, if there's a need for that.
      Signed-off-by: default avatarKalle Valo <kalle.valo@nokia.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      ffb9eb3d
  15. 15 Feb, 2010 1 commit
    • Jouni Malinen's avatar
      cfg80211/mac80211: allow registering for and sending action frames · 026331c4
      Jouni Malinen authored
      
      
      This implements a new command to register for action frames
      that userspace wants to handle instead of the in-kernel
      rejection. It is then responsible for rejecting ones that
      it decided not to handle. There is no unregistration, but
      the socket can be closed for that.
      
      Frames that are not registered for will not be forwarded
      to userspace and will be rejected by the kernel, the
      cfg80211 API helps implementing that.
      
      Additionally, this patch adds a new command that allows
      doing action frame transmission from userspace. It can be
      used either to exchange action frames on the current
      operational channel (e.g., with the AP with which we are
      currently associated) or to exchange off-channel Public
      Action frames with the remain-on-channel command.
      Signed-off-by: default avatarJouni Malinen <jouni.malinen@atheros.com>
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      026331c4
  16. 12 Jan, 2010 3 commits
    • Jouni Malinen's avatar
      cfg80211: Store IEs from both Beacon and Probe Response frames · 34a6eddb
      Jouni Malinen authored
      
      
      Store information elements from Beacon and Probe Response frames in
      separate buffers to allow both sets to be made available through
      nl80211. This allows user space applications to get access to IEs from
      Beacon frames even if we have received Probe Response frames from the
      BSS. Previously, the IEs from Probe Response frames would have
      overridden the IEs from Beacon frames.
      
      This feature is of somewhat limited use since most protocols include
      the same (or extended) information in Probe Response frames. However,
      there are couple of exceptions where the IEs from Beacon frames could
      be of some use: TIM IE is only included in Beacon frames (and it would
      be needed to figure out the DTIM period used in the BSS) and at least
      some implementations of Wireless Provisioning Services seem to include
      the full IE only in Beacon frames).
      
      The new BSS attribute for scan results is added to allow both the IE
      sets to be delivered. This is done in a way that maintains the
      previously used behavior for applications that are not aware of the
      new NL80211_BSS_BEACON_IES attribute.
      Signed-off-by: default avatarJouni Malinen <j@w1.fi>
      Acked-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      34a6eddb
    • Jouni Malinen's avatar
      nl80211: New command for setting TX rate mask for rate control · 13ae75b1
      Jouni Malinen authored
      
      
      Add a new NL80211_CMD_SET_TX_BITRATE_MASK command and related
      attributes to provide support for setting TX rate mask for rate
      control. This uses the existing cfg80211 set_bitrate_mask operation
      that was previously used only with WEXT compat code (SIOCSIWRATE). The
      nl80211 command allows more generic configuration of allowed rates as
      a mask instead of fixed/max rate.
      Signed-off-by: default avatarJouni Malinen <jouni.malinen@atheros.com>
      Acked-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      13ae75b1
    • Lukáš Turek's avatar
      nl80211: Add new WIPHY attribute COVERAGE_CLASS · 81077e82
      Lukáš Turek authored
      
      
      The new attribute NL80211_ATTR_WIPHY_COVERAGE_CLASS sets IEEE 802.11
      Coverage Class, which depends on maximum distance of nodes in a
      wireless network. It's required for long distance links (more than a few
      hundred meters).
      
      The attribute is now ignored by two non-mac80211 drivers, rndis and
      iwmc3200wifi, together with WIPHY_PARAM_RETRY_SHORT and
      WIPHY_PARAM_RETRY_LONG. If it turns out to be a problem, we could split
      set_wiphy_params callback or add new capability bits.
      Signed-off-by: default avatarLukas Turek <8an@praha12.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      81077e82
  17. 28 Dec, 2009 1 commit
    • Jouni Malinen's avatar
      cfg80211: add remain-on-channel command · 9588bbd5
      Jouni Malinen authored
      
      
      Add new commands for requesting the driver to remain awake
      on a specified channel for the specified amount of time
      (and another command to cancel such an operation). This
      can be used to implement userspace-controlled off-channel
      operations, like Public Action frame exchange on another
      channel than the operation channel.
      
      The off-channel operation should behave similarly to scan,
      i.e. the local station (if associated) moves into power
      save mode to request the AP to buffer frames for it and
      then moves to the other channel to allow the off-channel
      operation to be completed. The duration parameter can be
      used to request enough time to receive a response from
      the target station.
      Signed-off-by: default avatarJouni Malinen <jouni.malinen@atheros.com>
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      9588bbd5
  18. 28 Nov, 2009 1 commit
  19. 13 Nov, 2009 3 commits
  20. 11 Nov, 2009 1 commit
  21. 07 Oct, 2009 1 commit
  22. 14 Aug, 2009 1 commit
    • Johannes Berg's avatar
      nl80211: add generation number to all dumps · f5ea9120
      Johannes Berg authored
      
      
      In order for userspace to be able to figure out whether
      it obtained a consistent snapshot of data or not when
      using netlink dumps, we need to have a generation number
      in each dump message that indicates whether the list has
      changed or not -- its value is arbitrary.
      
      This patch adds such a number to all dumps, this needs
      some mac80211 involvement to keep track of a generation
      number to start with when adding/removing mesh paths or
      stations.
      
      The wiphy and netdev lists can be fully handled within
      cfg80211, of course, but generation numbers need to be
      stored there as well.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      f5ea9120
  23. 27 Jul, 2009 1 commit
    • Johannes Berg's avatar
      cfg80211: make aware of net namespaces · 463d0183
      Johannes Berg authored
      
      
      In order to make cfg80211/nl80211 aware of network namespaces,
      we have to do the following things:
      
       * del_virtual_intf method takes an interface index rather
         than a netdev pointer - simply change this
      
       * nl80211 uses init_net a lot, it changes to use the sender's
         network namespace
      
       * scan requests use the interface index, hold a netdev pointer
         and reference instead
      
       * we want a wiphy and its associated virtual interfaces to be
         in one netns together, so
          - we need to be able to change ns for a given interface, so
            export dev_change_net_namespace()
          - for each virtual interface set the NETIF_F_NETNS_LOCAL
            flag, and clear that flag only when the wiphy changes ns,
            to disallow breaking this invariant
      
       * when a network namespace goes away, we need to reparent the
         wiphy to init_net
      
       * cfg80211 users that support creating virtual interfaces must
         create them in the wiphy's namespace, currently this affects
         only mac80211
      
      The end result is that you can now switch an entire wiphy into
      a different network namespace with the new command
      	iw phy#<idx> set netns <pid>
      and all virtual interfaces will follow (or the operation fails).
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      463d0183
  24. 24 Jul, 2009 3 commits
    • Johannes Berg's avatar
      nl80211: report BSS status · 48ab905d
      Johannes Berg authored
      
      
      When connected to a BSS, or joined to an IBSS, we'll want
      to know in userspace without using wireless extensions, so
      report the BSS status in the BSS list. Userspace can query
      the BSS list, display all the information and retrieve the
      station information as well.
      
      For example (from hwsim):
      
      $ iw dev wlan1 scan dump
      BSS 02:00:00:00:00:00 (on wlan1) -- associated
      	freq: 2462
      	beacon interval: 100
      	capability: ESS ShortSlotTime (0x0401)
      	signal: -50.00 dBm
      	SSID: j
      	Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
      	DS Paramater set: channel 11
      	ERP: <no flags>
      	Extended supported rates: 24.0 36.0 48.0 54.0
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      48ab905d
    • Johannes Berg's avatar
      cfg80211: rework key operation · fffd0934
      Johannes Berg authored
      
      
      This reworks the key operation in cfg80211, and now only
      allows, from userspace, configuring keys (via nl80211)
      after the connection has been established (in managed
      mode), the IBSS been joined (in IBSS mode), at any time
      (in AP[_VLAN] modes) or never for all the other modes.
      
      In order to do shared key authentication correctly, it
      is now possible to give a WEP key to the AUTH command.
      To configure static WEP keys, these are given to the
      CONNECT or IBSS_JOIN command directly, for a userspace
      SME it is assumed it will configure it properly after
      the connection has been established.
      
      Since mac80211 used to check the default key in IBSS
      mode to see whether or not the network is protected,
      it needs an update in that area, as well as an update
      to make use of the WEP key passed to auth() for shared
      key authentication.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      fffd0934
    • Johannes Berg's avatar
      nl80211: introduce new key attributes · b9454e83
      Johannes Berg authored
      
      
      We will soon want to nest key attributes into
      some new attribute for configuring static WEP
      keys at connect() and ibss_join() time, so we
      need nested attributes for that. However, key
      attributes right now are 'global'. This patch
      thus introduces new nested attributes for the
      key settings and functions for parsing them.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      b9454e83
  25. 10 Jul, 2009 3 commits
    • Johannes Berg's avatar
      cfg80211: let SME control reassociation vs. association · 3e5d7649
      Johannes Berg authored
      
      
      Since we don't really know that well in the kernel,
      let's let the SME control whether it wants to use
      reassociation or not, by allowing it to give the
      previous BSSID in the associate() parameters.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      3e5d7649
    • Samuel Ortiz's avatar
      cfg80211: connect/disconnect API · b23aa676
      Samuel Ortiz authored
      
      
      This patch introduces the cfg80211 connect/disconnect API.
      The goal here is to run the AUTH and ASSOC steps in one call.
      This is needed for some fullmac cards that run both steps
      directly from the target, after the host driver sends a
      connect command.
      
      Additionally, all the new crypto parameters for connect()
      are now also valid for associate() -- although associate
      requires the IEs to be used, the information can be useful
      for drivers and should be given.
      Signed-off-by: default avatarSamuel Ortiz <samuel.ortiz@intel.com>
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      b23aa676
    • Johannes Berg's avatar
      cfg80211: introduce nl80211 testmode command · aff89a9b
      Johannes Berg authored
      This introduces a new NL80211_CMD_TESTMODE for testing
      and calibration use with nl80211. There's no multiplexing
      like like iwpriv had, and the command is not available by
      default, it needs to be explicitly enabled in Kconfig and
      shouldn't be enabled in most kernels.
      
      The command requires a wiphy index or interface index to
      identify the device to operate on, and the new TESTDATA
      attribute. There also is API for sending replies to the
      command, and testmode multicast messages (on a testmode
      multicast group).
      
      I've also updated mac80211 to be able to pass through the
      command to the driver, since it itself doesn't implement
      the testmode command.
      
      Additionally, to give people an idea of how to use the
      command, I've added a little code to hwsim that makes use
      of the new command to set the powersave mode, this is
      currently done via debugfs and should remain there, and
      the testmode command only serves as an example of how to
      use this best -- with nested netlink attributes in the
      TESTDATA attribute. A hwsim testmode tool can be found at
      http://git.sipsolutions.net/hwsim.git/
      
      . This tool is BSD
      licensed so people can easily use it as a basis for their
      own internal fabrication and validation tools.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      aff89a9b
  26. 13 May, 2009 1 commit
    • Jouni Malinen's avatar
      nl80211: Add RSC configuration for new keys · faa8fdc8
      Jouni Malinen authored
      
      
      When setting a key with NL80211_CMD_NEW_KEY, we should allow the key
      sequence number (RSC) to be set in order to allow replay protection to
      work correctly for group keys. This patch documents this use for
      nl80211 and adds the couple of missing pieces in nl80211/cfg80211 and
      mac80211 to support this. In addition, WEXT SIOCSIWENCODEEXT compat
      processing in cfg80211 is extended to handle the RSC (this was already
      specified in WEXT, but just not implemented in cfg80211/mac80211).
      Signed-off-by: default avatarJouni Malinen <jouni.malinen@atheros.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      faa8fdc8