/*
* 802.11 netlink interface public header
*
- * Copyright 2006, 2007, 2008 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2008 Michael Wu <flamingice@sourmilk.net>
* Copyright 2008 Luis Carlos Cobo <luisca@cozybit.com>
* Copyright 2008 Michael Buesch <mb@bu3sch.de>
* rate selection. %NL80211_ATTR_IFINDEX is used to specify the interface
* and @NL80211_ATTR_TX_RATES the set of allowed rates.
*
+ * @NL80211_CMD_REGISTER_ACTION: Register for receiving certain action frames
+ * (via @NL80211_CMD_ACTION) for processing in userspace. This command
+ * requires an interface index and a match attribute containing the first
+ * few bytes of the frame that should match, e.g. a single byte for only
+ * a category match or four bytes for vendor frames including the OUI.
+ * The registration cannot be dropped, but is removed automatically
+ * when the netlink socket is closed. Multiple registrations can be made.
+ * @NL80211_CMD_ACTION: Action frame TX request and RX notification. This
+ * command is used both as a request to transmit an Action frame and as an
+ * event indicating reception of an Action frame that was not processed in
+ * kernel code, but is for us (i.e., which may need to be processed in a
+ * user space application). %NL80211_ATTR_FRAME is used to specify the
+ * frame contents (including header). %NL80211_ATTR_WIPHY_FREQ (and
+ * optionally %NL80211_ATTR_WIPHY_CHANNEL_TYPE) is used to indicate on
+ * which channel the frame is to be transmitted or was received. This
+ * channel has to be the current channel (remain-on-channel or the
+ * operational channel). When called, this operation returns a cookie
+ * (%NL80211_ATTR_COOKIE) that will be included with the TX status event
+ * pertaining to the TX request.
+ * @NL80211_CMD_ACTION_TX_STATUS: Report TX status of an Action frame
+ * transmitted with %NL80211_CMD_ACTION. %NL80211_ATTR_COOKIE identifies
+ * the TX command and %NL80211_ATTR_FRAME includes the contents of the
+ * frame. %NL80211_ATTR_ACK flag is included if the recipient acknowledged
+ * the frame.
+ *
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
NL80211_CMD_SET_TX_BITRATE_MASK,
+ NL80211_CMD_REGISTER_ACTION,
+ NL80211_CMD_ACTION,
+ NL80211_CMD_ACTION_TX_STATUS,
+
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
* rates based on negotiated supported rates information. This attribute
* is used with %NL80211_CMD_SET_TX_BITRATE_MASK.
*
+ * @NL80211_ATTR_FRAME_MATCH: A binary attribute which typically must contain
+ * at least one byte, currently used with @NL80211_CMD_REGISTER_ACTION.
+ *
+ * @NL80211_ATTR_ACK: Flag attribute indicating that the frame was
+ * acknowledged by the recipient.
+ *
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
NL80211_ATTR_TX_RATES,
+ NL80211_ATTR_FRAME_MATCH,
+
+ NL80211_ATTR_ACK,
+
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,
/*
* 802.11 device and configuration interface
*
- * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* @cancel_remain_on_channel: Cancel an on-going remain-on-channel operation.
* This allows the operation to be terminated prior to timeout based on
* the duration value.
+ * @action: Transmit an action frame
*
* @testmode_cmd: run a test mode command
*
struct net_device *dev,
u64 cookie);
+ int (*action)(struct wiphy *wiphy, struct net_device *dev,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ const u8 *buf, size_t len, u64 *cookie);
+
/* some temporary stuff to finish wext */
int (*set_power_mgmt)(struct wiphy *wiphy, struct net_device *dev,
bool enabled, int timeout);
* set by driver (if supported) on add_interface BEFORE registering the
* netdev and may otherwise be used by driver read-only, will be update
* by cfg80211 on change_interface
+ * @action_registrations: list of registrations for action frames
+ * @action_registrations_lock: lock for the list
*/
struct wireless_dev {
struct wiphy *wiphy;
struct list_head list;
struct net_device *netdev;
+ struct list_head action_registrations;
+ spinlock_t action_registrations_lock;
+
struct mutex mtx;
struct work_struct cleanup_work;
void cfg80211_new_sta(struct net_device *dev, const u8 *mac_addr,
struct station_info *sinfo, gfp_t gfp);
+/**
+ * cfg80211_rx_action - notification of received, unprocessed Action frame
+ * @dev: network device
+ * @freq: Frequency on which the frame was received in MHz
+ * @buf: Action frame (header + body)
+ * @len: length of the frame data
+ * @gfp: context flags
+ * Returns %true if a user space application is responsible for rejecting the
+ * unrecognized Action frame; %false if no such application is registered
+ * (i.e., the driver is responsible for rejecting the unrecognized Action
+ * frame)
+ *
+ * This function is called whenever an Action frame is received for a station
+ * mode interface, but is not processed in kernel.
+ */
+bool cfg80211_rx_action(struct net_device *dev, int freq, const u8 *buf,
+ size_t len, gfp_t gfp);
+
+/**
+ * cfg80211_action_tx_status - notification of TX status for Action frame
+ * @dev: network device
+ * @cookie: Cookie returned by cfg80211_ops::action()
+ * @buf: Action frame (header + body)
+ * @len: length of the frame data
+ * @ack: Whether frame was acknowledged
+ * @gfp: context flags
+ *
+ * This function is called whenever an Action frame was requested to be
+ * transmitted with cfg80211_ops::action() to report the TX status of the
+ * transmission attempt.
+ */
+void cfg80211_action_tx_status(struct net_device *dev, u64 cookie,
+ const u8 *buf, size_t len, bool ack, gfp_t gfp);
+
#endif /* __NET_CFG80211_H */
*
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
- * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* be modified again (no seqno assignment, crypto, etc.)
* @IEEE80211_TX_INTFL_HAS_RADIOTAP: This frame was injected and still
* has a radiotap header at skb->data.
+ * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211
+ * MLME command (internal to mac80211 to figure out whether to send TX
+ * status to user space)
*/
enum mac80211_tx_control_flags {
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
IEEE80211_TX_CTL_MORE_FRAMES = BIT(18),
IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19),
IEEE80211_TX_INTFL_HAS_RADIOTAP = BIT(20),
+ IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21),
};
/**
/*
* mac80211 configuration hooks for cfg80211
*
- * Copyright 2006, 2007 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
*
* This file is GPLv2 as found in COPYING.
*/
return ieee80211_wk_cancel_remain_on_channel(sdata, cookie);
}
+static int ieee80211_action(struct wiphy *wiphy, struct net_device *dev,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ const u8 *buf, size_t len, u64 *cookie)
+{
+ return ieee80211_mgd_action(IEEE80211_DEV_TO_SUB_IF(dev), chan,
+ channel_type, buf, len, cookie);
+}
+
struct cfg80211_ops mac80211_config_ops = {
.add_virtual_intf = ieee80211_add_iface,
.del_virtual_intf = ieee80211_del_iface,
.set_bitrate_mask = ieee80211_set_bitrate_mask,
.remain_on_channel = ieee80211_remain_on_channel,
.cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,
+ .action = ieee80211_action,
};
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
- * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
struct cfg80211_disassoc_request *req,
void *cookie);
+int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ const u8 *buf, size_t len, u64 *cookie);
ieee80211_rx_result ieee80211_sta_rx_mgmt(struct ieee80211_sub_if_data *sdata,
struct sk_buff *skb);
void ieee80211_send_pspoll(struct ieee80211_local *local,
return 0;
}
+
+int ieee80211_mgd_action(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ const u8 *buf, size_t len, u64 *cookie)
+{
+ struct ieee80211_local *local = sdata->local;
+ struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+ struct sk_buff *skb;
+
+ /* Check that we are on the requested channel for transmission */
+ if ((chan != local->tmp_channel ||
+ channel_type != local->tmp_channel_type) &&
+ (chan != local->oper_channel ||
+ channel_type != local->oper_channel_type))
+ return -EBUSY;
+
+ skb = dev_alloc_skb(local->hw.extra_tx_headroom + len);
+ if (!skb)
+ return -ENOMEM;
+ skb_reserve(skb, local->hw.extra_tx_headroom);
+
+ memcpy(skb_put(skb, len), buf, len);
+
+ if (!(ifmgd->flags & IEEE80211_STA_MFP_ENABLED))
+ IEEE80211_SKB_CB(skb)->flags |=
+ IEEE80211_TX_INTFL_DONT_ENCRYPT;
+ IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_NL80211_FRAME_TX |
+ IEEE80211_TX_CTL_REQ_TX_STATUS;
+ skb->dev = sdata->dev;
+ ieee80211_tx_skb(sdata, skb);
+
+ *cookie = (unsigned long) skb;
+ return 0;
+}
struct ieee80211_sub_if_data *sdata = rx->sdata;
struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *) rx->skb->data;
struct sk_buff *nskb;
+ struct ieee80211_rx_status *status;
int len = rx->skb->len;
if (!ieee80211_is_action(mgmt->frame_control))
return RX_CONTINUE;
- if (!rx->sta)
+ /* drop too small frames */
+ if (len < IEEE80211_MIN_ACTION_SIZE)
return RX_DROP_UNUSABLE;
- if (!(rx->flags & IEEE80211_RX_RA_MATCH))
+ if (!rx->sta && mgmt->u.action.category != WLAN_CATEGORY_PUBLIC)
return RX_DROP_UNUSABLE;
- if (ieee80211_drop_unencrypted(rx, mgmt->frame_control))
+ if (!(rx->flags & IEEE80211_RX_RA_MATCH))
return RX_DROP_UNUSABLE;
- /* drop too small frames */
- if (len < IEEE80211_MIN_ACTION_SIZE)
+ if (ieee80211_drop_unencrypted(rx, mgmt->frame_control))
return RX_DROP_UNUSABLE;
- /* return action frames that have *only* category */
- if (len < IEEE80211_MIN_ACTION_SIZE + 1)
- goto return_frame;
-
switch (mgmt->u.action.category) {
case WLAN_CATEGORY_BACK:
/*
sdata->vif.type != NL80211_IFTYPE_AP)
break;
+ /* verify action_code is present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+ break;
+
switch (mgmt->u.action.u.addba_req.action_code) {
case WLAN_ACTION_ADDBA_REQ:
if (len < (IEEE80211_MIN_ACTION_SIZE +
if (sdata->vif.type != NL80211_IFTYPE_STATION)
break;
+ /* verify action_code is present */
+ if (len < IEEE80211_MIN_ACTION_SIZE + 1)
+ break;
+
switch (mgmt->u.action.u.measurement.action_code) {
case WLAN_ACTION_SPCT_MSR_REQ:
if (len < (IEEE80211_MIN_ACTION_SIZE +
}
break;
}
- return_frame:
+
/*
* For AP mode, hostapd is responsible for handling any action
* frames that we didn't handle, including returning unknown
sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
return RX_DROP_MONITOR;
+ /*
+ * Getting here means the kernel doesn't know how to handle
+ * it, but maybe userspace does ... include returned frames
+ * so userspace can register for those to know whether ones
+ * it transmitted were processed or returned.
+ */
+ status = IEEE80211_SKB_RXCB(rx->skb);
+
+ if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+ cfg80211_rx_action(rx->sdata->dev, status->freq,
+ rx->skb->data, rx->skb->len,
+ GFP_ATOMIC))
+ goto handled;
+
/* do not return rejected action frames */
if (mgmt->u.action.category & 0x80)
return RX_DROP_UNUSABLE;
}
handled:
- rx->sta->rx_packets++;
+ if (rx->sta)
+ rx->sta->rx_packets++;
dev_kfree_skb(rx->skb);
return RX_QUEUED;
}
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
- * Copyright 2008-2009 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2008-2010 Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
msecs_to_jiffies(10));
}
+ if (info->flags & IEEE80211_TX_INTFL_NL80211_FRAME_TX)
+ cfg80211_action_tx_status(
+ skb->dev, (unsigned long) skb, skb->data, skb->len,
+ !!(info->flags & IEEE80211_TX_STAT_ACK), GFP_ATOMIC);
+
/* this was a transmitted frame, but now we want to reuse it */
skb_orphan(skb);
INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
INIT_LIST_HEAD(&wdev->event_list);
spin_lock_init(&wdev->event_lock);
+ INIT_LIST_HEAD(&wdev->action_registrations);
+ spin_lock_init(&wdev->action_registrations_lock);
+
mutex_lock(&rdev->devlist_mtx);
list_add_rcu(&wdev->list, &rdev->netdev_list);
rdev->devlist_generation++;
sysfs_remove_link(&dev->dev.kobj, "phy80211");
list_del_rcu(&wdev->list);
rdev->devlist_generation++;
+ cfg80211_mlme_purge_actions(wdev);
#ifdef CONFIG_CFG80211_WEXT
kfree(wdev->wext.keys);
#endif
const u8 *resp_ie, size_t resp_ie_len,
u16 status, bool wextev,
struct cfg80211_bss *bss);
+int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
+ const u8 *match_data, int match_len);
+void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid);
+void cfg80211_mlme_purge_actions(struct wireless_dev *wdev);
+int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
+ struct net_device *dev,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ const u8 *buf, size_t len, u64 *cookie);
/* SME */
int __cfg80211_connect(struct cfg80211_registered_device *rdev,
nl80211_send_sta_event(rdev, dev, mac_addr, sinfo, gfp);
}
EXPORT_SYMBOL(cfg80211_new_sta);
+
+struct cfg80211_action_registration {
+ struct list_head list;
+
+ u32 nlpid;
+
+ int match_len;
+
+ u8 match[];
+};
+
+int cfg80211_mlme_register_action(struct wireless_dev *wdev, u32 snd_pid,
+ const u8 *match_data, int match_len)
+{
+ struct cfg80211_action_registration *reg, *nreg;
+ int err = 0;
+
+ nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
+ if (!nreg)
+ return -ENOMEM;
+
+ spin_lock_bh(&wdev->action_registrations_lock);
+
+ list_for_each_entry(reg, &wdev->action_registrations, list) {
+ int mlen = min(match_len, reg->match_len);
+
+ if (memcmp(reg->match, match_data, mlen) == 0) {
+ err = -EALREADY;
+ break;
+ }
+ }
+
+ if (err) {
+ kfree(nreg);
+ goto out;
+ }
+
+ memcpy(nreg->match, match_data, match_len);
+ nreg->match_len = match_len;
+ nreg->nlpid = snd_pid;
+ list_add(&nreg->list, &wdev->action_registrations);
+
+ out:
+ spin_unlock_bh(&wdev->action_registrations_lock);
+ return err;
+}
+
+void cfg80211_mlme_unregister_actions(struct wireless_dev *wdev, u32 nlpid)
+{
+ struct cfg80211_action_registration *reg, *tmp;
+
+ spin_lock_bh(&wdev->action_registrations_lock);
+
+ list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
+ if (reg->nlpid == nlpid) {
+ list_del(®->list);
+ kfree(reg);
+ }
+ }
+
+ spin_unlock_bh(&wdev->action_registrations_lock);
+}
+
+void cfg80211_mlme_purge_actions(struct wireless_dev *wdev)
+{
+ struct cfg80211_action_registration *reg, *tmp;
+
+ spin_lock_bh(&wdev->action_registrations_lock);
+
+ list_for_each_entry_safe(reg, tmp, &wdev->action_registrations, list) {
+ list_del(®->list);
+ kfree(reg);
+ }
+
+ spin_unlock_bh(&wdev->action_registrations_lock);
+}
+
+int cfg80211_mlme_action(struct cfg80211_registered_device *rdev,
+ struct net_device *dev,
+ struct ieee80211_channel *chan,
+ enum nl80211_channel_type channel_type,
+ const u8 *buf, size_t len, u64 *cookie)
+{
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ const struct ieee80211_mgmt *mgmt;
+
+ if (rdev->ops->action == NULL)
+ return -EOPNOTSUPP;
+ if (len < 24 + 1)
+ return -EINVAL;
+
+ mgmt = (const struct ieee80211_mgmt *) buf;
+ if (!ieee80211_is_action(mgmt->frame_control))
+ return -EINVAL;
+ if (mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
+ /* Verify that we are associated with the destination AP */
+ if (!wdev->current_bss ||
+ memcmp(wdev->current_bss->pub.bssid, mgmt->bssid,
+ ETH_ALEN) != 0 ||
+ memcmp(wdev->current_bss->pub.bssid, mgmt->da,
+ ETH_ALEN) != 0)
+ return -ENOTCONN;
+ }
+
+ if (memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0)
+ return -EINVAL;
+
+ /* Transmit the Action frame as requested by user space */
+ return rdev->ops->action(&rdev->wiphy, dev, chan, channel_type,
+ buf, len, cookie);
+}
+
+bool cfg80211_rx_action(struct net_device *dev, int freq, const u8 *buf,
+ size_t len, gfp_t gfp)
+{
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+ struct cfg80211_action_registration *reg;
+ const u8 *action_data;
+ int action_data_len;
+ bool result = false;
+
+ /* frame length - min size excluding category */
+ action_data_len = len - (IEEE80211_MIN_ACTION_SIZE - 1);
+
+ /* action data starts with category */
+ action_data = buf + IEEE80211_MIN_ACTION_SIZE - 1;
+
+ spin_lock_bh(&wdev->action_registrations_lock);
+
+ list_for_each_entry(reg, &wdev->action_registrations, list) {
+ if (reg->match_len > action_data_len)
+ continue;
+
+ if (memcmp(reg->match, action_data, reg->match_len))
+ continue;
+
+ /* found match! */
+
+ /* Indicate the received Action frame to user space */
+ if (nl80211_send_action(rdev, dev, reg->nlpid, freq,
+ buf, len, gfp))
+ continue;
+
+ result = true;
+ break;
+ }
+
+ spin_unlock_bh(&wdev->action_registrations_lock);
+
+ return result;
+}
+EXPORT_SYMBOL(cfg80211_rx_action);
+
+void cfg80211_action_tx_status(struct net_device *dev, u64 cookie,
+ const u8 *buf, size_t len, bool ack, gfp_t gfp)
+{
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+ /* Indicate TX status of the Action frame to user space */
+ nl80211_send_action_tx_status(rdev, dev, cookie, buf, len, ack, gfp);
+}
+EXPORT_SYMBOL(cfg80211_action_tx_status);
/*
* This is the new netlink-based wireless configuration interface.
*
- * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
*/
#include <linux/if.h>
[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
[NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED },
+ [NL80211_ATTR_FRAME] = { .type = NLA_BINARY,
+ .len = IEEE80211_MAX_DATA_LEN },
+ [NL80211_ATTR_FRAME_MATCH] = { .type = NLA_BINARY, },
};
/* policy for the attributes */
CMD(flush_pmksa, FLUSH_PMKSA);
CMD(remain_on_channel, REMAIN_ON_CHANNEL);
CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
+ CMD(action, ACTION);
if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
i++;
NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
return err;
}
+static int nl80211_register_action(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *dev;
+ int err;
+
+ if (!info->attrs[NL80211_ATTR_FRAME_MATCH])
+ return -EINVAL;
+
+ if (nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]) < 1)
+ return -EINVAL;
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto unlock_rtnl;
+
+ if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ /* not much point in registering if we can't reply */
+ if (!rdev->ops->action) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ err = cfg80211_mlme_register_action(dev->ieee80211_ptr, info->snd_pid,
+ nla_data(info->attrs[NL80211_ATTR_FRAME_MATCH]),
+ nla_len(info->attrs[NL80211_ATTR_FRAME_MATCH]));
+ out:
+ cfg80211_unlock_rdev(rdev);
+ dev_put(dev);
+ unlock_rtnl:
+ rtnl_unlock();
+ return err;
+}
+
+static int nl80211_action(struct sk_buff *skb, struct genl_info *info)
+{
+ struct cfg80211_registered_device *rdev;
+ struct net_device *dev;
+ struct ieee80211_channel *chan;
+ enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
+ u32 freq;
+ int err;
+ void *hdr;
+ u64 cookie;
+ struct sk_buff *msg;
+
+ if (!info->attrs[NL80211_ATTR_FRAME] ||
+ !info->attrs[NL80211_ATTR_WIPHY_FREQ])
+ return -EINVAL;
+
+ rtnl_lock();
+
+ err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+ if (err)
+ goto unlock_rtnl;
+
+ if (!rdev->ops->action) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_STATION) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!netif_running(dev)) {
+ err = -ENETDOWN;
+ goto out;
+ }
+
+ if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
+ channel_type = nla_get_u32(
+ info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
+ if (channel_type != NL80211_CHAN_NO_HT &&
+ channel_type != NL80211_CHAN_HT20 &&
+ channel_type != NL80211_CHAN_HT40PLUS &&
+ channel_type != NL80211_CHAN_HT40MINUS)
+ err = -EINVAL;
+ goto out;
+ }
+
+ freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
+ chan = rdev_freq_to_chan(rdev, freq, channel_type);
+ if (chan == NULL) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
+ NL80211_CMD_ACTION);
+
+ if (IS_ERR(hdr)) {
+ err = PTR_ERR(hdr);
+ goto free_msg;
+ }
+ err = cfg80211_mlme_action(rdev, dev, chan, channel_type,
+ nla_data(info->attrs[NL80211_ATTR_FRAME]),
+ nla_len(info->attrs[NL80211_ATTR_FRAME]),
+ &cookie);
+ if (err)
+ goto free_msg;
+
+ NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
+
+ genlmsg_end(msg, hdr);
+ err = genlmsg_reply(msg, info);
+ goto out;
+
+ nla_put_failure:
+ err = -ENOBUFS;
+ free_msg:
+ nlmsg_free(msg);
+ out:
+ cfg80211_unlock_rdev(rdev);
+ dev_put(dev);
+unlock_rtnl:
+ rtnl_unlock();
+ return err;
+}
+
static struct genl_ops nl80211_ops[] = {
{
.cmd = NL80211_CMD_GET_WIPHY,
.policy = nl80211_policy,
.flags = GENL_ADMIN_PERM,
},
+ {
+ .cmd = NL80211_CMD_REGISTER_ACTION,
+ .doit = nl80211_register_action,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
+ {
+ .cmd = NL80211_CMD_ACTION,
+ .doit = nl80211_action,
+ .policy = nl80211_policy,
+ .flags = GENL_ADMIN_PERM,
+ },
};
static struct genl_multicast_group nl80211_mlme_mcgrp = {
nl80211_mlme_mcgrp.id, gfp);
}
+int nl80211_send_action(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u32 nlpid,
+ int freq, const u8 *buf, size_t len, gfp_t gfp)
+{
+ struct sk_buff *msg;
+ void *hdr;
+ int err;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
+ if (!msg)
+ return -ENOMEM;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return -ENOMEM;
+ }
+
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
+ NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
+
+ err = genlmsg_end(msg, hdr);
+ if (err < 0) {
+ nlmsg_free(msg);
+ return err;
+ }
+
+ err = genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, nlpid);
+ if (err < 0)
+ return err;
+ return 0;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+ return -ENOBUFS;
+}
+
+void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u64 cookie,
+ const u8 *buf, size_t len, bool ack,
+ gfp_t gfp)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_ACTION_TX_STATUS);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
+ NLA_PUT(msg, NL80211_ATTR_FRAME, len, buf);
+ NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
+ if (ack)
+ NLA_PUT_FLAG(msg, NL80211_ATTR_ACK);
+
+ if (genlmsg_end(msg, hdr) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast(msg, 0, nl80211_mlme_mcgrp.id, gfp);
+ return;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+}
+
+static int nl80211_netlink_notify(struct notifier_block * nb,
+ unsigned long state,
+ void *_notify)
+{
+ struct netlink_notify *notify = _notify;
+ struct cfg80211_registered_device *rdev;
+ struct wireless_dev *wdev;
+
+ if (state != NETLINK_URELEASE)
+ return NOTIFY_DONE;
+
+ rcu_read_lock();
+
+ list_for_each_entry_rcu(rdev, &cfg80211_rdev_list, list)
+ list_for_each_entry_rcu(wdev, &rdev->netdev_list, list)
+ cfg80211_mlme_unregister_actions(wdev, notify->pid);
+
+ rcu_read_unlock();
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block nl80211_netlink_notifier = {
+ .notifier_call = nl80211_netlink_notify,
+};
+
/* initialisation/exit functions */
int nl80211_init(void)
goto err_out;
#endif
+ err = netlink_register_notifier(&nl80211_netlink_notifier);
+ if (err)
+ goto err_out;
+
return 0;
err_out:
genl_unregister_family(&nl80211_fam);
void nl80211_exit(void)
{
+ netlink_unregister_notifier(&nl80211_netlink_notifier);
genl_unregister_family(&nl80211_fam);
}
struct net_device *dev, const u8 *mac_addr,
struct station_info *sinfo, gfp_t gfp);
+int nl80211_send_action(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u32 nlpid, int freq,
+ const u8 *buf, size_t len, gfp_t gfp);
+void nl80211_send_action_tx_status(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, u64 cookie,
+ const u8 *buf, size_t len, bool ack,
+ gfp_t gfp);
+
#endif /* __NET_WIRELESS_NL80211_H */
projects / linux.git / commitdiff