2 * Wi-Fi Direct - P2P module
3 * Copyright (c) 2009-2010, Atheros Communications
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
19 * P2P_MAX_REG_CLASSES - Maximum number of regulatory classes
21 #define P2P_MAX_REG_CLASSES 10
24 * P2P_MAX_REG_CLASS_CHANNELS - Maximum number of channels per regulatory class
26 #define P2P_MAX_REG_CLASS_CHANNELS 20
29 * struct p2p_channels - List of supported channels
33 * struct p2p_reg_class - Supported regulatory class
35 struct p2p_reg_class {
37 * reg_class - Regulatory class (IEEE 802.11-2007, Annex J)
42 * channel - Supported channels
44 u8 channel[P2P_MAX_REG_CLASS_CHANNELS];
47 * channels - Number of channel entries in use
50 } reg_class[P2P_MAX_REG_CLASSES];
53 * reg_classes - Number of reg_class entries in use
59 WPS_NOT_READY, WPS_PIN_LABEL, WPS_PIN_DISPLAY, WPS_PIN_KEYPAD, WPS_PBC
63 * struct p2p_go_neg_results - P2P Group Owner Negotiation results
65 struct p2p_go_neg_results {
67 * status - Negotiation result (Status Code)
69 * 0 (P2P_SC_SUCCESS) indicates success. Non-zero values indicate
75 * role_go - Whether local end is Group Owner
80 * freq - Frequency of the group operational channel in MHz
85 * ssid - SSID of the group
90 * ssid_len - Length of SSID in octets
95 * passphrase - WPA2-Personal passphrase for the group (GO only)
100 * peer_device_addr - P2P Device Address of the peer
102 u8 peer_device_addr[ETH_ALEN];
105 * peer_interface_addr - P2P Interface Address of the peer
107 u8 peer_interface_addr[ETH_ALEN];
110 * wps_method - WPS method to be used during provisioning
112 enum p2p_wps_method wps_method;
114 #define P2P_MAX_CHANNELS 50
117 * freq_list - Zero-terminated list of possible operational channels
119 int freq_list[P2P_MAX_CHANNELS];
122 * persistent_group - Whether the group should be made persistent
124 int persistent_group;
127 * peer_config_timeout - Peer configuration timeout (in 10 msec units)
129 unsigned int peer_config_timeout;
138 P2P_SCAN_SOCIAL_PLUS_ONE
142 * struct p2p_config - P2P configuration
144 * This configuration is provided to the P2P module during initialization with
149 * country - Country code to use in P2P operations
154 * reg_class - Regulatory class for own listen channel
159 * channel - Own listen channel
164 * Regulatory class for own operational channel
169 * op_channel - Own operational channel
174 * cfg_op_channel - Whether op_channel is hardcoded in configuration
179 * channels - Own supported regulatory classes and channels
181 * List of supposerted channels per regulatory class. The regulatory
182 * classes are defined in IEEE Std 802.11-2007 Annex J and the
183 * numbering of the clases depends on the configured country code.
185 struct p2p_channels channels;
188 * pri_dev_type - Primary Device Type (see WPS)
193 * P2P_SEC_DEVICE_TYPES - Maximum number of secondary device types
195 #define P2P_SEC_DEVICE_TYPES 5
198 * sec_dev_type - Optional secondary device types
200 u8 sec_dev_type[P2P_SEC_DEVICE_TYPES][8];
203 * dev_addr - P2P Device Address
205 u8 dev_addr[ETH_ALEN];
208 * dev_name - Device Name
213 * num_sec_dev_types - Number of sec_dev_type entries
215 size_t num_sec_dev_types;
218 * concurrent_operations - Whether concurrent operations are supported
220 int concurrent_operations;
223 * max_peers - Maximum number of discovered peers to remember
225 * If more peers are discovered, older entries will be removed to make
226 * room for the new ones.
231 * p2p_intra_bss - Intra BSS communication is supported
236 * ssid_postfix - Postfix data to add to the SSID
238 * This data will be added to the end of the SSID after the
239 * DIRECT-<random two octets> prefix.
241 u8 ssid_postfix[32 - 9];
244 * ssid_postfix_len - Length of the ssid_postfix data
246 size_t ssid_postfix_len;
249 * msg_ctx - Context to use with wpa_msg() calls
254 * cb_ctx - Context to use with callback functions
259 /* Callbacks to request lower layer driver operations */
262 * p2p_scan - Request a P2P scan/search
263 * @ctx: Callback context from cb_ctx
265 * @freq: Specific frequency (MHz) to scan or 0 for no restriction
266 * Returns: 0 on success, -1 on failure
268 * This callback function is used to request a P2P scan or search
269 * operation to be completed. Type type argument specifies which type
270 * of scan is to be done. @P2P_SCAN_SOCIAL indicates that only the
271 * social channels (1, 6, 11) should be scanned. @P2P_SCAN_FULL
272 * indicates that all channels are to be scanned. @P2P_SCAN_SPECIFIC
273 * request a scan of a single channel specified by freq.
274 * @P2P_SCAN_SOCIAL_PLUS_ONE request scan of all the social channels
275 * plus one extra channel specified by freq.
277 * The full scan is used for the initial scan to find group owners from
278 * all. The other types are used during search phase scan of the social
279 * channels (with potential variation if the Listen channel of the
280 * target peer is known or if other channels are scanned in steps).
282 * The scan results are returned after this call by calling
283 * p2p_scan_res_handler() for each scan result that has a P2P IE and
284 * then calling p2p_scan_res_handled() to indicate that all scan
285 * results have been indicated.
287 int (*p2p_scan)(void *ctx, enum p2p_scan_type type, int freq);
290 * send_probe_resp - Transmit a Probe Response frame
291 * @ctx: Callback context from cb_ctx
292 * @buf: Probe Response frame (including the header and body)
293 * Returns: 0 on success, -1 on failure
295 * This function is used to reply to Probe Request frames that were
296 * indicated with a call to p2p_probe_req_rx(). The response is to be
297 * sent on the same channel or to be dropped if the driver is not
298 * anymore listening to Probe Request frames.
300 * Alternatively, the responsibility for building the Probe Response
301 * frames in Listen state may be in another system component in which
302 * case this function need to be implemented (i.e., the function
303 * pointer can be %NULL). The WPS and P2P IEs to be added for Probe
304 * Response frames in such a case are available from the
305 * start_listen() callback. It should be noted that the received Probe
306 * Request frames must be indicated by calling p2p_probe_req_rx() even
307 * if this send_probe_resp() is not used.
309 int (*send_probe_resp)(void *ctx, const struct wpabuf *buf);
312 * send_action - Transmit an Action frame
313 * @ctx: Callback context from cb_ctx
314 * @freq: Frequency in MHz for the channel on which to transmit
315 * @dst: Destination MAC address (Address 1)
316 * @src: Source MAC address (Address 2)
317 * @bssid: BSSID (Address 3)
318 * @buf: Frame body (starting from Category field)
319 * @len: Length of buf in octets
320 * @wait_time: How many msec to wait for a response frame
321 * Returns: 0 on success, -1 on failure
323 * The Action frame may not be transmitted immediately and the status
324 * of the transmission must be reported by calling
325 * p2p_send_action_cb() once the frame has either been transmitted or
326 * it has been dropped due to excessive retries or other failure to
329 int (*send_action)(void *ctx, unsigned int freq, const u8 *dst,
330 const u8 *src, const u8 *bssid, const u8 *buf,
331 size_t len, unsigned int wait_time);
334 * send_action_done - Notify that Action frame sequence was completed
335 * @ctx: Callback context from cb_ctx
337 * This function is called when the Action frame sequence that was
338 * started with send_action() has been completed, i.e., when there is
339 * no need to wait for a response from the destination peer anymore.
341 void (*send_action_done)(void *ctx);
344 * start_listen - Start Listen state
345 * @ctx: Callback context from cb_ctx
346 * @freq: Frequency of the listen channel in MHz
347 * @duration: Duration for the Listen state in milliseconds
348 * @probe_resp_ie: IE(s) to be added to Probe Response frames
349 * Returns: 0 on success, -1 on failure
351 * This Listen state may not start immediately since the driver may
352 * have other pending operations to complete first. Once the Listen
353 * state has started, p2p_listen_cb() must be called to notify the P2P
354 * module. Once the Listen state is stopped, p2p_listen_end() must be
355 * called to notify the P2P module that the driver is not in the Listen
358 * If the send_probe_resp() is not used for generating the response,
359 * the IEs from probe_resp_ie need to be added to the end of the Probe
360 * Response frame body. If send_probe_resp() is used, the probe_resp_ie
361 * information can be ignored.
363 int (*start_listen)(void *ctx, unsigned int freq,
364 unsigned int duration,
365 const struct wpabuf *probe_resp_ie);
367 * stop_listen - Stop Listen state
368 * @ctx: Callback context from cb_ctx
370 * This callback can be used to stop a Listen state operation that was
371 * previously requested with start_listen().
373 void (*stop_listen)(void *ctx);
376 * get_noa - Get current Notice of Absence attribute payload
377 * @ctx: Callback context from cb_ctx
378 * @interface_addr: P2P Interface Address of the GO
379 * @buf: Buffer for returning NoA
380 * @buf_len: Buffer length in octets
381 * Returns: Number of octets used in buf, 0 to indicate no NoA is being
382 * advertized, or -1 on failure
384 * This function is used to fetch the current Notice of Absence
385 * attribute value from GO.
387 int (*get_noa)(void *ctx, const u8 *interface_addr, u8 *buf,
390 /* Callbacks to notify events to upper layer management entity */
393 * dev_found - Notification of a found P2P Device
394 * @ctx: Callback context from cb_ctx
395 * @addr: Source address of the message triggering this notification
396 * @dev_addr: P2P Device Address of the found P2P Device
397 * @pri_dev_type: Primary Device Type
398 * @dev_name: Device Name
399 * @config_methods: Configuration Methods
400 * @dev_capab: Device Capabilities
401 * @group_capab: Group Capabilities
403 * This callback is used to notify that a new P2P Device has been
404 * found. This may happen, e.g., during Search state based on scan
405 * results or during Listen state based on receive Probe Request and
406 * Group Owner Negotiation Request.
408 void (*dev_found)(void *ctx, const u8 *addr, const u8 *dev_addr,
409 const u8 *pri_dev_type, const char *dev_name,
410 u16 config_methods, u8 dev_capab, u8 group_capab);
413 * go_neg_req_rx - Notification of a receive GO Negotiation Request
414 * @ctx: Callback context from cb_ctx
415 * @src: Source address of the message triggering this notification
416 * @dev_passwd_id: WPS Device Password ID
418 * This callback is used to notify that a P2P Device is requesting
419 * group owner negotiation with us, but we do not have all the
420 * necessary information to start GO Negotiation. This indicates that
421 * the local user has not authorized the connection yet by providing a
422 * PIN or PBC button press. This information can be provided with a
423 * call to p2p_connect().
425 void (*go_neg_req_rx)(void *ctx, const u8 *src, u16 dev_passwd_id);
428 * go_neg_completed - Notification of GO Negotiation results
429 * @ctx: Callback context from cb_ctx
430 * @res: GO Negotiation results
432 * This callback is used to notify that Group Owner Negotiation has
433 * been completed. Non-zero struct p2p_go_neg_results::status indicates
434 * failed negotiation. In case of success, this function is responsible
435 * for creating a new group interface (or using the existing interface
436 * depending on driver features), setting up the group interface in
437 * proper mode based on struct p2p_go_neg_results::role_go and
438 * initializing WPS provisioning either as a Registrar (if GO) or as an
439 * Enrollee. Successful WPS provisioning must be indicated by calling
440 * p2p_wps_success_cb(). The callee is responsible for timing out group
441 * formation if WPS provisioning cannot be completed successfully
444 void (*go_neg_completed)(void *ctx, struct p2p_go_neg_results *res);
447 * sd_request - Callback on Service Discovery Request
448 * @ctx: Callback context from cb_ctx
449 * @freq: Frequency (in MHz) of the channel
450 * @sa: Source address of the request
451 * @dialog_token: Dialog token
452 * @update_indic: Service Update Indicator from the source of request
453 * @tlvs: P2P Service Request TLV(s)
454 * @tlvs_len: Length of tlvs buffer in octets
456 * This callback is used to indicate reception of a service discovery
457 * request. Response to the query must be indicated by calling
458 * p2p_sd_response() with the context information from the arguments to
459 * this callback function.
461 * This callback handler can be set to %NULL to indicate that service
462 * discovery is not supported.
464 void (*sd_request)(void *ctx, int freq, const u8 *sa, u8 dialog_token,
465 u16 update_indic, const u8 *tlvs, size_t tlvs_len);
468 * sd_response - Callback on Service Discovery Response
469 * @ctx: Callback context from cb_ctx
470 * @sa: Source address of the request
471 * @update_indic: Service Update Indicator from the source of response
472 * @tlvs: P2P Service Response TLV(s)
473 * @tlvs_len: Length of tlvs buffer in octets
475 * This callback is used to indicate reception of a service discovery
476 * response. This callback handler can be set to %NULL if no service
477 * discovery requests are used. The information provided with this call
478 * is replies to the queries scheduled with p2p_sd_request().
480 void (*sd_response)(void *ctx, const u8 *sa, u16 update_indic,
481 const u8 *tlvs, size_t tlvs_len);
484 * prov_disc_req - Callback on Provisiong Discovery Request
485 * @ctx: Callback context from cb_ctx
486 * @peer: Source address of the request
487 * @config_methods: Requested WPS Config Method
488 * @dev_addr: P2P Device Address of the found P2P Device
489 * @pri_dev_type: Primary Device Type
490 * @dev_name: Device Name
491 * @supp_config_methods: Supported configuration Methods
492 * @dev_capab: Device Capabilities
493 * @group_capab: Group Capabilities
495 * This callback is used to indicate reception of a Provision Discovery
496 * Request frame that the P2P module accepted.
498 void (*prov_disc_req)(void *ctx, const u8 *peer, u16 config_methods,
499 const u8 *dev_addr, const u8 *pri_dev_type,
500 const char *dev_name, u16 supp_config_methods,
501 u8 dev_capab, u8 group_capab);
504 * prov_disc_resp - Callback on Provisiong Discovery Response
505 * @ctx: Callback context from cb_ctx
506 * @peer: Source address of the response
507 * @config_methods: Value from p2p_prov_disc_req() or 0 on failure
509 * This callback is used to indicate reception of a Provision Discovery
510 * Response frame for a pending request scheduled with
511 * p2p_prov_disc_req(). This callback handler can be set to %NULL if
512 * provision discovery is not used.
514 void (*prov_disc_resp)(void *ctx, const u8 *peer, u16 config_methods);
517 * invitation_process - Optional callback for processing Invitations
518 * @ctx: Callback context from cb_ctx
519 * @sa: Source address of the Invitation Request
520 * @bssid: P2P Group BSSID from the request or %NULL if not included
521 * @go_dev_addr: GO Device Address from P2P Group ID
522 * @ssid: SSID from P2P Group ID
523 * @ssid_len: Length of ssid buffer in octets
524 * @go: Variable for returning whether the local end is GO in the group
525 * @group_bssid: Buffer for returning P2P Group BSSID (if local end GO)
526 * @force_freq: Variable for returning forced frequency for the group
527 * @persistent_group: Whether this is an invitation to reinvoke a
528 * persistent group (instead of invitation to join an active
530 * Returns: Status code (P2P_SC_*)
532 * This optional callback can be used to implement persistent reconnect
533 * by allowing automatic restarting of persistent groups without user
534 * interaction. If this callback is not implemented (i.e., is %NULL),
535 * the received Invitation Request frames are replied with
536 * %P2P_SC_REQ_RECEIVED status and indicated to upper layer with the
537 * invitation_result() callback.
539 * If the requested parameters are acceptable and the group is known,
540 * %P2P_SC_SUCCESS may be returned. If the requested group is unknown,
541 * %P2P_SC_FAIL_UNKNOWN_GROUP should be returned. %P2P_SC_REQ_RECEIVED
542 * can be returned if there is not enough data to provide immediate
543 * response, i.e., if some sort of user interaction is needed. The
544 * invitation_received() callback will be called in that case
545 * immediately after this call.
547 u8 (*invitation_process)(void *ctx, const u8 *sa, const u8 *bssid,
548 const u8 *go_dev_addr, const u8 *ssid,
549 size_t ssid_len, int *go, u8 *group_bssid,
550 int *force_freq, int persistent_group);
553 * invitation_received - Callback on Invitation Request RX
554 * @ctx: Callback context from cb_ctx
555 * @sa: Source address of the Invitation Request
556 * @bssid: P2P Group BSSID or %NULL if not received
557 * @ssid: SSID of the group
558 * @ssid_len: Length of ssid in octets
559 * @go_dev_addr: GO Device Address
560 * @status: Response Status
561 * @op_freq: Operational frequency for the group
563 * This callback is used to indicate sending of an Invitation Response
564 * for a received Invitation Request. If status == 0 (success), the
565 * upper layer code is responsible for starting the group. status == 1
566 * indicates need to get user authorization for the group. Other status
567 * values indicate that the invitation request was rejected.
569 void (*invitation_received)(void *ctx, const u8 *sa, const u8 *bssid,
570 const u8 *ssid, size_t ssid_len,
571 const u8 *go_dev_addr, u8 status,
575 * invitation_result - Callback on Invitation result
576 * @ctx: Callback context from cb_ctx
577 * @status: Negotiation result (Status Code)
578 * @bssid: P2P Group BSSID or %NULL if not received
580 * This callback is used to indicate result of an Invitation procedure
581 * started with a call to p2p_invite(). The indicated status code is
582 * the value received from the peer in Invitation Response with 0
583 * (P2P_SC_SUCCESS) indicating success or -1 to indicate a timeout or a
584 * local failure in transmitting the Invitation Request.
586 void (*invitation_result)(void *ctx, int status, const u8 *bssid);
590 /* P2P module initialization/deinitialization */
593 * p2p_init - Initialize P2P module
594 * @cfg: P2P module configuration
595 * Returns: Pointer to private data or %NULL on failure
597 * This function is used to initialize global P2P module context (one per
598 * device). The P2P module will keep a copy of the configuration data, so the
599 * caller does not need to maintain this structure. However, the callback
600 * functions and the context parameters to them must be kept available until
601 * the P2P module is deinitialized with p2p_deinit().
603 struct p2p_data * p2p_init(const struct p2p_config *cfg);
606 * p2p_deinit - Deinitialize P2P module
607 * @p2p: P2P module context from p2p_init()
609 void p2p_deinit(struct p2p_data *p2p);
612 * p2p_flush - Flush P2P module state
613 * @p2p: P2P module context from p2p_init()
615 * This command removes the P2P module state like peer device entries.
617 void p2p_flush(struct p2p_data *p2p);
620 * p2p_unauthorize - Unauthorize the specified peer device
621 * @p2p: P2P module context from p2p_init()
622 * @addr: P2P peer entry to be unauthorized
623 * Returns: 0 on success, -1 on failure
625 * This command removes any connection authorization from the specified P2P
626 * peer device address. This can be used, e.g., to cancel effect of a previous
627 * p2p_authorize() or p2p_connect() call that has not yet resulted in completed
630 int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr);
633 * p2p_set_dev_name - Set device name
634 * @p2p: P2P module context from p2p_init()
635 * Returns: 0 on success, -1 on failure
637 * This function can be used to update the P2P module configuration with
638 * information that was not available at the time of the p2p_init() call.
640 int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name);
643 * p2p_set_pri_dev_type - Set primary device type
644 * @p2p: P2P module context from p2p_init()
645 * Returns: 0 on success, -1 on failure
647 * This function can be used to update the P2P module configuration with
648 * information that was not available at the time of the p2p_init() call.
650 int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type);
653 * p2p_set_sec_dev_types - Set secondary device types
654 * @p2p: P2P module context from p2p_init()
655 * Returns: 0 on success, -1 on failure
657 * This function can be used to update the P2P module configuration with
658 * information that was not available at the time of the p2p_init() call.
660 int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
661 size_t num_dev_types);
663 int p2p_set_country(struct p2p_data *p2p, const char *country);
666 /* Commands from upper layer management entity */
668 enum p2p_discovery_type {
669 P2P_FIND_START_WITH_FULL,
670 P2P_FIND_ONLY_SOCIAL,
675 * p2p_find - Start P2P Find (Device Discovery)
676 * @p2p: P2P module context from p2p_init()
677 * @timeout: Timeout for find operation in seconds or 0 for no timeout
678 * @type: Device Discovery type
679 * Returns: 0 on success, -1 on failure
681 int p2p_find(struct p2p_data *p2p, unsigned int timeout,
682 enum p2p_discovery_type type);
685 * p2p_stop_find - Stop P2P Find (Device Discovery)
686 * @p2p: P2P module context from p2p_init()
688 void p2p_stop_find(struct p2p_data *p2p);
691 * p2p_stop_find_for_freq - Stop P2P Find for next oper on specific freq
692 * @p2p: P2P module context from p2p_init()
693 * @freq: Frequency in MHz for next operation
695 * This is like p2p_stop_find(), but Listen state is not stopped if we are
696 * already on the same frequency.
698 void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq);
701 * p2p_listen - Start P2P Listen state for specified duration
702 * @p2p: P2P module context from p2p_init()
703 * @timeout: Listen state duration in milliseconds
704 * Returns: 0 on success, -1 on failure
706 * This function can be used to request the P2P module to keep the device
707 * discoverable on the listen channel for an extended set of time. At least in
708 * its current form, this is mainly used for testing purposes and may not be of
709 * much use for normal P2P operations.
711 int p2p_listen(struct p2p_data *p2p, unsigned int timeout);
714 * p2p_connect - Start P2P group formation (GO negotiation)
715 * @p2p: P2P module context from p2p_init()
716 * @peer_addr: MAC address of the peer P2P client
717 * @wps_method: WPS method to be used in provisioning
718 * @go_intent: Local GO intent value (1..15)
719 * @own_interface_addr: Intended interface address to use with the group
720 * @force_freq: The only allowed channel frequency in MHz or 0
721 * @persistent_group: Whether to create a persistent group
722 * Returns: 0 on success, -1 on failure
724 int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
725 enum p2p_wps_method wps_method,
726 int go_intent, const u8 *own_interface_addr,
727 unsigned int force_freq, int persistent_group);
730 * p2p_authorize - Authorize P2P group formation (GO negotiation)
731 * @p2p: P2P module context from p2p_init()
732 * @peer_addr: MAC address of the peer P2P client
733 * @wps_method: WPS method to be used in provisioning
734 * @go_intent: Local GO intent value (1..15)
735 * @own_interface_addr: Intended interface address to use with the group
736 * @force_freq: The only allowed channel frequency in MHz or 0
737 * @persistent_group: Whether to create a persistent group
738 * Returns: 0 on success, -1 on failure
740 * This is like p2p_connect(), but the actual group negotiation is not
741 * initiated automatically, i.e., the other end is expected to do that.
743 int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
744 enum p2p_wps_method wps_method,
745 int go_intent, const u8 *own_interface_addr,
746 unsigned int force_freq, int persistent_group);
749 * p2p_reject - Reject peer device (explicitly block connection attempts)
750 * @p2p: P2P module context from p2p_init()
751 * @peer_addr: MAC address of the peer P2P client
752 * Returns: 0 on success, -1 on failure
754 int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr);
757 * p2p_prov_disc_req - Send Provision Discovery Request
758 * @p2p: P2P module context from p2p_init()
759 * @peer_addr: MAC address of the peer P2P client
760 * @config_methods: WPS Config Methods value (only one bit set)
761 * @join: Whether this is used by a client joining an active group
762 * Returns: 0 on success, -1 on failure
764 * This function can be used to request a discovered P2P peer to display a PIN
765 * (config_methods = WPS_CONFIG_DISPLAY) or be prepared to enter a PIN from us
766 * (config_methods = WPS_CONFIG_KEYPAD). The Provision Discovery Request frame
767 * is transmitted once immediately and if no response is received, the frame
768 * will be sent again whenever the target device is discovered during device
769 * dsicovery (start with a p2p_find() call). Response from the peer is
770 * indicated with the p2p_config::prov_disc_resp() callback.
772 int p2p_prov_disc_req(struct p2p_data *p2p, const u8 *peer_addr,
773 u16 config_methods, int join);
776 * p2p_sd_request - Schedule a service discovery query
777 * @p2p: P2P module context from p2p_init()
778 * @dst: Destination peer or %NULL to apply for all peers
779 * @tlvs: P2P Service Query TLV(s)
780 * Returns: Reference to the query or %NULL on failure
782 * Response to the query is indicated with the p2p_config::sd_response()
785 void * p2p_sd_request(struct p2p_data *p2p, const u8 *dst,
786 const struct wpabuf *tlvs);
789 * p2p_sd_cancel_request - Cancel a pending service discovery query
790 * @p2p: P2P module context from p2p_init()
791 * @req: Query reference from p2p_sd_request()
792 * Returns: 0 if request for cancelled; -1 if not found
794 int p2p_sd_cancel_request(struct p2p_data *p2p, void *req);
797 * p2p_sd_response - Send response to a service discovery query
798 * @p2p: P2P module context from p2p_init()
799 * @freq: Frequency from p2p_config::sd_request() callback
800 * @dst: Destination address from p2p_config::sd_request() callback
801 * @dialog_token: Dialog token from p2p_config::sd_request() callback
802 * @resp_tlvs: P2P Service Response TLV(s)
804 * This function is called as a response to the request indicated with
805 * p2p_config::sd_request() callback.
807 void p2p_sd_response(struct p2p_data *p2p, int freq, const u8 *dst,
808 u8 dialog_token, const struct wpabuf *resp_tlvs);
811 * p2p_sd_service_update - Indicate a change in local services
812 * @p2p: P2P module context from p2p_init()
814 * This function needs to be called whenever there is a change in availability
815 * of the local services. This will increment the Service Update Indicator
816 * value which will be used in SD Request and Response frames.
818 void p2p_sd_service_update(struct p2p_data *p2p);
821 enum p2p_invite_role {
823 P2P_INVITE_ROLE_ACTIVE_GO,
824 P2P_INVITE_ROLE_CLIENT
828 * p2p_invite - Invite a P2P Device into a group
829 * @p2p: P2P module context from p2p_init()
830 * @peer: Device Address of the peer P2P Device
831 * @role: Local role in the group
832 * @bssid: Group BSSID or %NULL if not known
834 * @ssid_len: Length of ssid in octets
835 * @force_freq: The only allowed channel frequency in MHz or 0
836 * @go_dev_addr: Forced GO Device Address or %NULL if none
837 * @persistent_group: Whether this is to reinvoke a persistent group
838 * Returns: 0 on success, -1 on failure
840 int p2p_invite(struct p2p_data *p2p, const u8 *peer, enum p2p_invite_role role,
841 const u8 *bssid, const u8 *ssid, size_t ssid_len,
842 unsigned int force_freq, const u8 *go_dev_addr,
843 int persistent_group);
846 * p2p_presence_req - Request GO presence
847 * @p2p: P2P module context from p2p_init()
848 * @go_interface_addr: GO P2P Interface Address
849 * @own_interface_addr: Own P2P Interface Address for this group
850 * @freq: Group operating frequence (in MHz)
851 * @duration1: Preferred presence duration in microseconds
852 * @interval1: Preferred presence interval in microseconds
853 * @duration2: Acceptable presence duration in microseconds
854 * @interval2: Acceptable presence interval in microseconds
855 * Returns: 0 on success, -1 on failure
857 * If both duration and interval values are zero, the parameter pair is not
858 * specified (i.e., to remove Presence Request, use duration1 = interval1 = 0).
860 int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
861 const u8 *own_interface_addr, unsigned int freq,
862 u32 duration1, u32 interval1, u32 duration2,
866 * p2p_ext_listen - Set Extended Listen Timing
867 * @p2p: P2P module context from p2p_init()
868 * @freq: Group operating frequence (in MHz)
869 * @period: Availability period in milliseconds (1-65535; 0 to disable)
870 * @interval: Availability interval in milliseconds (1-65535; 0 to disable)
871 * Returns: 0 on success, -1 on failure
873 * This function can be used to enable or disable (period = interval = 0)
874 * Extended Listen Timing. When enabled, the P2P Device will become
875 * discoverable (go into Listen State) every @interval milliseconds for at
876 * least @period milliseconds.
878 int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
879 unsigned int interval);
881 /* Event notifications from upper layer management operations */
884 * p2p_wps_success_cb - Report successfully completed WPS provisioning
885 * @p2p: P2P module context from p2p_init()
886 * @mac_addr: Peer address
888 * This function is used to report successfully completed WPS provisioning
889 * during group formation in both GO/Registrar and client/Enrollee roles.
891 void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr);
894 * p2p_group_formation_failed - Report failed WPS provisioning
895 * @p2p: P2P module context from p2p_init()
897 * This function is used to report failed group formation. This can happen
898 * either due to failed WPS provisioning or due to 15 second timeout during
899 * the provisioning phase.
901 void p2p_group_formation_failed(struct p2p_data *p2p);
904 /* Event notifications from lower layer driver operations */
907 * p2p_probe_req_rx - Report reception of a Probe Request frame
908 * @p2p: P2P module context from p2p_init()
909 * @addr: Source MAC address
910 * @ie: Information elements from the Probe Request frame body
911 * @ie_len: Length of ie buffer in octets
912 * Returns: 0 to indicate the frame was not processed or 1 if it was
914 int p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *ie,
918 * p2p_rx_action - Report received Action frame
919 * @p2p: P2P module context from p2p_init()
920 * @da: Destination address of the received Action frame
921 * @sa: Source address of the received Action frame
922 * @bssid: Address 3 of the received Action frame
923 * @category: Category of the received Action frame
924 * @data: Action frame body after the Category field
925 * @len: Length of the data buffer in octets
926 * @freq: Frequency (in MHz) on which the frame was received
928 void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
929 const u8 *bssid, u8 category,
930 const u8 *data, size_t len, int freq);
933 * p2p_scan_res_handler - Indicate a P2P scan results
934 * @p2p: P2P module context from p2p_init()
935 * @bssid: BSSID of the scan result
936 * @freq: Frequency of the channel on which the device was found in MHz
937 * @level: Signal level (signal strength of the received Beacon/Probe Response
939 * @ies: Pointer to IEs from the scan result
940 * @ies_len: Length of the ies buffer
941 * Returns: 0 to continue or 1 to stop scan result indication
943 * This function is called to indicate a scan result entry with P2P IE from a
944 * scan requested with struct p2p_config::p2p_scan(). This can be called during
945 * the actual scan process (i.e., whenever a new device is found) or as a
946 * sequence of calls after the full scan has been completed. The former option
947 * can result in optimized operations, but may not be supported by all
948 * driver/firmware designs. The ies buffer need to include at least the P2P IE,
949 * but it is recommended to include all IEs received from the device. The
950 * caller does not need to check that the IEs contain a P2P IE before calling
951 * this function since frames will be filtered internally if needed.
953 * This function will return 1 if it wants to stop scan result iteration (and
954 * scan in general if it is still in progress). This is used to allow faster
955 * start of a pending operation, e.g., to start a pending GO negotiation.
957 int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
958 int level, const u8 *ies, size_t ies_len);
961 * p2p_scan_res_handled - Indicate end of scan results
962 * @p2p: P2P module context from p2p_init()
964 * This function is called to indicate that all P2P scan results from a scan
965 * have been reported with zero or more calls to p2p_scan_res_handler(). This
966 * function must be called as a response to successful
967 * struct p2p_config::p2p_scan() call if none of the p2p_scan_res_handler()
968 * calls stopped iteration.
970 void p2p_scan_res_handled(struct p2p_data *p2p);
972 enum p2p_send_action_result {
973 P2P_SEND_ACTION_SUCCESS /* Frame was send and acknowledged */,
974 P2P_SEND_ACTION_NO_ACK /* Frame was sent, but not acknowledged */,
975 P2P_SEND_ACTION_FAILED /* Frame was not sent due to a failure */
979 * p2p_send_action_cb - Notify TX status of an Action frame
980 * @p2p: P2P module context from p2p_init()
981 * @freq: Channel frequency in MHz
982 * @dst: Destination MAC address (Address 1)
983 * @src: Source MAC address (Address 2)
984 * @bssid: BSSID (Address 3)
985 * @result: Result of the transmission attempt
987 * This function is used to indicate the result of an Action frame transmission
988 * that was requested with struct p2p_config::send_action() callback.
990 void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
991 const u8 *src, const u8 *bssid,
992 enum p2p_send_action_result result);
995 * p2p_listen_cb - Indicate the start of a requested Listen state
996 * @p2p: P2P module context from p2p_init()
997 * @freq: Listen channel frequency in MHz
998 * @duration: Duration for the Listen state in milliseconds
1000 * This function is used to indicate that a Listen state requested with
1001 * struct p2p_config::start_listen() callback has started.
1003 void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
1004 unsigned int duration);
1007 * p2p_listen_end - Indicate the end of a requested Listen state
1008 * @p2p: P2P module context from p2p_init()
1009 * @freq: Listen channel frequency in MHz
1010 * Returns: 0 if no operations were started, 1 if an operation was started
1012 * This function is used to indicate that a Listen state requested with
1013 * struct p2p_config::start_listen() callback has ended.
1015 int p2p_listen_end(struct p2p_data *p2p, unsigned int freq);
1017 void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
1018 const u8 *ie, size_t ie_len);
1020 void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
1021 const u8 *ie, size_t ie_len);
1024 /* Per-group P2P state for GO */
1029 * struct p2p_group_config - P2P group configuration
1031 * This configuration is provided to the P2P module during initialization of
1032 * the per-group information with p2p_group_init().
1034 struct p2p_group_config {
1036 * persistent_group - Whether the group is persistent
1038 int persistent_group;
1041 * interface_addr - P2P Interface Address of the group
1043 u8 interface_addr[ETH_ALEN];
1046 * max_clients - Maximum number of clients in the group
1048 unsigned int max_clients;
1051 * cb_ctx - Context to use with callback functions
1056 * ie_update - Notification of IE update
1057 * @ctx: Callback context from cb_ctx
1058 * @beacon_ies: P2P IE for Beacon frames or %NULL if no change
1059 * @proberesp_ies: P2P Ie for Probe Response frames
1061 * P2P module uses this callback function to notify whenever the P2P IE
1062 * in Beacon or Probe Response frames should be updated based on group
1065 * The callee is responsible for freeing the returned buffer(s) with
1068 void (*ie_update)(void *ctx, struct wpabuf *beacon_ies,
1069 struct wpabuf *proberesp_ies);
1072 * idle_update - Notification of changes in group idle state
1073 * @ctx: Callback context from cb_ctx
1074 * @idle: Whether the group is idle (no associated stations)
1076 void (*idle_update)(void *ctx, int idle);
1080 * p2p_group_init - Initialize P2P group
1081 * @p2p: P2P module context from p2p_init()
1082 * @config: P2P group configuration (will be freed by p2p_group_deinit())
1083 * Returns: Pointer to private data or %NULL on failure
1085 * This function is used to initialize per-group P2P module context. Currently,
1086 * this is only used to manage GO functionality and P2P clients do not need to
1087 * create an instance of this per-group information.
1089 struct p2p_group * p2p_group_init(struct p2p_data *p2p,
1090 struct p2p_group_config *config);
1093 * p2p_group_deinit - Deinitialize P2P group
1094 * @group: P2P group context from p2p_group_init()
1096 void p2p_group_deinit(struct p2p_group *group);
1099 * p2p_group_notif_assoc - Notification of P2P client association with GO
1100 * @group: P2P group context from p2p_group_init()
1101 * @addr: Interface address of the P2P client
1102 * @ie: IEs from the (Re)association Request frame
1103 * @len: Length of the ie buffer in octets
1104 * Returns: 0 on success, -1 on failure
1106 int p2p_group_notif_assoc(struct p2p_group *group, const u8 *addr,
1107 const u8 *ie, size_t len);
1110 * p2p_group_assoc_resp_ie - Build P2P IE for (re)association response
1111 * @group: P2P group context from p2p_group_init()
1112 * @status: Status value (P2P_SC_SUCCESS if association succeeded)
1113 * Returns: P2P IE for (Re)association Response or %NULL on failure
1115 * The caller is responsible for freeing the returned buffer with
1118 struct wpabuf * p2p_group_assoc_resp_ie(struct p2p_group *group, u8 status);
1121 * p2p_group_notif_disassoc - Notification of P2P client disassociation from GO
1122 * @group: P2P group context from p2p_group_init()
1123 * @addr: Interface address of the P2P client
1125 void p2p_group_notif_disassoc(struct p2p_group *group, const u8 *addr);
1128 * p2p_group_notif_formation_done - Notification of completed group formation
1129 * @group: P2P group context from p2p_group_init()
1131 void p2p_group_notif_formation_done(struct p2p_group *group);
1134 * p2p_group_notif_noa - Notification of NoA change
1135 * @group: P2P group context from p2p_group_init()
1136 * @noa: Notice of Absence attribute payload, %NULL if none
1137 * @noa_len: Length of noa buffer in octets
1138 * Returns: 0 on success, -1 on failure
1140 * Notify the P2P group management about a new NoA contents. This will be
1141 * inserted into the P2P IEs in Beacon and Probe Response frames with rest of
1142 * the group information.
1144 int p2p_group_notif_noa(struct p2p_group *group, const u8 *noa,
1148 * p2p_group_match_dev_type - Match device types in group with requested type
1149 * @group: P2P group context from p2p_group_init()
1150 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
1151 * Returns: 1 on match, 0 on mismatch
1153 * This function can be used to match the Requested Device Type attribute in
1154 * WPS IE with the device types of a group member for deciding whether a GO
1155 * should reply to a Probe Request frame. Match will be reported if the WPS IE
1156 * is not requested any specific device type.
1158 int p2p_group_match_dev_type(struct p2p_group *group, struct wpabuf *wps);
1161 * p2p_group_go_discover - Send GO Discoverability Request to a group client
1162 * @group: P2P group context from p2p_group_init()
1163 * Returns: 0 on success (frame scheduled); -1 if client was not found
1165 int p2p_group_go_discover(struct p2p_group *group, const u8 *dev_id,
1166 const u8 *searching_dev, int rx_freq);
1169 /* Generic helper functions */
1172 * p2p_ie_text - Build text format description of P2P IE
1174 * @buf: Buffer for returning text
1175 * @end: Pointer to the end of the buf area
1176 * Returns: Number of octets written to the buffer or -1 on failure
1178 * This function can be used to parse P2P IE contents into text format
1179 * field=value lines.
1181 int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end);
1184 * p2p_scan_result_text - Build text format description of P2P IE
1185 * @ies: Information elements from scan results
1186 * @ies_len: ies buffer length in octets
1187 * @buf: Buffer for returning text
1188 * @end: Pointer to the end of the buf area
1189 * Returns: Number of octets written to the buffer or -1 on failure
1191 * This function can be used to parse P2P IE contents into text format
1192 * field=value lines.
1194 int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end);
1197 * p2p_assoc_req_ie - Build P2P IE for (Re)Association Request frame
1198 * @p2p: P2P module context from p2p_init()
1200 * @buf: Buffer for writing the P2P IE
1201 * @len: Maximum buf length in octets
1202 * @p2p_group: Whether this is for association with a P2P GO
1203 * @p2p_ie: Reassembled P2P IE data from scan results or %NULL if none
1204 * Returns: Number of octets written into buf or -1 on failure
1206 int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
1207 size_t len, int p2p_group, struct wpabuf *p2p_ie);
1210 * p2p_scan_ie - Build P2P IE for Probe Request
1211 * @p2p: P2P module context from p2p_init()
1212 * @ies: Buffer for writing P2P IE
1214 void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies);
1217 * p2p_go_params - Generate random P2P group parameters
1218 * @p2p: P2P module context from p2p_init()
1219 * @params: Buffer for parameters
1220 * Returns: 0 on success, -1 on failure
1222 int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params);
1225 * p2p_get_group_capab - Get Group Capability from P2P IE data
1226 * @p2p_ie: P2P IE(s) contents
1227 * Returns: Group Capability
1229 u8 p2p_get_group_capab(const struct wpabuf *p2p_ie);
1232 * p2p_get_cross_connect_disallowed - Does WLAN AP disallows cross connection
1233 * @p2p_ie: P2P IE(s) contents
1234 * Returns: 0 if cross connection is allow, 1 if not
1236 int p2p_get_cross_connect_disallowed(const struct wpabuf *p2p_ie);
1239 * p2p_get_go_dev_addr - Get P2P Device Address from P2P IE data
1240 * @p2p_ie: P2P IE(s) contents
1241 * Returns: Pointer to P2P Device Address or %NULL if not included
1243 const u8 * p2p_get_go_dev_addr(const struct wpabuf *p2p_ie);
1246 * p2p_get_peer_info - Get P2P peer information in text format
1247 * @p2p: P2P module context from p2p_init()
1248 * @addr: P2P Device Address of the peer or %NULL to indicate the first peer
1249 * @next: Whether to select the peer entry following the one indicated by addr
1250 * @buf: Buffer for returning text
1251 * @buflen: Maximum buffer length
1252 * Returns: Number of octets written to the buffer or -1 on failure
1254 int p2p_get_peer_info(struct p2p_data *p2p, const u8 *addr, int next,
1255 char *buf, size_t buflen);
1258 * p2p_set_client_discoverability - Set client discoverability capability
1259 * @p2p: P2P module context from p2p_init()
1260 * @enabled: Whether client discoverability will be enabled
1262 * This function can be used to disable (and re-enable) client discoverability.
1263 * This capability is enabled by default and should not be disabled in normal
1264 * use cases, i.e., this is mainly for testing purposes.
1266 void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled);
1269 * p2p_set_manageD_oper - Set managed P2P Device operations capability
1270 * @p2p: P2P module context from p2p_init()
1271 * @enabled: Whether managed P2P Device operations will be enabled
1273 void p2p_set_managed_oper(struct p2p_data *p2p, int enabled);
1275 int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel);
1277 int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len);
1279 int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
1281 int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
1284 void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr);
1287 * p2p_set_cross_connect - Set cross connection capability
1288 * @p2p: P2P module context from p2p_init()
1289 * @enabled: Whether cross connection will be enabled
1291 void p2p_set_cross_connect(struct p2p_data *p2p, int enabled);
1293 int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr);
1295 int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq, int level,
1296 const u8 *ies, size_t ies_len);
1299 * p2p_set_intra_bss_dist - Set intra BSS distribution
1300 * @p2p: P2P module context from p2p_init()
1301 * @enabled: Whether intra BSS distribution will be enabled
1303 void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled);
1306 * p2p_supported_freq - Check whether channel is supported for P2P
1307 * @p2p: P2P module context from p2p_init()
1308 * @freq: Channel frequency in MHz
1309 * Returns: 0 if channel not usable for P2P, 1 if usable for P2P
1311 int p2p_supported_freq(struct p2p_data *p2p, unsigned int freq);
1313 void p2p_update_channel_list(struct p2p_data *p2p, struct p2p_channels *chan);
1316 * p2p_set_best_channels - Update best channel information
1317 * @p2p: P2P module context from p2p_init()
1318 * @freq_24: Frequency (MHz) of best channel in 2.4 GHz band
1319 * @freq_5: Frequency (MHz) of best channel in 5 GHz band
1320 * @freq_overall: Frequency (MHz) of best channel overall
1322 void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
1325 const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p);
1328 * p2p_get_group_num_members - Get number of members in group
1329 * @group: P2P group context from p2p_group_init()
1330 * Returns: Number of members in the group
1332 unsigned int p2p_get_group_num_members(struct p2p_group *group);
1335 * p2p_iterate_group_members - Iterate group members
1336 * @group: P2P group context from p2p_group_init()
1337 * @next: iteration pointer, must be a pointer to a void * that is set to %NULL
1338 * on the first call and not modified later
1339 * Returns: A P2P Interface Address for each call and %NULL for no more members
1341 const u8 * p2p_iterate_group_members(struct p2p_group *group, void **next);