Home | History | Annotate | Download | only in p2p
      1 /*
      2  * Wi-Fi Direct - P2P module
      3  * Copyright (c) 2009-2010, Atheros Communications
      4  *
      5  * This software may be distributed under the terms of the BSD license.
      6  * See README for more details.
      7  */
      8 
      9 #ifndef P2P_H
     10 #define P2P_H
     11 
     12 #include "wps/wps_defs.h"
     13 
     14 /**
     15  * P2P_MAX_REG_CLASSES - Maximum number of regulatory classes
     16  */
     17 #define P2P_MAX_REG_CLASSES 10
     18 
     19 /**
     20  * P2P_MAX_REG_CLASS_CHANNELS - Maximum number of channels per regulatory class
     21  */
     22 #define P2P_MAX_REG_CLASS_CHANNELS 20
     23 
     24 /**
     25  * struct p2p_channels - List of supported channels
     26  */
     27 struct p2p_channels {
     28 	/**
     29 	 * struct p2p_reg_class - Supported regulatory class
     30 	 */
     31 	struct p2p_reg_class {
     32 		/**
     33 		 * reg_class - Regulatory class (IEEE 802.11-2007, Annex J)
     34 		 */
     35 		u8 reg_class;
     36 
     37 		/**
     38 		 * channel - Supported channels
     39 		 */
     40 		u8 channel[P2P_MAX_REG_CLASS_CHANNELS];
     41 
     42 		/**
     43 		 * channels - Number of channel entries in use
     44 		 */
     45 		size_t channels;
     46 	} reg_class[P2P_MAX_REG_CLASSES];
     47 
     48 	/**
     49 	 * reg_classes - Number of reg_class entries in use
     50 	 */
     51 	size_t reg_classes;
     52 };
     53 
     54 enum p2p_wps_method {
     55 	WPS_NOT_READY, WPS_PIN_DISPLAY, WPS_PIN_KEYPAD, WPS_PBC, WPS_NFC
     56 };
     57 
     58 /**
     59  * struct p2p_go_neg_results - P2P Group Owner Negotiation results
     60  */
     61 struct p2p_go_neg_results {
     62 	/**
     63 	 * status - Negotiation result (Status Code)
     64 	 *
     65 	 * 0 (P2P_SC_SUCCESS) indicates success. Non-zero values indicate
     66 	 * failed negotiation.
     67 	 */
     68 	int status;
     69 
     70 	/**
     71 	 * role_go - Whether local end is Group Owner
     72 	 */
     73 	int role_go;
     74 
     75 	/**
     76 	 * freq - Frequency of the group operational channel in MHz
     77 	 */
     78 	int freq;
     79 
     80 	int ht40;
     81 
     82 	int vht;
     83 
     84 	/**
     85 	 * ssid - SSID of the group
     86 	 */
     87 	u8 ssid[32];
     88 
     89 	/**
     90 	 * ssid_len - Length of SSID in octets
     91 	 */
     92 	size_t ssid_len;
     93 
     94 	/**
     95 	 * psk - WPA pre-shared key (256 bits) (GO only)
     96 	 */
     97 	u8 psk[32];
     98 
     99 	/**
    100 	 * psk_set - Whether PSK field is configured (GO only)
    101 	 */
    102 	int psk_set;
    103 
    104 	/**
    105 	 * passphrase - WPA2-Personal passphrase for the group (GO only)
    106 	 */
    107 	char passphrase[64];
    108 
    109 	/**
    110 	 * peer_device_addr - P2P Device Address of the peer
    111 	 */
    112 	u8 peer_device_addr[ETH_ALEN];
    113 
    114 	/**
    115 	 * peer_interface_addr - P2P Interface Address of the peer
    116 	 */
    117 	u8 peer_interface_addr[ETH_ALEN];
    118 
    119 	/**
    120 	 * wps_method - WPS method to be used during provisioning
    121 	 */
    122 	enum p2p_wps_method wps_method;
    123 
    124 #define P2P_MAX_CHANNELS 50
    125 
    126 	/**
    127 	 * freq_list - Zero-terminated list of possible operational channels
    128 	 */
    129 	int freq_list[P2P_MAX_CHANNELS];
    130 
    131 	/**
    132 	 * persistent_group - Whether the group should be made persistent
    133 	 * 0 = not persistent
    134 	 * 1 = persistent group without persistent reconnect
    135 	 * 2 = persistent group with persistent reconnect
    136 	 */
    137 	int persistent_group;
    138 
    139 	/**
    140 	 * peer_config_timeout - Peer configuration timeout (in 10 msec units)
    141 	 */
    142 	unsigned int peer_config_timeout;
    143 };
    144 
    145 struct p2p_data;
    146 
    147 enum p2p_scan_type {
    148 	P2P_SCAN_SOCIAL,
    149 	P2P_SCAN_FULL,
    150 	P2P_SCAN_SOCIAL_PLUS_ONE
    151 };
    152 
    153 #define P2P_MAX_WPS_VENDOR_EXT 10
    154 
    155 /**
    156  * struct p2p_peer_info - P2P peer information
    157  */
    158 struct p2p_peer_info {
    159 	/**
    160 	 * p2p_device_addr - P2P Device Address of the peer
    161 	 */
    162 	u8 p2p_device_addr[ETH_ALEN];
    163 
    164 	/**
    165 	 * pri_dev_type - Primary Device Type
    166 	 */
    167 	u8 pri_dev_type[8];
    168 
    169 	/**
    170 	 * device_name - Device Name (0..32 octets encoded in UTF-8)
    171 	 */
    172 	char device_name[33];
    173 
    174 	/**
    175 	 * manufacturer - Manufacturer (0..64 octets encoded in UTF-8)
    176 	 */
    177 	char manufacturer[65];
    178 
    179 	/**
    180 	 * model_name - Model Name (0..32 octets encoded in UTF-8)
    181 	 */
    182 	char model_name[33];
    183 
    184 	/**
    185 	 * model_number - Model Number (0..32 octets encoded in UTF-8)
    186 	 */
    187 	char model_number[33];
    188 
    189 	/**
    190 	 * serial_number - Serial Number (0..32 octets encoded in UTF-8)
    191 	 */
    192 	char serial_number[33];
    193 
    194 	/**
    195 	 * level - Signal level
    196 	 */
    197 	int level;
    198 
    199 	/**
    200 	 * config_methods - WPS Configuration Methods
    201 	 */
    202 	u16 config_methods;
    203 
    204 	/**
    205 	 * dev_capab - Device Capabilities
    206 	 */
    207 	u8 dev_capab;
    208 
    209 	/**
    210 	 * group_capab - Group Capabilities
    211 	 */
    212 	u8 group_capab;
    213 
    214 	/**
    215 	 * wps_sec_dev_type_list - WPS secondary device type list
    216 	 *
    217 	 * This list includes from 0 to 16 Secondary Device Types as indicated
    218 	 * by wps_sec_dev_type_list_len (8 * number of types).
    219 	 */
    220 	u8 wps_sec_dev_type_list[128];
    221 
    222 	/**
    223 	 * wps_sec_dev_type_list_len - Length of secondary device type list
    224 	 */
    225 	size_t wps_sec_dev_type_list_len;
    226 
    227 	struct wpabuf *wps_vendor_ext[P2P_MAX_WPS_VENDOR_EXT];
    228 
    229 	/**
    230 	 * wfd_subelems - Wi-Fi Display subelements from WFD IE(s)
    231 	 */
    232 	struct wpabuf *wfd_subelems;
    233 
    234 	/**
    235 	 * vendor_elems - Unrecognized vendor elements
    236 	 *
    237 	 * This buffer includes any other vendor element than P2P, WPS, and WFD
    238 	 * IE(s) from the frame that was used to discover the peer.
    239 	 */
    240 	struct wpabuf *vendor_elems;
    241 };
    242 
    243 enum p2p_prov_disc_status {
    244 	P2P_PROV_DISC_SUCCESS,
    245 	P2P_PROV_DISC_TIMEOUT,
    246 	P2P_PROV_DISC_REJECTED,
    247 	P2P_PROV_DISC_TIMEOUT_JOIN,
    248 };
    249 
    250 struct p2p_channel {
    251 	u8 op_class;
    252 	u8 chan;
    253 };
    254 
    255 /**
    256  * struct p2p_config - P2P configuration
    257  *
    258  * This configuration is provided to the P2P module during initialization with
    259  * p2p_init().
    260  */
    261 struct p2p_config {
    262 	/**
    263 	 * country - Country code to use in P2P operations
    264 	 */
    265 	char country[3];
    266 
    267 	/**
    268 	 * reg_class - Regulatory class for own listen channel
    269 	 */
    270 	u8 reg_class;
    271 
    272 	/**
    273 	 * channel - Own listen channel
    274 	 */
    275 	u8 channel;
    276 
    277 	/**
    278 	 * channel_forced - the listen channel was forced by configuration
    279 	 *                  or by control interface and cannot be overridden
    280 	 */
    281 	u8 channel_forced;
    282 
    283 	/**
    284 	 * Regulatory class for own operational channel
    285 	 */
    286 	u8 op_reg_class;
    287 
    288 	/**
    289 	 * op_channel - Own operational channel
    290 	 */
    291 	u8 op_channel;
    292 
    293 	/**
    294 	 * cfg_op_channel - Whether op_channel is hardcoded in configuration
    295 	 */
    296 	u8 cfg_op_channel;
    297 
    298 	/**
    299 	 * channels - Own supported regulatory classes and channels
    300 	 *
    301 	 * List of supposerted channels per regulatory class. The regulatory
    302 	 * classes are defined in IEEE Std 802.11-2007 Annex J and the
    303 	 * numbering of the clases depends on the configured country code.
    304 	 */
    305 	struct p2p_channels channels;
    306 
    307 	/**
    308 	 * cli_channels - Additional client channels
    309 	 *
    310 	 * This list of channels (if any) will be used when advertising local
    311 	 * channels during GO Negotiation or Invitation for the cases where the
    312 	 * local end may become the client. This may allow the peer to become a
    313 	 * GO on additional channels if it supports these options. The main use
    314 	 * case for this is to include passive-scan channels on devices that may
    315 	 * not know their current location and have configured most channels to
    316 	 * not allow initiation of radition (i.e., another device needs to take
    317 	 * master responsibilities).
    318 	 */
    319 	struct p2p_channels cli_channels;
    320 
    321 	/**
    322 	 * num_pref_chan - Number of pref_chan entries
    323 	 */
    324 	unsigned int num_pref_chan;
    325 
    326 	/**
    327 	 * pref_chan - Preferred channels for GO Negotiation
    328 	 */
    329 	struct p2p_channel *pref_chan;
    330 
    331 	/**
    332 	 * pri_dev_type - Primary Device Type (see WPS)
    333 	 */
    334 	u8 pri_dev_type[8];
    335 
    336 	/**
    337 	 * P2P_SEC_DEVICE_TYPES - Maximum number of secondary device types
    338 	 */
    339 #define P2P_SEC_DEVICE_TYPES 5
    340 
    341 	/**
    342 	 * sec_dev_type - Optional secondary device types
    343 	 */
    344 	u8 sec_dev_type[P2P_SEC_DEVICE_TYPES][8];
    345 
    346 	/**
    347 	 * num_sec_dev_types - Number of sec_dev_type entries
    348 	 */
    349 	size_t num_sec_dev_types;
    350 
    351 	/**
    352 	 * dev_addr - P2P Device Address
    353 	 */
    354 	u8 dev_addr[ETH_ALEN];
    355 
    356 	/**
    357 	 * dev_name - Device Name
    358 	 */
    359 	char *dev_name;
    360 
    361 	char *manufacturer;
    362 	char *model_name;
    363 	char *model_number;
    364 	char *serial_number;
    365 
    366 	u8 uuid[16];
    367 	u16 config_methods;
    368 
    369 	/**
    370 	 * concurrent_operations - Whether concurrent operations are supported
    371 	 */
    372 	int concurrent_operations;
    373 
    374 	/**
    375 	 * max_peers - Maximum number of discovered peers to remember
    376 	 *
    377 	 * If more peers are discovered, older entries will be removed to make
    378 	 * room for the new ones.
    379 	 */
    380 	size_t max_peers;
    381 
    382 	/**
    383 	 * p2p_intra_bss - Intra BSS communication is supported
    384 	 */
    385 	int p2p_intra_bss;
    386 
    387 	/**
    388 	 * ssid_postfix - Postfix data to add to the SSID
    389 	 *
    390 	 * This data will be added to the end of the SSID after the
    391 	 * DIRECT-<random two octets> prefix.
    392 	 */
    393 	u8 ssid_postfix[32 - 9];
    394 
    395 	/**
    396 	 * ssid_postfix_len - Length of the ssid_postfix data
    397 	 */
    398 	size_t ssid_postfix_len;
    399 
    400 	/**
    401 	 * max_listen - Maximum listen duration in ms
    402 	 */
    403 	unsigned int max_listen;
    404 
    405 	/**
    406 	 * passphrase_len - Passphrase length (8..63)
    407 	 *
    408 	 * This parameter controls the length of the random passphrase that is
    409 	 * generated at the GO.
    410 	 */
    411 	unsigned int passphrase_len;
    412 
    413 	/**
    414 	 * cb_ctx - Context to use with callback functions
    415 	 */
    416 	void *cb_ctx;
    417 
    418 	/**
    419 	 * debug_print - Debug print
    420 	 * @ctx: Callback context from cb_ctx
    421 	 * @level: Debug verbosity level (MSG_*)
    422 	 * @msg: Debug message
    423 	 */
    424 	void (*debug_print)(void *ctx, int level, const char *msg);
    425 
    426 
    427 	/* Callbacks to request lower layer driver operations */
    428 
    429 	/**
    430 	 * p2p_scan - Request a P2P scan/search
    431 	 * @ctx: Callback context from cb_ctx
    432 	 * @type: Scan type
    433 	 * @freq: Specific frequency (MHz) to scan or 0 for no restriction
    434 	 * @num_req_dev_types: Number of requested device types
    435 	 * @req_dev_types: Array containing requested device types
    436 	 * @dev_id: Device ID to search for or %NULL to find all devices
    437 	 * @pw_id: Device Password ID
    438 	 * Returns: 0 on success, -1 on failure
    439 	 *
    440 	 * This callback function is used to request a P2P scan or search
    441 	 * operation to be completed. Type type argument specifies which type
    442 	 * of scan is to be done. @P2P_SCAN_SOCIAL indicates that only the
    443 	 * social channels (1, 6, 11) should be scanned. @P2P_SCAN_FULL
    444 	 * indicates that all channels are to be scanned.
    445 	 * @P2P_SCAN_SOCIAL_PLUS_ONE request scan of all the social channels
    446 	 * plus one extra channel specified by freq.
    447 	 *
    448 	 * The full scan is used for the initial scan to find group owners from
    449 	 * all. The other types are used during search phase scan of the social
    450 	 * channels (with potential variation if the Listen channel of the
    451 	 * target peer is known or if other channels are scanned in steps).
    452 	 *
    453 	 * The scan results are returned after this call by calling
    454 	 * p2p_scan_res_handler() for each scan result that has a P2P IE and
    455 	 * then calling p2p_scan_res_handled() to indicate that all scan
    456 	 * results have been indicated.
    457 	 */
    458 	int (*p2p_scan)(void *ctx, enum p2p_scan_type type, int freq,
    459 			unsigned int num_req_dev_types,
    460 			const u8 *req_dev_types, const u8 *dev_id, u16 pw_id);
    461 
    462 	/**
    463 	 * send_probe_resp - Transmit a Probe Response frame
    464 	 * @ctx: Callback context from cb_ctx
    465 	 * @buf: Probe Response frame (including the header and body)
    466 	 * Returns: 0 on success, -1 on failure
    467 	 *
    468 	 * This function is used to reply to Probe Request frames that were
    469 	 * indicated with a call to p2p_probe_req_rx(). The response is to be
    470 	 * sent on the same channel or to be dropped if the driver is not
    471 	 * anymore listening to Probe Request frames.
    472 	 *
    473 	 * Alternatively, the responsibility for building the Probe Response
    474 	 * frames in Listen state may be in another system component in which
    475 	 * case this function need to be implemented (i.e., the function
    476 	 * pointer can be %NULL). The WPS and P2P IEs to be added for Probe
    477 	 * Response frames in such a case are available from the
    478 	 * start_listen() callback. It should be noted that the received Probe
    479 	 * Request frames must be indicated by calling p2p_probe_req_rx() even
    480 	 * if this send_probe_resp() is not used.
    481 	 */
    482 	int (*send_probe_resp)(void *ctx, const struct wpabuf *buf);
    483 
    484 	/**
    485 	 * send_action - Transmit an Action frame
    486 	 * @ctx: Callback context from cb_ctx
    487 	 * @freq: Frequency in MHz for the channel on which to transmit
    488 	 * @dst: Destination MAC address (Address 1)
    489 	 * @src: Source MAC address (Address 2)
    490 	 * @bssid: BSSID (Address 3)
    491 	 * @buf: Frame body (starting from Category field)
    492 	 * @len: Length of buf in octets
    493 	 * @wait_time: How many msec to wait for a response frame
    494 	 * Returns: 0 on success, -1 on failure
    495 	 *
    496 	 * The Action frame may not be transmitted immediately and the status
    497 	 * of the transmission must be reported by calling
    498 	 * p2p_send_action_cb() once the frame has either been transmitted or
    499 	 * it has been dropped due to excessive retries or other failure to
    500 	 * transmit.
    501 	 */
    502 	int (*send_action)(void *ctx, unsigned int freq, const u8 *dst,
    503 			   const u8 *src, const u8 *bssid, const u8 *buf,
    504 			   size_t len, unsigned int wait_time);
    505 
    506 	/**
    507 	 * send_action_done - Notify that Action frame sequence was completed
    508 	 * @ctx: Callback context from cb_ctx
    509 	 *
    510 	 * This function is called when the Action frame sequence that was
    511 	 * started with send_action() has been completed, i.e., when there is
    512 	 * no need to wait for a response from the destination peer anymore.
    513 	 */
    514 	void (*send_action_done)(void *ctx);
    515 
    516 	/**
    517 	 * start_listen - Start Listen state
    518 	 * @ctx: Callback context from cb_ctx
    519 	 * @freq: Frequency of the listen channel in MHz
    520 	 * @duration: Duration for the Listen state in milliseconds
    521 	 * @probe_resp_ie: IE(s) to be added to Probe Response frames
    522 	 * Returns: 0 on success, -1 on failure
    523 	 *
    524 	 * This Listen state may not start immediately since the driver may
    525 	 * have other pending operations to complete first. Once the Listen
    526 	 * state has started, p2p_listen_cb() must be called to notify the P2P
    527 	 * module. Once the Listen state is stopped, p2p_listen_end() must be
    528 	 * called to notify the P2P module that the driver is not in the Listen
    529 	 * state anymore.
    530 	 *
    531 	 * If the send_probe_resp() is not used for generating the response,
    532 	 * the IEs from probe_resp_ie need to be added to the end of the Probe
    533 	 * Response frame body. If send_probe_resp() is used, the probe_resp_ie
    534 	 * information can be ignored.
    535 	 */
    536 	int (*start_listen)(void *ctx, unsigned int freq,
    537 			    unsigned int duration,
    538 			    const struct wpabuf *probe_resp_ie);
    539 	/**
    540 	 * stop_listen - Stop Listen state
    541 	 * @ctx: Callback context from cb_ctx
    542 	 *
    543 	 * This callback can be used to stop a Listen state operation that was
    544 	 * previously requested with start_listen().
    545 	 */
    546 	void (*stop_listen)(void *ctx);
    547 
    548 	/**
    549 	 * get_noa - Get current Notice of Absence attribute payload
    550 	 * @ctx: Callback context from cb_ctx
    551 	 * @interface_addr: P2P Interface Address of the GO
    552 	 * @buf: Buffer for returning NoA
    553 	 * @buf_len: Buffer length in octets
    554 	 * Returns: Number of octets used in buf, 0 to indicate no NoA is being
    555 	 * advertized, or -1 on failure
    556 	 *
    557 	 * This function is used to fetch the current Notice of Absence
    558 	 * attribute value from GO.
    559 	 */
    560 	int (*get_noa)(void *ctx, const u8 *interface_addr, u8 *buf,
    561 		       size_t buf_len);
    562 
    563 	/* Callbacks to notify events to upper layer management entity */
    564 
    565 	/**
    566 	 * dev_found - Notification of a found P2P Device
    567 	 * @ctx: Callback context from cb_ctx
    568 	 * @addr: Source address of the message triggering this notification
    569 	 * @info: P2P peer information
    570 	 * @new_device: Inform if the peer is newly found
    571 	 *
    572 	 * This callback is used to notify that a new P2P Device has been
    573 	 * found. This may happen, e.g., during Search state based on scan
    574 	 * results or during Listen state based on receive Probe Request and
    575 	 * Group Owner Negotiation Request.
    576 	 */
    577 	void (*dev_found)(void *ctx, const u8 *addr,
    578 			  const struct p2p_peer_info *info,
    579 			  int new_device);
    580 
    581 	/**
    582 	 * dev_lost - Notification of a lost P2P Device
    583 	 * @ctx: Callback context from cb_ctx
    584 	 * @dev_addr: P2P Device Address of the lost P2P Device
    585 	 *
    586 	 * This callback is used to notify that a P2P Device has been deleted.
    587 	 */
    588 	void (*dev_lost)(void *ctx, const u8 *dev_addr);
    589 
    590 	/**
    591 	 * find_stopped - Notification of a p2p_find operation stopping
    592 	 * @ctx: Callback context from cb_ctx
    593 	 */
    594 	void (*find_stopped)(void *ctx);
    595 
    596 	/**
    597 	 * go_neg_req_rx - Notification of a receive GO Negotiation Request
    598 	 * @ctx: Callback context from cb_ctx
    599 	 * @src: Source address of the message triggering this notification
    600 	 * @dev_passwd_id: WPS Device Password ID
    601 	 *
    602 	 * This callback is used to notify that a P2P Device is requesting
    603 	 * group owner negotiation with us, but we do not have all the
    604 	 * necessary information to start GO Negotiation. This indicates that
    605 	 * the local user has not authorized the connection yet by providing a
    606 	 * PIN or PBC button press. This information can be provided with a
    607 	 * call to p2p_connect().
    608 	 */
    609 	void (*go_neg_req_rx)(void *ctx, const u8 *src, u16 dev_passwd_id);
    610 
    611 	/**
    612 	 * go_neg_completed - Notification of GO Negotiation results
    613 	 * @ctx: Callback context from cb_ctx
    614 	 * @res: GO Negotiation results
    615 	 *
    616 	 * This callback is used to notify that Group Owner Negotiation has
    617 	 * been completed. Non-zero struct p2p_go_neg_results::status indicates
    618 	 * failed negotiation. In case of success, this function is responsible
    619 	 * for creating a new group interface (or using the existing interface
    620 	 * depending on driver features), setting up the group interface in
    621 	 * proper mode based on struct p2p_go_neg_results::role_go and
    622 	 * initializing WPS provisioning either as a Registrar (if GO) or as an
    623 	 * Enrollee. Successful WPS provisioning must be indicated by calling
    624 	 * p2p_wps_success_cb(). The callee is responsible for timing out group
    625 	 * formation if WPS provisioning cannot be completed successfully
    626 	 * within 15 seconds.
    627 	 */
    628 	void (*go_neg_completed)(void *ctx, struct p2p_go_neg_results *res);
    629 
    630 	/**
    631 	 * sd_request - Callback on Service Discovery Request
    632 	 * @ctx: Callback context from cb_ctx
    633 	 * @freq: Frequency (in MHz) of the channel
    634 	 * @sa: Source address of the request
    635 	 * @dialog_token: Dialog token
    636 	 * @update_indic: Service Update Indicator from the source of request
    637 	 * @tlvs: P2P Service Request TLV(s)
    638 	 * @tlvs_len: Length of tlvs buffer in octets
    639 	 *
    640 	 * This callback is used to indicate reception of a service discovery
    641 	 * request. Response to the query must be indicated by calling
    642 	 * p2p_sd_response() with the context information from the arguments to
    643 	 * this callback function.
    644 	 *
    645 	 * This callback handler can be set to %NULL to indicate that service
    646 	 * discovery is not supported.
    647 	 */
    648 	void (*sd_request)(void *ctx, int freq, const u8 *sa, u8 dialog_token,
    649 			   u16 update_indic, const u8 *tlvs, size_t tlvs_len);
    650 
    651 	/**
    652 	 * sd_response - Callback on Service Discovery Response
    653 	 * @ctx: Callback context from cb_ctx
    654 	 * @sa: Source address of the request
    655 	 * @update_indic: Service Update Indicator from the source of response
    656 	 * @tlvs: P2P Service Response TLV(s)
    657 	 * @tlvs_len: Length of tlvs buffer in octets
    658 	 *
    659 	 * This callback is used to indicate reception of a service discovery
    660 	 * response. This callback handler can be set to %NULL if no service
    661 	 * discovery requests are used. The information provided with this call
    662 	 * is replies to the queries scheduled with p2p_sd_request().
    663 	 */
    664 	void (*sd_response)(void *ctx, const u8 *sa, u16 update_indic,
    665 			    const u8 *tlvs, size_t tlvs_len);
    666 
    667 	/**
    668 	 * prov_disc_req - Callback on Provisiong Discovery Request
    669 	 * @ctx: Callback context from cb_ctx
    670 	 * @peer: Source address of the request
    671 	 * @config_methods: Requested WPS Config Method
    672 	 * @dev_addr: P2P Device Address of the found P2P Device
    673 	 * @pri_dev_type: Primary Device Type
    674 	 * @dev_name: Device Name
    675 	 * @supp_config_methods: Supported configuration Methods
    676 	 * @dev_capab: Device Capabilities
    677 	 * @group_capab: Group Capabilities
    678 	 * @group_id: P2P Group ID (or %NULL if not included)
    679 	 * @group_id_len: Length of P2P Group ID
    680 	 *
    681 	 * This callback is used to indicate reception of a Provision Discovery
    682 	 * Request frame that the P2P module accepted.
    683 	 */
    684 	void (*prov_disc_req)(void *ctx, const u8 *peer, u16 config_methods,
    685 			      const u8 *dev_addr, const u8 *pri_dev_type,
    686 			      const char *dev_name, u16 supp_config_methods,
    687 			      u8 dev_capab, u8 group_capab,
    688 			      const u8 *group_id, size_t group_id_len);
    689 
    690 	/**
    691 	 * prov_disc_resp - Callback on Provisiong Discovery Response
    692 	 * @ctx: Callback context from cb_ctx
    693 	 * @peer: Source address of the response
    694 	 * @config_methods: Value from p2p_prov_disc_req() or 0 on failure
    695 	 *
    696 	 * This callback is used to indicate reception of a Provision Discovery
    697 	 * Response frame for a pending request scheduled with
    698 	 * p2p_prov_disc_req(). This callback handler can be set to %NULL if
    699 	 * provision discovery is not used.
    700 	 */
    701 	void (*prov_disc_resp)(void *ctx, const u8 *peer, u16 config_methods);
    702 
    703 	/**
    704 	 * prov_disc_fail - Callback on Provision Discovery failure
    705 	 * @ctx: Callback context from cb_ctx
    706 	 * @peer: Source address of the response
    707 	 * @status: Cause of failure, will not be %P2P_PROV_DISC_SUCCESS
    708 	 *
    709 	 * This callback is used to indicate either a failure or no response
    710 	 * to an earlier provision discovery request.
    711 	 *
    712 	 * This callback handler can be set to %NULL if provision discovery
    713 	 * is not used or failures do not need to be indicated.
    714 	 */
    715 	void (*prov_disc_fail)(void *ctx, const u8 *peer,
    716 			       enum p2p_prov_disc_status status);
    717 
    718 	/**
    719 	 * invitation_process - Optional callback for processing Invitations
    720 	 * @ctx: Callback context from cb_ctx
    721 	 * @sa: Source address of the Invitation Request
    722 	 * @bssid: P2P Group BSSID from the request or %NULL if not included
    723 	 * @go_dev_addr: GO Device Address from P2P Group ID
    724 	 * @ssid: SSID from P2P Group ID
    725 	 * @ssid_len: Length of ssid buffer in octets
    726 	 * @go: Variable for returning whether the local end is GO in the group
    727 	 * @group_bssid: Buffer for returning P2P Group BSSID (if local end GO)
    728 	 * @force_freq: Variable for returning forced frequency for the group
    729 	 * @persistent_group: Whether this is an invitation to reinvoke a
    730 	 *	persistent group (instead of invitation to join an active
    731 	 *	group)
    732 	 * @channels: Available operating channels for the group
    733 	 * @dev_pw_id: Device Password ID for NFC static handover or -1 if not
    734 	 *	used
    735 	 * Returns: Status code (P2P_SC_*)
    736 	 *
    737 	 * This optional callback can be used to implement persistent reconnect
    738 	 * by allowing automatic restarting of persistent groups without user
    739 	 * interaction. If this callback is not implemented (i.e., is %NULL),
    740 	 * the received Invitation Request frames are replied with
    741 	 * %P2P_SC_REQ_RECEIVED status and indicated to upper layer with the
    742 	 * invitation_result() callback.
    743 	 *
    744 	 * If the requested parameters are acceptable and the group is known,
    745 	 * %P2P_SC_SUCCESS may be returned. If the requested group is unknown,
    746 	 * %P2P_SC_FAIL_UNKNOWN_GROUP should be returned. %P2P_SC_REQ_RECEIVED
    747 	 * can be returned if there is not enough data to provide immediate
    748 	 * response, i.e., if some sort of user interaction is needed. The
    749 	 * invitation_received() callback will be called in that case
    750 	 * immediately after this call.
    751 	 */
    752 	u8 (*invitation_process)(void *ctx, const u8 *sa, const u8 *bssid,
    753 				 const u8 *go_dev_addr, const u8 *ssid,
    754 				 size_t ssid_len, int *go, u8 *group_bssid,
    755 				 int *force_freq, int persistent_group,
    756 				 const struct p2p_channels *channels,
    757 				 int dev_pw_id);
    758 
    759 	/**
    760 	 * invitation_received - Callback on Invitation Request RX
    761 	 * @ctx: Callback context from cb_ctx
    762 	 * @sa: Source address of the Invitation Request
    763 	 * @bssid: P2P Group BSSID or %NULL if not received
    764 	 * @ssid: SSID of the group
    765 	 * @ssid_len: Length of ssid in octets
    766 	 * @go_dev_addr: GO Device Address
    767 	 * @status: Response Status
    768 	 * @op_freq: Operational frequency for the group
    769 	 *
    770 	 * This callback is used to indicate sending of an Invitation Response
    771 	 * for a received Invitation Request. If status == 0 (success), the
    772 	 * upper layer code is responsible for starting the group. status == 1
    773 	 * indicates need to get user authorization for the group. Other status
    774 	 * values indicate that the invitation request was rejected.
    775 	 */
    776 	void (*invitation_received)(void *ctx, const u8 *sa, const u8 *bssid,
    777 				    const u8 *ssid, size_t ssid_len,
    778 				    const u8 *go_dev_addr, u8 status,
    779 				    int op_freq);
    780 
    781 	/**
    782 	 * invitation_result - Callback on Invitation result
    783 	 * @ctx: Callback context from cb_ctx
    784 	 * @status: Negotiation result (Status Code)
    785 	 * @bssid: P2P Group BSSID or %NULL if not received
    786 	 * @channels: Available operating channels for the group
    787 	 * @addr: Peer address
    788 	 * @freq: Frequency (in MHz) indicated during invitation or 0
    789 	 * @peer_oper_freq: Operating frequency (in MHz) advertized by the peer
    790 	 * during invitation or 0
    791 	 *
    792 	 * This callback is used to indicate result of an Invitation procedure
    793 	 * started with a call to p2p_invite(). The indicated status code is
    794 	 * the value received from the peer in Invitation Response with 0
    795 	 * (P2P_SC_SUCCESS) indicating success or -1 to indicate a timeout or a
    796 	 * local failure in transmitting the Invitation Request.
    797 	 */
    798 	void (*invitation_result)(void *ctx, int status, const u8 *bssid,
    799 				  const struct p2p_channels *channels,
    800 				  const u8 *addr, int freq, int peer_oper_freq);
    801 
    802 	/**
    803 	 * go_connected - Check whether we are connected to a GO
    804 	 * @ctx: Callback context from cb_ctx
    805 	 * @dev_addr: P2P Device Address of a GO
    806 	 * Returns: 1 if we are connected as a P2P client to the specified GO
    807 	 * or 0 if not.
    808 	 */
    809 	int (*go_connected)(void *ctx, const u8 *dev_addr);
    810 
    811 	/**
    812 	 * presence_resp - Callback on Presence Response
    813 	 * @ctx: Callback context from cb_ctx
    814 	 * @src: Source address (GO's P2P Interface Address)
    815 	 * @status: Result of the request (P2P_SC_*)
    816 	 * @noa: Returned NoA value
    817 	 * @noa_len: Length of the NoA buffer in octets
    818 	 */
    819 	void (*presence_resp)(void *ctx, const u8 *src, u8 status,
    820 			      const u8 *noa, size_t noa_len);
    821 
    822 	/**
    823 	 * is_concurrent_session_active - Check whether concurrent session is
    824 	 * active on other virtual interfaces
    825 	 * @ctx: Callback context from cb_ctx
    826 	 * Returns: 1 if concurrent session is active on other virtual interface
    827 	 * or 0 if not.
    828 	 */
    829 	int (*is_concurrent_session_active)(void *ctx);
    830 
    831 	/**
    832 	 * is_p2p_in_progress - Check whether P2P operation is in progress
    833 	 * @ctx: Callback context from cb_ctx
    834 	 * Returns: 1 if P2P operation (e.g., group formation) is in progress
    835 	 * or 0 if not.
    836 	 */
    837 	int (*is_p2p_in_progress)(void *ctx);
    838 };
    839 
    840 
    841 /* P2P module initialization/deinitialization */
    842 
    843 /**
    844  * p2p_init - Initialize P2P module
    845  * @cfg: P2P module configuration
    846  * Returns: Pointer to private data or %NULL on failure
    847  *
    848  * This function is used to initialize global P2P module context (one per
    849  * device). The P2P module will keep a copy of the configuration data, so the
    850  * caller does not need to maintain this structure. However, the callback
    851  * functions and the context parameters to them must be kept available until
    852  * the P2P module is deinitialized with p2p_deinit().
    853  */
    854 struct p2p_data * p2p_init(const struct p2p_config *cfg);
    855 
    856 /**
    857  * p2p_deinit - Deinitialize P2P module
    858  * @p2p: P2P module context from p2p_init()
    859  */
    860 void p2p_deinit(struct p2p_data *p2p);
    861 
    862 /**
    863  * p2p_flush - Flush P2P module state
    864  * @p2p: P2P module context from p2p_init()
    865  *
    866  * This command removes the P2P module state like peer device entries.
    867  */
    868 void p2p_flush(struct p2p_data *p2p);
    869 
    870 /**
    871  * p2p_unauthorize - Unauthorize the specified peer device
    872  * @p2p: P2P module context from p2p_init()
    873  * @addr: P2P peer entry to be unauthorized
    874  * Returns: 0 on success, -1 on failure
    875  *
    876  * This command removes any connection authorization from the specified P2P
    877  * peer device address. This can be used, e.g., to cancel effect of a previous
    878  * p2p_authorize() or p2p_connect() call that has not yet resulted in completed
    879  * GO Negotiation.
    880  */
    881 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr);
    882 
    883 /**
    884  * p2p_set_dev_name - Set device name
    885  * @p2p: P2P module context from p2p_init()
    886  * Returns: 0 on success, -1 on failure
    887  *
    888  * This function can be used to update the P2P module configuration with
    889  * information that was not available at the time of the p2p_init() call.
    890  */
    891 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name);
    892 
    893 int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer);
    894 int p2p_set_model_name(struct p2p_data *p2p, const char *model_name);
    895 int p2p_set_model_number(struct p2p_data *p2p, const char *model_number);
    896 int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number);
    897 
    898 void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods);
    899 void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid);
    900 
    901 /**
    902  * p2p_set_pri_dev_type - Set primary device type
    903  * @p2p: P2P module context from p2p_init()
    904  * Returns: 0 on success, -1 on failure
    905  *
    906  * This function can be used to update the P2P module configuration with
    907  * information that was not available at the time of the p2p_init() call.
    908  */
    909 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type);
    910 
    911 /**
    912  * p2p_set_sec_dev_types - Set secondary device types
    913  * @p2p: P2P module context from p2p_init()
    914  * Returns: 0 on success, -1 on failure
    915  *
    916  * This function can be used to update the P2P module configuration with
    917  * information that was not available at the time of the p2p_init() call.
    918  */
    919 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
    920 			  size_t num_dev_types);
    921 
    922 int p2p_set_country(struct p2p_data *p2p, const char *country);
    923 
    924 
    925 /* Commands from upper layer management entity */
    926 
    927 enum p2p_discovery_type {
    928 	P2P_FIND_START_WITH_FULL,
    929 	P2P_FIND_ONLY_SOCIAL,
    930 	P2P_FIND_PROGRESSIVE
    931 };
    932 
    933 /**
    934  * p2p_find - Start P2P Find (Device Discovery)
    935  * @p2p: P2P module context from p2p_init()
    936  * @timeout: Timeout for find operation in seconds or 0 for no timeout
    937  * @type: Device Discovery type
    938  * @num_req_dev_types: Number of requested device types
    939  * @req_dev_types: Requested device types array, must be an array
    940  *	containing num_req_dev_types * WPS_DEV_TYPE_LEN bytes; %NULL if no
    941  *	requested device types.
    942  * @dev_id: Device ID to search for or %NULL to find all devices
    943  * @search_delay: Extra delay in milliseconds between search iterations
    944  * Returns: 0 on success, -1 on failure
    945  */
    946 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
    947 	     enum p2p_discovery_type type,
    948 	     unsigned int num_req_dev_types, const u8 *req_dev_types,
    949 	     const u8 *dev_id, unsigned int search_delay);
    950 
    951 /**
    952  * p2p_stop_find - Stop P2P Find (Device Discovery)
    953  * @p2p: P2P module context from p2p_init()
    954  */
    955 void p2p_stop_find(struct p2p_data *p2p);
    956 
    957 /**
    958  * p2p_stop_find_for_freq - Stop P2P Find for next oper on specific freq
    959  * @p2p: P2P module context from p2p_init()
    960  * @freq: Frequency in MHz for next operation
    961  *
    962  * This is like p2p_stop_find(), but Listen state is not stopped if we are
    963  * already on the same frequency.
    964  */
    965 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq);
    966 
    967 /**
    968  * p2p_listen - Start P2P Listen state for specified duration
    969  * @p2p: P2P module context from p2p_init()
    970  * @timeout: Listen state duration in milliseconds
    971  * Returns: 0 on success, -1 on failure
    972  *
    973  * This function can be used to request the P2P module to keep the device
    974  * discoverable on the listen channel for an extended set of time. At least in
    975  * its current form, this is mainly used for testing purposes and may not be of
    976  * much use for normal P2P operations.
    977  */
    978 int p2p_listen(struct p2p_data *p2p, unsigned int timeout);
    979 
    980 /**
    981  * p2p_stop_listen - Stop P2P Listen
    982  * @p2p: P2P module context from p2p_init()
    983  */
    984 void p2p_stop_listen(struct p2p_data *p2p);
    985 
    986 /**
    987  * p2p_connect - Start P2P group formation (GO negotiation)
    988  * @p2p: P2P module context from p2p_init()
    989  * @peer_addr: MAC address of the peer P2P client
    990  * @wps_method: WPS method to be used in provisioning
    991  * @go_intent: Local GO intent value (1..15)
    992  * @own_interface_addr: Intended interface address to use with the group
    993  * @force_freq: The only allowed channel frequency in MHz or 0
    994  * @persistent_group: Whether to create a persistent group (0 = no, 1 =
    995  * persistent group without persistent reconnect, 2 = persistent group with
    996  * persistent reconnect)
    997  * @force_ssid: Forced SSID for the group if we become GO or %NULL to generate
    998  *	a new SSID
    999  * @force_ssid_len: Length of $force_ssid buffer
   1000  * @pd_before_go_neg: Whether to send Provision Discovery prior to GO
   1001  *	Negotiation as an interoperability workaround when initiating group
   1002  *	formation
   1003  * @pref_freq: Preferred operating frequency in MHz or 0 (this is only used if
   1004  *	force_freq == 0)
   1005  * Returns: 0 on success, -1 on failure
   1006  */
   1007 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
   1008 		enum p2p_wps_method wps_method,
   1009 		int go_intent, const u8 *own_interface_addr,
   1010 		unsigned int force_freq, int persistent_group,
   1011 		const u8 *force_ssid, size_t force_ssid_len,
   1012 		int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id);
   1013 
   1014 /**
   1015  * p2p_authorize - Authorize P2P group formation (GO negotiation)
   1016  * @p2p: P2P module context from p2p_init()
   1017  * @peer_addr: MAC address of the peer P2P client
   1018  * @wps_method: WPS method to be used in provisioning
   1019  * @go_intent: Local GO intent value (1..15)
   1020  * @own_interface_addr: Intended interface address to use with the group
   1021  * @force_freq: The only allowed channel frequency in MHz or 0
   1022  * @persistent_group: Whether to create a persistent group (0 = no, 1 =
   1023  * persistent group without persistent reconnect, 2 = persistent group with
   1024  * persistent reconnect)
   1025  * @force_ssid: Forced SSID for the group if we become GO or %NULL to generate
   1026  *	a new SSID
   1027  * @force_ssid_len: Length of $force_ssid buffer
   1028  * @pref_freq: Preferred operating frequency in MHz or 0 (this is only used if
   1029  *	force_freq == 0)
   1030  * Returns: 0 on success, -1 on failure
   1031  *
   1032  * This is like p2p_connect(), but the actual group negotiation is not
   1033  * initiated automatically, i.e., the other end is expected to do that.
   1034  */
   1035 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
   1036 		  enum p2p_wps_method wps_method,
   1037 		  int go_intent, const u8 *own_interface_addr,
   1038 		  unsigned int force_freq, int persistent_group,
   1039 		  const u8 *force_ssid, size_t force_ssid_len,
   1040 		  unsigned int pref_freq, u16 oob_pw_id);
   1041 
   1042 /**
   1043  * p2p_reject - Reject peer device (explicitly block connection attempts)
   1044  * @p2p: P2P module context from p2p_init()
   1045  * @peer_addr: MAC address of the peer P2P client
   1046  * Returns: 0 on success, -1 on failure
   1047  */
   1048 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr);
   1049 
   1050 /**
   1051  * p2p_prov_disc_req - Send Provision Discovery Request
   1052  * @p2p: P2P module context from p2p_init()
   1053  * @peer_addr: MAC address of the peer P2P client
   1054  * @config_methods: WPS Config Methods value (only one bit set)
   1055  * @join: Whether this is used by a client joining an active group
   1056  * @force_freq: Forced TX frequency for the frame (mainly for the join case)
   1057  * @user_initiated_pd: Flag to indicate if initiated by user or not
   1058  * Returns: 0 on success, -1 on failure
   1059  *
   1060  * This function can be used to request a discovered P2P peer to display a PIN
   1061  * (config_methods = WPS_CONFIG_DISPLAY) or be prepared to enter a PIN from us
   1062  * (config_methods = WPS_CONFIG_KEYPAD). The Provision Discovery Request frame
   1063  * is transmitted once immediately and if no response is received, the frame
   1064  * will be sent again whenever the target device is discovered during device
   1065  * dsicovery (start with a p2p_find() call). Response from the peer is
   1066  * indicated with the p2p_config::prov_disc_resp() callback.
   1067  */
   1068 int p2p_prov_disc_req(struct p2p_data *p2p, const u8 *peer_addr,
   1069 		      u16 config_methods, int join, int force_freq,
   1070 		      int user_initiated_pd);
   1071 
   1072 /**
   1073  * p2p_sd_request - Schedule a service discovery query
   1074  * @p2p: P2P module context from p2p_init()
   1075  * @dst: Destination peer or %NULL to apply for all peers
   1076  * @tlvs: P2P Service Query TLV(s)
   1077  * Returns: Reference to the query or %NULL on failure
   1078  *
   1079  * Response to the query is indicated with the p2p_config::sd_response()
   1080  * callback.
   1081  */
   1082 void * p2p_sd_request(struct p2p_data *p2p, const u8 *dst,
   1083 		      const struct wpabuf *tlvs);
   1084 
   1085 #ifdef CONFIG_WIFI_DISPLAY
   1086 void * p2p_sd_request_wfd(struct p2p_data *p2p, const u8 *dst,
   1087 			  const struct wpabuf *tlvs);
   1088 #endif /* CONFIG_WIFI_DISPLAY */
   1089 
   1090 /**
   1091  * p2p_sd_cancel_request - Cancel a pending service discovery query
   1092  * @p2p: P2P module context from p2p_init()
   1093  * @req: Query reference from p2p_sd_request()
   1094  * Returns: 0 if request for cancelled; -1 if not found
   1095  */
   1096 int p2p_sd_cancel_request(struct p2p_data *p2p, void *req);
   1097 
   1098 /**
   1099  * p2p_sd_response - Send response to a service discovery query
   1100  * @p2p: P2P module context from p2p_init()
   1101  * @freq: Frequency from p2p_config::sd_request() callback
   1102  * @dst: Destination address from p2p_config::sd_request() callback
   1103  * @dialog_token: Dialog token from p2p_config::sd_request() callback
   1104  * @resp_tlvs: P2P Service Response TLV(s)
   1105  *
   1106  * This function is called as a response to the request indicated with
   1107  * p2p_config::sd_request() callback.
   1108  */
   1109 void p2p_sd_response(struct p2p_data *p2p, int freq, const u8 *dst,
   1110 		     u8 dialog_token, const struct wpabuf *resp_tlvs);
   1111 
   1112 /**
   1113  * p2p_sd_service_update - Indicate a change in local services
   1114  * @p2p: P2P module context from p2p_init()
   1115  *
   1116  * This function needs to be called whenever there is a change in availability
   1117  * of the local services. This will increment the Service Update Indicator
   1118  * value which will be used in SD Request and Response frames.
   1119  */
   1120 void p2p_sd_service_update(struct p2p_data *p2p);
   1121 
   1122 
   1123 enum p2p_invite_role {
   1124 	P2P_INVITE_ROLE_GO,
   1125 	P2P_INVITE_ROLE_ACTIVE_GO,
   1126 	P2P_INVITE_ROLE_CLIENT
   1127 };
   1128 
   1129 /**
   1130  * p2p_invite - Invite a P2P Device into a group
   1131  * @p2p: P2P module context from p2p_init()
   1132  * @peer: Device Address of the peer P2P Device
   1133  * @role: Local role in the group
   1134  * @bssid: Group BSSID or %NULL if not known
   1135  * @ssid: Group SSID
   1136  * @ssid_len: Length of ssid in octets
   1137  * @force_freq: The only allowed channel frequency in MHz or 0
   1138  * @go_dev_addr: Forced GO Device Address or %NULL if none
   1139  * @persistent_group: Whether this is to reinvoke a persistent group
   1140  * @pref_freq: Preferred operating frequency in MHz or 0 (this is only used if
   1141  *	force_freq == 0)
   1142  * @dev_pw_id: Device Password ID from OOB Device Password (NFC) static handover
   1143  *	case or -1 if not used
   1144  * Returns: 0 on success, -1 on failure
   1145  */
   1146 int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role,
   1147 	       const u8 *bssid, const u8 *ssid, size_t ssid_len,
   1148 	       unsigned int force_freq, const u8 *go_dev_addr,
   1149 	       int persistent_group, unsigned int pref_freq, int dev_pw_id);
   1150 
   1151 /**
   1152  * p2p_presence_req - Request GO presence
   1153  * @p2p: P2P module context from p2p_init()
   1154  * @go_interface_addr: GO P2P Interface Address
   1155  * @own_interface_addr: Own P2P Interface Address for this group
   1156  * @freq: Group operating frequence (in MHz)
   1157  * @duration1: Preferred presence duration in microseconds
   1158  * @interval1: Preferred presence interval in microseconds
   1159  * @duration2: Acceptable presence duration in microseconds
   1160  * @interval2: Acceptable presence interval in microseconds
   1161  * Returns: 0 on success, -1 on failure
   1162  *
   1163  * If both duration and interval values are zero, the parameter pair is not
   1164  * specified (i.e., to remove Presence Request, use duration1 = interval1 = 0).
   1165  */
   1166 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
   1167 		     const u8 *own_interface_addr, unsigned int freq,
   1168 		     u32 duration1, u32 interval1, u32 duration2,
   1169 		     u32 interval2);
   1170 
   1171 /**
   1172  * p2p_ext_listen - Set Extended Listen Timing
   1173  * @p2p: P2P module context from p2p_init()
   1174  * @freq: Group operating frequence (in MHz)
   1175  * @period: Availability period in milliseconds (1-65535; 0 to disable)
   1176  * @interval: Availability interval in milliseconds (1-65535; 0 to disable)
   1177  * Returns: 0 on success, -1 on failure
   1178  *
   1179  * This function can be used to enable or disable (period = interval = 0)
   1180  * Extended Listen Timing. When enabled, the P2P Device will become
   1181  * discoverable (go into Listen State) every @interval milliseconds for at
   1182  * least @period milliseconds.
   1183  */
   1184 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
   1185 		   unsigned int interval);
   1186 
   1187 /* Event notifications from upper layer management operations */
   1188 
   1189 /**
   1190  * p2p_wps_success_cb - Report successfully completed WPS provisioning
   1191  * @p2p: P2P module context from p2p_init()
   1192  * @mac_addr: Peer address
   1193  *
   1194  * This function is used to report successfully completed WPS provisioning
   1195  * during group formation in both GO/Registrar and client/Enrollee roles.
   1196  */
   1197 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr);
   1198 
   1199 /**
   1200  * p2p_group_formation_failed - Report failed WPS provisioning
   1201  * @p2p: P2P module context from p2p_init()
   1202  *
   1203  * This function is used to report failed group formation. This can happen
   1204  * either due to failed WPS provisioning or due to 15 second timeout during
   1205  * the provisioning phase.
   1206  */
   1207 void p2p_group_formation_failed(struct p2p_data *p2p);
   1208 
   1209 /**
   1210  * p2p_get_provisioning_info - Get any stored provisioning info
   1211  * @p2p: P2P module context from p2p_init()
   1212  * @addr: Peer P2P Device Address
   1213  * Returns: WPS provisioning information (WPS config method) or 0 if no
   1214  * information is available
   1215  *
   1216  * This function is used to retrieve stored WPS provisioning info for the given
   1217  * peer.
   1218  */
   1219 u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr);
   1220 
   1221 /**
   1222  * p2p_clear_provisioning_info - Clear any stored provisioning info
   1223  * @p2p: P2P module context from p2p_init()
   1224  * @iface_addr: Peer P2P Device Address
   1225  *
   1226  * This function is used to clear stored WPS provisioning info for the given
   1227  * peer.
   1228  */
   1229 void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr);
   1230 
   1231 
   1232 /* Event notifications from lower layer driver operations */
   1233 
   1234 /**
   1235  * enum p2p_probe_req_status
   1236  *
   1237  * @P2P_PREQ_MALFORMED: frame was not well-formed
   1238  * @P2P_PREQ_NOT_LISTEN: device isn't in listen state, frame ignored
   1239  * @P2P_PREQ_NOT_P2P: frame was not a P2P probe request
   1240  * @P2P_PREQ_P2P_NOT_PROCESSED: frame was P2P but wasn't processed
   1241  * @P2P_PREQ_P2P_PROCESSED: frame has been processed by P2P
   1242  */
   1243 enum p2p_probe_req_status {
   1244 	P2P_PREQ_MALFORMED,
   1245 	P2P_PREQ_NOT_LISTEN,
   1246 	P2P_PREQ_NOT_P2P,
   1247 	P2P_PREQ_NOT_PROCESSED,
   1248 	P2P_PREQ_PROCESSED
   1249 };
   1250 
   1251 /**
   1252  * p2p_probe_req_rx - Report reception of a Probe Request frame
   1253  * @p2p: P2P module context from p2p_init()
   1254  * @addr: Source MAC address
   1255  * @dst: Destination MAC address if available or %NULL
   1256  * @bssid: BSSID if available or %NULL
   1257  * @ie: Information elements from the Probe Request frame body
   1258  * @ie_len: Length of ie buffer in octets
   1259  * Returns: value indicating the type and status of the probe request
   1260  */
   1261 enum p2p_probe_req_status
   1262 p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
   1263 		 const u8 *bssid, const u8 *ie, size_t ie_len);
   1264 
   1265 /**
   1266  * p2p_rx_action - Report received Action frame
   1267  * @p2p: P2P module context from p2p_init()
   1268  * @da: Destination address of the received Action frame
   1269  * @sa: Source address of the received Action frame
   1270  * @bssid: Address 3 of the received Action frame
   1271  * @category: Category of the received Action frame
   1272  * @data: Action frame body after the Category field
   1273  * @len: Length of the data buffer in octets
   1274  * @freq: Frequency (in MHz) on which the frame was received
   1275  */
   1276 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
   1277 		   const u8 *bssid, u8 category,
   1278 		   const u8 *data, size_t len, int freq);
   1279 
   1280 /**
   1281  * p2p_scan_res_handler - Indicate a P2P scan results
   1282  * @p2p: P2P module context from p2p_init()
   1283  * @bssid: BSSID of the scan result
   1284  * @freq: Frequency of the channel on which the device was found in MHz
   1285  * @rx_time: Time when the result was received
   1286  * @level: Signal level (signal strength of the received Beacon/Probe Response
   1287  *	frame)
   1288  * @ies: Pointer to IEs from the scan result
   1289  * @ies_len: Length of the ies buffer
   1290  * Returns: 0 to continue or 1 to stop scan result indication
   1291  *
   1292  * This function is called to indicate a scan result entry with P2P IE from a
   1293  * scan requested with struct p2p_config::p2p_scan(). This can be called during
   1294  * the actual scan process (i.e., whenever a new device is found) or as a
   1295  * sequence of calls after the full scan has been completed. The former option
   1296  * can result in optimized operations, but may not be supported by all
   1297  * driver/firmware designs. The ies buffer need to include at least the P2P IE,
   1298  * but it is recommended to include all IEs received from the device. The
   1299  * caller does not need to check that the IEs contain a P2P IE before calling
   1300  * this function since frames will be filtered internally if needed.
   1301  *
   1302  * This function will return 1 if it wants to stop scan result iteration (and
   1303  * scan in general if it is still in progress). This is used to allow faster
   1304  * start of a pending operation, e.g., to start a pending GO negotiation.
   1305  */
   1306 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
   1307 			 struct os_reltime *rx_time, int level, const u8 *ies,
   1308 			 size_t ies_len);
   1309 
   1310 /**
   1311  * p2p_scan_res_handled - Indicate end of scan results
   1312  * @p2p: P2P module context from p2p_init()
   1313  *
   1314  * This function is called to indicate that all P2P scan results from a scan
   1315  * have been reported with zero or more calls to p2p_scan_res_handler(). This
   1316  * function must be called as a response to successful
   1317  * struct p2p_config::p2p_scan() call if none of the p2p_scan_res_handler()
   1318  * calls stopped iteration.
   1319  */
   1320 void p2p_scan_res_handled(struct p2p_data *p2p);
   1321 
   1322 enum p2p_send_action_result {
   1323 	P2P_SEND_ACTION_SUCCESS /* Frame was send and acknowledged */,
   1324 	P2P_SEND_ACTION_NO_ACK /* Frame was sent, but not acknowledged */,
   1325 	P2P_SEND_ACTION_FAILED /* Frame was not sent due to a failure */
   1326 };
   1327 
   1328 /**
   1329  * p2p_send_action_cb - Notify TX status of an Action frame
   1330  * @p2p: P2P module context from p2p_init()
   1331  * @freq: Channel frequency in MHz
   1332  * @dst: Destination MAC address (Address 1)
   1333  * @src: Source MAC address (Address 2)
   1334  * @bssid: BSSID (Address 3)
   1335  * @result: Result of the transmission attempt
   1336  *
   1337  * This function is used to indicate the result of an Action frame transmission
   1338  * that was requested with struct p2p_config::send_action() callback.
   1339  */
   1340 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
   1341 			const u8 *src, const u8 *bssid,
   1342 			enum p2p_send_action_result result);
   1343 
   1344 /**
   1345  * p2p_listen_cb - Indicate the start of a requested Listen state
   1346  * @p2p: P2P module context from p2p_init()
   1347  * @freq: Listen channel frequency in MHz
   1348  * @duration: Duration for the Listen state in milliseconds
   1349  *
   1350  * This function is used to indicate that a Listen state requested with
   1351  * struct p2p_config::start_listen() callback has started.
   1352  */
   1353 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
   1354 		   unsigned int duration);
   1355 
   1356 /**
   1357  * p2p_listen_end - Indicate the end of a requested Listen state
   1358  * @p2p: P2P module context from p2p_init()
   1359  * @freq: Listen channel frequency in MHz
   1360  * Returns: 0 if no operations were started, 1 if an operation was started
   1361  *
   1362  * This function is used to indicate that a Listen state requested with
   1363  * struct p2p_config::start_listen() callback has ended.
   1364  */
   1365 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq);
   1366 
   1367 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
   1368 		      const u8 *ie, size_t ie_len);
   1369 
   1370 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
   1371 			const u8 *ie, size_t ie_len);
   1372 
   1373 
   1374 /* Per-group P2P state for GO */
   1375 
   1376 struct p2p_group;
   1377 
   1378 /**
   1379  * struct p2p_group_config - P2P group configuration
   1380  *
   1381  * This configuration is provided to the P2P module during initialization of
   1382  * the per-group information with p2p_group_init().
   1383  */
   1384 struct p2p_group_config {
   1385 	/**
   1386 	 * persistent_group - Whether the group is persistent
   1387 	 * 0 = not a persistent group
   1388 	 * 1 = persistent group without persistent reconnect
   1389 	 * 2 = persistent group with persistent reconnect
   1390 	 */
   1391 	int persistent_group;
   1392 
   1393 	/**
   1394 	 * interface_addr - P2P Interface Address of the group
   1395 	 */
   1396 	u8 interface_addr[ETH_ALEN];
   1397 
   1398 	/**
   1399 	 * max_clients - Maximum number of clients in the group
   1400 	 */
   1401 	unsigned int max_clients;
   1402 
   1403 	/**
   1404 	 * ssid - Group SSID
   1405 	 */
   1406 	u8 ssid[32];
   1407 
   1408 	/**
   1409 	 * ssid_len - Length of SSID
   1410 	 */
   1411 	size_t ssid_len;
   1412 
   1413 	/**
   1414 	 * freq - Operating channel of the group
   1415 	 */
   1416 	int freq;
   1417 
   1418 	/**
   1419 	 * cb_ctx - Context to use with callback functions
   1420 	 */
   1421 	void *cb_ctx;
   1422 
   1423 	/**
   1424 	 * ie_update - Notification of IE update
   1425 	 * @ctx: Callback context from cb_ctx
   1426 	 * @beacon_ies: P2P IE for Beacon frames or %NULL if no change
   1427 	 * @proberesp_ies: P2P Ie for Probe Response frames
   1428 	 *
   1429 	 * P2P module uses this callback function to notify whenever the P2P IE
   1430 	 * in Beacon or Probe Response frames should be updated based on group
   1431 	 * events.
   1432 	 *
   1433 	 * The callee is responsible for freeing the returned buffer(s) with
   1434 	 * wpabuf_free().
   1435 	 */
   1436 	void (*ie_update)(void *ctx, struct wpabuf *beacon_ies,
   1437 			  struct wpabuf *proberesp_ies);
   1438 
   1439 	/**
   1440 	 * idle_update - Notification of changes in group idle state
   1441 	 * @ctx: Callback context from cb_ctx
   1442 	 * @idle: Whether the group is idle (no associated stations)
   1443 	 */
   1444 	void (*idle_update)(void *ctx, int idle);
   1445 };
   1446 
   1447 /**
   1448  * p2p_group_init - Initialize P2P group
   1449  * @p2p: P2P module context from p2p_init()
   1450  * @config: P2P group configuration (will be freed by p2p_group_deinit())
   1451  * Returns: Pointer to private data or %NULL on failure
   1452  *
   1453  * This function is used to initialize per-group P2P module context. Currently,
   1454  * this is only used to manage GO functionality and P2P clients do not need to
   1455  * create an instance of this per-group information.
   1456  */
   1457 struct p2p_group * p2p_group_init(struct p2p_data *p2p,
   1458 				  struct p2p_group_config *config);
   1459 
   1460 /**
   1461  * p2p_group_deinit - Deinitialize P2P group
   1462  * @group: P2P group context from p2p_group_init()
   1463  */
   1464 void p2p_group_deinit(struct p2p_group *group);
   1465 
   1466 /**
   1467  * p2p_group_notif_assoc - Notification of P2P client association with GO
   1468  * @group: P2P group context from p2p_group_init()
   1469  * @addr: Interface address of the P2P client
   1470  * @ie: IEs from the (Re)association Request frame
   1471  * @len: Length of the ie buffer in octets
   1472  * Returns: 0 on success, -1 on failure
   1473  */
   1474 int p2p_group_notif_assoc(struct p2p_group *group, const u8 *addr,
   1475 			  const u8 *ie, size_t len);
   1476 
   1477 /**
   1478  * p2p_group_assoc_resp_ie - Build P2P IE for (re)association response
   1479  * @group: P2P group context from p2p_group_init()
   1480  * @status: Status value (P2P_SC_SUCCESS if association succeeded)
   1481  * Returns: P2P IE for (Re)association Response or %NULL on failure
   1482  *
   1483  * The caller is responsible for freeing the returned buffer with
   1484  * wpabuf_free().
   1485  */
   1486 struct wpabuf * p2p_group_assoc_resp_ie(struct p2p_group *group, u8 status);
   1487 
   1488 /**
   1489  * p2p_group_notif_disassoc - Notification of P2P client disassociation from GO
   1490  * @group: P2P group context from p2p_group_init()
   1491  * @addr: Interface address of the P2P client
   1492  */
   1493 void p2p_group_notif_disassoc(struct p2p_group *group, const u8 *addr);
   1494 
   1495 /**
   1496  * p2p_group_notif_formation_done - Notification of completed group formation
   1497  * @group: P2P group context from p2p_group_init()
   1498  */
   1499 void p2p_group_notif_formation_done(struct p2p_group *group);
   1500 
   1501 /**
   1502  * p2p_group_notif_noa - Notification of NoA change
   1503  * @group: P2P group context from p2p_group_init()
   1504  * @noa: Notice of Absence attribute payload, %NULL if none
   1505  * @noa_len: Length of noa buffer in octets
   1506  * Returns: 0 on success, -1 on failure
   1507  *
   1508  * Notify the P2P group management about a new NoA contents. This will be
   1509  * inserted into the P2P IEs in Beacon and Probe Response frames with rest of
   1510  * the group information.
   1511  */
   1512 int p2p_group_notif_noa(struct p2p_group *group, const u8 *noa,
   1513 			size_t noa_len);
   1514 
   1515 /**
   1516  * p2p_group_match_dev_type - Match device types in group with requested type
   1517  * @group: P2P group context from p2p_group_init()
   1518  * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
   1519  * Returns: 1 on match, 0 on mismatch
   1520  *
   1521  * This function can be used to match the Requested Device Type attribute in
   1522  * WPS IE with the device types of a group member for deciding whether a GO
   1523  * should reply to a Probe Request frame. Match will be reported if the WPS IE
   1524  * is not requested any specific device type.
   1525  */
   1526 int p2p_group_match_dev_type(struct p2p_group *group, struct wpabuf *wps);
   1527 
   1528 /**
   1529  * p2p_group_match_dev_id - Match P2P Device Address in group with requested device id
   1530  */
   1531 int p2p_group_match_dev_id(struct p2p_group *group, struct wpabuf *p2p);
   1532 
   1533 /**
   1534  * p2p_group_go_discover - Send GO Discoverability Request to a group client
   1535  * @group: P2P group context from p2p_group_init()
   1536  * Returns: 0 on success (frame scheduled); -1 if client was not found
   1537  */
   1538 int p2p_group_go_discover(struct p2p_group *group, const u8 *dev_id,
   1539 			  const u8 *searching_dev, int rx_freq);
   1540 
   1541 
   1542 /* Generic helper functions */
   1543 
   1544 /**
   1545  * p2p_ie_text - Build text format description of P2P IE
   1546  * @p2p_ie: P2P IE
   1547  * @buf: Buffer for returning text
   1548  * @end: Pointer to the end of the buf area
   1549  * Returns: Number of octets written to the buffer or -1 on failure
   1550  *
   1551  * This function can be used to parse P2P IE contents into text format
   1552  * field=value lines.
   1553  */
   1554 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end);
   1555 
   1556 /**
   1557  * p2p_scan_result_text - Build text format description of P2P IE
   1558  * @ies: Information elements from scan results
   1559  * @ies_len: ies buffer length in octets
   1560  * @buf: Buffer for returning text
   1561  * @end: Pointer to the end of the buf area
   1562  * Returns: Number of octets written to the buffer or -1 on failure
   1563  *
   1564  * This function can be used to parse P2P IE contents into text format
   1565  * field=value lines.
   1566  */
   1567 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end);
   1568 
   1569 /**
   1570  * p2p_parse_dev_addr_in_p2p_ie - Parse P2P Device Address from a concatenated
   1571  * P2P IE
   1572  * @p2p_ie: P2P IE
   1573  * @dev_addr: Buffer for returning P2P Device Address
   1574  * Returns: 0 on success or -1 if P2P Device Address could not be parsed
   1575  */
   1576 int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr);
   1577 
   1578 /**
   1579  * p2p_parse_dev_addr - Parse P2P Device Address from P2P IE(s)
   1580  * @ies: Information elements from scan results
   1581  * @ies_len: ies buffer length in octets
   1582  * @dev_addr: Buffer for returning P2P Device Address
   1583  * Returns: 0 on success or -1 if P2P Device Address could not be parsed
   1584  */
   1585 int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr);
   1586 
   1587 /**
   1588  * p2p_assoc_req_ie - Build P2P IE for (Re)Association Request frame
   1589  * @p2p: P2P module context from p2p_init()
   1590  * @bssid: BSSID
   1591  * @buf: Buffer for writing the P2P IE
   1592  * @len: Maximum buf length in octets
   1593  * @p2p_group: Whether this is for association with a P2P GO
   1594  * @p2p_ie: Reassembled P2P IE data from scan results or %NULL if none
   1595  * Returns: Number of octets written into buf or -1 on failure
   1596  */
   1597 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
   1598 		     size_t len, int p2p_group, struct wpabuf *p2p_ie);
   1599 
   1600 /**
   1601  * p2p_scan_ie - Build P2P IE for Probe Request
   1602  * @p2p: P2P module context from p2p_init()
   1603  * @ies: Buffer for writing P2P IE
   1604  * @dev_id: Device ID to search for or %NULL for any
   1605  */
   1606 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id);
   1607 
   1608 /**
   1609  * p2p_scan_ie_buf_len - Get maximum buffer length needed for p2p_scan_ie
   1610  * @p2p: P2P module context from p2p_init()
   1611  * Returns: Number of octets that p2p_scan_ie() may add to the buffer
   1612  */
   1613 size_t p2p_scan_ie_buf_len(struct p2p_data *p2p);
   1614 
   1615 /**
   1616  * p2p_go_params - Generate random P2P group parameters
   1617  * @p2p: P2P module context from p2p_init()
   1618  * @params: Buffer for parameters
   1619  * Returns: 0 on success, -1 on failure
   1620  */
   1621 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params);
   1622 
   1623 /**
   1624  * p2p_get_group_capab - Get Group Capability from P2P IE data
   1625  * @p2p_ie: P2P IE(s) contents
   1626  * Returns: Group Capability
   1627  */
   1628 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie);
   1629 
   1630 /**
   1631  * p2p_get_cross_connect_disallowed - Does WLAN AP disallows cross connection
   1632  * @p2p_ie: P2P IE(s) contents
   1633  * Returns: 0 if cross connection is allow, 1 if not
   1634  */
   1635 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie);
   1636 
   1637 /**
   1638  * p2p_get_go_dev_addr - Get P2P Device Address from P2P IE data
   1639  * @p2p_ie: P2P IE(s) contents
   1640  * Returns: Pointer to P2P Device Address or %NULL if not included
   1641  */
   1642 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie);
   1643 
   1644 /**
   1645  * p2p_get_peer_info - Get P2P peer information
   1646  * @p2p: P2P module context from p2p_init()
   1647  * @addr: P2P Device Address of the peer or %NULL to indicate the first peer
   1648  * @next: Whether to select the peer entry following the one indicated by addr
   1649  * Returns: Pointer to peer info or %NULL if not found
   1650  */
   1651 const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
   1652 					       const u8 *addr, int next);
   1653 
   1654 /**
   1655  * p2p_get_peer_info_txt - Get internal P2P peer information in text format
   1656  * @info: Pointer to P2P peer info from p2p_get_peer_info()
   1657  * @buf: Buffer for returning text
   1658  * @buflen: Maximum buffer length
   1659  * Returns: Number of octets written to the buffer or -1 on failure
   1660  *
   1661  * Note: This information is internal to the P2P module and subject to change.
   1662  * As such, this should not really be used by external programs for purposes
   1663  * other than debugging.
   1664  */
   1665 int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
   1666 			  char *buf, size_t buflen);
   1667 
   1668 /**
   1669  * p2p_peer_known - Check whether P2P peer is known
   1670  * @p2p: P2P module context from p2p_init()
   1671  * @addr: P2P Device Address of the peer
   1672  * Returns: 1 if the specified device is in the P2P peer table or 0 if not
   1673  */
   1674 int p2p_peer_known(struct p2p_data *p2p, const u8 *addr);
   1675 
   1676 /**
   1677  * p2p_set_client_discoverability - Set client discoverability capability
   1678  * @p2p: P2P module context from p2p_init()
   1679  * @enabled: Whether client discoverability will be enabled
   1680  *
   1681  * This function can be used to disable (and re-enable) client discoverability.
   1682  * This capability is enabled by default and should not be disabled in normal
   1683  * use cases, i.e., this is mainly for testing purposes.
   1684  */
   1685 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled);
   1686 
   1687 /**
   1688  * p2p_set_managed_oper - Set managed P2P Device operations capability
   1689  * @p2p: P2P module context from p2p_init()
   1690  * @enabled: Whether managed P2P Device operations will be enabled
   1691  */
   1692 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled);
   1693 
   1694 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
   1695 			   u8 forced);
   1696 
   1697 u8 p2p_get_listen_channel(struct p2p_data *p2p);
   1698 
   1699 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len);
   1700 
   1701 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
   1702 			   u8 *iface_addr);
   1703 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
   1704 			   u8 *dev_addr);
   1705 
   1706 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr);
   1707 
   1708 /**
   1709  * p2p_set_cross_connect - Set cross connection capability
   1710  * @p2p: P2P module context from p2p_init()
   1711  * @enabled: Whether cross connection will be enabled
   1712  */
   1713 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled);
   1714 
   1715 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr);
   1716 
   1717 /**
   1718  * p2p_set_intra_bss_dist - Set intra BSS distribution
   1719  * @p2p: P2P module context from p2p_init()
   1720  * @enabled: Whether intra BSS distribution will be enabled
   1721  */
   1722 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled);
   1723 
   1724 int p2p_channels_includes_freq(const struct p2p_channels *channels,
   1725 			       unsigned int freq);
   1726 
   1727 /**
   1728  * p2p_supported_freq - Check whether channel is supported for P2P
   1729  * @p2p: P2P module context from p2p_init()
   1730  * @freq: Channel frequency in MHz
   1731  * Returns: 0 if channel not usable for P2P, 1 if usable for P2P
   1732  */
   1733 int p2p_supported_freq(struct p2p_data *p2p, unsigned int freq);
   1734 
   1735 /**
   1736  * p2p_supported_freq_go - Check whether channel is supported for P2P GO operation
   1737  * @p2p: P2P module context from p2p_init()
   1738  * @freq: Channel frequency in MHz
   1739  * Returns: 0 if channel not usable for P2P, 1 if usable for P2P
   1740  */
   1741 int p2p_supported_freq_go(struct p2p_data *p2p, unsigned int freq);
   1742 
   1743 /**
   1744  * p2p_supported_freq_cli - Check whether channel is supported for P2P client operation
   1745  * @p2p: P2P module context from p2p_init()
   1746  * @freq: Channel frequency in MHz
   1747  * Returns: 0 if channel not usable for P2P, 1 if usable for P2P
   1748  */
   1749 int p2p_supported_freq_cli(struct p2p_data *p2p, unsigned int freq);
   1750 
   1751 /**
   1752  * p2p_get_pref_freq - Get channel from preferred channel list
   1753  * @p2p: P2P module context from p2p_init()
   1754  * @channels: List of channels
   1755  * Returns: Preferred channel
   1756  */
   1757 unsigned int p2p_get_pref_freq(struct p2p_data *p2p,
   1758 			       const struct p2p_channels *channels);
   1759 
   1760 void p2p_update_channel_list(struct p2p_data *p2p,
   1761 			     const struct p2p_channels *chan,
   1762 			     const struct p2p_channels *cli_chan);
   1763 
   1764 /**
   1765  * p2p_set_best_channels - Update best channel information
   1766  * @p2p: P2P module context from p2p_init()
   1767  * @freq_24: Frequency (MHz) of best channel in 2.4 GHz band
   1768  * @freq_5: Frequency (MHz) of best channel in 5 GHz band
   1769  * @freq_overall: Frequency (MHz) of best channel overall
   1770  */
   1771 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
   1772 			   int freq_overall);
   1773 
   1774 /**
   1775  * p2p_set_own_freq_preference - Set own preference for channel
   1776  * @p2p: P2P module context from p2p_init()
   1777  * @freq: Frequency (MHz) of the preferred channel or 0 if no preference
   1778  *
   1779  * This function can be used to set a preference on the operating channel based
   1780  * on frequencies used on the other virtual interfaces that share the same
   1781  * radio. If non-zero, this is used to try to avoid multi-channel concurrency.
   1782  */
   1783 void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq);
   1784 
   1785 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p);
   1786 
   1787 /**
   1788  * p2p_get_group_num_members - Get number of members in group
   1789  * @group: P2P group context from p2p_group_init()
   1790  * Returns: Number of members in the group
   1791  */
   1792 unsigned int p2p_get_group_num_members(struct p2p_group *group);
   1793 
   1794 /**
   1795  * p2p_iterate_group_members - Iterate group members
   1796  * @group: P2P group context from p2p_group_init()
   1797  * @next: iteration pointer, must be a pointer to a void * that is set to %NULL
   1798  *	on the first call and not modified later
   1799  * Returns: A P2P Device Address for each call and %NULL for no more members
   1800  */
   1801 const u8 * p2p_iterate_group_members(struct p2p_group *group, void **next);
   1802 
   1803 /**
   1804  * p2p_group_get_dev_addr - Get a P2P Device Address of a client in a group
   1805  * @group: P2P group context from p2p_group_init()
   1806  * @addr: P2P Interface Address of the client
   1807  * Returns: P2P Device Address of the client if found or %NULL if no match
   1808  * found
   1809  */
   1810 const u8 * p2p_group_get_dev_addr(struct p2p_group *group, const u8 *addr);
   1811 
   1812 /**
   1813  * p2p_group_is_client_connected - Check whether a specific client is connected
   1814  * @group: P2P group context from p2p_group_init()
   1815  * @addr: P2P Device Address of the client
   1816  * Returns: 1 if client is connected or 0 if not
   1817  */
   1818 int p2p_group_is_client_connected(struct p2p_group *group, const u8 *dev_addr);
   1819 
   1820 /**
   1821  * p2p_group_get_config - Get the group configuration
   1822  * @group: P2P group context from p2p_group_init()
   1823  * Returns: The group configuration pointer
   1824  */
   1825 const struct p2p_group_config * p2p_group_get_config(struct p2p_group *group);
   1826 
   1827 /**
   1828  * p2p_loop_on_all_groups - Run the given callback on all groups
   1829  * @p2p: P2P module context from p2p_init()
   1830  * @group_callback: The callback function pointer
   1831  * @user_data: Some user data pointer which can be %NULL
   1832  *
   1833  * The group_callback function can stop the iteration by returning 0.
   1834  */
   1835 void p2p_loop_on_all_groups(struct p2p_data *p2p,
   1836 			    int (*group_callback)(struct p2p_group *group,
   1837 						  void *user_data),
   1838 			    void *user_data);
   1839 
   1840 /**
   1841  * p2p_get_peer_found - Get P2P peer info structure of a found peer
   1842  * @p2p: P2P module context from p2p_init()
   1843  * @addr: P2P Device Address of the peer or %NULL to indicate the first peer
   1844  * @next: Whether to select the peer entry following the one indicated by addr
   1845  * Returns: The first P2P peer info available or %NULL if no such peer exists
   1846  */
   1847 const struct p2p_peer_info *
   1848 p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next);
   1849 
   1850 /**
   1851  * p2p_remove_wps_vendor_extensions - Remove WPS vendor extensions
   1852  * @p2p: P2P module context from p2p_init()
   1853  */
   1854 void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p);
   1855 
   1856 /**
   1857  * p2p_add_wps_vendor_extension - Add a WPS vendor extension
   1858  * @p2p: P2P module context from p2p_init()
   1859  * @vendor_ext: The vendor extensions to add
   1860  * Returns: 0 on success, -1 on failure
   1861  *
   1862  * The wpabuf structures in the array are owned by the P2P
   1863  * module after this call.
   1864  */
   1865 int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
   1866 				 const struct wpabuf *vendor_ext);
   1867 
   1868 /**
   1869  * p2p_set_oper_channel - Set the P2P operating channel
   1870  * @p2p: P2P module context from p2p_init()
   1871  * @op_reg_class: Operating regulatory class to set
   1872  * @op_channel: operating channel to set
   1873  * @cfg_op_channel : Whether op_channel is hardcoded in configuration
   1874  * Returns: 0 on success, -1 on failure
   1875  */
   1876 int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
   1877 			 int cfg_op_channel);
   1878 
   1879 /**
   1880  * p2p_set_pref_chan - Set P2P preferred channel list
   1881  * @p2p: P2P module context from p2p_init()
   1882  * @num_pref_chan: Number of entries in pref_chan list
   1883  * @pref_chan: Preferred channels or %NULL to remove preferences
   1884  * Returns: 0 on success, -1 on failure
   1885  */
   1886 int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
   1887 		      const struct p2p_channel *pref_chan);
   1888 
   1889 /**
   1890  * p2p_set_no_go_freq - Set no GO channel ranges
   1891  * @p2p: P2P module context from p2p_init()
   1892  * @list: Channel ranges or %NULL to remove restriction
   1893  * Returns: 0 on success, -1 on failure
   1894  */
   1895 int p2p_set_no_go_freq(struct p2p_data *p2p,
   1896 		       const struct wpa_freq_range_list *list);
   1897 
   1898 /**
   1899  * p2p_in_progress - Check whether a P2P operation is progress
   1900  * @p2p: P2P module context from p2p_init()
   1901  * Returns: 0 if P2P module is idle or 1 if an operation is in progress
   1902  */
   1903 int p2p_in_progress(struct p2p_data *p2p);
   1904 
   1905 const char * p2p_wps_method_text(enum p2p_wps_method method);
   1906 
   1907 /**
   1908  * p2p_set_config_timeout - Set local config timeouts
   1909  * @p2p: P2P module context from p2p_init()
   1910  * @go_timeout: Time in 10 ms units it takes to start the GO mode
   1911  * @client_timeout: Time in 10 ms units it takes to start the client mode
   1912  */
   1913 void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
   1914 			    u8 client_timeout);
   1915 
   1916 int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie);
   1917 int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie);
   1918 int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie);
   1919 int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie);
   1920 int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie);
   1921 int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie);
   1922 int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie);
   1923 int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie);
   1924 int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem);
   1925 int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem);
   1926 int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
   1927 				  const struct wpabuf *elem);
   1928 struct wpabuf * wifi_display_encaps(struct wpabuf *subelems);
   1929 
   1930 /**
   1931  * p2p_set_disc_int - Set min/max discoverable interval for p2p_find
   1932  * @p2p: P2P module context from p2p_init()
   1933  * @min_disc_int: minDiscoverableInterval (in units of 100 TU); default 1
   1934  * @max_disc_int: maxDiscoverableInterval (in units of 100 TU); default 3
   1935  * @max_disc_tu: Maximum number of TUs (1.024 ms) for discoverable interval; or
   1936  *	-1 not to limit
   1937  * Returns: 0 on success, or -1 on failure
   1938  *
   1939  * This function can be used to configure minDiscoverableInterval and
   1940  * maxDiscoverableInterval parameters for the Listen state during device
   1941  * discovery (p2p_find). A random number of 100 TU units is picked for each
   1942  * Listen state iteration from [min_disc_int,max_disc_int] range.
   1943  *
   1944  * max_disc_tu can be used to futher limit the discoverable duration. However,
   1945  * it should be noted that use of this parameter is not recommended since it
   1946  * would not be compliant with the P2P specification.
   1947  */
   1948 int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
   1949 		     int max_disc_tu);
   1950 
   1951 /**
   1952  * p2p_get_state_txt - Get current P2P state for debug purposes
   1953  * @p2p: P2P module context from p2p_init()
   1954  * Returns: Name of the current P2P module state
   1955  *
   1956  * It should be noted that the P2P module state names are internal information
   1957  * and subject to change at any point, i.e., this information should be used
   1958  * mainly for debugging purposes.
   1959  */
   1960 const char * p2p_get_state_txt(struct p2p_data *p2p);
   1961 
   1962 struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
   1963 					   int client_freq,
   1964 					   const u8 *go_dev_addr,
   1965 					   const u8 *ssid, size_t ssid_len);
   1966 struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
   1967 					   int client_freq,
   1968 					   const u8 *go_dev_addr,
   1969 					   const u8 *ssid, size_t ssid_len);
   1970 
   1971 struct p2p_nfc_params {
   1972 	int sel;
   1973 	const u8 *wsc_attr;
   1974 	size_t wsc_len;
   1975 	const u8 *p2p_attr;
   1976 	size_t p2p_len;
   1977 
   1978 	enum {
   1979 		NO_ACTION, JOIN_GROUP, AUTH_JOIN, INIT_GO_NEG, RESP_GO_NEG,
   1980 		BOTH_GO, PEER_CLIENT
   1981 	} next_step;
   1982 	struct p2p_peer_info *peer;
   1983 	u8 oob_dev_pw[WPS_OOB_PUBKEY_HASH_LEN + 2 +
   1984 		      WPS_OOB_DEVICE_PASSWORD_LEN];
   1985 	size_t oob_dev_pw_len;
   1986 	int go_freq;
   1987 	u8 go_dev_addr[ETH_ALEN];
   1988 	u8 go_ssid[32];
   1989 	size_t go_ssid_len;
   1990 };
   1991 
   1992 int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
   1993 					struct p2p_nfc_params *params);
   1994 
   1995 void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
   1996 				      int go_intent,
   1997 				      const u8 *own_interface_addr);
   1998 
   1999 int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len);
   2000 
   2001 void p2p_loop_on_known_peers(struct p2p_data *p2p,
   2002 			     void (*peer_callback)(struct p2p_peer_info *peer,
   2003 						   void *user_data),
   2004 			     void *user_data);
   2005 
   2006 void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem);
   2007 
   2008 #endif /* P2P_H */
   2009