| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * cfg80211 MLME SAP interface |
| * |
| * Copyright (c) 2009, Jouni Malinen <j@w1.fi> |
| * Copyright (c) 2015 Intel Deutschland GmbH |
| * Copyright (C) 2019-2020, 2022 Intel Corporation |
| */ |
| |
| #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_rx_assoc_resp *data) |
| { |
| 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 *)data->buf; |
| struct cfg80211_connect_resp_params cr = { |
| .timeout_reason = NL80211_TIMEOUT_UNSPECIFIED, |
| .req_ie = data->req_ies, |
| .req_ie_len = data->req_ies_len, |
| .resp_ie = mgmt->u.assoc_resp.variable, |
| .resp_ie_len = data->len - |
| offsetof(struct ieee80211_mgmt, |
| u.assoc_resp.variable), |
| .status = le16_to_cpu(mgmt->u.assoc_resp.status_code), |
| .ap_mld_addr = data->ap_mld_addr, |
| }; |
| unsigned int link_id; |
| |
| for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) { |
| cr.links[link_id].bss = data->links[link_id].bss; |
| if (!cr.links[link_id].bss) |
| continue; |
| cr.links[link_id].bssid = data->links[link_id].bss->bssid; |
| cr.links[link_id].addr = data->links[link_id].addr; |
| /* need to have local link addresses for MLO connections */ |
| WARN_ON(cr.ap_mld_addr && !cr.links[link_id].addr); |
| |
| BUG_ON(!cr.links[link_id].bss->channel); |
| |
| if (cr.links[link_id].bss->channel->band == NL80211_BAND_S1GHZ) { |
| WARN_ON(link_id); |
| cr.resp_ie = (u8 *)&mgmt->u.s1g_assoc_resp.variable; |
| cr.resp_ie_len = data->len - |
| offsetof(struct ieee80211_mgmt, |
| u.s1g_assoc_resp.variable); |
| } |
| |
| if (cr.ap_mld_addr) |
| cr.valid_links |= BIT(link_id); |
| } |
| |
| trace_cfg80211_send_rx_assoc(dev, data); |
| |
| /* |
| * 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)) { |
| for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) { |
| struct cfg80211_bss *bss = data->links[link_id].bss; |
| |
| if (!bss) |
| continue; |
| |
| cfg80211_unhold_bss(bss_from_pub(bss)); |
| cfg80211_put_bss(wiphy, bss); |
| } |
| return; |
| } |
| |
| nl80211_send_rx_assoc(rdev, dev, data); |
| /* 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, |
| bool reconnect) |
| { |
| 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, reconnect, GFP_KERNEL); |
| |
| if (!wdev->connected || !ether_addr_equal(wdev->u.client.connected_addr, 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, |
| bool reconnect) |
| { |
| 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, reconnect, |
| GFP_KERNEL); |
| |
| if (WARN_ON(!wdev->connected || |
| !ether_addr_equal(wdev->u.client.connected_addr, 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, false); |
| else if (ieee80211_is_disassoc(mgmt->frame_control)) |
| cfg80211_process_disassoc(wdev, buf, len, false); |
| } |
| 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_failure(struct net_device *dev, |
| struct cfg80211_assoc_failure *data) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| struct wiphy *wiphy = wdev->wiphy; |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| const u8 *addr = data->ap_mld_addr ?: data->bss[0]->bssid; |
| int i; |
| |
| trace_cfg80211_send_assoc_failure(dev, data); |
| |
| if (data->timeout) { |
| nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL); |
| cfg80211_sme_assoc_timeout(wdev); |
| } else { |
| cfg80211_sme_abandon_assoc(wdev); |
| } |
| |
| for (i = 0; i < ARRAY_SIZE(data->bss); i++) { |
| struct cfg80211_bss *bss = data->bss[i]; |
| |
| if (!bss) |
| continue; |
| |
| cfg80211_unhold_bss(bss_from_pub(bss)); |
| cfg80211_put_bss(wiphy, bss); |
| } |
| } |
| EXPORT_SYMBOL(cfg80211_assoc_failure); |
| |
| void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len, |
| bool reconnect) |
| { |
| 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, reconnect); |
| |
| if (WARN_ON(len < 2)) |
| return; |
| |
| if (ieee80211_is_deauth(mgmt->frame_control)) |
| cfg80211_process_deauth(wdev, buf, len, reconnect); |
| else |
| cfg80211_process_disassoc(wdev, buf, len, reconnect); |
| } |
| 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 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 cfg80211_auth_request *req) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| |
| ASSERT_WDEV_LOCK(wdev); |
| |
| if (!req->bss) |
| return -ENOENT; |
| |
| if (req->link_id >= 0 && |
| !(wdev->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) |
| return -EINVAL; |
| |
| if (req->auth_type == NL80211_AUTHTYPE_SHARED_KEY) { |
| if (!req->key || !req->key_len || |
| req->key_idx < 0 || req->key_idx > 3) |
| return -EINVAL; |
| } |
| |
| if (wdev->connected && |
| ether_addr_equal(req->bss->bssid, wdev->u.client.connected_addr)) |
| return -EALREADY; |
| |
| return rdev_auth(rdev, dev, req); |
| } |
| |
| /* 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 vht_capa &= vht_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]; |
| } |
| |
| /* Note: caller must cfg80211_put_bss() regardless of result */ |
| int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, |
| struct net_device *dev, |
| struct cfg80211_assoc_request *req) |
| { |
| struct wireless_dev *wdev = dev->ieee80211_ptr; |
| int err, i, j; |
| |
| ASSERT_WDEV_LOCK(wdev); |
| |
| for (i = 1; i < ARRAY_SIZE(req->links); i++) { |
| if (!req->links[i].bss) |
| continue; |
| for (j = 0; j < i; j++) { |
| if (req->links[i].bss == req->links[j].bss) |
| return -EINVAL; |
| } |
| } |
| |
| if (wdev->connected && |
| (!req->prev_bssid || |
| !ether_addr_equal(wdev->u.client.connected_addr, 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); |
| |
| err = rdev_assoc(rdev, dev, req); |
| if (!err) { |
| int link_id; |
| |
| if (req->bss) { |
| cfg80211_ref_bss(&rdev->wiphy, req->bss); |
| cfg80211_hold_bss(bss_from_pub(req->bss)); |
| } |
| |
| for (link_id = 0; link_id < ARRAY_SIZE(req->links); link_id++) { |
| if (!req->links[link_id].bss) |
| continue; |
| cfg80211_ref_bss(&rdev->wiphy, req->links[link_id].bss); |
| cfg80211_hold_bss(bss_from_pub(req->links[link_id].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->connected || |
| !ether_addr_equal(wdev->u.client.connected_addr, bssid))) |
| return 0; |
| |
| if (ether_addr_equal(wdev->disconnect_bssid, bssid) || |
| (wdev->connected && |
| ether_addr_equal(wdev->u.client.connected_addr, 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 *ap_addr, |
| 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, |
| .ap_addr = ap_addr, |
| }; |
| int err; |
| |
| ASSERT_WDEV_LOCK(wdev); |
| |
| if (!wdev->connected) |
| return -ENOTCONN; |
| |
| if (memcmp(wdev->u.client.connected_addr, ap_addr, ETH_ALEN)) |
| return -ENOTCONN; |
| |
| err = rdev_disassoc(rdev, dev, &req); |
| if (err) |
| return err; |
| |
| /* driver should have reported the disassoc */ |
| WARN_ON(wdev->connected); |
| 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->connected) |
| return; |
| |
| memcpy(bssid, wdev->u.client.connected_addr, 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; |
| |
| bool multicast_rx; |
| |
| u8 match[]; |
| }; |
| |
| static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| struct wireless_dev *tmp; |
| struct cfg80211_mgmt_registration *reg; |
| struct mgmt_frame_regs upd = {}; |
| |
| lockdep_assert_held(&rdev->wiphy.mtx); |
| |
| spin_lock_bh(&rdev->mgmt_registrations_lock); |
| if (!wdev->mgmt_registrations_need_update) { |
| spin_unlock_bh(&rdev->mgmt_registrations_lock); |
| return; |
| } |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) { |
| list_for_each_entry(reg, &tmp->mgmt_registrations, list) { |
| u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4); |
| u32 mcast_mask = 0; |
| |
| if (reg->multicast_rx) |
| mcast_mask = mask; |
| |
| upd.global_stypes |= mask; |
| upd.global_mcast_stypes |= mcast_mask; |
| |
| if (tmp == wdev) { |
| upd.interface_stypes |= mask; |
| upd.interface_mcast_stypes |= mcast_mask; |
| } |
| } |
| } |
| rcu_read_unlock(); |
| |
| wdev->mgmt_registrations_need_update = 0; |
| spin_unlock_bh(&rdev->mgmt_registrations_lock); |
| |
| rdev_update_mgmt_frame_registrations(rdev, wdev, &upd); |
| } |
| |
| void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk) |
| { |
| struct cfg80211_registered_device *rdev; |
| struct wireless_dev *wdev; |
| |
| rdev = container_of(wk, struct cfg80211_registered_device, |
| mgmt_registrations_update_wk); |
| |
| wiphy_lock(&rdev->wiphy); |
| list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
| cfg80211_mgmt_registrations_update(wdev); |
| wiphy_unlock(&rdev->wiphy); |
| } |
| |
| int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid, |
| u16 frame_type, const u8 *match_data, |
| int match_len, bool multicast_rx, |
| struct netlink_ext_ack *extack) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
| struct cfg80211_mgmt_registration *reg, *nreg; |
| int err = 0; |
| u16 mgmt_type; |
| bool update_multicast = false; |
| |
| if (!wdev->wiphy->mgmt_stypes) |
| return -EOPNOTSUPP; |
| |
| if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) { |
| NL_SET_ERR_MSG(extack, "frame type not management"); |
| return -EINVAL; |
| } |
| |
| if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) { |
| NL_SET_ERR_MSG(extack, "Invalid frame type"); |
| return -EINVAL; |
| } |
| |
| mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4; |
| if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) { |
| NL_SET_ERR_MSG(extack, |
| "Registration to specific type not supported"); |
| return -EINVAL; |
| } |
| |
| /* |
| * To support Pre Association Security Negotiation (PASN), registration |
| * for authentication frames should be supported. However, as some |
| * versions of the user space daemons wrongly register to all types of |
| * authentication frames (which might result in unexpected behavior) |
| * allow such registration if the request is for a specific |
| * authentication algorithm number. |
| */ |
| if (wdev->iftype == NL80211_IFTYPE_STATION && |
| (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH && |
| !(match_data && match_len >= 2)) { |
| NL_SET_ERR_MSG(extack, |
| "Authentication algorithm number required"); |
| return -EINVAL; |
| } |
| |
| nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); |
| if (!nreg) |
| return -ENOMEM; |
| |
| spin_lock_bh(&rdev->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) { |
| if (reg->multicast_rx != multicast_rx) { |
| update_multicast = true; |
| reg->multicast_rx = multicast_rx; |
| break; |
| } |
| NL_SET_ERR_MSG(extack, "Match already configured"); |
| err = -EALREADY; |
| break; |
| } |
| } |
| |
| if (err) |
| goto out; |
| |
| if (update_multicast) { |
| kfree(nreg); |
| } else { |
| 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; |
| nreg->multicast_rx = multicast_rx; |
| list_add(&nreg->list, &wdev->mgmt_registrations); |
| } |
| wdev->mgmt_registrations_need_update = 1; |
| spin_unlock_bh(&rdev->mgmt_registrations_lock); |
| |
| cfg80211_mgmt_registrations_update(wdev); |
| |
| return 0; |
| |
| out: |
| kfree(nreg); |
| spin_unlock_bh(&rdev->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(&rdev->mgmt_registrations_lock); |
| |
| list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { |
| if (reg->nlportid != nlportid) |
| continue; |
| |
| list_del(®->list); |
| kfree(reg); |
| |
| wdev->mgmt_registrations_need_update = 1; |
| schedule_work(&rdev->mgmt_registrations_update_wk); |
| } |
| |
| spin_unlock_bh(&rdev->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); |
| struct cfg80211_mgmt_registration *reg, *tmp; |
| |
| spin_lock_bh(&rdev->mgmt_registrations_lock); |
| list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) { |
| list_del(®->list); |
| kfree(reg); |
| } |
| wdev->mgmt_registrations_need_update = 1; |
| spin_unlock_bh(&rdev->mgmt_registrations_lock); |
| |
| cfg80211_mgmt_registrations_update(wdev); |
| } |
| |
| static bool cfg80211_allowed_address(struct wireless_dev *wdev, const u8 *addr) |
| { |
| int i; |
| |
| for_each_valid_link(wdev, i) { |
| if (ether_addr_equal(addr, wdev->links[i].addr)) |
| return true; |
| } |
| |
| return ether_addr_equal(addr, wdev_address(wdev)); |
| } |
| |
| 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: |
| /* |
| * check for IBSS DA must be done by driver as |
| * cfg80211 doesn't track the stations |
| */ |
| if (!wdev->u.ibss.current_bss || |
| !ether_addr_equal(wdev->u.ibss.current_bss->pub.bssid, |
| mgmt->bssid)) { |
| err = -ENOTCONN; |
| break; |
| } |
| break; |
| case NL80211_IFTYPE_STATION: |
| case NL80211_IFTYPE_P2P_CLIENT: |
| if (!wdev->connected) { |
| err = -ENOTCONN; |
| break; |
| } |
| |
| /* FIXME: MLD may address this differently */ |
| |
| if (!ether_addr_equal(wdev->u.client.connected_addr, |
| mgmt->bssid)) { |
| err = -ENOTCONN; |
| break; |
| } |
| |
| /* for station, check that DA is the AP */ |
| if (!ether_addr_equal(wdev->u.client.connected_addr, |
| 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 (!cfg80211_allowed_address(wdev, mgmt->sa)) { |
| /* 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->connected && |
| !wiphy_ext_feature_isset( |
| &rdev->wiphy, |
| NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA)) |
| return -EINVAL; |
| if (wdev->connected && |
| !wiphy_ext_feature_isset( |
| &rdev->wiphy, |
| NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED)) |
| return -EINVAL; |
| } |
| |
| /* Transmit the management frame as requested by user space */ |
| return rdev_mgmt_tx(rdev, wdev, params, cookie); |
| } |
| |
| bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev, |
| struct cfg80211_rx_info *info) |
| { |
| 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 *)info->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, info); |
| stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4; |
| |
| if (!(stypes->rx & BIT(stype))) { |
| trace_cfg80211_return_bool(false); |
| return false; |
| } |
| |
| data = info->buf + ieee80211_hdrlen(mgmt->frame_control); |
| data_len = info->len - ieee80211_hdrlen(mgmt->frame_control); |
| |
| spin_lock_bh(&rdev->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, info, |
| GFP_ATOMIC)) |
| continue; |
| |
| result = true; |
| break; |
| } |
| |
| spin_unlock_bh(&rdev->mgmt_registrations_lock); |
| |
| trace_cfg80211_return_bool(result); |
| return result; |
| } |
| EXPORT_SYMBOL(cfg80211_rx_mgmt_ext); |
| |
| 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, |
| bool offchan, gfp_t gfp) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| trace_cfg80211_radar_event(wiphy, chandef, offchan); |
| |
| /* 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); |
| |
| if (offchan) |
| queue_work(cfg80211_wq, &rdev->background_cac_abort_wk); |
| |
| 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; |
| |
| /* not yet supported */ |
| if (wdev->valid_links) |
| return; |
| |
| trace_cfg80211_cac_event(netdev, event); |
| |
| if (WARN_ON(!wdev->cac_started && event != NL80211_RADAR_CAC_STARTED)) |
| 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); |
| fallthrough; |
| case NL80211_RADAR_CAC_ABORTED: |
| wdev->cac_started = false; |
| break; |
| case NL80211_RADAR_CAC_STARTED: |
| wdev->cac_started = true; |
| break; |
| default: |
| WARN_ON(1); |
| return; |
| } |
| |
| nl80211_radar_notify(rdev, chandef, event, netdev, gfp); |
| } |
| EXPORT_SYMBOL(cfg80211_cac_event); |
| |
| static void |
| __cfg80211_background_cac_event(struct cfg80211_registered_device *rdev, |
| struct wireless_dev *wdev, |
| const struct cfg80211_chan_def *chandef, |
| enum nl80211_radar_event event) |
| { |
| struct wiphy *wiphy = &rdev->wiphy; |
| struct net_device *netdev; |
| |
| lockdep_assert_wiphy(&rdev->wiphy); |
| |
| if (!cfg80211_chandef_valid(chandef)) |
| return; |
| |
| if (!rdev->background_radar_wdev) |
| return; |
| |
| switch (event) { |
| case NL80211_RADAR_CAC_FINISHED: |
| cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE); |
| memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef)); |
| queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk); |
| cfg80211_sched_dfs_chan_update(rdev); |
| wdev = rdev->background_radar_wdev; |
| break; |
| case NL80211_RADAR_CAC_ABORTED: |
| if (!cancel_delayed_work(&rdev->background_cac_done_wk)) |
| return; |
| wdev = rdev->background_radar_wdev; |
| break; |
| case NL80211_RADAR_CAC_STARTED: |
| break; |
| default: |
| return; |
| } |
| |
| netdev = wdev ? wdev->netdev : NULL; |
| nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL); |
| } |
| |
| static void |
| cfg80211_background_cac_event(struct cfg80211_registered_device *rdev, |
| const struct cfg80211_chan_def *chandef, |
| enum nl80211_radar_event event) |
| { |
| wiphy_lock(&rdev->wiphy); |
| __cfg80211_background_cac_event(rdev, rdev->background_radar_wdev, |
| chandef, event); |
| wiphy_unlock(&rdev->wiphy); |
| } |
| |
| void cfg80211_background_cac_done_wk(struct work_struct *work) |
| { |
| struct delayed_work *delayed_work = to_delayed_work(work); |
| struct cfg80211_registered_device *rdev; |
| |
| rdev = container_of(delayed_work, struct cfg80211_registered_device, |
| background_cac_done_wk); |
| cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef, |
| NL80211_RADAR_CAC_FINISHED); |
| } |
| |
| void cfg80211_background_cac_abort_wk(struct work_struct *work) |
| { |
| struct cfg80211_registered_device *rdev; |
| |
| rdev = container_of(work, struct cfg80211_registered_device, |
| background_cac_abort_wk); |
| cfg80211_background_cac_event(rdev, &rdev->background_radar_chandef, |
| NL80211_RADAR_CAC_ABORTED); |
| } |
| |
| void cfg80211_background_cac_abort(struct wiphy *wiphy) |
| { |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| queue_work(cfg80211_wq, &rdev->background_cac_abort_wk); |
| } |
| EXPORT_SYMBOL(cfg80211_background_cac_abort); |
| |
| int |
| cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev, |
| struct wireless_dev *wdev, |
| struct cfg80211_chan_def *chandef) |
| { |
| unsigned int cac_time_ms; |
| int err; |
| |
| lockdep_assert_wiphy(&rdev->wiphy); |
| |
| if (!wiphy_ext_feature_isset(&rdev->wiphy, |
| NL80211_EXT_FEATURE_RADAR_BACKGROUND)) |
| return -EOPNOTSUPP; |
| |
| /* Offchannel chain already locked by another wdev */ |
| if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev) |
| return -EBUSY; |
| |
| /* CAC already in progress on the offchannel chain */ |
| if (rdev->background_radar_wdev == wdev && |
| delayed_work_pending(&rdev->background_cac_done_wk)) |
| return -EBUSY; |
| |
| err = rdev_set_radar_background(rdev, chandef); |
| if (err) |
| return err; |
| |
| cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef); |
| if (!cac_time_ms) |
| cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; |
| |
| rdev->background_radar_chandef = *chandef; |
| rdev->background_radar_wdev = wdev; /* Get offchain ownership */ |
| |
| __cfg80211_background_cac_event(rdev, wdev, chandef, |
| NL80211_RADAR_CAC_STARTED); |
| queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk, |
| msecs_to_jiffies(cac_time_ms)); |
| |
| return 0; |
| } |
| |
| void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev) |
| { |
| struct wiphy *wiphy = wdev->wiphy; |
| struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
| |
| lockdep_assert_wiphy(wiphy); |
| |
| if (wdev != rdev->background_radar_wdev) |
| return; |
| |
| rdev_set_radar_background(rdev, NULL); |
| rdev->background_radar_wdev = NULL; /* Release offchain ownership */ |
| |
| __cfg80211_background_cac_event(rdev, wdev, |
| &rdev->background_radar_chandef, |
| NL80211_RADAR_CAC_ABORTED); |
| } |