P2PS: Add service hash to Probe Request frames

[thirdparty/hostap.git] / src / p2p / p2p.c

/*
 * Wi-Fi Direct - P2P module
 * 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 "eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/wpa_ctrl.h"
#include "crypto/sha256.h"
#include "crypto/crypto.h"
#include "wps/wps_i.h"
#include "p2p_i.h"
#include "p2p.h"


static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx);
static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev);
static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
                                     const u8 *sa, const u8 *data, size_t len,
                                     int rx_freq);
static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
                                      const u8 *sa, const u8 *data,
                                      size_t len);
static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx);
static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx);


/*
 * p2p_scan recovery timeout
 *
 * Many drivers are using 30 second timeout on scan results. Allow a bit larger
 * timeout for this to avoid hitting P2P timeout unnecessarily.
 */
#define P2P_SCAN_TIMEOUT 35

/**
 * P2P_PEER_EXPIRATION_AGE - Number of seconds after which inactive peer
 * entries will be removed
 */
#ifndef P2P_PEER_EXPIRATION_AGE
#define P2P_PEER_EXPIRATION_AGE 60
#endif /* P2P_PEER_EXPIRATION_AGE */

#define P2P_PEER_EXPIRATION_INTERVAL (P2P_PEER_EXPIRATION_AGE / 2)

static void p2p_expire_peers(struct p2p_data *p2p)
{
        struct p2p_device *dev, *n;
        struct os_reltime now;
        size_t i;

        os_get_reltime(&now);
        dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
                if (dev->last_seen.sec + P2P_PEER_EXPIRATION_AGE >= now.sec)
                        continue;

                if (dev == p2p->go_neg_peer) {
                        /*
                         * GO Negotiation is in progress with the peer, so
                         * don't expire the peer entry until GO Negotiation
                         * fails or times out.
                         */
                        continue;
                }

                if (p2p->cfg->go_connected &&
                    p2p->cfg->go_connected(p2p->cfg->cb_ctx,
                                           dev->info.p2p_device_addr)) {
                        /*
                         * We are connected as a client to a group in which the
                         * peer is the GO, so do not expire the peer entry.
                         */
                        os_get_reltime(&dev->last_seen);
                        continue;
                }

                for (i = 0; i < p2p->num_groups; i++) {
                        if (p2p_group_is_client_connected(
                                    p2p->groups[i], dev->info.p2p_device_addr))
                                break;
                }
                if (i < p2p->num_groups) {
                        /*
                         * The peer is connected as a client in a group where
                         * we are the GO, so do not expire the peer entry.
                         */
                        os_get_reltime(&dev->last_seen);
                        continue;
                }

                p2p_dbg(p2p, "Expiring old peer entry " MACSTR,
                        MAC2STR(dev->info.p2p_device_addr));
                dl_list_del(&dev->list);
                p2p_device_free(p2p, dev);
        }
}


static void p2p_expiration_timeout(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;
        p2p_expire_peers(p2p);
        eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
                               p2p_expiration_timeout, p2p, NULL);
}


static const char * p2p_state_txt(int state)
{
        switch (state) {
        case P2P_IDLE:
                return "IDLE";
        case P2P_SEARCH:
                return "SEARCH";
        case P2P_CONNECT:
                return "CONNECT";
        case P2P_CONNECT_LISTEN:
                return "CONNECT_LISTEN";
        case P2P_GO_NEG:
                return "GO_NEG";
        case P2P_LISTEN_ONLY:
                return "LISTEN_ONLY";
        case P2P_WAIT_PEER_CONNECT:
                return "WAIT_PEER_CONNECT";
        case P2P_WAIT_PEER_IDLE:
                return "WAIT_PEER_IDLE";
        case P2P_SD_DURING_FIND:
                return "SD_DURING_FIND";
        case P2P_PROVISIONING:
                return "PROVISIONING";
        case P2P_PD_DURING_FIND:
                return "PD_DURING_FIND";
        case P2P_INVITE:
                return "INVITE";
        case P2P_INVITE_LISTEN:
                return "INVITE_LISTEN";
        default:
                return "?";
        }
}


const char * p2p_get_state_txt(struct p2p_data *p2p)
{
        return p2p_state_txt(p2p->state);
}


u16 p2p_get_provisioning_info(struct p2p_data *p2p, const u8 *addr)
{
        struct p2p_device *dev = NULL;

        if (!addr || !p2p)
                return 0;

        dev = p2p_get_device(p2p, addr);
        if (dev)
                return dev->wps_prov_info;
        else
                return 0;
}


void p2p_clear_provisioning_info(struct p2p_data *p2p, const u8 *addr)
{
        struct p2p_device *dev = NULL;

        if (!addr || !p2p)
                return;

        dev = p2p_get_device(p2p, addr);
        if (dev)
                dev->wps_prov_info = 0;
}


void p2p_set_state(struct p2p_data *p2p, int new_state)
{
        p2p_dbg(p2p, "State %s -> %s",
                p2p_state_txt(p2p->state), p2p_state_txt(new_state));
        p2p->state = new_state;

        if (new_state == P2P_IDLE && p2p->pending_channel) {
                p2p_dbg(p2p, "Apply change in listen channel");
                p2p->cfg->reg_class = p2p->pending_reg_class;
                p2p->cfg->channel = p2p->pending_channel;
                p2p->pending_reg_class = 0;
                p2p->pending_channel = 0;
        }
}


void p2p_set_timeout(struct p2p_data *p2p, unsigned int sec, unsigned int usec)
{
        p2p_dbg(p2p, "Set timeout (state=%s): %u.%06u sec",
                p2p_state_txt(p2p->state), sec, usec);
        eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
        eloop_register_timeout(sec, usec, p2p_state_timeout, p2p, NULL);
}


void p2p_clear_timeout(struct p2p_data *p2p)
{
        p2p_dbg(p2p, "Clear timeout (state=%s)", p2p_state_txt(p2p->state));
        eloop_cancel_timeout(p2p_state_timeout, p2p, NULL);
}


void p2p_go_neg_failed(struct p2p_data *p2p, int status)
{
        struct p2p_go_neg_results res;
        struct p2p_device *peer = p2p->go_neg_peer;

        if (!peer)
                return;

        eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
        if (p2p->state != P2P_SEARCH) {
                /*
                 * Clear timeouts related to GO Negotiation if no new p2p_find
                 * has been started.
                 */
                p2p_clear_timeout(p2p);
                p2p_set_state(p2p, P2P_IDLE);
        }

        peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
        peer->wps_method = WPS_NOT_READY;
        peer->oob_pw_id = 0;
        wpabuf_free(peer->go_neg_conf);
        peer->go_neg_conf = NULL;
        p2p->go_neg_peer = NULL;

        os_memset(&res, 0, sizeof(res));
        res.status = status;
        os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
        os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
        p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
}


static void p2p_listen_in_find(struct p2p_data *p2p, int dev_disc)
{
        unsigned int r, tu;
        int freq;
        struct wpabuf *ies;

        p2p_dbg(p2p, "Starting short listen state (state=%s)",
                p2p_state_txt(p2p->state));

        if (p2p->pending_listen_freq) {
                /* We have a pending p2p_listen request */
                p2p_dbg(p2p, "p2p_listen command pending already");
                return;
        }

        freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
        if (freq < 0) {
                p2p_dbg(p2p, "Unknown regulatory class/channel");
                return;
        }

        if (os_get_random((u8 *) &r, sizeof(r)) < 0)
                r = 0;
        tu = (r % ((p2p->max_disc_int - p2p->min_disc_int) + 1) +
              p2p->min_disc_int) * 100;
        if (p2p->max_disc_tu >= 0 && tu > (unsigned int) p2p->max_disc_tu)
                tu = p2p->max_disc_tu;
        if (!dev_disc && tu < 100)
                tu = 100; /* Need to wait in non-device discovery use cases */
        if (p2p->cfg->max_listen && 1024 * tu / 1000 > p2p->cfg->max_listen)
                tu = p2p->cfg->max_listen * 1000 / 1024;

        if (tu == 0) {
                p2p_dbg(p2p, "Skip listen state since duration was 0 TU");
                p2p_set_timeout(p2p, 0, 0);
                return;
        }

        ies = p2p_build_probe_resp_ies(p2p);
        if (ies == NULL)
                return;

        p2p->pending_listen_freq = freq;
        p2p->pending_listen_sec = 0;
        p2p->pending_listen_usec = 1024 * tu;

        if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, 1024 * tu / 1000,
                    ies) < 0) {
                p2p_dbg(p2p, "Failed to start listen mode");
                p2p->pending_listen_freq = 0;
        }
        wpabuf_free(ies);
}


int p2p_listen(struct p2p_data *p2p, unsigned int timeout)
{
        int freq;
        struct wpabuf *ies;

        p2p_dbg(p2p, "Going to listen(only) state");

        if (p2p->pending_listen_freq) {
                /* We have a pending p2p_listen request */
                p2p_dbg(p2p, "p2p_listen command pending already");
                return -1;
        }

        freq = p2p_channel_to_freq(p2p->cfg->reg_class, p2p->cfg->channel);
        if (freq < 0) {
                p2p_dbg(p2p, "Unknown regulatory class/channel");
                return -1;
        }

        p2p->pending_listen_sec = timeout / 1000;
        p2p->pending_listen_usec = (timeout % 1000) * 1000;

        if (p2p->p2p_scan_running) {
                if (p2p->start_after_scan == P2P_AFTER_SCAN_CONNECT) {
                        p2p_dbg(p2p, "p2p_scan running - connect is already pending - skip listen");
                        return 0;
                }
                p2p_dbg(p2p, "p2p_scan running - delay start of listen state");
                p2p->start_after_scan = P2P_AFTER_SCAN_LISTEN;
                return 0;
        }

        ies = p2p_build_probe_resp_ies(p2p);
        if (ies == NULL)
                return -1;

        p2p->pending_listen_freq = freq;

        if (p2p->cfg->start_listen(p2p->cfg->cb_ctx, freq, timeout, ies) < 0) {
                p2p_dbg(p2p, "Failed to start listen mode");
                p2p->pending_listen_freq = 0;
                wpabuf_free(ies);
                return -1;
        }
        wpabuf_free(ies);

        p2p_set_state(p2p, P2P_LISTEN_ONLY);

        return 0;
}


static void p2p_device_clear_reported(struct p2p_data *p2p)
{
        struct p2p_device *dev;
        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                dev->flags &= ~P2P_DEV_REPORTED;
                dev->sd_reqs = 0;
        }
}


/**
 * p2p_get_device - Fetch a peer entry
 * @p2p: P2P module context from p2p_init()
 * @addr: P2P Device Address of the peer
 * Returns: Pointer to the device entry or %NULL if not found
 */
struct p2p_device * p2p_get_device(struct p2p_data *p2p, const u8 *addr)
{
        struct p2p_device *dev;
        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                if (os_memcmp(dev->info.p2p_device_addr, addr, ETH_ALEN) == 0)
                        return dev;
        }
        return NULL;
}


/**
 * p2p_get_device_interface - Fetch a peer entry based on P2P Interface Address
 * @p2p: P2P module context from p2p_init()
 * @addr: P2P Interface Address of the peer
 * Returns: Pointer to the device entry or %NULL if not found
 */
struct p2p_device * p2p_get_device_interface(struct p2p_data *p2p,
                                             const u8 *addr)
{
        struct p2p_device *dev;
        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                if (os_memcmp(dev->interface_addr, addr, ETH_ALEN) == 0)
                        return dev;
        }
        return NULL;
}


/**
 * p2p_create_device - Create a peer entry
 * @p2p: P2P module context from p2p_init()
 * @addr: P2P Device Address of the peer
 * Returns: Pointer to the device entry or %NULL on failure
 *
 * If there is already an entry for the peer, it will be returned instead of
 * creating a new one.
 */
static struct p2p_device * p2p_create_device(struct p2p_data *p2p,
                                             const u8 *addr)
{
        struct p2p_device *dev, *oldest = NULL;
        size_t count = 0;

        dev = p2p_get_device(p2p, addr);
        if (dev)
                return dev;

        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                count++;
                if (oldest == NULL ||
                    os_reltime_before(&dev->last_seen, &oldest->last_seen))
                        oldest = dev;
        }
        if (count + 1 > p2p->cfg->max_peers && oldest) {
                p2p_dbg(p2p, "Remove oldest peer entry to make room for a new peer");
                dl_list_del(&oldest->list);
                p2p_device_free(p2p, oldest);
        }

        dev = os_zalloc(sizeof(*dev));
        if (dev == NULL)
                return NULL;
        dl_list_add(&p2p->devices, &dev->list);
        os_memcpy(dev->info.p2p_device_addr, addr, ETH_ALEN);

        return dev;
}


static void p2p_copy_client_info(struct p2p_device *dev,
                                 struct p2p_client_info *cli)
{
        os_memcpy(dev->info.device_name, cli->dev_name, cli->dev_name_len);
        dev->info.device_name[cli->dev_name_len] = '\0';
        dev->info.dev_capab = cli->dev_capab;
        dev->info.config_methods = cli->config_methods;
        os_memcpy(dev->info.pri_dev_type, cli->pri_dev_type, 8);
        dev->info.wps_sec_dev_type_list_len = 8 * cli->num_sec_dev_types;
        os_memcpy(dev->info.wps_sec_dev_type_list, cli->sec_dev_types,
                  dev->info.wps_sec_dev_type_list_len);
}


static int p2p_add_group_clients(struct p2p_data *p2p, const u8 *go_dev_addr,
                                 const u8 *go_interface_addr, int freq,
                                 const u8 *gi, size_t gi_len)
{
        struct p2p_group_info info;
        size_t c;
        struct p2p_device *dev;

        if (gi == NULL)
                return 0;

        if (p2p_group_info_parse(gi, gi_len, &info) < 0)
                return -1;

        /*
         * Clear old data for this group; if the devices are still in the
         * group, the information will be restored in the loop following this.
         */
        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                if (os_memcmp(dev->member_in_go_iface, go_interface_addr,
                              ETH_ALEN) == 0) {
                        os_memset(dev->member_in_go_iface, 0, ETH_ALEN);
                        os_memset(dev->member_in_go_dev, 0, ETH_ALEN);
                }
        }

        for (c = 0; c < info.num_clients; c++) {
                struct p2p_client_info *cli = &info.client[c];
                if (os_memcmp(cli->p2p_device_addr, p2p->cfg->dev_addr,
                              ETH_ALEN) == 0)
                        continue; /* ignore our own entry */
                dev = p2p_get_device(p2p, cli->p2p_device_addr);
                if (dev) {
                        if (dev->flags & (P2P_DEV_GROUP_CLIENT_ONLY |
                                          P2P_DEV_PROBE_REQ_ONLY)) {
                                /*
                                 * Update information since we have not
                                 * received this directly from the client.
                                 */
                                p2p_copy_client_info(dev, cli);
                        } else {
                                /*
                                 * Need to update P2P Client Discoverability
                                 * flag since it is valid only in P2P Group
                                 * Info attribute.
                                 */
                                dev->info.dev_capab &=
                                        ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
                                dev->info.dev_capab |=
                                        cli->dev_capab &
                                        P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
                        }
                        if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
                                dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
                        }
                } else {
                        dev = p2p_create_device(p2p, cli->p2p_device_addr);
                        if (dev == NULL)
                                continue;
                        dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
                        p2p_copy_client_info(dev, cli);
                        dev->oper_freq = freq;
                        p2p->cfg->dev_found(p2p->cfg->cb_ctx,
                                            dev->info.p2p_device_addr,
                                            &dev->info, 1);
                        dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
                }

                os_memcpy(dev->interface_addr, cli->p2p_interface_addr,
                          ETH_ALEN);
                os_get_reltime(&dev->last_seen);
                os_memcpy(dev->member_in_go_dev, go_dev_addr, ETH_ALEN);
                os_memcpy(dev->member_in_go_iface, go_interface_addr,
                          ETH_ALEN);
        }

        return 0;
}


static void p2p_copy_wps_info(struct p2p_data *p2p, struct p2p_device *dev,
                              int probe_req, const struct p2p_message *msg)
{
        os_memcpy(dev->info.device_name, msg->device_name,
                  sizeof(dev->info.device_name));

        if (msg->manufacturer &&
            msg->manufacturer_len < sizeof(dev->info.manufacturer)) {
                os_memset(dev->info.manufacturer, 0,
                          sizeof(dev->info.manufacturer));
                os_memcpy(dev->info.manufacturer, msg->manufacturer,
                          msg->manufacturer_len);
        }

        if (msg->model_name &&
            msg->model_name_len < sizeof(dev->info.model_name)) {
                os_memset(dev->info.model_name, 0,
                          sizeof(dev->info.model_name));
                os_memcpy(dev->info.model_name, msg->model_name,
                          msg->model_name_len);
        }

        if (msg->model_number &&
            msg->model_number_len < sizeof(dev->info.model_number)) {
                os_memset(dev->info.model_number, 0,
                          sizeof(dev->info.model_number));
                os_memcpy(dev->info.model_number, msg->model_number,
                          msg->model_number_len);
        }

        if (msg->serial_number &&
            msg->serial_number_len < sizeof(dev->info.serial_number)) {
                os_memset(dev->info.serial_number, 0,
                          sizeof(dev->info.serial_number));
                os_memcpy(dev->info.serial_number, msg->serial_number,
                          msg->serial_number_len);
        }

        if (msg->pri_dev_type)
                os_memcpy(dev->info.pri_dev_type, msg->pri_dev_type,
                          sizeof(dev->info.pri_dev_type));
        else if (msg->wps_pri_dev_type)
                os_memcpy(dev->info.pri_dev_type, msg->wps_pri_dev_type,
                          sizeof(dev->info.pri_dev_type));

        if (msg->wps_sec_dev_type_list) {
                os_memcpy(dev->info.wps_sec_dev_type_list,
                          msg->wps_sec_dev_type_list,
                          msg->wps_sec_dev_type_list_len);
                dev->info.wps_sec_dev_type_list_len =
                        msg->wps_sec_dev_type_list_len;
        }

        if (msg->capability) {
                /*
                 * P2P Client Discoverability bit is reserved in all frames
                 * that use this function, so do not change its value here.
                 */
                dev->info.dev_capab &= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
                dev->info.dev_capab |= msg->capability[0] &
                        ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
                dev->info.group_capab = msg->capability[1];
        }

        if (msg->ext_listen_timing) {
                dev->ext_listen_period = WPA_GET_LE16(msg->ext_listen_timing);
                dev->ext_listen_interval =
                        WPA_GET_LE16(msg->ext_listen_timing + 2);
        }

        if (!probe_req) {
                u16 new_config_methods;
                new_config_methods = msg->config_methods ?
                        msg->config_methods : msg->wps_config_methods;
                if (new_config_methods &&
                    dev->info.config_methods != new_config_methods) {
                        p2p_dbg(p2p, "Update peer " MACSTR
                                " config_methods 0x%x -> 0x%x",
                                MAC2STR(dev->info.p2p_device_addr),
                                dev->info.config_methods,
                                new_config_methods);
                        dev->info.config_methods = new_config_methods;
                }
        }
}


static void p2p_update_peer_vendor_elems(struct p2p_device *dev, const u8 *ies,
                                         size_t ies_len)
{
        const u8 *pos, *end;
        u8 id, len;

        wpabuf_free(dev->info.vendor_elems);
        dev->info.vendor_elems = NULL;

        end = ies + ies_len;

        for (pos = ies; pos + 1 < end; pos += len) {
                id = *pos++;
                len = *pos++;

                if (pos + len > end)
                        break;

                if (id != WLAN_EID_VENDOR_SPECIFIC || len < 3)
                        continue;

                if (len >= 4) {
                        u32 type = WPA_GET_BE32(pos);

                        if (type == WPA_IE_VENDOR_TYPE ||
                            type == WMM_IE_VENDOR_TYPE ||
                            type == WPS_IE_VENDOR_TYPE ||
                            type == P2P_IE_VENDOR_TYPE ||
                            type == WFD_IE_VENDOR_TYPE)
                                continue;
                }

                /* Unknown vendor element - make raw IE data available */
                if (wpabuf_resize(&dev->info.vendor_elems, 2 + len) < 0)
                        break;
                wpabuf_put_data(dev->info.vendor_elems, pos - 2, 2 + len);
        }
}


static int p2p_compare_wfd_info(struct p2p_device *dev,
                              const struct p2p_message *msg)
{
        if (dev->info.wfd_subelems && msg->wfd_subelems) {
                if (dev->info.wfd_subelems->used != msg->wfd_subelems->used)
                        return 1;

                return os_memcmp(dev->info.wfd_subelems->buf,
                                 msg->wfd_subelems->buf,
                                 dev->info.wfd_subelems->used);
        }
        if (dev->info.wfd_subelems || msg->wfd_subelems)
                return 1;

        return 0;
}


/**
 * p2p_add_device - Add peer entries based on scan results or P2P frames
 * @p2p: P2P module context from p2p_init()
 * @addr: Source address of Beacon or Probe Response frame (may be either
 *      P2P Device Address or P2P Interface Address)
 * @level: Signal level (signal strength of the received frame from the peer)
 * @freq: Frequency on which the Beacon or Probe Response frame was received
 * @rx_time: Time when the result was received
 * @ies: IEs from the Beacon or Probe Response frame
 * @ies_len: Length of ies buffer in octets
 * @scan_res: Whether this was based on scan results
 * Returns: 0 on success, -1 on failure
 *
 * If the scan result is for a GO, the clients in the group will also be added
 * to the peer table. This function can also be used with some other frames
 * like Provision Discovery Request that contains P2P Capability and P2P Device
 * Info attributes.
 */
int p2p_add_device(struct p2p_data *p2p, const u8 *addr, int freq,
                   struct os_reltime *rx_time, int level, const u8 *ies,
                   size_t ies_len, int scan_res)
{
        struct p2p_device *dev;
        struct p2p_message msg;
        const u8 *p2p_dev_addr;
        int wfd_changed;
        int i;
        struct os_reltime time_now;

        os_memset(&msg, 0, sizeof(msg));
        if (p2p_parse_ies(ies, ies_len, &msg)) {
                p2p_dbg(p2p, "Failed to parse P2P IE for a device entry");
                p2p_parse_free(&msg);
                return -1;
        }

        if (msg.p2p_device_addr)
                p2p_dev_addr = msg.p2p_device_addr;
        else if (msg.device_id)
                p2p_dev_addr = msg.device_id;
        else {
                p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
                p2p_parse_free(&msg);
                return -1;
        }

        if (!is_zero_ether_addr(p2p->peer_filter) &&
            os_memcmp(p2p_dev_addr, p2p->peer_filter, ETH_ALEN) != 0) {
                p2p_dbg(p2p, "Do not add peer filter for " MACSTR
                        " due to peer filter", MAC2STR(p2p_dev_addr));
                p2p_parse_free(&msg);
                return 0;
        }

        dev = p2p_create_device(p2p, p2p_dev_addr);
        if (dev == NULL) {
                p2p_parse_free(&msg);
                return -1;
        }

        if (rx_time == NULL) {
                os_get_reltime(&time_now);
                rx_time = &time_now;
        }

        /*
         * Update the device entry only if the new peer
         * entry is newer than the one previously stored.
         */
        if (dev->last_seen.sec > 0 &&
            os_reltime_before(rx_time, &dev->last_seen)) {
                p2p_dbg(p2p, "Do not update peer entry based on old frame (rx_time=%u.%06u last_seen=%u.%06u)",
                        (unsigned int) rx_time->sec,
                        (unsigned int) rx_time->usec,
                        (unsigned int) dev->last_seen.sec,
                        (unsigned int) dev->last_seen.usec);
                p2p_parse_free(&msg);
                return -1;
        }

        os_memcpy(&dev->last_seen, rx_time, sizeof(struct os_reltime));

        dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);

        if (os_memcmp(addr, p2p_dev_addr, ETH_ALEN) != 0)
                os_memcpy(dev->interface_addr, addr, ETH_ALEN);
        if (msg.ssid &&
            (msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
             os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
             != 0)) {
                os_memcpy(dev->oper_ssid, msg.ssid + 2, msg.ssid[1]);
                dev->oper_ssid_len = msg.ssid[1];
        }

        if (freq >= 2412 && freq <= 2484 && msg.ds_params &&
            *msg.ds_params >= 1 && *msg.ds_params <= 14) {
                int ds_freq;
                if (*msg.ds_params == 14)
                        ds_freq = 2484;
                else
                        ds_freq = 2407 + *msg.ds_params * 5;
                if (freq != ds_freq) {
                        p2p_dbg(p2p, "Update Listen frequency based on DS Parameter Set IE: %d -> %d MHz",
                                freq, ds_freq);
                        freq = ds_freq;
                }
        }

        if (dev->listen_freq && dev->listen_freq != freq && scan_res) {
                p2p_dbg(p2p, "Update Listen frequency based on scan results ("
                        MACSTR " %d -> %d MHz (DS param %d)",
                        MAC2STR(dev->info.p2p_device_addr), dev->listen_freq,
                        freq, msg.ds_params ? *msg.ds_params : -1);
        }
        if (scan_res) {
                dev->listen_freq = freq;
                if (msg.group_info)
                        dev->oper_freq = freq;
        }
        dev->info.level = level;

        p2p_copy_wps_info(p2p, dev, 0, &msg);

        for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
                wpabuf_free(dev->info.wps_vendor_ext[i]);
                dev->info.wps_vendor_ext[i] = NULL;
        }

        for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
                if (msg.wps_vendor_ext[i] == NULL)
                        break;
                dev->info.wps_vendor_ext[i] = wpabuf_alloc_copy(
                        msg.wps_vendor_ext[i], msg.wps_vendor_ext_len[i]);
                if (dev->info.wps_vendor_ext[i] == NULL)
                        break;
        }

        wfd_changed = p2p_compare_wfd_info(dev, &msg);

        if (msg.wfd_subelems) {
                wpabuf_free(dev->info.wfd_subelems);
                dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
        }

        if (scan_res) {
                p2p_add_group_clients(p2p, p2p_dev_addr, addr, freq,
                                      msg.group_info, msg.group_info_len);
        }

        p2p_parse_free(&msg);

        p2p_update_peer_vendor_elems(dev, ies, ies_len);

        if (dev->flags & P2P_DEV_REPORTED && !wfd_changed)
                return 0;

        p2p_dbg(p2p, "Peer found with Listen frequency %d MHz (rx_time=%u.%06u)",
                freq, (unsigned int) rx_time->sec,
                (unsigned int) rx_time->usec);
        if (dev->flags & P2P_DEV_USER_REJECTED) {
                p2p_dbg(p2p, "Do not report rejected device");
                return 0;
        }

        if (dev->info.config_methods == 0 &&
            (freq == 2412 || freq == 2437 || freq == 2462)) {
                /*
                 * If we have only seen a Beacon frame from a GO, we do not yet
                 * know what WPS config methods it supports. Since some
                 * applications use config_methods value from P2P-DEVICE-FOUND
                 * events, postpone reporting this peer until we've fully
                 * discovered its capabilities.
                 *
                 * At least for now, do this only if the peer was detected on
                 * one of the social channels since that peer can be easily be
                 * found again and there are no limitations of having to use
                 * passive scan on this channels, so this can be done through
                 * Probe Response frame that includes the config_methods
                 * information.
                 */
                p2p_dbg(p2p, "Do not report peer " MACSTR
                        " with unknown config methods", MAC2STR(addr));
                return 0;
        }

        p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
                            !(dev->flags & P2P_DEV_REPORTED_ONCE));
        dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;

        return 0;
}


static void p2p_device_free(struct p2p_data *p2p, struct p2p_device *dev)
{
        int i;

        if (p2p->go_neg_peer == dev) {
                /*
                 * If GO Negotiation is in progress, report that it has failed.
                 */
                p2p_go_neg_failed(p2p, -1);
        }
        if (p2p->invite_peer == dev)
                p2p->invite_peer = NULL;
        if (p2p->sd_peer == dev)
                p2p->sd_peer = NULL;
        if (p2p->pending_client_disc_go == dev)
                p2p->pending_client_disc_go = NULL;

        /* dev_lost() device, but only if it was previously dev_found() */
        if (dev->flags & P2P_DEV_REPORTED_ONCE)
                p2p->cfg->dev_lost(p2p->cfg->cb_ctx,
                                   dev->info.p2p_device_addr);

        for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
                wpabuf_free(dev->info.wps_vendor_ext[i]);
                dev->info.wps_vendor_ext[i] = NULL;
        }

        wpabuf_free(dev->info.wfd_subelems);
        wpabuf_free(dev->info.vendor_elems);
        wpabuf_free(dev->go_neg_conf);

        os_free(dev);
}


static int p2p_get_next_prog_freq(struct p2p_data *p2p)
{
        struct p2p_channels *c;
        struct p2p_reg_class *cla;
        size_t cl, ch;
        int found = 0;
        u8 reg_class;
        u8 channel;
        int freq;

        c = &p2p->cfg->channels;
        for (cl = 0; cl < c->reg_classes; cl++) {
                cla = &c->reg_class[cl];
                if (cla->reg_class != p2p->last_prog_scan_class)
                        continue;
                for (ch = 0; ch < cla->channels; ch++) {
                        if (cla->channel[ch] == p2p->last_prog_scan_chan) {
                                found = 1;
                                break;
                        }
                }
                if (found)
                        break;
        }

        if (!found) {
                /* Start from beginning */
                reg_class = c->reg_class[0].reg_class;
                channel = c->reg_class[0].channel[0];
        } else {
                /* Pick the next channel */
                ch++;
                if (ch == cla->channels) {
                        cl++;
                        if (cl == c->reg_classes)
                                cl = 0;
                        ch = 0;
                }
                reg_class = c->reg_class[cl].reg_class;
                channel = c->reg_class[cl].channel[ch];
        }

        freq = p2p_channel_to_freq(reg_class, channel);
        p2p_dbg(p2p, "Next progressive search channel: reg_class %u channel %u -> %d MHz",
                reg_class, channel, freq);
        p2p->last_prog_scan_class = reg_class;
        p2p->last_prog_scan_chan = channel;

        if (freq == 2412 || freq == 2437 || freq == 2462)
                return 0; /* No need to add social channels */
        return freq;
}


static void p2p_search(struct p2p_data *p2p)
{
        int freq = 0;
        enum p2p_scan_type type;
        u16 pw_id = DEV_PW_DEFAULT;
        int res;

        if (p2p->drv_in_listen) {
                p2p_dbg(p2p, "Driver is still in Listen state - wait for it to end before continuing");
                return;
        }
        p2p->cfg->stop_listen(p2p->cfg->cb_ctx);

        if (p2p->find_type == P2P_FIND_PROGRESSIVE &&
            (freq = p2p_get_next_prog_freq(p2p)) > 0) {
                type = P2P_SCAN_SOCIAL_PLUS_ONE;
                p2p_dbg(p2p, "Starting search (+ freq %u)", freq);
        } else {
                type = P2P_SCAN_SOCIAL;
                p2p_dbg(p2p, "Starting search");
        }

        res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, type, freq,
                                 p2p->num_req_dev_types, p2p->req_dev_types,
                                 p2p->find_dev_id, pw_id);
        if (res < 0) {
                p2p_dbg(p2p, "Scan request schedule failed");
                p2p_continue_find(p2p);
        }
}


static void p2p_find_timeout(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;
        p2p_dbg(p2p, "Find timeout -> stop");
        p2p_stop_find(p2p);
}


void p2p_notify_scan_trigger_status(struct p2p_data *p2p, int status)
{
        if (status != 0) {
                p2p_dbg(p2p, "Scan request failed");
                /* Do continue find even for the first p2p_find_scan */
                p2p_continue_find(p2p);
        } else {
                p2p_dbg(p2p, "Running p2p_scan");
                p2p->p2p_scan_running = 1;
                eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
                eloop_register_timeout(P2P_SCAN_TIMEOUT, 0, p2p_scan_timeout,
                                       p2p, NULL);
        }
}


static int p2p_run_after_scan(struct p2p_data *p2p)
{
        struct p2p_device *dev;
        enum p2p_after_scan op;

        if (p2p->after_scan_tx) {
                p2p->after_scan_tx_in_progress = 1;
                p2p_dbg(p2p, "Send pending Action frame at p2p_scan completion");
                p2p->cfg->send_action(p2p->cfg->cb_ctx,
                                      p2p->after_scan_tx->freq,
                                      p2p->after_scan_tx->dst,
                                      p2p->after_scan_tx->src,
                                      p2p->after_scan_tx->bssid,
                                      (u8 *) (p2p->after_scan_tx + 1),
                                      p2p->after_scan_tx->len,
                                      p2p->after_scan_tx->wait_time);
                os_free(p2p->after_scan_tx);
                p2p->after_scan_tx = NULL;
                return 1;
        }

        op = p2p->start_after_scan;
        p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
        switch (op) {
        case P2P_AFTER_SCAN_NOTHING:
                break;
        case P2P_AFTER_SCAN_LISTEN:
                p2p_dbg(p2p, "Start previously requested Listen state");
                p2p_listen(p2p, p2p->pending_listen_sec * 1000 +
                           p2p->pending_listen_usec / 1000);
                return 1;
        case P2P_AFTER_SCAN_CONNECT:
                p2p_dbg(p2p, "Start previously requested connect with " MACSTR,
                        MAC2STR(p2p->after_scan_peer));
                dev = p2p_get_device(p2p, p2p->after_scan_peer);
                if (dev == NULL) {
                        p2p_dbg(p2p, "Peer not known anymore");
                        break;
                }
                p2p_connect_send(p2p, dev);
                return 1;
        }

        return 0;
}


static void p2p_scan_timeout(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;
        int running;
        p2p_dbg(p2p, "p2p_scan timeout (running=%d)", p2p->p2p_scan_running);
        running = p2p->p2p_scan_running;
        /* Make sure we recover from missed scan results callback */
        p2p->p2p_scan_running = 0;

        if (running)
                p2p_run_after_scan(p2p);
}


static void p2p_free_req_dev_types(struct p2p_data *p2p)
{
        p2p->num_req_dev_types = 0;
        os_free(p2p->req_dev_types);
        p2p->req_dev_types = NULL;
}


static int p2ps_gen_hash(struct p2p_data *p2p, const char *str, u8 *hash)
{
        u8 buf[SHA256_MAC_LEN];
        char str_buf[256];
        const u8 *adv_array;
        size_t i, adv_len;

        if (!str || !hash)
                return 0;

        if (!str[0]) {
                os_memcpy(hash, p2p->wild_card_hash, P2PS_HASH_LEN);
                return 1;
        }

        adv_array = (u8 *) str_buf;
        adv_len = os_strlen(str);

        for (i = 0; str[i] && i < adv_len; i++) {
                if (str[i] >= 'A' && str[i] <= 'Z')
                        str_buf[i] = str[i] - 'A' + 'a';
                else
                        str_buf[i] = str[i];
        }

        if (sha256_vector(1, &adv_array, &adv_len, buf))
                return 0;

        os_memcpy(hash, buf, P2PS_HASH_LEN);
        return 1;
}


int p2p_find(struct p2p_data *p2p, unsigned int timeout,
             enum p2p_discovery_type type,
             unsigned int num_req_dev_types, const u8 *req_dev_types,
             const u8 *dev_id, unsigned int search_delay,
             u8 seek_count, const char **seek)
{
        int res;

        p2p_dbg(p2p, "Starting find (type=%d)", type);
        os_get_reltime(&p2p->find_start);
        if (p2p->p2p_scan_running) {
                p2p_dbg(p2p, "p2p_scan is already running");
        }

        p2p_free_req_dev_types(p2p);
        if (req_dev_types && num_req_dev_types) {
                p2p->req_dev_types = os_malloc(num_req_dev_types *
                                               WPS_DEV_TYPE_LEN);
                if (p2p->req_dev_types == NULL)
                        return -1;
                os_memcpy(p2p->req_dev_types, req_dev_types,
                          num_req_dev_types * WPS_DEV_TYPE_LEN);
                p2p->num_req_dev_types = num_req_dev_types;
        }

        if (dev_id) {
                os_memcpy(p2p->find_dev_id_buf, dev_id, ETH_ALEN);
                p2p->find_dev_id = p2p->find_dev_id_buf;
        } else
                p2p->find_dev_id = NULL;

        if (seek_count == 0 || !seek) {
                /* Not an ASP search */
                p2p->p2ps_seek = 0;
        } else if (seek_count == 1 && seek && (!seek[0] || !seek[0][0])) {
                /*
                 * An empty seek string means no hash values, but still an ASP
                 * search.
                 */
                p2p->p2ps_seek_count = 0;
                p2p->p2ps_seek = 1;
        } else if (seek && seek_count <= P2P_MAX_QUERY_HASH) {
                u8 buf[P2PS_HASH_LEN];
                int i;

                p2p->p2ps_seek_count = seek_count;
                for (i = 0; i < seek_count; i++) {
                        if (!p2ps_gen_hash(p2p, seek[i], buf))
                                continue;

                        /* If asking for wildcard, don't do others */
                        if (os_memcmp(buf, p2p->wild_card_hash,
                                      P2PS_HASH_LEN) == 0) {
                                p2p->p2ps_seek_count = 0;
                                break;
                        }

                        os_memcpy(&p2p->query_hash[i * P2PS_HASH_LEN], buf,
                                  P2PS_HASH_LEN);
                }
                p2p->p2ps_seek = 1;
        } else {
                p2p->p2ps_seek_count = 0;
                p2p->p2ps_seek = 1;
        }

        /* Special case to perform wildcard search */
        if (p2p->p2ps_seek_count == 0 && p2p->p2ps_seek) {
                p2p->p2ps_seek_count = 1;
                os_memcpy(&p2p->query_hash, p2p->wild_card_hash, P2PS_HASH_LEN);
        }

        p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
        p2p_clear_timeout(p2p);
        p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
        p2p->find_type = type;
        p2p_device_clear_reported(p2p);
        p2p_set_state(p2p, P2P_SEARCH);
        p2p->search_delay = search_delay;
        p2p->in_search_delay = 0;
        eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
        p2p->last_p2p_find_timeout = timeout;
        if (timeout)
                eloop_register_timeout(timeout, 0, p2p_find_timeout,
                                       p2p, NULL);
        switch (type) {
        case P2P_FIND_START_WITH_FULL:
        case P2P_FIND_PROGRESSIVE:
                res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_FULL, 0,
                                         p2p->num_req_dev_types,
                                         p2p->req_dev_types, dev_id,
                                         DEV_PW_DEFAULT);
                break;
        case P2P_FIND_ONLY_SOCIAL:
                res = p2p->cfg->p2p_scan(p2p->cfg->cb_ctx, P2P_SCAN_SOCIAL, 0,
                                         p2p->num_req_dev_types,
                                         p2p->req_dev_types, dev_id,
                                         DEV_PW_DEFAULT);
                break;
        default:
                return -1;
        }

        if (res != 0 && p2p->p2p_scan_running) {
                p2p_dbg(p2p, "Failed to start p2p_scan - another p2p_scan was already running");
                /* wait for the previous p2p_scan to complete */
                res = 0; /* do not report failure */
        } else if (res != 0) {
                p2p_dbg(p2p, "Failed to start p2p_scan");
                p2p_set_state(p2p, P2P_IDLE);
                eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
        }

        return res;
}


void p2p_stop_find_for_freq(struct p2p_data *p2p, int freq)
{
        p2p_dbg(p2p, "Stopping find");
        eloop_cancel_timeout(p2p_find_timeout, p2p, NULL);
        p2p_clear_timeout(p2p);
        if (p2p->state == P2P_SEARCH)
                p2p->cfg->find_stopped(p2p->cfg->cb_ctx);

        p2p->p2ps_seek_count = 0;

        p2p_set_state(p2p, P2P_IDLE);
        p2p_free_req_dev_types(p2p);
        p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;
        if (p2p->go_neg_peer)
                p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE;
        p2p->go_neg_peer = NULL;
        p2p->sd_peer = NULL;
        p2p->invite_peer = NULL;
        p2p_stop_listen_for_freq(p2p, freq);
}


void p2p_stop_listen_for_freq(struct p2p_data *p2p, int freq)
{
        if (freq > 0 && p2p->drv_in_listen == freq && p2p->in_listen) {
                p2p_dbg(p2p, "Skip stop_listen since we are on correct channel for response");
                return;
        }
        if (p2p->in_listen) {
                p2p->in_listen = 0;
                p2p_clear_timeout(p2p);
        }
        if (p2p->drv_in_listen) {
                /*
                 * The driver may not deliver callback to p2p_listen_end()
                 * when the operation gets canceled, so clear the internal
                 * variable that is tracking driver state.
                 */
                p2p_dbg(p2p, "Clear drv_in_listen (%d)", p2p->drv_in_listen);
                p2p->drv_in_listen = 0;
        }
        p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
}


void p2p_stop_listen(struct p2p_data *p2p)
{
        if (p2p->state != P2P_LISTEN_ONLY) {
                p2p_dbg(p2p, "Skip stop_listen since not in listen_only state.");
                return;
        }

        p2p_stop_listen_for_freq(p2p, 0);
        p2p_set_state(p2p, P2P_IDLE);
}


void p2p_stop_find(struct p2p_data *p2p)
{
        p2p->pending_listen_freq = 0;
        p2p_stop_find_for_freq(p2p, 0);
}


static int p2p_prepare_channel_pref(struct p2p_data *p2p,
                                    unsigned int force_freq,
                                    unsigned int pref_freq, int go)
{
        u8 op_class, op_channel;
        unsigned int freq = force_freq ? force_freq : pref_freq;

        p2p_dbg(p2p, "Prepare channel pref - force_freq=%u pref_freq=%u go=%d",
                force_freq, pref_freq, go);
        if (p2p_freq_to_channel(freq, &op_class, &op_channel) < 0) {
                p2p_dbg(p2p, "Unsupported frequency %u MHz", freq);
                return -1;
        }

        if (!p2p_channels_includes(&p2p->cfg->channels, op_class, op_channel) &&
            (go || !p2p_channels_includes(&p2p->cfg->cli_channels, op_class,
                                          op_channel))) {
                p2p_dbg(p2p, "Frequency %u MHz (oper_class %u channel %u) not allowed for P2P",
                        freq, op_class, op_channel);
                return -1;
        }

        p2p->op_reg_class = op_class;
        p2p->op_channel = op_channel;

        if (force_freq) {
                p2p->channels.reg_classes = 1;
                p2p->channels.reg_class[0].channels = 1;
                p2p->channels.reg_class[0].reg_class = p2p->op_reg_class;
                p2p->channels.reg_class[0].channel[0] = p2p->op_channel;
        } else {
                os_memcpy(&p2p->channels, &p2p->cfg->channels,
                          sizeof(struct p2p_channels));
        }

        return 0;
}


static void p2p_prepare_channel_best(struct p2p_data *p2p)
{
        u8 op_class, op_channel;
        const int op_classes_5ghz[] = { 124, 115, 0 };
        const int op_classes_ht40[] = { 126, 127, 116, 117, 0 };
        const int op_classes_vht[] = { 128, 0 };

        p2p_dbg(p2p, "Prepare channel best");

        if (!p2p->cfg->cfg_op_channel && p2p->best_freq_overall > 0 &&
            p2p_supported_freq(p2p, p2p->best_freq_overall) &&
            p2p_freq_to_channel(p2p->best_freq_overall, &op_class, &op_channel)
            == 0) {
                p2p_dbg(p2p, "Select best overall channel as operating channel preference");
                p2p->op_reg_class = op_class;
                p2p->op_channel = op_channel;
        } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_5 > 0 &&
                   p2p_supported_freq(p2p, p2p->best_freq_5) &&
                   p2p_freq_to_channel(p2p->best_freq_5, &op_class, &op_channel)
                   == 0) {
                p2p_dbg(p2p, "Select best 5 GHz channel as operating channel preference");
                p2p->op_reg_class = op_class;
                p2p->op_channel = op_channel;
        } else if (!p2p->cfg->cfg_op_channel && p2p->best_freq_24 > 0 &&
                   p2p_supported_freq(p2p, p2p->best_freq_24) &&
                   p2p_freq_to_channel(p2p->best_freq_24, &op_class,
                                       &op_channel) == 0) {
                p2p_dbg(p2p, "Select best 2.4 GHz channel as operating channel preference");
                p2p->op_reg_class = op_class;
                p2p->op_channel = op_channel;
        } else if (p2p->cfg->num_pref_chan > 0 &&
                   p2p_channels_includes(&p2p->cfg->channels,
                                         p2p->cfg->pref_chan[0].op_class,
                                         p2p->cfg->pref_chan[0].chan)) {
                p2p_dbg(p2p, "Select first pref_chan entry as operating channel preference");
                p2p->op_reg_class = p2p->cfg->pref_chan[0].op_class;
                p2p->op_channel = p2p->cfg->pref_chan[0].chan;
        } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_vht,
                                      &p2p->op_reg_class, &p2p->op_channel) ==
                   0) {
                p2p_dbg(p2p, "Select possible VHT channel (op_class %u channel %u) as operating channel preference",
                        p2p->op_reg_class, p2p->op_channel);
        } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_ht40,
                                      &p2p->op_reg_class, &p2p->op_channel) ==
                   0) {
                p2p_dbg(p2p, "Select possible HT40 channel (op_class %u channel %u) as operating channel preference",
                        p2p->op_reg_class, p2p->op_channel);
        } else if (p2p_channel_select(&p2p->cfg->channels, op_classes_5ghz,
                                      &p2p->op_reg_class, &p2p->op_channel) ==
                   0) {
                p2p_dbg(p2p, "Select possible 5 GHz channel (op_class %u channel %u) as operating channel preference",
                        p2p->op_reg_class, p2p->op_channel);
        } else if (p2p_channels_includes(&p2p->cfg->channels,
                                         p2p->cfg->op_reg_class,
                                         p2p->cfg->op_channel)) {
                p2p_dbg(p2p, "Select pre-configured channel as operating channel preference");
                p2p->op_reg_class = p2p->cfg->op_reg_class;
                p2p->op_channel = p2p->cfg->op_channel;
        } else if (p2p_channel_random_social(&p2p->cfg->channels,
                                             &p2p->op_reg_class,
                                             &p2p->op_channel) == 0) {
                p2p_dbg(p2p, "Select random available social channel (op_class %u channel %u) as operating channel preference",
                        p2p->op_reg_class, p2p->op_channel);
        } else {
                /* Select any random available channel from the first available
                 * operating class */
                p2p_channel_select(&p2p->cfg->channels, NULL,
                                   &p2p->op_reg_class,
                                   &p2p->op_channel);
                p2p_dbg(p2p, "Select random available channel %d from operating class %d as operating channel preference",
                        p2p->op_channel, p2p->op_reg_class);
        }

        os_memcpy(&p2p->channels, &p2p->cfg->channels,
                  sizeof(struct p2p_channels));
}


/**
 * p2p_prepare_channel - Select operating channel for GO Negotiation
 * @p2p: P2P module context from p2p_init()
 * @dev: Selected peer device
 * @force_freq: Forced frequency in MHz or 0 if not forced
 * @pref_freq: Preferred frequency in MHz or 0 if no preference
 * @go: Whether the local end will be forced to be GO
 * Returns: 0 on success, -1 on failure (channel not supported for P2P)
 *
 * This function is used to do initial operating channel selection for GO
 * Negotiation prior to having received peer information. The selected channel
 * may be further optimized in p2p_reselect_channel() once the peer information
 * is available.
 */
int p2p_prepare_channel(struct p2p_data *p2p, struct p2p_device *dev,
                        unsigned int force_freq, unsigned int pref_freq, int go)
{
        p2p_dbg(p2p, "Prepare channel - force_freq=%u pref_freq=%u go=%d",
                force_freq, pref_freq, go);
        if (force_freq || pref_freq) {
                if (p2p_prepare_channel_pref(p2p, force_freq, pref_freq, go) <
                    0)
                        return -1;
        } else {
                p2p_prepare_channel_best(p2p);
        }
        p2p_channels_dump(p2p, "prepared channels", &p2p->channels);
        if (go)
                p2p_channels_remove_freqs(&p2p->channels, &p2p->no_go_freq);
        else if (!force_freq)
                p2p_channels_union_inplace(&p2p->channels,
                                           &p2p->cfg->cli_channels);
        p2p_channels_dump(p2p, "after go/cli filter/add", &p2p->channels);

        p2p_dbg(p2p, "Own preference for operation channel: Operating Class %u Channel %u%s",
                p2p->op_reg_class, p2p->op_channel,
                force_freq ? " (forced)" : "");

        if (force_freq)
                dev->flags |= P2P_DEV_FORCE_FREQ;
        else
                dev->flags &= ~P2P_DEV_FORCE_FREQ;

        return 0;
}


static void p2p_set_dev_persistent(struct p2p_device *dev,
                                   int persistent_group)
{
        switch (persistent_group) {
        case 0:
                dev->flags &= ~(P2P_DEV_PREFER_PERSISTENT_GROUP |
                                P2P_DEV_PREFER_PERSISTENT_RECONN);
                break;
        case 1:
                dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP;
                dev->flags &= ~P2P_DEV_PREFER_PERSISTENT_RECONN;
                break;
        case 2:
                dev->flags |= P2P_DEV_PREFER_PERSISTENT_GROUP |
                        P2P_DEV_PREFER_PERSISTENT_RECONN;
                break;
        }
}


int p2p_connect(struct p2p_data *p2p, const u8 *peer_addr,
                enum p2p_wps_method wps_method,
                int go_intent, const u8 *own_interface_addr,
                unsigned int force_freq, int persistent_group,
                const u8 *force_ssid, size_t force_ssid_len,
                int pd_before_go_neg, unsigned int pref_freq, u16 oob_pw_id)
{
        struct p2p_device *dev;

        p2p_dbg(p2p, "Request to start group negotiation - peer=" MACSTR
                "  GO Intent=%d  Intended Interface Address=" MACSTR
                " wps_method=%d persistent_group=%d pd_before_go_neg=%d "
                "oob_pw_id=%u",
                MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
                wps_method, persistent_group, pd_before_go_neg, oob_pw_id);

        dev = p2p_get_device(p2p, peer_addr);
        if (dev == NULL || (dev->flags & P2P_DEV_PROBE_REQ_ONLY)) {
                p2p_dbg(p2p, "Cannot connect to unknown P2P Device " MACSTR,
                        MAC2STR(peer_addr));
                return -1;
        }

        if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq,
                                go_intent == 15) < 0)
                return -1;

        if (dev->flags & P2P_DEV_GROUP_CLIENT_ONLY) {
                if (!(dev->info.dev_capab &
                      P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY)) {
                        p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
                                " that is in a group and is not discoverable",
                                MAC2STR(peer_addr));
                        return -1;
                }
                if (dev->oper_freq <= 0) {
                        p2p_dbg(p2p, "Cannot connect to P2P Device " MACSTR
                                " with incomplete information",
                                MAC2STR(peer_addr));
                        return -1;
                }

                /*
                 * First, try to connect directly. If the peer does not
                 * acknowledge frames, assume it is sleeping and use device
                 * discoverability via the GO at that point.
                 */
        }

        p2p->ssid_set = 0;
        if (force_ssid) {
                wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
                                  force_ssid, force_ssid_len);
                os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
                p2p->ssid_len = force_ssid_len;
                p2p->ssid_set = 1;
        }

        dev->flags &= ~P2P_DEV_NOT_YET_READY;
        dev->flags &= ~P2P_DEV_USER_REJECTED;
        dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
        dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;
        if (pd_before_go_neg)
                dev->flags |= P2P_DEV_PD_BEFORE_GO_NEG;
        else {
                dev->flags &= ~P2P_DEV_PD_BEFORE_GO_NEG;
                /*
                 * Assign dialog token and tie breaker here to use the same
                 * values in each retry within the same GO Negotiation exchange.
                 */
                dev->dialog_token++;
                if (dev->dialog_token == 0)
                        dev->dialog_token = 1;
                dev->tie_breaker = p2p->next_tie_breaker;
                p2p->next_tie_breaker = !p2p->next_tie_breaker;
        }
        dev->connect_reqs = 0;
        dev->go_neg_req_sent = 0;
        dev->go_state = UNKNOWN_GO;
        p2p_set_dev_persistent(dev, persistent_group);
        p2p->go_intent = go_intent;
        os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);

        if (p2p->state != P2P_IDLE)
                p2p_stop_find(p2p);

        if (p2p->after_scan_tx) {
                /*
                 * We need to drop the pending frame to avoid issues with the
                 * new GO Negotiation, e.g., when the pending frame was from a
                 * previous attempt at starting a GO Negotiation.
                 */
                p2p_dbg(p2p, "Dropped previous pending Action frame TX that was waiting for p2p_scan completion");
                os_free(p2p->after_scan_tx);
                p2p->after_scan_tx = NULL;
        }

        dev->wps_method = wps_method;
        dev->oob_pw_id = oob_pw_id;
        dev->status = P2P_SC_SUCCESS;

        if (p2p->p2p_scan_running) {
                p2p_dbg(p2p, "p2p_scan running - delay connect send");
                p2p->start_after_scan = P2P_AFTER_SCAN_CONNECT;
                os_memcpy(p2p->after_scan_peer, peer_addr, ETH_ALEN);
                return 0;
        }
        p2p->start_after_scan = P2P_AFTER_SCAN_NOTHING;

        return p2p_connect_send(p2p, dev);
}


int p2p_authorize(struct p2p_data *p2p, const u8 *peer_addr,
                  enum p2p_wps_method wps_method,
                  int go_intent, const u8 *own_interface_addr,
                  unsigned int force_freq, int persistent_group,
                  const u8 *force_ssid, size_t force_ssid_len,
                  unsigned int pref_freq, u16 oob_pw_id)
{
        struct p2p_device *dev;

        p2p_dbg(p2p, "Request to authorize group negotiation - peer=" MACSTR
                "  GO Intent=%d  Intended Interface Address=" MACSTR
                " wps_method=%d  persistent_group=%d oob_pw_id=%u",
                MAC2STR(peer_addr), go_intent, MAC2STR(own_interface_addr),
                wps_method, persistent_group, oob_pw_id);

        dev = p2p_get_device(p2p, peer_addr);
        if (dev == NULL) {
                p2p_dbg(p2p, "Cannot authorize unknown P2P Device " MACSTR,
                        MAC2STR(peer_addr));
                return -1;
        }

        if (p2p_prepare_channel(p2p, dev, force_freq, pref_freq, go_intent ==
                                15) < 0)
                return -1;

        p2p->ssid_set = 0;
        if (force_ssid) {
                wpa_hexdump_ascii(MSG_DEBUG, "P2P: Forced SSID",
                                  force_ssid, force_ssid_len);
                os_memcpy(p2p->ssid, force_ssid, force_ssid_len);
                p2p->ssid_len = force_ssid_len;
                p2p->ssid_set = 1;
        }

        dev->flags &= ~P2P_DEV_NOT_YET_READY;
        dev->flags &= ~P2P_DEV_USER_REJECTED;
        dev->go_neg_req_sent = 0;
        dev->go_state = UNKNOWN_GO;
        p2p_set_dev_persistent(dev, persistent_group);
        p2p->go_intent = go_intent;
        os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);

        dev->wps_method = wps_method;
        dev->oob_pw_id = oob_pw_id;
        dev->status = P2P_SC_SUCCESS;

        return 0;
}


void p2p_add_dev_info(struct p2p_data *p2p, const u8 *addr,
                      struct p2p_device *dev, struct p2p_message *msg)
{
        os_get_reltime(&dev->last_seen);

        p2p_copy_wps_info(p2p, dev, 0, msg);

        if (msg->listen_channel) {
                int freq;
                freq = p2p_channel_to_freq(msg->listen_channel[3],
                                           msg->listen_channel[4]);
                if (freq < 0) {
                        p2p_dbg(p2p, "Unknown peer Listen channel: "
                                "country=%c%c(0x%02x) reg_class=%u channel=%u",
                                msg->listen_channel[0],
                                msg->listen_channel[1],
                                msg->listen_channel[2],
                                msg->listen_channel[3],
                                msg->listen_channel[4]);
                } else {
                        p2p_dbg(p2p, "Update peer " MACSTR
                                " Listen channel: %u -> %u MHz",
                                MAC2STR(dev->info.p2p_device_addr),
                                dev->listen_freq, freq);
                        dev->listen_freq = freq;
                }
        }

        if (msg->wfd_subelems) {
                wpabuf_free(dev->info.wfd_subelems);
                dev->info.wfd_subelems = wpabuf_dup(msg->wfd_subelems);
        }

        if (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
                dev->flags &= ~P2P_DEV_PROBE_REQ_ONLY;
                p2p_dbg(p2p, "Completed device entry based on data from GO Negotiation Request");
        } else {
                p2p_dbg(p2p, "Created device entry based on GO Neg Req: "
                        MACSTR " dev_capab=0x%x group_capab=0x%x name='%s' "
                        "listen_freq=%d",
                        MAC2STR(dev->info.p2p_device_addr),
                        dev->info.dev_capab, dev->info.group_capab,
                        dev->info.device_name, dev->listen_freq);
        }

        dev->flags &= ~P2P_DEV_GROUP_CLIENT_ONLY;

        if (dev->flags & P2P_DEV_USER_REJECTED) {
                p2p_dbg(p2p, "Do not report rejected device");
                return;
        }

        p2p->cfg->dev_found(p2p->cfg->cb_ctx, addr, &dev->info,
                            !(dev->flags & P2P_DEV_REPORTED_ONCE));
        dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
}


void p2p_build_ssid(struct p2p_data *p2p, u8 *ssid, size_t *ssid_len)
{
        os_memcpy(ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);
        p2p_random((char *) &ssid[P2P_WILDCARD_SSID_LEN], 2);
        os_memcpy(&ssid[P2P_WILDCARD_SSID_LEN + 2],
                  p2p->cfg->ssid_postfix, p2p->cfg->ssid_postfix_len);
        *ssid_len = P2P_WILDCARD_SSID_LEN + 2 + p2p->cfg->ssid_postfix_len;
}


int p2p_go_params(struct p2p_data *p2p, struct p2p_go_neg_results *params)
{
        p2p_build_ssid(p2p, params->ssid, &params->ssid_len);
        p2p_random(params->passphrase, p2p->cfg->passphrase_len);
        return 0;
}


void p2p_go_complete(struct p2p_data *p2p, struct p2p_device *peer)
{
        struct p2p_go_neg_results res;
        int go = peer->go_state == LOCAL_GO;
        struct p2p_channels intersection;

        p2p_dbg(p2p, "GO Negotiation with " MACSTR " completed (%s will be GO)",
                MAC2STR(peer->info.p2p_device_addr), go ? "local end" : "peer");

        os_memset(&res, 0, sizeof(res));
        res.role_go = go;
        os_memcpy(res.peer_device_addr, peer->info.p2p_device_addr, ETH_ALEN);
        os_memcpy(res.peer_interface_addr, peer->intended_addr, ETH_ALEN);
        res.wps_method = peer->wps_method;
        if (peer->flags & P2P_DEV_PREFER_PERSISTENT_GROUP) {
                if (peer->flags & P2P_DEV_PREFER_PERSISTENT_RECONN)
                        res.persistent_group = 2;
                else
                        res.persistent_group = 1;
        }

        if (go) {
                /* Setup AP mode for WPS provisioning */
                res.freq = p2p_channel_to_freq(p2p->op_reg_class,
                                               p2p->op_channel);
                os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
                res.ssid_len = p2p->ssid_len;
                p2p_random(res.passphrase, p2p->cfg->passphrase_len);
        } else {
                res.freq = peer->oper_freq;
                if (p2p->ssid_len) {
                        os_memcpy(res.ssid, p2p->ssid, p2p->ssid_len);
                        res.ssid_len = p2p->ssid_len;
                }
        }

        p2p_channels_dump(p2p, "own channels", &p2p->channels);
        p2p_channels_dump(p2p, "peer channels", &peer->channels);
        p2p_channels_intersect(&p2p->channels, &peer->channels,
                               &intersection);
        if (go) {
                p2p_channels_remove_freqs(&intersection, &p2p->no_go_freq);
                p2p_channels_dump(p2p, "intersection after no-GO removal",
                                  &intersection);
        }

        p2p_channels_to_freqs(&intersection, res.freq_list,
                              P2P_MAX_CHANNELS);

        res.peer_config_timeout = go ? peer->client_timeout : peer->go_timeout;

        p2p_clear_timeout(p2p);
        p2p->ssid_set = 0;
        peer->go_neg_req_sent = 0;
        peer->wps_method = WPS_NOT_READY;
        peer->oob_pw_id = 0;
        wpabuf_free(peer->go_neg_conf);
        peer->go_neg_conf = NULL;

        p2p_set_state(p2p, P2P_PROVISIONING);
        p2p->cfg->go_neg_completed(p2p->cfg->cb_ctx, &res);
}


static void p2p_rx_p2p_action(struct p2p_data *p2p, const u8 *sa,
                              const u8 *data, size_t len, int rx_freq)
{
        p2p_dbg(p2p, "RX P2P Public Action from " MACSTR, MAC2STR(sa));
        wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Public Action contents", data, len);

        if (len < 1)
                return;

        switch (data[0]) {
        case P2P_GO_NEG_REQ:
                p2p_process_go_neg_req(p2p, sa, data + 1, len - 1, rx_freq);
                break;
        case P2P_GO_NEG_RESP:
                p2p_process_go_neg_resp(p2p, sa, data + 1, len - 1, rx_freq);
                break;
        case P2P_GO_NEG_CONF:
                p2p_process_go_neg_conf(p2p, sa, data + 1, len - 1);
                break;
        case P2P_INVITATION_REQ:
                p2p_process_invitation_req(p2p, sa, data + 1, len - 1,
                                           rx_freq);
                break;
        case P2P_INVITATION_RESP:
                p2p_process_invitation_resp(p2p, sa, data + 1, len - 1);
                break;
        case P2P_PROV_DISC_REQ:
                p2p_process_prov_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
                break;
        case P2P_PROV_DISC_RESP:
                p2p_process_prov_disc_resp(p2p, sa, data + 1, len - 1);
                break;
        case P2P_DEV_DISC_REQ:
                p2p_process_dev_disc_req(p2p, sa, data + 1, len - 1, rx_freq);
                break;
        case P2P_DEV_DISC_RESP:
                p2p_process_dev_disc_resp(p2p, sa, data + 1, len - 1);
                break;
        default:
                p2p_dbg(p2p, "Unsupported P2P Public Action frame type %d",
                        data[0]);
                break;
        }
}


static void p2p_rx_action_public(struct p2p_data *p2p, const u8 *da,
                                 const u8 *sa, const u8 *bssid, const u8 *data,
                                 size_t len, int freq)
{
        if (len < 1)
                return;

        switch (data[0]) {
        case WLAN_PA_VENDOR_SPECIFIC:
                data++;
                len--;
                if (len < 4)
                        return;
                if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
                        return;

                data += 4;
                len -= 4;

                p2p_rx_p2p_action(p2p, sa, data, len, freq);
                break;
        case WLAN_PA_GAS_INITIAL_REQ:
                p2p_rx_gas_initial_req(p2p, sa, data + 1, len - 1, freq);
                break;
        case WLAN_PA_GAS_INITIAL_RESP:
                p2p_rx_gas_initial_resp(p2p, sa, data + 1, len - 1, freq);
                break;
        case WLAN_PA_GAS_COMEBACK_REQ:
                p2p_rx_gas_comeback_req(p2p, sa, data + 1, len - 1, freq);
                break;
        case WLAN_PA_GAS_COMEBACK_RESP:
                p2p_rx_gas_comeback_resp(p2p, sa, data + 1, len - 1, freq);
                break;
        }
}


void p2p_rx_action(struct p2p_data *p2p, const u8 *da, const u8 *sa,
                   const u8 *bssid, u8 category,
                   const u8 *data, size_t len, int freq)
{
        if (category == WLAN_ACTION_PUBLIC) {
                p2p_rx_action_public(p2p, da, sa, bssid, data, len, freq);
                return;
        }

        if (category != WLAN_ACTION_VENDOR_SPECIFIC)
                return;

        if (len < 4)
                return;

        if (WPA_GET_BE32(data) != P2P_IE_VENDOR_TYPE)
                return;
        data += 4;
        len -= 4;

        /* P2P action frame */
        p2p_dbg(p2p, "RX P2P Action from " MACSTR, MAC2STR(sa));
        wpa_hexdump(MSG_MSGDUMP, "P2P: P2P Action contents", data, len);

        if (len < 1)
                return;
        switch (data[0]) {
        case P2P_NOA:
                p2p_dbg(p2p, "Received P2P Action - Notice of Absence");
                /* TODO */
                break;
        case P2P_PRESENCE_REQ:
                p2p_process_presence_req(p2p, da, sa, data + 1, len - 1, freq);
                break;
        case P2P_PRESENCE_RESP:
                p2p_process_presence_resp(p2p, da, sa, data + 1, len - 1);
                break;
        case P2P_GO_DISC_REQ:
                p2p_process_go_disc_req(p2p, da, sa, data + 1, len - 1, freq);
                break;
        default:
                p2p_dbg(p2p, "Received P2P Action - unknown type %u", data[0]);
                break;
        }
}


static void p2p_go_neg_start(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;
        if (p2p->go_neg_peer == NULL)
                return;
        if (p2p->pending_listen_freq) {
                p2p_dbg(p2p, "Clear pending_listen_freq for p2p_go_neg_start");
                p2p->pending_listen_freq = 0;
        }
        p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
        p2p->go_neg_peer->status = P2P_SC_SUCCESS;
        /*
         * Set new timeout to make sure a previously set one does not expire
         * too quickly while waiting for the GO Negotiation to complete.
         */
        p2p_set_timeout(p2p, 0, 500000);
        p2p_connect_send(p2p, p2p->go_neg_peer);
}


static void p2p_invite_start(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;
        if (p2p->invite_peer == NULL)
                return;
        if (p2p->pending_listen_freq) {
                p2p_dbg(p2p, "Clear pending_listen_freq for p2p_invite_start");
                p2p->pending_listen_freq = 0;
        }
        p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
        p2p_invite_send(p2p, p2p->invite_peer, p2p->invite_go_dev_addr,
                        p2p->invite_dev_pw_id);
}


static void p2p_add_dev_from_probe_req(struct p2p_data *p2p, const u8 *addr,
                                       const u8 *ie, size_t ie_len)
{
        struct p2p_message msg;
        struct p2p_device *dev;

        os_memset(&msg, 0, sizeof(msg));
        if (p2p_parse_ies(ie, ie_len, &msg) < 0 || msg.p2p_attributes == NULL)
        {
                p2p_parse_free(&msg);
                return; /* not a P2P probe */
        }

        if (msg.ssid == NULL || msg.ssid[1] != P2P_WILDCARD_SSID_LEN ||
            os_memcmp(msg.ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN)
            != 0) {
                /* The Probe Request is not part of P2P Device Discovery. It is
                 * not known whether the source address of the frame is the P2P
                 * Device Address or P2P Interface Address. Do not add a new
                 * peer entry based on this frames.
                 */
                p2p_parse_free(&msg);
                return;
        }

        dev = p2p_get_device(p2p, addr);
        if (dev) {
                if (dev->country[0] == 0 && msg.listen_channel)
                        os_memcpy(dev->country, msg.listen_channel, 3);
                os_get_reltime(&dev->last_seen);
                p2p_parse_free(&msg);
                return; /* already known */
        }

        dev = p2p_create_device(p2p, addr);
        if (dev == NULL) {
                p2p_parse_free(&msg);
                return;
        }

        os_get_reltime(&dev->last_seen);
        dev->flags |= P2P_DEV_PROBE_REQ_ONLY;

        if (msg.listen_channel) {
                os_memcpy(dev->country, msg.listen_channel, 3);
                dev->listen_freq = p2p_channel_to_freq(msg.listen_channel[3],
                                                       msg.listen_channel[4]);
        }

        p2p_copy_wps_info(p2p, dev, 1, &msg);

        if (msg.wfd_subelems) {
                wpabuf_free(dev->info.wfd_subelems);
                dev->info.wfd_subelems = wpabuf_dup(msg.wfd_subelems);
        }

        p2p_parse_free(&msg);

        p2p_dbg(p2p, "Created device entry based on Probe Req: " MACSTR
                " dev_capab=0x%x group_capab=0x%x name='%s' listen_freq=%d",
                MAC2STR(dev->info.p2p_device_addr), dev->info.dev_capab,
                dev->info.group_capab, dev->info.device_name,
                dev->listen_freq);
}


struct p2p_device * p2p_add_dev_from_go_neg_req(struct p2p_data *p2p,
                                                const u8 *addr,
                                                struct p2p_message *msg)
{
        struct p2p_device *dev;

        dev = p2p_get_device(p2p, addr);
        if (dev) {
                os_get_reltime(&dev->last_seen);
                return dev; /* already known */
        }

        dev = p2p_create_device(p2p, addr);
        if (dev == NULL)
                return NULL;

        p2p_add_dev_info(p2p, addr, dev, msg);

        return dev;
}


static int dev_type_match(const u8 *dev_type, const u8 *req_dev_type)
{
        if (os_memcmp(dev_type, req_dev_type, WPS_DEV_TYPE_LEN) == 0)
                return 1;
        if (os_memcmp(dev_type, req_dev_type, 2) == 0 &&
            WPA_GET_BE32(&req_dev_type[2]) == 0 &&
            WPA_GET_BE16(&req_dev_type[6]) == 0)
                return 1; /* Category match with wildcard OUI/sub-category */
        return 0;
}


int dev_type_list_match(const u8 *dev_type, const u8 *req_dev_type[],
                        size_t num_req_dev_type)
{
        size_t i;
        for (i = 0; i < num_req_dev_type; i++) {
                if (dev_type_match(dev_type, req_dev_type[i]))
                        return 1;
        }
        return 0;
}


/**
 * p2p_match_dev_type - Match local device type with requested type
 * @p2p: P2P module context from p2p_init()
 * @wps: WPS TLVs from Probe Request frame (concatenated WPS IEs)
 * Returns: 1 on match, 0 on mismatch
 *
 * This function can be used to match the Requested Device Type attribute in
 * WPS IE with the local device types for deciding whether to reply to a Probe
 * Request frame.
 */
int p2p_match_dev_type(struct p2p_data *p2p, struct wpabuf *wps)
{
        struct wps_parse_attr attr;
        size_t i;

        if (wps_parse_msg(wps, &attr))
                return 1; /* assume no Requested Device Type attributes */

        if (attr.num_req_dev_type == 0)
                return 1; /* no Requested Device Type attributes -> match */

        if (dev_type_list_match(p2p->cfg->pri_dev_type, attr.req_dev_type,
                                attr.num_req_dev_type))
                return 1; /* Own Primary Device Type matches */

        for (i = 0; i < p2p->cfg->num_sec_dev_types; i++) {
                if (dev_type_list_match(p2p->cfg->sec_dev_type[i],
                                        attr.req_dev_type,
                                        attr.num_req_dev_type))
                        return 1; /* Own Secondary Device Type matches */
        }

        /* No matching device type found */
        return 0;
}


struct wpabuf * p2p_build_probe_resp_ies(struct p2p_data *p2p)
{
        struct wpabuf *buf;
        u8 *len;
        int pw_id = -1;
        size_t extra = 0;

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

        if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
                extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);

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

        if (p2p->go_neg_peer) {
                /* Advertise immediate availability of WPS credential */
                pw_id = p2p_wps_method_pw_id(p2p->go_neg_peer->wps_method);
        }

        if (p2p_build_wps_ie(p2p, buf, pw_id, 1) < 0) {
                p2p_dbg(p2p, "Failed to build WPS IE for Probe Response");
                wpabuf_free(buf);
                return NULL;
        }

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

        if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P])
                wpabuf_put_buf(buf,
                               p2p->vendor_elem[VENDOR_ELEM_PROBE_RESP_P2P]);

        /* P2P IE */
        len = p2p_buf_add_ie_hdr(buf);
        p2p_buf_add_capability(buf, p2p->dev_capab &
                               ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
        if (p2p->ext_listen_interval)
                p2p_buf_add_ext_listen_timing(buf, p2p->ext_listen_period,
                                              p2p->ext_listen_interval);
        p2p_buf_add_device_info(buf, p2p, NULL);
        p2p_buf_update_ie_hdr(buf, len);

        return buf;
}


static enum p2p_probe_req_status
p2p_reply_probe(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
                const u8 *bssid, const u8 *ie, size_t ie_len)
{
        struct ieee802_11_elems elems;
        struct wpabuf *buf;
        struct ieee80211_mgmt *resp;
        struct p2p_message msg;
        struct wpabuf *ies;

        if (!p2p->in_listen || !p2p->drv_in_listen) {
                /* not in Listen state - ignore Probe Request */
                p2p_dbg(p2p, "Not in Listen state (in_listen=%d drv_in_listen=%d) - ignore Probe Request",
                        p2p->in_listen, p2p->drv_in_listen);
                return P2P_PREQ_NOT_LISTEN;
        }

        if (ieee802_11_parse_elems((u8 *) ie, ie_len, &elems, 0) ==
            ParseFailed) {
                /* Ignore invalid Probe Request frames */
                p2p_dbg(p2p, "Could not parse Probe Request frame - ignore it");
                return P2P_PREQ_MALFORMED;
        }

        if (elems.p2p == NULL) {
                /* not a P2P probe - ignore it */
                p2p_dbg(p2p, "Not a P2P probe - ignore it");
                return P2P_PREQ_NOT_P2P;
        }

        if (dst && !is_broadcast_ether_addr(dst) &&
            os_memcmp(dst, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
                /* Not sent to the broadcast address or our P2P Device Address
                 */
                p2p_dbg(p2p, "Probe Req DA " MACSTR " not ours - ignore it",
                        MAC2STR(dst));
                return P2P_PREQ_NOT_PROCESSED;
        }

        if (bssid && !is_broadcast_ether_addr(bssid)) {
                /* Not sent to the Wildcard BSSID */
                p2p_dbg(p2p, "Probe Req BSSID " MACSTR " not wildcard - ignore it",
                        MAC2STR(bssid));
                return P2P_PREQ_NOT_PROCESSED;
        }

        if (elems.ssid == NULL || elems.ssid_len != P2P_WILDCARD_SSID_LEN ||
            os_memcmp(elems.ssid, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) !=
            0) {
                /* not using P2P Wildcard SSID - ignore */
                p2p_dbg(p2p, "Probe Req not using P2P Wildcard SSID - ignore it");
                return P2P_PREQ_NOT_PROCESSED;
        }

        if (supp_rates_11b_only(&elems)) {
                /* Indicates support for 11b rates only */
                p2p_dbg(p2p, "Probe Req with 11b rates only supported - ignore it");
                return P2P_PREQ_NOT_P2P;
        }

        os_memset(&msg, 0, sizeof(msg));
        if (p2p_parse_ies(ie, ie_len, &msg) < 0) {
                /* Could not parse P2P attributes */
                p2p_dbg(p2p, "Could not parse P2P attributes in Probe Req - ignore it");
                return P2P_PREQ_NOT_P2P;
        }

        if (msg.device_id &&
            os_memcmp(msg.device_id, p2p->cfg->dev_addr, ETH_ALEN) != 0) {
                /* Device ID did not match */
                p2p_dbg(p2p, "Probe Req requested Device ID " MACSTR " did not match - ignore it",
                        MAC2STR(msg.device_id));
                p2p_parse_free(&msg);
                return P2P_PREQ_NOT_PROCESSED;
        }

        /* Check Requested Device Type match */
        if (msg.wps_attributes &&
            !p2p_match_dev_type(p2p, msg.wps_attributes)) {
                /* No match with Requested Device Type */
                p2p_dbg(p2p, "Probe Req requestred Device Type did not match - ignore it");
                p2p_parse_free(&msg);
                return P2P_PREQ_NOT_PROCESSED;
        }
        p2p_parse_free(&msg);

        if (!p2p->cfg->send_probe_resp) {
                /* Response generated elsewhere */
                p2p_dbg(p2p, "Probe Resp generated elsewhere - do not generate additional response");
                return P2P_PREQ_NOT_PROCESSED;
        }

        p2p_dbg(p2p, "Reply to P2P Probe Request in Listen state");

        /*
         * We do not really have a specific BSS that this frame is advertising,
         * so build a frame that has some information in valid format. This is
         * really only used for discovery purposes, not to learn exact BSS
         * parameters.
         */
        ies = p2p_build_probe_resp_ies(p2p);
        if (ies == NULL)
                return P2P_PREQ_NOT_PROCESSED;

        buf = wpabuf_alloc(200 + wpabuf_len(ies));
        if (buf == NULL) {
                wpabuf_free(ies);
                return P2P_PREQ_NOT_PROCESSED;
        }

        resp = NULL;
        resp = wpabuf_put(buf, resp->u.probe_resp.variable - (u8 *) resp);

        resp->frame_control = host_to_le16((WLAN_FC_TYPE_MGMT << 2) |
                                           (WLAN_FC_STYPE_PROBE_RESP << 4));
        os_memcpy(resp->da, addr, ETH_ALEN);
        os_memcpy(resp->sa, p2p->cfg->dev_addr, ETH_ALEN);
        os_memcpy(resp->bssid, p2p->cfg->dev_addr, ETH_ALEN);
        resp->u.probe_resp.beacon_int = host_to_le16(100);
        /* hardware or low-level driver will setup seq_ctrl and timestamp */
        resp->u.probe_resp.capab_info =
                host_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE |
                             WLAN_CAPABILITY_PRIVACY |
                             WLAN_CAPABILITY_SHORT_SLOT_TIME);

        wpabuf_put_u8(buf, WLAN_EID_SSID);
        wpabuf_put_u8(buf, P2P_WILDCARD_SSID_LEN);
        wpabuf_put_data(buf, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN);

        wpabuf_put_u8(buf, WLAN_EID_SUPP_RATES);
        wpabuf_put_u8(buf, 8);
        wpabuf_put_u8(buf, (60 / 5) | 0x80);
        wpabuf_put_u8(buf, 90 / 5);
        wpabuf_put_u8(buf, (120 / 5) | 0x80);
        wpabuf_put_u8(buf, 180 / 5);
        wpabuf_put_u8(buf, (240 / 5) | 0x80);
        wpabuf_put_u8(buf, 360 / 5);
        wpabuf_put_u8(buf, 480 / 5);
        wpabuf_put_u8(buf, 540 / 5);

        wpabuf_put_u8(buf, WLAN_EID_DS_PARAMS);
        wpabuf_put_u8(buf, 1);
        wpabuf_put_u8(buf, p2p->cfg->channel);

        wpabuf_put_buf(buf, ies);
        wpabuf_free(ies);

        p2p->cfg->send_probe_resp(p2p->cfg->cb_ctx, buf);

        wpabuf_free(buf);

        return P2P_PREQ_NOT_PROCESSED;
}


enum p2p_probe_req_status
p2p_probe_req_rx(struct p2p_data *p2p, const u8 *addr, const u8 *dst,
                 const u8 *bssid, const u8 *ie, size_t ie_len)
{
        enum p2p_probe_req_status res;

        p2p_add_dev_from_probe_req(p2p, addr, ie, ie_len);

        res = p2p_reply_probe(p2p, addr, dst, bssid, ie, ie_len);

        if ((p2p->state == P2P_CONNECT || p2p->state == P2P_CONNECT_LISTEN) &&
            p2p->go_neg_peer &&
            os_memcmp(addr, p2p->go_neg_peer->info.p2p_device_addr, ETH_ALEN)
            == 0 &&
            !(p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
                /* Received a Probe Request from GO Negotiation peer */
                p2p_dbg(p2p, "Found GO Negotiation peer - try to start GO negotiation from timeout");
                eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
                eloop_register_timeout(0, 0, p2p_go_neg_start, p2p, NULL);
                return P2P_PREQ_PROCESSED;
        }

        if ((p2p->state == P2P_INVITE || p2p->state == P2P_INVITE_LISTEN) &&
            p2p->invite_peer &&
            (p2p->invite_peer->flags & P2P_DEV_WAIT_INV_REQ_ACK) &&
            os_memcmp(addr, p2p->invite_peer->info.p2p_device_addr, ETH_ALEN)
            == 0) {
                /* Received a Probe Request from Invite peer */
                p2p_dbg(p2p, "Found Invite peer - try to start Invite from timeout");
                eloop_cancel_timeout(p2p_invite_start, p2p, NULL);
                eloop_register_timeout(0, 0, p2p_invite_start, p2p, NULL);
                return P2P_PREQ_PROCESSED;
        }

        return res;
}


static int p2p_assoc_req_ie_wlan_ap(struct p2p_data *p2p, const u8 *bssid,
                                    u8 *buf, size_t len, struct wpabuf *p2p_ie)
{
        struct wpabuf *tmp;
        u8 *lpos;
        size_t tmplen;
        int res;
        u8 group_capab;

        if (p2p_ie == NULL)
                return 0; /* WLAN AP is not a P2P manager */

        /*
         * (Re)Association Request - P2P IE
         * P2P Capability attribute (shall be present)
         * P2P Interface attribute (present if concurrent device and
         *      P2P Management is enabled)
         */
        tmp = wpabuf_alloc(200);
        if (tmp == NULL)
                return -1;

        lpos = p2p_buf_add_ie_hdr(tmp);
        group_capab = 0;
        if (p2p->num_groups > 0) {
                group_capab |= P2P_GROUP_CAPAB_GROUP_OWNER;
                if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
                    (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED) &&
                    p2p->cross_connect)
                        group_capab |= P2P_GROUP_CAPAB_CROSS_CONN;
        }
        p2p_buf_add_capability(tmp, p2p->dev_capab, group_capab);
        if ((p2p->dev_capab & P2P_DEV_CAPAB_CONCURRENT_OPER) &&
            (p2p->dev_capab & P2P_DEV_CAPAB_INFRA_MANAGED))
                p2p_buf_add_p2p_interface(tmp, p2p);
        p2p_buf_update_ie_hdr(tmp, lpos);

        tmplen = wpabuf_len(tmp);
        if (tmplen > len)
                res = -1;
        else {
                os_memcpy(buf, wpabuf_head(tmp), tmplen);
                res = tmplen;
        }
        wpabuf_free(tmp);

        return res;
}


int p2p_assoc_req_ie(struct p2p_data *p2p, const u8 *bssid, u8 *buf,
                     size_t len, int p2p_group, struct wpabuf *p2p_ie)
{
        struct wpabuf *tmp;
        u8 *lpos;
        struct p2p_device *peer;
        size_t tmplen;
        int res;
        size_t extra = 0;

        if (!p2p_group)
                return p2p_assoc_req_ie_wlan_ap(p2p, bssid, buf, len, p2p_ie);

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

        if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
                extra += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);

        /*
         * (Re)Association Request - P2P IE
         * P2P Capability attribute (shall be present)
         * Extended Listen Timing (may be present)
         * P2P Device Info attribute (shall be present)
         */
        tmp = wpabuf_alloc(200 + extra);
        if (tmp == NULL)
                return -1;

#ifdef CONFIG_WIFI_DISPLAY
        if (p2p->wfd_ie_assoc_req)
                wpabuf_put_buf(tmp, p2p->wfd_ie_assoc_req);
#endif /* CONFIG_WIFI_DISPLAY */

        if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ])
                wpabuf_put_buf(tmp,
                               p2p->vendor_elem[VENDOR_ELEM_P2P_ASSOC_REQ]);

        peer = bssid ? p2p_get_device(p2p, bssid) : NULL;

        lpos = p2p_buf_add_ie_hdr(tmp);
        p2p_buf_add_capability(tmp, p2p->dev_capab, 0);
        if (p2p->ext_listen_interval)
                p2p_buf_add_ext_listen_timing(tmp, p2p->ext_listen_period,
                                              p2p->ext_listen_interval);
        p2p_buf_add_device_info(tmp, p2p, peer);
        p2p_buf_update_ie_hdr(tmp, lpos);

        tmplen = wpabuf_len(tmp);
        if (tmplen > len)
                res = -1;
        else {
                os_memcpy(buf, wpabuf_head(tmp), tmplen);
                res = tmplen;
        }
        wpabuf_free(tmp);

        return res;
}


int p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end)
{
        struct wpabuf *p2p_ie;
        int ret;

        p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len, P2P_IE_VENDOR_TYPE);
        if (p2p_ie == NULL)
                return 0;

        ret = p2p_attr_text(p2p_ie, buf, end);
        wpabuf_free(p2p_ie);
        return ret;
}


int p2p_parse_dev_addr_in_p2p_ie(struct wpabuf *p2p_ie, u8 *dev_addr)
{
        struct p2p_message msg;

        os_memset(&msg, 0, sizeof(msg));
        if (p2p_parse_p2p_ie(p2p_ie, &msg))
                return -1;

        if (msg.p2p_device_addr) {
                os_memcpy(dev_addr, msg.p2p_device_addr, ETH_ALEN);
                return 0;
        } else if (msg.device_id) {
                os_memcpy(dev_addr, msg.device_id, ETH_ALEN);
                return 0;
        }
        return -1;
}


int p2p_parse_dev_addr(const u8 *ies, size_t ies_len, u8 *dev_addr)
{
        struct wpabuf *p2p_ie;
        int ret;

        p2p_ie = ieee802_11_vendor_ie_concat(ies, ies_len,
                                             P2P_IE_VENDOR_TYPE);
        if (p2p_ie == NULL)
                return -1;
        ret = p2p_parse_dev_addr_in_p2p_ie(p2p_ie, dev_addr);
        wpabuf_free(p2p_ie);
        return ret;
}


static void p2p_clear_go_neg(struct p2p_data *p2p)
{
        p2p->go_neg_peer = NULL;
        p2p_clear_timeout(p2p);
        p2p_set_state(p2p, P2P_IDLE);
}


void p2p_wps_success_cb(struct p2p_data *p2p, const u8 *mac_addr)
{
        if (p2p->go_neg_peer == NULL) {
                p2p_dbg(p2p, "No pending Group Formation - ignore WPS registration success notification");
                return; /* No pending Group Formation */
        }

        if (os_memcmp(mac_addr, p2p->go_neg_peer->intended_addr, ETH_ALEN) !=
            0) {
                p2p_dbg(p2p, "Ignore WPS registration success notification for "
                        MACSTR " (GO Negotiation peer " MACSTR ")",
                        MAC2STR(mac_addr),
                        MAC2STR(p2p->go_neg_peer->intended_addr));
                return; /* Ignore unexpected peer address */
        }

        p2p_dbg(p2p, "Group Formation completed successfully with " MACSTR,
                MAC2STR(mac_addr));

        p2p_clear_go_neg(p2p);
}


void p2p_group_formation_failed(struct p2p_data *p2p)
{
        if (p2p->go_neg_peer == NULL) {
                p2p_dbg(p2p, "No pending Group Formation - ignore group formation failure notification");
                return; /* No pending Group Formation */
        }

        p2p_dbg(p2p, "Group Formation failed with " MACSTR,
                MAC2STR(p2p->go_neg_peer->intended_addr));

        p2p_clear_go_neg(p2p);
}


struct p2p_data * p2p_init(const struct p2p_config *cfg)
{
        struct p2p_data *p2p;

        if (cfg->max_peers < 1 ||
            cfg->passphrase_len < 8 || cfg->passphrase_len > 63)
                return NULL;

        p2p = os_zalloc(sizeof(*p2p) + sizeof(*cfg));
        if (p2p == NULL)
                return NULL;
        p2p->cfg = (struct p2p_config *) (p2p + 1);
        os_memcpy(p2p->cfg, cfg, sizeof(*cfg));
        if (cfg->dev_name)
                p2p->cfg->dev_name = os_strdup(cfg->dev_name);
        if (cfg->manufacturer)
                p2p->cfg->manufacturer = os_strdup(cfg->manufacturer);
        if (cfg->model_name)
                p2p->cfg->model_name = os_strdup(cfg->model_name);
        if (cfg->model_number)
                p2p->cfg->model_number = os_strdup(cfg->model_number);
        if (cfg->serial_number)
                p2p->cfg->serial_number = os_strdup(cfg->serial_number);
        if (cfg->pref_chan) {
                p2p->cfg->pref_chan = os_malloc(cfg->num_pref_chan *
                                                sizeof(struct p2p_channel));
                if (p2p->cfg->pref_chan) {
                        os_memcpy(p2p->cfg->pref_chan, cfg->pref_chan,
                                  cfg->num_pref_chan *
                                  sizeof(struct p2p_channel));
                } else
                        p2p->cfg->num_pref_chan = 0;
        }

        p2ps_gen_hash(p2p, P2PS_WILD_HASH_STR, p2p->wild_card_hash);

        p2p->min_disc_int = 1;
        p2p->max_disc_int = 3;
        p2p->max_disc_tu = -1;

        if (os_get_random(&p2p->next_tie_breaker, 1) < 0)
                p2p->next_tie_breaker = 0;
        p2p->next_tie_breaker &= 0x01;
        if (cfg->sd_request)
                p2p->dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;
        p2p->dev_capab |= P2P_DEV_CAPAB_INVITATION_PROCEDURE;
        if (cfg->concurrent_operations)
                p2p->dev_capab |= P2P_DEV_CAPAB_CONCURRENT_OPER;
        p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;

        dl_list_init(&p2p->devices);

        eloop_register_timeout(P2P_PEER_EXPIRATION_INTERVAL, 0,
                               p2p_expiration_timeout, p2p, NULL);

        p2p->go_timeout = 100;
        p2p->client_timeout = 20;
        p2p->num_p2p_sd_queries = 0;

        p2p_dbg(p2p, "initialized");
        p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
        p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);

        return p2p;
}


void p2p_deinit(struct p2p_data *p2p)
{
#ifdef CONFIG_WIFI_DISPLAY
        wpabuf_free(p2p->wfd_ie_beacon);
        wpabuf_free(p2p->wfd_ie_probe_req);
        wpabuf_free(p2p->wfd_ie_probe_resp);
        wpabuf_free(p2p->wfd_ie_assoc_req);
        wpabuf_free(p2p->wfd_ie_invitation);
        wpabuf_free(p2p->wfd_ie_prov_disc_req);
        wpabuf_free(p2p->wfd_ie_prov_disc_resp);
        wpabuf_free(p2p->wfd_ie_go_neg);
        wpabuf_free(p2p->wfd_dev_info);
        wpabuf_free(p2p->wfd_assoc_bssid);
        wpabuf_free(p2p->wfd_coupled_sink_info);
#endif /* CONFIG_WIFI_DISPLAY */

        eloop_cancel_timeout(p2p_expiration_timeout, p2p, NULL);
        eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);
        eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);
        eloop_cancel_timeout(p2p_go_neg_start, p2p, NULL);
        eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
        p2p_flush(p2p);
        p2p_free_req_dev_types(p2p);
        os_free(p2p->cfg->dev_name);
        os_free(p2p->cfg->manufacturer);
        os_free(p2p->cfg->model_name);
        os_free(p2p->cfg->model_number);
        os_free(p2p->cfg->serial_number);
        os_free(p2p->cfg->pref_chan);
        os_free(p2p->groups);
        wpabuf_free(p2p->sd_resp);
        os_free(p2p->after_scan_tx);
        p2p_remove_wps_vendor_extensions(p2p);
        os_free(p2p->no_go_freq.range);
        os_free(p2p);
}


void p2p_flush(struct p2p_data *p2p)
{
        struct p2p_device *dev, *prev;
        p2p_stop_find(p2p);
        dl_list_for_each_safe(dev, prev, &p2p->devices, struct p2p_device,
                              list) {
                dl_list_del(&dev->list);
                p2p_device_free(p2p, dev);
        }
        p2p_free_sd_queries(p2p);
        os_free(p2p->after_scan_tx);
        p2p->after_scan_tx = NULL;
}


int p2p_unauthorize(struct p2p_data *p2p, const u8 *addr)
{
        struct p2p_device *dev;

        dev = p2p_get_device(p2p, addr);
        if (dev == NULL)
                return -1;

        p2p_dbg(p2p, "Unauthorizing " MACSTR, MAC2STR(addr));

        if (p2p->go_neg_peer == dev) {
                eloop_cancel_timeout(p2p_go_neg_wait_timeout, p2p, NULL);
                p2p->go_neg_peer = NULL;
        }

        dev->wps_method = WPS_NOT_READY;
        dev->oob_pw_id = 0;
        dev->flags &= ~P2P_DEV_WAIT_GO_NEG_RESPONSE;
        dev->flags &= ~P2P_DEV_WAIT_GO_NEG_CONFIRM;

        /* Check if after_scan_tx is for this peer. If so free it */
        if (p2p->after_scan_tx &&
            os_memcmp(addr, p2p->after_scan_tx->dst, ETH_ALEN) == 0) {
                os_free(p2p->after_scan_tx);
                p2p->after_scan_tx = NULL;
        }

        return 0;
}


int p2p_set_dev_name(struct p2p_data *p2p, const char *dev_name)
{
        os_free(p2p->cfg->dev_name);
        if (dev_name) {
                p2p->cfg->dev_name = os_strdup(dev_name);
                if (p2p->cfg->dev_name == NULL)
                        return -1;
        } else
                p2p->cfg->dev_name = NULL;
        return 0;
}


int p2p_set_manufacturer(struct p2p_data *p2p, const char *manufacturer)
{
        os_free(p2p->cfg->manufacturer);
        p2p->cfg->manufacturer = NULL;
        if (manufacturer) {
                p2p->cfg->manufacturer = os_strdup(manufacturer);
                if (p2p->cfg->manufacturer == NULL)
                        return -1;
        }

        return 0;
}


int p2p_set_model_name(struct p2p_data *p2p, const char *model_name)
{
        os_free(p2p->cfg->model_name);
        p2p->cfg->model_name = NULL;
        if (model_name) {
                p2p->cfg->model_name = os_strdup(model_name);
                if (p2p->cfg->model_name == NULL)
                        return -1;
        }

        return 0;
}


int p2p_set_model_number(struct p2p_data *p2p, const char *model_number)
{
        os_free(p2p->cfg->model_number);
        p2p->cfg->model_number = NULL;
        if (model_number) {
                p2p->cfg->model_number = os_strdup(model_number);
                if (p2p->cfg->model_number == NULL)
                        return -1;
        }

        return 0;
}


int p2p_set_serial_number(struct p2p_data *p2p, const char *serial_number)
{
        os_free(p2p->cfg->serial_number);
        p2p->cfg->serial_number = NULL;
        if (serial_number) {
                p2p->cfg->serial_number = os_strdup(serial_number);
                if (p2p->cfg->serial_number == NULL)
                        return -1;
        }

        return 0;
}


void p2p_set_config_methods(struct p2p_data *p2p, u16 config_methods)
{
        p2p->cfg->config_methods = config_methods;
}


void p2p_set_uuid(struct p2p_data *p2p, const u8 *uuid)
{
        os_memcpy(p2p->cfg->uuid, uuid, 16);
}


int p2p_set_pri_dev_type(struct p2p_data *p2p, const u8 *pri_dev_type)
{
        os_memcpy(p2p->cfg->pri_dev_type, pri_dev_type, 8);
        return 0;
}


int p2p_set_sec_dev_types(struct p2p_data *p2p, const u8 dev_types[][8],
                          size_t num_dev_types)
{
        if (num_dev_types > P2P_SEC_DEVICE_TYPES)
                num_dev_types = P2P_SEC_DEVICE_TYPES;
        p2p->cfg->num_sec_dev_types = num_dev_types;
        os_memcpy(p2p->cfg->sec_dev_type, dev_types, num_dev_types * 8);
        return 0;
}


void p2p_remove_wps_vendor_extensions(struct p2p_data *p2p)
{
        int i;

        for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
                wpabuf_free(p2p->wps_vendor_ext[i]);
                p2p->wps_vendor_ext[i] = NULL;
        }
}


int p2p_add_wps_vendor_extension(struct p2p_data *p2p,
                                 const struct wpabuf *vendor_ext)
{
        int i;

        if (vendor_ext == NULL)
                return -1;

        for (i = 0; i < P2P_MAX_WPS_VENDOR_EXT; i++) {
                if (p2p->wps_vendor_ext[i] == NULL)
                        break;
        }
        if (i >= P2P_MAX_WPS_VENDOR_EXT)
                return -1;

        p2p->wps_vendor_ext[i] = wpabuf_dup(vendor_ext);
        if (p2p->wps_vendor_ext[i] == NULL)
                return -1;

        return 0;
}


int p2p_set_country(struct p2p_data *p2p, const char *country)
{
        os_memcpy(p2p->cfg->country, country, 3);
        return 0;
}


static int p2p_pre_find_operation(struct p2p_data *p2p, struct p2p_device *dev)
{
        if (dev->sd_pending_bcast_queries == 0) {
                /* Initialize with total number of registered broadcast
                 * SD queries. */
                dev->sd_pending_bcast_queries = p2p->num_p2p_sd_queries;
        }

        if (p2p_start_sd(p2p, dev) == 0)
                return 1;

        if (dev->req_config_methods &&
            !(dev->flags & P2P_DEV_PD_FOR_JOIN)) {
                p2p_dbg(p2p, "Send pending Provision Discovery Request to "
                        MACSTR " (config methods 0x%x)",
                        MAC2STR(dev->info.p2p_device_addr),
                        dev->req_config_methods);
                if (p2p_send_prov_disc_req(p2p, dev, 0, 0) == 0)
                        return 1;
        }

        return 0;
}


void p2p_continue_find(struct p2p_data *p2p)
{
        struct p2p_device *dev;
        int found;

        p2p_set_state(p2p, P2P_SEARCH);

        /* Continue from the device following the last iteration */
        found = 0;
        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                if (dev == p2p->last_p2p_find_oper) {
                        found = 1;
                        continue;
                }
                if (!found)
                        continue;
                if (p2p_pre_find_operation(p2p, dev) > 0) {
                        p2p->last_p2p_find_oper = dev;
                        return;
                }
        }

        /*
         * Wrap around to the beginning of the list and continue until the last
         * iteration device.
         */
        dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) {
                if (p2p_pre_find_operation(p2p, dev) > 0) {
                        p2p->last_p2p_find_oper = dev;
                        return;
                }
                if (dev == p2p->last_p2p_find_oper)
                        break;
        }

        p2p_listen_in_find(p2p, 1);
}


static void p2p_sd_cb(struct p2p_data *p2p, int success)
{
        p2p_dbg(p2p, "Service Discovery Query TX callback: success=%d",
                success);
        p2p->pending_action_state = P2P_NO_PENDING_ACTION;

        if (!success) {
                if (p2p->sd_peer)
                        p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
                p2p->sd_peer = NULL;
                p2p_continue_find(p2p);
                return;
        }

        if (p2p->sd_peer == NULL) {
                p2p_dbg(p2p, "No SD peer entry known");
                p2p_continue_find(p2p);
                return;
        }

        if (p2p->sd_query && p2p->sd_query->for_all_peers) {
                /* Update the pending broadcast SD query count for this device
                 */
                p2p->sd_peer->sd_pending_bcast_queries--;

                /*
                 * If there are no pending broadcast queries for this device,
                 * mark it as done (-1).
                 */
                if (p2p->sd_peer->sd_pending_bcast_queries == 0)
                        p2p->sd_peer->sd_pending_bcast_queries = -1;
        }

        /* Wait for response from the peer */
        p2p_set_state(p2p, P2P_SD_DURING_FIND);
        p2p_set_timeout(p2p, 0, 200000);
}


/**
 * p2p_retry_pd - Retry any pending provision disc requests in IDLE state
 * @p2p: P2P module context from p2p_init()
 */
static void p2p_retry_pd(struct p2p_data *p2p)
{
        struct p2p_device *dev;

        if (p2p->state != P2P_IDLE)
                return;

        /*
         * Retry the prov disc req attempt only for the peer that the user had
         * requested.
         */

        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) != 0)
                        continue;
                if (!dev->req_config_methods)
                        continue;

                p2p_dbg(p2p, "Send pending Provision Discovery Request to "
                        MACSTR " (config methods 0x%x)",
                        MAC2STR(dev->info.p2p_device_addr),
                        dev->req_config_methods);
                p2p_send_prov_disc_req(p2p, dev,
                                       dev->flags & P2P_DEV_PD_FOR_JOIN,
                                       p2p->pd_force_freq);
                return;
        }
}


static void p2p_prov_disc_cb(struct p2p_data *p2p, int success)
{
        p2p_dbg(p2p, "Provision Discovery Request TX callback: success=%d",
                success);

        /*
         * Postpone resetting the pending action state till after we actually
         * time out. This allows us to take some action like notifying any
         * interested parties about no response to the request.
         *
         * When the timer (below) goes off we check in IDLE, SEARCH, or
         * LISTEN_ONLY state, which are the only allowed states to issue a PD
         * requests in, if this was still pending and then raise notification.
         */

        if (!success) {
                p2p->pending_action_state = P2P_NO_PENDING_ACTION;

                if (p2p->user_initiated_pd &&
                    (p2p->state == P2P_SEARCH || p2p->state == P2P_LISTEN_ONLY))
                {
                        /* Retry request from timeout to avoid busy loops */
                        p2p->pending_action_state = P2P_PENDING_PD;
                        p2p_set_timeout(p2p, 0, 50000);
                } else if (p2p->state != P2P_IDLE)
                        p2p_continue_find(p2p);
                else if (p2p->user_initiated_pd) {
                        p2p->pending_action_state = P2P_PENDING_PD;
                        p2p_set_timeout(p2p, 0, 300000);
                }
                return;
        }

        /*
         * This postponing, of resetting pending_action_state, needs to be
         * done only for user initiated PD requests and not internal ones.
         */
        if (p2p->user_initiated_pd)
                p2p->pending_action_state = P2P_PENDING_PD;
        else
                p2p->pending_action_state = P2P_NO_PENDING_ACTION;

        /* Wait for response from the peer */
        if (p2p->state == P2P_SEARCH)
                p2p_set_state(p2p, P2P_PD_DURING_FIND);
        p2p_set_timeout(p2p, 0, 200000);
}


int p2p_scan_res_handler(struct p2p_data *p2p, const u8 *bssid, int freq,
                         struct os_reltime *rx_time, int level, const u8 *ies,
                         size_t ies_len)
{
        if (os_reltime_before(rx_time, &p2p->find_start)) {
                /*
                 * The driver may have cached (e.g., in cfg80211 BSS table) the
                 * scan results for relatively long time. To avoid reporting
                 * stale information, update P2P peers only based on results
                 * that have based on frames received after the last p2p_find
                 * operation was started.
                 */
                p2p_dbg(p2p, "Ignore old scan result for " MACSTR
                        " (rx_time=%u.%06u)",
                        MAC2STR(bssid), (unsigned int) rx_time->sec,
                        (unsigned int) rx_time->usec);
                return 0;
        }

        p2p_add_device(p2p, bssid, freq, rx_time, level, ies, ies_len, 1);

        return 0;
}


void p2p_scan_res_handled(struct p2p_data *p2p)
{
        if (!p2p->p2p_scan_running) {
                p2p_dbg(p2p, "p2p_scan was not running, but scan results received");
        }
        p2p->p2p_scan_running = 0;
        eloop_cancel_timeout(p2p_scan_timeout, p2p, NULL);

        if (p2p_run_after_scan(p2p))
                return;
        if (p2p->state == P2P_SEARCH)
                p2p_continue_find(p2p);
}


void p2p_scan_ie(struct p2p_data *p2p, struct wpabuf *ies, const u8 *dev_id)
{
        u8 dev_capab;
        u8 *len;

#ifdef CONFIG_WIFI_DISPLAY
        if (p2p->wfd_ie_probe_req)
                wpabuf_put_buf(ies, p2p->wfd_ie_probe_req);
#endif /* CONFIG_WIFI_DISPLAY */

        if (p2p->vendor_elem && p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
                wpabuf_put_buf(ies,
                               p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);

        len = p2p_buf_add_ie_hdr(ies);

        dev_capab = p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;

        /* P2PS requires Probe Request frames to include SD bit */
        if (p2p->p2ps_seek && p2p->p2ps_seek_count)
                dev_capab |= P2P_DEV_CAPAB_SERVICE_DISCOVERY;

        p2p_buf_add_capability(ies, dev_capab, 0);

        if (dev_id)
                p2p_buf_add_device_id(ies, dev_id);
        if (p2p->cfg->reg_class && p2p->cfg->channel)
                p2p_buf_add_listen_channel(ies, p2p->cfg->country,
                                           p2p->cfg->reg_class,
                                           p2p->cfg->channel);
        if (p2p->ext_listen_interval)
                p2p_buf_add_ext_listen_timing(ies, p2p->ext_listen_period,
                                              p2p->ext_listen_interval);

        if (p2p->p2ps_seek && p2p->p2ps_seek_count)
                p2p_buf_add_service_hash(ies, p2p);

        /* TODO: p2p_buf_add_operating_channel() if GO */
        p2p_buf_update_ie_hdr(ies, len);
}


size_t p2p_scan_ie_buf_len(struct p2p_data *p2p)
{
        size_t len = 100;

#ifdef CONFIG_WIFI_DISPLAY
        if (p2p && p2p->wfd_ie_probe_req)
                len += wpabuf_len(p2p->wfd_ie_probe_req);
#endif /* CONFIG_WIFI_DISPLAY */

        if (p2p && p2p->vendor_elem &&
            p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P])
                len += wpabuf_len(p2p->vendor_elem[VENDOR_ELEM_PROBE_REQ_P2P]);

        return len;
}


int p2p_ie_text(struct wpabuf *p2p_ie, char *buf, char *end)
{
        return p2p_attr_text(p2p_ie, buf, end);
}


static void p2p_go_neg_req_cb(struct p2p_data *p2p, int success)
{
        struct p2p_device *dev = p2p->go_neg_peer;
        int timeout;

        p2p_dbg(p2p, "GO Negotiation Request TX callback: success=%d", success);

        if (dev == NULL) {
                p2p_dbg(p2p, "No pending GO Negotiation");
                return;
        }

        if (success) {
                if (dev->flags & P2P_DEV_USER_REJECTED) {
                        p2p_set_state(p2p, P2P_IDLE);
                        return;
                }
        } else if (dev->go_neg_req_sent) {
                /* Cancel the increment from p2p_connect_send() on failure */
                dev->go_neg_req_sent--;
        }

        if (!success &&
            (dev->info.dev_capab & P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY) &&
            !is_zero_ether_addr(dev->member_in_go_dev)) {
                p2p_dbg(p2p, "Peer " MACSTR " did not acknowledge request - try to use device discoverability through its GO",
                        MAC2STR(dev->info.p2p_device_addr));
                p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
                p2p_send_dev_disc_req(p2p, dev);
                return;
        }

        /*
         * Use P2P find, if needed, to find the other device from its listen
         * channel.
         */
        p2p_set_state(p2p, P2P_CONNECT);
        timeout = success ? 500000 : 100000;
        if (!success && p2p->go_neg_peer &&
            (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE)) {
                unsigned int r;
                /*
                 * Peer is expected to wait our response and we will skip the
                 * listen phase. Add some randomness to the wait time here to
                 * make it less likely to hit cases where we could end up in
                 * sync with peer not listening.
                 */
                if (os_get_random((u8 *) &r, sizeof(r)) < 0)
                        r = 0;
                timeout += r % 100000;
        }
        p2p_set_timeout(p2p, 0, timeout);
}


static void p2p_go_neg_resp_cb(struct p2p_data *p2p, int success)
{
        p2p_dbg(p2p, "GO Negotiation Response TX callback: success=%d",
                success);
        if (!p2p->go_neg_peer && p2p->state == P2P_PROVISIONING) {
                p2p_dbg(p2p, "Ignore TX callback event - GO Negotiation is not running anymore");
                return;
        }
        p2p_set_state(p2p, P2P_CONNECT);
        p2p_set_timeout(p2p, 0, 500000);
}


static void p2p_go_neg_resp_failure_cb(struct p2p_data *p2p, int success,
                                       const u8 *addr)
{
        p2p_dbg(p2p, "GO Negotiation Response (failure) TX callback: success=%d", success);
        if (p2p->go_neg_peer && p2p->go_neg_peer->status != P2P_SC_SUCCESS) {
                p2p_go_neg_failed(p2p, p2p->go_neg_peer->status);
        } else if (success) {
                struct p2p_device *dev;
                dev = p2p_get_device(p2p, addr);
                if (dev &&
                    dev->status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE)
                        dev->flags |= P2P_DEV_PEER_WAITING_RESPONSE;
        }
}


static void p2p_go_neg_conf_cb(struct p2p_data *p2p,
                               enum p2p_send_action_result result)
{
        struct p2p_device *dev;

        p2p_dbg(p2p, "GO Negotiation Confirm TX callback: result=%d", result);
        if (result == P2P_SEND_ACTION_FAILED) {
                p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
                p2p_go_neg_failed(p2p, -1);
                return;
        }

        dev = p2p->go_neg_peer;

        if (result == P2P_SEND_ACTION_NO_ACK) {
                /*
                 * Retry GO Negotiation Confirmation
                 * P2P_GO_NEG_CNF_MAX_RETRY_COUNT times if we did not receive
                 * ACK for confirmation.
                 */
                if (dev && dev->go_neg_conf &&
                    dev->go_neg_conf_sent <= P2P_GO_NEG_CNF_MAX_RETRY_COUNT) {
                        p2p_dbg(p2p, "GO Negotiation Confirm retry %d",
                                dev->go_neg_conf_sent);
                        p2p->pending_action_state = P2P_PENDING_GO_NEG_CONFIRM;
                        if (p2p_send_action(p2p, dev->go_neg_conf_freq,
                                            dev->info.p2p_device_addr,
                                            p2p->cfg->dev_addr,
                                            dev->info.p2p_device_addr,
                                            wpabuf_head(dev->go_neg_conf),
                                            wpabuf_len(dev->go_neg_conf), 0) >=
                            0) {
                                dev->go_neg_conf_sent++;
                                return;
                        }
                        p2p_dbg(p2p, "Failed to re-send Action frame");

                        /*
                         * Continue with the assumption that the first attempt
                         * went through and just the ACK frame was lost.
                         */
                }

                /*
                 * It looks like the TX status for GO Negotiation Confirm is
                 * often showing failure even when the peer has actually
                 * received the frame. Since the peer may change channels
                 * immediately after having received the frame, we may not see
                 * an Ack for retries, so just dropping a single frame may
                 * trigger this. To allow the group formation to succeed if the
                 * peer did indeed receive the frame, continue regardless of
                 * the TX status.
                 */
                p2p_dbg(p2p, "Assume GO Negotiation Confirm TX was actually received by the peer even though Ack was not reported");
        }

        p2p->cfg->send_action_done(p2p->cfg->cb_ctx);

        if (dev == NULL)
                return;

        p2p_go_complete(p2p, dev);
}


void p2p_send_action_cb(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
                        const u8 *src, const u8 *bssid,
                        enum p2p_send_action_result result)
{
        enum p2p_pending_action_state state;
        int success;

        p2p_dbg(p2p, "Action frame TX callback (state=%d freq=%u dst=" MACSTR
                " src=" MACSTR " bssid=" MACSTR " result=%d p2p_state=%s)",
                p2p->pending_action_state, freq, MAC2STR(dst), MAC2STR(src),
                MAC2STR(bssid), result, p2p_state_txt(p2p->state));
        success = result == P2P_SEND_ACTION_SUCCESS;
        state = p2p->pending_action_state;
        p2p->pending_action_state = P2P_NO_PENDING_ACTION;
        switch (state) {
        case P2P_NO_PENDING_ACTION:
                if (p2p->send_action_in_progress) {
                        p2p->send_action_in_progress = 0;
                        p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
                }
                if (p2p->after_scan_tx_in_progress) {
                        p2p->after_scan_tx_in_progress = 0;
                        if (p2p->start_after_scan != P2P_AFTER_SCAN_NOTHING &&
                            p2p_run_after_scan(p2p))
                                break;
                        if (p2p->state == P2P_SEARCH) {
                                p2p_dbg(p2p, "Continue find after after_scan_tx completion");
                                p2p_continue_find(p2p);
                        }
                }
                break;
        case P2P_PENDING_GO_NEG_REQUEST:
                p2p_go_neg_req_cb(p2p, success);
                break;
        case P2P_PENDING_GO_NEG_RESPONSE:
                p2p_go_neg_resp_cb(p2p, success);
                break;
        case P2P_PENDING_GO_NEG_RESPONSE_FAILURE:
                p2p_go_neg_resp_failure_cb(p2p, success, dst);
                break;
        case P2P_PENDING_GO_NEG_CONFIRM:
                p2p_go_neg_conf_cb(p2p, result);
                break;
        case P2P_PENDING_SD:
                p2p_sd_cb(p2p, success);
                break;
        case P2P_PENDING_PD:
                p2p_prov_disc_cb(p2p, success);
                break;
        case P2P_PENDING_INVITATION_REQUEST:
                p2p_invitation_req_cb(p2p, success);
                break;
        case P2P_PENDING_INVITATION_RESPONSE:
                p2p_invitation_resp_cb(p2p, success);
                break;
        case P2P_PENDING_DEV_DISC_REQUEST:
                p2p_dev_disc_req_cb(p2p, success);
                break;
        case P2P_PENDING_DEV_DISC_RESPONSE:
                p2p_dev_disc_resp_cb(p2p, success);
                break;
        case P2P_PENDING_GO_DISC_REQ:
                p2p_go_disc_req_cb(p2p, success);
                break;
        }

        p2p->after_scan_tx_in_progress = 0;
}


void p2p_listen_cb(struct p2p_data *p2p, unsigned int freq,
                   unsigned int duration)
{
        if (freq == p2p->pending_client_disc_freq) {
                p2p_dbg(p2p, "Client discoverability remain-awake completed");
                p2p->pending_client_disc_freq = 0;
                return;
        }

        if (freq != p2p->pending_listen_freq) {
                p2p_dbg(p2p, "Unexpected listen callback for freq=%u duration=%u (pending_listen_freq=%u)",
                        freq, duration, p2p->pending_listen_freq);
                return;
        }

        p2p_dbg(p2p, "Starting Listen timeout(%u,%u) on freq=%u based on callback",
                p2p->pending_listen_sec, p2p->pending_listen_usec,
                p2p->pending_listen_freq);
        p2p->in_listen = 1;
        p2p->drv_in_listen = freq;
        if (p2p->pending_listen_sec || p2p->pending_listen_usec) {
                /*
                 * Add 20 msec extra wait to avoid race condition with driver
                 * remain-on-channel end event, i.e., give driver more time to
                 * complete the operation before our timeout expires.
                 */
                p2p_set_timeout(p2p, p2p->pending_listen_sec,
                                p2p->pending_listen_usec + 20000);
        }

        p2p->pending_listen_freq = 0;
}


int p2p_listen_end(struct p2p_data *p2p, unsigned int freq)
{
        p2p_dbg(p2p, "Driver ended Listen state (freq=%u)", freq);
        p2p->drv_in_listen = 0;
        if (p2p->in_listen)
                return 0; /* Internal timeout will trigger the next step */

        if (p2p->state == P2P_CONNECT_LISTEN && p2p->go_neg_peer) {
                if (p2p->go_neg_peer->connect_reqs >= 120) {
                        p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
                        p2p_go_neg_failed(p2p, -1);
                        return 0;
                }

                p2p_set_state(p2p, P2P_CONNECT);
                p2p_connect_send(p2p, p2p->go_neg_peer);
                return 1;
        } else if (p2p->state == P2P_SEARCH) {
                if (p2p->p2p_scan_running) {
                         /*
                          * Search is already in progress. This can happen if
                          * an Action frame RX is reported immediately after
                          * the end of a remain-on-channel operation and the
                          * response frame to that is sent using an offchannel
                          * operation while in p2p_find. Avoid an attempt to
                          * restart a scan here.
                          */
                        p2p_dbg(p2p, "p2p_scan already in progress - do not try to start a new one");
                        return 1;
                }
                if (p2p->pending_listen_freq) {
                        /*
                         * Better wait a bit if the driver is unable to start
                         * offchannel operation for some reason. p2p_search()
                         * will be started from internal timeout.
                         */
                        p2p_dbg(p2p, "Listen operation did not seem to start - delay search phase to avoid busy loop");
                        p2p_set_timeout(p2p, 0, 100000);
                        return 1;
                }
                if (p2p->search_delay) {
                        p2p_dbg(p2p, "Delay search operation by %u ms",
                                p2p->search_delay);
                        p2p_set_timeout(p2p, p2p->search_delay / 1000,
                                        (p2p->search_delay % 1000) * 1000);
                        return 1;
                }
                p2p_search(p2p);
                return 1;
        }

        return 0;
}


static void p2p_timeout_connect(struct p2p_data *p2p)
{
        p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
        if (p2p->go_neg_peer &&
            (p2p->go_neg_peer->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM)) {
                p2p_dbg(p2p, "Wait for GO Negotiation Confirm timed out - assume GO Negotiation failed");
                p2p_go_neg_failed(p2p, -1);
                return;
        }
        if (p2p->go_neg_peer &&
            (p2p->go_neg_peer->flags & P2P_DEV_PEER_WAITING_RESPONSE) &&
            p2p->go_neg_peer->connect_reqs < 120) {
                p2p_dbg(p2p, "Peer expected to wait our response - skip listen");
                p2p_connect_send(p2p, p2p->go_neg_peer);
                return;
        }
        if (p2p->go_neg_peer && p2p->go_neg_peer->oob_go_neg_freq > 0) {
                p2p_dbg(p2p, "Skip connect-listen since GO Neg channel known (OOB)");
                p2p_set_state(p2p, P2P_CONNECT_LISTEN);
                p2p_set_timeout(p2p, 0, 30000);
                return;
        }
        p2p_set_state(p2p, P2P_CONNECT_LISTEN);
        p2p_listen_in_find(p2p, 0);
}


static void p2p_timeout_connect_listen(struct p2p_data *p2p)
{
        if (p2p->go_neg_peer) {
                if (p2p->drv_in_listen) {
                        p2p_dbg(p2p, "Driver is still in Listen state; wait for it to complete");
                        return;
                }

                if (p2p->go_neg_peer->connect_reqs >= 120) {
                        p2p_dbg(p2p, "Timeout on sending GO Negotiation Request without getting response");
                        p2p_go_neg_failed(p2p, -1);
                        return;
                }

                p2p_set_state(p2p, P2P_CONNECT);
                p2p_connect_send(p2p, p2p->go_neg_peer);
        } else
                p2p_set_state(p2p, P2P_IDLE);
}


static void p2p_timeout_wait_peer_connect(struct p2p_data *p2p)
{
        p2p_set_state(p2p, P2P_WAIT_PEER_IDLE);

        if (p2p->cfg->is_concurrent_session_active &&
            p2p->cfg->is_concurrent_session_active(p2p->cfg->cb_ctx))
                p2p_set_timeout(p2p, 0, 500000);
        else
                p2p_set_timeout(p2p, 0, 200000);
}


static void p2p_timeout_wait_peer_idle(struct p2p_data *p2p)
{
        struct p2p_device *dev = p2p->go_neg_peer;

        if (dev == NULL) {
                p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait");
                return;
        }

        p2p_dbg(p2p, "Go to Listen state while waiting for the peer to become ready for GO Negotiation");
        p2p_set_state(p2p, P2P_WAIT_PEER_CONNECT);
        p2p_listen_in_find(p2p, 0);
}


static void p2p_timeout_sd_during_find(struct p2p_data *p2p)
{
        p2p_dbg(p2p, "Service Discovery Query timeout");
        if (p2p->sd_peer) {
                p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
                p2p->sd_peer = NULL;
        }
        p2p_continue_find(p2p);
}


static void p2p_timeout_prov_disc_during_find(struct p2p_data *p2p)
{
        p2p_dbg(p2p, "Provision Discovery Request timeout");
        p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
        p2p_continue_find(p2p);
}


static void p2p_timeout_prov_disc_req(struct p2p_data *p2p)
{
        p2p->pending_action_state = P2P_NO_PENDING_ACTION;

        /*
         * For user initiated PD requests that we have not gotten any responses
         * for while in IDLE state, we retry them a couple of times before
         * giving up.
         */
        if (!p2p->user_initiated_pd)
                return;

        p2p_dbg(p2p, "User initiated Provision Discovery Request timeout");

        if (p2p->pd_retries) {
                p2p->pd_retries--;
                p2p_retry_pd(p2p);
        } else {
                struct p2p_device *dev;
                int for_join = 0;

                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) != 0)
                                continue;
                        if (dev->req_config_methods &&
                            (dev->flags & P2P_DEV_PD_FOR_JOIN))
                                for_join = 1;
                }

                if (p2p->cfg->prov_disc_fail)
                        p2p->cfg->prov_disc_fail(p2p->cfg->cb_ctx,
                                                 p2p->pending_pd_devaddr,
                                                 for_join ?
                                                 P2P_PROV_DISC_TIMEOUT_JOIN :
                                                 P2P_PROV_DISC_TIMEOUT);
                p2p_reset_pending_pd(p2p);
        }
}


static void p2p_timeout_invite(struct p2p_data *p2p)
{
        p2p->cfg->send_action_done(p2p->cfg->cb_ctx);
        p2p_set_state(p2p, P2P_INVITE_LISTEN);
        if (p2p->inv_role == P2P_INVITE_ROLE_ACTIVE_GO) {
                /*
                 * Better remain on operating channel instead of listen channel
                 * when running a group.
                 */
                p2p_dbg(p2p, "Inviting in active GO role - wait on operating channel");
                p2p_set_timeout(p2p, 0, 100000);
                return;
        }
        p2p_listen_in_find(p2p, 0);
}


static void p2p_timeout_invite_listen(struct p2p_data *p2p)
{
        if (p2p->invite_peer && p2p->invite_peer->invitation_reqs < 100) {
                p2p_set_state(p2p, P2P_INVITE);
                p2p_invite_send(p2p, p2p->invite_peer,
                                p2p->invite_go_dev_addr, p2p->invite_dev_pw_id);
        } else {
                if (p2p->invite_peer) {
                        p2p_dbg(p2p, "Invitation Request retry limit reached");
                        if (p2p->cfg->invitation_result)
                                p2p->cfg->invitation_result(
                                        p2p->cfg->cb_ctx, -1, NULL, NULL,
                                        p2p->invite_peer->info.p2p_device_addr,
                                        0, 0);
                }
                p2p_set_state(p2p, P2P_IDLE);
        }
}


static void p2p_state_timeout(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;

        p2p_dbg(p2p, "Timeout (state=%s)", p2p_state_txt(p2p->state));

        p2p->in_listen = 0;
        if (p2p->drv_in_listen) {
                p2p_dbg(p2p, "Driver is still in listen state - stop it");
                p2p->cfg->stop_listen(p2p->cfg->cb_ctx);
        }

        switch (p2p->state) {
        case P2P_IDLE:
                /* Check if we timed out waiting for PD req */
                if (p2p->pending_action_state == P2P_PENDING_PD)
                        p2p_timeout_prov_disc_req(p2p);
                break;
        case P2P_SEARCH:
                /* Check if we timed out waiting for PD req */
                if (p2p->pending_action_state == P2P_PENDING_PD)
                        p2p_timeout_prov_disc_req(p2p);
                if (p2p->search_delay && !p2p->in_search_delay) {
                        p2p_dbg(p2p, "Delay search operation by %u ms",
                                p2p->search_delay);
                        p2p->in_search_delay = 1;
                        p2p_set_timeout(p2p, p2p->search_delay / 1000,
                                        (p2p->search_delay % 1000) * 1000);
                        break;
                }
                p2p->in_search_delay = 0;
                p2p_search(p2p);
                break;
        case P2P_CONNECT:
                p2p_timeout_connect(p2p);
                break;
        case P2P_CONNECT_LISTEN:
                p2p_timeout_connect_listen(p2p);
                break;
        case P2P_GO_NEG:
                break;
        case P2P_LISTEN_ONLY:
                /* Check if we timed out waiting for PD req */
                if (p2p->pending_action_state == P2P_PENDING_PD)
                        p2p_timeout_prov_disc_req(p2p);

                if (p2p->ext_listen_only) {
                        p2p_dbg(p2p, "Extended Listen Timing - Listen State completed");
                        p2p->ext_listen_only = 0;
                        p2p_set_state(p2p, P2P_IDLE);
                }
                break;
        case P2P_WAIT_PEER_CONNECT:
                p2p_timeout_wait_peer_connect(p2p);
                break;
        case P2P_WAIT_PEER_IDLE:
                p2p_timeout_wait_peer_idle(p2p);
                break;
        case P2P_SD_DURING_FIND:
                p2p_timeout_sd_during_find(p2p);
                break;
        case P2P_PROVISIONING:
                break;
        case P2P_PD_DURING_FIND:
                p2p_timeout_prov_disc_during_find(p2p);
                break;
        case P2P_INVITE:
                p2p_timeout_invite(p2p);
                break;
        case P2P_INVITE_LISTEN:
                p2p_timeout_invite_listen(p2p);
                break;
        }
}


int p2p_reject(struct p2p_data *p2p, const u8 *peer_addr)
{
        struct p2p_device *dev;

        dev = p2p_get_device(p2p, peer_addr);
        p2p_dbg(p2p, "Local request to reject connection attempts by peer "
                MACSTR, MAC2STR(peer_addr));
        if (dev == NULL) {
                p2p_dbg(p2p, "Peer " MACSTR " unknown", MAC2STR(peer_addr));
                return -1;
        }
        dev->status = P2P_SC_FAIL_REJECTED_BY_USER;
        dev->flags |= P2P_DEV_USER_REJECTED;
        return 0;
}


const char * p2p_wps_method_text(enum p2p_wps_method method)
{
        switch (method) {
        case WPS_NOT_READY:
                return "not-ready";
        case WPS_PIN_DISPLAY:
                return "Display";
        case WPS_PIN_KEYPAD:
                return "Keypad";
        case WPS_PBC:
                return "PBC";
        case WPS_NFC:
                return "NFC";
        }

        return "??";
}


static const char * p2p_go_state_text(enum p2p_go_state go_state)
{
        switch (go_state) {
        case UNKNOWN_GO:
                return "unknown";
        case LOCAL_GO:
                return "local";
        case  REMOTE_GO:
                return "remote";
        }

        return "??";
}


const struct p2p_peer_info * p2p_get_peer_info(struct p2p_data *p2p,
                                               const u8 *addr, int next)
{
        struct p2p_device *dev;

        if (addr)
                dev = p2p_get_device(p2p, addr);
        else
                dev = dl_list_first(&p2p->devices, struct p2p_device, list);

        if (dev && next) {
                dev = dl_list_first(&dev->list, struct p2p_device, list);
                if (&dev->list == &p2p->devices)
                        dev = NULL;
        }

        if (dev == NULL)
                return NULL;

        return &dev->info;
}


int p2p_get_peer_info_txt(const struct p2p_peer_info *info,
                          char *buf, size_t buflen)
{
        struct p2p_device *dev;
        int res;
        char *pos, *end;
        struct os_reltime now;

        if (info == NULL)
                return -1;

        dev = (struct p2p_device *) (((u8 *) info) -
                                     offsetof(struct p2p_device, info));

        pos = buf;
        end = buf + buflen;

        os_get_reltime(&now);
        res = os_snprintf(pos, end - pos,
                          "age=%d\n"
                          "listen_freq=%d\n"
                          "wps_method=%s\n"
                          "interface_addr=" MACSTR "\n"
                          "member_in_go_dev=" MACSTR "\n"
                          "member_in_go_iface=" MACSTR "\n"
                          "go_neg_req_sent=%d\n"
                          "go_state=%s\n"
                          "dialog_token=%u\n"
                          "intended_addr=" MACSTR "\n"
                          "country=%c%c\n"
                          "oper_freq=%d\n"
                          "req_config_methods=0x%x\n"
                          "flags=%s%s%s%s%s%s%s%s%s%s%s%s%s\n"
                          "status=%d\n"
                          "invitation_reqs=%u\n",
                          (int) (now.sec - dev->last_seen.sec),
                          dev->listen_freq,
                          p2p_wps_method_text(dev->wps_method),
                          MAC2STR(dev->interface_addr),
                          MAC2STR(dev->member_in_go_dev),
                          MAC2STR(dev->member_in_go_iface),
                          dev->go_neg_req_sent,
                          p2p_go_state_text(dev->go_state),
                          dev->dialog_token,
                          MAC2STR(dev->intended_addr),
                          dev->country[0] ? dev->country[0] : '_',
                          dev->country[1] ? dev->country[1] : '_',
                          dev->oper_freq,
                          dev->req_config_methods,
                          dev->flags & P2P_DEV_PROBE_REQ_ONLY ?
                          "[PROBE_REQ_ONLY]" : "",
                          dev->flags & P2P_DEV_REPORTED ? "[REPORTED]" : "",
                          dev->flags & P2P_DEV_NOT_YET_READY ?
                          "[NOT_YET_READY]" : "",
                          dev->flags & P2P_DEV_PD_PEER_DISPLAY ?
                          "[PD_PEER_DISPLAY]" : "",
                          dev->flags & P2P_DEV_PD_PEER_KEYPAD ?
                          "[PD_PEER_KEYPAD]" : "",
                          dev->flags & P2P_DEV_USER_REJECTED ?
                          "[USER_REJECTED]" : "",
                          dev->flags & P2P_DEV_PEER_WAITING_RESPONSE ?
                          "[PEER_WAITING_RESPONSE]" : "",
                          dev->flags & P2P_DEV_PREFER_PERSISTENT_GROUP ?
                          "[PREFER_PERSISTENT_GROUP]" : "",
                          dev->flags & P2P_DEV_WAIT_GO_NEG_RESPONSE ?
                          "[WAIT_GO_NEG_RESPONSE]" : "",
                          dev->flags & P2P_DEV_WAIT_GO_NEG_CONFIRM ?
                          "[WAIT_GO_NEG_CONFIRM]" : "",
                          dev->flags & P2P_DEV_GROUP_CLIENT_ONLY ?
                          "[GROUP_CLIENT_ONLY]" : "",
                          dev->flags & P2P_DEV_FORCE_FREQ ?
                          "[FORCE_FREQ]" : "",
                          dev->flags & P2P_DEV_PD_FOR_JOIN ?
                          "[PD_FOR_JOIN]" : "",
                          dev->status,
                          dev->invitation_reqs);
        if (os_snprintf_error(end - pos, res))
                return pos - buf;
        pos += res;

        if (dev->ext_listen_period) {
                res = os_snprintf(pos, end - pos,
                                  "ext_listen_period=%u\n"
                                  "ext_listen_interval=%u\n",
                                  dev->ext_listen_period,
                                  dev->ext_listen_interval);
                if (os_snprintf_error(end - pos, res))
                        return pos - buf;
                pos += res;
        }

        if (dev->oper_ssid_len) {
                res = os_snprintf(pos, end - pos,
                                  "oper_ssid=%s\n",
                                  wpa_ssid_txt(dev->oper_ssid,
                                               dev->oper_ssid_len));
                if (os_snprintf_error(end - pos, res))
                        return pos - buf;
                pos += res;
        }

#ifdef CONFIG_WIFI_DISPLAY
        if (dev->info.wfd_subelems) {
                res = os_snprintf(pos, end - pos, "wfd_subelems=");
                if (os_snprintf_error(end - pos, res))
                        return pos - buf;
                pos += res;

                pos += wpa_snprintf_hex(pos, end - pos,
                                        wpabuf_head(dev->info.wfd_subelems),
                                        wpabuf_len(dev->info.wfd_subelems));

                res = os_snprintf(pos, end - pos, "\n");
                if (os_snprintf_error(end - pos, res))
                        return pos - buf;
                pos += res;
        }
#endif /* CONFIG_WIFI_DISPLAY */

        return pos - buf;
}


int p2p_peer_known(struct p2p_data *p2p, const u8 *addr)
{
        return p2p_get_device(p2p, addr) != NULL;
}


void p2p_set_client_discoverability(struct p2p_data *p2p, int enabled)
{
        if (enabled) {
                p2p_dbg(p2p, "Client discoverability enabled");
                p2p->dev_capab |= P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
        } else {
                p2p_dbg(p2p, "Client discoverability disabled");
                p2p->dev_capab &= ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY;
        }
}


static struct wpabuf * p2p_build_presence_req(u32 duration1, u32 interval1,
                                              u32 duration2, u32 interval2)
{
        struct wpabuf *req;
        struct p2p_noa_desc desc1, desc2, *ptr1 = NULL, *ptr2 = NULL;
        u8 *len;

        req = wpabuf_alloc(100);
        if (req == NULL)
                return NULL;

        if (duration1 || interval1) {
                os_memset(&desc1, 0, sizeof(desc1));
                desc1.count_type = 1;
                desc1.duration = duration1;
                desc1.interval = interval1;
                ptr1 = &desc1;

                if (duration2 || interval2) {
                        os_memset(&desc2, 0, sizeof(desc2));
                        desc2.count_type = 2;
                        desc2.duration = duration2;
                        desc2.interval = interval2;
                        ptr2 = &desc2;
                }
        }

        p2p_buf_add_action_hdr(req, P2P_PRESENCE_REQ, 1);
        len = p2p_buf_add_ie_hdr(req);
        p2p_buf_add_noa(req, 0, 0, 0, ptr1, ptr2);
        p2p_buf_update_ie_hdr(req, len);

        return req;
}


int p2p_presence_req(struct p2p_data *p2p, const u8 *go_interface_addr,
                     const u8 *own_interface_addr, unsigned int freq,
                     u32 duration1, u32 interval1, u32 duration2,
                     u32 interval2)
{
        struct wpabuf *req;

        p2p_dbg(p2p, "Send Presence Request to GO " MACSTR
                " (own interface " MACSTR ") freq=%u dur1=%u int1=%u "
                "dur2=%u int2=%u",
                MAC2STR(go_interface_addr), MAC2STR(own_interface_addr),
                freq, duration1, interval1, duration2, interval2);

        req = p2p_build_presence_req(duration1, interval1, duration2,
                                     interval2);
        if (req == NULL)
                return -1;

        p2p->pending_action_state = P2P_NO_PENDING_ACTION;
        if (p2p_send_action(p2p, freq, go_interface_addr, own_interface_addr,
                            go_interface_addr,
                            wpabuf_head(req), wpabuf_len(req), 200) < 0) {
                p2p_dbg(p2p, "Failed to send Action frame");
        }
        wpabuf_free(req);

        return 0;
}


static struct wpabuf * p2p_build_presence_resp(u8 status, const u8 *noa,
                                               size_t noa_len, u8 dialog_token)
{
        struct wpabuf *resp;
        u8 *len;

        resp = wpabuf_alloc(100 + noa_len);
        if (resp == NULL)
                return NULL;

        p2p_buf_add_action_hdr(resp, P2P_PRESENCE_RESP, dialog_token);
        len = p2p_buf_add_ie_hdr(resp);
        p2p_buf_add_status(resp, status);
        if (noa) {
                wpabuf_put_u8(resp, P2P_ATTR_NOTICE_OF_ABSENCE);
                wpabuf_put_le16(resp, noa_len);
                wpabuf_put_data(resp, noa, noa_len);
        } else
                p2p_buf_add_noa(resp, 0, 0, 0, NULL, NULL);
        p2p_buf_update_ie_hdr(resp, len);

        return resp;
}


static void p2p_process_presence_req(struct p2p_data *p2p, const u8 *da,
                                     const u8 *sa, const u8 *data, size_t len,
                                     int rx_freq)
{
        struct p2p_message msg;
        u8 status;
        struct wpabuf *resp;
        size_t g;
        struct p2p_group *group = NULL;
        int parsed = 0;
        u8 noa[50];
        int noa_len;

        p2p_dbg(p2p, "Received P2P Action - P2P Presence Request");

        for (g = 0; g < p2p->num_groups; g++) {
                if (os_memcmp(da, p2p_group_get_interface_addr(p2p->groups[g]),
                              ETH_ALEN) == 0) {
                        group = p2p->groups[g];
                        break;
                }
        }
        if (group == NULL) {
                p2p_dbg(p2p, "Ignore P2P Presence Request for unknown group "
                        MACSTR, MAC2STR(da));
                return;
        }

        if (p2p_parse(data, len, &msg) < 0) {
                p2p_dbg(p2p, "Failed to parse P2P Presence Request");
                status = P2P_SC_FAIL_INVALID_PARAMS;
                goto fail;
        }
        parsed = 1;

        if (msg.noa == NULL) {
                p2p_dbg(p2p, "No NoA attribute in P2P Presence Request");
                status = P2P_SC_FAIL_INVALID_PARAMS;
                goto fail;
        }

        status = p2p_group_presence_req(group, sa, msg.noa, msg.noa_len);

fail:
        if (p2p->cfg->get_noa)
                noa_len = p2p->cfg->get_noa(p2p->cfg->cb_ctx, da, noa,
                                            sizeof(noa));
        else
                noa_len = -1;
        resp = p2p_build_presence_resp(status, noa_len > 0 ? noa : NULL,
                                       noa_len > 0 ? noa_len : 0,
                                       msg.dialog_token);
        if (parsed)
                p2p_parse_free(&msg);
        if (resp == NULL)
                return;

        p2p->pending_action_state = P2P_NO_PENDING_ACTION;
        if (p2p_send_action(p2p, rx_freq, sa, da, da,
                            wpabuf_head(resp), wpabuf_len(resp), 200) < 0) {
                p2p_dbg(p2p, "Failed to send Action frame");
        }
        wpabuf_free(resp);
}


static void p2p_process_presence_resp(struct p2p_data *p2p, const u8 *da,
                                      const u8 *sa, const u8 *data, size_t len)
{
        struct p2p_message msg;

        p2p_dbg(p2p, "Received P2P Action - P2P Presence Response");

        if (p2p_parse(data, len, &msg) < 0) {
                p2p_dbg(p2p, "Failed to parse P2P Presence Response");
                return;
        }

        if (msg.status == NULL || msg.noa == NULL) {
                p2p_dbg(p2p, "No Status or NoA attribute in P2P Presence Response");
                p2p_parse_free(&msg);
                return;
        }

        if (p2p->cfg->presence_resp) {
                p2p->cfg->presence_resp(p2p->cfg->cb_ctx, sa, *msg.status,
                                        msg.noa, msg.noa_len);
        }

        if (*msg.status) {
                p2p_dbg(p2p, "P2P Presence Request was rejected: status %u",
                        *msg.status);
                p2p_parse_free(&msg);
                return;
        }

        p2p_dbg(p2p, "P2P Presence Request was accepted");
        wpa_hexdump(MSG_DEBUG, "P2P: P2P Presence Response - NoA",
                    msg.noa, msg.noa_len);
        /* TODO: process NoA */
        p2p_parse_free(&msg);
}


static void p2p_ext_listen_timeout(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;

        if (p2p->ext_listen_interval) {
                /* Schedule next extended listen timeout */
                eloop_register_timeout(p2p->ext_listen_interval_sec,
                                       p2p->ext_listen_interval_usec,
                                       p2p_ext_listen_timeout, p2p, NULL);
        }

        if ((p2p->cfg->is_p2p_in_progress &&
             p2p->cfg->is_p2p_in_progress(p2p->cfg->cb_ctx)) ||
            (p2p->pending_action_state == P2P_PENDING_PD &&
             p2p->pd_retries > 0)) {
                p2p_dbg(p2p, "Operation in progress - skip Extended Listen timeout (%s)",
                        p2p_state_txt(p2p->state));
                return;
        }

        if (p2p->state == P2P_LISTEN_ONLY && p2p->ext_listen_only) {
                /*
                 * This should not really happen, but it looks like the Listen
                 * command may fail is something else (e.g., a scan) was
                 * running at an inconvenient time. As a workaround, allow new
                 * Extended Listen operation to be started.
                 */
                p2p_dbg(p2p, "Previous Extended Listen operation had not been completed - try again");
                p2p->ext_listen_only = 0;
                p2p_set_state(p2p, P2P_IDLE);
        }

        if (p2p->state != P2P_IDLE) {
                p2p_dbg(p2p, "Skip Extended Listen timeout in active state (%s)", p2p_state_txt(p2p->state));
                return;
        }

        p2p_dbg(p2p, "Extended Listen timeout");
        p2p->ext_listen_only = 1;
        if (p2p_listen(p2p, p2p->ext_listen_period) < 0) {
                p2p_dbg(p2p, "Failed to start Listen state for Extended Listen Timing");
                p2p->ext_listen_only = 0;
        }
}


int p2p_ext_listen(struct p2p_data *p2p, unsigned int period,
                   unsigned int interval)
{
        if (period > 65535 || interval > 65535 || period > interval ||
            (period == 0 && interval > 0) || (period > 0 && interval == 0)) {
                p2p_dbg(p2p, "Invalid Extended Listen Timing request: period=%u interval=%u",
                        period, interval);
                return -1;
        }

        eloop_cancel_timeout(p2p_ext_listen_timeout, p2p, NULL);

        if (interval == 0) {
                p2p_dbg(p2p, "Disabling Extended Listen Timing");
                p2p->ext_listen_period = 0;
                p2p->ext_listen_interval = 0;
                return 0;
        }

        p2p_dbg(p2p, "Enabling Extended Listen Timing: period %u msec, interval %u msec",
                period, interval);
        p2p->ext_listen_period = period;
        p2p->ext_listen_interval = interval;
        p2p->ext_listen_interval_sec = interval / 1000;
        p2p->ext_listen_interval_usec = (interval % 1000) * 1000;

        eloop_register_timeout(p2p->ext_listen_interval_sec,
                               p2p->ext_listen_interval_usec,
                               p2p_ext_listen_timeout, p2p, NULL);

        return 0;
}


void p2p_deauth_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
                      const u8 *ie, size_t ie_len)
{
        struct p2p_message msg;

        if (bssid == NULL || ie == NULL)
                return;

        os_memset(&msg, 0, sizeof(msg));
        if (p2p_parse_ies(ie, ie_len, &msg))
                return;
        if (msg.minor_reason_code == NULL) {
                p2p_parse_free(&msg);
                return;
        }

        p2p_dbg(p2p, "Deauthentication notification BSSID " MACSTR
                " reason_code=%u minor_reason_code=%u",
                MAC2STR(bssid), reason_code, *msg.minor_reason_code);

        p2p_parse_free(&msg);
}


void p2p_disassoc_notif(struct p2p_data *p2p, const u8 *bssid, u16 reason_code,
                        const u8 *ie, size_t ie_len)
{
        struct p2p_message msg;

        if (bssid == NULL || ie == NULL)
                return;

        os_memset(&msg, 0, sizeof(msg));
        if (p2p_parse_ies(ie, ie_len, &msg))
                return;
        if (msg.minor_reason_code == NULL) {
                p2p_parse_free(&msg);
                return;
        }

        p2p_dbg(p2p, "Disassociation notification BSSID " MACSTR
                " reason_code=%u minor_reason_code=%u",
                MAC2STR(bssid), reason_code, *msg.minor_reason_code);

        p2p_parse_free(&msg);
}


void p2p_set_managed_oper(struct p2p_data *p2p, int enabled)
{
        if (enabled) {
                p2p_dbg(p2p, "Managed P2P Device operations enabled");
                p2p->dev_capab |= P2P_DEV_CAPAB_INFRA_MANAGED;
        } else {
                p2p_dbg(p2p, "Managed P2P Device operations disabled");
                p2p->dev_capab &= ~P2P_DEV_CAPAB_INFRA_MANAGED;
        }
}


int p2p_config_get_random_social(struct p2p_config *p2p, u8 *op_class,
                                 u8 *op_channel)
{
        return p2p_channel_random_social(&p2p->channels, op_class, op_channel);
}


int p2p_set_listen_channel(struct p2p_data *p2p, u8 reg_class, u8 channel,
                           u8 forced)
{
        if (p2p_channel_to_freq(reg_class, channel) < 0)
                return -1;

        p2p_dbg(p2p, "Set Listen channel: reg_class %u channel %u",
                reg_class, channel);

        /*
         * Listen channel was set in configuration or set by control interface;
         * cannot override it.
         */
        if (p2p->cfg->channel_forced && forced == 0)
                return -1;

        if (p2p->state == P2P_IDLE) {
                p2p->cfg->reg_class = reg_class;
                p2p->cfg->channel = channel;
                p2p->cfg->channel_forced = forced;
        } else {
                p2p_dbg(p2p, "Defer setting listen channel");
                p2p->pending_reg_class = reg_class;
                p2p->pending_channel = channel;
                p2p->pending_channel_forced = forced;
        }

        return 0;
}


u8 p2p_get_listen_channel(struct p2p_data *p2p)
{
        return p2p->cfg->channel;
}


int p2p_set_ssid_postfix(struct p2p_data *p2p, const u8 *postfix, size_t len)
{
        p2p_dbg(p2p, "New SSID postfix: %s", wpa_ssid_txt(postfix, len));
        if (postfix == NULL) {
                p2p->cfg->ssid_postfix_len = 0;
                return 0;
        }
        if (len > sizeof(p2p->cfg->ssid_postfix))
                return -1;
        os_memcpy(p2p->cfg->ssid_postfix, postfix, len);
        p2p->cfg->ssid_postfix_len = len;
        return 0;
}


int p2p_set_oper_channel(struct p2p_data *p2p, u8 op_reg_class, u8 op_channel,
                         int cfg_op_channel)
{
        if (p2p_channel_to_freq(op_reg_class, op_channel) < 0)
                return -1;

        p2p_dbg(p2p, "Set Operating channel: reg_class %u channel %u",
                op_reg_class, op_channel);
        p2p->cfg->op_reg_class = op_reg_class;
        p2p->cfg->op_channel = op_channel;
        p2p->cfg->cfg_op_channel = cfg_op_channel;
        return 0;
}


int p2p_set_pref_chan(struct p2p_data *p2p, unsigned int num_pref_chan,
                      const struct p2p_channel *pref_chan)
{
        struct p2p_channel *n;

        if (pref_chan) {
                n = os_malloc(num_pref_chan * sizeof(struct p2p_channel));
                if (n == NULL)
                        return -1;
                os_memcpy(n, pref_chan,
                          num_pref_chan * sizeof(struct p2p_channel));
        } else
                n = NULL;

        os_free(p2p->cfg->pref_chan);
        p2p->cfg->pref_chan = n;
        p2p->cfg->num_pref_chan = num_pref_chan;

        return 0;
}


int p2p_set_no_go_freq(struct p2p_data *p2p,
                       const struct wpa_freq_range_list *list)
{
        struct wpa_freq_range *tmp;

        if (list == NULL || list->num == 0) {
                os_free(p2p->no_go_freq.range);
                p2p->no_go_freq.range = NULL;
                p2p->no_go_freq.num = 0;
                return 0;
        }

        tmp = os_calloc(list->num, sizeof(struct wpa_freq_range));
        if (tmp == NULL)
                return -1;
        os_memcpy(tmp, list->range, list->num * sizeof(struct wpa_freq_range));
        os_free(p2p->no_go_freq.range);
        p2p->no_go_freq.range = tmp;
        p2p->no_go_freq.num = list->num;
        p2p_dbg(p2p, "Updated no GO chan list");

        return 0;
}


int p2p_get_interface_addr(struct p2p_data *p2p, const u8 *dev_addr,
                           u8 *iface_addr)
{
        struct p2p_device *dev = p2p_get_device(p2p, dev_addr);
        if (dev == NULL || is_zero_ether_addr(dev->interface_addr))
                return -1;
        os_memcpy(iface_addr, dev->interface_addr, ETH_ALEN);
        return 0;
}


int p2p_get_dev_addr(struct p2p_data *p2p, const u8 *iface_addr,
                           u8 *dev_addr)
{
        struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
        if (dev == NULL)
                return -1;
        os_memcpy(dev_addr, dev->info.p2p_device_addr, ETH_ALEN);
        return 0;
}


void p2p_set_peer_filter(struct p2p_data *p2p, const u8 *addr)
{
        os_memcpy(p2p->peer_filter, addr, ETH_ALEN);
        if (is_zero_ether_addr(p2p->peer_filter))
                p2p_dbg(p2p, "Disable peer filter");
        else
                p2p_dbg(p2p, "Enable peer filter for " MACSTR,
                        MAC2STR(p2p->peer_filter));
}


void p2p_set_cross_connect(struct p2p_data *p2p, int enabled)
{
        p2p_dbg(p2p, "Cross connection %s", enabled ? "enabled" : "disabled");
        if (p2p->cross_connect == enabled)
                return;
        p2p->cross_connect = enabled;
        /* TODO: may need to tear down any action group where we are GO(?) */
}


int p2p_get_oper_freq(struct p2p_data *p2p, const u8 *iface_addr)
{
        struct p2p_device *dev = p2p_get_device_interface(p2p, iface_addr);
        if (dev == NULL)
                return -1;
        if (dev->oper_freq <= 0)
                return -1;
        return dev->oper_freq;
}


void p2p_set_intra_bss_dist(struct p2p_data *p2p, int enabled)
{
        p2p_dbg(p2p, "Intra BSS distribution %s",
                enabled ? "enabled" : "disabled");
        p2p->cfg->p2p_intra_bss = enabled;
}


void p2p_update_channel_list(struct p2p_data *p2p,
                             const struct p2p_channels *chan,
                             const struct p2p_channels *cli_chan)
{
        p2p_dbg(p2p, "Update channel list");
        os_memcpy(&p2p->cfg->channels, chan, sizeof(struct p2p_channels));
        p2p_channels_dump(p2p, "channels", &p2p->cfg->channels);
        os_memcpy(&p2p->cfg->cli_channels, cli_chan,
                  sizeof(struct p2p_channels));
        p2p_channels_dump(p2p, "cli_channels", &p2p->cfg->cli_channels);
}


int p2p_send_action(struct p2p_data *p2p, unsigned int freq, const u8 *dst,
                    const u8 *src, const u8 *bssid, const u8 *buf,
                    size_t len, unsigned int wait_time)
{
        if (p2p->p2p_scan_running) {
                p2p_dbg(p2p, "Delay Action frame TX until p2p_scan completes");
                if (p2p->after_scan_tx) {
                        p2p_dbg(p2p, "Dropped previous pending Action frame TX");
                        os_free(p2p->after_scan_tx);
                }
                p2p->after_scan_tx = os_malloc(sizeof(*p2p->after_scan_tx) +
                                               len);
                if (p2p->after_scan_tx == NULL)
                        return -1;
                p2p->after_scan_tx->freq = freq;
                os_memcpy(p2p->after_scan_tx->dst, dst, ETH_ALEN);
                os_memcpy(p2p->after_scan_tx->src, src, ETH_ALEN);
                os_memcpy(p2p->after_scan_tx->bssid, bssid, ETH_ALEN);
                p2p->after_scan_tx->len = len;
                p2p->after_scan_tx->wait_time = wait_time;
                os_memcpy(p2p->after_scan_tx + 1, buf, len);
                return 0;
        }

        return p2p->cfg->send_action(p2p->cfg->cb_ctx, freq, dst, src, bssid,
                                     buf, len, wait_time);
}


void p2p_set_best_channels(struct p2p_data *p2p, int freq_24, int freq_5,
                           int freq_overall)
{
        p2p_dbg(p2p, "Best channel: 2.4 GHz: %d,  5 GHz: %d,  overall: %d",
                freq_24, freq_5, freq_overall);
        p2p->best_freq_24 = freq_24;
        p2p->best_freq_5 = freq_5;
        p2p->best_freq_overall = freq_overall;
}


void p2p_set_own_freq_preference(struct p2p_data *p2p, int freq)
{
        p2p_dbg(p2p, "Own frequency preference: %d MHz", freq);
        p2p->own_freq_preference = freq;
}


const u8 * p2p_get_go_neg_peer(struct p2p_data *p2p)
{
        if (p2p == NULL || p2p->go_neg_peer == NULL)
                return NULL;
        return p2p->go_neg_peer->info.p2p_device_addr;
}


const struct p2p_peer_info *
p2p_get_peer_found(struct p2p_data *p2p, const u8 *addr, int next)
{
        struct p2p_device *dev;

        if (addr) {
                dev = p2p_get_device(p2p, addr);
                if (!dev)
                        return NULL;

                if (!next) {
                        if (dev->flags & P2P_DEV_PROBE_REQ_ONLY)
                                return NULL;

                        return &dev->info;
                } else {
                        do {
                                dev = dl_list_first(&dev->list,
                                                    struct p2p_device,
                                                    list);
                                if (!dev || &dev->list == &p2p->devices)
                                        return NULL;
                        } while (dev->flags & P2P_DEV_PROBE_REQ_ONLY);
                }
        } else {
                dev = dl_list_first(&p2p->devices, struct p2p_device, list);
                if (!dev)
                        return NULL;
                while (dev->flags & P2P_DEV_PROBE_REQ_ONLY) {
                        dev = dl_list_first(&dev->list,
                                            struct p2p_device,
                                            list);
                        if (!dev || &dev->list == &p2p->devices)
                                return NULL;
                }
        }

        return &dev->info;
}


int p2p_in_progress(struct p2p_data *p2p)
{
        if (p2p == NULL)
                return 0;
        if (p2p->state == P2P_SEARCH)
                return 2;
        return p2p->state != P2P_IDLE && p2p->state != P2P_PROVISIONING;
}


void p2p_set_config_timeout(struct p2p_data *p2p, u8 go_timeout,
                            u8 client_timeout)
{
        if (p2p) {
                p2p->go_timeout = go_timeout;
                p2p->client_timeout = client_timeout;
        }
}


#ifdef CONFIG_WIFI_DISPLAY

static void p2p_update_wfd_ie_groups(struct p2p_data *p2p)
{
        size_t g;
        struct p2p_group *group;

        for (g = 0; g < p2p->num_groups; g++) {
                group = p2p->groups[g];
                p2p_group_force_beacon_update_ies(group);
        }
}


int p2p_set_wfd_ie_beacon(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_beacon);
        p2p->wfd_ie_beacon = ie;
        p2p_update_wfd_ie_groups(p2p);
        return 0;
}


int p2p_set_wfd_ie_probe_req(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_probe_req);
        p2p->wfd_ie_probe_req = ie;
        return 0;
}


int p2p_set_wfd_ie_probe_resp(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_probe_resp);
        p2p->wfd_ie_probe_resp = ie;
        p2p_update_wfd_ie_groups(p2p);
        return 0;
}


int p2p_set_wfd_ie_assoc_req(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_assoc_req);
        p2p->wfd_ie_assoc_req = ie;
        return 0;
}


int p2p_set_wfd_ie_invitation(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_invitation);
        p2p->wfd_ie_invitation = ie;
        return 0;
}


int p2p_set_wfd_ie_prov_disc_req(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_prov_disc_req);
        p2p->wfd_ie_prov_disc_req = ie;
        return 0;
}


int p2p_set_wfd_ie_prov_disc_resp(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_prov_disc_resp);
        p2p->wfd_ie_prov_disc_resp = ie;
        return 0;
}


int p2p_set_wfd_ie_go_neg(struct p2p_data *p2p, struct wpabuf *ie)
{
        wpabuf_free(p2p->wfd_ie_go_neg);
        p2p->wfd_ie_go_neg = ie;
        return 0;
}


int p2p_set_wfd_dev_info(struct p2p_data *p2p, const struct wpabuf *elem)
{
        wpabuf_free(p2p->wfd_dev_info);
        if (elem) {
                p2p->wfd_dev_info = wpabuf_dup(elem);
                if (p2p->wfd_dev_info == NULL)
                        return -1;
        } else
                p2p->wfd_dev_info = NULL;

        return 0;
}


int p2p_set_wfd_assoc_bssid(struct p2p_data *p2p, const struct wpabuf *elem)
{
        wpabuf_free(p2p->wfd_assoc_bssid);
        if (elem) {
                p2p->wfd_assoc_bssid = wpabuf_dup(elem);
                if (p2p->wfd_assoc_bssid == NULL)
                        return -1;
        } else
                p2p->wfd_assoc_bssid = NULL;

        return 0;
}


int p2p_set_wfd_coupled_sink_info(struct p2p_data *p2p,
                                  const struct wpabuf *elem)
{
        wpabuf_free(p2p->wfd_coupled_sink_info);
        if (elem) {
                p2p->wfd_coupled_sink_info = wpabuf_dup(elem);
                if (p2p->wfd_coupled_sink_info == NULL)
                        return -1;
        } else
                p2p->wfd_coupled_sink_info = NULL;

        return 0;
}

#endif /* CONFIG_WIFI_DISPLAY */


int p2p_set_disc_int(struct p2p_data *p2p, int min_disc_int, int max_disc_int,
                     int max_disc_tu)
{
        if (min_disc_int > max_disc_int || min_disc_int < 0 || max_disc_int < 0)
                return -1;

        p2p->min_disc_int = min_disc_int;
        p2p->max_disc_int = max_disc_int;
        p2p->max_disc_tu = max_disc_tu;
        p2p_dbg(p2p, "Set discoverable interval: min=%d max=%d max_tu=%d",
                min_disc_int, max_disc_int, max_disc_tu);

        return 0;
}


void p2p_dbg(struct p2p_data *p2p, const char *fmt, ...)
{
        va_list ap;
        char buf[500];

        if (!p2p->cfg->debug_print)
                return;

        va_start(ap, fmt);
        vsnprintf(buf, sizeof(buf), fmt, ap);
        buf[sizeof(buf) - 1] = '\0';
        va_end(ap);
        p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_DEBUG, buf);
}


void p2p_info(struct p2p_data *p2p, const char *fmt, ...)
{
        va_list ap;
        char buf[500];

        if (!p2p->cfg->debug_print)
                return;

        va_start(ap, fmt);
        vsnprintf(buf, sizeof(buf), fmt, ap);
        buf[sizeof(buf) - 1] = '\0';
        va_end(ap);
        p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_INFO, buf);
}


void p2p_err(struct p2p_data *p2p, const char *fmt, ...)
{
        va_list ap;
        char buf[500];

        if (!p2p->cfg->debug_print)
                return;

        va_start(ap, fmt);
        vsnprintf(buf, sizeof(buf), fmt, ap);
        buf[sizeof(buf) - 1] = '\0';
        va_end(ap);
        p2p->cfg->debug_print(p2p->cfg->cb_ctx, MSG_ERROR, buf);
}


void p2p_loop_on_known_peers(struct p2p_data *p2p,
                             void (*peer_callback)(struct p2p_peer_info *peer,
                                                   void *user_data),
                             void *user_data)
{
        struct p2p_device *dev, *n;

        dl_list_for_each_safe(dev, n, &p2p->devices, struct p2p_device, list) {
                peer_callback(&dev->info, user_data);
        }
}


#ifdef CONFIG_WPS_NFC

static struct wpabuf * p2p_build_nfc_handover(struct p2p_data *p2p,
                                              int client_freq,
                                              const u8 *go_dev_addr,
                                              const u8 *ssid, size_t ssid_len)
{
        struct wpabuf *buf;
        u8 op_class, channel;
        enum p2p_role_indication role = P2P_DEVICE_NOT_IN_GROUP;

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

        op_class = p2p->cfg->reg_class;
        channel = p2p->cfg->channel;

        p2p_buf_add_capability(buf, p2p->dev_capab &
                               ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 0);
        p2p_buf_add_device_info(buf, p2p, NULL);

        if (p2p->num_groups > 0) {
                int freq = p2p_group_get_freq(p2p->groups[0]);
                role = P2P_GO_IN_A_GROUP;
                if (p2p_freq_to_channel(freq, &op_class, &channel) < 0) {
                        p2p_dbg(p2p,
                                "Unknown GO operating frequency %d MHz for NFC handover",
                                freq);
                        wpabuf_free(buf);
                        return NULL;
                }
        } else if (client_freq > 0) {
                role = P2P_CLIENT_IN_A_GROUP;
                if (p2p_freq_to_channel(client_freq, &op_class, &channel) < 0) {
                        p2p_dbg(p2p,
                                "Unknown client operating frequency %d MHz for NFC handover",
                                client_freq);
                        wpabuf_free(buf);
                        return NULL;
                }
        }

        p2p_buf_add_oob_go_neg_channel(buf, p2p->cfg->country, op_class,
                                       channel, role);

        if (p2p->num_groups > 0) {
                /* Limit number of clients to avoid very long message */
                p2p_buf_add_group_info(p2p->groups[0], buf, 5);
                p2p_group_buf_add_id(p2p->groups[0], buf);
        } else if (client_freq > 0 &&
                   go_dev_addr && !is_zero_ether_addr(go_dev_addr) &&
                   ssid && ssid_len > 0) {
                /*
                 * Add the optional P2P Group ID to indicate in which group this
                 * device is a P2P Client.
                 */
                p2p_buf_add_group_id(buf, go_dev_addr, ssid, ssid_len);
        }

        return buf;
}


struct wpabuf * p2p_build_nfc_handover_req(struct p2p_data *p2p,
                                           int client_freq,
                                           const u8 *go_dev_addr,
                                           const u8 *ssid, size_t ssid_len)
{
        return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
                                      ssid_len);
}


struct wpabuf * p2p_build_nfc_handover_sel(struct p2p_data *p2p,
                                           int client_freq,
                                           const u8 *go_dev_addr,
                                           const u8 *ssid, size_t ssid_len)
{
        return p2p_build_nfc_handover(p2p, client_freq, go_dev_addr, ssid,
                                      ssid_len);
}


int p2p_process_nfc_connection_handover(struct p2p_data *p2p,
                                        struct p2p_nfc_params *params)
{
        struct p2p_message msg;
        struct p2p_device *dev;
        const u8 *p2p_dev_addr;
        int freq;
        enum p2p_role_indication role;

        params->next_step = NO_ACTION;

        if (p2p_parse_ies_separate(params->wsc_attr, params->wsc_len,
                                   params->p2p_attr, params->p2p_len, &msg)) {
                p2p_dbg(p2p, "Failed to parse WSC/P2P attributes from NFC");
                p2p_parse_free(&msg);
                return -1;
        }

        if (msg.p2p_device_addr)
                p2p_dev_addr = msg.p2p_device_addr;
        else if (msg.device_id)
                p2p_dev_addr = msg.device_id;
        else {
                p2p_dbg(p2p, "Ignore scan data without P2P Device Info or P2P Device Id");
                p2p_parse_free(&msg);
                return -1;
        }

        if (msg.oob_dev_password) {
                os_memcpy(params->oob_dev_pw, msg.oob_dev_password,
                          msg.oob_dev_password_len);
                params->oob_dev_pw_len = msg.oob_dev_password_len;
        }

        dev = p2p_create_device(p2p, p2p_dev_addr);
        if (dev == NULL) {
                p2p_parse_free(&msg);
                return -1;
        }

        params->peer = &dev->info;

        os_get_reltime(&dev->last_seen);
        dev->flags &= ~(P2P_DEV_PROBE_REQ_ONLY | P2P_DEV_GROUP_CLIENT_ONLY);
        p2p_copy_wps_info(p2p, dev, 0, &msg);

        if (!msg.oob_go_neg_channel) {
                p2p_dbg(p2p, "OOB GO Negotiation Channel attribute not included");
                return -1;
        }

        if (msg.oob_go_neg_channel[3] == 0 &&
            msg.oob_go_neg_channel[4] == 0)
                freq = 0;
        else
                freq = p2p_channel_to_freq(msg.oob_go_neg_channel[3],
                                           msg.oob_go_neg_channel[4]);
        if (freq < 0) {
                p2p_dbg(p2p, "Unknown peer OOB GO Neg channel");
                return -1;
        }
        role = msg.oob_go_neg_channel[5];

        if (role == P2P_GO_IN_A_GROUP) {
                p2p_dbg(p2p, "Peer OOB GO operating channel: %u MHz", freq);
                params->go_freq = freq;
        } else if (role == P2P_CLIENT_IN_A_GROUP) {
                p2p_dbg(p2p, "Peer (client) OOB GO operating channel: %u MHz",
                        freq);
                params->go_freq = freq;
        } else
                p2p_dbg(p2p, "Peer OOB GO Neg channel: %u MHz", freq);
        dev->oob_go_neg_freq = freq;

        if (!params->sel && role != P2P_GO_IN_A_GROUP) {
                freq = p2p_channel_to_freq(p2p->cfg->reg_class,
                                           p2p->cfg->channel);
                if (freq < 0) {
                        p2p_dbg(p2p, "Own listen channel not known");
                        return -1;
                }
                p2p_dbg(p2p, "Use own Listen channel as OOB GO Neg channel: %u MHz", freq);
                dev->oob_go_neg_freq = freq;
        }

        if (msg.group_id) {
                os_memcpy(params->go_dev_addr, msg.group_id, ETH_ALEN);
                params->go_ssid_len = msg.group_id_len - ETH_ALEN;
                os_memcpy(params->go_ssid, msg.group_id + ETH_ALEN,
                          params->go_ssid_len);
        }

        if (dev->flags & P2P_DEV_USER_REJECTED) {
                p2p_dbg(p2p, "Do not report rejected device");
                p2p_parse_free(&msg);
                return 0;
        }

        if (!(dev->flags & P2P_DEV_REPORTED)) {
                p2p->cfg->dev_found(p2p->cfg->cb_ctx, p2p_dev_addr, &dev->info,
                                    !(dev->flags & P2P_DEV_REPORTED_ONCE));
                dev->flags |= P2P_DEV_REPORTED | P2P_DEV_REPORTED_ONCE;
        }
        p2p_parse_free(&msg);

        if (role == P2P_GO_IN_A_GROUP && p2p->num_groups > 0)
                params->next_step = BOTH_GO;
        else if (role == P2P_GO_IN_A_GROUP)
                params->next_step = JOIN_GROUP;
        else if (role == P2P_CLIENT_IN_A_GROUP) {
                dev->flags |= P2P_DEV_GROUP_CLIENT_ONLY;
                params->next_step = PEER_CLIENT;
        } else if (p2p->num_groups > 0)
                params->next_step = AUTH_JOIN;
        else if (params->sel)
                params->next_step = INIT_GO_NEG;
        else
                params->next_step = RESP_GO_NEG;

        return 0;
}


void p2p_set_authorized_oob_dev_pw_id(struct p2p_data *p2p, u16 dev_pw_id,
                                      int go_intent,
                                      const u8 *own_interface_addr)
{

        p2p->authorized_oob_dev_pw_id = dev_pw_id;
        if (dev_pw_id == 0) {
                p2p_dbg(p2p, "NFC OOB Password unauthorized for static handover");
                return;
        }

        p2p_dbg(p2p, "NFC OOB Password (id=%u) authorized for static handover",
                dev_pw_id);

        p2p->go_intent = go_intent;
        os_memcpy(p2p->intended_addr, own_interface_addr, ETH_ALEN);
}

#endif /* CONFIG_WPS_NFC */


int p2p_set_passphrase_len(struct p2p_data *p2p, unsigned int len)
{
        if (len < 8 || len > 63)
                return -1;
        p2p->cfg->passphrase_len = len;
        return 0;
}


void p2p_set_vendor_elems(struct p2p_data *p2p, struct wpabuf **vendor_elem)
{
        p2p->vendor_elem = vendor_elem;
}


void p2p_go_neg_wait_timeout(void *eloop_ctx, void *timeout_ctx)
{
        struct p2p_data *p2p = eloop_ctx;

        p2p_dbg(p2p,
                "Timeout on waiting peer to become ready for GO Negotiation");
        p2p_go_neg_failed(p2p, -1);
}