![Vladimir Kondratiev](/assets/img/avatar_default.png)
In the cfg80211_rx_mgmt(), parameter @gfp was used for the memory allocation. But, memory get allocated under spin_lock_bh(), this implies atomic context. So, one can't use GFP_KERNEL, only variants with no __GFP_WAIT. Actually, in all occurrences GFP_ATOMIC is used (wil6210 use GFP_KERNEL by mistake), and it should be this way or warning triggered in the memory allocation code. Remove @gfp parameter as no actual choice exist, and use hard coded GFP_ATOMIC for memory allocation. Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
784 lines
20 KiB
C
784 lines
20 KiB
C
/*
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* cfg80211 MLME SAP interface
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*
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/etherdevice.h>
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#include <linux/netdevice.h>
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#include <linux/nl80211.h>
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#include <linux/slab.h>
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#include <linux/wireless.h>
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#include <net/cfg80211.h>
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#include <net/iw_handler.h>
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#include "core.h"
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#include "nl80211.h"
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#include "rdev-ops.h"
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void cfg80211_rx_assoc_resp(struct net_device *dev, struct cfg80211_bss *bss,
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const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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u8 *ie = mgmt->u.assoc_resp.variable;
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int ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
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u16 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
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trace_cfg80211_send_rx_assoc(dev, bss);
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/*
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* This is a bit of a hack, we don't notify userspace of
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* a (re-)association reply if we tried to send a reassoc
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* and got a reject -- we only try again with an assoc
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* frame instead of reassoc.
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*/
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if (cfg80211_sme_rx_assoc_resp(wdev, status_code)) {
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cfg80211_unhold_bss(bss_from_pub(bss));
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cfg80211_put_bss(wiphy, bss);
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return;
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}
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nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);
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/* update current_bss etc., consumes the bss reference */
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__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
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status_code,
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status_code == WLAN_STATUS_SUCCESS, bss);
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}
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EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
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static void cfg80211_process_auth(struct wireless_dev *wdev,
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const u8 *buf, size_t len)
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{
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
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cfg80211_sme_rx_auth(wdev, buf, len);
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}
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static void cfg80211_process_deauth(struct wireless_dev *wdev,
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const u8 *buf, size_t len)
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{
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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const u8 *bssid = mgmt->bssid;
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u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
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bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
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nl80211_send_deauth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
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if (!wdev->current_bss ||
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!ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
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return;
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__cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
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cfg80211_sme_deauth(wdev);
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}
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static void cfg80211_process_disassoc(struct wireless_dev *wdev,
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const u8 *buf, size_t len)
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{
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
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const u8 *bssid = mgmt->bssid;
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u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
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bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
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nl80211_send_disassoc(rdev, wdev->netdev, buf, len, GFP_KERNEL);
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if (WARN_ON(!wdev->current_bss ||
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!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
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return;
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__cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
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cfg80211_sme_disassoc(wdev);
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}
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void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct ieee80211_mgmt *mgmt = (void *)buf;
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ASSERT_WDEV_LOCK(wdev);
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trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
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if (WARN_ON(len < 2))
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return;
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if (ieee80211_is_auth(mgmt->frame_control))
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cfg80211_process_auth(wdev, buf, len);
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else if (ieee80211_is_deauth(mgmt->frame_control))
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cfg80211_process_deauth(wdev, buf, len);
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else if (ieee80211_is_disassoc(mgmt->frame_control))
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cfg80211_process_disassoc(wdev, buf, len);
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}
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EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
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void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
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trace_cfg80211_send_auth_timeout(dev, addr);
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nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
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cfg80211_sme_auth_timeout(wdev);
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}
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EXPORT_SYMBOL(cfg80211_auth_timeout);
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void cfg80211_assoc_timeout(struct net_device *dev, struct cfg80211_bss *bss)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
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trace_cfg80211_send_assoc_timeout(dev, bss->bssid);
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nl80211_send_assoc_timeout(rdev, dev, bss->bssid, GFP_KERNEL);
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cfg80211_sme_assoc_timeout(wdev);
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cfg80211_unhold_bss(bss_from_pub(bss));
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cfg80211_put_bss(wiphy, bss);
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}
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EXPORT_SYMBOL(cfg80211_assoc_timeout);
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void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct ieee80211_mgmt *mgmt = (void *)buf;
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ASSERT_WDEV_LOCK(wdev);
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trace_cfg80211_tx_mlme_mgmt(dev, buf, len);
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if (WARN_ON(len < 2))
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return;
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if (ieee80211_is_deauth(mgmt->frame_control))
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cfg80211_process_deauth(wdev, buf, len);
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else
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cfg80211_process_disassoc(wdev, buf, len);
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}
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EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
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void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
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enum nl80211_key_type key_type, int key_id,
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const u8 *tsc, gfp_t gfp)
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{
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struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
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#ifdef CONFIG_CFG80211_WEXT
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union iwreq_data wrqu;
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char *buf = kmalloc(128, gfp);
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if (buf) {
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sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
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"keyid=%d %scast addr=%pM)", key_id,
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key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
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addr);
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memset(&wrqu, 0, sizeof(wrqu));
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wrqu.data.length = strlen(buf);
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wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
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kfree(buf);
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}
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#endif
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trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
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nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
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}
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EXPORT_SYMBOL(cfg80211_michael_mic_failure);
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/* some MLME handling for userspace SME */
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int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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enum nl80211_auth_type auth_type,
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const u8 *bssid,
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const u8 *ssid, int ssid_len,
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const u8 *ie, int ie_len,
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const u8 *key, int key_len, int key_idx,
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const u8 *sae_data, int sae_data_len)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_auth_request req = {
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.ie = ie,
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.ie_len = ie_len,
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.sae_data = sae_data,
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.sae_data_len = sae_data_len,
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.auth_type = auth_type,
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.key = key,
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.key_len = key_len,
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.key_idx = key_idx,
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};
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int err;
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ASSERT_WDEV_LOCK(wdev);
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if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
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if (!key || !key_len || key_idx < 0 || key_idx > 4)
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return -EINVAL;
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if (wdev->current_bss &&
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ether_addr_equal(bssid, wdev->current_bss->pub.bssid))
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return -EALREADY;
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req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
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WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
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if (!req.bss)
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return -ENOENT;
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err = rdev_auth(rdev, dev, &req);
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cfg80211_put_bss(&rdev->wiphy, req.bss);
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return err;
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}
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/* Do a logical ht_capa &= ht_capa_mask. */
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void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
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const struct ieee80211_ht_cap *ht_capa_mask)
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{
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int i;
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u8 *p1, *p2;
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if (!ht_capa_mask) {
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memset(ht_capa, 0, sizeof(*ht_capa));
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return;
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}
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p1 = (u8*)(ht_capa);
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p2 = (u8*)(ht_capa_mask);
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for (i = 0; i<sizeof(*ht_capa); i++)
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p1[i] &= p2[i];
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}
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/* Do a logical ht_capa &= ht_capa_mask. */
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void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
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const struct ieee80211_vht_cap *vht_capa_mask)
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{
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int i;
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u8 *p1, *p2;
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if (!vht_capa_mask) {
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memset(vht_capa, 0, sizeof(*vht_capa));
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return;
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}
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p1 = (u8*)(vht_capa);
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p2 = (u8*)(vht_capa_mask);
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for (i = 0; i < sizeof(*vht_capa); i++)
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p1[i] &= p2[i];
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}
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int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct ieee80211_channel *chan,
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const u8 *bssid,
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const u8 *ssid, int ssid_len,
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struct cfg80211_assoc_request *req)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int err;
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ASSERT_WDEV_LOCK(wdev);
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if (wdev->current_bss &&
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(!req->prev_bssid || !ether_addr_equal(wdev->current_bss->pub.bssid,
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req->prev_bssid)))
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return -EALREADY;
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cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
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rdev->wiphy.ht_capa_mod_mask);
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cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
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rdev->wiphy.vht_capa_mod_mask);
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req->bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
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WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
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if (!req->bss)
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return -ENOENT;
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err = rdev_assoc(rdev, dev, req);
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if (!err)
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cfg80211_hold_bss(bss_from_pub(req->bss));
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else
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cfg80211_put_bss(&rdev->wiphy, req->bss);
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return err;
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}
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int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_deauth_request req = {
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.bssid = bssid,
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.reason_code = reason,
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.ie = ie,
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.ie_len = ie_len,
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.local_state_change = local_state_change,
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};
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ASSERT_WDEV_LOCK(wdev);
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if (local_state_change &&
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(!wdev->current_bss ||
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!ether_addr_equal(wdev->current_bss->pub.bssid, bssid)))
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return 0;
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return rdev_deauth(rdev, dev, &req);
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}
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int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
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struct net_device *dev, const u8 *bssid,
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const u8 *ie, int ie_len, u16 reason,
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bool local_state_change)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_disassoc_request req = {
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.reason_code = reason,
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.local_state_change = local_state_change,
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.ie = ie,
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.ie_len = ie_len,
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};
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int err;
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ASSERT_WDEV_LOCK(wdev);
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if (!wdev->current_bss)
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return -ENOTCONN;
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if (ether_addr_equal(wdev->current_bss->pub.bssid, bssid))
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req.bss = &wdev->current_bss->pub;
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else
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return -ENOTCONN;
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err = rdev_disassoc(rdev, dev, &req);
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if (err)
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return err;
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/* driver should have reported the disassoc */
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WARN_ON(wdev->current_bss);
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return 0;
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}
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void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
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struct net_device *dev)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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u8 bssid[ETH_ALEN];
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ASSERT_WDEV_LOCK(wdev);
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if (!rdev->ops->deauth)
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return;
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if (!wdev->current_bss)
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return;
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memcpy(bssid, wdev->current_bss->pub.bssid, ETH_ALEN);
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cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
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WLAN_REASON_DEAUTH_LEAVING, false);
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}
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struct cfg80211_mgmt_registration {
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struct list_head list;
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u32 nlportid;
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int match_len;
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__le16 frame_type;
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u8 match[];
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};
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int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
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u16 frame_type, const u8 *match_data,
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int match_len)
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{
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struct wiphy *wiphy = wdev->wiphy;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
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struct cfg80211_mgmt_registration *reg, *nreg;
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int err = 0;
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u16 mgmt_type;
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if (!wdev->wiphy->mgmt_stypes)
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return -EOPNOTSUPP;
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if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT)
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return -EINVAL;
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if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE))
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return -EINVAL;
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mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
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if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type)))
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return -EINVAL;
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nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
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if (!nreg)
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return -ENOMEM;
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spin_lock_bh(&wdev->mgmt_registrations_lock);
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list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
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int mlen = min(match_len, reg->match_len);
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if (frame_type != le16_to_cpu(reg->frame_type))
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continue;
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if (memcmp(reg->match, match_data, mlen) == 0) {
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err = -EALREADY;
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break;
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}
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}
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if (err) {
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kfree(nreg);
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goto out;
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}
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memcpy(nreg->match, match_data, match_len);
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nreg->match_len = match_len;
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nreg->nlportid = snd_portid;
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nreg->frame_type = cpu_to_le16(frame_type);
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list_add(&nreg->list, &wdev->mgmt_registrations);
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if (rdev->ops->mgmt_frame_register)
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rdev_mgmt_frame_register(rdev, wdev, frame_type, true);
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out:
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spin_unlock_bh(&wdev->mgmt_registrations_lock);
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|
|
|
return err;
|
|
}
|
|
|
|
void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
|
|
{
|
|
struct wiphy *wiphy = wdev->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
|
struct cfg80211_mgmt_registration *reg, *tmp;
|
|
|
|
spin_lock_bh(&wdev->mgmt_registrations_lock);
|
|
|
|
list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
|
|
if (reg->nlportid != nlportid)
|
|
continue;
|
|
|
|
if (rdev->ops->mgmt_frame_register) {
|
|
u16 frame_type = le16_to_cpu(reg->frame_type);
|
|
|
|
rdev_mgmt_frame_register(rdev, wdev,
|
|
frame_type, false);
|
|
}
|
|
|
|
list_del(®->list);
|
|
kfree(reg);
|
|
}
|
|
|
|
spin_unlock_bh(&wdev->mgmt_registrations_lock);
|
|
|
|
if (nlportid && rdev->crit_proto_nlportid == nlportid) {
|
|
rdev->crit_proto_nlportid = 0;
|
|
rdev_crit_proto_stop(rdev, wdev);
|
|
}
|
|
|
|
if (nlportid == wdev->ap_unexpected_nlportid)
|
|
wdev->ap_unexpected_nlportid = 0;
|
|
}
|
|
|
|
void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
|
|
{
|
|
struct cfg80211_mgmt_registration *reg, *tmp;
|
|
|
|
spin_lock_bh(&wdev->mgmt_registrations_lock);
|
|
|
|
list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
|
|
list_del(®->list);
|
|
kfree(reg);
|
|
}
|
|
|
|
spin_unlock_bh(&wdev->mgmt_registrations_lock);
|
|
}
|
|
|
|
int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
|
|
struct wireless_dev *wdev,
|
|
struct cfg80211_mgmt_tx_params *params, u64 *cookie)
|
|
{
|
|
const struct ieee80211_mgmt *mgmt;
|
|
u16 stype;
|
|
|
|
if (!wdev->wiphy->mgmt_stypes)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!rdev->ops->mgmt_tx)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (params->len < 24 + 1)
|
|
return -EINVAL;
|
|
|
|
mgmt = (const struct ieee80211_mgmt *)params->buf;
|
|
|
|
if (!ieee80211_is_mgmt(mgmt->frame_control))
|
|
return -EINVAL;
|
|
|
|
stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
|
|
if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
|
|
return -EINVAL;
|
|
|
|
if (ieee80211_is_action(mgmt->frame_control) &&
|
|
mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
|
|
int err = 0;
|
|
|
|
wdev_lock(wdev);
|
|
|
|
switch (wdev->iftype) {
|
|
case NL80211_IFTYPE_ADHOC:
|
|
case NL80211_IFTYPE_STATION:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
if (!wdev->current_bss) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
if (!ether_addr_equal(wdev->current_bss->pub.bssid,
|
|
mgmt->bssid)) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* check for IBSS DA must be done by driver as
|
|
* cfg80211 doesn't track the stations
|
|
*/
|
|
if (wdev->iftype == NL80211_IFTYPE_ADHOC)
|
|
break;
|
|
|
|
/* for station, check that DA is the AP */
|
|
if (!ether_addr_equal(wdev->current_bss->pub.bssid,
|
|
mgmt->da)) {
|
|
err = -ENOTCONN;
|
|
break;
|
|
}
|
|
break;
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)))
|
|
err = -EINVAL;
|
|
break;
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
/*
|
|
* check for mesh DA must be done by driver as
|
|
* cfg80211 doesn't track the stations
|
|
*/
|
|
break;
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
/*
|
|
* fall through, P2P device only supports
|
|
* public action frames
|
|
*/
|
|
default:
|
|
err = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
wdev_unlock(wdev);
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (!ether_addr_equal(mgmt->sa, wdev_address(wdev)))
|
|
return -EINVAL;
|
|
|
|
/* Transmit the Action frame as requested by user space */
|
|
return rdev_mgmt_tx(rdev, wdev, params, cookie);
|
|
}
|
|
|
|
bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_mbm,
|
|
const u8 *buf, size_t len, u32 flags)
|
|
{
|
|
struct wiphy *wiphy = wdev->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
|
struct cfg80211_mgmt_registration *reg;
|
|
const struct ieee80211_txrx_stypes *stypes =
|
|
&wiphy->mgmt_stypes[wdev->iftype];
|
|
struct ieee80211_mgmt *mgmt = (void *)buf;
|
|
const u8 *data;
|
|
int data_len;
|
|
bool result = false;
|
|
__le16 ftype = mgmt->frame_control &
|
|
cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
|
|
u16 stype;
|
|
|
|
trace_cfg80211_rx_mgmt(wdev, freq, sig_mbm);
|
|
stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
|
|
|
|
if (!(stypes->rx & BIT(stype))) {
|
|
trace_cfg80211_return_bool(false);
|
|
return false;
|
|
}
|
|
|
|
data = buf + ieee80211_hdrlen(mgmt->frame_control);
|
|
data_len = len - ieee80211_hdrlen(mgmt->frame_control);
|
|
|
|
spin_lock_bh(&wdev->mgmt_registrations_lock);
|
|
|
|
list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
|
|
if (reg->frame_type != ftype)
|
|
continue;
|
|
|
|
if (reg->match_len > data_len)
|
|
continue;
|
|
|
|
if (memcmp(reg->match, data, reg->match_len))
|
|
continue;
|
|
|
|
/* found match! */
|
|
|
|
/* Indicate the received Action frame to user space */
|
|
if (nl80211_send_mgmt(rdev, wdev, reg->nlportid,
|
|
freq, sig_mbm,
|
|
buf, len, flags, GFP_ATOMIC))
|
|
continue;
|
|
|
|
result = true;
|
|
break;
|
|
}
|
|
|
|
spin_unlock_bh(&wdev->mgmt_registrations_lock);
|
|
|
|
trace_cfg80211_return_bool(result);
|
|
return result;
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_rx_mgmt);
|
|
|
|
void cfg80211_dfs_channels_update_work(struct work_struct *work)
|
|
{
|
|
struct delayed_work *delayed_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;
|
|
int bandid, i;
|
|
|
|
delayed_work = container_of(work, struct delayed_work, work);
|
|
rdev = container_of(delayed_work, struct cfg80211_registered_device,
|
|
dfs_update_channels_wk);
|
|
wiphy = &rdev->wiphy;
|
|
|
|
rtnl_lock();
|
|
for (bandid = 0; bandid < IEEE80211_NUM_BANDS; bandid++) {
|
|
sband = wiphy->bands[bandid];
|
|
if (!sband)
|
|
continue;
|
|
|
|
for (i = 0; i < sband->n_channels; i++) {
|
|
c = &sband->channels[i];
|
|
|
|
if (c->dfs_state != NL80211_DFS_UNAVAILABLE)
|
|
continue;
|
|
|
|
timeout = c->dfs_state_entered + msecs_to_jiffies(
|
|
IEEE80211_DFS_MIN_NOP_TIME_MS);
|
|
|
|
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,
|
|
NL80211_RADAR_NOP_FINISHED,
|
|
NULL, GFP_ATOMIC);
|
|
continue;
|
|
}
|
|
|
|
if (!check_again)
|
|
next_time = timeout - jiffies;
|
|
else
|
|
next_time = min(next_time, timeout - jiffies);
|
|
check_again = true;
|
|
}
|
|
}
|
|
rtnl_unlock();
|
|
|
|
/* reschedule if there are other channels waiting to be cleared again */
|
|
if (check_again)
|
|
queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
|
|
next_time);
|
|
}
|
|
|
|
|
|
void cfg80211_radar_event(struct wiphy *wiphy,
|
|
struct cfg80211_chan_def *chandef,
|
|
gfp_t gfp)
|
|
{
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
|
unsigned long timeout;
|
|
|
|
trace_cfg80211_radar_event(wiphy, chandef);
|
|
|
|
/* only set the chandef supplied channel to unavailable, in
|
|
* case the radar is detected on only one of multiple channels
|
|
* spanned by the chandef.
|
|
*/
|
|
cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
|
|
|
|
timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_NOP_TIME_MS);
|
|
queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
|
|
timeout);
|
|
|
|
nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_radar_event);
|
|
|
|
void cfg80211_cac_event(struct net_device *netdev,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum nl80211_radar_event event, gfp_t gfp)
|
|
{
|
|
struct wireless_dev *wdev = netdev->ieee80211_ptr;
|
|
struct wiphy *wiphy = wdev->wiphy;
|
|
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
|
|
unsigned long timeout;
|
|
|
|
trace_cfg80211_cac_event(netdev, event);
|
|
|
|
if (WARN_ON(!wdev->cac_started))
|
|
return;
|
|
|
|
if (WARN_ON(!wdev->chandef.chan))
|
|
return;
|
|
|
|
switch (event) {
|
|
case NL80211_RADAR_CAC_FINISHED:
|
|
timeout = wdev->cac_start_time +
|
|
msecs_to_jiffies(wdev->cac_time_ms);
|
|
WARN_ON(!time_after_eq(jiffies, timeout));
|
|
cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
|
|
break;
|
|
case NL80211_RADAR_CAC_ABORTED:
|
|
break;
|
|
default:
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
wdev->cac_started = false;
|
|
|
|
nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
|
|
}
|
|
EXPORT_SYMBOL(cfg80211_cac_event);
|