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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b35a51c7dd
DFS requirement for ETSI domain (section 4.7.1.4 in ETSI EN 301 893 V1.8.1) is the only one which explicitly states that once DFS channel is marked as available afer the CAC, this channel will remain in available state even moving to a different operating channel. But the same is not explicitly stated in FCC DFS requirement. Also, Pre-CAC requriements are not explicitly mentioned in FCC requirement. Current implementation in keeping DFS channel in available state is same as described in ETSI domain. For non-ETSI DFS domain, this patch gives a grace period of 2 seconds since the completion of successful CAC before moving the channel's DFS state to 'usable' from 'available' state. The same grace period is checked against the channel's dfs_state_entered timestamp while deciding if a DFS channel is available for operation. There is a new radar event, NL80211_RADAR_PRE_CAC_EXPIRED, reported when DFS channel is moved from available to usable state after the grace period. Also make sure the DFS channel state is reset to usable once the beaconing operation on that channel is brought down (like stop_ap, leave_ibss and leave_mesh) in non-ETSI domain. Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
546 lines
12 KiB
C
546 lines
12 KiB
C
/*
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* Some IBSS support code for cfg80211.
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*
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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*/
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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 <linux/export.h>
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#include <net/cfg80211.h>
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#include "wext-compat.h"
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#include "nl80211.h"
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#include "rdev-ops.h"
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void __cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
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struct ieee80211_channel *channel)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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struct cfg80211_bss *bss;
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#ifdef CONFIG_CFG80211_WEXT
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union iwreq_data wrqu;
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#endif
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return;
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if (!wdev->ssid_len)
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return;
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bss = cfg80211_get_bss(wdev->wiphy, channel, bssid, NULL, 0,
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IEEE80211_BSS_TYPE_IBSS, IEEE80211_PRIVACY_ANY);
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if (WARN_ON(!bss))
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return;
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if (wdev->current_bss) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
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}
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cfg80211_hold_bss(bss_from_pub(bss));
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wdev->current_bss = bss_from_pub(bss);
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if (!(wdev->wiphy->flags & WIPHY_FLAG_HAS_STATIC_WEP))
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cfg80211_upload_connect_keys(wdev);
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nl80211_send_ibss_bssid(wiphy_to_rdev(wdev->wiphy), dev, bssid,
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GFP_KERNEL);
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#ifdef CONFIG_CFG80211_WEXT
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memset(&wrqu, 0, sizeof(wrqu));
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memcpy(wrqu.ap_addr.sa_data, bssid, ETH_ALEN);
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wireless_send_event(dev, SIOCGIWAP, &wrqu, NULL);
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#endif
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}
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void cfg80211_ibss_joined(struct net_device *dev, const u8 *bssid,
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struct ieee80211_channel *channel, gfp_t gfp)
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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 cfg80211_event *ev;
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unsigned long flags;
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trace_cfg80211_ibss_joined(dev, bssid, channel);
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if (WARN_ON(!channel))
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return;
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ev = kzalloc(sizeof(*ev), gfp);
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if (!ev)
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return;
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ev->type = EVENT_IBSS_JOINED;
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memcpy(ev->ij.bssid, bssid, ETH_ALEN);
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ev->ij.channel = channel;
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spin_lock_irqsave(&wdev->event_lock, flags);
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list_add_tail(&ev->list, &wdev->event_list);
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spin_unlock_irqrestore(&wdev->event_lock, flags);
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queue_work(cfg80211_wq, &rdev->event_work);
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}
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EXPORT_SYMBOL(cfg80211_ibss_joined);
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static int __cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_ibss_params *params,
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struct cfg80211_cached_keys *connkeys)
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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->ssid_len)
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return -EALREADY;
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if (!params->basic_rates) {
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/*
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* If no rates were explicitly configured,
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* use the mandatory rate set for 11b or
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* 11a for maximum compatibility.
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*/
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struct ieee80211_supported_band *sband =
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rdev->wiphy.bands[params->chandef.chan->band];
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int j;
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u32 flag = params->chandef.chan->band == NL80211_BAND_5GHZ ?
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IEEE80211_RATE_MANDATORY_A :
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IEEE80211_RATE_MANDATORY_B;
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for (j = 0; j < sband->n_bitrates; j++) {
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if (sband->bitrates[j].flags & flag)
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params->basic_rates |= BIT(j);
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}
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}
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if (WARN_ON(connkeys && connkeys->def < 0))
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return -EINVAL;
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if (WARN_ON(wdev->connect_keys))
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kzfree(wdev->connect_keys);
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wdev->connect_keys = connkeys;
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wdev->ibss_fixed = params->channel_fixed;
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wdev->ibss_dfs_possible = params->userspace_handles_dfs;
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wdev->chandef = params->chandef;
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#ifdef CONFIG_CFG80211_WEXT
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wdev->wext.ibss.chandef = params->chandef;
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#endif
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err = rdev_join_ibss(rdev, dev, params);
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if (err) {
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wdev->connect_keys = NULL;
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return err;
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}
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memcpy(wdev->ssid, params->ssid, params->ssid_len);
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wdev->ssid_len = params->ssid_len;
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return 0;
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}
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int cfg80211_join_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev,
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struct cfg80211_ibss_params *params,
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struct cfg80211_cached_keys *connkeys)
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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_RTNL();
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wdev_lock(wdev);
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err = __cfg80211_join_ibss(rdev, dev, params, connkeys);
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wdev_unlock(wdev);
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return err;
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}
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static void __cfg80211_clear_ibss(struct net_device *dev, bool nowext)
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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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int i;
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ASSERT_WDEV_LOCK(wdev);
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kzfree(wdev->connect_keys);
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wdev->connect_keys = NULL;
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rdev_set_qos_map(rdev, dev, NULL);
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/*
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* Delete all the keys ... pairwise keys can't really
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* exist any more anyway, but default keys might.
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*/
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if (rdev->ops->del_key)
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for (i = 0; i < 6; i++)
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rdev_del_key(rdev, dev, i, false, NULL);
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if (wdev->current_bss) {
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cfg80211_unhold_bss(wdev->current_bss);
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cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
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}
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wdev->current_bss = NULL;
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wdev->ssid_len = 0;
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memset(&wdev->chandef, 0, sizeof(wdev->chandef));
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#ifdef CONFIG_CFG80211_WEXT
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if (!nowext)
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wdev->wext.ibss.ssid_len = 0;
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#endif
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cfg80211_sched_dfs_chan_update(rdev);
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}
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void cfg80211_clear_ibss(struct net_device *dev, bool nowext)
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{
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struct wireless_dev *wdev = dev->ieee80211_ptr;
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wdev_lock(wdev);
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__cfg80211_clear_ibss(dev, nowext);
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wdev_unlock(wdev);
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}
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int __cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext)
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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->ssid_len)
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return -ENOLINK;
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err = rdev_leave_ibss(rdev, dev);
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if (err)
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return err;
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__cfg80211_clear_ibss(dev, nowext);
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return 0;
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}
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int cfg80211_leave_ibss(struct cfg80211_registered_device *rdev,
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struct net_device *dev, bool nowext)
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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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wdev_lock(wdev);
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err = __cfg80211_leave_ibss(rdev, dev, nowext);
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wdev_unlock(wdev);
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return err;
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}
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#ifdef CONFIG_CFG80211_WEXT
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int cfg80211_ibss_wext_join(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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enum nl80211_band band;
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int i, err;
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ASSERT_WDEV_LOCK(wdev);
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if (!wdev->wext.ibss.beacon_interval)
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wdev->wext.ibss.beacon_interval = 100;
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/* try to find an IBSS channel if none requested ... */
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if (!wdev->wext.ibss.chandef.chan) {
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struct ieee80211_channel *new_chan = NULL;
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for (band = 0; band < NUM_NL80211_BANDS; band++) {
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struct ieee80211_supported_band *sband;
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struct ieee80211_channel *chan;
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sband = rdev->wiphy.bands[band];
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if (!sband)
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continue;
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for (i = 0; i < sband->n_channels; i++) {
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chan = &sband->channels[i];
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if (chan->flags & IEEE80211_CHAN_NO_IR)
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continue;
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if (chan->flags & IEEE80211_CHAN_DISABLED)
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continue;
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new_chan = chan;
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break;
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}
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if (new_chan)
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break;
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}
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if (!new_chan)
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return -EINVAL;
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cfg80211_chandef_create(&wdev->wext.ibss.chandef, new_chan,
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NL80211_CHAN_NO_HT);
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}
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/* don't join -- SSID is not there */
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if (!wdev->wext.ibss.ssid_len)
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return 0;
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if (!netif_running(wdev->netdev))
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return 0;
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if (wdev->wext.keys)
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wdev->wext.keys->def = wdev->wext.default_key;
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wdev->wext.ibss.privacy = wdev->wext.default_key != -1;
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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 < CFG80211_MAX_WEP_KEYS; i++)
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ck->params[i].key = ck->data[i];
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}
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err = __cfg80211_join_ibss(rdev, wdev->netdev,
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&wdev->wext.ibss, ck);
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if (err)
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kfree(ck);
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return err;
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}
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int cfg80211_ibss_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 ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (!rdev->ops->join_ibss)
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return -EOPNOTSUPP;
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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_NO_IR ||
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chan->flags & IEEE80211_CHAN_DISABLED)
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return -EINVAL;
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}
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if (wdev->wext.ibss.chandef.chan == chan)
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return 0;
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wdev_lock(wdev);
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err = 0;
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if (wdev->ssid_len)
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err = __cfg80211_leave_ibss(rdev, dev, true);
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wdev_unlock(wdev);
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if (err)
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return err;
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if (chan) {
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cfg80211_chandef_create(&wdev->wext.ibss.chandef, chan,
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NL80211_CHAN_NO_HT);
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wdev->wext.ibss.channel_fixed = true;
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} else {
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/* cfg80211_ibss_wext_join will pick one if needed */
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wdev->wext.ibss.channel_fixed = false;
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}
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wdev_lock(wdev);
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err = cfg80211_ibss_wext_join(rdev, wdev);
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wdev_unlock(wdev);
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return err;
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}
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int cfg80211_ibss_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 ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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wdev_lock(wdev);
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if (wdev->current_bss)
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chan = wdev->current_bss->pub.channel;
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else if (wdev->wext.ibss.chandef.chan)
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chan = wdev->wext.ibss.chandef.chan;
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wdev_unlock(wdev);
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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_ibss_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 ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (!rdev->ops->join_ibss)
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return -EOPNOTSUPP;
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wdev_lock(wdev);
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err = 0;
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if (wdev->ssid_len)
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err = __cfg80211_leave_ibss(rdev, dev, true);
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wdev_unlock(wdev);
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if (err)
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return err;
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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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memcpy(wdev->ssid, ssid, len);
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wdev->wext.ibss.ssid = wdev->ssid;
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wdev->wext.ibss.ssid_len = len;
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wdev_lock(wdev);
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err = cfg80211_ibss_wext_join(rdev, wdev);
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wdev_unlock(wdev);
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return err;
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}
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int cfg80211_ibss_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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/* call only for ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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data->flags = 0;
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wdev_lock(wdev);
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if (wdev->ssid_len) {
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data->flags = 1;
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data->length = wdev->ssid_len;
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memcpy(ssid, wdev->ssid, data->length);
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} else if (wdev->wext.ibss.ssid && wdev->wext.ibss.ssid_len) {
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data->flags = 1;
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data->length = wdev->wext.ibss.ssid_len;
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memcpy(ssid, wdev->wext.ibss.ssid, data->length);
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}
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wdev_unlock(wdev);
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return 0;
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}
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int cfg80211_ibss_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 ibss! */
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if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
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return -EINVAL;
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if (!rdev->ops->join_ibss)
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return -EOPNOTSUPP;
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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 (bssid && !is_valid_ether_addr(bssid))
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return -EINVAL;
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/* both automatic */
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if (!bssid && !wdev->wext.ibss.bssid)
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return 0;
|
|
|
|
/* fixed already - and no change */
|
|
if (wdev->wext.ibss.bssid && bssid &&
|
|
ether_addr_equal(bssid, wdev->wext.ibss.bssid))
|
|
return 0;
|
|
|
|
wdev_lock(wdev);
|
|
err = 0;
|
|
if (wdev->ssid_len)
|
|
err = __cfg80211_leave_ibss(rdev, dev, true);
|
|
wdev_unlock(wdev);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if (bssid) {
|
|
memcpy(wdev->wext.bssid, bssid, ETH_ALEN);
|
|
wdev->wext.ibss.bssid = wdev->wext.bssid;
|
|
} else
|
|
wdev->wext.ibss.bssid = NULL;
|
|
|
|
wdev_lock(wdev);
|
|
err = cfg80211_ibss_wext_join(rdev, wdev);
|
|
wdev_unlock(wdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
int cfg80211_ibss_wext_giwap(struct net_device *dev,
|
|
struct iw_request_info *info,
|
|
struct sockaddr *ap_addr, char *extra)
|
|
{
|
|
struct wireless_dev *wdev = dev->ieee80211_ptr;
|
|
|
|
/* call only for ibss! */
|
|
if (WARN_ON(wdev->iftype != NL80211_IFTYPE_ADHOC))
|
|
return -EINVAL;
|
|
|
|
ap_addr->sa_family = ARPHRD_ETHER;
|
|
|
|
wdev_lock(wdev);
|
|
if (wdev->current_bss)
|
|
memcpy(ap_addr->sa_data, wdev->current_bss->pub.bssid, ETH_ALEN);
|
|
else if (wdev->wext.ibss.bssid)
|
|
memcpy(ap_addr->sa_data, wdev->wext.ibss.bssid, ETH_ALEN);
|
|
else
|
|
eth_zero_addr(ap_addr->sa_data);
|
|
|
|
wdev_unlock(wdev);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|