/* * SME code for cfg80211's connect emulation. * * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> * Copyright (C) 2009 Intel Corporation. All rights reserved. */ #include <linux/etherdevice.h> #include <linux/if_arp.h> #include <linux/slab.h> #include <linux/workqueue.h> #include <linux/wireless.h> #include <net/iw_handler.h> #include <net/cfg80211.h> #include <net/rtnetlink.h> #include "nl80211.h" #include "reg.h" struct cfg80211_conn { struct cfg80211_connect_params params; /* these are sub-states of the _CONNECTING sme_state */ enum { CFG80211_CONN_IDLE, CFG80211_CONN_SCANNING, CFG80211_CONN_SCAN_AGAIN, CFG80211_CONN_AUTHENTICATE_NEXT, CFG80211_CONN_AUTHENTICATING, CFG80211_CONN_ASSOCIATE_NEXT, CFG80211_CONN_ASSOCIATING, CFG80211_CONN_DEAUTH_ASSOC_FAIL, } state; u8 bssid[ETH_ALEN], prev_bssid[ETH_ALEN]; u8 *ie; size_t ie_len; bool auto_auth, prev_bssid_valid; }; static bool cfg80211_is_all_idle(void) { struct cfg80211_registered_device *rdev; struct wireless_dev *wdev; bool is_all_idle = true; mutex_lock(&cfg80211_mutex); /* * 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. */ list_for_each_entry(rdev, &cfg80211_rdev_list, list) { cfg80211_lock_rdev(rdev); list_for_each_entry(wdev, &rdev->netdev_list, list) { wdev_lock(wdev); if (wdev->sme_state != CFG80211_SME_IDLE) is_all_idle = false; wdev_unlock(wdev); } cfg80211_unlock_rdev(rdev); } mutex_unlock(&cfg80211_mutex); return is_all_idle; } static void disconnect_work(struct work_struct *work) { if (!cfg80211_is_all_idle()) return; regulatory_hint_disconnect(); } static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work); static int cfg80211_conn_scan(struct wireless_dev *wdev) { struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); struct cfg80211_scan_request *request; int n_channels, err; ASSERT_RTNL(); ASSERT_RDEV_LOCK(rdev); ASSERT_WDEV_LOCK(wdev); if (rdev->scan_req) return -EBUSY; if (wdev->conn->params.channel) { n_channels = 1; } else { enum ieee80211_band band; n_channels = 0; for (band = 0; band < IEEE80211_NUM_BANDS; band++) { if (!wdev->wiphy->bands[band]) continue; n_channels += wdev->wiphy->bands[band]->n_channels; } } 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) request->channels[0] = wdev->conn->params.channel; else { int i = 0, j; enum ieee80211_band band; struct ieee80211_supported_band *bands; struct ieee80211_channel *channel; for (band = 0; band < IEEE80211_NUM_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; request->dev = wdev->netdev; request->wiphy = &rdev->wiphy; rdev->scan_req = request; err = rdev->ops->scan(wdev->wiphy, wdev->netdev, request); if (!err) { wdev->conn->state = CFG80211_CONN_SCANNING; nl80211_send_scan_start(rdev, wdev->netdev); dev_hold(wdev->netdev); } else { rdev->scan_req = NULL; kfree(request); } return err; } static int cfg80211_conn_do_work(struct wireless_dev *wdev) { struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); struct cfg80211_connect_params *params; const u8 *prev_bssid = NULL; int err; ASSERT_WDEV_LOCK(wdev); if (!wdev->conn) return 0; params = &wdev->conn->params; switch (wdev->conn->state) { case CFG80211_CONN_SCAN_AGAIN: return cfg80211_conn_scan(wdev); case CFG80211_CONN_AUTHENTICATE_NEXT: BUG_ON(!rdev->ops->auth); wdev->conn->state = CFG80211_CONN_AUTHENTICATING; return __cfg80211_mlme_auth(rdev, wdev->netdev, params->channel, params->auth_type, params->bssid, params->ssid, params->ssid_len, NULL, 0, params->key, params->key_len, params->key_idx, false); case CFG80211_CONN_ASSOCIATE_NEXT: BUG_ON(!rdev->ops->assoc); wdev->conn->state = CFG80211_CONN_ASSOCIATING; if (wdev->conn->prev_bssid_valid) prev_bssid = wdev->conn->prev_bssid; err = __cfg80211_mlme_assoc(rdev, wdev->netdev, params->channel, params->bssid, prev_bssid, params->ssid, params->ssid_len, params->ie, params->ie_len, false, ¶ms->crypto); if (err) __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, NULL, 0, WLAN_REASON_DEAUTH_LEAVING, false); return err; case CFG80211_CONN_DEAUTH_ASSOC_FAIL: __cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid, NULL, 0, WLAN_REASON_DEAUTH_LEAVING, false); /* return an error so that we call __cfg80211_connect_result() */ return -EINVAL; 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; rtnl_lock(); cfg80211_lock_rdev(rdev); mutex_lock(&rdev->devlist_mtx); list_for_each_entry(wdev, &rdev->netdev_list, list) { wdev_lock(wdev); if (!netif_running(wdev->netdev)) { wdev_unlock(wdev); continue; } if (wdev->sme_state != CFG80211_SME_CONNECTING) { wdev_unlock(wdev); continue; } if (wdev->conn->params.bssid) { memcpy(bssid_buf, wdev->conn->params.bssid, ETH_ALEN); bssid = bssid_buf; } if (cfg80211_conn_do_work(wdev)) __cfg80211_connect_result( wdev->netdev, bssid, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, false, NULL); wdev_unlock(wdev); } mutex_unlock(&rdev->devlist_mtx); cfg80211_unlock_rdev(rdev); rtnl_unlock(); } static struct cfg80211_bss *cfg80211_get_conn_bss(struct wireless_dev *wdev) { struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); struct cfg80211_bss *bss; u16 capa = WLAN_CAPABILITY_ESS; ASSERT_WDEV_LOCK(wdev); if (wdev->conn->params.privacy) capa |= WLAN_CAPABILITY_PRIVACY; bss = cfg80211_get_bss(wdev->wiphy, wdev->conn->params.channel, wdev->conn->params.bssid, wdev->conn->params.ssid, wdev->conn->params.ssid_len, WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_PRIVACY, capa); if (!bss) return NULL; memcpy(wdev->conn->bssid, bss->bssid, ETH_ALEN); wdev->conn->params.bssid = wdev->conn->bssid; wdev->conn->params.channel = bss->channel; wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; 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_dev(wdev->wiphy); struct cfg80211_bss *bss; ASSERT_WDEV_LOCK(wdev); if (wdev->sme_state != CFG80211_SME_CONNECTING) return; 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(bss); } else { /* not found */ if (wdev->conn->state == CFG80211_CONN_SCAN_AGAIN) schedule_work(&rdev->conn_work); else __cfg80211_connect_result( wdev->netdev, wdev->conn->params.bssid, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, false, NULL); } } void cfg80211_sme_scan_done(struct net_device *dev) { struct wireless_dev *wdev = dev->ieee80211_ptr; mutex_lock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); wdev_lock(wdev); __cfg80211_sme_scan_done(dev); wdev_unlock(wdev); mutex_unlock(&wiphy_to_dev(wdev->wiphy)->devlist_mtx); } void cfg80211_sme_rx_auth(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; u16 status_code = le16_to_cpu(mgmt->u.auth.status_code); ASSERT_WDEV_LOCK(wdev); /* should only RX auth frames when connecting */ if (wdev->sme_state != CFG80211_SME_CONNECTING) return; if (WARN_ON(!wdev->conn)) 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) { __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, status_code, false, NULL); } else if (wdev->sme_state == CFG80211_SME_CONNECTING && wdev->conn->state == CFG80211_CONN_AUTHENTICATING) { wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; schedule_work(&rdev->conn_work); } } bool cfg80211_sme_failed_reassoc(struct wireless_dev *wdev) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); if (WARN_ON(!wdev->conn)) return false; if (!wdev->conn->prev_bssid_valid) return false; /* * Some stupid APs don't accept reassoc, so we * need to fall back to trying regular assoc. */ wdev->conn->prev_bssid_valid = false; wdev->conn->state = CFG80211_CONN_ASSOCIATE_NEXT; schedule_work(&rdev->conn_work); return true; } void cfg80211_sme_failed_assoc(struct wireless_dev *wdev) { struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); wdev->conn->state = CFG80211_CONN_DEAUTH_ASSOC_FAIL; schedule_work(&rdev->conn_work); } void __cfg80211_connect_result(struct net_device *dev, const u8 *bssid, const u8 *req_ie, size_t req_ie_len, const u8 *resp_ie, size_t resp_ie_len, u16 status, bool wextev, struct cfg80211_bss *bss) { struct wireless_dev *wdev = dev->ieee80211_ptr; u8 *country_ie; #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; if (wdev->sme_state != CFG80211_SME_CONNECTING) return; nl80211_send_connect_result(wiphy_to_dev(wdev->wiphy), dev, bssid, req_ie, req_ie_len, resp_ie, resp_ie_len, status, GFP_KERNEL); #ifdef CONFIG_CFG80211_WEXT if (wextev) { if (req_ie && status == WLAN_STATUS_SUCCESS) { memset(&wrqu, 0, sizeof(wrqu)); wrqu.data.length = req_ie_len; wireless_send_event(dev, IWEVASSOCREQIE, &wrqu, req_ie); } if (resp_ie && status == WLAN_STATUS_SUCCESS) { memset(&wrqu, 0, sizeof(wrqu)); wrqu.data.length = resp_ie_len; wireless_send_event(dev, IWEVASSOCRESPIE, &wrqu, resp_ie); } memset(&wrqu, 0, sizeof(wrqu)); wrqu.ap_addr.sa_family = ARPHRD_ETHER; if (bssid && status == WLAN_STATUS_SUCCESS) { memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); wdev->wext.prev_bssid_valid = true; } wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL); } #endif if (wdev->current_bss) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); wdev->current_bss = NULL; } if (wdev->conn) wdev->conn->state = CFG80211_CONN_IDLE; if (status != WLAN_STATUS_SUCCESS) { wdev->sme_state = CFG80211_SME_IDLE; if (wdev->conn) kfree(wdev->conn->ie); kfree(wdev->conn); wdev->conn = NULL; kfree(wdev->connect_keys); wdev->connect_keys = NULL; wdev->ssid_len = 0; return; } if (!bss) bss = cfg80211_get_bss(wdev->wiphy, wdev->conn ? wdev->conn->params.channel : NULL, bssid, wdev->ssid, wdev->ssid_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); if (WARN_ON(!bss)) return; cfg80211_hold_bss(bss_from_pub(bss)); wdev->current_bss = bss_from_pub(bss); wdev->sme_state = CFG80211_SME_CONNECTED; cfg80211_upload_connect_keys(wdev); country_ie = (u8 *) ieee80211_bss_get_ie(bss, WLAN_EID_COUNTRY); if (!country_ie) return; /* * ieee80211_bss_get_ie() ensures we can access: * - country_ie + 2, the start of the country ie data, and * - and country_ie[1] which is the IE length */ regulatory_hint_11d(wdev->wiphy, bss->channel->band, country_ie + 2, country_ie[1]); } void cfg80211_connect_result(struct net_device *dev, const u8 *bssid, const u8 *req_ie, size_t req_ie_len, const u8 *resp_ie, size_t resp_ie_len, u16 status, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); struct cfg80211_event *ev; unsigned long flags; CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTING); ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); if (!ev) return; ev->type = EVENT_CONNECT_RESULT; if (bssid) memcpy(ev->cr.bssid, bssid, ETH_ALEN); if (req_ie_len) { ev->cr.req_ie = ((u8 *)ev) + sizeof(*ev); ev->cr.req_ie_len = req_ie_len; memcpy((void *)ev->cr.req_ie, req_ie, req_ie_len); } if (resp_ie_len) { ev->cr.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; ev->cr.resp_ie_len = resp_ie_len; memcpy((void *)ev->cr.resp_ie, resp_ie, resp_ie_len); } ev->cr.status = status; 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_result); void __cfg80211_roamed(struct wireless_dev *wdev, struct ieee80211_channel *channel, const u8 *bssid, const u8 *req_ie, size_t req_ie_len, const u8 *resp_ie, size_t resp_ie_len) { struct cfg80211_bss *bss; #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; if (wdev->sme_state != CFG80211_SME_CONNECTED) return; /* internal error -- how did we get to CONNECTED w/o BSS? */ if (WARN_ON(!wdev->current_bss)) { return; } cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); wdev->current_bss = NULL; bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, wdev->ssid, wdev->ssid_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); if (WARN_ON(!bss)) return; cfg80211_hold_bss(bss_from_pub(bss)); wdev->current_bss = bss_from_pub(bss); nl80211_send_roamed(wiphy_to_dev(wdev->wiphy), wdev->netdev, bssid, req_ie, req_ie_len, resp_ie, resp_ie_len, GFP_KERNEL); #ifdef CONFIG_CFG80211_WEXT if (req_ie) { memset(&wrqu, 0, sizeof(wrqu)); wrqu.data.length = req_ie_len; wireless_send_event(wdev->netdev, IWEVASSOCREQIE, &wrqu, req_ie); } if (resp_ie) { memset(&wrqu, 0, sizeof(wrqu)); wrqu.data.length = resp_ie_len; wireless_send_event(wdev->netdev, IWEVASSOCRESPIE, &wrqu, resp_ie); } memset(&wrqu, 0, sizeof(wrqu)); wrqu.ap_addr.sa_family = ARPHRD_ETHER; memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN); memcpy(wdev->wext.prev_bssid, bssid, ETH_ALEN); wdev->wext.prev_bssid_valid = true; wireless_send_event(wdev->netdev, SIOCGIWAP, &wrqu, NULL); #endif } void cfg80211_roamed(struct net_device *dev, struct ieee80211_channel *channel, const u8 *bssid, const u8 *req_ie, size_t req_ie_len, const u8 *resp_ie, size_t resp_ie_len, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); struct cfg80211_event *ev; unsigned long flags; CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); ev = kzalloc(sizeof(*ev) + req_ie_len + resp_ie_len, gfp); if (!ev) return; ev->type = EVENT_ROAMED; ev->rm.channel = channel; memcpy(ev->rm.bssid, bssid, ETH_ALEN); ev->rm.req_ie = ((u8 *)ev) + sizeof(*ev); ev->rm.req_ie_len = req_ie_len; memcpy((void *)ev->rm.req_ie, req_ie, req_ie_len); ev->rm.resp_ie = ((u8 *)ev) + sizeof(*ev) + req_ie_len; ev->rm.resp_ie_len = resp_ie_len; memcpy((void *)ev->rm.resp_ie, resp_ie, resp_ie_len); 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_roamed); 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_dev(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; if (wdev->sme_state != CFG80211_SME_CONNECTED) return; if (wdev->current_bss) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); } wdev->current_bss = NULL; wdev->sme_state = CFG80211_SME_IDLE; wdev->ssid_len = 0; if (wdev->conn) { const u8 *bssid; int ret; kfree(wdev->conn->ie); wdev->conn->ie = NULL; kfree(wdev->conn); wdev->conn = NULL; /* * If this disconnect was due to a disassoc, we * we might still have an auth BSS around. For * the userspace SME that's currently expected, * but for the kernel SME (nl80211 CONNECT or * wireless extensions) we want to clear up all * state. */ for (i = 0; i < MAX_AUTH_BSSES; i++) { if (!wdev->auth_bsses[i]) continue; bssid = wdev->auth_bsses[i]->pub.bssid; ret = __cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, WLAN_REASON_DEAUTH_LEAVING, false); WARN(ret, "deauth failed: %d\n", ret); } } nl80211_send_disconnected(rdev, dev, reason, ie, ie_len, from_ap); /* * Delete all the keys ... pairwise keys can't really * exist any more anyway, but default keys might. */ if (rdev->ops->del_key) for (i = 0; i < 6; i++) rdev->ops->del_key(wdev->wiphy, dev, i, false, 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, u8 *ie, size_t ie_len, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); struct cfg80211_event *ev; unsigned long flags; CFG80211_DEV_WARN_ON(wdev->sme_state != CFG80211_SME_CONNECTED); 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; 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); 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; struct cfg80211_bss *bss = NULL; int err; ASSERT_WDEV_LOCK(wdev); if (wdev->sme_state != CFG80211_SME_IDLE) return -EALREADY; if (WARN_ON(wdev->connect_keys)) { kfree(wdev->connect_keys); wdev->connect_keys = NULL; } 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; } } } if (!rdev->ops->connect) { if (!rdev->ops->auth || !rdev->ops->assoc) return -EOPNOTSUPP; if (WARN_ON(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 (connect->ie) { wdev->conn->ie = kmemdup(connect->ie, connect->ie_len, GFP_KERNEL); wdev->conn->params.ie = wdev->conn->ie; if (!wdev->conn->ie) { kfree(wdev->conn); wdev->conn = NULL; return -ENOMEM; } } 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; } memcpy(wdev->ssid, connect->ssid, connect->ssid_len); wdev->ssid_len = connect->ssid_len; wdev->conn->params.ssid = wdev->ssid; wdev->conn->params.ssid_len = connect->ssid_len; /* see if we have the bss already */ bss = cfg80211_get_conn_bss(wdev); wdev->sme_state = CFG80211_SME_CONNECTING; wdev->connect_keys = connkeys; 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) { wdev->conn->state = CFG80211_CONN_AUTHENTICATE_NEXT; err = cfg80211_conn_do_work(wdev); cfg80211_put_bss(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) { kfree(wdev->conn->ie); kfree(wdev->conn); wdev->conn = NULL; wdev->sme_state = CFG80211_SME_IDLE; wdev->connect_keys = NULL; wdev->ssid_len = 0; } return err; } else { wdev->sme_state = CFG80211_SME_CONNECTING; wdev->connect_keys = connkeys; err = rdev->ops->connect(&rdev->wiphy, dev, connect); if (err) { wdev->connect_keys = NULL; wdev->sme_state = CFG80211_SME_IDLE; return err; } memcpy(wdev->ssid, connect->ssid, connect->ssid_len); wdev->ssid_len = connect->ssid_len; return 0; } } int cfg80211_connect(struct cfg80211_registered_device *rdev, struct net_device *dev, struct cfg80211_connect_params *connect, struct cfg80211_cached_keys *connkeys) { int err; mutex_lock(&rdev->devlist_mtx); wdev_lock(dev->ieee80211_ptr); err = __cfg80211_connect(rdev, dev, connect, connkeys, NULL); wdev_unlock(dev->ieee80211_ptr); mutex_unlock(&rdev->devlist_mtx); return err; } 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; ASSERT_WDEV_LOCK(wdev); if (wdev->sme_state == CFG80211_SME_IDLE) return -EINVAL; kfree(wdev->connect_keys); wdev->connect_keys = NULL; if (!rdev->ops->disconnect) { if (!rdev->ops->deauth) return -EOPNOTSUPP; /* was it connected by userspace SME? */ if (!wdev->conn) { cfg80211_mlme_down(rdev, dev); return 0; } if (wdev->sme_state == CFG80211_SME_CONNECTING && (wdev->conn->state == CFG80211_CONN_SCANNING || wdev->conn->state == CFG80211_CONN_SCAN_AGAIN)) { wdev->sme_state = CFG80211_SME_IDLE; kfree(wdev->conn->ie); kfree(wdev->conn); wdev->conn = NULL; wdev->ssid_len = 0; return 0; } /* wdev->conn->params.bssid must be set if > SCANNING */ err = __cfg80211_mlme_deauth(rdev, dev, wdev->conn->params.bssid, NULL, 0, reason, false); if (err) return err; } else { err = rdev->ops->disconnect(&rdev->wiphy, dev, reason); if (err) return err; } if (wdev->sme_state == CFG80211_SME_CONNECTED) __cfg80211_disconnected(dev, NULL, 0, 0, false); else if (wdev->sme_state == CFG80211_SME_CONNECTING) __cfg80211_connect_result(dev, NULL, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, wextev, NULL); return 0; } int cfg80211_disconnect(struct cfg80211_registered_device *rdev, struct net_device *dev, u16 reason, bool wextev) { int err; wdev_lock(dev->ieee80211_ptr); err = __cfg80211_disconnect(rdev, dev, reason, wextev); wdev_unlock(dev->ieee80211_ptr); return err; } void cfg80211_sme_disassoc(struct net_device *dev, int idx) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); u8 bssid[ETH_ALEN]; ASSERT_WDEV_LOCK(wdev); if (!wdev->conn) return; if (wdev->conn->state == CFG80211_CONN_IDLE) return; /* * Ok, so the association was made by this SME -- we don't * want it any more so deauthenticate too. */ if (!wdev->auth_bsses[idx]) return; memcpy(bssid, wdev->auth_bsses[idx]->pub.bssid, ETH_ALEN); if (__cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0, WLAN_REASON_DEAUTH_LEAVING, false)) { /* whatever -- assume gone anyway */ cfg80211_unhold_bss(wdev->auth_bsses[idx]); cfg80211_put_bss(&wdev->auth_bsses[idx]->pub); wdev->auth_bsses[idx] = NULL; } }