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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>enum mac80211_tx_control_flags</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1" /><link rel="home" href="index.html" title="The 802.11 subsystems &#8211; for kernel developers" /><link rel="up" href="bk02pt01ch04s05.html" title="functions/definitions" /><link rel="prev" href="API-enum-mac80211-rx-flags.html" title="enum mac80211_rx_flags" /><link rel="next" href="API-enum-mac80211-rate-control-flags.html" title="enum mac80211_rate_control_flags" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">enum mac80211_tx_control_flags</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-enum-mac80211-rx-flags.html">Prev</a>&#160;</td><th width="60%" align="center">functions/definitions</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-enum-mac80211-rate-control-flags.html">Next</a></td></tr></table><hr /></div><div class="refentry"><a id="API-enum-mac80211-tx-control-flags"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>enum mac80211_tx_control_flags &#8212; 
  flags to describe transmission information/status
 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="programlisting">
enum mac80211_tx_control_flags {
  IEEE80211_TX_CTL_REQ_TX_STATUS,
  IEEE80211_TX_CTL_ASSIGN_SEQ,
  IEEE80211_TX_CTL_NO_ACK,
  IEEE80211_TX_CTL_CLEAR_PS_FILT,
  IEEE80211_TX_CTL_FIRST_FRAGMENT,
  IEEE80211_TX_CTL_SEND_AFTER_DTIM,
  IEEE80211_TX_CTL_AMPDU,
  IEEE80211_TX_CTL_INJECTED,
  IEEE80211_TX_STAT_TX_FILTERED,
  IEEE80211_TX_STAT_ACK,
  IEEE80211_TX_STAT_AMPDU,
  IEEE80211_TX_STAT_AMPDU_NO_BACK,
  IEEE80211_TX_CTL_RATE_CTRL_PROBE,
  IEEE80211_TX_INTFL_OFFCHAN_TX_OK,
  IEEE80211_TX_INTFL_NEED_TXPROCESSING,
  IEEE80211_TX_INTFL_RETRIED,
  IEEE80211_TX_INTFL_DONT_ENCRYPT,
  IEEE80211_TX_CTL_NO_PS_BUFFER,
  IEEE80211_TX_CTL_MORE_FRAMES,
  IEEE80211_TX_INTFL_RETRANSMISSION,
  IEEE80211_TX_INTFL_MLME_CONN_TX,
  IEEE80211_TX_INTFL_NL80211_FRAME_TX,
  IEEE80211_TX_CTL_LDPC,
  IEEE80211_TX_CTL_STBC,
  IEEE80211_TX_CTL_TX_OFFCHAN,
  IEEE80211_TX_INTFL_TKIP_MIC_FAILURE,
  IEEE80211_TX_CTL_NO_CCK_RATE,
  IEEE80211_TX_STATUS_EOSP,
  IEEE80211_TX_CTL_USE_MINRATE,
  IEEE80211_TX_CTL_DONTFRAG,
  IEEE80211_TX_CTL_PS_RESPONSE
};  </pre></div><div class="refsect1"><a id="idm139754517819888"></a><h2>Constants</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term">IEEE80211_TX_CTL_REQ_TX_STATUS</span></dt><dd><p>
require TX status callback for this frame.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_ASSIGN_SEQ</span></dt><dd><p>
The driver has to assign a sequence
number to this frame, taking care of not overwriting the fragment
number and increasing the sequence number only when the
IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
assign sequence numbers to QoS-data frames but cannot do so correctly
for non-QoS-data and management frames because beacons need them from
that counter as well and mac80211 cannot guarantee proper sequencing.
If this flag is set, the driver should instruct the hardware to
assign a sequence number to the frame or assign one itself. Cf. IEEE
802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
beacons and always be clear for frames without a sequence number field.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_NO_ACK</span></dt><dd><p>
tell the low level not to wait for an ack
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_CLEAR_PS_FILT</span></dt><dd><p>
clear powersave filter for destination
station
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_FIRST_FRAGMENT</span></dt><dd><p>
this is a first fragment of the frame
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_SEND_AFTER_DTIM</span></dt><dd><p>
send this frame after DTIM beacon
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_AMPDU</span></dt><dd><p>
this frame should be sent as part of an A-MPDU
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_INJECTED</span></dt><dd><p>
Frame was injected, internal to mac80211.
      </p></dd><dt><span class="term">IEEE80211_TX_STAT_TX_FILTERED</span></dt><dd><p>
The frame was not transmitted
because the destination STA was in powersave mode. Note that to
avoid race conditions, the filter must be set by the hardware or
firmware upon receiving a frame that indicates that the station
went to sleep (must be done on device to filter frames already on
the queue) and may only be unset after mac80211 gives the OK for
that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above),
since only then is it guaranteed that no more frames are in the
hardware queue.
      </p></dd><dt><span class="term">IEEE80211_TX_STAT_ACK</span></dt><dd><p>
Frame was acknowledged
      </p></dd><dt><span class="term">IEEE80211_TX_STAT_AMPDU</span></dt><dd><p>
The frame was aggregated, so status
is for the whole aggregation.
      </p></dd><dt><span class="term">IEEE80211_TX_STAT_AMPDU_NO_BACK</span></dt><dd><p>
no block ack was returned,
so consider using block ack request (BAR).
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_RATE_CTRL_PROBE</span></dt><dd><p>
internal to mac80211, can be
set by rate control algorithms to indicate probe rate, will
be cleared for fragmented frames (except on the last fragment)
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_OFFCHAN_TX_OK</span></dt><dd><p>
Internal to mac80211. Used to indicate
that a frame can be transmitted while the queues are stopped for
off-channel operation.
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_NEED_TXPROCESSING</span></dt><dd><p>
completely internal to mac80211,
used to indicate that a pending frame requires TX processing before
it can be sent out.
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_RETRIED</span></dt><dd><p>
completely internal to mac80211,
used to indicate that a frame was already retried due to PS
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_DONT_ENCRYPT</span></dt><dd><p>
completely internal to mac80211,
used to indicate frame should not be encrypted
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_NO_PS_BUFFER</span></dt><dd><p>
This frame is a response to a poll
frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must
be sent although the station is in powersave mode.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_MORE_FRAMES</span></dt><dd><p>
More frames will be passed to the
transmit function after the current frame, this can be used
by drivers to kick the DMA queue only if unset or when the
queue gets full.
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_RETRANSMISSION</span></dt><dd><p>
This frame is being retransmitted
after TX status because the destination was asleep, it must not
be modified again (no seqno assignment, crypto, etc.)
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_MLME_CONN_TX</span></dt><dd><p>
This frame was transmitted by the MLME
code for connection establishment, this indicates that its status
should kick the MLME state machine.
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_NL80211_FRAME_TX</span></dt><dd><p>
Frame was requested through nl80211
MLME command (internal to mac80211 to figure out whether to send TX
status to user space)
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_LDPC</span></dt><dd><p>
tells the driver to use LDPC for this frame
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_STBC</span></dt><dd><p>
Enables Space-Time Block Coding (STBC) for this
frame and selects the maximum number of streams that it can use.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_TX_OFFCHAN</span></dt><dd><p>
Marks this packet to be transmitted on
the off-channel channel when a remain-on-channel offload is done
in hardware -- normal packets still flow and are expected to be
handled properly by the device.
      </p></dd><dt><span class="term">IEEE80211_TX_INTFL_TKIP_MIC_FAILURE</span></dt><dd><p>
Marks this packet to be used for TKIP
testing. It will be sent out with incorrect Michael MIC key to allow
TKIP countermeasures to be tested.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_NO_CCK_RATE</span></dt><dd><p>
This frame will be sent at non CCK rate.
This flag is actually used for management frame especially for P2P
frames not being sent at CCK rate in 2GHz band.
      </p></dd><dt><span class="term">IEEE80211_TX_STATUS_EOSP</span></dt><dd><p>
This packet marks the end of service period,
when its status is reported the service period ends. For frames in
an SP that mac80211 transmits, it is already set; for driver frames
the driver may set this flag. It is also used to do the same for
PS-Poll responses.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_USE_MINRATE</span></dt><dd><p>
This frame will be sent at lowest rate.
This flag is used to send nullfunc frame at minimum rate when
the nullfunc is used for connection monitoring purpose.
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_DONTFRAG</span></dt><dd><p>
Don't fragment this packet even if it
would be fragmented by size (this is optional, only used for
monitor injection).
      </p></dd><dt><span class="term">IEEE80211_TX_CTL_PS_RESPONSE</span></dt><dd><p>
This frame is a response to a poll
frame (PS-Poll or uAPSD).
      </p></dd></dl></div></div><div class="refsect1"><a id="idm139754517772704"></a><h2>Description</h2><p>
   </p><p>

   These flags are used with the <em class="parameter"><code>flags</code></em> member of <span class="structname">ieee80211_tx_info</span>.
</p></div><div class="refsect1"><a id="idm139754517770080"></a><h2>Note</h2><p>
   If you have to add new flags to the enumeration, then don't
   forget to update <code class="constant">IEEE80211_TX_TEMPORARY_FLAGS</code> when necessary.
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