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Commit f62fab73 authored by Johannes Berg's avatar Johannes Berg
Browse files

cfg80211: refactor association parameters 



cfg80211_mlme_assoc() has grown far too many arguments,
make the caller build almost all of the driver struct
and pass that to the function instead.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent dd5ecfea

net/wireless/core.h

+6 −15
Original line number Diff line number Diff line
@@ -330,24 +330,15 @@ int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, 
int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,

			  struct net_device *dev,

			  struct ieee80211_channel *chan,

			  const u8 *bssid, const u8 *prev_bssid,

			  const u8 *bssid,

			  const u8 *ssid, int ssid_len,

			  const u8 *ie, int ie_len, bool use_mfp,

			  struct cfg80211_crypto_settings *crypt,

			  u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,

			  struct ieee80211_ht_cap *ht_capa_mask,

			  struct ieee80211_vht_cap *vht_capa,

			  struct ieee80211_vht_cap *vht_capa_mask);

			  struct cfg80211_assoc_request *req);

int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,

			struct net_device *dev, struct ieee80211_channel *chan,

			const u8 *bssid, const u8 *prev_bssid,

			struct net_device *dev,

			struct ieee80211_channel *chan,

			const u8 *bssid,

			const u8 *ssid, int ssid_len,

			const u8 *ie, int ie_len, bool use_mfp,

			struct cfg80211_crypto_settings *crypt,

			u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,

			struct ieee80211_ht_cap *ht_capa_mask,

			struct ieee80211_vht_cap *vht_capa,

			struct ieee80211_vht_cap *vht_capa_mask);

			struct cfg80211_assoc_request *req);

int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,

			   struct net_device *dev, const u8 *bssid,

			   const u8 *ie, int ie_len, u16 reason,

net/wireless/mlme.c

+16 −48
Original line number Diff line number Diff line
@@ -363,26 +363,18 @@ void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, 
int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,

			  struct net_device *dev,

			  struct ieee80211_channel *chan,

			  const u8 *bssid, const u8 *prev_bssid,

			  const u8 *bssid,

			  const u8 *ssid, int ssid_len,

			  const u8 *ie, int ie_len, bool use_mfp,

			  struct cfg80211_crypto_settings *crypt,

			  u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,

			  struct ieee80211_ht_cap *ht_capa_mask,

			  struct ieee80211_vht_cap *vht_capa,

			  struct ieee80211_vht_cap *vht_capa_mask)

			  struct cfg80211_assoc_request *req)

{

	struct wireless_dev *wdev = dev->ieee80211_ptr;

	struct cfg80211_assoc_request req;

	int err;

	bool was_connected = false;



	ASSERT_WDEV_LOCK(wdev);



	memset(&req, 0, sizeof(req));



	if (wdev->current_bss && prev_bssid &&

	    ether_addr_equal(wdev->current_bss->pub.bssid, prev_bssid)) {

	if (wdev->current_bss && req->prev_bssid &&

	    ether_addr_equal(wdev->current_bss->pub.bssid, req->prev_bssid)) {

		/*

		 * Trying to reassociate: Allow this to proceed and let the old

		 * association to be dropped when the new one is completed.
@@ -394,47 +386,30 @@ int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 
	} else if (wdev->current_bss)

		return -EALREADY;



	req.ie = ie;

	req.ie_len = ie_len;

	memcpy(&req.crypto, crypt, sizeof(req.crypto));

	req.use_mfp = use_mfp;

	req.prev_bssid = prev_bssid;

	req.flags = assoc_flags;

	if (ht_capa)

		memcpy(&req.ht_capa, ht_capa, sizeof(req.ht_capa));

	if (ht_capa_mask)

		memcpy(&req.ht_capa_mask, ht_capa_mask,

		       sizeof(req.ht_capa_mask));

	cfg80211_oper_and_ht_capa(&req.ht_capa_mask,

	cfg80211_oper_and_ht_capa(&req->ht_capa_mask,

				  rdev->wiphy.ht_capa_mod_mask);

	if (vht_capa)

		memcpy(&req.vht_capa, vht_capa, sizeof(req.vht_capa));

	if (vht_capa_mask)

		memcpy(&req.vht_capa_mask, vht_capa_mask,

		       sizeof(req.vht_capa_mask));

	cfg80211_oper_and_vht_capa(&req.vht_capa_mask,

	cfg80211_oper_and_vht_capa(&req->vht_capa_mask,

				   rdev->wiphy.vht_capa_mod_mask);



	req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,

	req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,

				    WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);

	if (!req.bss) {

	if (!req->bss) {

		if (was_connected)

			wdev->sme_state = CFG80211_SME_CONNECTED;

		return -ENOENT;

	}



	err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel,

				    CHAN_MODE_SHARED);

	err = cfg80211_can_use_chan(rdev, wdev, chan, CHAN_MODE_SHARED);

	if (err)

		goto out;



	err = rdev_assoc(rdev, dev, &req);

	err = rdev_assoc(rdev, dev, req);



out:

	if (err) {

		if (was_connected)

			wdev->sme_state = CFG80211_SME_CONNECTED;

		cfg80211_put_bss(&rdev->wiphy, req.bss);

		cfg80211_put_bss(&rdev->wiphy, req->bss);

	}



	return err;
@@ -443,24 +418,17 @@ int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, 
int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,

			struct net_device *dev,

			struct ieee80211_channel *chan,

			const u8 *bssid, const u8 *prev_bssid,

			const u8 *bssid,

			const u8 *ssid, int ssid_len,

			const u8 *ie, int ie_len, bool use_mfp,

			struct cfg80211_crypto_settings *crypt,

			u32 assoc_flags, struct ieee80211_ht_cap *ht_capa,

			struct ieee80211_ht_cap *ht_capa_mask,

			struct ieee80211_vht_cap *vht_capa,

			struct ieee80211_vht_cap *vht_capa_mask)

			struct cfg80211_assoc_request *req)

{

	struct wireless_dev *wdev = dev->ieee80211_ptr;

	int err;



	mutex_lock(&rdev->devlist_mtx);

	wdev_lock(wdev);

	err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,

				    ssid, ssid_len, ie, ie_len, use_mfp, crypt,

				    assoc_flags, ht_capa, ht_capa_mask,

				    vht_capa, vht_capa_mask);

	err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid,

				    ssid, ssid_len, req);

	wdev_unlock(wdev);

	mutex_unlock(&rdev->devlist_mtx);

net/wireless/nl80211.c

+26 −28
Original line number Diff line number Diff line
@@ -5984,16 +5984,10 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info) 
{

	struct cfg80211_registered_device *rdev = info->user_ptr[0];

	struct net_device *dev = info->user_ptr[1];

	struct cfg80211_crypto_settings crypto;

	struct ieee80211_channel *chan;

	const u8 *bssid, *ssid, *ie = NULL, *prev_bssid = NULL;

	int err, ssid_len, ie_len = 0;

	bool use_mfp = false;

	u32 flags = 0;

	struct ieee80211_ht_cap *ht_capa = NULL;

	struct ieee80211_ht_cap *ht_capa_mask = NULL;

	struct ieee80211_vht_cap *vht_capa = NULL;

	struct ieee80211_vht_cap *vht_capa_mask = NULL;

	struct cfg80211_assoc_request req = {};

	const u8 *bssid, *ssid;

	int err, ssid_len = 0;



	if (!is_valid_ie_attr(info->attrs[NL80211_ATTR_IE]))

		return -EINVAL;
@@ -6021,54 +6015,58 @@ static int nl80211_associate(struct sk_buff *skb, struct genl_info *info) 
	ssid_len = nla_len(info->attrs[NL80211_ATTR_SSID]);



	if (info->attrs[NL80211_ATTR_IE]) {

		ie = nla_data(info->attrs[NL80211_ATTR_IE]);

		ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);

		req.ie = nla_data(info->attrs[NL80211_ATTR_IE]);

		req.ie_len = nla_len(info->attrs[NL80211_ATTR_IE]);

	}



	if (info->attrs[NL80211_ATTR_USE_MFP]) {

		enum nl80211_mfp mfp =

			nla_get_u32(info->attrs[NL80211_ATTR_USE_MFP]);

		if (mfp == NL80211_MFP_REQUIRED)

			use_mfp = true;

			req.use_mfp = true;

		else if (mfp != NL80211_MFP_NO)

			return -EINVAL;

	}



	if (info->attrs[NL80211_ATTR_PREV_BSSID])

		prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);

		req.prev_bssid = nla_data(info->attrs[NL80211_ATTR_PREV_BSSID]);



	if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_HT]))

		flags |= ASSOC_REQ_DISABLE_HT;

		req.flags |= ASSOC_REQ_DISABLE_HT;



	if (info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])

		ht_capa_mask =

			nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]);

		memcpy(&req.ht_capa_mask,

		       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK]),

		       sizeof(req.ht_capa_mask));



	if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) {

		if (!ht_capa_mask)

		if (!info->attrs[NL80211_ATTR_HT_CAPABILITY_MASK])

			return -EINVAL;

		ht_capa = nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]);

		memcpy(&req.ht_capa,

		       nla_data(info->attrs[NL80211_ATTR_HT_CAPABILITY]),

		       sizeof(req.ht_capa));

	}



	if (nla_get_flag(info->attrs[NL80211_ATTR_DISABLE_VHT]))

		flags |= ASSOC_REQ_DISABLE_VHT;

		req.flags |= ASSOC_REQ_DISABLE_VHT;



	if (info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])

		vht_capa_mask =

			nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]);

		memcpy(&req.vht_capa_mask,

		       nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK]),

		       sizeof(req.vht_capa_mask));



	if (info->attrs[NL80211_ATTR_VHT_CAPABILITY]) {

		if (!vht_capa_mask)

		if (!info->attrs[NL80211_ATTR_VHT_CAPABILITY_MASK])

			return -EINVAL;

		vht_capa = nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]);

		memcpy(&req.vht_capa,

		       nla_data(info->attrs[NL80211_ATTR_VHT_CAPABILITY]),

		       sizeof(req.vht_capa));

	}



	err = nl80211_crypto_settings(rdev, info, &crypto, 1);

	err = nl80211_crypto_settings(rdev, info, &req.crypto, 1);

	if (!err)

		err = cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,

					  ssid, ssid_len, ie, ie_len, use_mfp,

					  &crypto, flags, ht_capa, ht_capa_mask,

					  vht_capa, vht_capa_mask);

		err = cfg80211_mlme_assoc(rdev, dev, chan, bssid,

					  ssid, ssid_len, &req);



	return err;

}

net/wireless/sme.c

+15 −13
Original line number Diff line number Diff line
@@ -159,7 +159,7 @@ static int cfg80211_conn_do_work(struct wireless_dev *wdev) 
{

	struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);

	struct cfg80211_connect_params *params;

	const u8 *prev_bssid = NULL;

	struct cfg80211_assoc_request req = {};

	int err;



	ASSERT_WDEV_LOCK(wdev);
@@ -186,18 +186,20 @@ static int cfg80211_conn_do_work(struct wireless_dev *wdev) 
		BUG_ON(!rdev->ops->assoc);

		wdev->conn->state = CFG80211_CONN_ASSOCIATING;

		if (wdev->conn->prev_bssid_valid)

			prev_bssid = wdev->conn->prev_bssid;

		err = __cfg80211_mlme_assoc(rdev, wdev->netdev,

					    params->channel, params->bssid,

					    prev_bssid,

					    params->ssid, params->ssid_len,

					    params->ie, params->ie_len,

					    params->mfp != NL80211_MFP_NO,

					    &params->crypto,

					    params->flags, &params->ht_capa,

					    &params->ht_capa_mask,

					    &params->vht_capa,

					    &params->vht_capa_mask);

			req.prev_bssid = wdev->conn->prev_bssid;

		req.ie = params->ie;

		req.ie_len = params->ie_len;

		req.use_mfp = params->mfp != NL80211_MFP_NO;

		req.crypto = params->crypto;

		req.flags = params->flags;

		req.ht_capa = params->ht_capa;

		req.ht_capa_mask = params->ht_capa_mask;

		req.vht_capa = params->vht_capa;

		req.vht_capa_mask = params->vht_capa_mask;



		err = __cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel,

					    params->bssid, params->ssid,

					    params->ssid_len, &req);

		if (err)

			__cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,

					       NULL, 0,