diff options
Diffstat (limited to 'net/wireless/mlme.c')
| -rw-r--r-- | net/wireless/mlme.c | 1069 |
1 files changed, 583 insertions, 486 deletions
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c index 82e6002c8d6..266766b8d80 100644 --- a/net/wireless/mlme.c +++ b/net/wireless/mlme.c @@ -6,66 +6,30 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/etherdevice.h> #include <linux/netdevice.h> #include <linux/nl80211.h> +#include <linux/slab.h> #include <linux/wireless.h> #include <net/cfg80211.h> #include <net/iw_handler.h> #include "core.h" #include "nl80211.h" +#include "rdev-ops.h" -void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len) -{ - struct wireless_dev *wdev = dev->ieee80211_ptr; - struct wiphy *wiphy = wdev->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); - struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; - u8 *bssid = mgmt->bssid; - int i; - u16 status = le16_to_cpu(mgmt->u.auth.status_code); - bool done = false; - - wdev_lock(wdev); - - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (wdev->authtry_bsses[i] && - memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, - ETH_ALEN) == 0) { - if (status == WLAN_STATUS_SUCCESS) { - wdev->auth_bsses[i] = wdev->authtry_bsses[i]; - } else { - cfg80211_unhold_bss(wdev->authtry_bsses[i]); - cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); - } - wdev->authtry_bsses[i] = NULL; - done = true; - break; - } - } - - WARN_ON(!done); - nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL); - cfg80211_sme_rx_auth(dev, buf, len); - - wdev_unlock(wdev); -} -EXPORT_SYMBOL(cfg80211_send_rx_auth); - -void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len) +void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss, + const u8 *buf, size_t len) { - u16 status_code; struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; u8 *ie = mgmt->u.assoc_resp.variable; - int i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); - struct cfg80211_internal_bss *bss = NULL; + int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); + u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); - wdev_lock(wdev); - - status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); + trace_cfg80211_send_rx_assoc(dev, bss); /* * This is a bit of a hack, we don't notify userspace of @@ -73,275 +37,142 @@ void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len) * and got a reject -- we only try again with an assoc * frame instead of reassoc. */ - if (status_code != WLAN_STATUS_SUCCESS && wdev->conn && - cfg80211_sme_failed_reassoc(wdev)) - goto out; - - nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL); - - if (status_code == WLAN_STATUS_SUCCESS) { - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (!wdev->auth_bsses[i]) - continue; - if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid, - ETH_ALEN) == 0) { - bss = wdev->auth_bsses[i]; - wdev->auth_bsses[i] = NULL; - /* additional reference to drop hold */ - cfg80211_ref_bss(bss); - break; - } - } - - /* - * We might be coming here because the driver reported - * a successful association at the same time as the - * user requested a deauth. In that case, we will have - * removed the BSS from the auth_bsses list due to the - * deauth request when the assoc response makes it. If - * the two code paths acquire the lock the other way - * around, that's just the standard situation of a - * deauth being requested while connected. - */ - if (!bss) - goto out; - } else if (wdev->conn) { - cfg80211_sme_failed_assoc(wdev); - /* - * do not call connect_result() now because the - * sme will schedule work that does it later. - */ - goto out; - } - - if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) { - /* - * This is for the userspace SME, the CONNECTING - * state will be changed to CONNECTED by - * __cfg80211_connect_result() below. - */ - wdev->sme_state = CFG80211_SME_CONNECTING; + if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) { + cfg80211_unhold_bss(bss_from_pub(bss)); + cfg80211_put_bss(wiphy, bss); + return; } - /* this consumes one bss reference (unless bss is NULL) */ + nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL); + /* update current_bss etc., consumes the bss reference */ __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs, status_code, - status_code == WLAN_STATUS_SUCCESS, - bss ? &bss->pub : NULL); - /* drop hold now, and also reference acquired above */ - if (bss) { - cfg80211_unhold_bss(bss); - cfg80211_put_bss(&bss->pub); - } + status_code == WLAN_STATUS_SUCCESS, bss); +} +EXPORT_SYMBOL(cfg80211_rx_assoc_resp); - out: - wdev_unlock(wdev); +static void cfg80211_process_auth(struct wireless_dev *wdev, + const u8 *buf, size_t len) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL); + cfg80211_sme_rx_auth(wdev, buf, len); } -EXPORT_SYMBOL(cfg80211_send_rx_assoc); -void __cfg80211_send_deauth(struct net_device *dev, - const u8 *buf, size_t len) +static void cfg80211_process_deauth(struct wireless_dev *wdev, + const u8 *buf, size_t len) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - struct wiphy *wiphy = wdev->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; const u8 *bssid = mgmt->bssid; - int i; - - ASSERT_WDEV_LOCK(wdev); + u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); + bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); - nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL); + nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL); - if (wdev->current_bss && - memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { - cfg80211_unhold_bss(wdev->current_bss); - cfg80211_put_bss(&wdev->current_bss->pub); - wdev->current_bss = NULL; - } else for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (wdev->auth_bsses[i] && - memcmp(wdev->auth_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) { - cfg80211_unhold_bss(wdev->auth_bsses[i]); - cfg80211_put_bss(&wdev->auth_bsses[i]->pub); - wdev->auth_bsses[i] = NULL; - break; - } - if (wdev->authtry_bsses[i] && - memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) { - cfg80211_unhold_bss(wdev->authtry_bsses[i]); - cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); - wdev->authtry_bsses[i] = NULL; - break; - } - } - - if (wdev->sme_state == CFG80211_SME_CONNECTED) { - u16 reason_code; - bool from_ap; - - reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); - - from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0; - __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); - } else if (wdev->sme_state == CFG80211_SME_CONNECTING) { - __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, - WLAN_STATUS_UNSPECIFIED_FAILURE, - false, NULL); - } -} -EXPORT_SYMBOL(__cfg80211_send_deauth); - -void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len) -{ - struct wireless_dev *wdev = dev->ieee80211_ptr; + if (!wdev->current_bss || + !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) + return; - wdev_lock(wdev); - __cfg80211_send_deauth(dev, buf, len); - wdev_unlock(wdev); + __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); + cfg80211_sme_deauth(wdev); } -EXPORT_SYMBOL(cfg80211_send_deauth); -void __cfg80211_send_disassoc(struct net_device *dev, - const u8 *buf, size_t len) +static void cfg80211_process_disassoc(struct wireless_dev *wdev, + const u8 *buf, size_t len) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - struct wiphy *wiphy = wdev->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; const u8 *bssid = mgmt->bssid; - int i; - u16 reason_code; - bool from_ap; - bool done = false; - - ASSERT_WDEV_LOCK(wdev); + u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); + bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr); - nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL); + nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL); - if (wdev->sme_state != CFG80211_SME_CONNECTED) + if (WARN_ON(!wdev->current_bss || + !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) return; - if (wdev->current_bss && - memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (wdev->authtry_bsses[i] || wdev->auth_bsses[i]) - continue; - wdev->auth_bsses[i] = wdev->current_bss; - wdev->current_bss = NULL; - done = true; - cfg80211_sme_disassoc(dev, i); - break; - } - WARN_ON(!done); - } else - WARN_ON(1); - - - reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); - - from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0; - __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); + __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); + cfg80211_sme_disassoc(wdev); } -EXPORT_SYMBOL(__cfg80211_send_disassoc); -void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len) +void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; - - wdev_lock(wdev); - __cfg80211_send_disassoc(dev, buf, len); - wdev_unlock(wdev); -} -EXPORT_SYMBOL(cfg80211_send_disassoc); - -static void __cfg80211_auth_remove(struct wireless_dev *wdev, const u8 *addr) -{ - int i; - bool done = false; + struct ieee80211_mgmt *mgmt = (void *)buf; ASSERT_WDEV_LOCK(wdev); - for (i = 0; addr && i < MAX_AUTH_BSSES; i++) { - if (wdev->authtry_bsses[i] && - memcmp(wdev->authtry_bsses[i]->pub.bssid, - addr, ETH_ALEN) == 0) { - cfg80211_unhold_bss(wdev->authtry_bsses[i]); - cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); - wdev->authtry_bsses[i] = NULL; - done = true; - break; - } - } + trace_cfg80211_rx_mlme_mgmt(dev, buf, len); - WARN_ON(!done); -} + if (WARN_ON(len < 2)) + return; -void __cfg80211_auth_canceled(struct net_device *dev, const u8 *addr) -{ - __cfg80211_auth_remove(dev->ieee80211_ptr, addr); + if (ieee80211_is_auth(mgmt->frame_control)) + cfg80211_process_auth(wdev, buf, len); + else if (ieee80211_is_deauth(mgmt->frame_control)) + cfg80211_process_deauth(wdev, buf, len); + else if (ieee80211_is_disassoc(mgmt->frame_control)) + cfg80211_process_disassoc(wdev, buf, len); } -EXPORT_SYMBOL(__cfg80211_auth_canceled); +EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt); -void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr) +void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); - wdev_lock(wdev); + trace_cfg80211_send_auth_timeout(dev, addr); nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); - if (wdev->sme_state == CFG80211_SME_CONNECTING) - __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0, - WLAN_STATUS_UNSPECIFIED_FAILURE, - false, NULL); + cfg80211_sme_auth_timeout(wdev); +} +EXPORT_SYMBOL(cfg80211_auth_timeout); + +void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + + trace_cfg80211_send_assoc_timeout(dev, bss->bssid); - __cfg80211_auth_remove(wdev, addr); + nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL); + cfg80211_sme_assoc_timeout(wdev); - wdev_unlock(wdev); + cfg80211_unhold_bss(bss_from_pub(bss)); + cfg80211_put_bss(wiphy, bss); } -EXPORT_SYMBOL(cfg80211_send_auth_timeout); +EXPORT_SYMBOL(cfg80211_assoc_timeout); -void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr) +void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; - struct wiphy *wiphy = wdev->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); - int i; - bool done = false; - - wdev_lock(wdev); - - nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL); - if (wdev->sme_state == CFG80211_SME_CONNECTING) - __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0, - WLAN_STATUS_UNSPECIFIED_FAILURE, - false, NULL); - - for (i = 0; addr && i < MAX_AUTH_BSSES; i++) { - if (wdev->auth_bsses[i] && - memcmp(wdev->auth_bsses[i]->pub.bssid, - addr, ETH_ALEN) == 0) { - cfg80211_unhold_bss(wdev->auth_bsses[i]); - cfg80211_put_bss(&wdev->auth_bsses[i]->pub); - wdev->auth_bsses[i] = NULL; - done = true; - break; - } - } + struct ieee80211_mgmt *mgmt = (void *)buf; - WARN_ON(!done); + ASSERT_WDEV_LOCK(wdev); - wdev_unlock(wdev); + trace_cfg80211_tx_mlme_mgmt(dev, buf, len); + + if (WARN_ON(len < 2)) + return; + + if (ieee80211_is_deauth(mgmt->frame_control)) + cfg80211_process_deauth(wdev, buf, len); + else + cfg80211_process_disassoc(wdev, buf, len); } -EXPORT_SYMBOL(cfg80211_send_assoc_timeout); +EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt); void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, enum nl80211_key_type key_type, int key_id, const u8 *tsc, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; - struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); #ifdef CONFIG_CFG80211_WEXT union iwreq_data wrqu; char *buf = kmalloc(128, gfp); @@ -358,24 +189,34 @@ void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, } #endif + trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc); nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp); } EXPORT_SYMBOL(cfg80211_michael_mic_failure); /* some MLME handling for userspace SME */ -int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, - struct net_device *dev, - struct ieee80211_channel *chan, - enum nl80211_auth_type auth_type, - const u8 *bssid, - const u8 *ssid, int ssid_len, - const u8 *ie, int ie_len, - const u8 *key, int key_len, int key_idx) +int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct ieee80211_channel *chan, + enum nl80211_auth_type auth_type, + const u8 *bssid, + const u8 *ssid, int ssid_len, + const u8 *ie, int ie_len, + const u8 *key, int key_len, int key_idx, + const u8 *sae_data, int sae_data_len) { struct wireless_dev *wdev = dev->ieee80211_ptr; - struct cfg80211_auth_request req; - struct cfg80211_internal_bss *bss; - int i, err, slot = -1, nfree = 0; + struct cfg80211_auth_request req = { + .ie = ie, + .ie_len = ie_len, + .sae_data = sae_data, + .sae_data_len = sae_data_len, + .auth_type = auth_type, + .key = key, + .key_len = key_len, + .key_idx = key_idx, + }; + int err; ASSERT_WDEV_LOCK(wdev); @@ -384,303 +225,559 @@ int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, return -EINVAL; if (wdev->current_bss && - memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0) + ether_addr_equal(bssid, wdev->current_bss->pub.bssid)) return -EALREADY; - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (wdev->authtry_bsses[i] && - memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, - ETH_ALEN) == 0) - return -EALREADY; - if (wdev->auth_bsses[i] && - memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, - ETH_ALEN) == 0) - return -EALREADY; - } - - memset(&req, 0, sizeof(req)); - - req.ie = ie; - req.ie_len = ie_len; - req.auth_type = auth_type; req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); - req.key = key; - req.key_len = key_len; - req.key_idx = key_idx; if (!req.bss) return -ENOENT; - bss = bss_from_pub(req.bss); + err = rdev_auth(rdev, dev, &req); - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) { - slot = i; - nfree++; - } - } + cfg80211_put_bss(&rdev->wiphy, req.bss); + return err; +} - /* we need one free slot for disassoc and one for this auth */ - if (nfree < 2) { - err = -ENOSPC; - goto out; +/* Do a logical ht_capa &= ht_capa_mask. */ +void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa, + const struct ieee80211_ht_cap *ht_capa_mask) +{ + int i; + u8 *p1, *p2; + if (!ht_capa_mask) { + memset(ht_capa, 0, sizeof(*ht_capa)); + return; } - wdev->authtry_bsses[slot] = bss; - cfg80211_hold_bss(bss); + p1 = (u8*)(ht_capa); + p2 = (u8*)(ht_capa_mask); + for (i = 0; i<sizeof(*ht_capa); i++) + p1[i] &= p2[i]; +} - err = rdev->ops->auth(&rdev->wiphy, dev, &req); - if (err) { - wdev->authtry_bsses[slot] = NULL; - cfg80211_unhold_bss(bss); +/* Do a logical ht_capa &= ht_capa_mask. */ +void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa, + const struct ieee80211_vht_cap *vht_capa_mask) +{ + int i; + u8 *p1, *p2; + if (!vht_capa_mask) { + memset(vht_capa, 0, sizeof(*vht_capa)); + return; } - out: - if (err) - cfg80211_put_bss(req.bss); - return err; + p1 = (u8*)(vht_capa); + p2 = (u8*)(vht_capa_mask); + for (i = 0; i < sizeof(*vht_capa); i++) + p1[i] &= p2[i]; } -int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, - struct net_device *dev, struct ieee80211_channel *chan, - enum nl80211_auth_type auth_type, const u8 *bssid, - const u8 *ssid, int ssid_len, - const u8 *ie, int ie_len, - const u8 *key, int key_len, int key_idx) +int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct ieee80211_channel *chan, + const u8 *bssid, + const u8 *ssid, int ssid_len, + struct cfg80211_assoc_request *req) { + struct wireless_dev *wdev = dev->ieee80211_ptr; int err; - wdev_lock(dev->ieee80211_ptr); - err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid, - ssid, ssid_len, ie, ie_len, - key, key_len, key_idx); - wdev_unlock(dev->ieee80211_ptr); + ASSERT_WDEV_LOCK(wdev); + + if (wdev->current_bss && + (!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid, + req->prev_bssid))) + return -EALREADY; + + cfg80211_oper_and_ht_capa(&req->ht_capa_mask, + rdev->wiphy.ht_capa_mod_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) + return -ENOENT; + + err = rdev_assoc(rdev, dev, req); + if (!err) + cfg80211_hold_bss(bss_from_pub(req->bss)); + else + cfg80211_put_bss(&rdev->wiphy, req->bss); return err; } -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 *ssid, int ssid_len, - const u8 *ie, int ie_len, bool use_mfp, - struct cfg80211_crypto_settings *crypt) +int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, + struct net_device *dev, const u8 *bssid, + const u8 *ie, int ie_len, u16 reason, + bool local_state_change) { struct wireless_dev *wdev = dev->ieee80211_ptr; - struct cfg80211_assoc_request req; - struct cfg80211_internal_bss *bss; - int i, err, slot = -1; - bool was_connected = false; + struct cfg80211_deauth_request req = { + .bssid = bssid, + .reason_code = reason, + .ie = ie, + .ie_len = ie_len, + .local_state_change = local_state_change, + }; ASSERT_WDEV_LOCK(wdev); - memset(&req, 0, sizeof(req)); - - if (wdev->current_bss && prev_bssid && - memcmp(wdev->current_bss->pub.bssid, prev_bssid, ETH_ALEN) == 0) { - /* - * Trying to reassociate: Allow this to proceed and let the old - * association to be dropped when the new one is completed. - */ - if (wdev->sme_state == CFG80211_SME_CONNECTED) { - was_connected = true; - wdev->sme_state = CFG80211_SME_CONNECTING; - } - } else if (wdev->current_bss) - return -EALREADY; + if (local_state_change && + (!wdev->current_bss || + !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) + return 0; - 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.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; - } + return rdev_deauth(rdev, dev, &req); +} - bss = bss_from_pub(req.bss); +int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, + struct net_device *dev, const u8 *bssid, + const u8 *ie, int ie_len, u16 reason, + bool local_state_change) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_disassoc_request req = { + .reason_code = reason, + .local_state_change = local_state_change, + .ie = ie, + .ie_len = ie_len, + }; + int err; - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (bss == wdev->auth_bsses[i]) { - slot = i; + ASSERT_WDEV_LOCK(wdev); + + if (!wdev->current_bss) + return -ENOTCONN; + + if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) + req.bss = &wdev->current_bss->pub; + else + return -ENOTCONN; + + err = rdev_disassoc(rdev, dev, &req); + if (err) + return err; + + /* driver should have reported the disassoc */ + WARN_ON(wdev->current_bss); + return 0; +} + +void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, + struct net_device *dev) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + u8 bssid[ETH_ALEN]; + + ASSERT_WDEV_LOCK(wdev); + + if (!rdev->ops->deauth) + return; + + if (!wdev->current_bss) + return; + + memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN); + cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, + WLAN_REASON_DEAUTH_LEAVING, false); +} + +struct cfg80211_mgmt_registration { + struct list_head list; + + u32 nlportid; + + int match_len; + + __le16 frame_type; + + u8 match[]; +}; + +int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, + u16 frame_type, const u8 *match_data, + int match_len) +{ + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + struct cfg80211_mgmt_registration *reg, *nreg; + int err = 0; + u16 mgmt_type; + + if (!wdev->wiphy->mgmt_stypes) + return -EOPNOTSUPP; + + if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) + return -EINVAL; + + if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) + return -EINVAL; + + mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; + if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) + return -EINVAL; + + nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); + if (!nreg) + return -ENOMEM; + + spin_lock_bh(&wdev->mgmt_registrations_lock); + + list_for_each_entry(reg, &wdev->mgmt_registrations, list) { + int mlen = min(match_len, reg->match_len); + + if (frame_type != le16_to_cpu(reg->frame_type)) + continue; + + if (memcmp(reg->match, match_data, mlen) == 0) { + err = -EALREADY; break; } } - if (slot < 0) { - err = -ENOTCONN; + if (err) { + kfree(nreg); goto out; } - err = rdev->ops->assoc(&rdev->wiphy, dev, &req); + memcpy(nreg->match, match_data, match_len); + nreg->match_len = match_len; + nreg->nlportid = snd_portid; + nreg->frame_type = cpu_to_le16(frame_type); + list_add(&nreg->list, &wdev->mgmt_registrations); + + if (rdev->ops->mgmt_frame_register) + rdev_mgmt_frame_register(rdev, wdev, frame_type, true); + out: - if (err && was_connected) - wdev->sme_state = CFG80211_SME_CONNECTED; - /* still a reference in wdev->auth_bsses[slot] */ - cfg80211_put_bss(req.bss); + spin_unlock_bh(&wdev->mgmt_registrations_lock); + return err; } -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 *ssid, int ssid_len, - const u8 *ie, int ie_len, bool use_mfp, - struct cfg80211_crypto_settings *crypt) +void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - int err; + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + struct cfg80211_mgmt_registration *reg, *tmp; - wdev_lock(wdev); - err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid, - ssid, ssid_len, ie, ie_len, use_mfp, crypt); - wdev_unlock(wdev); + spin_lock_bh(&wdev->mgmt_registrations_lock); - return err; + list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { + if (reg->nlportid != nlportid) + continue; + + if (rdev->ops->mgmt_frame_register) { + u16 frame_type = le16_to_cpu(reg->frame_type); + + rdev_mgmt_frame_register(rdev, wdev, + frame_type, false); + } + + list_del(®->list); + kfree(reg); + } + + spin_unlock_bh(&wdev->mgmt_registrations_lock); + + if (nlportid && rdev->crit_proto_nlportid == nlportid) { + rdev->crit_proto_nlportid = 0; + rdev_crit_proto_stop(rdev, wdev); + } + + if (nlportid == wdev->ap_unexpected_nlportid) + wdev->ap_unexpected_nlportid = 0; } -int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, - struct net_device *dev, const u8 *bssid, - const u8 *ie, int ie_len, u16 reason) +void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - struct cfg80211_deauth_request req; - int i; + struct cfg80211_mgmt_registration *reg, *tmp; - ASSERT_WDEV_LOCK(wdev); + spin_lock_bh(&wdev->mgmt_registrations_lock); - memset(&req, 0, sizeof(req)); - req.reason_code = reason; - req.ie = ie; - req.ie_len = ie_len; - if (wdev->current_bss && - memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { - req.bss = &wdev->current_bss->pub; - } else for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (wdev->auth_bsses[i] && - memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) { - req.bss = &wdev->auth_bsses[i]->pub; + list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { + list_del(®->list); + kfree(reg); + } + + spin_unlock_bh(&wdev->mgmt_registrations_lock); +} + +int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev, + struct wireless_dev *wdev, + struct cfg80211_mgmt_tx_params *params, u64 *cookie) +{ + const struct ieee80211_mgmt *mgmt; + u16 stype; + + if (!wdev->wiphy->mgmt_stypes) + return -EOPNOTSUPP; + + if (!rdev->ops->mgmt_tx) + return -EOPNOTSUPP; + + if (params->len < 24 + 1) + return -EINVAL; + + mgmt = (const struct ieee80211_mgmt *)params->buf; + + if (!ieee80211_is_mgmt(mgmt->frame_control)) + return -EINVAL; + + stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE; + if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4))) + return -EINVAL; + + if (ieee80211_is_action(mgmt->frame_control) && + mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) { + int err = 0; + + wdev_lock(wdev); + + switch (wdev->iftype) { + case NL80211_IFTYPE_ADHOC: + case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_P2P_CLIENT: + if (!wdev->current_bss) { + err = -ENOTCONN; + break; + } + + if (!ether_addr_equal(wdev->current_bss->pub.bssid, + mgmt->bssid)) { + err = -ENOTCONN; + break; + } + + /* + * check for IBSS DA must be done by driver as + * cfg80211 doesn't track the stations + */ + if (wdev->iftype == NL80211_IFTYPE_ADHOC) + break; + + /* for station, check that DA is the AP */ + if (!ether_addr_equal(wdev->current_bss->pub.bssid, + mgmt->da)) { + err = -ENOTCONN; + break; + } break; - } - if (wdev->authtry_bsses[i] && - memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) { - req.bss = &wdev->authtry_bsses[i]->pub; + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: + case NL80211_IFTYPE_AP_VLAN: + if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev))) + err = -EINVAL; + break; + case NL80211_IFTYPE_MESH_POINT: + if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) { + err = -EINVAL; + break; + } + /* + * check for mesh DA must be done by driver as + * cfg80211 doesn't track the stations + */ + break; + case NL80211_IFTYPE_P2P_DEVICE: + /* + * fall through, P2P device only supports + * public action frames + */ + default: + err = -EOPNOTSUPP; break; } + wdev_unlock(wdev); + + if (err) + return err; } - if (!req.bss) - return -ENOTCONN; + if (!ether_addr_equal(mgmt->sa, wdev_address(wdev))) + return -EINVAL; - return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); + /* Transmit the Action frame as requested by user space */ + return rdev_mgmt_tx(rdev, wdev, params, cookie); } -int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, - struct net_device *dev, const u8 *bssid, - const u8 *ie, int ie_len, u16 reason) +bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm, + const u8 *buf, size_t len, u32 flags, gfp_t gfp) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - int err; + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + struct cfg80211_mgmt_registration *reg; + const struct ieee80211_txrx_stypes *stypes = + &wiphy->mgmt_stypes[wdev->iftype]; + struct ieee80211_mgmt *mgmt = (void *)buf; + const u8 *data; + int data_len; + bool result = false; + __le16 ftype = mgmt->frame_control & + cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE); + u16 stype; + + trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm); + stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4; + + if (!(stypes->rx & BIT(stype))) { + trace_cfg80211_return_bool(false); + return false; + } - wdev_lock(wdev); - err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason); - wdev_unlock(wdev); + data = buf + ieee80211_hdrlen(mgmt->frame_control); + data_len = len - ieee80211_hdrlen(mgmt->frame_control); - return err; + spin_lock_bh(&wdev->mgmt_registrations_lock); + + list_for_each_entry(reg, &wdev->mgmt_registrations, list) { + if (reg->frame_type != ftype) + continue; + + if (reg->match_len > data_len) + continue; + + if (memcmp(reg->match, data, reg->match_len)) + continue; + + /* found match! */ + + /* Indicate the received Action frame to user space */ + if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, + freq, sig_mbm, + buf, len, flags, gfp)) + continue; + + result = true; + break; + } + + spin_unlock_bh(&wdev->mgmt_registrations_lock); + + trace_cfg80211_return_bool(result); + return result; } +EXPORT_SYMBOL(cfg80211_rx_mgmt); -static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, - struct net_device *dev, const u8 *bssid, - const u8 *ie, int ie_len, u16 reason) +void cfg80211_dfs_channels_update_work(struct work_struct *work) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - struct cfg80211_disassoc_request req; + struct delayed_work *delayed_work; + struct cfg80211_registered_device *rdev; + struct cfg80211_chan_def chandef; + struct ieee80211_supported_band *sband; + struct ieee80211_channel *c; + struct wiphy *wiphy; + bool check_again = false; + unsigned long timeout, next_time = 0; + int bandid, i; + + delayed_work = container_of(work, struct delayed_work, work); + rdev = container_of(delayed_work, struct cfg80211_registered_device, + dfs_update_channels_wk); + wiphy = &rdev->wiphy; + + rtnl_lock(); + for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) { + sband = wiphy->bands[bandid]; + if (!sband) + continue; + + for (i = 0; i < sband->n_channels; i++) { + c = &sband->channels[i]; + + if (c->dfs_state != NL80211_DFS_UNAVAILABLE) + continue; - ASSERT_WDEV_LOCK(wdev); + timeout = c->dfs_state_entered + msecs_to_jiffies( + IEEE80211_DFS_MIN_NOP_TIME_MS); - if (wdev->sme_state != CFG80211_SME_CONNECTED) - return -ENOTCONN; + if (time_after_eq(jiffies, timeout)) { + c->dfs_state = NL80211_DFS_USABLE; + c->dfs_state_entered = jiffies; - if (WARN_ON(!wdev->current_bss)) - return -ENOTCONN; + cfg80211_chandef_create(&chandef, c, + NL80211_CHAN_NO_HT); - memset(&req, 0, sizeof(req)); - req.reason_code = reason; - req.ie = ie; - req.ie_len = ie_len; - if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) - req.bss = &wdev->current_bss->pub; - else - return -ENOTCONN; + nl80211_radar_notify(rdev, &chandef, + NL80211_RADAR_NOP_FINISHED, + NULL, GFP_ATOMIC); + continue; + } - return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev); + if (!check_again) + next_time = timeout - jiffies; + else + next_time = min(next_time, timeout - jiffies); + check_again = true; + } + } + rtnl_unlock(); + + /* reschedule if there are other channels waiting to be cleared again */ + if (check_again) + queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, + next_time); } -int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, - struct net_device *dev, const u8 *bssid, - const u8 *ie, int ie_len, u16 reason) + +void cfg80211_radar_event(struct wiphy *wiphy, + struct cfg80211_chan_def *chandef, + gfp_t gfp) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - int err; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + unsigned long timeout; - wdev_lock(wdev); - err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason); - wdev_unlock(wdev); + trace_cfg80211_radar_event(wiphy, chandef); - return err; + /* only set the chandef supplied channel to unavailable, in + * case the radar is detected on only one of multiple channels + * spanned by the chandef. + */ + cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE); + + timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS); + queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, + timeout); + + nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp); } +EXPORT_SYMBOL(cfg80211_radar_event); -void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, - struct net_device *dev) +void cfg80211_cac_event(struct net_device *netdev, + const struct cfg80211_chan_def *chandef, + enum nl80211_radar_event event, gfp_t gfp) { - struct wireless_dev *wdev = dev->ieee80211_ptr; - struct cfg80211_deauth_request req; - int i; + struct wireless_dev *wdev = netdev->ieee80211_ptr; + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + unsigned long timeout; - ASSERT_WDEV_LOCK(wdev); + trace_cfg80211_cac_event(netdev, event); - if (!rdev->ops->deauth) + if (WARN_ON(!wdev->cac_started)) return; - memset(&req, 0, sizeof(req)); - req.reason_code = WLAN_REASON_DEAUTH_LEAVING; - req.ie = NULL; - req.ie_len = 0; + if (WARN_ON(!wdev->chandef.chan)) + return; - if (wdev->current_bss) { - req.bss = &wdev->current_bss->pub; - rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); - if (wdev->current_bss) { - cfg80211_unhold_bss(wdev->current_bss); - cfg80211_put_bss(&wdev->current_bss->pub); - wdev->current_bss = NULL; - } + switch (event) { + case NL80211_RADAR_CAC_FINISHED: + timeout = wdev->cac_start_time + + msecs_to_jiffies(wdev->cac_time_ms); + WARN_ON(!time_after_eq(jiffies, timeout)); + cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); + break; + case NL80211_RADAR_CAC_ABORTED: + break; + default: + WARN_ON(1); + return; } + wdev->cac_started = false; - for (i = 0; i < MAX_AUTH_BSSES; i++) { - if (wdev->auth_bsses[i]) { - req.bss = &wdev->auth_bsses[i]->pub; - rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); - if (wdev->auth_bsses[i]) { - cfg80211_unhold_bss(wdev->auth_bsses[i]); - cfg80211_put_bss(&wdev->auth_bsses[i]->pub); - wdev->auth_bsses[i] = NULL; - } - } - if (wdev->authtry_bsses[i]) { - req.bss = &wdev->authtry_bsses[i]->pub; - rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); - if (wdev->authtry_bsses[i]) { - cfg80211_unhold_bss(wdev->authtry_bsses[i]); - cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); - wdev->authtry_bsses[i] = NULL; - } - } - } + nl80211_radar_notify(rdev, chandef, event, netdev, gfp); } +EXPORT_SYMBOL(cfg80211_cac_event); |