/* * cfg80211 MLME SAP interface * * Copyright (c) 2009, Jouni Malinen <j@w1.fi> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/nl80211.h> #include <linux/wireless.h> #include <net/cfg80211.h> #include <net/iw_handler.h> #include "core.h" #include "nl80211.h" void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; u8 *bssid = mgmt->bssid; int i; u16 status = le16_to_cpu(mgmt->u.auth.status_code); bool done = false; wdev_lock(wdev); for (i = 0; i < MAX_AUTH_BSSES; i++) { if (wdev->authtry_bsses[i] && memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) { if (status == WLAN_STATUS_SUCCESS) { wdev->auth_bsses[i] = wdev->authtry_bsses[i]; } else { cfg80211_unhold_bss(wdev->authtry_bsses[i]); cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); } wdev->authtry_bsses[i] = NULL; done = true; break; } } WARN_ON(!done); nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL); cfg80211_sme_rx_auth(dev, buf, len); wdev_unlock(wdev); } EXPORT_SYMBOL(cfg80211_send_rx_auth); void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len) { u16 status_code; struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; u8 *ie = mgmt->u.assoc_resp.variable; int i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); struct cfg80211_internal_bss *bss = NULL; wdev_lock(wdev); status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); /* * This is a bit of a hack, we don't notify userspace of * a (re-)association reply if we tried to send a reassoc * and got a reject -- we only try again with an assoc * frame instead of reassoc. */ if (status_code != WLAN_STATUS_SUCCESS && wdev->conn && cfg80211_sme_failed_reassoc(wdev)) goto out; nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL); if (status_code == WLAN_STATUS_SUCCESS) { for (i = 0; i < MAX_AUTH_BSSES; i++) { if (!wdev->auth_bsses[i]) continue; if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid, ETH_ALEN) == 0) { bss = wdev->auth_bsses[i]; wdev->auth_bsses[i] = NULL; /* additional reference to drop hold */ cfg80211_ref_bss(bss); break; } } /* * We might be coming here because the driver reported * a successful association at the same time as the * user requested a deauth. In that case, we will have * removed the BSS from the auth_bsses list due to the * deauth request when the assoc response makes it. If * the two code paths acquire the lock the other way * around, that's just the standard situation of a * deauth being requested while connected. */ if (!bss) goto out; } else if (wdev->conn) { cfg80211_sme_failed_assoc(wdev); /* * do not call connect_result() now because the * sme will schedule work that does it later. */ goto out; } if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) { /* * This is for the userspace SME, the CONNECTING * state will be changed to CONNECTED by * __cfg80211_connect_result() below. */ wdev->sme_state = CFG80211_SME_CONNECTING; } /* this consumes one bss reference (unless bss is NULL) */ __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs, status_code, status_code == WLAN_STATUS_SUCCESS, bss ? &bss->pub : NULL); /* drop hold now, and also reference acquired above */ if (bss) { cfg80211_unhold_bss(bss); cfg80211_put_bss(&bss->pub); } out: wdev_unlock(wdev); } EXPORT_SYMBOL(cfg80211_send_rx_assoc); void __cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; const u8 *bssid = mgmt->bssid; int i; bool found = false; ASSERT_WDEV_LOCK(wdev); if (wdev->current_bss && memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); wdev->current_bss = NULL; found = true; } else for (i = 0; i < MAX_AUTH_BSSES; i++) { if (wdev->auth_bsses[i] && memcmp(wdev->auth_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) { cfg80211_unhold_bss(wdev->auth_bsses[i]); cfg80211_put_bss(&wdev->auth_bsses[i]->pub); wdev->auth_bsses[i] = NULL; found = true; break; } if (wdev->authtry_bsses[i] && memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) { cfg80211_unhold_bss(wdev->authtry_bsses[i]); cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); wdev->authtry_bsses[i] = NULL; found = true; break; } } if (!found) return; nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL); if (wdev->sme_state == CFG80211_SME_CONNECTED) { u16 reason_code; bool from_ap; reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0; __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); } else if (wdev->sme_state == CFG80211_SME_CONNECTING) { __cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, false, NULL); } } EXPORT_SYMBOL(__cfg80211_send_deauth); void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; wdev_lock(wdev); __cfg80211_send_deauth(dev, buf, len); wdev_unlock(wdev); } EXPORT_SYMBOL(cfg80211_send_deauth); void __cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf; const u8 *bssid = mgmt->bssid; int i; u16 reason_code; bool from_ap; bool done = false; ASSERT_WDEV_LOCK(wdev); nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL); if (wdev->sme_state != CFG80211_SME_CONNECTED) return; if (wdev->current_bss && memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { for (i = 0; i < MAX_AUTH_BSSES; i++) { if (wdev->authtry_bsses[i] || wdev->auth_bsses[i]) continue; wdev->auth_bsses[i] = wdev->current_bss; wdev->current_bss = NULL; done = true; cfg80211_sme_disassoc(dev, i); break; } WARN_ON(!done); } else WARN_ON(1); reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0; __cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap); } EXPORT_SYMBOL(__cfg80211_send_disassoc); void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len) { struct wireless_dev *wdev = dev->ieee80211_ptr; wdev_lock(wdev); __cfg80211_send_disassoc(dev, buf, len); wdev_unlock(wdev); } EXPORT_SYMBOL(cfg80211_send_disassoc); static void __cfg80211_auth_remove(struct wireless_dev *wdev, const u8 *addr) { int i; bool done = false; ASSERT_WDEV_LOCK(wdev); for (i = 0; addr && i < MAX_AUTH_BSSES; i++) { if (wdev->authtry_bsses[i] && memcmp(wdev->authtry_bsses[i]->pub.bssid, addr, ETH_ALEN) == 0) { cfg80211_unhold_bss(wdev->authtry_bsses[i]); cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); wdev->authtry_bsses[i] = NULL; done = true; break; } } WARN_ON(!done); } void __cfg80211_auth_canceled(struct net_device *dev, const u8 *addr) { __cfg80211_auth_remove(dev->ieee80211_ptr, addr); } EXPORT_SYMBOL(__cfg80211_auth_canceled); void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); wdev_lock(wdev); nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL); if (wdev->sme_state == CFG80211_SME_CONNECTING) __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, false, NULL); __cfg80211_auth_remove(wdev, addr); wdev_unlock(wdev); } EXPORT_SYMBOL(cfg80211_send_auth_timeout); void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); int i; bool done = false; wdev_lock(wdev); nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL); if (wdev->sme_state == CFG80211_SME_CONNECTING) __cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0, WLAN_STATUS_UNSPECIFIED_FAILURE, false, NULL); for (i = 0; addr && i < MAX_AUTH_BSSES; i++) { if (wdev->auth_bsses[i] && memcmp(wdev->auth_bsses[i]->pub.bssid, addr, ETH_ALEN) == 0) { cfg80211_unhold_bss(wdev->auth_bsses[i]); cfg80211_put_bss(&wdev->auth_bsses[i]->pub); wdev->auth_bsses[i] = NULL; done = true; break; } } WARN_ON(!done); wdev_unlock(wdev); } EXPORT_SYMBOL(cfg80211_send_assoc_timeout); void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr, enum nl80211_key_type key_type, int key_id, const u8 *tsc, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); #ifdef CONFIG_CFG80211_WEXT union iwreq_data wrqu; char *buf = kmalloc(128, gfp); if (buf) { sprintf(buf, "MLME-MICHAELMICFAILURE.indication(" "keyid=%d %scast addr=%pM)", key_id, key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni", addr); memset(&wrqu, 0, sizeof(wrqu)); wrqu.data.length = strlen(buf); wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf); kfree(buf); } #endif nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp); } EXPORT_SYMBOL(cfg80211_michael_mic_failure); /* some MLME handling for userspace SME */ int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_auth_type auth_type, const u8 *bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, const u8 *key, int key_len, int key_idx) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_auth_request req; struct cfg80211_internal_bss *bss; int i, err, slot = -1, nfree = 0; ASSERT_WDEV_LOCK(wdev); if (auth_type == NL80211_AUTHTYPE_SHARED_KEY) if (!key || !key_len || key_idx < 0 || key_idx > 4) return -EINVAL; if (wdev->current_bss && memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0) return -EALREADY; for (i = 0; i < MAX_AUTH_BSSES; i++) { if (wdev->authtry_bsses[i] && memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) return -EALREADY; if (wdev->auth_bsses[i] && memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) return -EALREADY; } memset(&req, 0, sizeof(req)); req.ie = ie; req.ie_len = ie_len; req.auth_type = auth_type; req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); req.key = key; req.key_len = key_len; req.key_idx = key_idx; if (!req.bss) return -ENOENT; bss = bss_from_pub(req.bss); for (i = 0; i < MAX_AUTH_BSSES; i++) { if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) { slot = i; nfree++; } } /* we need one free slot for disassoc and one for this auth */ if (nfree < 2) { err = -ENOSPC; goto out; } wdev->authtry_bsses[slot] = bss; cfg80211_hold_bss(bss); err = rdev->ops->auth(&rdev->wiphy, dev, &req); if (err) { wdev->authtry_bsses[slot] = NULL; cfg80211_unhold_bss(bss); } out: if (err) cfg80211_put_bss(req.bss); return err; } int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_auth_type auth_type, const u8 *bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, const u8 *key, int key_len, int key_idx) { int err; wdev_lock(dev->ieee80211_ptr); err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid, ssid, ssid_len, ie, ie_len, key, key_len, key_idx); wdev_unlock(dev->ieee80211_ptr); return err; } int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, const u8 *bssid, const u8 *prev_bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, bool use_mfp, struct cfg80211_crypto_settings *crypt) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_assoc_request req; struct cfg80211_internal_bss *bss; int i, err, slot = -1; bool was_connected = false; ASSERT_WDEV_LOCK(wdev); memset(&req, 0, sizeof(req)); if (wdev->current_bss && prev_bssid && memcmp(wdev->current_bss->pub.bssid, prev_bssid, ETH_ALEN) == 0) { /* * Trying to reassociate: Allow this to proceed and let the old * association to be dropped when the new one is completed. */ if (wdev->sme_state == CFG80211_SME_CONNECTED) { was_connected = true; wdev->sme_state = CFG80211_SME_CONNECTING; } } else if (wdev->current_bss) return -EALREADY; req.ie = ie; req.ie_len = ie_len; memcpy(&req.crypto, crypt, sizeof(req.crypto)); req.use_mfp = use_mfp; req.prev_bssid = prev_bssid; req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len, WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS); if (!req.bss) { if (was_connected) wdev->sme_state = CFG80211_SME_CONNECTED; return -ENOENT; } bss = bss_from_pub(req.bss); for (i = 0; i < MAX_AUTH_BSSES; i++) { if (bss == wdev->auth_bsses[i]) { slot = i; break; } } if (slot < 0) { err = -ENOTCONN; goto out; } err = rdev->ops->assoc(&rdev->wiphy, dev, &req); out: if (err && was_connected) wdev->sme_state = CFG80211_SME_CONNECTED; /* still a reference in wdev->auth_bsses[slot] */ cfg80211_put_bss(req.bss); return err; } int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, const u8 *bssid, const u8 *prev_bssid, const u8 *ssid, int ssid_len, const u8 *ie, int ie_len, bool use_mfp, struct cfg80211_crypto_settings *crypt) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; wdev_lock(wdev); err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid, ssid, ssid_len, ie, ie_len, use_mfp, crypt); wdev_unlock(wdev); 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) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_deauth_request req; int i; ASSERT_WDEV_LOCK(wdev); memset(&req, 0, sizeof(req)); req.reason_code = reason; req.ie = ie; req.ie_len = ie_len; if (wdev->current_bss && memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) { req.bss = &wdev->current_bss->pub; } else for (i = 0; i < MAX_AUTH_BSSES; i++) { if (wdev->auth_bsses[i] && memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) { req.bss = &wdev->auth_bsses[i]->pub; break; } if (wdev->authtry_bsses[i] && memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) { req.bss = &wdev->authtry_bsses[i]->pub; break; } } if (!req.bss) return -ENOTCONN; return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); } int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; wdev_lock(wdev); err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason); wdev_unlock(wdev); return err; } static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_disassoc_request req; ASSERT_WDEV_LOCK(wdev); if (wdev->sme_state != CFG80211_SME_CONNECTED) return -ENOTCONN; if (WARN_ON(!wdev->current_bss)) return -ENOTCONN; memset(&req, 0, sizeof(req)); req.reason_code = reason; req.ie = ie; req.ie_len = ie_len; if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) req.bss = &wdev->current_bss->pub; else return -ENOTCONN; return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev); } int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev, struct net_device *dev, const u8 *bssid, const u8 *ie, int ie_len, u16 reason) { struct wireless_dev *wdev = dev->ieee80211_ptr; int err; wdev_lock(wdev); err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason); wdev_unlock(wdev); return err; } void cfg80211_mlme_down(struct cfg80211_registered_device *rdev, struct net_device *dev) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct cfg80211_deauth_request req; int i; ASSERT_WDEV_LOCK(wdev); if (!rdev->ops->deauth) return; memset(&req, 0, sizeof(req)); req.reason_code = WLAN_REASON_DEAUTH_LEAVING; req.ie = NULL; req.ie_len = 0; if (wdev->current_bss) { req.bss = &wdev->current_bss->pub; rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); if (wdev->current_bss) { cfg80211_unhold_bss(wdev->current_bss); cfg80211_put_bss(&wdev->current_bss->pub); wdev->current_bss = NULL; } } for (i = 0; i < MAX_AUTH_BSSES; i++) { if (wdev->auth_bsses[i]) { req.bss = &wdev->auth_bsses[i]->pub; rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); if (wdev->auth_bsses[i]) { cfg80211_unhold_bss(wdev->auth_bsses[i]); cfg80211_put_bss(&wdev->auth_bsses[i]->pub); wdev->auth_bsses[i] = NULL; } } if (wdev->authtry_bsses[i]) { req.bss = &wdev->authtry_bsses[i]->pub; rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev); if (wdev->authtry_bsses[i]) { cfg80211_unhold_bss(wdev->authtry_bsses[i]); cfg80211_put_bss(&wdev->authtry_bsses[i]->pub); wdev->authtry_bsses[i] = NULL; } } } } void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type, unsigned int duration, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); nl80211_send_remain_on_channel(rdev, dev, cookie, chan, channel_type, duration, gfp); } EXPORT_SYMBOL(cfg80211_ready_on_channel); void cfg80211_remain_on_channel_expired(struct net_device *dev, u64 cookie, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); nl80211_send_remain_on_channel_cancel(rdev, dev, cookie, chan, channel_type, gfp); } EXPORT_SYMBOL(cfg80211_remain_on_channel_expired); void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr, struct station_info *sinfo, gfp_t gfp) { struct wiphy *wiphy = dev->ieee80211_ptr->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp); } EXPORT_SYMBOL(cfg80211_new_sta); struct cfg80211_action_registration { struct list_head list; u32 nlpid; int match_len; u8 match[]; }; int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid, const u8 *match_data, int match_len) { struct cfg80211_action_registration *reg, *nreg; int err = 0; nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL); if (!nreg) return -ENOMEM; spin_lock_bh(&wdev->action_registrations_lock); list_for_each_entry(reg, &wdev->action_registrations, list) { int mlen = min(match_len, reg->match_len); if (memcmp(reg->match, match_data, mlen) == 0) { err = -EALREADY; break; } } if (err) { kfree(nreg); goto out; } memcpy(nreg->match, match_data, match_len); nreg->match_len = match_len; nreg->nlpid = snd_pid; list_add(&nreg->list, &wdev->action_registrations); out: spin_unlock_bh(&wdev->action_registrations_lock); return err; } void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid) { struct cfg80211_action_registration *reg, *tmp; spin_lock_bh(&wdev->action_registrations_lock); list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) { if (reg->nlpid == nlpid) { list_del(®->list); kfree(reg); } } spin_unlock_bh(&wdev->action_registrations_lock); } void cfg80211_mlme_purge_actions(struct wireless_dev *wdev) { struct cfg80211_action_registration *reg, *tmp; spin_lock_bh(&wdev->action_registrations_lock); list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) { list_del(®->list); kfree(reg); } spin_unlock_bh(&wdev->action_registrations_lock); } int cfg80211_mlme_action(struct cfg80211_registered_device *rdev, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type, const u8 *buf, size_t len, u64 *cookie) { struct wireless_dev *wdev = dev->ieee80211_ptr; const struct ieee80211_mgmt *mgmt; if (rdev->ops->action == NULL) return -EOPNOTSUPP; if (len < 24 + 1) return -EINVAL; mgmt = (const struct ieee80211_mgmt *) buf; if (!ieee80211_is_action(mgmt->frame_control)) return -EINVAL; if (mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) { /* Verify that we are associated with the destination AP */ if (!wdev->current_bss || memcmp(wdev->current_bss->pub.bssid, mgmt->bssid, ETH_ALEN) != 0 || memcmp(wdev->current_bss->pub.bssid, mgmt->da, ETH_ALEN) != 0) return -ENOTCONN; } if (memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0) return -EINVAL; /* Transmit the Action frame as requested by user space */ return rdev->ops->action(&rdev->wiphy, dev, chan, channel_type, buf, len, cookie); } bool cfg80211_rx_action(struct net_device *dev, int freq, const u8 *buf, size_t len, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); struct cfg80211_action_registration *reg; const u8 *action_data; int action_data_len; bool result = false; /* frame length - min size excluding category */ action_data_len = len - (IEEE80211_MIN_ACTION_SIZE - 1); /* action data starts with category */ action_data = buf + IEEE80211_MIN_ACTION_SIZE - 1; spin_lock_bh(&wdev->action_registrations_lock); list_for_each_entry(reg, &wdev->action_registrations, list) { if (reg->match_len > action_data_len) continue; if (memcmp(reg->match, action_data, reg->match_len)) continue; /* found match! */ /* Indicate the received Action frame to user space */ if (nl80211_send_action(rdev, dev, reg->nlpid, freq, buf, len, gfp)) continue; result = true; break; } spin_unlock_bh(&wdev->action_registrations_lock); return result; } EXPORT_SYMBOL(cfg80211_rx_action); void cfg80211_action_tx_status(struct net_device *dev, u64 cookie, const u8 *buf, size_t len, bool ack, gfp_t gfp) { struct wireless_dev *wdev = dev->ieee80211_ptr; struct wiphy *wiphy = wdev->wiphy; struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); /* Indicate TX status of the Action frame to user space */ nl80211_send_action_tx_status(rdev, dev, cookie, buf, len, ack, gfp); } EXPORT_SYMBOL(cfg80211_action_tx_status);