src/p2p/p2p_pd.c - platform/external/wpa_supplicant_8 - Git at Google

 /*
  * Wi-Fi Direct - P2P provision discovery
  * Copyright (c) 2009-2010, Atheros Communications
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
  */

 #include "includes.h"

 #include "common.h"
 #include "common/ieee802_11_defs.h"
 #include "wps/wps_defs.h"
 #include "p2p_i.h"
 #include "p2p.h"


 /*
  * Number of retries to attempt for provision discovery requests
  * in case the peer is not listening.
  */
 #define MAX_PROV_DISC_REQ_RETRIES 10


 static void p2p_build_wps_ie_config_methods(struct wpabuf *buf,
 					    u16 config_methods)
 {
 	u8 *len;
 	wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
 	len = wpabuf_put(buf, 1);
 	wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);

 	/* Config Methods */
 	wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
 	wpabuf_put_be16(buf, 2);
 	wpabuf_put_be16(buf, config_methods);

 	p2p_buf_update_ie_hdr(buf, len);
 }


 static struct wpabuf * p2p_build_prov_disc_req(struct p2p_data *p2p,
 					       u8 dialog_token,
 					       u16 config_methods,
 					       struct p2p_device *go)
 {
 	struct wpabuf *buf;
 	u8 *len;
 	size_t extra = 0;

 #ifdef CONFIG_WIFI_DISPLAY
 	if (p2p->wfd_ie_prov_disc_req)
 		extra = wpabuf_len(p2p->wfd_ie_prov_disc_req);
 #endif /* CONFIG_WIFI_DISPLAY */

 	buf = wpabuf_alloc(1000 + extra);
 	if (buf == NULL)
 		return NULL;

 	p2p_buf_add_public_action_hdr(buf, P2P_PROV_DISC_REQ, dialog_token);

 	len = p2p_buf_add_ie_hdr(buf);
 	p2p_buf_add_capability(buf, p2p->dev_capab &
 			       ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
 	p2p_buf_add_device_info(buf, p2p, NULL);
 	if (go) {
 		p2p_buf_add_group_id(buf, go->info.p2p_device_addr,
 				     go->oper_ssid, go->oper_ssid_len);
 	}
 	p2p_buf_update_ie_hdr(buf, len);

 	/* WPS IE with Config Methods attribute */
 	p2p_build_wps_ie_config_methods(buf, config_methods);

 #ifdef CONFIG_WIFI_DISPLAY
 	if (p2p->wfd_ie_prov_disc_req)
 		wpabuf_put_buf(buf, p2p->wfd_ie_prov_disc_req);
 #endif /* CONFIG_WIFI_DISPLAY */

 	return buf;
 }


 static struct wpabuf * p2p_build_prov_disc_resp(struct p2p_data *p2p,
 						u8 dialog_token,
 						u16 config_methods,
 						const u8 *group_id,
 						size_t group_id_len)
 {
 	struct wpabuf *buf;
 	size_t extra = 0;

 #ifdef CONFIG_WIFI_DISPLAY
 	struct wpabuf *wfd_ie = p2p->wfd_ie_prov_disc_resp;
 	if (wfd_ie && group_id) {
 		size_t i;
 		for (i = 0; i < p2p->num_groups; i++) {
 			struct p2p_group *g = p2p->groups[i];
 			struct wpabuf *ie;
 			if (!p2p_group_is_group_id_match(g, group_id,
 							 group_id_len))
 				continue;
 			ie = p2p_group_get_wfd_ie(g);
 			if (ie) {
 				wfd_ie = ie;
 				break;
 			}
 		}
 	}
 	if (wfd_ie)
 		extra = wpabuf_len(wfd_ie);
 #endif /* CONFIG_WIFI_DISPLAY */

 	buf = wpabuf_alloc(100 + extra);
 	if (buf == NULL)
 		return NULL;

 	p2p_buf_add_public_action_hdr(buf, P2P_PROV_DISC_RESP, dialog_token);

 	/* WPS IE with Config Methods attribute */
 	p2p_build_wps_ie_config_methods(buf, config_methods);

 #ifdef CONFIG_WIFI_DISPLAY
 	if (wfd_ie)
 		wpabuf_put_buf(buf, wfd_ie);
 #endif /* CONFIG_WIFI_DISPLAY */

 	return buf;
 }


 void p2p_process_prov_disc_req(struct p2p_data *p2p, const u8 *sa,
 			       const u8 *data, size_t len, int rx_freq)
 {
 	struct p2p_message msg;
 	struct p2p_device *dev;
 	int freq;
 	int reject = 1;
 	struct wpabuf *resp;

 	if (p2p_parse(data, len, &msg))
 		return;

 	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 		"P2P: Received Provision Discovery Request from " MACSTR
 		" with config methods 0x%x (freq=%d)",
 		MAC2STR(sa), msg.wps_config_methods, rx_freq);

 	dev = p2p_get_device(p2p, sa);
 	if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Provision Discovery Request from "
 			"unknown peer " MACSTR, MAC2STR(sa));
 		if (p2p_add_device(p2p, sa, rx_freq, 0, data + 1, len - 1, 0))
 		{
 			wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			        "P2P: Provision Discovery Request add device "
 				"failed " MACSTR, MAC2STR(sa));
 		}
 	} else if (msg.wfd_subelems) {
 		wpabuf_free(dev->info.wfd_subelems);
 		dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
 	}

 	if (!(msg.wps_config_methods &
 	      (WPS_CONFIG_DISPLAY | WPS_CONFIG_KEYPAD |
 	       WPS_CONFIG_PUSHBUTTON))) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Unsupported "
 			"Config Methods in Provision Discovery Request");
 		goto out;
 	}

 	if (msg.group_id) {
 		size_t i;
 		for (i = 0; i < p2p->num_groups; i++) {
 			if (p2p_group_is_group_id_match(p2p->groups[i],
 							msg.group_id,
 							msg.group_id_len))
 				break;
 		}
 		if (i == p2p->num_groups) {
 			wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: PD "
 				"request for unknown P2P Group ID - reject");
 			goto out;
 		}
 	}

 	if (dev)
 		dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY |
 				P2P_DEV_PD_PEER_KEYPAD);
 	if (msg.wps_config_methods & WPS_CONFIG_DISPLAY) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
 			" requested us to show a PIN on display", MAC2STR(sa));
 		if (dev)
 			dev->flags |= P2P_DEV_PD_PEER_KEYPAD;
 	} else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
 			" requested us to write its PIN using keypad",
 			MAC2STR(sa));
 		if (dev)
 			dev->flags |= P2P_DEV_PD_PEER_DISPLAY;
 	}

 	reject = 0;

 out:
 	resp = p2p_build_prov_disc_resp(p2p, msg.dialog_token,
 					reject ? 0 : msg.wps_config_methods,
 					msg.group_id, msg.group_id_len);
 	if (resp == NULL) {
 		p2p_parse_free(&msg);
 		return;
 	}
 	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 		"P2P: Sending Provision Discovery Response");
 	if (rx_freq > 0)
 		freq = rx_freq;
 	else
 		freq = p2p_channel_to_freq(p2p->cfg->country,
 					   p2p->cfg->reg_class,
 					   p2p->cfg->channel);
 	if (freq < 0) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Unknown regulatory class/channel");
 		wpabuf_free(resp);
 		p2p_parse_free(&msg);
 		return;
 	}
 	p2p->pending_action_state = P2P_NO_PENDING_ACTION;
 	if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
 			    p2p->cfg->dev_addr,
 			    wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Failed to send Action frame");
 	}

 	wpabuf_free(resp);

 	if (!reject && p2p->cfg->prov_disc_req) {
 		const u8 *dev_addr = sa;
 		if (msg.p2p_device_addr)
 			dev_addr = msg.p2p_device_addr;
 		p2p->cfg->prov_disc_req(p2p->cfg->cb_ctx, sa,
 					msg.wps_config_methods,
 					dev_addr, msg.pri_dev_type,
 					msg.device_name, msg.config_methods,
 					msg.capability ? msg.capability[0] : 0,
 					msg.capability ? msg.capability[1] :
 					0,
 					msg.group_id, msg.group_id_len);
 	}
 	p2p_parse_free(&msg);
 }


 void p2p_process_prov_disc_resp(struct p2p_data *p2p, const u8 *sa,
 				const u8 *data, size_t len)
 {
 	struct p2p_message msg;
 	struct p2p_device *dev;
 	u16 report_config_methods = 0;
 	int success = 0;

 	if (p2p_parse(data, len, &msg))
 		return;

 	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 		"P2P: Received Provision Discovery Response from " MACSTR
 		" with config methods 0x%x",
 		MAC2STR(sa), msg.wps_config_methods);

 	dev = p2p_get_device(p2p, sa);
 	if (dev == NULL || !dev->req_config_methods) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Ignore Provision Discovery Response from "
 			MACSTR " with no pending request", MAC2STR(sa));
 		p2p_parse_free(&msg);
 		return;
 	}

 	if (dev->dialog_token != msg.dialog_token) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Ignore Provision Discovery Response with "
 			"unexpected Dialog Token %u (expected %u)",
 			msg.dialog_token, dev->dialog_token);
 		p2p_parse_free(&msg);
 		return;
 	}

 	if (p2p->pending_action_state == P2P_PENDING_PD) {
 		os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
 		p2p->pending_action_state = P2P_NO_PENDING_ACTION;
 	}

 	/*
 	 * If the response is from the peer to whom a user initiated request
 	 * was sent earlier, we reset that state info here.
 	 */
 	if (p2p->user_initiated_pd &&
 	    os_memcmp(p2p->pending_pd_devaddr, sa, ETH_ALEN) == 0)
 		p2p_reset_pending_pd(p2p);

 	if (msg.wps_config_methods != dev->req_config_methods) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer rejected "
 			"our Provision Discovery Request");
 		if (p2p->cfg->prov_disc_fail)
 			p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
 						 P2P_PROV_DISC_REJECTED);
 		p2p_parse_free(&msg);
 		goto out;
 	}

 	report_config_methods = dev->req_config_methods;
 	dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY |
 			P2P_DEV_PD_PEER_KEYPAD);
 	if (dev->req_config_methods & WPS_CONFIG_DISPLAY) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
 			" accepted to show a PIN on display", MAC2STR(sa));
 		dev->flags |= P2P_DEV_PD_PEER_DISPLAY;
 	} else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
 			" accepted to write our PIN using keypad",
 			MAC2STR(sa));
 		dev->flags |= P2P_DEV_PD_PEER_KEYPAD;
 	}

 	/* Store the provisioning info */
 	dev->wps_prov_info = msg.wps_config_methods;

 	p2p_parse_free(&msg);
 	success = 1;

 out:
 	dev->req_config_methods = 0;
 	p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
 	if (dev->flags & P2P_DEV_PD_BEFORE_GO_NEG) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Start GO Neg after the PD-before-GO-Neg "
 			"workaround with " MACSTR,
 			MAC2STR(dev->info.p2p_device_addr));
 		dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
 		p2p_connect_send(p2p, dev);
 		return;
 	}
 	if (success && p2p->cfg->prov_disc_resp)
 		p2p->cfg->prov_disc_resp(p2p->cfg->cb_ctx, sa,
 					 report_config_methods);
 }


 int p2p_send_prov_disc_req(struct p2p_data *p2p, struct p2p_device *dev,
 			   int join, int force_freq)
 {
 	struct wpabuf *req;
 	int freq;

 	if (force_freq > 0)
 		freq = force_freq;
 	else
 		freq = dev->listen_freq > 0 ? dev->listen_freq :
 			dev->oper_freq;
 	if (freq <= 0) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: No Listen/Operating frequency known for the "
 			"peer " MACSTR " to send Provision Discovery Request",
 			MAC2STR(dev->info.p2p_device_addr));
 		return -1;
 	}

 	if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
 		if (!(dev->info.dev_capab &
 		      P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
 			wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 				"P2P: Cannot use PD with P2P Device " MACSTR
 				" that is in a group and is not discoverable",
 				MAC2STR(dev->info.p2p_device_addr));
 			return -1;
 		}
 		/* TODO: use device discoverability request through GO */
 	}

 	dev->dialog_token++;
 	if (dev->dialog_token == 0)
 		dev->dialog_token = 1;
 	req = p2p_build_prov_disc_req(p2p, dev->dialog_token,
 				      dev->req_config_methods,
 				      join ? dev : NULL);
 	if (req == NULL)
 		return -1;

 	if (p2p->state != P2P_IDLE)
 		p2p_stop_listen_for_freq(p2p, freq);
 	p2p->pending_action_state = P2P_PENDING_PD;
 	if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
 			    p2p->cfg->dev_addr, dev->info.p2p_device_addr,
 			    wpabuf_head(req), wpabuf_len(req), 200) < 0) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
 			"P2P: Failed to send Action frame");
 		wpabuf_free(req);
 		return -1;
 	}

 	os_memcpy(p2p->pending_pd_devaddr, dev->info.p2p_device_addr, ETH_ALEN);

 	wpabuf_free(req);
 	return 0;
 }


 int p2p_prov_disc_req(struct p2p_data *p2p, const u8 *peer_addr,
 		      u16 config_methods, int join, int force_freq)
 {
 	struct p2p_device *dev;

 	dev = p2p_get_device(p2p, peer_addr);
 	if (dev == NULL)
 		dev = p2p_get_device_interface(p2p, peer_addr);
 	if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Provision "
 			"Discovery Request destination " MACSTR
 			" not yet known", MAC2STR(peer_addr));
 		return -1;
 	}

 	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Provision Discovery "
 		"Request with " MACSTR " (config methods 0x%x)",
 		MAC2STR(peer_addr), config_methods);
 	if (config_methods == 0)
 		return -1;

 	/* Reset provisioning info */
 	dev->wps_prov_info = 0;

 	dev->req_config_methods = config_methods;
 	if (join)
 		dev->flags |= P2P_DEV_PD_FOR_JOIN;
 	else
 		dev->flags &= ~P2P_DEV_PD_FOR_JOIN;

 	if (p2p->state != P2P_IDLE && p2p->state != P2P_SEARCH &&
 	    p2p->state != P2P_LISTEN_ONLY) {
 		wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Busy with other "
 			"operations; postpone Provision Discovery Request "
 			"with " MACSTR " (config methods 0x%x)",
 			MAC2STR(peer_addr), config_methods);
 		return 0;
 	}

 	/*
 	 * We use the join param as a cue to differentiate between user
 	 * initiated PD request and one issued during finds (internal).
 	 */
 	p2p->user_initiated_pd = !join;

 	if (p2p->user_initiated_pd)
 		p2p->pd_retries = MAX_PROV_DISC_REQ_RETRIES;

 	return p2p_send_prov_disc_req(p2p, dev, join, force_freq);
 }


 void p2p_reset_pending_pd(struct p2p_data *p2p)
 {
 	struct p2p_device *dev;

 	dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
 		if (os_memcmp(p2p->pending_pd_devaddr,
 			      dev->info.p2p_device_addr, ETH_ALEN))
 			continue;
 		if (!dev->req_config_methods)
 			continue;
 		if (dev->flags & P2P_DEV_PD_FOR_JOIN)
 			continue;
 		/* Reset the config methods of the device */
 		dev->req_config_methods = 0;
 	}

 	p2p->user_initiated_pd = 0;
 	os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
 	p2p->pd_retries = 0;
 }
	/*
	* Wi-Fi Direct - P2P provision discovery
	* Copyright (c) 2009-2010, Atheros Communications
	*
	* This software may be distributed under the terms of the BSD license.
	* See README for more details.
	*/

	#include "includes.h"

	#include "common.h"
	#include "common/ieee802_11_defs.h"
	#include "wps/wps_defs.h"
	#include "p2p_i.h"
	#include "p2p.h"


	/*
	* Number of retries to attempt for provision discovery requests
	* in case the peer is not listening.
	*/
	#define MAX_PROV_DISC_REQ_RETRIES 10


	static void p2p_build_wps_ie_config_methods(struct wpabuf *buf,
	u16 config_methods)
	{
	u8 *len;
	wpabuf_put_u8(buf, WLAN_EID_VENDOR_SPECIFIC);
	len = wpabuf_put(buf, 1);
	wpabuf_put_be32(buf, WPS_DEV_OUI_WFA);

	/* Config Methods */
	wpabuf_put_be16(buf, ATTR_CONFIG_METHODS);
	wpabuf_put_be16(buf, 2);
	wpabuf_put_be16(buf, config_methods);

	p2p_buf_update_ie_hdr(buf, len);
	}


	static struct wpabuf * p2p_build_prov_disc_req(struct p2p_data *p2p,
	u8 dialog_token,
	u16 config_methods,
	struct p2p_device *go)
	{
	struct wpabuf *buf;
	u8 *len;
	size_t extra = 0;

	#ifdef CONFIG_WIFI_DISPLAY
	if (p2p->wfd_ie_prov_disc_req)
	extra = wpabuf_len(p2p->wfd_ie_prov_disc_req);
	#endif /* CONFIG_WIFI_DISPLAY */

	buf = wpabuf_alloc(1000 + extra);
	if (buf == NULL)
	return NULL;

	p2p_buf_add_public_action_hdr(buf, P2P_PROV_DISC_REQ, dialog_token);

	len = p2p_buf_add_ie_hdr(buf);
	p2p_buf_add_capability(buf, p2p->dev_capab &
	~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
	p2p_buf_add_device_info(buf, p2p, NULL);
	if (go) {
	p2p_buf_add_group_id(buf, go->info.p2p_device_addr,
	go->oper_ssid, go->oper_ssid_len);
	}
	p2p_buf_update_ie_hdr(buf, len);

	/* WPS IE with Config Methods attribute */
	p2p_build_wps_ie_config_methods(buf, config_methods);

	#ifdef CONFIG_WIFI_DISPLAY
	if (p2p->wfd_ie_prov_disc_req)
	wpabuf_put_buf(buf, p2p->wfd_ie_prov_disc_req);
	#endif /* CONFIG_WIFI_DISPLAY */

	return buf;
	}


	static struct wpabuf * p2p_build_prov_disc_resp(struct p2p_data *p2p,
	u8 dialog_token,
	u16 config_methods,
	const u8 *group_id,
	size_t group_id_len)
	{
	struct wpabuf *buf;
	size_t extra = 0;

	#ifdef CONFIG_WIFI_DISPLAY
	struct wpabuf *wfd_ie = p2p->wfd_ie_prov_disc_resp;
	if (wfd_ie && group_id) {
	size_t i;
	for (i = 0; i < p2p->num_groups; i++) {
	struct p2p_group *g = p2p->groups[i];
	struct wpabuf *ie;
	if (!p2p_group_is_group_id_match(g, group_id,
	group_id_len))
	continue;
	ie = p2p_group_get_wfd_ie(g);
	if (ie) {
	wfd_ie = ie;
	break;
	}
	}
	}
	if (wfd_ie)
	extra = wpabuf_len(wfd_ie);
	#endif /* CONFIG_WIFI_DISPLAY */

	buf = wpabuf_alloc(100 + extra);
	if (buf == NULL)
	return NULL;

	p2p_buf_add_public_action_hdr(buf, P2P_PROV_DISC_RESP, dialog_token);

	/* WPS IE with Config Methods attribute */
	p2p_build_wps_ie_config_methods(buf, config_methods);

	#ifdef CONFIG_WIFI_DISPLAY
	if (wfd_ie)
	wpabuf_put_buf(buf, wfd_ie);
	#endif /* CONFIG_WIFI_DISPLAY */

	return buf;
	}


	void p2p_process_prov_disc_req(struct p2p_data p2p, const u8 sa,
	const u8 *data, size_t len, int rx_freq)
	{
	struct p2p_message msg;
	struct p2p_device *dev;
	int freq;
	int reject = 1;
	struct wpabuf *resp;

	if (p2p_parse(data, len, &msg))
	return;

	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Received Provision Discovery Request from " MACSTR
	" with config methods 0x%x (freq=%d)",
	MAC2STR(sa), msg.wps_config_methods, rx_freq);

	dev = p2p_get_device(p2p, sa);
	if (dev == NULL \|\| (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Provision Discovery Request from "
	"unknown peer " MACSTR, MAC2STR(sa));
	if (p2p_add_device(p2p, sa, rx_freq, 0, data + 1, len - 1, 0))
	{
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Provision Discovery Request add device "
	"failed " MACSTR, MAC2STR(sa));
	}
	} else if (msg.wfd_subelems) {
	wpabuf_free(dev->info.wfd_subelems);
	dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
	}

	if (!(msg.wps_config_methods &
	(WPS_CONFIG_DISPLAY \| WPS_CONFIG_KEYPAD \|
	WPS_CONFIG_PUSHBUTTON))) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Unsupported "
	"Config Methods in Provision Discovery Request");
	goto out;
	}

	if (msg.group_id) {
	size_t i;
	for (i = 0; i < p2p->num_groups; i++) {
	if (p2p_group_is_group_id_match(p2p->groups[i],
	msg.group_id,
	msg.group_id_len))
	break;
	}
	if (i == p2p->num_groups) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: PD "
	"request for unknown P2P Group ID - reject");
	goto out;
	}
	}

	if (dev)
	dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY \|
	P2P_DEV_PD_PEER_KEYPAD);
	if (msg.wps_config_methods & WPS_CONFIG_DISPLAY) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
	" requested us to show a PIN on display", MAC2STR(sa));
	if (dev)
	dev->flags \|= P2P_DEV_PD_PEER_KEYPAD;
	} else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
	" requested us to write its PIN using keypad",
	MAC2STR(sa));
	if (dev)
	dev->flags \|= P2P_DEV_PD_PEER_DISPLAY;
	}

	reject = 0;

	out:
	resp = p2p_build_prov_disc_resp(p2p, msg.dialog_token,
	reject ? 0 : msg.wps_config_methods,
	msg.group_id, msg.group_id_len);
	if (resp == NULL) {
	p2p_parse_free(&msg);
	return;
	}
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Sending Provision Discovery Response");
	if (rx_freq > 0)
	freq = rx_freq;
	else
	freq = p2p_channel_to_freq(p2p->cfg->country,
	p2p->cfg->reg_class,
	p2p->cfg->channel);
	if (freq < 0) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Unknown regulatory class/channel");
	wpabuf_free(resp);
	p2p_parse_free(&msg);
	return;
	}
	p2p->pending_action_state = P2P_NO_PENDING_ACTION;
	if (p2p_send_action(p2p, freq, sa, p2p->cfg->dev_addr,
	p2p->cfg->dev_addr,
	wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Failed to send Action frame");
	}

	wpabuf_free(resp);

	if (!reject && p2p->cfg->prov_disc_req) {
	const u8 *dev_addr = sa;
	if (msg.p2p_device_addr)
	dev_addr = msg.p2p_device_addr;
	p2p->cfg->prov_disc_req(p2p->cfg->cb_ctx, sa,
	msg.wps_config_methods,
	dev_addr, msg.pri_dev_type,
	msg.device_name, msg.config_methods,
	msg.capability ? msg.capability[0] : 0,
	msg.capability ? msg.capability[1] :
	0,
	msg.group_id, msg.group_id_len);
	}
	p2p_parse_free(&msg);
	}


	void p2p_process_prov_disc_resp(struct p2p_data p2p, const u8 sa,
	const u8 *data, size_t len)
	{
	struct p2p_message msg;
	struct p2p_device *dev;
	u16 report_config_methods = 0;
	int success = 0;

	if (p2p_parse(data, len, &msg))
	return;

	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Received Provision Discovery Response from " MACSTR
	" with config methods 0x%x",
	MAC2STR(sa), msg.wps_config_methods);

	dev = p2p_get_device(p2p, sa);
	if (dev == NULL \|\| !dev->req_config_methods) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Ignore Provision Discovery Response from "
	MACSTR " with no pending request", MAC2STR(sa));
	p2p_parse_free(&msg);
	return;
	}

	if (dev->dialog_token != msg.dialog_token) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Ignore Provision Discovery Response with "
	"unexpected Dialog Token %u (expected %u)",
	msg.dialog_token, dev->dialog_token);
	p2p_parse_free(&msg);
	return;
	}

	if (p2p->pending_action_state == P2P_PENDING_PD) {
	os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
	p2p->pending_action_state = P2P_NO_PENDING_ACTION;
	}

	/*
	* If the response is from the peer to whom a user initiated request
	* was sent earlier, we reset that state info here.
	*/
	if (p2p->user_initiated_pd &&
	os_memcmp(p2p->pending_pd_devaddr, sa, ETH_ALEN) == 0)
	p2p_reset_pending_pd(p2p);

	if (msg.wps_config_methods != dev->req_config_methods) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer rejected "
	"our Provision Discovery Request");
	if (p2p->cfg->prov_disc_fail)
	p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx, sa,
	P2P_PROV_DISC_REJECTED);
	p2p_parse_free(&msg);
	goto out;
	}

	report_config_methods = dev->req_config_methods;
	dev->flags &= ~(P2P_DEV_PD_PEER_DISPLAY \|
	P2P_DEV_PD_PEER_KEYPAD);
	if (dev->req_config_methods & WPS_CONFIG_DISPLAY) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
	" accepted to show a PIN on display", MAC2STR(sa));
	dev->flags \|= P2P_DEV_PD_PEER_DISPLAY;
	} else if (msg.wps_config_methods & WPS_CONFIG_KEYPAD) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Peer " MACSTR
	" accepted to write our PIN using keypad",
	MAC2STR(sa));
	dev->flags \|= P2P_DEV_PD_PEER_KEYPAD;
	}

	/* Store the provisioning info */
	dev->wps_prov_info = msg.wps_config_methods;

	p2p_parse_free(&msg);
	success = 1;

	out:
	dev->req_config_methods = 0;
	p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
	if (dev->flags & P2P_DEV_PD_BEFORE_GO_NEG) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Start GO Neg after the PD-before-GO-Neg "
	"workaround with " MACSTR,
	MAC2STR(dev->info.p2p_device_addr));
	dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
	p2p_connect_send(p2p, dev);
	return;
	}
	if (success && p2p->cfg->prov_disc_resp)
	p2p->cfg->prov_disc_resp(p2p->cfg->cb_ctx, sa,
	report_config_methods);
	}


	int p2p_send_prov_disc_req(struct p2p_data p2p, struct p2p_device dev,
	int join, int force_freq)
	{
	struct wpabuf *req;
	int freq;

	if (force_freq > 0)
	freq = force_freq;
	else
	freq = dev->listen_freq > 0 ? dev->listen_freq :
	dev->oper_freq;
	if (freq <= 0) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: No Listen/Operating frequency known for the "
	"peer " MACSTR " to send Provision Discovery Request",
	MAC2STR(dev->info.p2p_device_addr));
	return -1;
	}

	if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
	if (!(dev->info.dev_capab &
	P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Cannot use PD with P2P Device " MACSTR
	" that is in a group and is not discoverable",
	MAC2STR(dev->info.p2p_device_addr));
	return -1;
	}
	/* TODO: use device discoverability request through GO */
	}

	dev->dialog_token++;
	if (dev->dialog_token == 0)
	dev->dialog_token = 1;
	req = p2p_build_prov_disc_req(p2p, dev->dialog_token,
	dev->req_config_methods,
	join ? dev : NULL);
	if (req == NULL)
	return -1;

	if (p2p->state != P2P_IDLE)
	p2p_stop_listen_for_freq(p2p, freq);
	p2p->pending_action_state = P2P_PENDING_PD;
	if (p2p_send_action(p2p, freq, dev->info.p2p_device_addr,
	p2p->cfg->dev_addr, dev->info.p2p_device_addr,
	wpabuf_head(req), wpabuf_len(req), 200) < 0) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG,
	"P2P: Failed to send Action frame");
	wpabuf_free(req);
	return -1;
	}

	os_memcpy(p2p->pending_pd_devaddr, dev->info.p2p_device_addr, ETH_ALEN);

	wpabuf_free(req);
	return 0;
	}


	int p2p_prov_disc_req(struct p2p_data p2p, const u8 peer_addr,
	u16 config_methods, int join, int force_freq)
	{
	struct p2p_device *dev;

	dev = p2p_get_device(p2p, peer_addr);
	if (dev == NULL)
	dev = p2p_get_device_interface(p2p, peer_addr);
	if (dev == NULL \|\| (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Provision "
	"Discovery Request destination " MACSTR
	" not yet known", MAC2STR(peer_addr));
	return -1;
	}

	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Provision Discovery "
	"Request with " MACSTR " (config methods 0x%x)",
	MAC2STR(peer_addr), config_methods);
	if (config_methods == 0)
	return -1;

	/* Reset provisioning info */
	dev->wps_prov_info = 0;

	dev->req_config_methods = config_methods;
	if (join)
	dev->flags \|= P2P_DEV_PD_FOR_JOIN;
	else
	dev->flags &= ~P2P_DEV_PD_FOR_JOIN;

	if (p2p->state != P2P_IDLE && p2p->state != P2P_SEARCH &&
	p2p->state != P2P_LISTEN_ONLY) {
	wpa_msg(p2p->cfg->msg_ctx, MSG_DEBUG, "P2P: Busy with other "
	"operations; postpone Provision Discovery Request "
	"with " MACSTR " (config methods 0x%x)",
	MAC2STR(peer_addr), config_methods);
	return 0;
	}

	/*
	* We use the join param as a cue to differentiate between user
	* initiated PD request and one issued during finds (internal).
	*/
	p2p->user_initiated_pd = !join;

	if (p2p->user_initiated_pd)
	p2p->pd_retries = MAX_PROV_DISC_REQ_RETRIES;

	return p2p_send_prov_disc_req(p2p, dev, join, force_freq);
	}


	void p2p_reset_pending_pd(struct p2p_data *p2p)
	{
	struct p2p_device *dev;

	dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
	if (os_memcmp(p2p->pending_pd_devaddr,
	dev->info.p2p_device_addr, ETH_ALEN))
	continue;
	if (!dev->req_config_methods)
	continue;
	if (dev->flags & P2P_DEV_PD_FOR_JOIN)
	continue;
	/* Reset the config methods of the device */
	dev->req_config_methods = 0;
	}

	p2p->user_initiated_pd = 0;
	os_memset(p2p->pending_pd_devaddr, 0, ETH_ALEN);
	p2p->pd_retries = 0;
	}