Function dfs_timeout

freebsd/net80211/ieee80211_dfs.c:235–273

}

static void
dfs_timeout(void *arg)
{
	struct ieee80211com *ic = arg;
	struct ieee80211_dfs_state *dfs = &ic->ic_dfs;
	struct ieee80211_channel *c;
	int i, oldest, now;

	IEEE80211_LOCK_ASSERT(ic);

	now = oldest = ticks;
	for (i = 0; i < ic->ic_nchans; i++) {
		c = &ic->ic_channels[i];
		if (IEEE80211_IS_CHAN_RADAR(c)) {
			if (ieee80211_time_after_eq(now, dfs->nol_event[i]+NOL_TIMEOUT)) {
				c->ic_state &= ~IEEE80211_CHANSTATE_RADAR;
				if (c->ic_state & IEEE80211_CHANSTATE_NORADAR) {
					/*
					 * NB: do this here so we get only one
					 * msg instead of one for every channel
					 * table entry.
					 */
					ic_printf(ic, "radar on channel %u "
					    "(%u MHz) cleared after timeout\n",
					    c->ic_ieee, c->ic_freq);
					/* notify user space */
					c->ic_state &=
					    ~IEEE80211_CHANSTATE_NORADAR;
					ieee80211_notify_radar(ic, c);
				}
			} else if (dfs->nol_event[i] < oldest)
				oldest = dfs->nol_event[i];
		}
	}
	if (oldest != now) {
		/* arrange to process next channel up for a status change */
		callout_schedule(&dfs->nol_timer, oldest + NOL_TIMEOUT - now);
	}
}

static void
announce_radar(struct ieee80211com *ic, const struct ieee80211_channel *curchan,