1201 lines
34 KiB
C
1201 lines
34 KiB
C
/*-
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* Copyright (c) 2001 Atsushi Onoe
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* Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* IEEE 802.11 generic handler
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net/ethernet.h>
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#include <net80211/ieee80211_var.h>
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#include <net/bpf.h>
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const char *ieee80211_phymode_name[] = {
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"auto", /* IEEE80211_MODE_AUTO */
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"11a", /* IEEE80211_MODE_11A */
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"11b", /* IEEE80211_MODE_11B */
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"11g", /* IEEE80211_MODE_11G */
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"FH", /* IEEE80211_MODE_FH */
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"turboA", /* IEEE80211_MODE_TURBO_A */
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"turboG", /* IEEE80211_MODE_TURBO_G */
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"sturboA", /* IEEE80211_MODE_STURBO_A */
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"11na", /* IEEE80211_MODE_11NA */
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"11ng", /* IEEE80211_MODE_11NG */
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};
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/*
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* Default supported rates for 802.11 operation (in IEEE .5Mb units).
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*/
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#define B(r) ((r) | IEEE80211_RATE_BASIC)
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static const struct ieee80211_rateset ieee80211_rateset_11a =
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{ 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
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static const struct ieee80211_rateset ieee80211_rateset_half =
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{ 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
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static const struct ieee80211_rateset ieee80211_rateset_quarter =
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{ 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
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static const struct ieee80211_rateset ieee80211_rateset_11b =
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{ 4, { B(2), B(4), B(11), B(22) } };
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/* NB: OFDM rates are handled specially based on mode */
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static const struct ieee80211_rateset ieee80211_rateset_11g =
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{ 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
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#undef B
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static int media_status(enum ieee80211_opmode ,
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const struct ieee80211_channel *);
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/* list of all instances */
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SLIST_HEAD(ieee80211_list, ieee80211com);
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static struct ieee80211_list ieee80211_list =
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SLIST_HEAD_INITIALIZER(ieee80211_list);
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static uint8_t ieee80211_vapmap[32]; /* enough for 256 */
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static struct mtx ieee80211_vap_mtx;
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MTX_SYSINIT(ieee80211, &ieee80211_vap_mtx, "net80211 instances", MTX_DEF);
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static void
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ieee80211_add_vap(struct ieee80211com *ic)
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{
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#define N(a) (sizeof(a)/sizeof(a[0]))
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int i;
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uint8_t b;
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mtx_lock(&ieee80211_vap_mtx);
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ic->ic_vap = 0;
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for (i = 0; i < N(ieee80211_vapmap) && ieee80211_vapmap[i] == 0xff; i++)
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ic->ic_vap += NBBY;
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if (i == N(ieee80211_vapmap))
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panic("vap table full");
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for (b = ieee80211_vapmap[i]; b & 1; b >>= 1)
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ic->ic_vap++;
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setbit(ieee80211_vapmap, ic->ic_vap);
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SLIST_INSERT_HEAD(&ieee80211_list, ic, ic_next);
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mtx_unlock(&ieee80211_vap_mtx);
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#undef N
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}
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static void
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ieee80211_remove_vap(struct ieee80211com *ic)
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{
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mtx_lock(&ieee80211_vap_mtx);
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SLIST_REMOVE(&ieee80211_list, ic, ieee80211com, ic_next);
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KASSERT(ic->ic_vap < sizeof(ieee80211_vapmap)*NBBY,
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("invalid vap id %d", ic->ic_vap));
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KASSERT(isset(ieee80211_vapmap, ic->ic_vap),
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("vap id %d not allocated", ic->ic_vap));
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clrbit(ieee80211_vapmap, ic->ic_vap);
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mtx_unlock(&ieee80211_vap_mtx);
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}
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/*
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* Default reset method for use with the ioctl support. This
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* method is invoked after any state change in the 802.11
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* layer that should be propagated to the hardware but not
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* require re-initialization of the 802.11 state machine (e.g
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* rescanning for an ap). We always return ENETRESET which
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* should cause the driver to re-initialize the device. Drivers
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* can override this method to implement more optimized support.
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*/
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static int
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ieee80211_default_reset(struct ifnet *ifp)
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{
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return ENETRESET;
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}
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/*
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* Fill in 802.11 available channel set, mark
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* all available channels as active, and pick
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* a default channel if not already specified.
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*/
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static void
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ieee80211_chan_init(struct ieee80211com *ic)
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{
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#define DEFAULTRATES(m, def) do { \
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if (isset(ic->ic_modecaps, m) && ic->ic_sup_rates[m].rs_nrates == 0) \
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ic->ic_sup_rates[m] = def; \
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} while (0)
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struct ieee80211_channel *c;
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int i;
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KASSERT(0 < ic->ic_nchans && ic->ic_nchans < IEEE80211_CHAN_MAX,
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("invalid number of channels specified: %u", ic->ic_nchans));
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memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
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setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
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for (i = 0; i < ic->ic_nchans; i++) {
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c = &ic->ic_channels[i];
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KASSERT(c->ic_flags != 0, ("channel with no flags"));
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KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX,
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("channel with bogus ieee number %u", c->ic_ieee));
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setbit(ic->ic_chan_avail, c->ic_ieee);
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/*
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* Identify mode capabilities.
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*/
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if (IEEE80211_IS_CHAN_A(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
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if (IEEE80211_IS_CHAN_B(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
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if (IEEE80211_IS_CHAN_ANYG(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
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if (IEEE80211_IS_CHAN_FHSS(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
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if (IEEE80211_IS_CHAN_108A(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
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if (IEEE80211_IS_CHAN_108G(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
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if (IEEE80211_IS_CHAN_ST(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
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if (IEEE80211_IS_CHAN_HTA(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
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if (IEEE80211_IS_CHAN_HTG(c))
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setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
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}
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/* initialize candidate channels to all available */
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memcpy(ic->ic_chan_active, ic->ic_chan_avail,
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sizeof(ic->ic_chan_avail));
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ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
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ic->ic_bsschan = IEEE80211_CHAN_ANYC;
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ic->ic_prevchan = NULL;
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/* arbitrarily pick the first channel */
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ic->ic_curchan = &ic->ic_channels[0];
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/* fillin well-known rate sets if driver has not specified */
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DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
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DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
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DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
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DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
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DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
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/*
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* Set auto mode to reset active channel state and any desired channel.
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*/
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(void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
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#undef DEFAULTRATES
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}
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void
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ieee80211_ifattach(struct ieee80211com *ic)
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{
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struct ifnet *ifp = ic->ic_ifp;
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ether_ifattach(ifp, ic->ic_myaddr);
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ifp->if_output = ieee80211_output;
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bpfattach2(ifp, DLT_IEEE802_11,
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sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf);
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/* override the 802.3 setting */
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ifp->if_hdrlen = ic->ic_headroom
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+ sizeof(struct ieee80211_qosframe_addr4)
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+ IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
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+ IEEE80211_WEP_EXTIVLEN;
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/* XXX no way to recalculate on ifdetach */
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if (ALIGN(ifp->if_hdrlen) > max_linkhdr) {
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/* XXX sanity check... */
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max_linkhdr = ALIGN(ifp->if_hdrlen);
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max_hdr = max_linkhdr + max_protohdr;
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max_datalen = MHLEN - max_hdr;
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}
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/*
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* Fill in 802.11 available channel set, mark all
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* available channels as active, and pick a default
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* channel if not already specified.
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*/
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ieee80211_chan_init(ic);
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if (ic->ic_caps & IEEE80211_C_BGSCAN) /* enable if capable */
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ic->ic_flags |= IEEE80211_F_BGSCAN;
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#if 0
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/* XXX not until WME+WPA issues resolved */
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if (ic->ic_caps & IEEE80211_C_WME) /* enable if capable */
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ic->ic_flags |= IEEE80211_F_WME;
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#endif
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if (ic->ic_caps & IEEE80211_C_BURST)
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ic->ic_flags |= IEEE80211_F_BURST;
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ic->ic_flags |= IEEE80211_F_DOTH; /* XXX out of caps, just ena */
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ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
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ic->ic_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
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ic->ic_dtim_period = IEEE80211_DTIM_DEFAULT;
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IEEE80211_LOCK_INIT(ic, "ieee80211com");
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IEEE80211_BEACON_LOCK_INIT(ic, "beacon");
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ic->ic_lintval = ic->ic_bintval;
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ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
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ieee80211_crypto_attach(ic);
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ieee80211_node_attach(ic);
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ieee80211_power_attach(ic);
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ieee80211_proto_attach(ic);
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ieee80211_ht_attach(ic);
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ieee80211_scan_attach(ic);
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ieee80211_add_vap(ic);
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ieee80211_sysctl_attach(ic); /* NB: requires ic_vap */
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/*
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* Install a default reset method for the ioctl support.
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* The driver is expected to fill this in before calling us.
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*/
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if (ic->ic_reset == NULL)
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ic->ic_reset = ieee80211_default_reset;
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KASSERT(ifp->if_spare2 == NULL, ("oops, hosed"));
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ifp->if_spare2 = ic; /* XXX temp backpointer */
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}
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void
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ieee80211_ifdetach(struct ieee80211com *ic)
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{
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struct ifnet *ifp = ic->ic_ifp;
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ieee80211_remove_vap(ic);
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ieee80211_sysctl_detach(ic);
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ieee80211_scan_detach(ic);
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ieee80211_ht_detach(ic);
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/* NB: must be called before ieee80211_node_detach */
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ieee80211_proto_detach(ic);
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ieee80211_crypto_detach(ic);
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ieee80211_power_detach(ic);
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ieee80211_node_detach(ic);
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ifmedia_removeall(&ic->ic_media);
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IEEE80211_LOCK_DESTROY(ic);
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IEEE80211_BEACON_LOCK_DESTROY(ic);
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bpfdetach(ifp);
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ether_ifdetach(ifp);
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}
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static __inline int
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mapgsm(u_int freq, u_int flags)
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{
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freq *= 10;
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if (flags & IEEE80211_CHAN_QUARTER)
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freq += 5;
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else if (flags & IEEE80211_CHAN_HALF)
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freq += 10;
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else
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freq += 20;
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/* NB: there is no 907/20 wide but leave room */
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return (freq - 906*10) / 5;
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}
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static __inline int
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mappsb(u_int freq, u_int flags)
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{
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return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
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}
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/*
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* Convert MHz frequency to IEEE channel number.
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*/
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int
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ieee80211_mhz2ieee(u_int freq, u_int flags)
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{
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#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
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if (flags & IEEE80211_CHAN_GSM)
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return mapgsm(freq, flags);
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if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
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if (freq == 2484)
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return 14;
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if (freq < 2484)
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return ((int) freq - 2407) / 5;
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else
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return 15 + ((freq - 2512) / 20);
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} else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
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if (freq <= 5000) {
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/* XXX check regdomain? */
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if (IS_FREQ_IN_PSB(freq))
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return mappsb(freq, flags);
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return (freq - 4000) / 5;
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} else
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return (freq - 5000) / 5;
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} else { /* either, guess */
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if (freq == 2484)
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return 14;
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if (freq < 2484) {
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if (907 <= freq && freq <= 922)
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return mapgsm(freq, flags);
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return ((int) freq - 2407) / 5;
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}
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if (freq < 5000) {
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if (IS_FREQ_IN_PSB(freq))
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return mappsb(freq, flags);
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else if (freq > 4900)
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return (freq - 4000) / 5;
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else
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return 15 + ((freq - 2512) / 20);
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}
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return (freq - 5000) / 5;
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}
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#undef IS_FREQ_IN_PSB
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}
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/*
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* Convert channel to IEEE channel number.
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*/
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int
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ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
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{
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if (c == NULL) {
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if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
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return 0; /* XXX */
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}
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return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
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}
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/*
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* Convert IEEE channel number to MHz frequency.
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*/
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u_int
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ieee80211_ieee2mhz(u_int chan, u_int flags)
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{
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if (flags & IEEE80211_CHAN_GSM)
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return 907 + 5 * (chan / 10);
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if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
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if (chan == 14)
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return 2484;
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if (chan < 14)
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return 2407 + chan*5;
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else
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return 2512 + ((chan-15)*20);
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} else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
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if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
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chan -= 37;
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return 4940 + chan*5 + (chan % 5 ? 2 : 0);
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}
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return 5000 + (chan*5);
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} else { /* either, guess */
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/* XXX can't distinguish PSB+GSM channels */
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if (chan == 14)
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return 2484;
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if (chan < 14) /* 0-13 */
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return 2407 + chan*5;
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if (chan < 27) /* 15-26 */
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return 2512 + ((chan-15)*20);
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return 5000 + (chan*5);
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}
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}
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/*
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* Locate a channel given a frequency+flags. We cache
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* the previous lookup to optimize swithing between two
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* channels--as happens with dynamic turbo.
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*/
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struct ieee80211_channel *
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ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
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{
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struct ieee80211_channel *c;
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int i;
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flags &= IEEE80211_CHAN_ALLTURBO;
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c = ic->ic_prevchan;
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if (c != NULL && c->ic_freq == freq &&
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(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
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return c;
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/* brute force search */
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for (i = 0; i < ic->ic_nchans; i++) {
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c = &ic->ic_channels[i];
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if (c->ic_freq == freq &&
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(c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
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return c;
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}
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return NULL;
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}
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static void
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addmedia(struct ieee80211com *ic, int mode, int mword)
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{
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#define TURBO(m) ((m) | IFM_IEEE80211_TURBO)
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#define ADD(_ic, _s, _o) \
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ifmedia_add(&(_ic)->ic_media, \
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IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
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static const u_int mopts[IEEE80211_MODE_MAX] = {
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IFM_AUTO, /* IEEE80211_MODE_AUTO */
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IFM_IEEE80211_11A, /* IEEE80211_MODE_11A */
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IFM_IEEE80211_11B, /* IEEE80211_MODE_11B */
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IFM_IEEE80211_11G, /* IEEE80211_MODE_11G */
|
|
IFM_IEEE80211_FH, /* IEEE80211_MODE_FH */
|
|
TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_TURBO_A */
|
|
TURBO(IFM_IEEE80211_11G), /* IEEE80211_MODE_TURBO_G */
|
|
TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_STURBO_A */
|
|
IFM_IEEE80211_11NA, /* IEEE80211_MODE_11NA */
|
|
IFM_IEEE80211_11NG, /* IEEE80211_MODE_11NG */
|
|
};
|
|
u_int mopt;
|
|
|
|
KASSERT(mode < IEEE80211_MODE_MAX, ("bad mode %u", mode));
|
|
mopt = mopts[mode];
|
|
KASSERT(mopt != 0 || mode == IEEE80211_MODE_AUTO,
|
|
("no media mapping for mode %u", mode));
|
|
|
|
ADD(ic, mword, mopt); /* e.g. 11a auto */
|
|
if (ic->ic_caps & IEEE80211_C_IBSS)
|
|
ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC);
|
|
if (ic->ic_caps & IEEE80211_C_HOSTAP)
|
|
ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP);
|
|
if (ic->ic_caps & IEEE80211_C_AHDEMO)
|
|
ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
|
|
if (ic->ic_caps & IEEE80211_C_MONITOR)
|
|
ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR);
|
|
#undef ADD
|
|
#undef TURBO
|
|
}
|
|
|
|
/*
|
|
* Setup the media data structures according to the channel and
|
|
* rate tables. This must be called by the driver after
|
|
* ieee80211_attach and before most anything else.
|
|
*/
|
|
void
|
|
ieee80211_media_init(struct ieee80211com *ic,
|
|
ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
|
|
{
|
|
struct ifnet *ifp = ic->ic_ifp;
|
|
int i, j, mode, rate, maxrate, mword, r;
|
|
const struct ieee80211_rateset *rs;
|
|
struct ieee80211_rateset allrates;
|
|
|
|
/* NB: this works because the structure is initialized to zero */
|
|
if (LIST_EMPTY(&ic->ic_media.ifm_list)) {
|
|
/*
|
|
* Do late attach work that must wait for any subclass
|
|
* (i.e. driver) work such as overriding methods.
|
|
*/
|
|
ieee80211_node_lateattach(ic);
|
|
} else {
|
|
/*
|
|
* We are re-initializing the channel list; clear
|
|
* the existing media state as the media routines
|
|
* don't suppress duplicates.
|
|
*/
|
|
ifmedia_removeall(&ic->ic_media);
|
|
ieee80211_chan_init(ic);
|
|
}
|
|
ieee80211_power_lateattach(ic);
|
|
|
|
/*
|
|
* Fill in media characteristics.
|
|
*/
|
|
ifmedia_init(&ic->ic_media, 0, media_change, media_stat);
|
|
maxrate = 0;
|
|
/*
|
|
* Add media for legacy operating modes.
|
|
*/
|
|
memset(&allrates, 0, sizeof(allrates));
|
|
for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
|
|
if (isclr(ic->ic_modecaps, mode))
|
|
continue;
|
|
addmedia(ic, mode, IFM_AUTO);
|
|
if (mode == IEEE80211_MODE_AUTO)
|
|
continue;
|
|
rs = &ic->ic_sup_rates[mode];
|
|
for (i = 0; i < rs->rs_nrates; i++) {
|
|
rate = rs->rs_rates[i];
|
|
mword = ieee80211_rate2media(ic, rate, mode);
|
|
if (mword == 0)
|
|
continue;
|
|
addmedia(ic, mode, mword);
|
|
/*
|
|
* Add legacy rate to the collection of all rates.
|
|
*/
|
|
r = rate & IEEE80211_RATE_VAL;
|
|
for (j = 0; j < allrates.rs_nrates; j++)
|
|
if (allrates.rs_rates[j] == r)
|
|
break;
|
|
if (j == allrates.rs_nrates) {
|
|
/* unique, add to the set */
|
|
allrates.rs_rates[j] = r;
|
|
allrates.rs_nrates++;
|
|
}
|
|
rate = (rate & IEEE80211_RATE_VAL) / 2;
|
|
if (rate > maxrate)
|
|
maxrate = rate;
|
|
}
|
|
}
|
|
for (i = 0; i < allrates.rs_nrates; i++) {
|
|
mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
|
|
IEEE80211_MODE_AUTO);
|
|
if (mword == 0)
|
|
continue;
|
|
/* NB: remove media options from mword */
|
|
addmedia(ic, IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
|
|
}
|
|
/*
|
|
* Add HT/11n media. Note that we do not have enough
|
|
* bits in the media subtype to express the MCS so we
|
|
* use a "placeholder" media subtype and any fixed MCS
|
|
* must be specified with a different mechanism.
|
|
*/
|
|
for (; mode < IEEE80211_MODE_MAX; mode++) {
|
|
if (isclr(ic->ic_modecaps, mode))
|
|
continue;
|
|
addmedia(ic, mode, IFM_AUTO);
|
|
addmedia(ic, mode, IFM_IEEE80211_MCS);
|
|
}
|
|
if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
|
|
isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
|
|
addmedia(ic, IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
|
|
/* XXX could walk htrates */
|
|
/* XXX known array size */
|
|
if (ieee80211_htrates[15] > maxrate)
|
|
maxrate = ieee80211_htrates[15];
|
|
}
|
|
|
|
/* NB: strip explicit mode; we're actually in autoselect */
|
|
ifmedia_set(&ic->ic_media,
|
|
media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK);
|
|
|
|
if (maxrate)
|
|
ifp->if_baudrate = IF_Mbps(maxrate);
|
|
}
|
|
|
|
const struct ieee80211_rateset *
|
|
ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
|
|
{
|
|
if (IEEE80211_IS_CHAN_HALF(c))
|
|
return &ieee80211_rateset_half;
|
|
if (IEEE80211_IS_CHAN_QUARTER(c))
|
|
return &ieee80211_rateset_quarter;
|
|
if (IEEE80211_IS_CHAN_HTA(c))
|
|
return &ic->ic_sup_rates[IEEE80211_MODE_11A];
|
|
if (IEEE80211_IS_CHAN_HTG(c)) {
|
|
/* XXX does this work for basic rates? */
|
|
return &ic->ic_sup_rates[IEEE80211_MODE_11G];
|
|
}
|
|
return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
|
|
}
|
|
|
|
void
|
|
ieee80211_announce(struct ieee80211com *ic)
|
|
{
|
|
struct ifnet *ifp = ic->ic_ifp;
|
|
int i, mode, rate, mword;
|
|
const struct ieee80211_rateset *rs;
|
|
|
|
/* NB: skip AUTO since it has no rates */
|
|
for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
|
|
if (isclr(ic->ic_modecaps, mode))
|
|
continue;
|
|
if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
|
|
rs = &ic->ic_sup_rates[mode];
|
|
for (i = 0; i < rs->rs_nrates; i++) {
|
|
mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
|
|
if (mword == 0)
|
|
continue;
|
|
rate = ieee80211_media2rate(mword);
|
|
printf("%s%d%sMbps", (i != 0 ? " " : ""),
|
|
rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
|
|
}
|
|
printf("\n");
|
|
}
|
|
ieee80211_ht_announce(ic);
|
|
}
|
|
|
|
void
|
|
ieee80211_announce_channels(struct ieee80211com *ic)
|
|
{
|
|
const struct ieee80211_channel *c;
|
|
char type;
|
|
int i, cw;
|
|
|
|
printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
|
|
for (i = 0; i < ic->ic_nchans; i++) {
|
|
c = &ic->ic_channels[i];
|
|
if (IEEE80211_IS_CHAN_ST(c))
|
|
type = 'S';
|
|
else if (IEEE80211_IS_CHAN_108A(c))
|
|
type = 'T';
|
|
else if (IEEE80211_IS_CHAN_108G(c))
|
|
type = 'G';
|
|
else if (IEEE80211_IS_CHAN_HT(c))
|
|
type = 'n';
|
|
else if (IEEE80211_IS_CHAN_A(c))
|
|
type = 'a';
|
|
else if (IEEE80211_IS_CHAN_ANYG(c))
|
|
type = 'g';
|
|
else if (IEEE80211_IS_CHAN_B(c))
|
|
type = 'b';
|
|
else
|
|
type = 'f';
|
|
if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
|
|
cw = 40;
|
|
else if (IEEE80211_IS_CHAN_HALF(c))
|
|
cw = 10;
|
|
else if (IEEE80211_IS_CHAN_QUARTER(c))
|
|
cw = 5;
|
|
else
|
|
cw = 20;
|
|
printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
|
|
, c->ic_ieee, c->ic_freq, type
|
|
, cw
|
|
, IEEE80211_IS_CHAN_HT40U(c) ? '+' :
|
|
IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
|
|
, c->ic_maxregpower
|
|
, c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
|
|
, c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
|
|
);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Find an instance by it's mac address.
|
|
*/
|
|
struct ieee80211com *
|
|
ieee80211_find_vap(const uint8_t mac[IEEE80211_ADDR_LEN])
|
|
{
|
|
struct ieee80211com *ic;
|
|
|
|
/* XXX lock */
|
|
SLIST_FOREACH(ic, &ieee80211_list, ic_next)
|
|
if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr))
|
|
return ic;
|
|
return NULL;
|
|
}
|
|
|
|
static struct ieee80211com *
|
|
ieee80211_find_instance(struct ifnet *ifp)
|
|
{
|
|
struct ieee80211com *ic;
|
|
|
|
/* XXX lock */
|
|
/* XXX not right for multiple instances but works for now */
|
|
SLIST_FOREACH(ic, &ieee80211_list, ic_next)
|
|
if (ic->ic_ifp == ifp)
|
|
return ic;
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
|
|
{
|
|
#define IEEERATE(_ic,_m,_i) \
|
|
((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL)
|
|
int i, nrates = ic->ic_sup_rates[mode].rs_nrates;
|
|
for (i = 0; i < nrates; i++)
|
|
if (IEEERATE(ic, mode, i) == rate)
|
|
return i;
|
|
return -1;
|
|
#undef IEEERATE
|
|
}
|
|
|
|
/*
|
|
* Convert a media specification to a rate index and possibly a mode
|
|
* (if the rate is fixed and the mode is specified as ``auto'' then
|
|
* we need to lock down the mode so the index is meanginful).
|
|
*/
|
|
static int
|
|
checkrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
|
|
{
|
|
|
|
/*
|
|
* Check the rate table for the specified/current phy.
|
|
*/
|
|
if (mode == IEEE80211_MODE_AUTO) {
|
|
int i;
|
|
/*
|
|
* In autoselect mode search for the rate.
|
|
*/
|
|
for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
|
|
if (isset(ic->ic_modecaps, i) &&
|
|
findrate(ic, i, rate) != -1)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
} else {
|
|
/*
|
|
* Mode is fixed, check for rate.
|
|
*/
|
|
return (findrate(ic, mode, rate) != -1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Handle a media change request.
|
|
*/
|
|
int
|
|
ieee80211_media_change(struct ifnet *ifp)
|
|
{
|
|
struct ieee80211com *ic;
|
|
struct ifmedia_entry *ime;
|
|
enum ieee80211_opmode newopmode;
|
|
enum ieee80211_phymode newphymode;
|
|
int newrate, error = 0;
|
|
|
|
ic = ieee80211_find_instance(ifp);
|
|
if (!ic) {
|
|
if_printf(ifp, "%s: no 802.11 instance!\n", __func__);
|
|
return EINVAL;
|
|
}
|
|
ime = ic->ic_media.ifm_cur;
|
|
/*
|
|
* First, identify the phy mode.
|
|
*/
|
|
switch (IFM_MODE(ime->ifm_media)) {
|
|
case IFM_IEEE80211_11A:
|
|
newphymode = IEEE80211_MODE_11A;
|
|
break;
|
|
case IFM_IEEE80211_11B:
|
|
newphymode = IEEE80211_MODE_11B;
|
|
break;
|
|
case IFM_IEEE80211_11G:
|
|
newphymode = IEEE80211_MODE_11G;
|
|
break;
|
|
case IFM_IEEE80211_FH:
|
|
newphymode = IEEE80211_MODE_FH;
|
|
break;
|
|
case IFM_IEEE80211_11NA:
|
|
newphymode = IEEE80211_MODE_11NA;
|
|
break;
|
|
case IFM_IEEE80211_11NG:
|
|
newphymode = IEEE80211_MODE_11NG;
|
|
break;
|
|
case IFM_AUTO:
|
|
newphymode = IEEE80211_MODE_AUTO;
|
|
break;
|
|
default:
|
|
return EINVAL;
|
|
}
|
|
/*
|
|
* Turbo mode is an ``option''.
|
|
* XXX does not apply to AUTO
|
|
*/
|
|
if (ime->ifm_media & IFM_IEEE80211_TURBO) {
|
|
if (newphymode == IEEE80211_MODE_11A) {
|
|
if (ic->ic_flags & IEEE80211_F_TURBOP)
|
|
newphymode = IEEE80211_MODE_TURBO_A;
|
|
else
|
|
newphymode = IEEE80211_MODE_STURBO_A;
|
|
} else if (newphymode == IEEE80211_MODE_11G)
|
|
newphymode = IEEE80211_MODE_TURBO_G;
|
|
else
|
|
return EINVAL;
|
|
}
|
|
/* XXX HT40 +/- */
|
|
/*
|
|
* Next, the fixed/variable rate.
|
|
*/
|
|
newrate = ic->ic_fixed_rate;
|
|
if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
|
|
/*
|
|
* Convert media subtype to rate.
|
|
*/
|
|
newrate = ieee80211_media2rate(ime->ifm_media);
|
|
if (newrate == 0 || !checkrate(ic, newphymode, newrate))
|
|
return EINVAL;
|
|
} else
|
|
newrate = IEEE80211_FIXED_RATE_NONE;
|
|
|
|
/*
|
|
* Deduce new operating mode but don't install it just yet.
|
|
*/
|
|
if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) ==
|
|
(IFM_IEEE80211_ADHOC|IFM_FLAG0))
|
|
newopmode = IEEE80211_M_AHDEMO;
|
|
else if (ime->ifm_media & IFM_IEEE80211_HOSTAP)
|
|
newopmode = IEEE80211_M_HOSTAP;
|
|
else if (ime->ifm_media & IFM_IEEE80211_ADHOC)
|
|
newopmode = IEEE80211_M_IBSS;
|
|
else if (ime->ifm_media & IFM_IEEE80211_MONITOR)
|
|
newopmode = IEEE80211_M_MONITOR;
|
|
else
|
|
newopmode = IEEE80211_M_STA;
|
|
|
|
/*
|
|
* Handle phy mode change.
|
|
*/
|
|
if (ic->ic_des_mode != newphymode) { /* change phy mode */
|
|
ic->ic_des_mode = newphymode;
|
|
error = ENETRESET;
|
|
}
|
|
|
|
/*
|
|
* Committed to changes, install the rate setting.
|
|
*/
|
|
if (ic->ic_fixed_rate != newrate) {
|
|
ic->ic_fixed_rate = newrate; /* set fixed tx rate */
|
|
error = ENETRESET;
|
|
}
|
|
|
|
/*
|
|
* Handle operating mode change.
|
|
*/
|
|
if (ic->ic_opmode != newopmode) {
|
|
ic->ic_opmode = newopmode;
|
|
switch (newopmode) {
|
|
case IEEE80211_M_AHDEMO:
|
|
case IEEE80211_M_HOSTAP:
|
|
case IEEE80211_M_STA:
|
|
case IEEE80211_M_MONITOR:
|
|
case IEEE80211_M_WDS:
|
|
ic->ic_flags &= ~IEEE80211_F_IBSSON;
|
|
break;
|
|
case IEEE80211_M_IBSS:
|
|
ic->ic_flags |= IEEE80211_F_IBSSON;
|
|
break;
|
|
}
|
|
/*
|
|
* Yech, slot time may change depending on the
|
|
* operating mode so reset it to be sure everything
|
|
* is setup appropriately.
|
|
*/
|
|
ieee80211_reset_erp(ic);
|
|
ieee80211_wme_initparams(ic); /* after opmode change */
|
|
error = ENETRESET;
|
|
}
|
|
#ifdef notdef
|
|
if (error == 0)
|
|
ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
|
|
#endif
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Common code to calculate the media status word
|
|
* from the operating mode and channel state.
|
|
*/
|
|
static int
|
|
media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
|
|
{
|
|
int status;
|
|
|
|
status = IFM_IEEE80211;
|
|
switch (opmode) {
|
|
case IEEE80211_M_STA:
|
|
break;
|
|
case IEEE80211_M_IBSS:
|
|
status |= IFM_IEEE80211_ADHOC;
|
|
break;
|
|
case IEEE80211_M_HOSTAP:
|
|
status |= IFM_IEEE80211_HOSTAP;
|
|
break;
|
|
case IEEE80211_M_MONITOR:
|
|
status |= IFM_IEEE80211_MONITOR;
|
|
break;
|
|
case IEEE80211_M_AHDEMO:
|
|
status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
|
|
break;
|
|
case IEEE80211_M_WDS:
|
|
/* should not come here */
|
|
break;
|
|
}
|
|
if (IEEE80211_IS_CHAN_HTA(chan)) {
|
|
status |= IFM_IEEE80211_11NA;
|
|
} else if (IEEE80211_IS_CHAN_HTG(chan)) {
|
|
status |= IFM_IEEE80211_11NG;
|
|
} else if (IEEE80211_IS_CHAN_A(chan)) {
|
|
status |= IFM_IEEE80211_11A;
|
|
} else if (IEEE80211_IS_CHAN_B(chan)) {
|
|
status |= IFM_IEEE80211_11B;
|
|
} else if (IEEE80211_IS_CHAN_ANYG(chan)) {
|
|
status |= IFM_IEEE80211_11G;
|
|
} else if (IEEE80211_IS_CHAN_FHSS(chan)) {
|
|
status |= IFM_IEEE80211_FH;
|
|
}
|
|
/* XXX else complain? */
|
|
|
|
if (IEEE80211_IS_CHAN_TURBO(chan))
|
|
status |= IFM_IEEE80211_TURBO;
|
|
|
|
return status;
|
|
}
|
|
|
|
void
|
|
ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
|
|
{
|
|
struct ieee80211com *ic;
|
|
enum ieee80211_phymode mode;
|
|
const struct ieee80211_rateset *rs;
|
|
|
|
ic = ieee80211_find_instance(ifp);
|
|
if (!ic) {
|
|
if_printf(ifp, "%s: no 802.11 instance!\n", __func__);
|
|
return;
|
|
}
|
|
imr->ifm_status = IFM_AVALID;
|
|
/*
|
|
* NB: use the current channel's mode to lock down a xmit
|
|
* rate only when running; otherwise we may have a mismatch
|
|
* in which case the rate will not be convertible.
|
|
*/
|
|
if (ic->ic_state == IEEE80211_S_RUN) {
|
|
imr->ifm_status |= IFM_ACTIVE;
|
|
mode = ieee80211_chan2mode(ic->ic_curchan);
|
|
} else
|
|
mode = IEEE80211_MODE_AUTO;
|
|
imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
|
|
/*
|
|
* Calculate a current rate if possible.
|
|
*/
|
|
if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) {
|
|
/*
|
|
* A fixed rate is set, report that.
|
|
*/
|
|
imr->ifm_active |= ieee80211_rate2media(ic,
|
|
ic->ic_fixed_rate, mode);
|
|
} else if (ic->ic_opmode == IEEE80211_M_STA) {
|
|
/*
|
|
* In station mode report the current transmit rate.
|
|
* XXX HT rate
|
|
*/
|
|
rs = &ic->ic_bss->ni_rates;
|
|
imr->ifm_active |= ieee80211_rate2media(ic,
|
|
rs->rs_rates[ic->ic_bss->ni_txrate], mode);
|
|
} else
|
|
imr->ifm_active |= IFM_AUTO;
|
|
}
|
|
|
|
/*
|
|
* Set the current phy mode and recalculate the active channel
|
|
* set based on the available channels for this mode. Also
|
|
* select a new default/current channel if the current one is
|
|
* inappropriate for this mode.
|
|
*/
|
|
int
|
|
ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
|
|
{
|
|
/*
|
|
* Adjust basic rates in 11b/11g supported rate set.
|
|
* Note that if operating on a hal/quarter rate channel
|
|
* this is a noop as those rates sets are different
|
|
* and used instead.
|
|
*/
|
|
if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
|
|
ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], mode);
|
|
|
|
ic->ic_curmode = mode;
|
|
ieee80211_reset_erp(ic); /* reset ERP state */
|
|
ieee80211_wme_initparams(ic); /* reset WME stat */
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return the phy mode for with the specified channel.
|
|
*/
|
|
enum ieee80211_phymode
|
|
ieee80211_chan2mode(const struct ieee80211_channel *chan)
|
|
{
|
|
|
|
if (IEEE80211_IS_CHAN_HTA(chan))
|
|
return IEEE80211_MODE_11NA;
|
|
else if (IEEE80211_IS_CHAN_HTG(chan))
|
|
return IEEE80211_MODE_11NG;
|
|
else if (IEEE80211_IS_CHAN_108G(chan))
|
|
return IEEE80211_MODE_TURBO_G;
|
|
else if (IEEE80211_IS_CHAN_ST(chan))
|
|
return IEEE80211_MODE_STURBO_A;
|
|
else if (IEEE80211_IS_CHAN_TURBO(chan))
|
|
return IEEE80211_MODE_TURBO_A;
|
|
else if (IEEE80211_IS_CHAN_A(chan))
|
|
return IEEE80211_MODE_11A;
|
|
else if (IEEE80211_IS_CHAN_ANYG(chan))
|
|
return IEEE80211_MODE_11G;
|
|
else if (IEEE80211_IS_CHAN_B(chan))
|
|
return IEEE80211_MODE_11B;
|
|
else if (IEEE80211_IS_CHAN_FHSS(chan))
|
|
return IEEE80211_MODE_FH;
|
|
|
|
/* NB: should not get here */
|
|
printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
|
|
__func__, chan->ic_freq, chan->ic_flags);
|
|
return IEEE80211_MODE_11B;
|
|
}
|
|
|
|
struct ratemedia {
|
|
u_int match; /* rate + mode */
|
|
u_int media; /* if_media rate */
|
|
};
|
|
|
|
static int
|
|
findmedia(const struct ratemedia rates[], int n, u_int match)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n; i++)
|
|
if (rates[i].match == match)
|
|
return rates[i].media;
|
|
return IFM_AUTO;
|
|
}
|
|
|
|
/*
|
|
* Convert IEEE80211 rate value to ifmedia subtype.
|
|
* Rate is either a legacy rate in units of 0.5Mbps
|
|
* or an MCS index.
|
|
*/
|
|
int
|
|
ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
|
|
{
|
|
#define N(a) (sizeof(a) / sizeof(a[0]))
|
|
static const struct ratemedia rates[] = {
|
|
{ 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
|
|
{ 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
|
|
{ 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
|
|
{ 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
|
|
{ 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
|
|
{ 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
|
|
{ 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
|
|
{ 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
|
|
{ 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
|
|
{ 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
|
|
{ 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
|
|
{ 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
|
|
{ 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
|
|
{ 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
|
|
{ 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
|
|
{ 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
|
|
{ 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
|
|
{ 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
|
|
{ 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
|
|
{ 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
|
|
{ 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
|
|
{ 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
|
|
{ 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
|
|
{ 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
|
|
{ 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
|
|
{ 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
|
|
{ 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
|
|
{ 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
|
|
{ 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
|
|
{ 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
|
|
/* NB: OFDM72 doesn't realy exist so we don't handle it */
|
|
};
|
|
static const struct ratemedia htrates[] = {
|
|
{ 0, IFM_IEEE80211_MCS },
|
|
{ 1, IFM_IEEE80211_MCS },
|
|
{ 2, IFM_IEEE80211_MCS },
|
|
{ 3, IFM_IEEE80211_MCS },
|
|
{ 4, IFM_IEEE80211_MCS },
|
|
{ 5, IFM_IEEE80211_MCS },
|
|
{ 6, IFM_IEEE80211_MCS },
|
|
{ 7, IFM_IEEE80211_MCS },
|
|
{ 8, IFM_IEEE80211_MCS },
|
|
{ 9, IFM_IEEE80211_MCS },
|
|
{ 10, IFM_IEEE80211_MCS },
|
|
{ 11, IFM_IEEE80211_MCS },
|
|
{ 12, IFM_IEEE80211_MCS },
|
|
{ 13, IFM_IEEE80211_MCS },
|
|
{ 14, IFM_IEEE80211_MCS },
|
|
{ 15, IFM_IEEE80211_MCS },
|
|
};
|
|
int m;
|
|
|
|
/*
|
|
* Check 11n rates first for match as an MCS.
|
|
*/
|
|
if (mode == IEEE80211_MODE_11NA) {
|
|
if (rate & IEEE80211_RATE_MCS) {
|
|
rate &= ~IEEE80211_RATE_MCS;
|
|
m = findmedia(htrates, N(htrates), rate);
|
|
if (m != IFM_AUTO)
|
|
return m | IFM_IEEE80211_11NA;
|
|
}
|
|
} else if (mode == IEEE80211_MODE_11NG) {
|
|
/* NB: 12 is ambiguous, it will be treated as an MCS */
|
|
if (rate & IEEE80211_RATE_MCS) {
|
|
rate &= ~IEEE80211_RATE_MCS;
|
|
m = findmedia(htrates, N(htrates), rate);
|
|
if (m != IFM_AUTO)
|
|
return m | IFM_IEEE80211_11NG;
|
|
}
|
|
}
|
|
rate &= IEEE80211_RATE_VAL;
|
|
switch (mode) {
|
|
case IEEE80211_MODE_11A:
|
|
case IEEE80211_MODE_11NA:
|
|
case IEEE80211_MODE_TURBO_A:
|
|
case IEEE80211_MODE_STURBO_A:
|
|
return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
|
|
case IEEE80211_MODE_11B:
|
|
return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
|
|
case IEEE80211_MODE_FH:
|
|
return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
|
|
case IEEE80211_MODE_AUTO:
|
|
/* NB: ic may be NULL for some drivers */
|
|
if (ic && ic->ic_phytype == IEEE80211_T_FH)
|
|
return findmedia(rates, N(rates),
|
|
rate | IFM_IEEE80211_FH);
|
|
/* NB: hack, 11g matches both 11b+11a rates */
|
|
/* fall thru... */
|
|
case IEEE80211_MODE_11G:
|
|
case IEEE80211_MODE_11NG:
|
|
case IEEE80211_MODE_TURBO_G:
|
|
return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
|
|
}
|
|
return IFM_AUTO;
|
|
#undef N
|
|
}
|
|
|
|
int
|
|
ieee80211_media2rate(int mword)
|
|
{
|
|
#define N(a) (sizeof(a) / sizeof(a[0]))
|
|
static const int ieeerates[] = {
|
|
-1, /* IFM_AUTO */
|
|
0, /* IFM_MANUAL */
|
|
0, /* IFM_NONE */
|
|
2, /* IFM_IEEE80211_FH1 */
|
|
4, /* IFM_IEEE80211_FH2 */
|
|
2, /* IFM_IEEE80211_DS1 */
|
|
4, /* IFM_IEEE80211_DS2 */
|
|
11, /* IFM_IEEE80211_DS5 */
|
|
22, /* IFM_IEEE80211_DS11 */
|
|
44, /* IFM_IEEE80211_DS22 */
|
|
12, /* IFM_IEEE80211_OFDM6 */
|
|
18, /* IFM_IEEE80211_OFDM9 */
|
|
24, /* IFM_IEEE80211_OFDM12 */
|
|
36, /* IFM_IEEE80211_OFDM18 */
|
|
48, /* IFM_IEEE80211_OFDM24 */
|
|
72, /* IFM_IEEE80211_OFDM36 */
|
|
96, /* IFM_IEEE80211_OFDM48 */
|
|
108, /* IFM_IEEE80211_OFDM54 */
|
|
144, /* IFM_IEEE80211_OFDM72 */
|
|
0, /* IFM_IEEE80211_DS354k */
|
|
0, /* IFM_IEEE80211_DS512k */
|
|
6, /* IFM_IEEE80211_OFDM3 */
|
|
9, /* IFM_IEEE80211_OFDM4 */
|
|
54, /* IFM_IEEE80211_OFDM27 */
|
|
-1, /* IFM_IEEE80211_MCS */
|
|
};
|
|
return IFM_SUBTYPE(mword) < N(ieeerates) ?
|
|
ieeerates[IFM_SUBTYPE(mword)] : 0;
|
|
#undef N
|
|
}
|