Example #1
0
static char
channel_type(const struct ieee80211_channel *c)
{
	if (IEEE80211_IS_CHAN_ST(c))
		return 'S';
	if (IEEE80211_IS_CHAN_108A(c))
		return 'T';
	if (IEEE80211_IS_CHAN_108G(c))
		return 'G';
	if (IEEE80211_IS_CHAN_HT(c))
		return 'n';
	if (IEEE80211_IS_CHAN_A(c))
		return 'a';
	if (IEEE80211_IS_CHAN_ANYG(c))
		return 'g';
	if (IEEE80211_IS_CHAN_B(c))
		return 'b';
	return 'f';
}
Example #2
0
/*
 * Fill in 802.11 available channel set, mark
 * all available channels as active, and pick
 * a default channel if not already specified.
 */
static void
ieee80211_chan_init(struct ieee80211com *ic)
{
#define	DEFAULTRATES(m, def) do { \
	if (ic->ic_sup_rates[m].rs_nrates == 0) \
		ic->ic_sup_rates[m] = def; \
} while (0)
	struct ieee80211_channel *c;
	int i;

	KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
		("invalid number of channels specified: %u", ic->ic_nchans));
	memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
	memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
	setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
	for (i = 0; i < ic->ic_nchans; i++) {
		c = &ic->ic_channels[i];
		KASSERT(c->ic_flags != 0, ("channel with no flags"));
		/*
		 * Help drivers that work only with frequencies by filling
		 * in IEEE channel #'s if not already calculated.  Note this
		 * mimics similar work done in ieee80211_setregdomain when
		 * changing regulatory state.
		 */
		if (c->ic_ieee == 0)
			c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
		if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
			c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
			    (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
			    c->ic_flags);
		/* default max tx power to max regulatory */
		if (c->ic_maxpower == 0)
			c->ic_maxpower = 2*c->ic_maxregpower;
		setbit(ic->ic_chan_avail, c->ic_ieee);
		/*
		 * Identify mode capabilities.
		 */
		if (IEEE80211_IS_CHAN_A(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
		if (IEEE80211_IS_CHAN_B(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
		if (IEEE80211_IS_CHAN_ANYG(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
		if (IEEE80211_IS_CHAN_FHSS(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
		if (IEEE80211_IS_CHAN_108A(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
		if (IEEE80211_IS_CHAN_108G(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
		if (IEEE80211_IS_CHAN_ST(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
		if (IEEE80211_IS_CHAN_HALF(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
		if (IEEE80211_IS_CHAN_QUARTER(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
		if (IEEE80211_IS_CHAN_HTA(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
		if (IEEE80211_IS_CHAN_HTG(c))
			setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
	}
	/* initialize candidate channels to all available */
	memcpy(ic->ic_chan_active, ic->ic_chan_avail,
		sizeof(ic->ic_chan_avail));

	/* sort channel table to allow lookup optimizations */
	ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);

	/* invalidate any previous state */
	ic->ic_bsschan = IEEE80211_CHAN_ANYC;
	ic->ic_prevchan = NULL;
	ic->ic_csa_newchan = NULL;
	/* arbitrarily pick the first channel */
	ic->ic_curchan = &ic->ic_channels[0];
	ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);

	/* fillin well-known rate sets if driver has not specified */
	DEFAULTRATES(IEEE80211_MODE_11B,	 ieee80211_rateset_11b);
	DEFAULTRATES(IEEE80211_MODE_11G,	 ieee80211_rateset_11g);
	DEFAULTRATES(IEEE80211_MODE_11A,	 ieee80211_rateset_11a);
	DEFAULTRATES(IEEE80211_MODE_TURBO_A,	 ieee80211_rateset_11a);
	DEFAULTRATES(IEEE80211_MODE_TURBO_G,	 ieee80211_rateset_11g);
	DEFAULTRATES(IEEE80211_MODE_STURBO_A,	 ieee80211_rateset_11a);
	DEFAULTRATES(IEEE80211_MODE_HALF,	 ieee80211_rateset_half);
	DEFAULTRATES(IEEE80211_MODE_QUARTER,	 ieee80211_rateset_quarter);
	DEFAULTRATES(IEEE80211_MODE_11NA,	 ieee80211_rateset_11a);
	DEFAULTRATES(IEEE80211_MODE_11NG,	 ieee80211_rateset_11g);

	/*
	 * Set auto mode to reset active channel state and any desired channel.
	 */
	(void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
#undef DEFAULTRATES
}