Add driver API functionality for off-channel Action frames
This adds new commands and events for allowing off-channel Action frame exchanges to be requested. This functionality is not yet used and is only fully supported by driver_test.c at this point. driver_nl80211.c has support for the remain-on-channel commands, but the Action frame TX/RX part is still pending review for the kernel code and as such, is not yet included here.
This commit is contained in:
Jouni Malinen
Jouni Malinen
parent
d7c53e432b
commit
55777702cd
5 changed files with 430 additions and 0 deletions
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@ -1519,6 +1519,27 @@ struct wpa_driver_ops {
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*/
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int (*set_wds_sta)(void *priv, const u8 *addr, int aid, int val);
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/**
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* send_action - Transmit an Action frame
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* @priv: Private driver interface data
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* @freq: Frequency (in MHz) of the channel
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* @dst: Destination MAC address
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* @src: Source MAC address
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* @data: Frame body
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* @data_len: data length in octets
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* Returns: 0 on success, -1 on failure
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*
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* This command can be used to request the driver to transmit an action
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* frame to the specified destination. If a remain-on-channel duration
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* is in progress, the frame is transmitted on that channel. Otherwise,
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* the frame is transmitted on the current operational channel if in
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* associated state in station mode or if operating as an AP. If none
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* of these conditions is in effect, send_action() cannot be used.
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*/
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int (*send_action)(void *priv, unsigned int freq,
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const u8 *dst, const u8 *src,
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const u8 *data, size_t data_len);
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/**
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* alloc_interface_addr - Allocate a virtual interface address
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* @priv: Private driver interface data
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@ -1549,6 +1570,44 @@ struct wpa_driver_ops {
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*/
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void (*release_interface_addr)(void *priv, const u8 *addr);
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/**
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* remain_on_channel - Remain awake on a channel
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* @priv: Private driver interface data
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* @freq: Frequency (in MHz) of the channel
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* @duration: Duration in milliseconds
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* Returns: 0 on success, -1 on failure
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*
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* This command is used to request the driver to remain awake on the
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* specified channel for the specified duration and report received
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* Action frames with EVENT_RX_ACTION events. Optionally, received
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* Probe Request frames may also be requested to be reported by calling
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* probe_req_report(). These will be reported with EVENT_RX_PROBE_REQ.
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*
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* The driver may not be at the requested channel when this function
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* returns, i.e., the return code is only indicating whether the
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* request was accepted. The caller will need to wait until the
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* EVENT_REMAIN_ON_CHANNEL event indicates that the driver has
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* completed the channel change. This may take some time due to other
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* need for the radio and the caller should be prepared to timing out
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* its wait since there are no guarantees on when this request can be
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* executed.
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*/
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int (*remain_on_channel)(void *priv, unsigned int freq,
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unsigned int duration);
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/**
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* cancel_remain_on_channel - Cancel remain-on-channel operation
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* @priv: Private driver interface data
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*
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* This command can be used to cancel a remain-on-channel operation
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* before its originally requested duration has passed. This could be
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* used, e.g., when remain_on_channel() is used to request extra time
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* to receive a response to an Action frame and the response is
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* received when there is still unneeded time remaining on the
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* remain-on-channel operation.
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*/
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int (*cancel_remain_on_channel)(void *priv);
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/**
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* probe_req_report - Request Probe Request frames to be indicated
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* @priv: Private driver interface data
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@ -1766,6 +1825,34 @@ enum wpa_event_type {
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*/
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EVENT_RX_MGMT,
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/**
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* EVENT_RX_ACTION - Action frame received
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*
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* This event is used to indicate when an Action frame has been
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* received. Information about the received frame is included in
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* union wpa_event_data::rx_action.
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*/
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EVENT_RX_ACTION,
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/**
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* EVENT_REMAIN_ON_CHANNEL - Remain-on-channel duration started
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*
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* This event is used to indicate when the driver has started the
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* requested remain-on-channel duration. Information about the
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* operation is included in union wpa_event_data::remain_on_channel.
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*/
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EVENT_REMAIN_ON_CHANNEL,
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/**
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* EVENT_CANCEL_REMAIN_ON_CHANNEL - Remain-on-channel timed out
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*
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* This event is used to indicate when the driver has completed
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* remain-on-channel duration, i.e., may noot be available on the
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* requested channel anymore. Information about the
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* operation is included in union wpa_event_data::remain_on_channel.
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*/
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EVENT_CANCEL_REMAIN_ON_CHANNEL,
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/**
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* EVENT_MLME_RX - Report reception of frame for MLME (test use only)
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*
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@ -2011,6 +2098,53 @@ union wpa_event_data {
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u32 ssi_signal;
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} rx_mgmt;
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/**
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* struct rx_action - Data for EVENT_RX_ACTION events
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*/
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struct rx_action {
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/**
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* sa - Source address of the received Action frame
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*/
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const u8 *sa;
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/**
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* category - Action frame category
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*/
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u8 category;
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/**
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* data - Action frame body after category field
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*/
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const u8 *data;
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/**
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* len - Length of data in octets
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*/
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size_t len;
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/**
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* freq - Frequency (in MHz) on which the frame was received
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*/
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int freq;
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} rx_action;
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/**
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* struct remain_on_channel - Data for EVENT_REMAIN_ON_CHANNEL events
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*
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* This is also used with EVENT_CANCEL_REMAIN_ON_CHANNEL events.
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*/
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struct remain_on_channel {
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/**
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* freq - Channel frequency in MHz
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*/
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unsigned int freq;
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/**
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* duration - Duration to remain on the channel in milliseconds
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*/
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unsigned int duration;
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} remain_on_channel;
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/**
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* struct scan_info - Optional data for EVENT_SCAN_RESULTS events
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* @aborted: Whether the scan was aborted
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@ -3246,7 +3246,10 @@ const struct wpa_driver_ops wpa_driver_ndis_ops = {
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NULL /* set_ap_wps_ie */,
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NULL /* set_supp_port */,
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NULL /* set_wds_sta */,
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NULL /* send_action */,
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NULL /* alloc_interface_addr */,
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NULL /* release_interface_addr */,
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NULL /* remain_on_channel */,
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NULL /* cancel_remain_on_channel */,
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NULL /* probe_req_report */
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};
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@ -98,6 +98,9 @@ struct wpa_driver_nl80211_data {
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int probe_req_report;
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unsigned int beacon_set:1;
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unsigned int pending_remain_on_chan:1;
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u64 remain_on_chan_cookie;
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#ifdef HOSTAPD
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int eapol_sock; /* socket for EAPOL frames */
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@ -709,6 +712,53 @@ static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
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}
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static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
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int cancel_event, struct nlattr *tb[])
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{
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unsigned int freq, chan_type, duration;
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union wpa_event_data data;
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u64 cookie;
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if (tb[NL80211_ATTR_WIPHY_FREQ])
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freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
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else
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freq = 0;
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if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
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chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
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else
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chan_type = 0;
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if (tb[NL80211_ATTR_DURATION])
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duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
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else
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duration = 0;
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if (tb[NL80211_ATTR_COOKIE])
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cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
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else
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cookie = 0;
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wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
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"freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
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cancel_event, freq, chan_type, duration,
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(long long unsigned int) cookie,
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cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
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if (cookie != drv->remain_on_chan_cookie)
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return; /* not for us */
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drv->pending_remain_on_chan = !cancel_event;
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os_memset(&data, 0, sizeof(data));
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data.remain_on_channel.freq = freq;
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data.remain_on_channel.duration = duration;
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wpa_supplicant_event(drv->ctx, cancel_event ?
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EVENT_CANCEL_REMAIN_ON_CHANNEL :
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EVENT_REMAIN_ON_CHANNEL, &data);
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}
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static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
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struct nlattr *tb[])
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{
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@ -831,6 +881,12 @@ static int process_event(struct nl_msg *msg, void *arg)
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case NL80211_CMD_JOIN_IBSS:
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mlme_event_join_ibss(drv, tb);
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break;
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case NL80211_CMD_REMAIN_ON_CHANNEL:
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mlme_event_remain_on_channel(drv, 0, tb);
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break;
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case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
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mlme_event_remain_on_channel(drv, 1, tb);
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break;
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default:
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wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
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"(cmd=%d)", gnlh->cmd);
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@ -4415,6 +4471,90 @@ static int wpa_driver_nl80211_if_remove(void *priv,
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}
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static int cookie_handler(struct nl_msg *msg, void *arg)
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{
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struct nlattr *tb[NL80211_ATTR_MAX + 1];
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struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
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u64 *cookie = arg;
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nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
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genlmsg_attrlen(gnlh, 0), NULL);
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if (tb[NL80211_ATTR_COOKIE])
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*cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
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return NL_SKIP;
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}
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static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
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unsigned int duration)
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{
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struct wpa_driver_nl80211_data *drv = priv;
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struct nl_msg *msg;
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int ret;
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u64 cookie;
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msg = nlmsg_alloc();
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if (!msg)
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return -1;
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genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
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NL80211_CMD_REMAIN_ON_CHANNEL, 0);
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
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NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
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NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
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cookie = 0;
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ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
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if (ret == 0) {
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wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
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"0x%llx for freq=%u MHz duration=%u",
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(long long unsigned int) cookie, freq, duration);
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drv->remain_on_chan_cookie = cookie;
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return 0;
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}
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wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
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"(freq=%d): %d (%s)", freq, ret, strerror(-ret));
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nla_put_failure:
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return -1;
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}
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static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
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{
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struct wpa_driver_nl80211_data *drv = priv;
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struct nl_msg *msg;
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int ret;
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if (!drv->pending_remain_on_chan) {
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wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
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"to cancel");
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return -1;
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}
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wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
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"0x%llx",
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(long long unsigned int) drv->remain_on_chan_cookie);
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msg = nlmsg_alloc();
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if (!msg)
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return -1;
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genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
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NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
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NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
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NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
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ret = send_and_recv_msgs(drv, msg, NULL, NULL);
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if (ret == 0)
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return 0;
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wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
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"%d (%s)", ret, strerror(-ret));
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nla_put_failure:
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return -1;
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}
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static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
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void *timeout_ctx)
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{
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@ -4543,6 +4683,9 @@ const struct wpa_driver_ops wpa_driver_nl80211_ops = {
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.set_sta_vlan = i802_set_sta_vlan,
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.set_wds_sta = i802_set_wds_sta,
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#endif /* HOSTAPD */
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.remain_on_channel = wpa_driver_nl80211_remain_on_channel,
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.cancel_remain_on_channel =
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wpa_driver_nl80211_cancel_remain_on_channel,
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.probe_req_report = wpa_driver_nl80211_probe_req_report,
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.alloc_interface_addr = wpa_driver_nl80211_alloc_interface_addr,
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.release_interface_addr = wpa_driver_nl80211_release_interface_addr,
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@ -104,6 +104,10 @@ struct wpa_driver_test_data {
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int alloc_iface_idx;
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int probe_req_report;
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unsigned int remain_on_channel_freq;
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unsigned int remain_on_channel_duration;
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int current_freq;
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};
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@ -112,6 +116,7 @@ static int wpa_driver_test_attach(struct wpa_driver_test_data *drv,
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const char *dir, int ap);
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static void wpa_driver_test_close_test_socket(
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struct wpa_driver_test_data *drv);
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static void test_remain_on_channel_timeout(void *eloop_ctx, void *timeout_ctx);
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static void test_driver_free_bss(struct test_driver_bss *bss)
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@ -1986,6 +1991,7 @@ static void wpa_driver_test_deinit(void *priv)
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wpa_driver_test_close_test_socket(drv);
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eloop_cancel_timeout(wpa_driver_test_scan_timeout, drv, drv->ctx);
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eloop_cancel_timeout(wpa_driver_test_poll, drv, NULL);
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eloop_cancel_timeout(test_remain_on_channel_timeout, drv, NULL);
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os_free(drv->test_dir);
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for (i = 0; i < MAX_SCAN_RESULTS; i++)
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os_free(drv->scanres[i]);
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@ -2300,8 +2306,10 @@ static int wpa_driver_test_set_channel(void *priv,
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enum hostapd_hw_mode phymode,
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int chan, int freq)
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{
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struct wpa_driver_test_data *drv = priv;
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wpa_printf(MSG_DEBUG, "%s: phymode=%d chan=%d freq=%d",
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__func__, phymode, chan, freq);
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drv->current_freq = freq;
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return 0;
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}
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@ -2464,6 +2472,56 @@ fail:
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}
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static int wpa_driver_test_set_freq(void *priv,
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struct hostapd_freq_params *freq)
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{
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struct wpa_driver_test_data *drv = priv;
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wpa_printf(MSG_DEBUG, "test: set_freq %u MHz", freq->freq);
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drv->current_freq = freq->freq;
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return 0;
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}
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static int wpa_driver_test_send_action(void *priv, unsigned int freq,
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const u8 *dst, const u8 *src,
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const u8 *data, size_t data_len)
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{
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struct wpa_driver_test_data *drv = priv;
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int ret = -1;
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u8 *buf;
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struct ieee80211_hdr *hdr;
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wpa_printf(MSG_DEBUG, "test: Send Action frame");
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if ((drv->remain_on_channel_freq &&
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freq != drv->remain_on_channel_freq) ||
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(drv->remain_on_channel_freq == 0 &&
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freq != (unsigned int) drv->current_freq)) {
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wpa_printf(MSG_DEBUG, "test: Reject Action frame TX on "
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"unexpected channel: freq=%u MHz (current_freq=%u "
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"MHz, remain-on-channel freq=%u MHz)",
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freq, drv->current_freq,
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drv->remain_on_channel_freq);
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return -1;
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}
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buf = os_zalloc(24 + data_len);
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if (buf == NULL)
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return ret;
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os_memcpy(buf + 24, data, data_len);
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hdr = (struct ieee80211_hdr *) buf;
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hdr->frame_control =
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IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
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os_memcpy(hdr->addr1, dst, ETH_ALEN);
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os_memcpy(hdr->addr2, src, ETH_ALEN);
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os_memcpy(hdr->addr3, "\xff\xff\xff\xff\xff\xff", ETH_ALEN);
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ret = wpa_driver_test_send_mlme(priv, buf, 24 + data_len);
|
||||
os_free(buf);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static int wpa_driver_test_alloc_interface_addr(void *priv, u8 *addr)
|
||||
{
|
||||
struct wpa_driver_test_data *drv = priv;
|
||||
|
|
@ -2482,6 +2540,64 @@ static void wpa_driver_test_release_interface_addr(void *priv, const u8 *addr)
|
|||
}
|
||||
|
||||
|
||||
static void test_remain_on_channel_timeout(void *eloop_ctx, void *timeout_ctx)
|
||||
{
|
||||
struct wpa_driver_test_data *drv = eloop_ctx;
|
||||
union wpa_event_data data;
|
||||
|
||||
wpa_printf(MSG_DEBUG, "test: Remain-on-channel timeout");
|
||||
|
||||
os_memset(&data, 0, sizeof(data));
|
||||
data.remain_on_channel.freq = drv->remain_on_channel_freq;
|
||||
data.remain_on_channel.duration = drv->remain_on_channel_duration;
|
||||
wpa_supplicant_event(drv->ctx, EVENT_CANCEL_REMAIN_ON_CHANNEL, &data);
|
||||
|
||||
drv->remain_on_channel_freq = 0;
|
||||
}
|
||||
|
||||
|
||||
static int wpa_driver_test_remain_on_channel(void *priv, unsigned int freq,
|
||||
unsigned int duration)
|
||||
{
|
||||
struct wpa_driver_test_data *drv = priv;
|
||||
union wpa_event_data data;
|
||||
|
||||
wpa_printf(MSG_DEBUG, "%s(freq=%u, duration=%u)",
|
||||
__func__, freq, duration);
|
||||
if (drv->remain_on_channel_freq &&
|
||||
drv->remain_on_channel_freq != freq) {
|
||||
wpa_printf(MSG_DEBUG, "test: Refuse concurrent "
|
||||
"remain_on_channel request");
|
||||
return -1;
|
||||
}
|
||||
|
||||
drv->remain_on_channel_freq = freq;
|
||||
drv->remain_on_channel_duration = duration;
|
||||
eloop_cancel_timeout(test_remain_on_channel_timeout, drv, NULL);
|
||||
eloop_register_timeout(duration / 1000, (duration % 1000) * 1000,
|
||||
test_remain_on_channel_timeout, drv, NULL);
|
||||
|
||||
os_memset(&data, 0, sizeof(data));
|
||||
data.remain_on_channel.freq = freq;
|
||||
data.remain_on_channel.duration = duration;
|
||||
wpa_supplicant_event(drv->ctx, EVENT_REMAIN_ON_CHANNEL, &data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int wpa_driver_test_cancel_remain_on_channel(void *priv)
|
||||
{
|
||||
struct wpa_driver_test_data *drv = priv;
|
||||
wpa_printf(MSG_DEBUG, "%s", __func__);
|
||||
if (!drv->remain_on_channel_freq)
|
||||
return -1;
|
||||
drv->remain_on_channel_freq = 0;
|
||||
eloop_cancel_timeout(test_remain_on_channel_timeout, drv, NULL);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int wpa_driver_test_probe_req_report(void *priv, int report)
|
||||
{
|
||||
struct wpa_driver_test_data *drv = priv;
|
||||
|
|
@ -2534,7 +2650,11 @@ const struct wpa_driver_ops wpa_driver_test_ops = {
|
|||
.init2 = wpa_driver_test_init2,
|
||||
.get_interfaces = wpa_driver_test_get_interfaces,
|
||||
.scan2 = wpa_driver_test_scan,
|
||||
.set_freq = wpa_driver_test_set_freq,
|
||||
.send_action = wpa_driver_test_send_action,
|
||||
.alloc_interface_addr = wpa_driver_test_alloc_interface_addr,
|
||||
.release_interface_addr = wpa_driver_test_release_interface_addr,
|
||||
.remain_on_channel = wpa_driver_test_remain_on_channel,
|
||||
.cancel_remain_on_channel = wpa_driver_test_cancel_remain_on_channel,
|
||||
.probe_req_report = wpa_driver_test_probe_req_report,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -383,6 +383,17 @@ static inline int wpa_drv_set_supp_port(struct wpa_supplicant *wpa_s,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static inline int wpa_drv_send_action(struct wpa_supplicant *wpa_s,
|
||||
unsigned int freq,
|
||||
const u8 *dst, const u8 *src,
|
||||
const u8 *data, size_t data_len)
|
||||
{
|
||||
if (wpa_s->driver->send_action)
|
||||
return wpa_s->driver->send_action(wpa_s->drv_priv, freq,
|
||||
dst, src, data, data_len);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static inline int wpa_drv_alloc_interface_addr(struct wpa_supplicant *wpa_s,
|
||||
u8 *addr)
|
||||
{
|
||||
|
|
@ -399,6 +410,25 @@ static inline void wpa_drv_release_interface_addr(struct wpa_supplicant *wpa_s,
|
|||
wpa_s->driver->release_interface_addr(wpa_s->drv_priv, addr);
|
||||
}
|
||||
|
||||
static inline int wpa_drv_remain_on_channel(struct wpa_supplicant *wpa_s,
|
||||
unsigned int freq,
|
||||
unsigned int duration)
|
||||
{
|
||||
if (wpa_s->driver->remain_on_channel)
|
||||
return wpa_s->driver->remain_on_channel(wpa_s->drv_priv, freq,
|
||||
duration);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static inline int wpa_drv_cancel_remain_on_channel(
|
||||
struct wpa_supplicant *wpa_s)
|
||||
{
|
||||
if (wpa_s->driver->cancel_remain_on_channel)
|
||||
return wpa_s->driver->cancel_remain_on_channel(
|
||||
wpa_s->drv_priv);
|
||||
return -1;
|
||||
}
|
||||
|
||||
static inline int wpa_drv_probe_req_report(struct wpa_supplicant *wpa_s,
|
||||
int report)
|
||||
{
|
||||
|
|
|
|||
Loading…
Reference in a new issue