/* * cfg80211 MLME SAP interface * * Copyright (c) 2009, Jouni Malinen */ #include #include #include #include #include #include #include #include #include #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(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(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(&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(&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_unprot_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); trace_cfg80211_send_unprot_deauth(dev); nl80211_send_unprot_deauth(rdev, dev, buf, len, GFP_ATOMIC); } EXPORT_SYMBOL(cfg80211_send_unprot_deauth); void cfg80211_send_unprot_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); trace_cfg80211_send_unprot_disassoc(dev); nl80211_send_unprot_disassoc(rdev, dev, buf, len, GFP_ATOMIC); } EXPORT_SYMBOL(cfg80211_send_unprot_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 CONFIG_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(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; iieee80211_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)) { /* * 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; 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, rdev->wiphy.ht_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, req.bss->channel, 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(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, u32 assoc_flags, struct ieee80211_ht_cap *ht_capa, struct ieee80211_ht_cap *ht_capa_mask) { 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); 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_ON(!wdev->current_bss)) 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(&wdev->current_bss->pub); wdev->current_bss = NULL; } } void cfg80211_ready_on_channel(struct wireless_dev *wdev, u64 cookie, struct ieee80211_channel *chan, unsigned int duration, gfp_t gfp) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_ready_on_channel(wdev, cookie, chan, duration); nl80211_send_remain_on_channel(rdev, wdev, cookie, chan, duration, gfp); } EXPORT_SYMBOL(cfg80211_ready_on_channel); void cfg80211_remain_on_channel_expired(struct wireless_dev *wdev, u64 cookie, struct ieee80211_channel *chan, gfp_t gfp) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_ready_on_channel_expired(wdev, cookie, chan); nl80211_send_remain_on_channel_cancel(rdev, wdev, cookie, chan, gfp); } EXPORT_SYMBOL(cfg80211_remain_on_channel_expired); void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr, struct station_info *sinfo, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_new_sta(dev, mac_addr, sinfo); nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp); } EXPORT_SYMBOL(cfg80211_new_sta); void cfg80211_del_sta(struct net_device *dev, const u8 *mac_addr, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_del_sta(dev, mac_addr); nl80211_send_sta_del_event(rdev, dev, mac_addr, gfp); } EXPORT_SYMBOL(cfg80211_del_sta); void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr, enum nl80211_connect_failed_reason reason, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); nl80211_send_conn_failed_event(rdev, dev, mac_addr, reason, gfp); } EXPORT_SYMBOL(cfg80211_conn_failed); 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 == 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_mgmt_tx_status(struct wireless_dev *wdev, u64 cookie, const u8 *buf, size_t len, bool ack, gfp_t gfp) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_mgmt_tx_status(wdev, cookie, ack); /* Indicate TX status of the Action frame to user space */ nl80211_send_mgmt_tx_status(rdev, wdev, cookie, buf, len, ack, gfp); } EXPORT_SYMBOL(cfg80211_mgmt_tx_status); void cfg80211_cqm_rssi_notify(struct net_device *dev, enum nl80211_cqm_rssi_threshold_event rssi_event, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_cqm_rssi_notify(dev, rssi_event); /* Indicate roaming trigger event to user space */ nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp); } EXPORT_SYMBOL(cfg80211_cqm_rssi_notify); void cfg80211_cqm_pktloss_notify(struct net_device *dev, const u8 *peer, u32 num_packets, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_cqm_pktloss_notify(dev, peer, num_packets); /* Indicate roaming trigger event to user space */ nl80211_send_cqm_pktloss_notify(rdev, dev, peer, num_packets, gfp); } EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify); void cfg80211_cqm_txe_notify(struct net_device *dev, const u8 *peer, u32 num_packets, u32 rate, u32 intvl, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); nl80211_send_cqm_txe_notify(rdev, dev, peer, num_packets, rate, intvl, gfp); } EXPORT_SYMBOL(cfg80211_cqm_txe_notify); void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid, const u8 *replay_ctr, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_gtk_rekey_notify(dev, bssid); nl80211_gtk_rekey_notify(rdev, dev, bssid, replay_ctr, gfp); } EXPORT_SYMBOL(cfg80211_gtk_rekey_notify); void cfg80211_pmksa_candidate_notify(struct net_device *dev, int index, const u8 *bssid, bool preauth, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); trace_cfg80211_pmksa_candidate_notify(dev, index, bssid, preauth); nl80211_pmksa_candidate_notify(rdev, dev, index, bssid, preauth, gfp); } EXPORT_SYMBOL(cfg80211_pmksa_candidate_notify); void cfg80211_ch_switch_notify(struct net_device *dev, int freq, enum nl80211_channel_type type) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct ieee80211_channel *chan; trace_cfg80211_ch_switch_notify(dev, freq, type); wdev_lock(wdev); if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && wdev->iftype != NL80211_IFTYPE_P2P_GO)) goto out; chan = rdev_freq_to_chan(rdev, freq, type); if (WARN_ON(!chan)) goto out; wdev->channel = chan; nl80211_ch_switch_notify(rdev, dev, freq, type, GFP_KERNEL); out: wdev_unlock(wdev); return; } EXPORT_SYMBOL(cfg80211_ch_switch_notify); bool cfg80211_rx_spurious_frame(struct net_device *dev, const u8 *addr, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; bool ret; trace_cfg80211_rx_spurious_frame(dev, addr); if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && wdev->iftype != NL80211_IFTYPE_P2P_GO)) { trace_cfg80211_return_bool(false); return false; } ret = nl80211_unexpected_frame(dev, addr, gfp); trace_cfg80211_return_bool(ret); return ret; } EXPORT_SYMBOL(cfg80211_rx_spurious_frame); bool cfg80211_rx_unexpected_4addr_frame(struct net_device *dev, const u8 *addr, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; bool ret; trace_cfg80211_rx_unexpected_4addr_frame(dev, addr); if (WARN_ON(wdev->iftype != NL80211_IFTYPE_AP && wdev->iftype != NL80211_IFTYPE_P2P_GO && wdev->iftype != NL80211_IFTYPE_AP_VLAN)) { trace_cfg80211_return_bool(false); return false; } ret = nl80211_unexpected_4addr_frame(dev, addr, gfp); trace_cfg80211_return_bool(ret); return ret; } EXPORT_SYMBOL(cfg80211_rx_unexpected_4addr_frame);