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cfg80211: refactor association parameters
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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: Johannes Berg <johannes.berg@intel.com>
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Johannes Berg committed Mar 6, 2013
1 parent dd5ecfe commit f62fab7
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Showing 4 changed files with 63 additions and 104 deletions.
21 changes: 6 additions & 15 deletions net/wireless/core.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down
64 changes: 16 additions & 48 deletions net/wireless/mlme.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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.
Expand All @@ -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,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
if (!req.bss) {
req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
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;
Expand All @@ -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);

Expand Down
54 changes: 26 additions & 28 deletions net/wireless/nl80211.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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;
Expand Down Expand Up @@ -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;
}
Expand Down
28 changes: 15 additions & 13 deletions net/wireless/sme.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -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);
Expand All @@ -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,
Expand Down

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