diff options
Diffstat (limited to 'net/wireless/sme.c')
| -rw-r--r-- | net/wireless/sme.c | 1627 |
1 files changed, 1627 insertions, 0 deletions
diff --git a/net/wireless/sme.c b/net/wireless/sme.c new file mode 100644 index 0000000000..9bba233b5a --- /dev/null +++ b/net/wireless/sme.c @@ -0,0 +1,1627 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SME code for cfg80211 + * both driver SME event handling and the SME implementation + * (for nl80211's connect() and wext) + * + * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> + * Copyright (C) 2009, 2020, 2022-2023 Intel Corporation. All rights reserved. + * Copyright 2017 Intel Deutschland GmbH + */ + +#include <linux/etherdevice.h> +#include <linux/if_arp.h> +#include <linux/slab.h> +#include <linux/workqueue.h> +#include <linux/wireless.h> +#include <linux/export.h> +#include <net/iw_handler.h> +#include <net/cfg80211.h> +#include <net/rtnetlink.h> +#include "nl80211.h" +#include "reg.h" +#include "rdev-ops.h" + +/* + * Software SME in cfg80211, using auth/assoc/deauth calls to the + * driver. This is for implementing nl80211's connect/disconnect + * and wireless extensions (if configured.) + */ + +struct cfg80211_conn { + struct cfg80211_connect_params params; + /* these are sub-states of the _CONNECTING sme_state */ + enum { + CFG80211_CONN_SCANNING, + CFG80211_CONN_SCAN_AGAIN, + CFG80211_CONN_AUTHENTICATE_NEXT, + CFG80211_CONN_AUTHENTICATING, + CFG80211_CONN_AUTH_FAILED_TIMEOUT, + CFG80211_CONN_ASSOCIATE_NEXT, + CFG80211_CONN_ASSOCIATING, + CFG80211_CONN_ASSOC_FAILED, + CFG80211_CONN_ASSOC_FAILED_TIMEOUT, + CFG80211_CONN_DEAUTH, + CFG80211_CONN_ABANDON, + CFG80211_CONN_CONNECTED, + } state; + u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; + const u8 *ie; + size_t ie_len; + bool auto_auth, prev_bssid_valid; +}; + +static void cfg80211_sme_free(struct wireless_dev *wdev) +{ + if (!wdev->conn) + return; + + kfree(wdev->conn->ie); + kfree(wdev->conn); + wdev->conn = NULL; +} + +static int cfg80211_conn_scan(struct wireless_dev *wdev) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_scan_request *request; + int n_channels, err; + + ASSERT_WDEV_LOCK(wdev); + + if (rdev->scan_req || rdev->scan_msg) + return -EBUSY; + + if (wdev->conn->params.channel) + n_channels = 1; + else + n_channels = ieee80211_get_num_supported_channels(wdev->wiphy); + + request = kzalloc(sizeof(*request) + sizeof(request->ssids[0]) + + sizeof(request->channels[0]) * n_channels, + GFP_KERNEL); + if (!request) + return -ENOMEM; + + if (wdev->conn->params.channel) { + enum nl80211_band band = wdev->conn->params.channel->band; + struct ieee80211_supported_band *sband = + wdev->wiphy->bands[band]; + + if (!sband) { + kfree(request); + return -EINVAL; + } + request->channels[0] = wdev->conn->params.channel; + request->rates[band] = (1 << sband->n_bitrates) - 1; + } else { + int i = 0, j; + enum nl80211_band band; + struct ieee80211_supported_band *bands; + struct ieee80211_channel *channel; + + for (band = 0; band < NUM_NL80211_BANDS; band++) { + bands = wdev->wiphy->bands[band]; + if (!bands) + continue; + for (j = 0; j < bands->n_channels; j++) { + channel = &bands->channels[j]; + if (channel->flags & IEEE80211_CHAN_DISABLED) + continue; + request->channels[i++] = channel; + } + request->rates[band] = (1 << bands->n_bitrates) - 1; + } + n_channels = i; + } + request->n_channels = n_channels; + request->ssids = (void *)&request->channels[n_channels]; + request->n_ssids = 1; + + memcpy(request->ssids[0].ssid, wdev->conn->params.ssid, + wdev->conn->params.ssid_len); + request->ssids[0].ssid_len = wdev->conn->params.ssid_len; + + eth_broadcast_addr(request->bssid); + + request->wdev = wdev; + request->wiphy = &rdev->wiphy; + request->scan_start = jiffies; + + rdev->scan_req = request; + + err = rdev_scan(rdev, request); + if (!err) { + wdev->conn->state = CFG80211_CONN_SCANNING; + nl80211_send_scan_start(rdev, wdev); + dev_hold(wdev->netdev); + } else { + rdev->scan_req = NULL; + kfree(request); + } + return err; +} + +static int cfg80211_conn_do_work(struct wireless_dev *wdev, + enum nl80211_timeout_reason *treason) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_connect_params *params; + struct cfg80211_auth_request auth_req = {}; + struct cfg80211_assoc_request req = {}; + int err; + + ASSERT_WDEV_LOCK(wdev); + + if (!wdev->conn) + return 0; + + params = &wdev->conn->params; + + switch (wdev->conn->state) { + case CFG80211_CONN_SCANNING: + /* didn't find it during scan ... */ + return -ENOENT; + case CFG80211_CONN_SCAN_AGAIN: + return cfg80211_conn_scan(wdev); + case CFG80211_CONN_AUTHENTICATE_NEXT: + if (WARN_ON(!rdev->ops->auth)) + return -EOPNOTSUPP; + wdev->conn->state = CFG80211_CONN_AUTHENTICATING; + auth_req.key = params->key; + auth_req.key_len = params->key_len; + auth_req.key_idx = params->key_idx; + auth_req.auth_type = params->auth_type; + auth_req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, + params->bssid, + params->ssid, params->ssid_len, + IEEE80211_BSS_TYPE_ESS, + IEEE80211_PRIVACY_ANY); + auth_req.link_id = -1; + err = cfg80211_mlme_auth(rdev, wdev->netdev, &auth_req); + cfg80211_put_bss(&rdev->wiphy, auth_req.bss); + return err; + case CFG80211_CONN_AUTH_FAILED_TIMEOUT: + *treason = NL80211_TIMEOUT_AUTH; + return -ENOTCONN; + case CFG80211_CONN_ASSOCIATE_NEXT: + if (WARN_ON(!rdev->ops->assoc)) + return -EOPNOTSUPP; + wdev->conn->state = CFG80211_CONN_ASSOCIATING; + if (wdev->conn->prev_bssid_valid) + req.prev_bssid = wdev->conn->prev_bssid; + req.ie = params->ie; + req.ie_len = params->ie_len; + req.use_mfp = params->mfp != NL80211_MFP_NO; + req.crypto = params->crypto; + req.flags = params->flags; + req.ht_capa = params->ht_capa; + req.ht_capa_mask = params->ht_capa_mask; + req.vht_capa = params->vht_capa; + req.vht_capa_mask = params->vht_capa_mask; + req.link_id = -1; + + req.bss = cfg80211_get_bss(&rdev->wiphy, params->channel, + params->bssid, + params->ssid, params->ssid_len, + IEEE80211_BSS_TYPE_ESS, + IEEE80211_PRIVACY_ANY); + if (!req.bss) { + err = -ENOENT; + } else { + err = cfg80211_mlme_assoc(rdev, wdev->netdev, &req); + cfg80211_put_bss(&rdev->wiphy, req.bss); + } + + if (err) + cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, + NULL, 0, + WLAN_REASON_DEAUTH_LEAVING, + false); + return err; + case CFG80211_CONN_ASSOC_FAILED_TIMEOUT: + *treason = NL80211_TIMEOUT_ASSOC; + fallthrough; + case CFG80211_CONN_ASSOC_FAILED: + cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, + NULL, 0, + WLAN_REASON_DEAUTH_LEAVING, false); + return -ENOTCONN; + case CFG80211_CONN_DEAUTH: + cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, + NULL, 0, + WLAN_REASON_DEAUTH_LEAVING, false); + fallthrough; + case CFG80211_CONN_ABANDON: + /* free directly, disconnected event already sent */ + cfg80211_sme_free(wdev); + return 0; + default: + return 0; + } +} + +void cfg80211_conn_work(struct work_struct *work) +{ + struct cfg80211_registered_device *rdev = + container_of(work, struct cfg80211_registered_device, conn_work); + struct wireless_dev *wdev; + u8 bssid_buf[ETH_ALEN], *bssid = NULL; + enum nl80211_timeout_reason treason; + + wiphy_lock(&rdev->wiphy); + + list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { + if (!wdev->netdev) + continue; + + wdev_lock(wdev); + if (!netif_running(wdev->netdev)) { + wdev_unlock(wdev); + continue; + } + if (!wdev->conn || + wdev->conn->state == CFG80211_CONN_CONNECTED) { + wdev_unlock(wdev); + continue; + } + if (wdev->conn->params.bssid) { + memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); + bssid = bssid_buf; + } + treason = NL80211_TIMEOUT_UNSPECIFIED; + if (cfg80211_conn_do_work(wdev, &treason)) { + struct cfg80211_connect_resp_params cr; + + memset(&cr, 0, sizeof(cr)); + cr.status = -1; + cr.links[0].bssid = bssid; + cr.timeout_reason = treason; + __cfg80211_connect_result(wdev->netdev, &cr, false); + } + wdev_unlock(wdev); + } + + wiphy_unlock(&rdev->wiphy); +} + +static void cfg80211_step_auth_next(struct cfg80211_conn *conn, + struct cfg80211_bss *bss) +{ + memcpy(conn->bssid, bss->bssid, ETH_ALEN); + conn->params.bssid = conn->bssid; + conn->params.channel = bss->channel; + conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; +} + +/* Returned bss is reference counted and must be cleaned up appropriately. */ +static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_bss *bss; + + ASSERT_WDEV_LOCK(wdev); + + bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, + wdev->conn->params.bssid, + wdev->conn->params.ssid, + wdev->conn->params.ssid_len, + wdev->conn_bss_type, + IEEE80211_PRIVACY(wdev->conn->params.privacy)); + if (!bss) + return NULL; + + cfg80211_step_auth_next(wdev->conn, bss); + schedule_work(&rdev->conn_work); + + return bss; +} + +static void __cfg80211_sme_scan_done(struct net_device *dev) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_bss *bss; + + ASSERT_WDEV_LOCK(wdev); + + if (!wdev->conn) + return; + + if (wdev->conn->state != CFG80211_CONN_SCANNING && + wdev->conn->state != CFG80211_CONN_SCAN_AGAIN) + return; + + bss = cfg80211_get_conn_bss(wdev); + if (bss) + cfg80211_put_bss(&rdev->wiphy, bss); + else + schedule_work(&rdev->conn_work); +} + +void cfg80211_sme_scan_done(struct net_device *dev) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + + wdev_lock(wdev); + __cfg80211_sme_scan_done(dev); + wdev_unlock(wdev); +} + +void cfg80211_sme_rx_auth(struct wireless_dev *wdev, const u8 *buf, size_t len) +{ + struct wiphy *wiphy = wdev->wiphy; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); + struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; + u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); + + ASSERT_WDEV_LOCK(wdev); + + if (!wdev->conn || wdev->conn->state == CFG80211_CONN_CONNECTED) + return; + + if (status_code == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG && + wdev->conn->auto_auth && + wdev->conn->params.auth_type != NL80211_AUTHTYPE_NETWORK_EAP) { + /* select automatically between only open, shared, leap */ + switch (wdev->conn->params.auth_type) { + case NL80211_AUTHTYPE_OPEN_SYSTEM: + if (wdev->connect_keys) + wdev->conn->params.auth_type = + NL80211_AUTHTYPE_SHARED_KEY; + else + wdev->conn->params.auth_type = + NL80211_AUTHTYPE_NETWORK_EAP; + break; + case NL80211_AUTHTYPE_SHARED_KEY: + wdev->conn->params.auth_type = + NL80211_AUTHTYPE_NETWORK_EAP; + break; + default: + /* huh? */ + wdev->conn->params.auth_type = + NL80211_AUTHTYPE_OPEN_SYSTEM; + break; + } + wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; + schedule_work(&rdev->conn_work); + } else if (status_code != WLAN_STATUS_SUCCESS) { + struct cfg80211_connect_resp_params cr; + + memset(&cr, 0, sizeof(cr)); + cr.status = status_code; + cr.links[0].bssid = mgmt->bssid; + cr.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED; + __cfg80211_connect_result(wdev->netdev, &cr, false); + } else if (wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { + wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; + schedule_work(&rdev->conn_work); + } +} + +bool cfg80211_sme_rx_assoc_resp(struct wireless_dev *wdev, u16 status) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + if (!wdev->conn) + return false; + + if (status == WLAN_STATUS_SUCCESS) { + wdev->conn->state = CFG80211_CONN_CONNECTED; + return false; + } + + if (wdev->conn->prev_bssid_valid) { + /* + * Some stupid APs don't accept reassoc, so we + * need to fall back to trying regular assoc; + * return true so no event is sent to userspace. + */ + wdev->conn->prev_bssid_valid = false; + wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; + schedule_work(&rdev->conn_work); + return true; + } + + wdev->conn->state = CFG80211_CONN_ASSOC_FAILED; + schedule_work(&rdev->conn_work); + return false; +} + +void cfg80211_sme_deauth(struct wireless_dev *wdev) +{ + cfg80211_sme_free(wdev); +} + +void cfg80211_sme_auth_timeout(struct wireless_dev *wdev) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + if (!wdev->conn) + return; + + wdev->conn->state = CFG80211_CONN_AUTH_FAILED_TIMEOUT; + schedule_work(&rdev->conn_work); +} + +void cfg80211_sme_disassoc(struct wireless_dev *wdev) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + if (!wdev->conn) + return; + + wdev->conn->state = CFG80211_CONN_DEAUTH; + schedule_work(&rdev->conn_work); +} + +void cfg80211_sme_assoc_timeout(struct wireless_dev *wdev) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + if (!wdev->conn) + return; + + wdev->conn->state = CFG80211_CONN_ASSOC_FAILED_TIMEOUT; + schedule_work(&rdev->conn_work); +} + +void cfg80211_sme_abandon_assoc(struct wireless_dev *wdev) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + if (!wdev->conn) + return; + + wdev->conn->state = CFG80211_CONN_ABANDON; + schedule_work(&rdev->conn_work); +} + +static void cfg80211_wdev_release_bsses(struct wireless_dev *wdev) +{ + unsigned int link; + + for_each_valid_link(wdev, link) { + if (!wdev->links[link].client.current_bss) + continue; + cfg80211_unhold_bss(wdev->links[link].client.current_bss); + cfg80211_put_bss(wdev->wiphy, + &wdev->links[link].client.current_bss->pub); + wdev->links[link].client.current_bss = NULL; + } +} + +void cfg80211_wdev_release_link_bsses(struct wireless_dev *wdev, u16 link_mask) +{ + unsigned int link; + + for_each_valid_link(wdev, link) { + if (!wdev->links[link].client.current_bss || + !(link_mask & BIT(link))) + continue; + cfg80211_unhold_bss(wdev->links[link].client.current_bss); + cfg80211_put_bss(wdev->wiphy, + &wdev->links[link].client.current_bss->pub); + wdev->links[link].client.current_bss = NULL; + } +} + +static int cfg80211_sme_get_conn_ies(struct wireless_dev *wdev, + const u8 *ies, size_t ies_len, + const u8 **out_ies, size_t *out_ies_len) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + u8 *buf; + size_t offs; + + if (!rdev->wiphy.extended_capabilities_len || + (ies && cfg80211_find_ie(WLAN_EID_EXT_CAPABILITY, ies, ies_len))) { + *out_ies = kmemdup(ies, ies_len, GFP_KERNEL); + if (!*out_ies) + return -ENOMEM; + *out_ies_len = ies_len; + return 0; + } + + buf = kmalloc(ies_len + rdev->wiphy.extended_capabilities_len + 2, + GFP_KERNEL); + if (!buf) + return -ENOMEM; + + if (ies_len) { + static const u8 before_extcapa[] = { + /* not listing IEs expected to be created by driver */ + WLAN_EID_RSN, + WLAN_EID_QOS_CAPA, + WLAN_EID_RRM_ENABLED_CAPABILITIES, + WLAN_EID_MOBILITY_DOMAIN, + WLAN_EID_SUPPORTED_REGULATORY_CLASSES, + WLAN_EID_BSS_COEX_2040, + }; + + offs = ieee80211_ie_split(ies, ies_len, before_extcapa, + ARRAY_SIZE(before_extcapa), 0); + memcpy(buf, ies, offs); + /* leave a whole for extended capabilities IE */ + memcpy(buf + offs + rdev->wiphy.extended_capabilities_len + 2, + ies + offs, ies_len - offs); + } else { + offs = 0; + } + + /* place extended capabilities IE (with only driver capabilities) */ + buf[offs] = WLAN_EID_EXT_CAPABILITY; + buf[offs + 1] = rdev->wiphy.extended_capabilities_len; + memcpy(buf + offs + 2, + rdev->wiphy.extended_capabilities, + rdev->wiphy.extended_capabilities_len); + + *out_ies = buf; + *out_ies_len = ies_len + rdev->wiphy.extended_capabilities_len + 2; + + return 0; +} + +static int cfg80211_sme_connect(struct wireless_dev *wdev, + struct cfg80211_connect_params *connect, + const u8 *prev_bssid) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_bss *bss; + int err; + + if (!rdev->ops->auth || !rdev->ops->assoc) + return -EOPNOTSUPP; + + cfg80211_wdev_release_bsses(wdev); + + if (wdev->connected) { + cfg80211_sme_free(wdev); + wdev->connected = false; + } + + if (wdev->conn) + return -EINPROGRESS; + + wdev->conn = kzalloc(sizeof(*wdev->conn), GFP_KERNEL); + if (!wdev->conn) + return -ENOMEM; + + /* + * Copy all parameters, and treat explicitly IEs, BSSID, SSID. + */ + memcpy(&wdev->conn->params, connect, sizeof(*connect)); + if (connect->bssid) { + wdev->conn->params.bssid = wdev->conn->bssid; + memcpy(wdev->conn->bssid, connect->bssid, ETH_ALEN); + } + + if (cfg80211_sme_get_conn_ies(wdev, connect->ie, connect->ie_len, + &wdev->conn->ie, + &wdev->conn->params.ie_len)) { + kfree(wdev->conn); + wdev->conn = NULL; + return -ENOMEM; + } + wdev->conn->params.ie = wdev->conn->ie; + + if (connect->auth_type == NL80211_AUTHTYPE_AUTOMATIC) { + wdev->conn->auto_auth = true; + /* start with open system ... should mostly work */ + wdev->conn->params.auth_type = + NL80211_AUTHTYPE_OPEN_SYSTEM; + } else { + wdev->conn->auto_auth = false; + } + + wdev->conn->params.ssid = wdev->u.client.ssid; + wdev->conn->params.ssid_len = wdev->u.client.ssid_len; + + /* see if we have the bss already */ + bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, + wdev->conn->params.bssid, + wdev->conn->params.ssid, + wdev->conn->params.ssid_len, + wdev->conn_bss_type, + IEEE80211_PRIVACY(wdev->conn->params.privacy)); + + if (prev_bssid) { + memcpy(wdev->conn->prev_bssid, prev_bssid, ETH_ALEN); + wdev->conn->prev_bssid_valid = true; + } + + /* we're good if we have a matching bss struct */ + if (bss) { + enum nl80211_timeout_reason treason; + + cfg80211_step_auth_next(wdev->conn, bss); + err = cfg80211_conn_do_work(wdev, &treason); + cfg80211_put_bss(wdev->wiphy, bss); + } else { + /* otherwise we'll need to scan for the AP first */ + err = cfg80211_conn_scan(wdev); + + /* + * If we can't scan right now, then we need to scan again + * after the current scan finished, since the parameters + * changed (unless we find a good AP anyway). + */ + if (err == -EBUSY) { + err = 0; + wdev->conn->state = CFG80211_CONN_SCAN_AGAIN; + } + } + + if (err) + cfg80211_sme_free(wdev); + + return err; +} + +static int cfg80211_sme_disconnect(struct wireless_dev *wdev, u16 reason) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + int err; + + if (!wdev->conn) + return 0; + + if (!rdev->ops->deauth) + return -EOPNOTSUPP; + + if (wdev->conn->state == CFG80211_CONN_SCANNING || + wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) { + err = 0; + goto out; + } + + /* wdev->conn->params.bssid must be set if > SCANNING */ + err = cfg80211_mlme_deauth(rdev, wdev->netdev, + wdev->conn->params.bssid, + NULL, 0, reason, false); + out: + cfg80211_sme_free(wdev); + return err; +} + +/* + * code shared for in-device and software SME + */ + +static bool cfg80211_is_all_idle(void) +{ + struct cfg80211_registered_device *rdev; + struct wireless_dev *wdev; + bool is_all_idle = true; + + /* + * All devices must be idle as otherwise if you are actively + * scanning some new beacon hints could be learned and would + * count as new regulatory hints. + * Also if there is any other active beaconing interface we + * need not issue a disconnect hint and reset any info such + * as chan dfs state, etc. + */ + list_for_each_entry(rdev, &cfg80211_rdev_list, list) { + list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { + wdev_lock(wdev); + if (wdev->conn || wdev->connected || + cfg80211_beaconing_iface_active(wdev)) + is_all_idle = false; + wdev_unlock(wdev); + } + } + + return is_all_idle; +} + +static void disconnect_work(struct work_struct *work) +{ + rtnl_lock(); + if (cfg80211_is_all_idle()) + regulatory_hint_disconnect(); + rtnl_unlock(); +} + +DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); + +static void +cfg80211_connect_result_release_bsses(struct wireless_dev *wdev, + struct cfg80211_connect_resp_params *cr) +{ + unsigned int link; + + for_each_valid_link(cr, link) { + if (!cr->links[link].bss) + continue; + cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); + cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); + } +} + +/* + * API calls for drivers implementing connect/disconnect and + * SME event handling + */ + +/* This method must consume bss one way or another */ +void __cfg80211_connect_result(struct net_device *dev, + struct cfg80211_connect_resp_params *cr, + bool wextev) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + const struct element *country_elem = NULL; + const struct element *ssid; + const u8 *country_data; + u8 country_datalen; +#ifdef CONFIG_CFG80211_WEXT + union iwreq_data wrqu; +#endif + unsigned int link; + const u8 *connected_addr; + bool bss_not_found = false; + + ASSERT_WDEV_LOCK(wdev); + + if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && + wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) + goto out; + + if (cr->valid_links) { + if (WARN_ON(!cr->ap_mld_addr)) + goto out; + + for_each_valid_link(cr, link) { + if (WARN_ON(!cr->links[link].addr)) + goto out; + } + + if (WARN_ON(wdev->connect_keys)) + goto out; + } + + wdev->unprot_beacon_reported = 0; + nl80211_send_connect_result(wiphy_to_rdev(wdev->wiphy), dev, cr, + GFP_KERNEL); + connected_addr = cr->valid_links ? cr->ap_mld_addr : cr->links[0].bssid; + +#ifdef CONFIG_CFG80211_WEXT + if (wextev && !cr->valid_links) { + if (cr->req_ie && cr->status == WLAN_STATUS_SUCCESS) { + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = cr->req_ie_len; + wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, + cr->req_ie); + } + + if (cr->resp_ie && cr->status == WLAN_STATUS_SUCCESS) { + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = cr->resp_ie_len; + wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, + cr->resp_ie); + } + + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + if (connected_addr && cr->status == WLAN_STATUS_SUCCESS) { + memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); + memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); + wdev->wext.prev_bssid_valid = true; + } + wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); + } +#endif + + if (cr->status == WLAN_STATUS_SUCCESS) { + if (!wiphy_to_rdev(wdev->wiphy)->ops->connect) { + for_each_valid_link(cr, link) { + if (WARN_ON_ONCE(!cr->links[link].bss)) + break; + } + } + + for_each_valid_link(cr, link) { + /* don't do extra lookups for failures */ + if (cr->links[link].status != WLAN_STATUS_SUCCESS) + continue; + + if (cr->links[link].bss) + continue; + + cr->links[link].bss = + cfg80211_get_bss(wdev->wiphy, NULL, + cr->links[link].bssid, + wdev->u.client.ssid, + wdev->u.client.ssid_len, + wdev->conn_bss_type, + IEEE80211_PRIVACY_ANY); + if (!cr->links[link].bss) { + bss_not_found = true; + break; + } + cfg80211_hold_bss(bss_from_pub(cr->links[link].bss)); + } + } + + cfg80211_wdev_release_bsses(wdev); + + if (cr->status != WLAN_STATUS_SUCCESS) { + kfree_sensitive(wdev->connect_keys); + wdev->connect_keys = NULL; + wdev->u.client.ssid_len = 0; + wdev->conn_owner_nlportid = 0; + cfg80211_connect_result_release_bsses(wdev, cr); + cfg80211_sme_free(wdev); + return; + } + + if (WARN_ON(bss_not_found)) { + cfg80211_connect_result_release_bsses(wdev, cr); + return; + } + + memset(wdev->links, 0, sizeof(wdev->links)); + for_each_valid_link(cr, link) { + if (cr->links[link].status == WLAN_STATUS_SUCCESS) + continue; + cr->valid_links &= ~BIT(link); + /* don't require bss pointer for failed links */ + if (!cr->links[link].bss) + continue; + cfg80211_unhold_bss(bss_from_pub(cr->links[link].bss)); + cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); + } + wdev->valid_links = cr->valid_links; + for_each_valid_link(cr, link) + wdev->links[link].client.current_bss = + bss_from_pub(cr->links[link].bss); + wdev->connected = true; + ether_addr_copy(wdev->u.client.connected_addr, connected_addr); + if (cr->valid_links) { + for_each_valid_link(cr, link) + memcpy(wdev->links[link].addr, cr->links[link].addr, + ETH_ALEN); + } + + cfg80211_upload_connect_keys(wdev); + + rcu_read_lock(); + for_each_valid_link(cr, link) { + country_elem = + ieee80211_bss_get_elem(cr->links[link].bss, + WLAN_EID_COUNTRY); + if (country_elem) + break; + } + if (!country_elem) { + rcu_read_unlock(); + return; + } + + country_datalen = country_elem->datalen; + country_data = kmemdup(country_elem->data, country_datalen, GFP_ATOMIC); + rcu_read_unlock(); + + if (!country_data) + return; + + regulatory_hint_country_ie(wdev->wiphy, + cr->links[link].bss->channel->band, + country_data, country_datalen); + kfree(country_data); + + if (!wdev->u.client.ssid_len) { + rcu_read_lock(); + for_each_valid_link(cr, link) { + ssid = ieee80211_bss_get_elem(cr->links[link].bss, + WLAN_EID_SSID); + + if (!ssid || !ssid->datalen) + continue; + + memcpy(wdev->u.client.ssid, ssid->data, ssid->datalen); + wdev->u.client.ssid_len = ssid->datalen; + break; + } + rcu_read_unlock(); + } + + return; +out: + for_each_valid_link(cr, link) + cfg80211_put_bss(wdev->wiphy, cr->links[link].bss); +} + +static void cfg80211_update_link_bss(struct wireless_dev *wdev, + struct cfg80211_bss **bss) +{ + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_internal_bss *ibss; + + if (!*bss) + return; + + ibss = bss_from_pub(*bss); + if (list_empty(&ibss->list)) { + struct cfg80211_bss *found = NULL, *tmp = *bss; + + found = cfg80211_get_bss(wdev->wiphy, NULL, + (*bss)->bssid, + wdev->u.client.ssid, + wdev->u.client.ssid_len, + wdev->conn_bss_type, + IEEE80211_PRIVACY_ANY); + if (found) { + /* The same BSS is already updated so use it + * instead, as it has latest info. + */ + *bss = found; + } else { + /* Update with BSS provided by driver, it will + * be freshly added and ref cnted, we can free + * the old one. + * + * signal_valid can be false, as we are not + * expecting the BSS to be found. + * + * keep the old timestamp to avoid confusion + */ + cfg80211_bss_update(rdev, ibss, false, + ibss->ts); + } + + cfg80211_put_bss(wdev->wiphy, tmp); + } +} + +/* Consumes bss object(s) one way or another */ +void cfg80211_connect_done(struct net_device *dev, + struct cfg80211_connect_resp_params *params, + gfp_t gfp) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_event *ev; + unsigned long flags; + u8 *next; + size_t link_info_size = 0; + unsigned int link; + + for_each_valid_link(params, link) { + cfg80211_update_link_bss(wdev, ¶ms->links[link].bss); + link_info_size += params->links[link].bssid ? ETH_ALEN : 0; + link_info_size += params->links[link].addr ? ETH_ALEN : 0; + } + + ev = kzalloc(sizeof(*ev) + (params->ap_mld_addr ? ETH_ALEN : 0) + + params->req_ie_len + params->resp_ie_len + + params->fils.kek_len + params->fils.pmk_len + + (params->fils.pmkid ? WLAN_PMKID_LEN : 0) + link_info_size, + gfp); + + if (!ev) { + for_each_valid_link(params, link) + cfg80211_put_bss(wdev->wiphy, + params->links[link].bss); + return; + } + + ev->type = EVENT_CONNECT_RESULT; + next = ((u8 *)ev) + sizeof(*ev); + if (params->ap_mld_addr) { + ev->cr.ap_mld_addr = next; + memcpy((void *)ev->cr.ap_mld_addr, params->ap_mld_addr, + ETH_ALEN); + next += ETH_ALEN; + } + if (params->req_ie_len) { + ev->cr.req_ie = next; + ev->cr.req_ie_len = params->req_ie_len; + memcpy((void *)ev->cr.req_ie, params->req_ie, + params->req_ie_len); + next += params->req_ie_len; + } + if (params->resp_ie_len) { + ev->cr.resp_ie = next; + ev->cr.resp_ie_len = params->resp_ie_len; + memcpy((void *)ev->cr.resp_ie, params->resp_ie, + params->resp_ie_len); + next += params->resp_ie_len; + } + if (params->fils.kek_len) { + ev->cr.fils.kek = next; + ev->cr.fils.kek_len = params->fils.kek_len; + memcpy((void *)ev->cr.fils.kek, params->fils.kek, + params->fils.kek_len); + next += params->fils.kek_len; + } + if (params->fils.pmk_len) { + ev->cr.fils.pmk = next; + ev->cr.fils.pmk_len = params->fils.pmk_len; + memcpy((void *)ev->cr.fils.pmk, params->fils.pmk, + params->fils.pmk_len); + next += params->fils.pmk_len; + } + if (params->fils.pmkid) { + ev->cr.fils.pmkid = next; + memcpy((void *)ev->cr.fils.pmkid, params->fils.pmkid, + WLAN_PMKID_LEN); + next += WLAN_PMKID_LEN; + } + ev->cr.fils.update_erp_next_seq_num = params->fils.update_erp_next_seq_num; + if (params->fils.update_erp_next_seq_num) + ev->cr.fils.erp_next_seq_num = params->fils.erp_next_seq_num; + ev->cr.valid_links = params->valid_links; + for_each_valid_link(params, link) { + if (params->links[link].bss) + cfg80211_hold_bss( + bss_from_pub(params->links[link].bss)); + ev->cr.links[link].bss = params->links[link].bss; + + if (params->links[link].addr) { + ev->cr.links[link].addr = next; + memcpy((void *)ev->cr.links[link].addr, + params->links[link].addr, + ETH_ALEN); + next += ETH_ALEN; + } + if (params->links[link].bssid) { + ev->cr.links[link].bssid = next; + memcpy((void *)ev->cr.links[link].bssid, + params->links[link].bssid, + ETH_ALEN); + next += ETH_ALEN; + } + } + ev->cr.status = params->status; + ev->cr.timeout_reason = params->timeout_reason; + + spin_lock_irqsave(&wdev->event_lock, flags); + list_add_tail(&ev->list, &wdev->event_list); + spin_unlock_irqrestore(&wdev->event_lock, flags); + queue_work(cfg80211_wq, &rdev->event_work); +} +EXPORT_SYMBOL(cfg80211_connect_done); + +/* Consumes bss object one way or another */ +void __cfg80211_roamed(struct wireless_dev *wdev, + struct cfg80211_roam_info *info) +{ +#ifdef CONFIG_CFG80211_WEXT + union iwreq_data wrqu; +#endif + unsigned int link; + const u8 *connected_addr; + + ASSERT_WDEV_LOCK(wdev); + + if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && + wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) + goto out; + + if (WARN_ON(!wdev->connected)) + goto out; + + if (info->valid_links) { + if (WARN_ON(!info->ap_mld_addr)) + goto out; + + for_each_valid_link(info, link) { + if (WARN_ON(!info->links[link].addr)) + goto out; + } + } + + cfg80211_wdev_release_bsses(wdev); + + for_each_valid_link(info, link) { + if (WARN_ON(!info->links[link].bss)) + goto out; + } + + memset(wdev->links, 0, sizeof(wdev->links)); + wdev->valid_links = info->valid_links; + for_each_valid_link(info, link) { + cfg80211_hold_bss(bss_from_pub(info->links[link].bss)); + wdev->links[link].client.current_bss = + bss_from_pub(info->links[link].bss); + } + + connected_addr = info->valid_links ? + info->ap_mld_addr : + info->links[0].bss->bssid; + ether_addr_copy(wdev->u.client.connected_addr, connected_addr); + if (info->valid_links) { + for_each_valid_link(info, link) + memcpy(wdev->links[link].addr, info->links[link].addr, + ETH_ALEN); + } + wdev->unprot_beacon_reported = 0; + nl80211_send_roamed(wiphy_to_rdev(wdev->wiphy), + wdev->netdev, info, GFP_KERNEL); + +#ifdef CONFIG_CFG80211_WEXT + if (!info->valid_links) { + if (info->req_ie) { + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = info->req_ie_len; + wireless_send_event(wdev->netdev, IWEVASSOCREQIE, + &wrqu, info->req_ie); + } + + if (info->resp_ie) { + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.data.length = info->resp_ie_len; + wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, + &wrqu, info->resp_ie); + } + + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + memcpy(wrqu.ap_addr.sa_data, connected_addr, ETH_ALEN); + memcpy(wdev->wext.prev_bssid, connected_addr, ETH_ALEN); + wdev->wext.prev_bssid_valid = true; + wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); + } +#endif + + return; +out: + for_each_valid_link(info, link) + cfg80211_put_bss(wdev->wiphy, info->links[link].bss); +} + +/* Consumes info->links.bss object(s) one way or another */ +void cfg80211_roamed(struct net_device *dev, struct cfg80211_roam_info *info, + gfp_t gfp) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_event *ev; + unsigned long flags; + u8 *next; + unsigned int link; + size_t link_info_size = 0; + bool bss_not_found = false; + + for_each_valid_link(info, link) { + link_info_size += info->links[link].addr ? ETH_ALEN : 0; + link_info_size += info->links[link].bssid ? ETH_ALEN : 0; + + if (info->links[link].bss) + continue; + + info->links[link].bss = + cfg80211_get_bss(wdev->wiphy, + info->links[link].channel, + info->links[link].bssid, + wdev->u.client.ssid, + wdev->u.client.ssid_len, + wdev->conn_bss_type, + IEEE80211_PRIVACY_ANY); + + if (!info->links[link].bss) { + bss_not_found = true; + break; + } + } + + if (WARN_ON(bss_not_found)) + goto out; + + ev = kzalloc(sizeof(*ev) + info->req_ie_len + info->resp_ie_len + + info->fils.kek_len + info->fils.pmk_len + + (info->fils.pmkid ? WLAN_PMKID_LEN : 0) + + (info->ap_mld_addr ? ETH_ALEN : 0) + link_info_size, gfp); + if (!ev) + goto out; + + ev->type = EVENT_ROAMED; + next = ((u8 *)ev) + sizeof(*ev); + if (info->req_ie_len) { + ev->rm.req_ie = next; + ev->rm.req_ie_len = info->req_ie_len; + memcpy((void *)ev->rm.req_ie, info->req_ie, info->req_ie_len); + next += info->req_ie_len; + } + if (info->resp_ie_len) { + ev->rm.resp_ie = next; + ev->rm.resp_ie_len = info->resp_ie_len; + memcpy((void *)ev->rm.resp_ie, info->resp_ie, + info->resp_ie_len); + next += info->resp_ie_len; + } + if (info->fils.kek_len) { + ev->rm.fils.kek = next; + ev->rm.fils.kek_len = info->fils.kek_len; + memcpy((void *)ev->rm.fils.kek, info->fils.kek, + info->fils.kek_len); + next += info->fils.kek_len; + } + if (info->fils.pmk_len) { + ev->rm.fils.pmk = next; + ev->rm.fils.pmk_len = info->fils.pmk_len; + memcpy((void *)ev->rm.fils.pmk, info->fils.pmk, + info->fils.pmk_len); + next += info->fils.pmk_len; + } + if (info->fils.pmkid) { + ev->rm.fils.pmkid = next; + memcpy((void *)ev->rm.fils.pmkid, info->fils.pmkid, + WLAN_PMKID_LEN); + next += WLAN_PMKID_LEN; + } + ev->rm.fils.update_erp_next_seq_num = info->fils.update_erp_next_seq_num; + if (info->fils.update_erp_next_seq_num) + ev->rm.fils.erp_next_seq_num = info->fils.erp_next_seq_num; + if (info->ap_mld_addr) { + ev->rm.ap_mld_addr = next; + memcpy((void *)ev->rm.ap_mld_addr, info->ap_mld_addr, + ETH_ALEN); + next += ETH_ALEN; + } + ev->rm.valid_links = info->valid_links; + for_each_valid_link(info, link) { + ev->rm.links[link].bss = info->links[link].bss; + + if (info->links[link].addr) { + ev->rm.links[link].addr = next; + memcpy((void *)ev->rm.links[link].addr, + info->links[link].addr, + ETH_ALEN); + next += ETH_ALEN; + } + + if (info->links[link].bssid) { + ev->rm.links[link].bssid = next; + memcpy((void *)ev->rm.links[link].bssid, + info->links[link].bssid, + ETH_ALEN); + next += ETH_ALEN; + } + } + + spin_lock_irqsave(&wdev->event_lock, flags); + list_add_tail(&ev->list, &wdev->event_list); + spin_unlock_irqrestore(&wdev->event_lock, flags); + queue_work(cfg80211_wq, &rdev->event_work); + + return; +out: + for_each_valid_link(info, link) + cfg80211_put_bss(wdev->wiphy, info->links[link].bss); + +} +EXPORT_SYMBOL(cfg80211_roamed); + +void __cfg80211_port_authorized(struct wireless_dev *wdev, const u8 *bssid, + const u8 *td_bitmap, u8 td_bitmap_len) +{ + ASSERT_WDEV_LOCK(wdev); + + if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && + wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) + return; + + if (WARN_ON(!wdev->connected) || + WARN_ON(!ether_addr_equal(wdev->u.client.connected_addr, bssid))) + return; + + nl80211_send_port_authorized(wiphy_to_rdev(wdev->wiphy), wdev->netdev, + bssid, td_bitmap, td_bitmap_len); +} + +void cfg80211_port_authorized(struct net_device *dev, const u8 *bssid, + const u8 *td_bitmap, u8 td_bitmap_len, gfp_t gfp) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_event *ev; + unsigned long flags; + + if (WARN_ON(!bssid)) + return; + + ev = kzalloc(sizeof(*ev) + td_bitmap_len, gfp); + if (!ev) + return; + + ev->type = EVENT_PORT_AUTHORIZED; + memcpy(ev->pa.bssid, bssid, ETH_ALEN); + ev->pa.td_bitmap = ((u8 *)ev) + sizeof(*ev); + ev->pa.td_bitmap_len = td_bitmap_len; + memcpy((void *)ev->pa.td_bitmap, td_bitmap, td_bitmap_len); + + /* + * Use the wdev event list so that if there are pending + * connected/roamed events, they will be reported first. + */ + spin_lock_irqsave(&wdev->event_lock, flags); + list_add_tail(&ev->list, &wdev->event_list); + spin_unlock_irqrestore(&wdev->event_lock, flags); + queue_work(cfg80211_wq, &rdev->event_work); +} +EXPORT_SYMBOL(cfg80211_port_authorized); + +void __cfg80211_disconnected(struct net_device *dev, const u8 *ie, + size_t ie_len, u16 reason, bool from_ap) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + int i; +#ifdef CONFIG_CFG80211_WEXT + union iwreq_data wrqu; +#endif + + ASSERT_WDEV_LOCK(wdev); + + if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION && + wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)) + return; + + cfg80211_wdev_release_bsses(wdev); + wdev->connected = false; + wdev->u.client.ssid_len = 0; + wdev->conn_owner_nlportid = 0; + kfree_sensitive(wdev->connect_keys); + wdev->connect_keys = NULL; + + nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); + + /* stop critical protocol if supported */ + if (rdev->ops->crit_proto_stop && rdev->crit_proto_nlportid) { + rdev->crit_proto_nlportid = 0; + rdev_crit_proto_stop(rdev, wdev); + } + + /* + * Delete all the keys ... pairwise keys can't really + * exist any more anyway, but default keys might. + */ + if (rdev->ops->del_key) { + int max_key_idx = 5; + + if (wiphy_ext_feature_isset( + wdev->wiphy, + NL80211_EXT_FEATURE_BEACON_PROTECTION) || + wiphy_ext_feature_isset( + wdev->wiphy, + NL80211_EXT_FEATURE_BEACON_PROTECTION_CLIENT)) + max_key_idx = 7; + for (i = 0; i <= max_key_idx; i++) + rdev_del_key(rdev, dev, -1, i, false, NULL); + } + + rdev_set_qos_map(rdev, dev, NULL); + +#ifdef CONFIG_CFG80211_WEXT + memset(&wrqu, 0, sizeof(wrqu)); + wrqu.ap_addr.sa_family = ARPHRD_ETHER; + wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); + wdev->wext.connect.ssid_len = 0; +#endif + + schedule_work(&cfg80211_disconnect_work); +} + +void cfg80211_disconnected(struct net_device *dev, u16 reason, + const u8 *ie, size_t ie_len, + bool locally_generated, gfp_t gfp) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + struct cfg80211_event *ev; + unsigned long flags; + + ev = kzalloc(sizeof(*ev) + ie_len, gfp); + if (!ev) + return; + + ev->type = EVENT_DISCONNECTED; + ev->dc.ie = ((u8 *)ev) + sizeof(*ev); + ev->dc.ie_len = ie_len; + memcpy((void *)ev->dc.ie, ie, ie_len); + ev->dc.reason = reason; + ev->dc.locally_generated = locally_generated; + + spin_lock_irqsave(&wdev->event_lock, flags); + list_add_tail(&ev->list, &wdev->event_list); + spin_unlock_irqrestore(&wdev->event_lock, flags); + queue_work(cfg80211_wq, &rdev->event_work); +} +EXPORT_SYMBOL(cfg80211_disconnected); + +/* + * API calls for nl80211/wext compatibility code + */ +int cfg80211_connect(struct cfg80211_registered_device *rdev, + struct net_device *dev, + struct cfg80211_connect_params *connect, + struct cfg80211_cached_keys *connkeys, + const u8 *prev_bssid) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + int err; + + ASSERT_WDEV_LOCK(wdev); + + /* + * If we have an ssid_len, we're trying to connect or are + * already connected, so reject a new SSID unless it's the + * same (which is the case for re-association.) + */ + if (wdev->u.client.ssid_len && + (wdev->u.client.ssid_len != connect->ssid_len || + memcmp(wdev->u.client.ssid, connect->ssid, wdev->u.client.ssid_len))) + return -EALREADY; + + /* + * If connected, reject (re-)association unless prev_bssid + * matches the current BSSID. + */ + if (wdev->connected) { + if (!prev_bssid) + return -EALREADY; + if (!ether_addr_equal(prev_bssid, + wdev->u.client.connected_addr)) + return -ENOTCONN; + } + + /* + * Reject if we're in the process of connecting with WEP, + * this case isn't very interesting and trying to handle + * it would make the code much more complex. + */ + if (wdev->connect_keys) + return -EINPROGRESS; + + cfg80211_oper_and_ht_capa(&connect->ht_capa_mask, + rdev->wiphy.ht_capa_mod_mask); + cfg80211_oper_and_vht_capa(&connect->vht_capa_mask, + rdev->wiphy.vht_capa_mod_mask); + + if (connkeys && connkeys->def >= 0) { + int idx; + u32 cipher; + + idx = connkeys->def; + cipher = connkeys->params[idx].cipher; + /* If given a WEP key we may need it for shared key auth */ + if (cipher == WLAN_CIPHER_SUITE_WEP40 || + cipher == WLAN_CIPHER_SUITE_WEP104) { + connect->key_idx = idx; + connect->key = connkeys->params[idx].key; + connect->key_len = connkeys->params[idx].key_len; + + /* + * If ciphers are not set (e.g. when going through + * iwconfig), we have to set them appropriately here. + */ + if (connect->crypto.cipher_group == 0) + connect->crypto.cipher_group = cipher; + + if (connect->crypto.n_ciphers_pairwise == 0) { + connect->crypto.n_ciphers_pairwise = 1; + connect->crypto.ciphers_pairwise[0] = cipher; + } + } + } else { + if (WARN_ON(connkeys)) + return -EINVAL; + + /* connect can point to wdev->wext.connect which + * can hold key data from a previous connection + */ + connect->key = NULL; + connect->key_len = 0; + connect->key_idx = 0; + } + + wdev->connect_keys = connkeys; + memcpy(wdev->u.client.ssid, connect->ssid, connect->ssid_len); + wdev->u.client.ssid_len = connect->ssid_len; + + wdev->conn_bss_type = connect->pbss ? IEEE80211_BSS_TYPE_PBSS : + IEEE80211_BSS_TYPE_ESS; + + if (!rdev->ops->connect) + err = cfg80211_sme_connect(wdev, connect, prev_bssid); + else + err = rdev_connect(rdev, dev, connect); + + if (err) { + wdev->connect_keys = NULL; + /* + * This could be reassoc getting refused, don't clear + * ssid_len in that case. + */ + if (!wdev->connected) + wdev->u.client.ssid_len = 0; + return err; + } + + return 0; +} + +int cfg80211_disconnect(struct cfg80211_registered_device *rdev, + struct net_device *dev, u16 reason, bool wextev) +{ + struct wireless_dev *wdev = dev->ieee80211_ptr; + int err = 0; + + ASSERT_WDEV_LOCK(wdev); + + kfree_sensitive(wdev->connect_keys); + wdev->connect_keys = NULL; + + wdev->conn_owner_nlportid = 0; + + if (wdev->conn) + err = cfg80211_sme_disconnect(wdev, reason); + else if (!rdev->ops->disconnect) + cfg80211_mlme_down(rdev, dev); + else if (wdev->u.client.ssid_len) + err = rdev_disconnect(rdev, dev, reason); + + /* + * Clear ssid_len unless we actually were fully connected, + * in which case cfg80211_disconnected() will take care of + * this later. + */ + if (!wdev->connected) + wdev->u.client.ssid_len = 0; + + return err; +} + +/* + * Used to clean up after the connection / connection attempt owner socket + * disconnects + */ +void cfg80211_autodisconnect_wk(struct work_struct *work) +{ + struct wireless_dev *wdev = + container_of(work, struct wireless_dev, disconnect_wk); + struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); + + wiphy_lock(wdev->wiphy); + wdev_lock(wdev); + + if (wdev->conn_owner_nlportid) { + switch (wdev->iftype) { + case NL80211_IFTYPE_ADHOC: + __cfg80211_leave_ibss(rdev, wdev->netdev, false); + break; + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_P2P_GO: + __cfg80211_stop_ap(rdev, wdev->netdev, -1, false); + break; + case NL80211_IFTYPE_MESH_POINT: + __cfg80211_leave_mesh(rdev, wdev->netdev); + break; + case NL80211_IFTYPE_STATION: + case NL80211_IFTYPE_P2P_CLIENT: + /* + * Use disconnect_bssid if still connecting and + * ops->disconnect not implemented. Otherwise we can + * use cfg80211_disconnect. + */ + if (rdev->ops->disconnect || wdev->connected) + cfg80211_disconnect(rdev, wdev->netdev, + WLAN_REASON_DEAUTH_LEAVING, + true); + else + cfg80211_mlme_deauth(rdev, wdev->netdev, + wdev->disconnect_bssid, + NULL, 0, + WLAN_REASON_DEAUTH_LEAVING, + false); + break; + default: + break; + } + } + + wdev_unlock(wdev); + wiphy_unlock(wdev->wiphy); +} |