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Commit c7e67811 authored by Thomas Pedersen's avatar Thomas Pedersen Committed by Johannes Berg
Browse files

mac80211: factor out peering FSM 



Signed-off-by: default avatarThomas Pedersen <thomas@cozybit.com>
[fix some indentation, squash llid assignment]
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 5bbdd6c6

net/mac80211/mesh_plink.c

+155 −143
Original line number Diff line number Diff line
@@ -691,21 +691,172 @@ static u32 mesh_plink_establish(struct ieee80211_sub_if_data *sdata, 
	return changed;

}



/**

 * mesh_plink_fsm - step @sta MPM based on @event

 *

 * @sdata: interface

 * @sta: mesh neighbor

 * @event: peering event

 *

 * Return: changed MBSS flags

 */

static u32 mesh_plink_fsm(struct ieee80211_sub_if_data *sdata,

			  struct sta_info *sta, enum plink_event event)

{

	struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;

	enum ieee80211_self_protected_actioncode action = 0;

	u32 changed = 0;



	mpl_dbg(sdata, "peer %pM in state %s got event %s\n", sta->sta.addr,

		mplstates[sta->plink_state], mplevents[event]);



	spin_lock_bh(&sta->lock);

	switch (sta->plink_state) {

	case NL80211_PLINK_LISTEN:

		switch (event) {

		case CLS_ACPT:

			mesh_plink_fsm_restart(sta);

			break;

		case OPN_ACPT:

			sta->plink_state = NL80211_PLINK_OPN_RCVD;

			get_random_bytes(&sta->llid, 2);

			mesh_plink_timer_set(sta,

					     mshcfg->dot11MeshRetryTimeout);



			/* set the non-peer mode to active during peering */

			changed |= ieee80211_mps_local_status_update(sdata);

			action = WLAN_SP_MESH_PEERING_OPEN;

			break;

		default:

			break;

		}

		break;

	case NL80211_PLINK_OPN_SNT:

		switch (event) {

		case OPN_RJCT:

		case CNF_RJCT:

		case CLS_ACPT:

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			/* retry timer is left untouched */

			sta->plink_state = NL80211_PLINK_OPN_RCVD;

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		case CNF_ACPT:

			sta->plink_state = NL80211_PLINK_CNF_RCVD;

			if (!mod_plink_timer(sta,

					     mshcfg->dot11MeshConfirmTimeout))

				sta->ignore_plink_timer = true;

			break;

		default:

			break;

		}

		break;

	case NL80211_PLINK_OPN_RCVD:

		switch (event) {

		case OPN_RJCT:

		case CNF_RJCT:

		case CLS_ACPT:

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		case CNF_ACPT:

			changed |= mesh_plink_establish(sdata, sta);

			break;

		default:

			break;

		}

		break;

	case NL80211_PLINK_CNF_RCVD:

		switch (event) {

		case OPN_RJCT:

		case CNF_RJCT:

		case CLS_ACPT:

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			changed |= mesh_plink_establish(sdata, sta);

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		default:

			break;

		}

		break;

	case NL80211_PLINK_ESTAB:

		switch (event) {

		case CLS_ACPT:

			changed |= __mesh_plink_deactivate(sta);

			changed |= mesh_set_ht_prot_mode(sdata);

			changed |= mesh_set_short_slot_time(sdata);

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		default:

			break;

		}

		break;

	case NL80211_PLINK_HOLDING:

		switch (event) {

		case CLS_ACPT:

			if (del_timer(&sta->plink_timer))

				sta->ignore_plink_timer = 1;

			mesh_plink_fsm_restart(sta);

			break;

		case OPN_ACPT:

		case CNF_ACPT:

		case OPN_RJCT:

		case CNF_RJCT:

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		default:

			break;

		}

		break;

	default:

		/* should not get here, PLINK_BLOCKED is dealt with at the

		 * beginning of the function

		 */

		break;

	}

	spin_unlock_bh(&sta->lock);

	if (action) {

		mesh_plink_frame_tx(sdata, action, sta->sta.addr,

				    sta->llid, sta->plid, sta->reason);



		/* also send confirm in open case */

		if (action == WLAN_SP_MESH_PEERING_OPEN) {

			mesh_plink_frame_tx(sdata,

					    WLAN_SP_MESH_PEERING_CONFIRM,

					    sta->sta.addr, sta->llid,

					    sta->plid, 0);

		}

	}



	return changed;

}



static void

mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata,

			 struct ieee80211_mgmt *mgmt,

			 struct ieee802_11_elems *elems)

{



	struct mesh_config *mshcfg = &sdata->u.mesh.mshcfg;

	enum ieee80211_self_protected_actioncode action = 0;

	struct sta_info *sta;

	enum plink_event event;

	enum ieee80211_self_protected_actioncode ftype;

	bool matches_local;

	u32 changed = 0;

	u8 ie_len;

	__le16 plid, llid;

	__le16 plid, llid = 0;



	if (!elems->peering) {

		mpl_dbg(sdata,
@@ -847,146 +998,7 @@ mesh_process_plink_frame(struct ieee80211_sub_if_data *sdata, 
		sta->plid = plid;

	}



	mpl_dbg(sdata, "peer %pM in state %s got event %s\n", mgmt->sa,

		       mplstates[sta->plink_state], mplevents[event]);

	spin_lock_bh(&sta->lock);

	switch (sta->plink_state) {

	case NL80211_PLINK_LISTEN:

		switch (event) {

		case CLS_ACPT:

			mesh_plink_fsm_restart(sta);

			break;

		case OPN_ACPT:

			sta->plink_state = NL80211_PLINK_OPN_RCVD;

			get_random_bytes(&llid, 2);

			sta->llid = llid;

			mesh_plink_timer_set(sta,

					     mshcfg->dot11MeshRetryTimeout);



			/* set the non-peer mode to active during peering */

			changed |= ieee80211_mps_local_status_update(sdata);



			action = WLAN_SP_MESH_PEERING_OPEN;

			break;

		default:

			break;

		}

		break;



	case NL80211_PLINK_OPN_SNT:

		switch (event) {

		case OPN_RJCT:

		case CNF_RJCT:

		case CLS_ACPT:

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;



		case OPN_ACPT:

			/* retry timer is left untouched */

			sta->plink_state = NL80211_PLINK_OPN_RCVD;

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		case CNF_ACPT:

			sta->plink_state = NL80211_PLINK_CNF_RCVD;

			if (!mod_plink_timer(sta,

					     mshcfg->dot11MeshConfirmTimeout))

				sta->ignore_plink_timer = true;



			break;

		default:

			break;

		}

		break;



	case NL80211_PLINK_OPN_RCVD:

		switch (event) {

		case OPN_RJCT:

		case CNF_RJCT:

		case CLS_ACPT:

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		case CNF_ACPT:

			changed |= mesh_plink_establish(sdata, sta);

			break;

		default:

			break;

		}

		break;



	case NL80211_PLINK_CNF_RCVD:

		switch (event) {

		case OPN_RJCT:

		case CNF_RJCT:

		case CLS_ACPT:

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			changed |= mesh_plink_establish(sdata, sta);

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		default:

			break;

		}

		break;



	case NL80211_PLINK_ESTAB:

		switch (event) {

		case CLS_ACPT:

			changed |= __mesh_plink_deactivate(sta);

			changed |= mesh_set_ht_prot_mode(sdata);

			changed |= mesh_set_short_slot_time(sdata);

			mesh_plink_close(sdata, sta, event);

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		case OPN_ACPT:

			action = WLAN_SP_MESH_PEERING_CONFIRM;

			break;

		default:

			break;

		}

		break;

	case NL80211_PLINK_HOLDING:

		switch (event) {

		case CLS_ACPT:

			if (del_timer(&sta->plink_timer))

				sta->ignore_plink_timer = 1;

			mesh_plink_fsm_restart(sta);

			break;

		case OPN_ACPT:

		case CNF_ACPT:

		case OPN_RJCT:

		case CNF_RJCT:

			action = WLAN_SP_MESH_PEERING_CLOSE;

			break;

		default:

			break;

		}

		break;

	default:

		/* should not get here, PLINK_BLOCKED is dealt with at the

		 * beginning of the function

		 */

		break;

	}

	spin_unlock_bh(&sta->lock);

	if (action) {

		mesh_plink_frame_tx(sdata, action, sta->sta.addr,

				    sta->llid, sta->plid, sta->reason);



		/* also send confirm in open case */

		if (action == WLAN_SP_MESH_PEERING_OPEN) {

			mesh_plink_frame_tx(sdata,

					    WLAN_SP_MESH_PEERING_CONFIRM,

					    sta->sta.addr, sta->llid,

					    sta->plid, 0);

		}

	}

	changed |= mesh_plink_fsm(sdata, sta, event);



unlock_rcu:

	rcu_read_unlock();