cfg80211

• allow advertising the supported interface type combinations, e.g. as

  /*
   * Each of this struct denotes a combination, e.g.
   * 1 AP + 1 STA. "Pseudo-combinations" containing
   * just a single interface type of count 1 should
   * not be listed as they are implied by supporting
   * a certain interface type.
   */
  struct interface_combination {
          u16 number[NL80211_IFTYPE_NUM];
  };
  
  struct interface_combinations {
          struct interface_combination *combinations;
          int n_combinations;
  };
  
  struct wiphy {
          ...
          struct interface_combinations combinations
  };

  and then of course export this information via nl80211

• Implement new regulatory interpretation rules as discussed in this thread. In summary, using the notation outlined for mathematical intervals:

   0) for all 1 <= k < n : MAX_k <= MIN_{k+1}
  
   1) each rule in the regdomain covers the frequency range (MIN_1, MAX_1]
  
   2) given C = union (over all k = 1 .. n) of (MIN_k, MAX_k] it must be
     true that (CENTER - BW/2, CENTER + BW/2) is a subset of C
  
   3) it must be true for all 1 <= k <= n:
         if CENTER in (MIN_k, MAX_k] : BW <= BW_k   
  
   4) This is easier to formulate algorithmically:
     USE_FLAGS = 0
     for k = 1 .. n
         if (CENTER - BW/2, CENTER + BW/2) intersects (MIN_k, MAX_k]:
             USE_FLAGS |= FLAGS_k

mac80211

AP support

• fix the PS filtering code, need to think about how to re-enable it
• reply with nullfunc to PS-poll when nothing is buffered?
• injected frames need to be tied to another virtual interface to get the software sequence number and keys (only relevant for 11w) right
• internal bridge setting (separated STAs in the BSS)
• Radar detection (AP DFS or 802.11h)

Issues

• Need to stop TX/RX when a radar is detected for the duration of scan for a new channel.

power saving

• u-APSD support. Intel has old AP u-APSD patches but there's no AP support in iwlwifi now

• 11v support (eventually)

Roaming

• mac80211 drivers use userspace (wpa_supplicant) for roaming (in wpa_supplicant specify ap_scan=1)
• better roaming without needing to poll the BSS information needs signal strength triggers so userspace can react to changing conditions
• need to export roaming capabilities of device (mac80211 has none, but fullmac cards might be able to autonomously select the best BSS) so that we don't need to configure wpa_supplicant and it can do the right thing automatically

• maybe look at deucescan: http://www.csie.ntpu.edu.tw/~yschen/mypapers/IEEE-TVT-2007-1.pdf for wpa_supplicant bg scan algorithm

Wishlist

• keep track of stations per virtual interface, required for p2p/AP interop (WIP)

Janitorial

• remove struct ieee80211_if_init_conf and pass the vif pointer instead (after the patch that puts the address into the vif)

drivers

• convert drivers to cfg80211

wireless.kernel.org site

• fix CSS colours, for example link colours (if you want to start, look at the files in http:/moin/linuxwireless/css/ and send diffs to <johannes AT sipsolutions DOT net>)

• fix print view to include a black&white logo

• the whole testing thing...
  • q/a procedure for stack
  • winlab
  • info on test coverage
  • tests itself need to be documented
  • instructions how to run tests