diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/nl80211.h | 93 | ||||
| -rw-r--r-- | include/net/cfg80211.h | 56 |
2 files changed, 108 insertions, 41 deletions
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index 2c87016..8af1e66 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -40,6 +40,43 @@ */ /** + * DOC: Frame transmission/registration support + * + * Frame transmission and registration support exists to allow userspace + * management entities such as wpa_supplicant react to management frames + * that are not being handled by the kernel. This includes, for example, + * certain classes of action frames that cannot be handled in the kernel + * for various reasons. + * + * Frame registration is done on a per-interface basis and registrations + * cannot be removed other than by closing the socket. It is possible to + * specify a registration filter to register, for example, only for a + * certain type of action frame. In particular with action frames, those + * that userspace registers for will not be returned as unhandled by the + * driver, so that the registered application has to take responsibility + * for doing that. + * + * The type of frame that can be registered for is also dependent on the + * driver and interface type. The frame types are advertised in wiphy + * attributes so applications know what to expect. + * + * NOTE: When an interface changes type while registrations are active, + * these registrations are ignored until the interface type is + * changed again. This means that changing the interface type can + * lead to a situation that couldn't otherwise be produced, but + * any such registrations will be dormant in the sense that they + * will not be serviced, i.e. they will not receive any frames. + * + * Frame transmission allows userspace to send for example the required + * responses to action frames. It is subject to some sanity checking, + * but many frames can be transmitted. When a frame was transmitted, its + * status is indicated to the sending socket. + * + * For more technical details, see the corresponding command descriptions + * below. + */ + +/** * enum nl80211_commands - supported nl80211 commands * * @NL80211_CMD_UNSPEC: unspecified command to catch errors @@ -301,16 +338,18 @@ * 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 + * @NL80211_CMD_REGISTER_FRAME: Register for receiving certain mgmt frames + * (via @NL80211_CMD_FRAME) for processing in userspace. This command + * requires an interface index, a frame type attribute (optional for + * backward compatibility reasons, if not given assumes action frames) + * 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_FRAME: Management frame TX request and RX notification. This + * command is used both as a request to transmit a management frame and + * as an event indicating reception of a 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 @@ -320,8 +359,8 @@ * 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 + * @NL80211_CMD_FRAME_TX_STATUS: Report TX status of a management frame + * transmitted with %NL80211_CMD_FRAME. %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. @@ -429,9 +468,12 @@ enum nl80211_commands { NL80211_CMD_SET_TX_BITRATE_MASK, - NL80211_CMD_REGISTER_ACTION, - NL80211_CMD_ACTION, - NL80211_CMD_ACTION_TX_STATUS, + NL80211_CMD_REGISTER_FRAME, + NL80211_CMD_REGISTER_ACTION = NL80211_CMD_REGISTER_FRAME, + NL80211_CMD_FRAME, + NL80211_CMD_ACTION = NL80211_CMD_FRAME, + NL80211_CMD_FRAME_TX_STATUS, + NL80211_CMD_ACTION_TX_STATUS = NL80211_CMD_FRAME_TX_STATUS, NL80211_CMD_SET_POWER_SAVE, NL80211_CMD_GET_POWER_SAVE, @@ -708,7 +750,16 @@ enum nl80211_commands { * 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. + * at least one byte, currently used with @NL80211_CMD_REGISTER_FRAME. + * @NL80211_ATTR_FRAME_TYPE: A u16 indicating the frame type/subtype for the + * @NL80211_CMD_REGISTER_FRAME command. + * @NL80211_ATTR_TX_FRAME_TYPES: wiphy capability attribute, which is a + * nested attribute of %NL80211_ATTR_FRAME_TYPE attributes, containing + * information about which frame types can be transmitted with + * %NL80211_CMD_FRAME. + * @NL80211_ATTR_RX_FRAME_TYPES: wiphy capability attribute, which is a + * nested attribute of %NL80211_ATTR_FRAME_TYPE attributes, containing + * information about which frame types can be registered for RX. * * @NL80211_ATTR_ACK: Flag attribute indicating that the frame was * acknowledged by the recipient. @@ -891,6 +942,10 @@ enum nl80211_attrs { NL80211_ATTR_WIPHY_TX_POWER_SETTING, NL80211_ATTR_WIPHY_TX_POWER_LEVEL, + NL80211_ATTR_TX_FRAME_TYPES, + NL80211_ATTR_RX_FRAME_TYPES, + NL80211_ATTR_FRAME_TYPE, + /* add attributes here, update the policy in nl80211.c */ __NL80211_ATTR_AFTER_LAST, @@ -947,7 +1002,7 @@ enum nl80211_attrs { * @NL80211_IFTYPE_MONITOR: monitor interface receiving all frames * @NL80211_IFTYPE_MESH_POINT: mesh point * @NL80211_IFTYPE_MAX: highest interface type number currently defined - * @__NL80211_IFTYPE_AFTER_LAST: internal use + * @NUM_NL80211_IFTYPES: number of defined interface types * * These values are used with the %NL80211_ATTR_IFTYPE * to set the type of an interface. @@ -964,8 +1019,8 @@ enum nl80211_iftype { NL80211_IFTYPE_MESH_POINT, /* keep last */ - __NL80211_IFTYPE_AFTER_LAST, - NL80211_IFTYPE_MAX = __NL80211_IFTYPE_AFTER_LAST - 1 + NUM_NL80211_IFTYPES, + NL80211_IFTYPE_MAX = NUM_NL80211_IFTYPES - 1 }; /** diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 2b403c7..6a98b1b 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1020,7 +1020,7 @@ struct cfg80211_pmksa { * @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 + * @mgmt_tx: Transmit a management frame * * @testmode_cmd: run a test mode command * @@ -1172,7 +1172,7 @@ struct cfg80211_ops { struct net_device *dev, u64 cookie); - int (*action)(struct wiphy *wiphy, struct net_device *dev, + int (*mgmt_tx)(struct wiphy *wiphy, struct net_device *dev, struct ieee80211_channel *chan, enum nl80211_channel_type channel_type, bool channel_type_valid, @@ -1236,6 +1236,10 @@ struct mac_address { u8 addr[ETH_ALEN]; }; +struct ieee80211_txrx_stypes { + u16 tx, rx; +}; + /** * struct wiphy - wireless hardware description * @reg_notifier: the driver's regulatory notification callback @@ -1286,6 +1290,10 @@ struct mac_address { * @privid: a pointer that drivers can use to identify if an arbitrary * wiphy is theirs, e.g. in global notifiers * @bands: information about bands/channels supported by this device + * + * @mgmt_stypes: bitmasks of frame subtypes that can be subscribed to or + * transmitted through nl80211, points to an array indexed by interface + * type */ struct wiphy { /* assign these fields before you register the wiphy */ @@ -1294,9 +1302,12 @@ struct wiphy { u8 perm_addr[ETH_ALEN]; u8 addr_mask[ETH_ALEN]; - u16 n_addresses; struct mac_address *addresses; + const struct ieee80211_txrx_stypes *mgmt_stypes; + + u16 n_addresses; + /* Supported interface modes, OR together BIT(NL80211_IFTYPE_...) */ u16 interface_modes; @@ -1492,8 +1503,8 @@ struct cfg80211_cached_keys; * 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 + * @mgmt_registrations: list of registrations for management frames + * @mgmt_registrations_lock: lock for the list * @mtx: mutex used to lock data in this struct * @cleanup_work: work struct used for cleanup that can't be done directly */ @@ -1505,8 +1516,8 @@ struct wireless_dev { struct list_head list; struct net_device *netdev; - struct list_head action_registrations; - spinlock_t action_registrations_lock; + struct list_head mgmt_registrations; + spinlock_t mgmt_registrations_lock; struct mutex mtx; @@ -2373,38 +2384,39 @@ 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 + * cfg80211_rx_mgmt - notification of received, unprocessed management frame * @dev: network device * @freq: Frequency on which the frame was received in MHz - * @buf: Action frame (header + body) + * @buf: Management 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) + * + * Returns %true if a user space application has registered for this frame. + * For action frames, that makes it responsible for rejecting unrecognized + * action frames; %false otherwise, in which case for action frames the + * driver is responsible for rejecting the 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); +bool cfg80211_rx_mgmt(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 + * cfg80211_mgmt_tx_status - notification of TX status for management frame * @dev: network device - * @cookie: Cookie returned by cfg80211_ops::action() - * @buf: Action frame (header + body) + * @cookie: Cookie returned by cfg80211_ops::mgmt_tx() + * @buf: Management 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 + * This function is called whenever a management frame was requested to be + * transmitted with cfg80211_ops::mgmt_tx() 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); +void cfg80211_mgmt_tx_status(struct net_device *dev, u64 cookie, + const u8 *buf, size_t len, bool ack, gfp_t gfp); /** |
