개요

• 솔라나라에 설명된 어플리케이션에 대해 맨 페이지를 찾아 출력한다.
• MAN 페이지에 대한 설명은 윈디하나의 솔라나라: MAN 페이지을 참고하자.
• svcadm(8)을 검색하려면 섹션에서 8 을 선택하고, 맨 페이지 이름에 svcadm을 입력하고 검색을 누른다.

ieee80211_bmiss(9)

IEEE80211_BMISS(9)       BSD Kernel Developer's Manual      IEEE80211_BMISS(9)

NAME
     ieee80211_bmiss — 802.11 beacon miss support

SYNOPSIS
     #include <net80211/ieee80211_var.h>

     void
     ieee80211_beacon_miss(struct ieee80211com *);

DESCRIPTION
     The net80211 software layer provides a support framework for drivers that
     includes handling beacon miss events in station mode.  Drivers can dis‐
     patch beacon miss events that are recognized in hardware or net80211 can
     detect beacon miss if the driver dispatches received beacon frames
     through the normal receive path.  Software beacon miss support is espe‐
     cially useful when multiple vaps are operating and any hardware beacon
     miss support is not available (e.g. operating as an access point together
     with one or more station mode vaps).

     Drivers should dispatch beacon miss events recognized in the driver with
     ieee80211_beacon_miss().  This causes some number of ProbeRequest frames
     to be sent to the access point to check if the association is still
     alive.  If no response is received and roaming mode is set to
     IEEE80211_ROAMING_AUTO then net80211 will try to re-associate and if that
     fails trigger a scan to look for the access point or another suitable AP.
     When the net80211 state machine is being operated manually, e.g. by
     wpa_supplicant(8), then applications are notified of the state change and
     are responsible for handling the work of scanning for a new access point.
     The number of beacon miss events (without a ProbeResponse) is user set‐
     table with the IEEE80211_IOC_BMISSTHRESHOLD request.

     Software beacon miss detection is enabled per-vap by setting the
     IEEE80211_FEXT_SWBMISS flag.  Typically this is done when a vap is setup
     when the IEEE80211_CLONE_NOBEACONS option is supplied to the clone opera‐
     tion.  But drivers may also force this when they know they need help
     detecting beacon miss.  When beacon miss is detected in software the
     event is dispatched without driver involvement.  Note that software bea‐
     con miss handling is not limited to station mode; it can be used in any
     operating mode where beacons from a peer station are received.

SEE ALSO
     wpa_supplicant(8), ieee80211(9), ieee80211_vap(9)

BSD                             August 4, 2009                             BSD