/* * 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 "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, struct p2p_device *peer, int status) { struct p2p_go_neg_results res; p2p_clear_timeout(p2p); p2p_set_state(p2p, P2P_IDLE); if (p2p->go_neg_peer) { p2p->go_neg_peer->flags &= ~P2P_DEV_PEER_WAITING_RESPONSE; p2p->go_neg_peer->wps_method = WPS_NOT_READY; p2p->go_neg_peer->oob_pw_id = 0; } p2p->go_neg_peer = NULL; os_memset(&res, 0, sizeof(res)); res.status = status; if (peer) { wpabuf_free(peer->go_neg_conf); peer->go_neg_conf = NULL; 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; } /** * 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); } } /** * 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 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; } 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) 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, dev, -1); p2p->go_neg_peer = NULL; } 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 failed"); 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 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); } 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; } 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) { 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; 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_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); } else if (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 { 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_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(&p2p->channels, &p2p->cfg->cli_channels, &p2p->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, ¶ms->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; int freqs; size_t i, j; 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); } freqs = 0; for (i = 0; i < intersection.reg_classes; i++) { struct p2p_reg_class *c = &intersection.reg_class[i]; if (freqs + 1 == P2P_MAX_CHANNELS) break; for (j = 0; j < c->channels; j++) { int freq; if (freqs + 1 == P2P_MAX_CHANNELS) break; freq = p2p_channel_to_freq(c->reg_class, c->channel[j]); if (freq < 0) continue; res.freq_list[freqs++] = freq; } } 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->cfg->send_action_done(p2p->cfg->cb_ctx); 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; } 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); 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) 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; } void p2p_continue_find(struct p2p_data *p2p) { struct p2p_device *dev; p2p_set_state(p2p, P2P_SEARCH); dl_list_for_each(dev, &p2p->devices, struct p2p_device, list) { 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; 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; } } 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) { 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->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 *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); p2p_buf_add_capability(ies, p2p->dev_capab & ~P2P_DEV_CAPAB_CLIENT_DISCOVERABILITY, 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); /* 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, 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, p2p->go_neg_peer, -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->pending_action_state, freq, MAC2STR(dst), MAC2STR(src), MAC2STR(bssid), result); 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, p2p->go_neg_peer, -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, p2p->go_neg_peer, -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, p2p->go_neg_peer, -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; struct os_reltime now; if (dev == NULL) { p2p_dbg(p2p, "Unknown GO Neg peer - stop GO Neg wait"); return; } os_get_reltime(&now); if (os_reltime_expired(&now, &dev->go_neg_wait_started, 120)) { p2p_dbg(p2p, "Timeout on waiting peer to become ready for GO Negotiation"); p2p_go_neg_failed(p2p, dev, -1); 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; 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 (res < 0 || res >= end - pos) 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 (res < 0 || res >= end - pos) 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 (res < 0 || res >= end - pos) return pos - buf; pos += res; } #ifdef CONFIG_WIFI_DISPLAY if (dev->info.wfd_subelems) { res = os_snprintf(pos, end - pos, "wfd_subelems="); if (res < 0 || res >= end - pos) 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 (res < 0 || res >= end - pos) 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; }