Commit 65fc73ac authored by Jouni Malinen's avatar Jouni Malinen Committed by John W. Linville
Browse files

nl80211: Remove NL80211_CMD_SET_MGMT_EXTRA_IE 



The functionality that NL80211_CMD_SET_MGMT_EXTRA_IE provided can now
be achieved with cleaner design by adding IE(s) into
NL80211_CMD_TRIGGER_SCAN, NL80211_CMD_AUTHENTICATE,
NL80211_CMD_ASSOCIATE, NL80211_CMD_DEAUTHENTICATE, and
NL80211_CMD_DISASSOCIATE.

Since this is a very recently added command and there are no known (or
known planned) applications using NL80211_CMD_SET_MGMT_EXTRA_IE and
taken into account how much extra complexity it adds to the IE
processing we have now (and need to add in the future to fix IE order
in couple of frames), it looks like the best option is to just remove
the implementation of this command for now. The enum values themselves
are left to avoid changing the nl80211 command or attribute numbers.

Signed-off-by: default avatarJouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent feeb4445

include/linux/nl80211.h

+7 −1
Original line number Diff line number Diff line
@@ -142,6 +142,12 @@ 
 *	%NL80211_ATTR_IE. If the command succeeds, the requested data will be

 *	added to all specified management frames generated by

 *	kernel/firmware/driver.

 *	Note: This command has been removed and it is only reserved at this

 *	point to avoid re-using existing command number. The functionality this

 *	command was planned for has been provided with cleaner design with the

 *	option to specify additional IEs in NL80211_CMD_TRIGGER_SCAN,

 *	NL80211_CMD_AUTHENTICATE, NL80211_CMD_ASSOCIATE,

 *	NL80211_CMD_DEAUTHENTICATE, and NL80211_CMD_DISASSOCIATE.

 *

 * @NL80211_CMD_GET_SCAN: get scan results

 * @NL80211_CMD_TRIGGER_SCAN: trigger a new scan with the given parameters
@@ -238,7 +244,7 @@ enum nl80211_commands { 
	NL80211_CMD_GET_MESH_PARAMS,

	NL80211_CMD_SET_MESH_PARAMS,



	NL80211_CMD_SET_MGMT_EXTRA_IE,

	NL80211_CMD_SET_MGMT_EXTRA_IE /* reserved; not used */,



	NL80211_CMD_GET_REG,

include/net/cfg80211.h

+0 −26
Original line number Diff line number Diff line
@@ -471,26 +471,6 @@ struct ieee80211_txq_params { 
	u8 aifs;

};



/**

 * struct mgmt_extra_ie_params - Extra management frame IE parameters

 *

 * Used to add extra IE(s) into management frames. If the driver cannot add the

 * requested data into all management frames of the specified subtype that are

 * generated in kernel or firmware/hardware, it must reject the configuration

 * call. The IE data buffer is added to the end of the specified management

 * frame body after all other IEs. This addition is not applied to frames that

 * are injected through a monitor interface.

 *

 * @subtype: Management frame subtype

 * @ies: IE data buffer or %NULL to remove previous data

 * @ies_len: Length of @ies in octets

 */

struct mgmt_extra_ie_params {

	u8 subtype;

	u8 *ies;

	int ies_len;

};



/* from net/wireless.h */

struct wiphy;
@@ -743,8 +723,6 @@ struct cfg80211_disassoc_request { 
 *

 * @set_channel: Set channel

 *

 * @set_mgmt_extra_ie: Set extra IE data for management frames

 *

 * @scan: Request to do a scan. If returning zero, the scan request is given

 *	the driver, and will be valid until passed to cfg80211_scan_done().

 *	For scan results, call cfg80211_inform_bss(); you can call this outside
@@ -828,10 +806,6 @@ struct cfg80211_ops { 
			       struct ieee80211_channel *chan,

			       enum nl80211_channel_type channel_type);



	int	(*set_mgmt_extra_ie)(struct wiphy *wiphy,

				     struct net_device *dev,

				     struct mgmt_extra_ie_params *params);



	int	(*scan)(struct wiphy *wiphy, struct net_device *dev,

			struct cfg80211_scan_request *request);

net/mac80211/cfg.c

+0 −86
Original line number Diff line number Diff line
@@ -1181,91 +1181,6 @@ static int ieee80211_set_channel(struct wiphy *wiphy, 
	return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);

}



static int set_mgmt_extra_ie_sta(struct ieee80211_sub_if_data *sdata,

				 u8 subtype, u8 *ies, size_t ies_len)

{

	struct ieee80211_local *local = sdata->local;

	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;



	switch (subtype) {

	case IEEE80211_STYPE_PROBE_REQ >> 4:

		if (local->ops->hw_scan)

			break;

		kfree(ifmgd->ie_probereq);

		ifmgd->ie_probereq = ies;

		ifmgd->ie_probereq_len = ies_len;

		return 0;

	case IEEE80211_STYPE_PROBE_RESP >> 4:

		kfree(ifmgd->ie_proberesp);

		ifmgd->ie_proberesp = ies;

		ifmgd->ie_proberesp_len = ies_len;

		return 0;

	case IEEE80211_STYPE_AUTH >> 4:

		kfree(ifmgd->ie_auth);

		ifmgd->ie_auth = ies;

		ifmgd->ie_auth_len = ies_len;

		return 0;

	case IEEE80211_STYPE_ASSOC_REQ >> 4:

		kfree(ifmgd->ie_assocreq);

		ifmgd->ie_assocreq = ies;

		ifmgd->ie_assocreq_len = ies_len;

		return 0;

	case IEEE80211_STYPE_REASSOC_REQ >> 4:

		kfree(ifmgd->ie_reassocreq);

		ifmgd->ie_reassocreq = ies;

		ifmgd->ie_reassocreq_len = ies_len;

		return 0;

	case IEEE80211_STYPE_DEAUTH >> 4:

		kfree(ifmgd->ie_deauth);

		ifmgd->ie_deauth = ies;

		ifmgd->ie_deauth_len = ies_len;

		return 0;

	case IEEE80211_STYPE_DISASSOC >> 4:

		kfree(ifmgd->ie_disassoc);

		ifmgd->ie_disassoc = ies;

		ifmgd->ie_disassoc_len = ies_len;

		return 0;

	}



	return -EOPNOTSUPP;

}



static int ieee80211_set_mgmt_extra_ie(struct wiphy *wiphy,

				       struct net_device *dev,

				       struct mgmt_extra_ie_params *params)

{

	struct ieee80211_sub_if_data *sdata;

	u8 *ies;

	size_t ies_len;

	int ret = -EOPNOTSUPP;



	if (params->ies) {

		ies = kmemdup(params->ies, params->ies_len, GFP_KERNEL);

		if (ies == NULL)

			return -ENOMEM;

		ies_len = params->ies_len;

	} else {

		ies = NULL;

		ies_len = 0;

	}



	sdata = IEEE80211_DEV_TO_SUB_IF(dev);



	switch (sdata->vif.type) {

	case NL80211_IFTYPE_STATION:

		ret = set_mgmt_extra_ie_sta(sdata, params->subtype,

					    ies, ies_len);

		break;

	default:

		ret = -EOPNOTSUPP;

		break;

	}



	if (ret)

		kfree(ies);

	return ret;

}



#ifdef CONFIG_PM

static int ieee80211_suspend(struct wiphy *wiphy)

{
@@ -1465,7 +1380,6 @@ struct cfg80211_ops mac80211_config_ops = { 
	.change_bss = ieee80211_change_bss,

	.set_txq_params = ieee80211_set_txq_params,

	.set_channel = ieee80211_set_channel,

	.set_mgmt_extra_ie = ieee80211_set_mgmt_extra_ie,

	.suspend = ieee80211_suspend,

	.resume = ieee80211_resume,

	.scan = ieee80211_scan,

net/mac80211/ieee80211_i.h

+0 −15
Original line number Diff line number Diff line
@@ -323,21 +323,6 @@ struct ieee80211_if_managed { 
	int wmm_last_param_set;



	/* Extra IE data for management frames */

	u8 *ie_probereq;

	size_t ie_probereq_len;

	u8 *ie_proberesp;

	size_t ie_proberesp_len;

	u8 *ie_auth;

	size_t ie_auth_len;

	u8 *ie_assocreq;

	size_t ie_assocreq_len;

	u8 *ie_reassocreq;

	size_t ie_reassocreq_len;

	u8 *ie_deauth;

	size_t ie_deauth_len;

	u8 *ie_disassoc;

	size_t ie_disassoc_len;



	u8 *sme_auth_ie;

	size_t sme_auth_ie_len;

};

net/mac80211/iface.c

+0 −7
Original line number Diff line number Diff line
@@ -653,13 +653,6 @@ static void ieee80211_teardown_sdata(struct net_device *dev) 
		kfree(sdata->u.mgd.extra_ie);

		kfree(sdata->u.mgd.assocreq_ies);

		kfree(sdata->u.mgd.assocresp_ies);

		kfree(sdata->u.mgd.ie_probereq);

		kfree(sdata->u.mgd.ie_proberesp);

		kfree(sdata->u.mgd.ie_auth);

		kfree(sdata->u.mgd.ie_assocreq);

		kfree(sdata->u.mgd.ie_reassocreq);

		kfree(sdata->u.mgd.ie_deauth);

		kfree(sdata->u.mgd.ie_disassoc);

		kfree(sdata->u.mgd.sme_auth_ie);

		break;

	case NL80211_IFTYPE_WDS:

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