diff options
Diffstat (limited to 'net/wireless/mlme.c')
| -rw-r--r-- | net/wireless/mlme.c | 952 |
1 files changed, 952 insertions, 0 deletions
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c new file mode 100644 index 0000000..16345b9 --- /dev/null +++ b/net/wireless/mlme.c @@ -0,0 +1,952 @@ +/* + * cfg80211 MLME SAP interface + * + * Copyright (c) 2009, Jouni Malinen <j@w1.fi> + */ + +#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); + + trace_cfg80211_send_rx_auth(dev); + wdev_lock(wdev); + + 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, 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 ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; + u8 *ie = mgmt->u.assoc_resp.variable; + int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); + + trace_cfg80211_send_rx_assoc(dev, bss); + wdev_lock(wdev); + + status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); + + /* + * This is a bit of a hack, we don't notify userspace of + * a (re-)association reply if we tried to send a reassoc + * 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)) { + cfg80211_put_bss(wiphy, bss); + goto out; + } + + nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL); + + if (status_code != WLAN_STATUS_SUCCESS && wdev->conn) { + cfg80211_sme_failed_assoc(wdev); + /* + * do not call connect_result() now because the + * sme will schedule work that does it later. + */ + cfg80211_put_bss(wiphy, bss); + 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; + } + + /* this consumes the bss reference */ + __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs, + status_code, + status_code == WLAN_STATUS_SUCCESS, bss); + out: + wdev_unlock(wdev); +} +EXPORT_SYMBOL(cfg80211_send_rx_assoc); + +void __cfg80211_send_deauth(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; + const u8 *bssid = mgmt->bssid; + bool was_current = false; + + trace___cfg80211_send_deauth(dev); + ASSERT_WDEV_LOCK(wdev); + + if (wdev->current_bss && + ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) { + cfg80211_unhold_bss(wdev->current_bss); + cfg80211_put_bss(wiphy, &wdev->current_bss->pub); + wdev->current_bss = NULL; + was_current = true; + } + + nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL); + + if (wdev->sme_state == CFG80211_SME_CONNECTED && was_current) { + u16 reason_code; + bool from_ap; + + reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); + + from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr); + __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; + + wdev_lock(wdev); + __cfg80211_send_deauth(dev, buf, len); + wdev_unlock(wdev); +} +EXPORT_SYMBOL(cfg80211_send_deauth); + +void __cfg80211_send_disassoc(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; + const u8 *bssid = mgmt->bssid; + u16 reason_code; + bool from_ap; + + trace___cfg80211_send_disassoc(dev); + ASSERT_WDEV_LOCK(wdev); + + nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL); + + if (wdev->sme_state != CFG80211_SME_CONNECTED) + return; + + if (wdev->current_bss && + ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) { + cfg80211_sme_disassoc(dev, wdev->current_bss); + cfg80211_unhold_bss(wdev->current_bss); + cfg80211_put_bss(wiphy, &wdev->current_bss->pub); + wdev->current_bss = NULL; + } else + WARN_ON(1); + + + reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); + + from_ap = !ether_addr_equal(mgmt->sa, dev->dev_addr); + __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); +} +EXPORT_SYMBOL(__cfg80211_send_disassoc); + +void cfg80211_send_disassoc(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); + +void cfg80211_send_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); + + trace_cfg80211_send_auth_timeout(dev, addr); + wdev_lock(wdev); + + 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); + + wdev_unlock(wdev); +} +EXPORT_SYMBOL(cfg80211_send_auth_timeout); + +void cfg80211_send_assoc_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); + + trace_cfg80211_send_assoc_timeout(dev, addr); + 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); + + wdev_unlock(wdev); +} +EXPORT_SYMBOL(cfg80211_send_assoc_timeout); + +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); +#ifdef CPTCFG_CFG80211_WEXT + union iwreq_data wrqu; + char *buf = kmalloc(128, gfp); + + if (buf) { + sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" + "keyid=%d %scast addr=%pM)", key_id, + key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni", + addr); + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = strlen(buf); + wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); + kfree(buf); + } +#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, + const u8 *sae_data, int sae_data_len) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_auth_request req; + int err; + + ASSERT_WDEV_LOCK(wdev); + + if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) + if (!key || !key_len || key_idx < 0 || key_idx > 4) + return -EINVAL; + + if (wdev->current_bss && + ether_addr_equal(bssid, wdev->current_bss->pub.bssid)) + return -EALREADY; + + memset(&req, 0, sizeof(req)); + + req.ie = ie; + req.ie_len = ie_len; + req.sae_data = sae_data; + req.sae_data_len = sae_data_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; + + err = cfg80211_can_use_chan(rdev, wdev, req.bss->channel, + CHAN_MODE_SHARED); + if (err) + goto out; + + err = rdev_auth(rdev, dev, &req); + +out: + cfg80211_put_bss(&rdev->wiphy, req.bss); + return err; +} + +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) +{ + int err; + + mutex_lock(&rdev->devlist_mtx); + 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, + sae_data, sae_data_len); + wdev_unlock(dev->ieee80211_ptr); + mutex_unlock(&rdev->devlist_mtx); + + return err; +} + +/* 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; + } + + p1 = (u8*)(ht_capa); + p2 = (u8*)(ht_capa_mask); + for (i = 0; i<sizeof(*ht_capa); i++) + p1[i] &= p2[i]; +} + +/* 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; + } + + p1 = (u8*)(vht_capa); + p2 = (u8*)(vht_capa_mask); + for (i = 0; i < sizeof(*vht_capa); i++) + p1[i] &= p2[i]; +} + +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; + bool was_connected = false; + + ASSERT_WDEV_LOCK(wdev); + + 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. + */ + if (wdev->sme_state == CFG80211_SME_CONNECTED) { + was_connected = true; + wdev->sme_state = CFG80211_SME_CONNECTING; + } + } else if (wdev->current_bss) + 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) { + if (was_connected) + wdev->sme_state = CFG80211_SME_CONNECTED; + return -ENOENT; + } + + err = cfg80211_can_use_chan(rdev, wdev, chan, CHAN_MODE_SHARED); + if (err) + goto out; + + 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); + } + + return err; +} + +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; + + mutex_lock(&rdev->devlist_mtx); + wdev_lock(wdev); + err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, + ssid, ssid_len, req); + wdev_unlock(wdev); + mutex_unlock(&rdev->devlist_mtx); + + return err; +} + +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_deauth_request req = { + .bssid = bssid, + .reason_code = reason, + .ie = ie, + .ie_len = ie_len, + .local_state_change = local_state_change, + }; + + ASSERT_WDEV_LOCK(wdev); + + if (local_state_change && (!wdev->current_bss || + !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) + return 0; + + return rdev_deauth(rdev, dev, &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, + bool local_state_change) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + int err; + + wdev_lock(wdev); + err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason, + local_state_change); + wdev_unlock(wdev); + + return err; +} + +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, + bool local_state_change) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_disassoc_request req; + + ASSERT_WDEV_LOCK(wdev); + + if (wdev->sme_state != CFG80211_SME_CONNECTED) + return -ENOTCONN; + + if (WARN(!wdev->current_bss, "sme_state=%d\n", wdev->sme_state)) + return -ENOTCONN; + + memset(&req, 0, sizeof(req)); + req.reason_code = reason; + req.local_state_change = local_state_change; + req.ie = ie; + req.ie_len = ie_len; + if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) + req.bss = &wdev->current_bss->pub; + else + return -ENOTCONN; + + return rdev_disassoc(rdev, dev, &req); +} + +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; + int err; + + wdev_lock(wdev); + err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason, + local_state_change); + wdev_unlock(wdev); + + return err; +} + +void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, + struct net_device *dev) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_deauth_request req; + u8 bssid[ETH_ALEN]; + + ASSERT_WDEV_LOCK(wdev); + + if (!rdev->ops->deauth) + return; + + memset(&req, 0, sizeof(req)); + req.reason_code = WLAN_REASON_DEAUTH_LEAVING; + req.ie = NULL; + req.ie_len = 0; + + if (!wdev->current_bss) + return; + + memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN); + req.bssid = bssid; + rdev_deauth(rdev, dev, &req); + + if (wdev->current_bss) { + cfg80211_unhold_bss(wdev->current_bss); + cfg80211_put_bss(&rdev->wiphy, &wdev->current_bss->pub); + wdev->current_bss = NULL; + } +} + +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_dev(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 (err) { + kfree(nreg); + goto out; + } + + 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: + spin_unlock_bh(&wdev->mgmt_registrations_lock); + + return err; +} + +void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid) +{ + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_mgmt_registration *reg, *tmp; + + spin_lock_bh(&wdev->mgmt_registrations_lock); + + 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; +} + +void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev) +{ + struct cfg80211_mgmt_registration *reg, *tmp; + + spin_lock_bh(&wdev->mgmt_registrations_lock); + + 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 ieee80211_channel *chan, bool offchan, + unsigned int wait, const u8 *buf, size_t len, + bool no_cck, bool dont_wait_for_ack, u64 *cookie) +{ + const struct ieee80211_mgmt *mgmt; + u16 stype; + + if (!wdev->wiphy->mgmt_stypes) + return -EOPNOTSUPP; + + if (!rdev->ops->mgmt_tx) + return -EOPNOTSUPP; + + if (len < 24 + 1) + return -EINVAL; + + mgmt = (const struct ieee80211_mgmt *) 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; + 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 (!ether_addr_equal(mgmt->sa, wdev_address(wdev))) + return -EINVAL; + + /* Transmit the Action frame as requested by user space */ + return rdev_mgmt_tx(rdev, wdev, chan, offchan, + wait, buf, len, no_cck, dont_wait_for_ack, + cookie); +} + +bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm, + const u8 *buf, size_t len, gfp_t gfp) +{ + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_dev(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; + } + + data = buf + ieee80211_hdrlen(mgmt->frame_control); + data_len = len - ieee80211_hdrlen(mgmt->frame_control); + + 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, gfp)) + continue; + + result = true; + break; + } + + spin_unlock_bh(&wdev->mgmt_registrations_lock); + + trace_cfg80211_return_bool(result); + return result; +} +EXPORT_SYMBOL(cfg80211_rx_mgmt); + +void cfg80211_dfs_channels_update_work(struct work_struct *work) +{ + 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; + + mutex_lock(&cfg80211_mutex); + 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; + + timeout = c->dfs_state_entered + + IEEE80211_DFS_MIN_NOP_TIME_MS; + + if (time_after_eq(jiffies, timeout)) { + c->dfs_state = NL80211_DFS_USABLE; + cfg80211_chandef_create(&chandef, c, + NL80211_CHAN_NO_HT); + + nl80211_radar_notify(rdev, &chandef, + NL80211_RADAR_NOP_FINISHED, + NULL, GFP_ATOMIC); + continue; + } + + if (!check_again) + next_time = timeout - jiffies; + else + next_time = min(next_time, timeout - jiffies); + check_again = true; + } + } + mutex_unlock(&cfg80211_mutex); + + /* 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); +} + + +void cfg80211_radar_event(struct wiphy *wiphy, + struct cfg80211_chan_def *chandef, + gfp_t gfp) +{ + struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + unsigned long timeout; + + trace_cfg80211_radar_event(wiphy, chandef); + + /* 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_cac_event(struct net_device *netdev, + enum nl80211_radar_event event, gfp_t gfp) +{ + struct wireless_dev *wdev = netdev->ieee80211_ptr; + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); + struct cfg80211_chan_def chandef; + unsigned long timeout; + + trace_cfg80211_cac_event(netdev, event); + + if (WARN_ON(!wdev->cac_started)) + return; + + if (WARN_ON(!wdev->channel)) + return; + + cfg80211_chandef_create(&chandef, wdev->channel, NL80211_CHAN_NO_HT); + + switch (event) { + case NL80211_RADAR_CAC_FINISHED: + timeout = wdev->cac_start_time + + msecs_to_jiffies(IEEE80211_DFS_MIN_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; + + nl80211_radar_notify(rdev, &chandef, event, netdev, gfp); +} +EXPORT_SYMBOL(cfg80211_cac_event); |