1. 12 May, 2010 1 commit
  2. 07 May, 2010 2 commits
    • Johannes Berg's avatar
      mac80211: improve HT channel handling · 0aaffa9b
      Johannes Berg authored
      Currently, when one interface switches HT mode,
      all others will follow along. This is clearly
      undesirable, since the new one might switch to
      no-HT while another one is operating in HT.
      
      Address this issue by keeping track of the HT
      mode per interface, and allowing only changes
      that are compatible, i.e. switching into HT40+
      is not possible when another interface is in
      HT40-, in that case the second one needs to
      fall back to HT20.
      
      Also, to allow drivers to know what's going on,
      store the per-interface HT mode (channel type)
      in the virtual interface's bss_conf.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      0aaffa9b
    • Reinette Chatre's avatar
      mac80211: remove association work when processing deauth request · 79733a86
      Reinette Chatre authored
      In https://bugzilla.kernel.org/show_bug.cgi?id=15794 a user encountered the
      following:
      
      [18967.469098] wlan0: authenticated
      [18967.472527] wlan0: associate with 00:1c:10:b8:e3:ea (try 1)
      [18967.472585] wlan0: deauthenticating from 00:1c:10:b8:e3:ea by local choice (reason=3)
      [18967.672057] wlan0: associate with 00:1c:10:b8:e3:ea (try 2)
      [18967.872357] wlan0: associate with 00:1c:10:b8:e3:ea (try 3)
      [18968.072960] wlan0: association with 00:1c:10:b8:e3:ea timed out
      [18968.076890] ------------[ cut here ]------------
      [18968.076898] WARNING: at net/wireless/mlme.c:341 cfg80211_send_assoc_timeout+0xa8/0x140()
      [18968.076900] Hardware name: GX628
      [18968.076924] Pid: 1408, comm: phy0 Not tainted 2.6.34-rc4-00082-g250541fc-dirty #3
      [18968.076926] Call Trace:
      [18968.076931]  [<ffffffff8103459e>] ?  warn_slowpath_common+0x6e/0xb0
      [18968.076934]  [<ffffffff8157c2d8>] ?  cfg80211_send_assoc_timeout+0xa8/0x140
      [18968.076937]  [<ffffffff8103ff8b>] ? mod_timer+0x10b/0x180
      [18968.076940]  [<ffffffff8158f0fc>] ?  ieee80211_assoc_done+0xbc/0xc0
      [18968.076943]  [<ffffffff81590d53>] ?  ieee80211_work_work+0x553/0x11c0
      [18968.076945]  [<ffffffff8102d931>] ? finish_task_switch+0x41/0xb0
      [18968.076948]  [<ffffffff81590800>] ?  ieee80211_work_work+0x0/0x11c0
      [18968.076951]  [<ffffffff810476fb>] ? worker_thread+0x13b/0x210
      [18968.076954]  [<ffffffff8104b6b0>] ?  autoremove_wake_function+0x0/0x30
      [18968.076956]  [<ffffffff810475c0>] ? worker_thread+0x0/0x210
      [18968.076959]  [<ffffffff8104b21e>] ? kthread+0x8e/0xa0
      [18968.076962]  [<ffffffff810031f4>] ?  kernel_thread_helper+0x4/0x10
      [18968.076964]  [<ffffffff8104b190>] ? kthread+0x0/0xa0
      [18968.076966]  [<ffffffff810031f0>] ?  kernel_thread_helper+0x0/0x10
      [18968.076968] ---[ end trace 8aa6265f4b1adfe0 ]---
      
      As explained by Johannes Berg <johannes@sipsolutions.net>:
      
      We authenticate successfully, and then userspace requests association.
      Then we start that process, but the AP doesn't respond. While we're
      still waiting for an AP response, userspace asks for a deauth. We do
      the deauth, but don't abort the association work. Then once the
      association work times out we tell cfg80211, but it no longer wants
      to know since for all it is concerned we accepted the deauth that
      also kills the association attempt.
      
      Fix this by, upon receipt of deauth request, removing the association work
      and continuing to send the deauth.
      
      Unfortunately the user reporting the issue is not able to reproduce this
      problem anymore and cannot verify this fix. This seems like a well understood
      issue though and I thus present the patch.
      Bug-identified-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      79733a86
  3. 27 Apr, 2010 1 commit
  4. 20 Apr, 2010 1 commit
  5. 19 Apr, 2010 1 commit
    • Reinette Chatre's avatar
      mac80211: pass HT changes to driver when off channel · fe6f212c
      Reinette Chatre authored
      Since "mac80211: make off-channel work generic" drivers have not been
      notified of configuration changes after association or authentication. This
      caused more dependence on current state to ensure driver will be notified
      when configuration changes occur. One such problem arises if off-channel is
      in progress when HT information changes. Since HT is only enabled on the
      "oper_channel" the driver will never be notified of this change. Usually
      the driver is notified soon after of a BSS information change
      (BSS_CHANGED_HT) ... but since the driver did not get a notification that
      this is a HT channel the new BSS information does not make sense.
      
      Fix this by also changing the off-channel information when HT is enabled
      and thus cause driver to be notified correctly.
      
      This fixes a problem in 4965 when associated with 5GHz 40MHz channel.
      Without this patch the system can associate but is unable to transfer any
      data, not even ping.
      
      See http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=2158Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      fe6f212c
  6. 08 Apr, 2010 1 commit
  7. 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
  8. 31 Mar, 2010 3 commits
  9. 24 Mar, 2010 1 commit
  10. 23 Mar, 2010 1 commit
  11. 10 Mar, 2010 1 commit
  12. 03 Mar, 2010 1 commit
    • Sujith's avatar
      mac80211: Fix HT rate control configuration · 4fa00437
      Sujith authored
      Handling HT configuration changes involved setting the channel
      with the new HT parameters and then issuing a rate_update()
      notification to the driver.
      
      This behavior changed after the off-channel changes. Now, the channel
      is not updated with the new HT params in enable_ht() - instead, it
      is now done when the scan work terminates. This results in the driver
      depending on stale information, defaulting to non-HT mode always.
      
      Fix this by passing the new channel type to the driver.
      
      Cc: stable@kernel.org
      Signed-off-by: default avatarSujith <Sujith.Manoharan@atheros.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      4fa00437
  13. 02 Mar, 2010 1 commit
    • Jouni Malinen's avatar
      mac80211: Fix reassociation processing (within ESS roaming) · 9c87ba67
      Jouni Malinen authored
      Commit e1dd33f60ced091114e4aacf141e0d03b88d3e13 changed cfg80211 to
      allow association commands while in associated state to enable support
      for roaming within an ESS. However, this was not enough to resolve all
      cases with mac80211 which needs some additional handling of the
      reassociation case to clear internal state with the BSS that was in use
      previously.
      
      This patch makes ieee80211_mgd_assoc() accept a valid reassociation
      command and clean the association state with the previous BSS. This
      fixes roaming between BSSes in an ESS when using wpa_supplicant with
      -Dnl80211.
      Signed-off-by: default avatarJouni Malinen <j@w1.fi>
      Cc: stable@kernel.org
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      9c87ba67
  14. 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
  15. 10 Feb, 2010 1 commit
  16. 09 Feb, 2010 1 commit
  17. 08 Feb, 2010 3 commits
    • Johannes Berg's avatar
      mac80211: fix deauth race · 29165e4c
      Johannes Berg authored
      When userspace requests a deauth while the
      authentication work is pending in the auth
      (not probe) state, we do not properly abort
      the work and then things get confused.
      
      Fix that and also improve the checks here
      to include the correct virtual interface,
      just in case two virtual interfaces would
      ever try to connect to the same BSS.
      
      Also fix a bug -- need to use list_del_rcu
      instead of just list_del to free a work
      item.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      29165e4c
    • Johannes Berg's avatar
      mac80211: allow station add/remove to sleep · 34e89507
      Johannes Berg authored
      Many drivers would like to sleep during station
      addition and removal, and currently have a high
      complexity there from not being able to.
      
      This introduces two new callbacks sta_add() and
      sta_remove() that drivers can implement instead
      of using sta_notify() and that can sleep, and
      the new sta_add() callback is also allowed to
      fail.
      
      The reason we didn't do this previously is that
      the IBSS code wants to insert stations from the
      RX path, which is a tasklet, so cannot sleep.
      This patch will keep the station allocation in
      that path, but moves adding the station to the
      driver out of line. Since the addition can now
      fail, we can have IBSS peer structs the driver
      rejected -- in that case we still talk to the
      station but never tell the driver about it in
      the control.sta pointer. If there will ever be
      a driver that has a low limit on the number of
      stations and that cannot talk to any stations
      that are not known to it, we need to do come up
      with a new strategy of handling larger IBSSs,
      maybe quicker expiry or rejecting peers.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      34e89507
    • Johannes Berg's avatar
      mac80211: don't probe if we have probe response · 070bb547
      Johannes Berg authored
      We can now easily determine whether we already
      have probe response information for the BSS we
      are asked to connect to, in which case there's
      little point in probing the BSS again.
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      070bb547
  18. 26 Jan, 2010 1 commit
  19. 15 Jan, 2010 1 commit
  20. 12 Jan, 2010 6 commits
  21. 08 Jan, 2010 1 commit
  22. 06 Jan, 2010 1 commit
  23. 28 Dec, 2009 8 commits