Function sta_newstate

freebsd/net80211/ieee80211_sta.c:233–474

* IEEE80211_M_STA vap state machine handler. * This routine handles the main states in the 802.11 protocol. */

 * This routine handles the main states in the 802.11 protocol.
 */
static int
sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
{
	struct ieee80211com *ic = vap->iv_ic;
	struct ieee80211_node *ni;
	enum ieee80211_state ostate;

	IEEE80211_LOCK_ASSERT(ic);

	ostate = vap->iv_state;
	IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
	    __func__, ieee80211_state_name[ostate],
	    ieee80211_state_name[nstate], arg);
	vap->iv_state = nstate;			/* state transition */
	callout_stop(&vap->iv_mgtsend);		/* XXX callout_drain */
	if (ostate != IEEE80211_S_SCAN)
		ieee80211_cancel_scan(vap);	/* background scan */
	ni = vap->iv_bss;			/* NB: no reference held */
	if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)
		callout_stop(&vap->iv_swbmiss);
	switch (nstate) {
	case IEEE80211_S_INIT:
		switch (ostate) {
		case IEEE80211_S_SLEEP:
			/* XXX wakeup */
			/* XXX driver hook to wakeup the hardware? */
		case IEEE80211_S_RUN:
			IEEE80211_SEND_MGMT(ni,
			    IEEE80211_FC0_SUBTYPE_DISASSOC,
			    IEEE80211_REASON_ASSOC_LEAVE);
			ieee80211_sta_leave(ni);
			break;
		case IEEE80211_S_ASSOC:
			IEEE80211_SEND_MGMT(ni,
			    IEEE80211_FC0_SUBTYPE_DEAUTH,
			    IEEE80211_REASON_AUTH_LEAVE);
			break;
		case IEEE80211_S_SCAN:
			ieee80211_cancel_scan(vap);
			break;
		default:
			break;
		}
		if (ostate != IEEE80211_S_INIT) {
			/* NB: optimize INIT -> INIT case */
			ieee80211_reset_bss(vap);
		}
		if (vap->iv_auth->ia_detach != NULL)
			vap->iv_auth->ia_detach(vap);
		break;
	case IEEE80211_S_SCAN:
		switch (ostate) {
		case IEEE80211_S_INIT:
			/*
			 * Initiate a scan.  We can come here as a result
			 * of an IEEE80211_IOC_SCAN_REQ too in which case
			 * the vap will be marked with IEEE80211_FEXT_SCANREQ
			 * and the scan request parameters will be present