915   /* send an RTS for this packet. */

   915   /* send an RTS for this packet. */

   916   WifiMacHeader rts;

   916   WifiMacHeader rts;

   917   rts.SetType (WIFI_MAC_CTL_RTS);

   917   rts.SetType (WIFI_MAC_CTL_RTS);

   918   rts.SetDsNotFrom ();

   918   rts.SetDsNotFrom ();

   919   rts.SetDsNotTo ();

   919   rts.SetDsNotTo ();

   920   rts.SetNoMoreFragments ();

   921   rts.SetNoMoreFragments ();

   921   rts.SetAddr1 (m_currentHdr.GetAddr1 ());

   922   rts.SetAddr1 (m_currentHdr.GetAddr1 ());

   922   rts.SetAddr2 (m_self);

   923   rts.SetAddr2 (m_self);

   923   WifiMode rtsTxMode = GetRtsTxMode (m_currentPacket, &m_currentHdr);

   924   WifiMode rtsTxMode = GetRtsTxMode (m_currentPacket, &m_currentHdr);

   924   Time duration = Seconds (0);

   925   Time duration = Seconds (0);

  1062   WifiMacHeader cts;

  1063   WifiMacHeader cts;

  1063   cts.SetType (WIFI_MAC_CTL_CTS);

  1064   cts.SetType (WIFI_MAC_CTL_CTS);

  1064   cts.SetDsNotFrom ();

  1065   cts.SetDsNotFrom ();

  1065   cts.SetDsNotTo ();

  1066   cts.SetDsNotTo ();

  1066   cts.SetNoMoreFragments ();

  1067   cts.SetNoMoreFragments ();

  1067   cts.SetAddr1 (source);

  1069   cts.SetAddr1 (source);

  1068   duration -= GetCtsDuration (source, rtsTxMode);

  1070   duration -= GetCtsDuration (source, rtsTxMode);

  1069   duration -= GetSifs ();

  1071   duration -= GetSifs ();

  1070   NS_ASSERT (duration >= MicroSeconds (0));

  1072   NS_ASSERT (duration >= MicroSeconds (0));

  1071   cts.SetDuration (duration);

  1073   cts.SetDuration (duration);