forked from mirrors/linux
f42d22d3f7
Define a guard for the wiphy mutex, and use it in most code in cfg80211, though not all due to some interaction with RTNL and/or indentation. Suggested-by: Jeff Johnson <quic_jjohnson@quicinc.com> Reviewed-by: Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Link: https://patch.msgid.link/20241122094225.88765cbaab65.I610c9b14f36902e75e1d13f0db29f8bef2298804@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
369 lines
8.6 KiB
C
369 lines
8.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* cfg80211 wext compat for managed mode.
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*
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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* Copyright (C) 2009, 2020-2023 Intel Corporation
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*/
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#include <linux/export.h>
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#include <linux/etherdevice.h>
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#include <linux/if_arp.h>
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#include <linux/slab.h>
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#include <net/cfg80211.h>
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#include <net/cfg80211-wext.h>
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#include "wext-compat.h"
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#include "nl80211.h"
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int cfg80211_mgd_wext_connect(struct cfg80211_registered_device *rdev,
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struct wireless_dev *wdev)
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{
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struct cfg80211_cached_keys *ck = NULL;
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const u8 *prev_bssid = NULL;
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int err, i;
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ASSERT_RTNL();
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lockdep_assert_wiphy(wdev->wiphy);
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if (!netif_running(wdev->netdev))
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return 0;
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wdev->wext.connect.ie = wdev->wext.ie;
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wdev->wext.connect.ie_len = wdev->wext.ie_len;
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/* Use default background scan period */
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wdev->wext.connect.bg_scan_period = -1;
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if (wdev->wext.keys) {
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wdev->wext.keys->def = wdev->wext.default_key;
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if (wdev->wext.default_key != -1)
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wdev->wext.connect.privacy = true;
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}
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if (!wdev->wext.connect.ssid_len)
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return 0;
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if (wdev->wext.keys && wdev->wext.keys->def != -1) {
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ck = kmemdup(wdev->wext.keys, sizeof(*ck), GFP_KERNEL);
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if (!ck)
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return -ENOMEM;
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for (i = 0; i < 4; i++)
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ck->params[i].key = ck->data[i];
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}
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if (wdev->wext.prev_bssid_valid)
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prev_bssid = wdev->wext.prev_bssid;
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err = cfg80211_connect(rdev, wdev->netdev,
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&wdev->wext.connect, ck, prev_bssid);
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if (err)
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kfree_sensitive(ck);
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return err;
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}
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int cfg80211_mgd_wext_siwfreq(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_freq *wextfreq, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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struct ieee80211_channel *chan = NULL;
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int err, freq;
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/* call only for station! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return -EINVAL;
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freq = cfg80211_wext_freq(wextfreq);
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if (freq < 0)
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return freq;
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if (freq) {
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chan = ieee80211_get_channel(wdev->wiphy, freq);
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if (!chan)
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return -EINVAL;
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if (chan->flags & IEEE80211_CHAN_DISABLED)
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return -EINVAL;
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}
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if (wdev->conn) {
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bool event = true;
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if (wdev->wext.connect.channel == chan)
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return 0;
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/* if SSID set, we'll try right again, avoid event */
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if (wdev->wext.connect.ssid_len)
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event = false;
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err = cfg80211_disconnect(rdev, dev,
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WLAN_REASON_DEAUTH_LEAVING, event);
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if (err)
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return err;
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}
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wdev->wext.connect.channel = chan;
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return cfg80211_mgd_wext_connect(rdev, wdev);
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}
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int cfg80211_mgd_wext_giwfreq(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_freq *freq, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct ieee80211_channel *chan = NULL;
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/* call only for station! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return -EINVAL;
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if (wdev->valid_links)
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return -EOPNOTSUPP;
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if (wdev->links[0].client.current_bss)
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chan = wdev->links[0].client.current_bss->pub.channel;
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else if (wdev->wext.connect.channel)
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chan = wdev->wext.connect.channel;
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if (chan) {
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freq->m = chan->center_freq;
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freq->e = 6;
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return 0;
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}
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/* no channel if not joining */
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return -EINVAL;
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}
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int cfg80211_mgd_wext_siwessid(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_point *data, char *ssid)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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size_t len = data->length;
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int err;
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/* call only for station! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return -EINVAL;
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if (!data->flags)
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len = 0;
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/* iwconfig uses nul termination in SSID.. */
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if (len > 0 && ssid[len - 1] == '\0')
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len--;
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if (wdev->conn) {
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bool event = true;
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if (wdev->wext.connect.ssid && len &&
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len == wdev->wext.connect.ssid_len &&
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memcmp(wdev->wext.connect.ssid, ssid, len) == 0)
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return 0;
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/* if SSID set now, we'll try to connect, avoid event */
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if (len)
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event = false;
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err = cfg80211_disconnect(rdev, dev,
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WLAN_REASON_DEAUTH_LEAVING, event);
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if (err)
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return err;
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}
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wdev->wext.prev_bssid_valid = false;
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wdev->wext.connect.ssid = wdev->wext.ssid;
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memcpy(wdev->wext.ssid, ssid, len);
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wdev->wext.connect.ssid_len = len;
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wdev->wext.connect.crypto.control_port = false;
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wdev->wext.connect.crypto.control_port_ethertype =
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cpu_to_be16(ETH_P_PAE);
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return cfg80211_mgd_wext_connect(rdev, wdev);
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}
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int cfg80211_mgd_wext_giwessid(struct net_device *dev,
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struct iw_request_info *info,
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struct iw_point *data, char *ssid)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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int ret = 0;
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/* call only for station! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return -EINVAL;
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if (wdev->valid_links)
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return -EINVAL;
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data->flags = 0;
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if (wdev->links[0].client.current_bss) {
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const struct element *ssid_elem;
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rcu_read_lock();
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ssid_elem = ieee80211_bss_get_elem(
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&wdev->links[0].client.current_bss->pub,
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WLAN_EID_SSID);
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if (ssid_elem) {
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data->flags = 1;
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data->length = ssid_elem->datalen;
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if (data->length > IW_ESSID_MAX_SIZE)
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ret = -EINVAL;
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else
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memcpy(ssid, ssid_elem->data, data->length);
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}
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rcu_read_unlock();
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} else if (wdev->wext.connect.ssid && wdev->wext.connect.ssid_len) {
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data->flags = 1;
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data->length = wdev->wext.connect.ssid_len;
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memcpy(ssid, wdev->wext.connect.ssid, data->length);
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}
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return ret;
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}
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int cfg80211_mgd_wext_siwap(struct net_device *dev,
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struct iw_request_info *info,
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struct sockaddr *ap_addr, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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u8 *bssid = ap_addr->sa_data;
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int err;
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/* call only for station! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return -EINVAL;
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if (ap_addr->sa_family != ARPHRD_ETHER)
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return -EINVAL;
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/* automatic mode */
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if (is_zero_ether_addr(bssid) || is_broadcast_ether_addr(bssid))
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bssid = NULL;
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if (wdev->conn) {
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/* both automatic */
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if (!bssid && !wdev->wext.connect.bssid)
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return 0;
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/* fixed already - and no change */
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if (wdev->wext.connect.bssid && bssid &&
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ether_addr_equal(bssid, wdev->wext.connect.bssid))
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return 0;
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err = cfg80211_disconnect(rdev, dev,
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WLAN_REASON_DEAUTH_LEAVING, false);
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if (err)
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return err;
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}
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if (bssid) {
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memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
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wdev->wext.connect.bssid = wdev->wext.bssid;
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} else
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wdev->wext.connect.bssid = NULL;
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return cfg80211_mgd_wext_connect(rdev, wdev);
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}
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int cfg80211_mgd_wext_giwap(struct net_device *dev,
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struct iw_request_info *info,
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struct sockaddr *ap_addr, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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/* call only for station! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION))
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return -EINVAL;
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ap_addr->sa_family = ARPHRD_ETHER;
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if (wdev->valid_links)
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return -EOPNOTSUPP;
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if (wdev->links[0].client.current_bss)
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memcpy(ap_addr->sa_data,
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wdev->links[0].client.current_bss->pub.bssid,
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ETH_ALEN);
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else
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eth_zero_addr(ap_addr->sa_data);
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return 0;
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}
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int cfg80211_wext_siwgenie(struct net_device *dev,
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struct iw_request_info *info,
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union iwreq_data *wrqu, char *extra)
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{
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struct iw_point *data = &wrqu->data;
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
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int ie_len = data->length;
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u8 *ie = extra;
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if (wdev->iftype != NL80211_IFTYPE_STATION)
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return -EOPNOTSUPP;
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if (!ie_len)
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ie = NULL;
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guard(wiphy)(wdev->wiphy);
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/* no change */
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if (wdev->wext.ie_len == ie_len &&
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memcmp(wdev->wext.ie, ie, ie_len) == 0)
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return 0;
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if (ie_len) {
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ie = kmemdup(extra, ie_len, GFP_KERNEL);
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if (!ie)
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return -ENOMEM;
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} else {
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ie = NULL;
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}
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kfree(wdev->wext.ie);
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wdev->wext.ie = ie;
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wdev->wext.ie_len = ie_len;
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if (wdev->conn)
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return cfg80211_disconnect(rdev, dev,
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WLAN_REASON_DEAUTH_LEAVING, false);
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/* userspace better not think we'll reconnect */
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return 0;
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}
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int cfg80211_wext_siwmlme(struct net_device *dev,
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struct iw_request_info *info,
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union iwreq_data *wrqu, char *extra)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct iw_mlme *mlme = (struct iw_mlme *)extra;
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struct cfg80211_registered_device *rdev;
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if (!wdev)
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return -EOPNOTSUPP;
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rdev = wiphy_to_rdev(wdev->wiphy);
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if (wdev->iftype != NL80211_IFTYPE_STATION)
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return -EINVAL;
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if (mlme->addr.sa_family != ARPHRD_ETHER)
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return -EINVAL;
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guard(wiphy)(&rdev->wiphy);
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switch (mlme->cmd) {
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case IW_MLME_DEAUTH:
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case IW_MLME_DISASSOC:
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return cfg80211_disconnect(rdev, dev, mlme->reason_code, true);
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default:
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return -EOPNOTSUPP;
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}
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}
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