| /* |
| * cfg80211 MLME SAP interface |
| * |
| * Copyright (c) 2009, Jouni Malinen <j@w1.fi> |
| * Copyright (c) 2015 Intel Deutschland GmbH |
| */ |
| |
| #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_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss, |
| const u8 *buf, size_t len, int uapsd_queues) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| struct wiphy *wiphy = wdev->wiphy; |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; |
| struct cfg80211_connect_resp_params cr; |
| |
| memset(&cr, 0, sizeof(cr)); |
| cr.status = (int)le16_to_cpu(mgmt->u.assoc_resp.status_code); |
| cr.bssid = mgmt->bssid; |
| cr.bss = bss; |
| cr.resp_ie = mgmt->u.assoc_resp.variable; |
| cr.resp_ie_len = |
| len - offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); |
| cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; |
| |
| trace_cfg80211_send_rx_assoc(dev, bss); |
| |
| /* |
| * 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 (cfg80211_sme_rx_assoc_resp(wdev, cr.status)) { |
| cfg80211_unhold_bss(bss_from_pub(bss)); |
| cfg80211_put_bss(wiphy, bss); |
| return; |
| } |
| |
| nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL, uapsd_queues); |
| /* update current_bss etc., consumes the bss reference */ |
| __cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS); |
| } |
| EXPORT_SYMBOL(cfg80211_rx_assoc_resp); |
| |
| 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); |
| } |
| |
| static void cfg80211_process_deauth(struct wireless_dev *wdev, |
| const u8 *buf, size_t len) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; |
| const u8 *bssid = mgmt->bssid; |
| 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, wdev->netdev, buf, len, GFP_KERNEL); |
| |
| if (!wdev->current_bss || |
| !ether_addr_equal(wdev->current_bss->pub.bssid, bssid)) |
| return; |
| |
| __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); |
| cfg80211_sme_deauth(wdev); |
| } |
| |
| static void cfg80211_process_disassoc(struct wireless_dev *wdev, |
| const u8 *buf, size_t len) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; |
| const u8 *bssid = mgmt->bssid; |
| 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, wdev->netdev, buf, len, GFP_KERNEL); |
| |
| if (WARN_ON(!wdev->current_bss || |
| !ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) |
| return; |
| |
| __cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap); |
| cfg80211_sme_disassoc(wdev); |
| } |
| |
| void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| struct ieee80211_mgmt *mgmt = (void *)buf; |
| |
| ASSERT_WDEV_LOCK(wdev); |
| |
| trace_cfg80211_rx_mlme_mgmt(dev, buf, len); |
| |
| if (WARN_ON(len < 2)) |
| return; |
| |
| 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_rx_mlme_mgmt); |
| |
| 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_rdev(wiphy); |
| |
| trace_cfg80211_send_auth_timeout(dev, addr); |
| |
| nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); |
| 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); |
| |
| nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL); |
| cfg80211_sme_assoc_timeout(wdev); |
| |
| cfg80211_unhold_bss(bss_from_pub(bss)); |
| cfg80211_put_bss(wiphy, bss); |
| } |
| EXPORT_SYMBOL(cfg80211_assoc_timeout); |
| |
| void cfg80211_abandon_assoc(struct net_device *dev, struct cfg80211_bss *bss) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| struct wiphy *wiphy = wdev->wiphy; |
| |
| cfg80211_sme_abandon_assoc(wdev); |
| |
| cfg80211_unhold_bss(bss_from_pub(bss)); |
| cfg80211_put_bss(wiphy, bss); |
| } |
| EXPORT_SYMBOL(cfg80211_abandon_assoc); |
| |
| void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| struct ieee80211_mgmt *mgmt = (void *)buf; |
| |
| ASSERT_WDEV_LOCK(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_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_rdev(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 *auth_data, int auth_data_len) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| struct cfg80211_auth_request req = { |
| .ie = ie, |
| .ie_len = ie_len, |
| .auth_data = auth_data, |
| .auth_data_len = auth_data_len, |
| .auth_type = auth_type, |
| .key = key, |
| .key_len = key_len, |
| .key_idx = key_idx, |
| }; |
| int err; |
| |
| ASSERT_WDEV_LOCK(wdev); |
| |
| if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) |
| if (!key || !key_len || key_idx < 0 || key_idx > 3) |
| return -EINVAL; |
| |
| if (wdev->current_bss && |
| ether_addr_equal(bssid, wdev->current_bss->pub.bssid)) |
| return -EALREADY; |
| |
| req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, |
| IEEE80211_BSS_TYPE_ESS, |
| IEEE80211_PRIVACY_ANY); |
| if (!req.bss) |
| return -ENOENT; |
| |
| err = rdev_auth(rdev, dev, &req); |
| |
| cfg80211_put_bss(&rdev->wiphy, req.bss); |
| 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; |
| |
| 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, |
| IEEE80211_BSS_TYPE_ESS, |
| IEEE80211_PRIVACY_ANY); |
| 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_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; |
| |
| if (ether_addr_equal(wdev->disconnect_bssid, bssid) || |
| (wdev->current_bss && |
| ether_addr_equal(wdev->current_bss->pub.bssid, bssid))) |
| wdev->conn_owner_nlportid = 0; |
| |
| return rdev_deauth(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; |
| struct cfg80211_disassoc_request req = { |
| .reason_code = reason, |
| .local_state_change = local_state_change, |
| .ie = ie, |
| .ie_len = ie_len, |
| }; |
| int err; |
| |
| 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; |
| struct wireless_dev *wdev; |
| |
| u32 nlportid; |
| |
| int match_len; |
| |
| __le16 frame_type; |
| |
| u8 match[]; |
| }; |
| |
| static void |
| cfg80211_process_mlme_unregistrations(struct cfg80211_registered_device *rdev) |
| { |
| struct cfg80211_mgmt_registration *reg; |
| |
| ASSERT_RTNL(); |
| |
| spin_lock_bh(&rdev->mlme_unreg_lock); |
| while ((reg = list_first_entry_or_null(&rdev->mlme_unreg, |
| struct cfg80211_mgmt_registration, |
| list))) { |
| list_del(®->list); |
| spin_unlock_bh(&rdev->mlme_unreg_lock); |
| |
| if (rdev->ops->mgmt_frame_register) { |
| u16 frame_type = le16_to_cpu(reg->frame_type); |
| |
| rdev_mgmt_frame_register(rdev, reg->wdev, |
| frame_type, false); |
| } |
| |
| kfree(reg); |
| |
| spin_lock_bh(&rdev->mlme_unreg_lock); |
| } |
| spin_unlock_bh(&rdev->mlme_unreg_lock); |
| } |
| |
| void cfg80211_mlme_unreg_wk(struct work_struct *wk) |
| { |
| struct cfg80211_registered_device *rdev; |
| |
| rdev = container_of(wk, struct cfg80211_registered_device, |
| mlme_unreg_wk); |
| |
| rtnl_lock(); |
| cfg80211_process_mlme_unregistrations(rdev); |
| rtnl_unlock(); |
| } |
| |
| 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 (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); |
| nreg->wdev = wdev; |
| list_add(&nreg->list, &wdev->mgmt_registrations); |
| spin_unlock_bh(&wdev->mgmt_registrations_lock); |
| |
| /* process all unregistrations to avoid driver confusion */ |
| cfg80211_process_mlme_unregistrations(rdev); |
| |
| if (rdev->ops->mgmt_frame_register) |
| rdev_mgmt_frame_register(rdev, wdev, frame_type, true); |
| |
| return 0; |
| |
| 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_rdev(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; |
| |
| list_del(®->list); |
| spin_lock(&rdev->mlme_unreg_lock); |
| list_add_tail(®->list, &rdev->mlme_unreg); |
| spin_unlock(&rdev->mlme_unreg_lock); |
| |
| schedule_work(&rdev->mlme_unreg_wk); |
| } |
| |
| 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_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| |
| spin_lock_bh(&wdev->mgmt_registrations_lock); |
| spin_lock(&rdev->mlme_unreg_lock); |
| list_splice_tail_init(&wdev->mgmt_registrations, &rdev->mlme_unreg); |
| spin_unlock(&rdev->mlme_unreg_lock); |
| spin_unlock_bh(&wdev->mgmt_registrations_lock); |
| |
| cfg80211_process_mlme_unregistrations(rdev); |
| } |
| |
| 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; |
| 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 |
| */ |
| case NL80211_IFTYPE_NAN: |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| wdev_unlock(wdev); |
| |
| if (err) |
| return err; |
| } |
| |
| if (!ether_addr_equal(mgmt->sa, wdev_address(wdev))) { |
| /* Allow random TA to be used with Public Action frames if the |
| * driver has indicated support for this. Otherwise, only allow |
| * the local address to be used. |
| */ |
| if (!ieee80211_is_action(mgmt->frame_control) || |
| mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) |
| return -EINVAL; |
| if (!wdev->current_bss && |
| !wiphy_ext_feature_isset( |
| &rdev->wiphy, |
| NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA)) |
| return -EINVAL; |
| if (wdev->current_bss && |
| !wiphy_ext_feature_isset( |
| &rdev->wiphy, |
| NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED)) |
| return -EINVAL; |
| } |
| |
| /* Transmit the Action frame as requested by user space */ |
| return rdev_mgmt_tx(rdev, wdev, params, cookie); |
| } |
| |
| bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm, |
| const u8 *buf, size_t len, u32 flags) |
| { |
| 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; |
| } |
| |
| 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, flags, GFP_ATOMIC)) |
| 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_sched_dfs_chan_update(struct cfg80211_registered_device *rdev) |
| { |
| cancel_delayed_work(&rdev->dfs_update_channels_wk); |
| queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0); |
| } |
| |
| void cfg80211_dfs_channels_update_work(struct work_struct *work) |
| { |
| struct delayed_work *delayed_work = to_delayed_work(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; |
| unsigned long time_dfs_update; |
| enum nl80211_radar_event radar_event; |
| int bandid, i; |
| |
| rdev = container_of(delayed_work, struct cfg80211_registered_device, |
| dfs_update_channels_wk); |
| wiphy = &rdev->wiphy; |
| |
| rtnl_lock(); |
| for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) { |
| sband = wiphy->bands[bandid]; |
| if (!sband) |
| continue; |
| |
| for (i = 0; i < sband->n_channels; i++) { |
| c = &sband->channels[i]; |
| |
| if (!(c->flags & IEEE80211_CHAN_RADAR)) |
| continue; |
| |
| if (c->dfs_state != NL80211_DFS_UNAVAILABLE && |
| c->dfs_state != NL80211_DFS_AVAILABLE) |
| continue; |
| |
| if (c->dfs_state == NL80211_DFS_UNAVAILABLE) { |
| time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS; |
| radar_event = NL80211_RADAR_NOP_FINISHED; |
| } else { |
| if (regulatory_pre_cac_allowed(wiphy) || |
| cfg80211_any_wiphy_oper_chan(wiphy, c)) |
| continue; |
| |
| time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS; |
| radar_event = NL80211_RADAR_PRE_CAC_EXPIRED; |
| } |
| |
| timeout = c->dfs_state_entered + |
| msecs_to_jiffies(time_dfs_update); |
| |
| if (time_after_eq(jiffies, timeout)) { |
| c->dfs_state = NL80211_DFS_USABLE; |
| c->dfs_state_entered = jiffies; |
| |
| cfg80211_chandef_create(&chandef, c, |
| NL80211_CHAN_NO_HT); |
| |
| nl80211_radar_notify(rdev, &chandef, |
| radar_event, NULL, |
| GFP_ATOMIC); |
| |
| regulatory_propagate_dfs_state(wiphy, &chandef, |
| c->dfs_state, |
| radar_event); |
| continue; |
| } |
| |
| 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); |
| } |
| |
| |
| void cfg80211_radar_event(struct wiphy *wiphy, |
| struct cfg80211_chan_def *chandef, |
| gfp_t gfp) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| 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); |
| |
| cfg80211_sched_dfs_chan_update(rdev); |
| |
| nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp); |
| |
| memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def)); |
| queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk); |
| } |
| EXPORT_SYMBOL(cfg80211_radar_event); |
| |
| 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 = netdev->ieee80211_ptr; |
| struct wiphy *wiphy = wdev->wiphy; |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| unsigned long timeout; |
| |
| trace_cfg80211_cac_event(netdev, event); |
| |
| if (WARN_ON(!wdev->cac_started)) |
| return; |
| |
| if (WARN_ON(!wdev->chandef.chan)) |
| return; |
| |
| 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); |
| memcpy(&rdev->cac_done_chandef, chandef, |
| sizeof(struct cfg80211_chan_def)); |
| queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); |
| cfg80211_sched_dfs_chan_update(rdev); |
| 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); |