/* * wpa_supplicant - P2P * Copyright (c) 2009-2010, Atheros Communications * Copyright (c) 2010-2014, Jouni Malinen * * 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_common.h" #include "common/ieee802_11_defs.h" #include "common/wpa_ctrl.h" #include "wps/wps_i.h" #include "p2p/p2p.h" #include "ap/hostapd.h" #include "ap/ap_config.h" #include "ap/sta_info.h" #include "ap/ap_drv_ops.h" #include "ap/wps_hostapd.h" #include "ap/p2p_hostapd.h" #include "eapol_supp/eapol_supp_sm.h" #include "rsn_supp/wpa.h" #include "wpa_supplicant_i.h" #include "driver_i.h" #include "ap.h" #include "config_ssid.h" #include "config.h" #include "notify.h" #include "scan.h" #include "bss.h" #include "offchannel.h" #include "wps_supplicant.h" #include "p2p_supplicant.h" #include "wifi_display.h" /* * How many times to try to scan to find the GO before giving up on join * request. */ #define P2P_MAX_JOIN_SCAN_ATTEMPTS 10 #define P2P_AUTO_PD_SCAN_ATTEMPTS 5 #ifndef P2P_MAX_CLIENT_IDLE /* * How many seconds to try to reconnect to the GO when connection in P2P client * role has been lost. */ #define P2P_MAX_CLIENT_IDLE 10 #endif /* P2P_MAX_CLIENT_IDLE */ #ifndef P2P_MAX_INITIAL_CONN_WAIT /* * How many seconds to wait for initial 4-way handshake to get completed after * WPS provisioning step. */ #define P2P_MAX_INITIAL_CONN_WAIT 10 #endif /* P2P_MAX_INITIAL_CONN_WAIT */ #ifndef P2P_MAX_INITIAL_CONN_WAIT_GO /* * How many seconds to wait for initial 4-way handshake to get completed after * WPS provisioning step on the GO. This controls the extra time the P2P * operation is considered to be in progress (e.g., to delay other scans) after * WPS provisioning has been completed on the GO during group formation. */ #define P2P_MAX_INITIAL_CONN_WAIT_GO 10 #endif /* P2P_MAX_INITIAL_CONN_WAIT_GO */ #ifndef P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE /* * How many seconds to wait for initial 4-way handshake to get completed after * re-invocation of a persistent group on the GO when the client is expected * to connect automatically (no user interaction). */ #define P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE 15 #endif /* P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE */ #ifndef P2P_CONCURRENT_SEARCH_DELAY #define P2P_CONCURRENT_SEARCH_DELAY 500 #endif /* P2P_CONCURRENT_SEARCH_DELAY */ #define P2P_MGMT_DEVICE_PREFIX "p2p-dev-" enum p2p_group_removal_reason { P2P_GROUP_REMOVAL_UNKNOWN, P2P_GROUP_REMOVAL_SILENT, P2P_GROUP_REMOVAL_FORMATION_FAILED, P2P_GROUP_REMOVAL_REQUESTED, P2P_GROUP_REMOVAL_IDLE_TIMEOUT, P2P_GROUP_REMOVAL_UNAVAILABLE, P2P_GROUP_REMOVAL_GO_ENDING_SESSION, P2P_GROUP_REMOVAL_PSK_FAILURE, P2P_GROUP_REMOVAL_FREQ_CONFLICT }; static void wpas_p2p_long_listen_timeout(void *eloop_ctx, void *timeout_ctx); static struct wpa_supplicant * wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated, int go); static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s, int freq, const u8 *ssid, size_t ssid_len); static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq, const u8 *ssid, size_t ssid_len); static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx); static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr, const u8 *dev_addr, enum p2p_wps_method wps_method, int auto_join, int freq, const u8 *ssid, size_t ssid_len); static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s); static void wpas_p2p_cross_connect_setup(struct wpa_supplicant *wpa_s); static void wpas_p2p_group_idle_timeout(void *eloop_ctx, void *timeout_ctx); static void wpas_p2p_set_group_idle_timeout(struct wpa_supplicant *wpa_s); static void wpas_p2p_group_formation_timeout(void *eloop_ctx, void *timeout_ctx); static void wpas_p2p_group_freq_conflict(void *eloop_ctx, void *timeout_ctx); static void wpas_p2p_fallback_to_go_neg(struct wpa_supplicant *wpa_s, int group_added); static int wpas_p2p_stop_find_oper(struct wpa_supplicant *wpa_s); /* * Get the number of concurrent channels that the HW can operate, but that are * currently not in use by any of the wpa_supplicant interfaces. */ static int wpas_p2p_num_unused_channels(struct wpa_supplicant *wpa_s) { int *freqs; int num, unused; freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int)); if (!freqs) return -1; num = get_shared_radio_freqs(wpa_s, freqs, wpa_s->num_multichan_concurrent); os_free(freqs); unused = wpa_s->num_multichan_concurrent - num; wpa_dbg(wpa_s, MSG_DEBUG, "P2P: num_unused_channels: %d", unused); return unused; } /* * Get the frequencies that are currently in use by one or more of the virtual * interfaces, and that are also valid for P2P operation. */ static int wpas_p2p_valid_oper_freqs(struct wpa_supplicant *wpa_s, int *p2p_freqs, unsigned int len) { int *freqs; unsigned int num, i, j; freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int)); if (!freqs) return -1; num = get_shared_radio_freqs(wpa_s, freqs, wpa_s->num_multichan_concurrent); os_memset(p2p_freqs, 0, sizeof(int) * len); for (i = 0, j = 0; i < num && j < len; i++) { if (p2p_supported_freq(wpa_s->global->p2p, freqs[i])) p2p_freqs[j++] = freqs[i]; } os_free(freqs); dump_freq_array(wpa_s, "valid for P2P", p2p_freqs, j); return j; } static void wpas_p2p_set_own_freq_preference(struct wpa_supplicant *wpa_s, int freq) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return; if (wpa_s->parent->conf->p2p_ignore_shared_freq && freq > 0 && wpa_s->num_multichan_concurrent > 1 && wpas_p2p_num_unused_channels(wpa_s) > 0) { wpa_printf(MSG_DEBUG, "P2P: Ignore own channel preference %d MHz due to p2p_ignore_shared_freq=1 configuration", freq); freq = 0; } p2p_set_own_freq_preference(wpa_s->global->p2p, freq); } static void wpas_p2p_scan_res_handler(struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res) { size_t i; if (wpa_s->p2p_scan_work) { struct wpa_radio_work *work = wpa_s->p2p_scan_work; wpa_s->p2p_scan_work = NULL; radio_work_done(work); } if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return; wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS)", (int) scan_res->num); for (i = 0; i < scan_res->num; i++) { struct wpa_scan_res *bss = scan_res->res[i]; struct os_reltime time_tmp_age, entry_ts; const u8 *ies; size_t ies_len; time_tmp_age.sec = bss->age / 1000; time_tmp_age.usec = (bss->age % 1000) * 1000; os_reltime_sub(&scan_res->fetch_time, &time_tmp_age, &entry_ts); ies = (const u8 *) (bss + 1); ies_len = bss->ie_len; if (bss->beacon_ie_len > 0 && !wpa_scan_get_vendor_ie(bss, P2P_IE_VENDOR_TYPE) && wpa_scan_get_vendor_ie_beacon(bss, P2P_IE_VENDOR_TYPE)) { wpa_printf(MSG_DEBUG, "P2P: Use P2P IE(s) from Beacon frame since no P2P IE(s) in Probe Response frames received for " MACSTR, MAC2STR(bss->bssid)); ies = ies + ies_len; ies_len = bss->beacon_ie_len; } if (p2p_scan_res_handler(wpa_s->global->p2p, bss->bssid, bss->freq, &entry_ts, bss->level, ies, ies_len) > 0) break; } p2p_scan_res_handled(wpa_s->global->p2p); } static void wpas_p2p_trigger_scan_cb(struct wpa_radio_work *work, int deinit) { struct wpa_supplicant *wpa_s = work->wpa_s; struct wpa_driver_scan_params *params = work->ctx; int ret; if (deinit) { wpa_scan_free_params(params); return; } ret = wpa_drv_scan(wpa_s, params); wpa_scan_free_params(params); work->ctx = NULL; if (ret) { radio_work_done(work); return; } os_get_reltime(&wpa_s->scan_trigger_time); wpa_s->scan_res_handler = wpas_p2p_scan_res_handler; wpa_s->own_scan_requested = 1; wpa_s->p2p_scan_work = work; } static int wpas_p2p_scan(void *ctx, enum p2p_scan_type type, int freq, unsigned int num_req_dev_types, const u8 *req_dev_types, const u8 *dev_id, u16 pw_id) { struct wpa_supplicant *wpa_s = ctx; struct wpa_driver_scan_params *params = NULL; struct wpabuf *wps_ie, *ies; size_t ielen; u8 *n; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; if (wpa_s->p2p_scan_work) { wpa_dbg(wpa_s, MSG_INFO, "P2P: Reject scan trigger since one is already pending"); return -1; } params = os_zalloc(sizeof(*params)); if (params == NULL) return -1; /* P2P Wildcard SSID */ params->num_ssids = 1; n = os_malloc(P2P_WILDCARD_SSID_LEN); if (n == NULL) goto fail; os_memcpy(n, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN); params->ssids[0].ssid = n; params->ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN; wpa_s->wps->dev.p2p = 1; wps_ie = wps_build_probe_req_ie(pw_id, &wpa_s->wps->dev, wpa_s->wps->uuid, WPS_REQ_ENROLLEE, num_req_dev_types, req_dev_types); if (wps_ie == NULL) goto fail; ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); ies = wpabuf_alloc(wpabuf_len(wps_ie) + ielen); if (ies == NULL) { wpabuf_free(wps_ie); goto fail; } wpabuf_put_buf(ies, wps_ie); wpabuf_free(wps_ie); p2p_scan_ie(wpa_s->global->p2p, ies, dev_id); params->p2p_probe = 1; n = os_malloc(wpabuf_len(ies)); if (n == NULL) { wpabuf_free(ies); goto fail; } os_memcpy(n, wpabuf_head(ies), wpabuf_len(ies)); params->extra_ies = n; params->extra_ies_len = wpabuf_len(ies); wpabuf_free(ies); switch (type) { case P2P_SCAN_SOCIAL: params->freqs = os_malloc(4 * sizeof(int)); if (params->freqs == NULL) goto fail; params->freqs[0] = 2412; params->freqs[1] = 2437; params->freqs[2] = 2462; params->freqs[3] = 0; break; case P2P_SCAN_FULL: break; case P2P_SCAN_SOCIAL_PLUS_ONE: params->freqs = os_malloc(5 * sizeof(int)); if (params->freqs == NULL) goto fail; params->freqs[0] = 2412; params->freqs[1] = 2437; params->freqs[2] = 2462; params->freqs[3] = freq; params->freqs[4] = 0; break; } radio_remove_unstarted_work(wpa_s, "p2p-scan"); if (radio_add_work(wpa_s, 0, "p2p-scan", 0, wpas_p2p_trigger_scan_cb, params) < 0) goto fail; return 0; fail: wpa_scan_free_params(params); return -1; } static enum wpa_driver_if_type wpas_p2p_if_type(int p2p_group_interface) { switch (p2p_group_interface) { case P2P_GROUP_INTERFACE_PENDING: return WPA_IF_P2P_GROUP; case P2P_GROUP_INTERFACE_GO: return WPA_IF_P2P_GO; case P2P_GROUP_INTERFACE_CLIENT: return WPA_IF_P2P_CLIENT; } return WPA_IF_P2P_GROUP; } static struct wpa_supplicant * wpas_get_p2p_group(struct wpa_supplicant *wpa_s, const u8 *ssid, size_t ssid_len, int *go) { struct wpa_ssid *s; for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) { for (s = wpa_s->conf->ssid; s; s = s->next) { if (s->disabled != 0 || !s->p2p_group || s->ssid_len != ssid_len || os_memcmp(ssid, s->ssid, ssid_len) != 0) continue; if (s->mode == WPAS_MODE_P2P_GO && s != wpa_s->current_ssid) continue; if (go) *go = s->mode == WPAS_MODE_P2P_GO; return wpa_s; } } return NULL; } static int wpas_p2p_group_delete(struct wpa_supplicant *wpa_s, enum p2p_group_removal_reason removal_reason) { struct wpa_ssid *ssid; char *gtype; const char *reason; ssid = wpa_s->current_ssid; if (ssid == NULL) { /* * The current SSID was not known, but there may still be a * pending P2P group interface waiting for provisioning or a * P2P group that is trying to reconnect. */ ssid = wpa_s->conf->ssid; while (ssid) { if (ssid->p2p_group && ssid->disabled != 2) break; ssid = ssid->next; } if (ssid == NULL && wpa_s->p2p_group_interface == NOT_P2P_GROUP_INTERFACE) { wpa_printf(MSG_ERROR, "P2P: P2P group interface " "not found"); return -1; } } if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_GO) gtype = "GO"; else if (wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT || (ssid && ssid->mode == WPAS_MODE_INFRA)) { wpa_s->reassociate = 0; wpa_s->disconnected = 1; wpa_supplicant_deauthenticate(wpa_s, WLAN_REASON_DEAUTH_LEAVING); gtype = "client"; } else gtype = "GO"; if (wpa_s->cross_connect_in_use) { wpa_s->cross_connect_in_use = 0; wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s", wpa_s->ifname, wpa_s->cross_connect_uplink); } switch (removal_reason) { case P2P_GROUP_REMOVAL_REQUESTED: reason = " reason=REQUESTED"; break; case P2P_GROUP_REMOVAL_FORMATION_FAILED: reason = " reason=FORMATION_FAILED"; break; case P2P_GROUP_REMOVAL_IDLE_TIMEOUT: reason = " reason=IDLE"; break; case P2P_GROUP_REMOVAL_UNAVAILABLE: reason = " reason=UNAVAILABLE"; break; case P2P_GROUP_REMOVAL_GO_ENDING_SESSION: reason = " reason=GO_ENDING_SESSION"; break; case P2P_GROUP_REMOVAL_PSK_FAILURE: reason = " reason=PSK_FAILURE"; break; case P2P_GROUP_REMOVAL_FREQ_CONFLICT: reason = " reason=FREQ_CONFLICT"; break; default: reason = ""; break; } if (removal_reason != P2P_GROUP_REMOVAL_SILENT) { wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_REMOVED "%s %s%s", wpa_s->ifname, gtype, reason); } if (eloop_cancel_timeout(wpas_p2p_group_freq_conflict, wpa_s, NULL) > 0) wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group freq_conflict timeout"); if (eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0) wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout"); if (eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL) > 0) { wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group formation " "timeout"); wpa_s->p2p_in_provisioning = 0; } /* * Make sure wait for the first client does not remain active after the * group has been removed. */ wpa_s->global->p2p_go_wait_client.sec = 0; if (removal_reason != P2P_GROUP_REMOVAL_SILENT && ssid) wpas_notify_p2p_group_removed(wpa_s, ssid, gtype); if (wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE) { struct wpa_global *global; char *ifname; enum wpa_driver_if_type type; wpa_printf(MSG_DEBUG, "P2P: Remove group interface %s", wpa_s->ifname); global = wpa_s->global; ifname = os_strdup(wpa_s->ifname); type = wpas_p2p_if_type(wpa_s->p2p_group_interface); wpa_supplicant_remove_iface(wpa_s->global, wpa_s, 0); wpa_s = global->ifaces; if (wpa_s && ifname) wpa_drv_if_remove(wpa_s, type, ifname); os_free(ifname); return 1; } if (!wpa_s->p2p_go_group_formation_completed) { wpa_s->global->p2p_group_formation = NULL; wpa_s->p2p_in_provisioning = 0; } wpa_s->show_group_started = 0; os_free(wpa_s->go_params); wpa_s->go_params = NULL; wpa_s->waiting_presence_resp = 0; wpa_printf(MSG_DEBUG, "P2P: Remove temporary group network"); if (ssid && (ssid->p2p_group || ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION || (ssid->key_mgmt & WPA_KEY_MGMT_WPS))) { int id = ssid->id; if (ssid == wpa_s->current_ssid) { wpa_sm_set_config(wpa_s->wpa, NULL); eapol_sm_notify_config(wpa_s->eapol, NULL, NULL); wpa_s->current_ssid = NULL; } /* * Networks objects created during any P2P activities are not * exposed out as they might/will confuse certain non-P2P aware * applications since these network objects won't behave like * regular ones. * * Likewise, we don't send out network removed signals for such * network objects. */ wpa_config_remove_network(wpa_s->conf, id); wpa_supplicant_clear_status(wpa_s); wpa_supplicant_cancel_sched_scan(wpa_s); } else { wpa_printf(MSG_DEBUG, "P2P: Temporary group network not " "found"); } if (wpa_s->ap_iface) wpa_supplicant_ap_deinit(wpa_s); else wpa_drv_deinit_p2p_cli(wpa_s); return 0; } static int wpas_p2p_persistent_group(struct wpa_supplicant *wpa_s, u8 *go_dev_addr, const u8 *ssid, size_t ssid_len) { struct wpa_bss *bss; const u8 *bssid; struct wpabuf *p2p; u8 group_capab; const u8 *addr; if (wpa_s->go_params) bssid = wpa_s->go_params->peer_interface_addr; else bssid = wpa_s->bssid; bss = wpa_bss_get(wpa_s, bssid, ssid, ssid_len); if (bss == NULL && wpa_s->go_params && !is_zero_ether_addr(wpa_s->go_params->peer_device_addr)) bss = wpa_bss_get_p2p_dev_addr( wpa_s, wpa_s->go_params->peer_device_addr); if (bss == NULL) { u8 iface_addr[ETH_ALEN]; if (p2p_get_interface_addr(wpa_s->global->p2p, bssid, iface_addr) == 0) bss = wpa_bss_get(wpa_s, iface_addr, ssid, ssid_len); } if (bss == NULL) { wpa_printf(MSG_DEBUG, "P2P: Could not figure out whether " "group is persistent - BSS " MACSTR " not found", MAC2STR(bssid)); return 0; } p2p = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE); if (p2p == NULL) p2p = wpa_bss_get_vendor_ie_multi_beacon(bss, P2P_IE_VENDOR_TYPE); if (p2p == NULL) { wpa_printf(MSG_DEBUG, "P2P: Could not figure out whether " "group is persistent - BSS " MACSTR " did not include P2P IE", MAC2STR(bssid)); wpa_hexdump(MSG_DEBUG, "P2P: Probe Response IEs", (u8 *) (bss + 1), bss->ie_len); wpa_hexdump(MSG_DEBUG, "P2P: Beacon IEs", ((u8 *) bss + 1) + bss->ie_len, bss->beacon_ie_len); return 0; } group_capab = p2p_get_group_capab(p2p); addr = p2p_get_go_dev_addr(p2p); wpa_printf(MSG_DEBUG, "P2P: Checking whether group is persistent: " "group_capab=0x%x", group_capab); if (addr) { os_memcpy(go_dev_addr, addr, ETH_ALEN); wpa_printf(MSG_DEBUG, "P2P: GO Device Address " MACSTR, MAC2STR(addr)); } else os_memset(go_dev_addr, 0, ETH_ALEN); wpabuf_free(p2p); wpa_printf(MSG_DEBUG, "P2P: BSS " MACSTR " group_capab=0x%x " "go_dev_addr=" MACSTR, MAC2STR(bssid), group_capab, MAC2STR(go_dev_addr)); return group_capab & P2P_GROUP_CAPAB_PERSISTENT_GROUP; } static int wpas_p2p_store_persistent_group(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, const u8 *go_dev_addr) { struct wpa_ssid *s; int changed = 0; wpa_printf(MSG_DEBUG, "P2P: Storing credentials for a persistent " "group (GO Dev Addr " MACSTR ")", MAC2STR(go_dev_addr)); for (s = wpa_s->conf->ssid; s; s = s->next) { if (s->disabled == 2 && os_memcmp(go_dev_addr, s->bssid, ETH_ALEN) == 0 && s->ssid_len == ssid->ssid_len && os_memcmp(ssid->ssid, s->ssid, ssid->ssid_len) == 0) break; } if (s) { wpa_printf(MSG_DEBUG, "P2P: Update existing persistent group " "entry"); if (ssid->passphrase && !s->passphrase) changed = 1; else if (ssid->passphrase && s->passphrase && os_strcmp(ssid->passphrase, s->passphrase) != 0) changed = 1; } else { wpa_printf(MSG_DEBUG, "P2P: Create a new persistent group " "entry"); changed = 1; s = wpa_config_add_network(wpa_s->conf); if (s == NULL) return -1; /* * Instead of network_added we emit persistent_group_added * notification. Also to keep the defense checks in * persistent_group obj registration method, we set the * relevant flags in s to designate it as a persistent group. */ s->p2p_group = 1; s->p2p_persistent_group = 1; wpas_notify_persistent_group_added(wpa_s, s); wpa_config_set_network_defaults(s); } s->p2p_group = 1; s->p2p_persistent_group = 1; s->disabled = 2; s->bssid_set = 1; os_memcpy(s->bssid, go_dev_addr, ETH_ALEN); s->mode = ssid->mode; s->auth_alg = WPA_AUTH_ALG_OPEN; s->key_mgmt = WPA_KEY_MGMT_PSK; s->proto = WPA_PROTO_RSN; s->pairwise_cipher = WPA_CIPHER_CCMP; s->export_keys = 1; if (ssid->passphrase) { os_free(s->passphrase); s->passphrase = os_strdup(ssid->passphrase); } if (ssid->psk_set) { s->psk_set = 1; os_memcpy(s->psk, ssid->psk, 32); } if (s->passphrase && !s->psk_set) wpa_config_update_psk(s); if (s->ssid == NULL || s->ssid_len < ssid->ssid_len) { os_free(s->ssid); s->ssid = os_malloc(ssid->ssid_len); } if (s->ssid) { s->ssid_len = ssid->ssid_len; os_memcpy(s->ssid, ssid->ssid, s->ssid_len); } if (ssid->mode == WPAS_MODE_P2P_GO && wpa_s->global->add_psk) { dl_list_add(&s->psk_list, &wpa_s->global->add_psk->list); wpa_s->global->add_psk = NULL; changed = 1; } #ifndef CONFIG_NO_CONFIG_WRITE if (changed && wpa_s->conf->update_config && wpa_config_write(wpa_s->confname, wpa_s->conf)) { wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration"); } #endif /* CONFIG_NO_CONFIG_WRITE */ return s->id; } static void wpas_p2p_add_persistent_group_client(struct wpa_supplicant *wpa_s, const u8 *addr) { struct wpa_ssid *ssid, *s; u8 *n; size_t i; int found = 0; ssid = wpa_s->current_ssid; if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GO || !ssid->p2p_persistent_group) return; for (s = wpa_s->parent->conf->ssid; s; s = s->next) { if (s->disabled != 2 || s->mode != WPAS_MODE_P2P_GO) continue; if (s->ssid_len == ssid->ssid_len && os_memcmp(s->ssid, ssid->ssid, s->ssid_len) == 0) break; } if (s == NULL) return; for (i = 0; s->p2p_client_list && i < s->num_p2p_clients; i++) { if (os_memcmp(s->p2p_client_list + i * ETH_ALEN, addr, ETH_ALEN) != 0) continue; if (i == s->num_p2p_clients - 1) return; /* already the most recent entry */ /* move the entry to mark it most recent */ os_memmove(s->p2p_client_list + i * ETH_ALEN, s->p2p_client_list + (i + 1) * ETH_ALEN, (s->num_p2p_clients - i - 1) * ETH_ALEN); os_memcpy(s->p2p_client_list + (s->num_p2p_clients - 1) * ETH_ALEN, addr, ETH_ALEN); found = 1; break; } if (!found && s->num_p2p_clients < P2P_MAX_STORED_CLIENTS) { n = os_realloc_array(s->p2p_client_list, s->num_p2p_clients + 1, ETH_ALEN); if (n == NULL) return; os_memcpy(n + s->num_p2p_clients * ETH_ALEN, addr, ETH_ALEN); s->p2p_client_list = n; s->num_p2p_clients++; } else if (!found) { /* Not enough room for an additional entry - drop the oldest * entry */ os_memmove(s->p2p_client_list, s->p2p_client_list + ETH_ALEN, (s->num_p2p_clients - 1) * ETH_ALEN); os_memcpy(s->p2p_client_list + (s->num_p2p_clients - 1) * ETH_ALEN, addr, ETH_ALEN); } #ifndef CONFIG_NO_CONFIG_WRITE if (wpa_s->parent->conf->update_config && wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf)) wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration"); #endif /* CONFIG_NO_CONFIG_WRITE */ } static void wpas_group_formation_completed(struct wpa_supplicant *wpa_s, int success) { struct wpa_ssid *ssid; const char *ssid_txt; int client; int persistent; u8 go_dev_addr[ETH_ALEN]; int network_id = -1; /* * This callback is likely called for the main interface. Update wpa_s * to use the group interface if a new interface was created for the * group. */ if (wpa_s->global->p2p_group_formation) wpa_s = wpa_s->global->p2p_group_formation; if (wpa_s->p2p_go_group_formation_completed) { wpa_s->global->p2p_group_formation = NULL; wpa_s->p2p_in_provisioning = 0; } if (!success) { wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_FORMATION_FAILURE); wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_FORMATION_FAILED); return; } wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_FORMATION_SUCCESS); ssid = wpa_s->current_ssid; if (ssid && ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) { ssid->mode = WPAS_MODE_P2P_GO; p2p_group_notif_formation_done(wpa_s->p2p_group); wpa_supplicant_ap_mac_addr_filter(wpa_s, NULL); } persistent = 0; if (ssid) { ssid_txt = wpa_ssid_txt(ssid->ssid, ssid->ssid_len); client = ssid->mode == WPAS_MODE_INFRA; if (ssid->mode == WPAS_MODE_P2P_GO) { persistent = ssid->p2p_persistent_group; os_memcpy(go_dev_addr, wpa_s->global->p2p_dev_addr, ETH_ALEN); } else persistent = wpas_p2p_persistent_group(wpa_s, go_dev_addr, ssid->ssid, ssid->ssid_len); } else { ssid_txt = ""; client = wpa_s->p2p_group_interface == P2P_GROUP_INTERFACE_CLIENT; os_memset(go_dev_addr, 0, ETH_ALEN); } wpa_s->show_group_started = 0; if (client) { /* * Indicate event only after successfully completed 4-way * handshake, i.e., when the interface is ready for data * packets. */ wpa_s->show_group_started = 1; } else if (ssid && ssid->passphrase == NULL && ssid->psk_set) { char psk[65]; wpa_snprintf_hex(psk, sizeof(psk), ssid->psk, 32); wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED "%s GO ssid=\"%s\" freq=%d psk=%s go_dev_addr=" MACSTR "%s", wpa_s->ifname, ssid_txt, ssid->frequency, psk, MAC2STR(go_dev_addr), persistent ? " [PERSISTENT]" : ""); wpas_p2p_cross_connect_setup(wpa_s); wpas_p2p_set_group_idle_timeout(wpa_s); } else { wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED "%s GO ssid=\"%s\" freq=%d passphrase=\"%s\" " "go_dev_addr=" MACSTR "%s", wpa_s->ifname, ssid_txt, ssid ? ssid->frequency : 0, ssid && ssid->passphrase ? ssid->passphrase : "", MAC2STR(go_dev_addr), persistent ? " [PERSISTENT]" : ""); wpas_p2p_cross_connect_setup(wpa_s); wpas_p2p_set_group_idle_timeout(wpa_s); } if (persistent) network_id = wpas_p2p_store_persistent_group(wpa_s->parent, ssid, go_dev_addr); else { os_free(wpa_s->global->add_psk); wpa_s->global->add_psk = NULL; } if (network_id < 0 && ssid) network_id = ssid->id; if (!client) { wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 0); os_get_reltime(&wpa_s->global->p2p_go_wait_client); } } struct send_action_work { unsigned int freq; u8 dst[ETH_ALEN]; u8 src[ETH_ALEN]; u8 bssid[ETH_ALEN]; size_t len; unsigned int wait_time; u8 buf[0]; }; static void wpas_p2p_send_action_work_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (!wpa_s->p2p_send_action_work) return; wpa_printf(MSG_DEBUG, "P2P: Send Action frame radio work timed out"); os_free(wpa_s->p2p_send_action_work->ctx); radio_work_done(wpa_s->p2p_send_action_work); wpa_s->p2p_send_action_work = NULL; } static void wpas_p2p_send_action_tx_status(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *data, size_t data_len, enum offchannel_send_action_result result) { enum p2p_send_action_result res = P2P_SEND_ACTION_SUCCESS; if (wpa_s->p2p_send_action_work) { struct send_action_work *awork; awork = wpa_s->p2p_send_action_work->ctx; if (awork->wait_time == 0) { os_free(awork); radio_work_done(wpa_s->p2p_send_action_work); wpa_s->p2p_send_action_work = NULL; } else { /* * In theory, this should not be needed, but number of * places in the P2P code is still using non-zero wait * time for the last Action frame in the sequence and * some of these do not call send_action_done(). */ eloop_cancel_timeout(wpas_p2p_send_action_work_timeout, wpa_s, NULL); eloop_register_timeout( 0, awork->wait_time * 1000, wpas_p2p_send_action_work_timeout, wpa_s, NULL); } } if (wpa_s->global->p2p == NULL || wpa_s->global->p2p_disabled) return; switch (result) { case OFFCHANNEL_SEND_ACTION_SUCCESS: res = P2P_SEND_ACTION_SUCCESS; break; case OFFCHANNEL_SEND_ACTION_NO_ACK: res = P2P_SEND_ACTION_NO_ACK; break; case OFFCHANNEL_SEND_ACTION_FAILED: res = P2P_SEND_ACTION_FAILED; break; } p2p_send_action_cb(wpa_s->global->p2p, freq, dst, src, bssid, res); if (result != OFFCHANNEL_SEND_ACTION_SUCCESS && wpa_s->pending_pd_before_join && (os_memcmp(dst, wpa_s->pending_join_dev_addr, ETH_ALEN) == 0 || os_memcmp(dst, wpa_s->pending_join_iface_addr, ETH_ALEN) == 0) && wpa_s->p2p_fallback_to_go_neg) { wpa_s->pending_pd_before_join = 0; wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No ACK for PD Req " "during p2p_connect-auto"); wpas_p2p_fallback_to_go_neg(wpa_s, 0); return; } } static void wpas_send_action_cb(struct wpa_radio_work *work, int deinit) { struct wpa_supplicant *wpa_s = work->wpa_s; struct send_action_work *awork = work->ctx; if (deinit) { os_free(awork); return; } if (offchannel_send_action(wpa_s, awork->freq, awork->dst, awork->src, awork->bssid, awork->buf, awork->len, awork->wait_time, wpas_p2p_send_action_tx_status, 1) < 0) { os_free(awork); radio_work_done(work); return; } wpa_s->p2p_send_action_work = work; } static int wpas_send_action_work(struct wpa_supplicant *wpa_s, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *buf, size_t len, unsigned int wait_time) { struct send_action_work *awork; if (wpa_s->p2p_send_action_work) { wpa_printf(MSG_DEBUG, "P2P: Cannot schedule new p2p-send-action work since one is already pending"); return -1; } awork = os_zalloc(sizeof(*awork) + len); if (awork == NULL) return -1; awork->freq = freq; os_memcpy(awork->dst, dst, ETH_ALEN); os_memcpy(awork->src, src, ETH_ALEN); os_memcpy(awork->bssid, bssid, ETH_ALEN); awork->len = len; awork->wait_time = wait_time; os_memcpy(awork->buf, buf, len); if (radio_add_work(wpa_s, freq, "p2p-send-action", 0, wpas_send_action_cb, awork) < 0) { os_free(awork); return -1; } return 0; } static int wpas_send_action(void *ctx, unsigned int freq, const u8 *dst, const u8 *src, const u8 *bssid, const u8 *buf, size_t len, unsigned int wait_time) { struct wpa_supplicant *wpa_s = ctx; int listen_freq = -1, send_freq = -1; if (wpa_s->p2p_listen_work) listen_freq = wpa_s->p2p_listen_work->freq; if (wpa_s->p2p_send_action_work) send_freq = wpa_s->p2p_send_action_work->freq; if (listen_freq != (int) freq && send_freq != (int) freq) { wpa_printf(MSG_DEBUG, "P2P: Schedule new radio work for Action frame TX (listen_freq=%d send_freq=%d)", listen_freq, send_freq); return wpas_send_action_work(wpa_s, freq, dst, src, bssid, buf, len, wait_time); } wpa_printf(MSG_DEBUG, "P2P: Use ongoing radio work for Action frame TX"); return offchannel_send_action(wpa_s, freq, dst, src, bssid, buf, len, wait_time, wpas_p2p_send_action_tx_status, 1); } static void wpas_send_action_done(void *ctx) { struct wpa_supplicant *wpa_s = ctx; if (wpa_s->p2p_send_action_work) { eloop_cancel_timeout(wpas_p2p_send_action_work_timeout, wpa_s, NULL); os_free(wpa_s->p2p_send_action_work->ctx); radio_work_done(wpa_s->p2p_send_action_work); wpa_s->p2p_send_action_work = NULL; } offchannel_send_action_done(wpa_s); } static int wpas_copy_go_neg_results(struct wpa_supplicant *wpa_s, struct p2p_go_neg_results *params) { if (wpa_s->go_params == NULL) { wpa_s->go_params = os_malloc(sizeof(*params)); if (wpa_s->go_params == NULL) return -1; } os_memcpy(wpa_s->go_params, params, sizeof(*params)); return 0; } static void wpas_start_wps_enrollee(struct wpa_supplicant *wpa_s, struct p2p_go_neg_results *res) { wpa_printf(MSG_DEBUG, "P2P: Start WPS Enrollee for peer " MACSTR " dev_addr " MACSTR " wps_method %d", MAC2STR(res->peer_interface_addr), MAC2STR(res->peer_device_addr), res->wps_method); wpa_hexdump_ascii(MSG_DEBUG, "P2P: Start WPS Enrollee for SSID", res->ssid, res->ssid_len); wpa_supplicant_ap_deinit(wpa_s); wpas_copy_go_neg_results(wpa_s, res); if (res->wps_method == WPS_PBC) { wpas_wps_start_pbc(wpa_s, res->peer_interface_addr, 1); #ifdef CONFIG_WPS_NFC } else if (res->wps_method == WPS_NFC) { wpas_wps_start_nfc(wpa_s, res->peer_device_addr, res->peer_interface_addr, wpa_s->parent->p2p_oob_dev_pw, wpa_s->parent->p2p_oob_dev_pw_id, 1, wpa_s->parent->p2p_oob_dev_pw_id == DEV_PW_NFC_CONNECTION_HANDOVER ? wpa_s->parent->p2p_peer_oob_pubkey_hash : NULL, NULL, 0); #endif /* CONFIG_WPS_NFC */ } else { u16 dev_pw_id = DEV_PW_DEFAULT; if (wpa_s->p2p_wps_method == WPS_PIN_KEYPAD) dev_pw_id = DEV_PW_REGISTRAR_SPECIFIED; wpas_wps_start_pin(wpa_s, res->peer_interface_addr, wpa_s->p2p_pin, 1, dev_pw_id); } } static void wpas_p2p_add_psk_list(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { struct wpa_ssid *persistent; struct psk_list_entry *psk; struct hostapd_data *hapd; if (!wpa_s->ap_iface) return; persistent = wpas_p2p_get_persistent(wpa_s->parent, NULL, ssid->ssid, ssid->ssid_len); if (persistent == NULL) return; hapd = wpa_s->ap_iface->bss[0]; dl_list_for_each(psk, &persistent->psk_list, struct psk_list_entry, list) { struct hostapd_wpa_psk *hpsk; wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add persistent group PSK entry for " MACSTR " psk=%d", MAC2STR(psk->addr), psk->p2p); hpsk = os_zalloc(sizeof(*hpsk)); if (hpsk == NULL) break; os_memcpy(hpsk->psk, psk->psk, PMK_LEN); if (psk->p2p) os_memcpy(hpsk->p2p_dev_addr, psk->addr, ETH_ALEN); else os_memcpy(hpsk->addr, psk->addr, ETH_ALEN); hpsk->next = hapd->conf->ssid.wpa_psk; hapd->conf->ssid.wpa_psk = hpsk; } } static void p2p_go_configured(void *ctx, void *data) { struct wpa_supplicant *wpa_s = ctx; struct p2p_go_neg_results *params = data; struct wpa_ssid *ssid; int network_id = -1; ssid = wpa_s->current_ssid; if (ssid && ssid->mode == WPAS_MODE_P2P_GO) { wpa_printf(MSG_DEBUG, "P2P: Group setup without provisioning"); if (wpa_s->global->p2p_group_formation == wpa_s) wpa_s->global->p2p_group_formation = NULL; if (os_strlen(params->passphrase) > 0) { wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED "%s GO ssid=\"%s\" freq=%d " "passphrase=\"%s\" go_dev_addr=" MACSTR "%s", wpa_s->ifname, wpa_ssid_txt(ssid->ssid, ssid->ssid_len), ssid->frequency, params->passphrase, MAC2STR(wpa_s->global->p2p_dev_addr), params->persistent_group ? " [PERSISTENT]" : ""); } else { char psk[65]; wpa_snprintf_hex(psk, sizeof(psk), params->psk, sizeof(params->psk)); wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED "%s GO ssid=\"%s\" freq=%d psk=%s " "go_dev_addr=" MACSTR "%s", wpa_s->ifname, wpa_ssid_txt(ssid->ssid, ssid->ssid_len), ssid->frequency, psk, MAC2STR(wpa_s->global->p2p_dev_addr), params->persistent_group ? " [PERSISTENT]" : ""); } os_get_reltime(&wpa_s->global->p2p_go_wait_client); if (params->persistent_group) { network_id = wpas_p2p_store_persistent_group( wpa_s->parent, ssid, wpa_s->global->p2p_dev_addr); wpas_p2p_add_psk_list(wpa_s, ssid); } if (network_id < 0) network_id = ssid->id; wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 0); wpas_p2p_cross_connect_setup(wpa_s); wpas_p2p_set_group_idle_timeout(wpa_s); if (wpa_s->p2p_first_connection_timeout) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Start group formation timeout of %d seconds until first data connection on GO", wpa_s->p2p_first_connection_timeout); wpa_s->p2p_go_group_formation_completed = 0; wpa_s->global->p2p_group_formation = wpa_s; eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); eloop_register_timeout( wpa_s->p2p_first_connection_timeout, 0, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); } return; } wpa_printf(MSG_DEBUG, "P2P: Setting up WPS for GO provisioning"); if (wpa_supplicant_ap_mac_addr_filter(wpa_s, params->peer_interface_addr)) { wpa_printf(MSG_DEBUG, "P2P: Failed to setup MAC address " "filtering"); return; } if (params->wps_method == WPS_PBC) { wpa_supplicant_ap_wps_pbc(wpa_s, params->peer_interface_addr, params->peer_device_addr); #ifdef CONFIG_WPS_NFC } else if (params->wps_method == WPS_NFC) { if (wpa_s->parent->p2p_oob_dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && !wpa_s->parent->p2p_oob_dev_pw) { wpa_printf(MSG_DEBUG, "P2P: No NFC Dev Pw known"); return; } wpas_ap_wps_add_nfc_pw( wpa_s, wpa_s->parent->p2p_oob_dev_pw_id, wpa_s->parent->p2p_oob_dev_pw, wpa_s->parent->p2p_peer_oob_pk_hash_known ? wpa_s->parent->p2p_peer_oob_pubkey_hash : NULL); #endif /* CONFIG_WPS_NFC */ } else if (wpa_s->p2p_pin[0]) wpa_supplicant_ap_wps_pin(wpa_s, params->peer_interface_addr, wpa_s->p2p_pin, NULL, 0, 0); os_free(wpa_s->go_params); wpa_s->go_params = NULL; } static void wpas_start_wps_go(struct wpa_supplicant *wpa_s, struct p2p_go_neg_results *params, int group_formation) { struct wpa_ssid *ssid; wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Starting GO"); if (wpas_copy_go_neg_results(wpa_s, params) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not copy GO Negotiation " "results"); return; } ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not add network for GO"); return; } wpa_s->show_group_started = 0; wpa_config_set_network_defaults(ssid); ssid->temporary = 1; ssid->p2p_group = 1; ssid->p2p_persistent_group = params->persistent_group; ssid->mode = group_formation ? WPAS_MODE_P2P_GROUP_FORMATION : WPAS_MODE_P2P_GO; ssid->frequency = params->freq; ssid->ht40 = params->ht40; ssid->vht = params->vht; ssid->ssid = os_zalloc(params->ssid_len + 1); if (ssid->ssid) { os_memcpy(ssid->ssid, params->ssid, params->ssid_len); ssid->ssid_len = params->ssid_len; } ssid->auth_alg = WPA_AUTH_ALG_OPEN; ssid->key_mgmt = WPA_KEY_MGMT_PSK; ssid->proto = WPA_PROTO_RSN; ssid->pairwise_cipher = WPA_CIPHER_CCMP; if (os_strlen(params->passphrase) > 0) { ssid->passphrase = os_strdup(params->passphrase); if (ssid->passphrase == NULL) { wpa_msg_global(wpa_s, MSG_ERROR, "P2P: Failed to copy passphrase for GO"); wpa_config_remove_network(wpa_s->conf, ssid->id); return; } } else ssid->passphrase = NULL; ssid->psk_set = params->psk_set; if (ssid->psk_set) os_memcpy(ssid->psk, params->psk, sizeof(ssid->psk)); else if (ssid->passphrase) wpa_config_update_psk(ssid); ssid->ap_max_inactivity = wpa_s->parent->conf->p2p_go_max_inactivity; wpa_s->ap_configured_cb = p2p_go_configured; wpa_s->ap_configured_cb_ctx = wpa_s; wpa_s->ap_configured_cb_data = wpa_s->go_params; wpa_s->connect_without_scan = ssid; wpa_s->reassociate = 1; wpa_s->disconnected = 0; wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Request scan (that will be skipped) to " "start GO)"); wpa_supplicant_req_scan(wpa_s, 0, 0); } static void wpas_p2p_clone_config(struct wpa_supplicant *dst, const struct wpa_supplicant *src) { struct wpa_config *d; const struct wpa_config *s; d = dst->conf; s = src->conf; #define C(n) if (s->n) d->n = os_strdup(s->n) C(device_name); C(manufacturer); C(model_name); C(model_number); C(serial_number); C(config_methods); #undef C os_memcpy(d->device_type, s->device_type, WPS_DEV_TYPE_LEN); os_memcpy(d->sec_device_type, s->sec_device_type, sizeof(d->sec_device_type)); d->num_sec_device_types = s->num_sec_device_types; d->p2p_group_idle = s->p2p_group_idle; d->p2p_intra_bss = s->p2p_intra_bss; d->persistent_reconnect = s->persistent_reconnect; d->max_num_sta = s->max_num_sta; d->pbc_in_m1 = s->pbc_in_m1; d->ignore_old_scan_res = s->ignore_old_scan_res; d->beacon_int = s->beacon_int; d->dtim_period = s->dtim_period; d->disassoc_low_ack = s->disassoc_low_ack; d->disable_scan_offload = s->disable_scan_offload; if (s->wps_nfc_dh_privkey && s->wps_nfc_dh_pubkey) { d->wps_nfc_dh_privkey = wpabuf_dup(s->wps_nfc_dh_privkey); d->wps_nfc_dh_pubkey = wpabuf_dup(s->wps_nfc_dh_pubkey); } } static void wpas_p2p_get_group_ifname(struct wpa_supplicant *wpa_s, char *ifname, size_t len) { char *ifname_ptr = wpa_s->ifname; if (os_strncmp(wpa_s->ifname, P2P_MGMT_DEVICE_PREFIX, os_strlen(P2P_MGMT_DEVICE_PREFIX)) == 0) { ifname_ptr = os_strrchr(wpa_s->ifname, '-') + 1; } os_snprintf(ifname, len, "p2p-%s-%d", ifname_ptr, wpa_s->p2p_group_idx); if (os_strlen(ifname) >= IFNAMSIZ && os_strlen(wpa_s->ifname) < IFNAMSIZ) { /* Try to avoid going over the IFNAMSIZ length limit */ os_snprintf(ifname, len, "p2p-%d", wpa_s->p2p_group_idx); } } static int wpas_p2p_add_group_interface(struct wpa_supplicant *wpa_s, enum wpa_driver_if_type type) { char ifname[120], force_ifname[120]; if (wpa_s->pending_interface_name[0]) { wpa_printf(MSG_DEBUG, "P2P: Pending virtual interface exists " "- skip creation of a new one"); if (is_zero_ether_addr(wpa_s->pending_interface_addr)) { wpa_printf(MSG_DEBUG, "P2P: Pending virtual address " "unknown?! ifname='%s'", wpa_s->pending_interface_name); return -1; } return 0; } wpas_p2p_get_group_ifname(wpa_s, ifname, sizeof(ifname)); force_ifname[0] = '\0'; wpa_printf(MSG_DEBUG, "P2P: Create a new interface %s for the group", ifname); wpa_s->p2p_group_idx++; wpa_s->pending_interface_type = type; if (wpa_drv_if_add(wpa_s, type, ifname, NULL, NULL, force_ifname, wpa_s->pending_interface_addr, NULL) < 0) { wpa_printf(MSG_ERROR, "P2P: Failed to create new group " "interface"); return -1; } if (force_ifname[0]) { wpa_printf(MSG_DEBUG, "P2P: Driver forced interface name %s", force_ifname); os_strlcpy(wpa_s->pending_interface_name, force_ifname, sizeof(wpa_s->pending_interface_name)); } else os_strlcpy(wpa_s->pending_interface_name, ifname, sizeof(wpa_s->pending_interface_name)); wpa_printf(MSG_DEBUG, "P2P: Created pending virtual interface %s addr " MACSTR, wpa_s->pending_interface_name, MAC2STR(wpa_s->pending_interface_addr)); return 0; } static void wpas_p2p_remove_pending_group_interface( struct wpa_supplicant *wpa_s) { if (!wpa_s->pending_interface_name[0] || is_zero_ether_addr(wpa_s->pending_interface_addr)) return; /* No pending virtual interface */ wpa_printf(MSG_DEBUG, "P2P: Removing pending group interface %s", wpa_s->pending_interface_name); wpa_drv_if_remove(wpa_s, wpa_s->pending_interface_type, wpa_s->pending_interface_name); os_memset(wpa_s->pending_interface_addr, 0, ETH_ALEN); wpa_s->pending_interface_name[0] = '\0'; } static struct wpa_supplicant * wpas_p2p_init_group_interface(struct wpa_supplicant *wpa_s, int go) { struct wpa_interface iface; struct wpa_supplicant *group_wpa_s; if (!wpa_s->pending_interface_name[0]) { wpa_printf(MSG_ERROR, "P2P: No pending group interface"); if (!wpas_p2p_create_iface(wpa_s)) return NULL; /* * Something has forced us to remove the pending interface; try * to create a new one and hope for the best that we will get * the same local address. */ if (wpas_p2p_add_group_interface(wpa_s, go ? WPA_IF_P2P_GO : WPA_IF_P2P_CLIENT) < 0) return NULL; } os_memset(&iface, 0, sizeof(iface)); iface.ifname = wpa_s->pending_interface_name; iface.driver = wpa_s->driver->name; if (wpa_s->conf->ctrl_interface == NULL && wpa_s->parent != wpa_s && wpa_s->p2p_mgmt && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE)) iface.ctrl_interface = wpa_s->parent->conf->ctrl_interface; else iface.ctrl_interface = wpa_s->conf->ctrl_interface; iface.driver_param = wpa_s->conf->driver_param; group_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface); if (group_wpa_s == NULL) { wpa_printf(MSG_ERROR, "P2P: Failed to create new " "wpa_supplicant interface"); return NULL; } wpa_s->pending_interface_name[0] = '\0'; group_wpa_s->parent = wpa_s; group_wpa_s->p2p_group_interface = go ? P2P_GROUP_INTERFACE_GO : P2P_GROUP_INTERFACE_CLIENT; wpa_s->global->p2p_group_formation = group_wpa_s; wpas_p2p_clone_config(group_wpa_s, wpa_s); return group_wpa_s; } static void wpas_p2p_group_formation_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; wpa_printf(MSG_DEBUG, "P2P: Group Formation timed out"); wpas_p2p_group_formation_failed(wpa_s); } void wpas_p2p_group_formation_failed(struct wpa_supplicant *wpa_s) { eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); if (wpa_s->global->p2p) p2p_group_formation_failed(wpa_s->global->p2p); wpas_group_formation_completed(wpa_s, 0); } static void wpas_p2p_grpform_fail_after_wps(struct wpa_supplicant *wpa_s) { wpa_printf(MSG_DEBUG, "P2P: Reject group formation due to WPS provisioning failure"); eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); wpa_s->global->p2p_fail_on_wps_complete = 0; } void wpas_p2p_ap_setup_failed(struct wpa_supplicant *wpa_s) { if (wpa_s->global->p2p_group_formation != wpa_s) return; /* Speed up group formation timeout since this cannot succeed */ eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); } static void wpas_go_neg_completed(void *ctx, struct p2p_go_neg_results *res) { struct wpa_supplicant *wpa_s = ctx; if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) { wpa_drv_cancel_remain_on_channel(wpa_s); wpa_s->off_channel_freq = 0; wpa_s->roc_waiting_drv_freq = 0; } if (res->status) { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_FAILURE "status=%d", res->status); wpas_notify_p2p_go_neg_completed(wpa_s, res); wpas_p2p_remove_pending_group_interface(wpa_s); return; } if (wpa_s->p2p_go_ht40) res->ht40 = 1; if (wpa_s->p2p_go_vht) res->vht = 1; wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_SUCCESS "role=%s " "freq=%d ht40=%d peer_dev=" MACSTR " peer_iface=" MACSTR " wps_method=%s", res->role_go ? "GO" : "client", res->freq, res->ht40, MAC2STR(res->peer_device_addr), MAC2STR(res->peer_interface_addr), p2p_wps_method_text(res->wps_method)); wpas_notify_p2p_go_neg_completed(wpa_s, res); if (res->role_go && wpa_s->p2p_persistent_id >= 0) { struct wpa_ssid *ssid; ssid = wpa_config_get_network(wpa_s->conf, wpa_s->p2p_persistent_id); if (ssid && ssid->disabled == 2 && ssid->mode == WPAS_MODE_P2P_GO && ssid->passphrase) { size_t len = os_strlen(ssid->passphrase); wpa_printf(MSG_DEBUG, "P2P: Override passphrase based " "on requested persistent group"); os_memcpy(res->passphrase, ssid->passphrase, len); res->passphrase[len] = '\0'; } } if (wpa_s->create_p2p_iface) { struct wpa_supplicant *group_wpa_s = wpas_p2p_init_group_interface(wpa_s, res->role_go); if (group_wpa_s == NULL) { wpas_p2p_remove_pending_group_interface(wpa_s); return; } if (group_wpa_s != wpa_s) { os_memcpy(group_wpa_s->p2p_pin, wpa_s->p2p_pin, sizeof(group_wpa_s->p2p_pin)); group_wpa_s->p2p_wps_method = wpa_s->p2p_wps_method; } os_memset(wpa_s->pending_interface_addr, 0, ETH_ALEN); wpa_s->pending_interface_name[0] = '\0'; group_wpa_s->p2p_in_provisioning = 1; if (res->role_go) wpas_start_wps_go(group_wpa_s, res, 1); else wpas_start_wps_enrollee(group_wpa_s, res); } else { wpa_s->p2p_in_provisioning = 1; wpa_s->global->p2p_group_formation = wpa_s; if (res->role_go) wpas_start_wps_go(wpa_s, res, 1); else wpas_start_wps_enrollee(ctx, res); } wpa_s->p2p_long_listen = 0; eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL); eloop_register_timeout(15 + res->peer_config_timeout / 100, (res->peer_config_timeout % 100) * 10000, wpas_p2p_group_formation_timeout, wpa_s, NULL); } static void wpas_go_neg_req_rx(void *ctx, const u8 *src, u16 dev_passwd_id) { struct wpa_supplicant *wpa_s = ctx; wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_GO_NEG_REQUEST MACSTR " dev_passwd_id=%u", MAC2STR(src), dev_passwd_id); wpas_notify_p2p_go_neg_req(wpa_s, src, dev_passwd_id); } static void wpas_dev_found(void *ctx, const u8 *addr, const struct p2p_peer_info *info, int new_device) { #ifndef CONFIG_NO_STDOUT_DEBUG struct wpa_supplicant *wpa_s = ctx; char devtype[WPS_DEV_TYPE_BUFSIZE]; char *wfd_dev_info_hex = NULL; #ifdef CONFIG_WIFI_DISPLAY wfd_dev_info_hex = wifi_display_subelem_hex(info->wfd_subelems, WFD_SUBELEM_DEVICE_INFO); #endif /* CONFIG_WIFI_DISPLAY */ wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_DEVICE_FOUND MACSTR " p2p_dev_addr=" MACSTR " pri_dev_type=%s name='%s' config_methods=0x%x " "dev_capab=0x%x group_capab=0x%x%s%s", MAC2STR(addr), MAC2STR(info->p2p_device_addr), wps_dev_type_bin2str(info->pri_dev_type, devtype, sizeof(devtype)), info->device_name, info->config_methods, info->dev_capab, info->group_capab, wfd_dev_info_hex ? " wfd_dev_info=0x" : "", wfd_dev_info_hex ? wfd_dev_info_hex : ""); #endif /* CONFIG_NO_STDOUT_DEBUG */ os_free(wfd_dev_info_hex); wpas_notify_p2p_device_found(ctx, info->p2p_device_addr, new_device); } static void wpas_dev_lost(void *ctx, const u8 *dev_addr) { struct wpa_supplicant *wpa_s = ctx; wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_DEVICE_LOST "p2p_dev_addr=" MACSTR, MAC2STR(dev_addr)); wpas_notify_p2p_device_lost(wpa_s, dev_addr); } static void wpas_find_stopped(void *ctx) { struct wpa_supplicant *wpa_s = ctx; wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_FIND_STOPPED); } struct wpas_p2p_listen_work { unsigned int freq; unsigned int duration; struct wpabuf *probe_resp_ie; }; static void wpas_p2p_listen_work_free(struct wpas_p2p_listen_work *lwork) { if (lwork == NULL) return; wpabuf_free(lwork->probe_resp_ie); os_free(lwork); } static void wpas_p2p_listen_work_done(struct wpa_supplicant *wpa_s) { struct wpas_p2p_listen_work *lwork; if (!wpa_s->p2p_listen_work) return; lwork = wpa_s->p2p_listen_work->ctx; wpas_p2p_listen_work_free(lwork); radio_work_done(wpa_s->p2p_listen_work); wpa_s->p2p_listen_work = NULL; } static void wpas_start_listen_cb(struct wpa_radio_work *work, int deinit) { struct wpa_supplicant *wpa_s = work->wpa_s; struct wpas_p2p_listen_work *lwork = work->ctx; if (deinit) { wpas_p2p_listen_work_free(lwork); return; } wpa_s->p2p_listen_work = work; wpa_drv_set_ap_wps_ie(wpa_s, NULL, lwork->probe_resp_ie, NULL); if (wpa_drv_probe_req_report(wpa_s, 1) < 0) { wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver to " "report received Probe Request frames"); wpas_p2p_listen_work_done(wpa_s); return; } wpa_s->pending_listen_freq = lwork->freq; wpa_s->pending_listen_duration = lwork->duration; if (wpa_drv_remain_on_channel(wpa_s, lwork->freq, lwork->duration) < 0) { wpa_printf(MSG_DEBUG, "P2P: Failed to request the driver " "to remain on channel (%u MHz) for Listen " "state", lwork->freq); wpas_p2p_listen_work_done(wpa_s); wpa_s->pending_listen_freq = 0; return; } wpa_s->off_channel_freq = 0; wpa_s->roc_waiting_drv_freq = lwork->freq; } static int wpas_start_listen(void *ctx, unsigned int freq, unsigned int duration, const struct wpabuf *probe_resp_ie) { struct wpa_supplicant *wpa_s = ctx; struct wpas_p2p_listen_work *lwork; if (wpa_s->p2p_listen_work) { wpa_printf(MSG_DEBUG, "P2P: Reject start_listen since p2p_listen_work already exists"); return -1; } lwork = os_zalloc(sizeof(*lwork)); if (lwork == NULL) return -1; lwork->freq = freq; lwork->duration = duration; if (probe_resp_ie) { lwork->probe_resp_ie = wpabuf_dup(probe_resp_ie); if (lwork->probe_resp_ie == NULL) { wpas_p2p_listen_work_free(lwork); return -1; } } if (radio_add_work(wpa_s, freq, "p2p-listen", 0, wpas_start_listen_cb, lwork) < 0) { wpas_p2p_listen_work_free(lwork); return -1; } return 0; } static void wpas_stop_listen(void *ctx) { struct wpa_supplicant *wpa_s = ctx; if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) { wpa_drv_cancel_remain_on_channel(wpa_s); wpa_s->off_channel_freq = 0; wpa_s->roc_waiting_drv_freq = 0; } wpa_drv_set_ap_wps_ie(wpa_s, NULL, NULL, NULL); wpa_drv_probe_req_report(wpa_s, 0); wpas_p2p_listen_work_done(wpa_s); } static int wpas_send_probe_resp(void *ctx, const struct wpabuf *buf) { struct wpa_supplicant *wpa_s = ctx; return wpa_drv_send_mlme(wpa_s, wpabuf_head(buf), wpabuf_len(buf), 1); } /* * DNS Header section is used only to calculate compression pointers, so the * contents of this data does not matter, but the length needs to be reserved * in the virtual packet. */ #define DNS_HEADER_LEN 12 /* * 27-octet in-memory packet from P2P specification containing two implied * queries for _tcp.lcoal. PTR IN and _udp.local. PTR IN */ #define P2P_SD_IN_MEMORY_LEN 27 static int p2p_sd_dns_uncompress_label(char **upos, char *uend, u8 *start, u8 **spos, const u8 *end) { while (*spos < end) { u8 val = ((*spos)[0] & 0xc0) >> 6; int len; if (val == 1 || val == 2) { /* These are reserved values in RFC 1035 */ wpa_printf(MSG_DEBUG, "P2P: Invalid domain name " "sequence starting with 0x%x", val); return -1; } if (val == 3) { u16 offset; u8 *spos_tmp; /* Offset */ if (*spos + 2 > end) { wpa_printf(MSG_DEBUG, "P2P: No room for full " "DNS offset field"); return -1; } offset = (((*spos)[0] & 0x3f) << 8) | (*spos)[1]; if (offset >= *spos - start) { wpa_printf(MSG_DEBUG, "P2P: Invalid DNS " "pointer offset %u", offset); return -1; } (*spos) += 2; spos_tmp = start + offset; return p2p_sd_dns_uncompress_label(upos, uend, start, &spos_tmp, *spos - 2); } /* Label */ len = (*spos)[0] & 0x3f; if (len == 0) return 0; (*spos)++; if (*spos + len > end) { wpa_printf(MSG_DEBUG, "P2P: Invalid domain name " "sequence - no room for label with length " "%u", len); return -1; } if (*upos + len + 2 > uend) return -2; os_memcpy(*upos, *spos, len); *spos += len; *upos += len; (*upos)[0] = '.'; (*upos)++; (*upos)[0] = '\0'; } return 0; } /* Uncompress domain names per RFC 1035 using the P2P SD in-memory packet. * Returns -1 on parsing error (invalid input sequence), -2 if output buffer is * not large enough */ static int p2p_sd_dns_uncompress(char *buf, size_t buf_len, const u8 *msg, size_t msg_len, size_t offset) { /* 27-octet in-memory packet from P2P specification */ const char *prefix = "\x04_tcp\x05local\x00\x00\x0C\x00\x01" "\x04_udp\xC0\x11\x00\x0C\x00\x01"; u8 *tmp, *end, *spos; char *upos, *uend; int ret = 0; if (buf_len < 2) return -1; if (offset > msg_len) return -1; tmp = os_malloc(DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN + msg_len); if (tmp == NULL) return -1; spos = tmp + DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN; end = spos + msg_len; spos += offset; os_memset(tmp, 0, DNS_HEADER_LEN); os_memcpy(tmp + DNS_HEADER_LEN, prefix, P2P_SD_IN_MEMORY_LEN); os_memcpy(tmp + DNS_HEADER_LEN + P2P_SD_IN_MEMORY_LEN, msg, msg_len); upos = buf; uend = buf + buf_len; ret = p2p_sd_dns_uncompress_label(&upos, uend, tmp, &spos, end); if (ret) { os_free(tmp); return ret; } if (upos == buf) { upos[0] = '.'; upos[1] = '\0'; } else if (upos[-1] == '.') upos[-1] = '\0'; os_free(tmp); return 0; } static struct p2p_srv_bonjour * wpas_p2p_service_get_bonjour(struct wpa_supplicant *wpa_s, const struct wpabuf *query) { struct p2p_srv_bonjour *bsrv; size_t len; len = wpabuf_len(query); dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour, struct p2p_srv_bonjour, list) { if (len == wpabuf_len(bsrv->query) && os_memcmp(wpabuf_head(query), wpabuf_head(bsrv->query), len) == 0) return bsrv; } return NULL; } static struct p2p_srv_upnp * wpas_p2p_service_get_upnp(struct wpa_supplicant *wpa_s, u8 version, const char *service) { struct p2p_srv_upnp *usrv; dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp, struct p2p_srv_upnp, list) { if (version == usrv->version && os_strcmp(service, usrv->service) == 0) return usrv; } return NULL; } static void wpas_sd_add_proto_not_avail(struct wpabuf *resp, u8 srv_proto, u8 srv_trans_id) { u8 *len_pos; if (wpabuf_tailroom(resp) < 5) return; /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, srv_proto); wpabuf_put_u8(resp, srv_trans_id); /* Status Code */ wpabuf_put_u8(resp, P2P_SD_PROTO_NOT_AVAILABLE); /* Response Data: empty */ WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } static void wpas_sd_all_bonjour(struct wpa_supplicant *wpa_s, struct wpabuf *resp, u8 srv_trans_id) { struct p2p_srv_bonjour *bsrv; u8 *len_pos; wpa_printf(MSG_DEBUG, "P2P: SD Request for all Bonjour services"); if (dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) { wpa_printf(MSG_DEBUG, "P2P: Bonjour protocol not available"); return; } dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour, struct p2p_srv_bonjour, list) { if (wpabuf_tailroom(resp) < 5 + wpabuf_len(bsrv->query) + wpabuf_len(bsrv->resp)) return; /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, P2P_SERV_BONJOUR); wpabuf_put_u8(resp, srv_trans_id); /* Status Code */ wpabuf_put_u8(resp, P2P_SD_SUCCESS); wpa_hexdump_ascii(MSG_DEBUG, "P2P: Matching Bonjour service", wpabuf_head(bsrv->resp), wpabuf_len(bsrv->resp)); /* Response Data */ wpabuf_put_buf(resp, bsrv->query); /* Key */ wpabuf_put_buf(resp, bsrv->resp); /* Value */ WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } } static int match_bonjour_query(struct p2p_srv_bonjour *bsrv, const u8 *query, size_t query_len) { char str_rx[256], str_srv[256]; if (query_len < 3 || wpabuf_len(bsrv->query) < 3) return 0; /* Too short to include DNS Type and Version */ if (os_memcmp(query + query_len - 3, wpabuf_head_u8(bsrv->query) + wpabuf_len(bsrv->query) - 3, 3) != 0) return 0; /* Mismatch in DNS Type or Version */ if (query_len == wpabuf_len(bsrv->query) && os_memcmp(query, wpabuf_head(bsrv->query), query_len - 3) == 0) return 1; /* Binary match */ if (p2p_sd_dns_uncompress(str_rx, sizeof(str_rx), query, query_len - 3, 0)) return 0; /* Failed to uncompress query */ if (p2p_sd_dns_uncompress(str_srv, sizeof(str_srv), wpabuf_head(bsrv->query), wpabuf_len(bsrv->query) - 3, 0)) return 0; /* Failed to uncompress service */ return os_strcmp(str_rx, str_srv) == 0; } static void wpas_sd_req_bonjour(struct wpa_supplicant *wpa_s, struct wpabuf *resp, u8 srv_trans_id, const u8 *query, size_t query_len) { struct p2p_srv_bonjour *bsrv; u8 *len_pos; int matches = 0; wpa_hexdump_ascii(MSG_DEBUG, "P2P: SD Request for Bonjour", query, query_len); if (dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) { wpa_printf(MSG_DEBUG, "P2P: Bonjour protocol not available"); wpas_sd_add_proto_not_avail(resp, P2P_SERV_BONJOUR, srv_trans_id); return; } if (query_len == 0) { wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id); return; } dl_list_for_each(bsrv, &wpa_s->global->p2p_srv_bonjour, struct p2p_srv_bonjour, list) { if (!match_bonjour_query(bsrv, query, query_len)) continue; if (wpabuf_tailroom(resp) < 5 + query_len + wpabuf_len(bsrv->resp)) return; matches++; /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, P2P_SERV_BONJOUR); wpabuf_put_u8(resp, srv_trans_id); /* Status Code */ wpabuf_put_u8(resp, P2P_SD_SUCCESS); wpa_hexdump_ascii(MSG_DEBUG, "P2P: Matching Bonjour service", wpabuf_head(bsrv->resp), wpabuf_len(bsrv->resp)); /* Response Data */ wpabuf_put_data(resp, query, query_len); /* Key */ wpabuf_put_buf(resp, bsrv->resp); /* Value */ WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } if (matches == 0) { wpa_printf(MSG_DEBUG, "P2P: Requested Bonjour service not " "available"); if (wpabuf_tailroom(resp) < 5) return; /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, P2P_SERV_BONJOUR); wpabuf_put_u8(resp, srv_trans_id); /* Status Code */ wpabuf_put_u8(resp, P2P_SD_REQUESTED_INFO_NOT_AVAILABLE); /* Response Data: empty */ WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } } static void wpas_sd_all_upnp(struct wpa_supplicant *wpa_s, struct wpabuf *resp, u8 srv_trans_id) { struct p2p_srv_upnp *usrv; u8 *len_pos; wpa_printf(MSG_DEBUG, "P2P: SD Request for all UPnP services"); if (dl_list_empty(&wpa_s->global->p2p_srv_upnp)) { wpa_printf(MSG_DEBUG, "P2P: UPnP protocol not available"); return; } dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp, struct p2p_srv_upnp, list) { if (wpabuf_tailroom(resp) < 5 + 1 + os_strlen(usrv->service)) return; /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, P2P_SERV_UPNP); wpabuf_put_u8(resp, srv_trans_id); /* Status Code */ wpabuf_put_u8(resp, P2P_SD_SUCCESS); /* Response Data */ wpabuf_put_u8(resp, usrv->version); wpa_printf(MSG_DEBUG, "P2P: Matching UPnP Service: %s", usrv->service); wpabuf_put_str(resp, usrv->service); WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } } static void wpas_sd_req_upnp(struct wpa_supplicant *wpa_s, struct wpabuf *resp, u8 srv_trans_id, const u8 *query, size_t query_len) { struct p2p_srv_upnp *usrv; u8 *len_pos; u8 version; char *str; int count = 0; wpa_hexdump_ascii(MSG_DEBUG, "P2P: SD Request for UPnP", query, query_len); if (dl_list_empty(&wpa_s->global->p2p_srv_upnp)) { wpa_printf(MSG_DEBUG, "P2P: UPnP protocol not available"); wpas_sd_add_proto_not_avail(resp, P2P_SERV_UPNP, srv_trans_id); return; } if (query_len == 0) { wpas_sd_all_upnp(wpa_s, resp, srv_trans_id); return; } if (wpabuf_tailroom(resp) < 5) return; /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, P2P_SERV_UPNP); wpabuf_put_u8(resp, srv_trans_id); version = query[0]; str = os_malloc(query_len); if (str == NULL) return; os_memcpy(str, query + 1, query_len - 1); str[query_len - 1] = '\0'; dl_list_for_each(usrv, &wpa_s->global->p2p_srv_upnp, struct p2p_srv_upnp, list) { if (version != usrv->version) continue; if (os_strcmp(str, "ssdp:all") != 0 && os_strstr(usrv->service, str) == NULL) continue; if (wpabuf_tailroom(resp) < 2) break; if (count == 0) { /* Status Code */ wpabuf_put_u8(resp, P2P_SD_SUCCESS); /* Response Data */ wpabuf_put_u8(resp, version); } else wpabuf_put_u8(resp, ','); count++; wpa_printf(MSG_DEBUG, "P2P: Matching UPnP Service: %s", usrv->service); if (wpabuf_tailroom(resp) < os_strlen(usrv->service)) break; wpabuf_put_str(resp, usrv->service); } os_free(str); if (count == 0) { wpa_printf(MSG_DEBUG, "P2P: Requested UPnP service not " "available"); /* Status Code */ wpabuf_put_u8(resp, P2P_SD_REQUESTED_INFO_NOT_AVAILABLE); /* Response Data: empty */ } WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } #ifdef CONFIG_WIFI_DISPLAY static void wpas_sd_req_wfd(struct wpa_supplicant *wpa_s, struct wpabuf *resp, u8 srv_trans_id, const u8 *query, size_t query_len) { const u8 *pos; u8 role; u8 *len_pos; wpa_hexdump(MSG_DEBUG, "P2P: SD Request for WFD", query, query_len); if (!wpa_s->global->wifi_display) { wpa_printf(MSG_DEBUG, "P2P: WFD protocol not available"); wpas_sd_add_proto_not_avail(resp, P2P_SERV_WIFI_DISPLAY, srv_trans_id); return; } if (query_len < 1) { wpa_printf(MSG_DEBUG, "P2P: Missing WFD Requested Device " "Role"); return; } if (wpabuf_tailroom(resp) < 5) return; pos = query; role = *pos++; wpa_printf(MSG_DEBUG, "P2P: WSD for device role 0x%x", role); /* TODO: role specific handling */ /* Length (to be filled) */ len_pos = wpabuf_put(resp, 2); wpabuf_put_u8(resp, P2P_SERV_WIFI_DISPLAY); wpabuf_put_u8(resp, srv_trans_id); wpabuf_put_u8(resp, P2P_SD_SUCCESS); /* Status Code */ while (pos < query + query_len) { if (*pos < MAX_WFD_SUBELEMS && wpa_s->global->wfd_subelem[*pos] && wpabuf_tailroom(resp) >= wpabuf_len(wpa_s->global->wfd_subelem[*pos])) { wpa_printf(MSG_DEBUG, "P2P: Add WSD response " "subelement %u", *pos); wpabuf_put_buf(resp, wpa_s->global->wfd_subelem[*pos]); } pos++; } WPA_PUT_LE16(len_pos, (u8 *) wpabuf_put(resp, 0) - len_pos - 2); } #endif /* CONFIG_WIFI_DISPLAY */ static void wpas_sd_request(void *ctx, int freq, const u8 *sa, u8 dialog_token, u16 update_indic, const u8 *tlvs, size_t tlvs_len) { struct wpa_supplicant *wpa_s = ctx; const u8 *pos = tlvs; const u8 *end = tlvs + tlvs_len; const u8 *tlv_end; u16 slen; struct wpabuf *resp; u8 srv_proto, srv_trans_id; size_t buf_len; char *buf; wpa_hexdump(MSG_MSGDUMP, "P2P: Service Discovery Request TLVs", tlvs, tlvs_len); buf_len = 2 * tlvs_len + 1; buf = os_malloc(buf_len); if (buf) { wpa_snprintf_hex(buf, buf_len, tlvs, tlvs_len); wpa_msg_ctrl(wpa_s, MSG_INFO, P2P_EVENT_SERV_DISC_REQ "%d " MACSTR " %u %u %s", freq, MAC2STR(sa), dialog_token, update_indic, buf); os_free(buf); } if (wpa_s->p2p_sd_over_ctrl_iface) { wpas_notify_p2p_sd_request(wpa_s, freq, sa, dialog_token, update_indic, tlvs, tlvs_len); return; /* to be processed by an external program */ } resp = wpabuf_alloc(10000); if (resp == NULL) return; while (pos + 1 < end) { wpa_printf(MSG_DEBUG, "P2P: Service Request TLV"); slen = WPA_GET_LE16(pos); pos += 2; if (pos + slen > end || slen < 2) { wpa_printf(MSG_DEBUG, "P2P: Unexpected Query Data " "length"); wpabuf_free(resp); return; } tlv_end = pos + slen; srv_proto = *pos++; wpa_printf(MSG_DEBUG, "P2P: Service Protocol Type %u", srv_proto); srv_trans_id = *pos++; wpa_printf(MSG_DEBUG, "P2P: Service Transaction ID %u", srv_trans_id); wpa_hexdump(MSG_MSGDUMP, "P2P: Query Data", pos, tlv_end - pos); if (wpa_s->force_long_sd) { wpa_printf(MSG_DEBUG, "P2P: SD test - force long " "response"); wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id); wpas_sd_all_upnp(wpa_s, resp, srv_trans_id); goto done; } switch (srv_proto) { case P2P_SERV_ALL_SERVICES: wpa_printf(MSG_DEBUG, "P2P: Service Discovery Request " "for all services"); if (dl_list_empty(&wpa_s->global->p2p_srv_upnp) && dl_list_empty(&wpa_s->global->p2p_srv_bonjour)) { wpa_printf(MSG_DEBUG, "P2P: No service " "discovery protocols available"); wpas_sd_add_proto_not_avail( resp, P2P_SERV_ALL_SERVICES, srv_trans_id); break; } wpas_sd_all_bonjour(wpa_s, resp, srv_trans_id); wpas_sd_all_upnp(wpa_s, resp, srv_trans_id); break; case P2P_SERV_BONJOUR: wpas_sd_req_bonjour(wpa_s, resp, srv_trans_id, pos, tlv_end - pos); break; case P2P_SERV_UPNP: wpas_sd_req_upnp(wpa_s, resp, srv_trans_id, pos, tlv_end - pos); break; #ifdef CONFIG_WIFI_DISPLAY case P2P_SERV_WIFI_DISPLAY: wpas_sd_req_wfd(wpa_s, resp, srv_trans_id, pos, tlv_end - pos); break; #endif /* CONFIG_WIFI_DISPLAY */ default: wpa_printf(MSG_DEBUG, "P2P: Unavailable service " "protocol %u", srv_proto); wpas_sd_add_proto_not_avail(resp, srv_proto, srv_trans_id); break; } pos = tlv_end; } done: wpas_notify_p2p_sd_request(wpa_s, freq, sa, dialog_token, update_indic, tlvs, tlvs_len); wpas_p2p_sd_response(wpa_s, freq, sa, dialog_token, resp); wpabuf_free(resp); } static void wpas_sd_response(void *ctx, const u8 *sa, u16 update_indic, const u8 *tlvs, size_t tlvs_len) { struct wpa_supplicant *wpa_s = ctx; const u8 *pos = tlvs; const u8 *end = tlvs + tlvs_len; const u8 *tlv_end; u16 slen; size_t buf_len; char *buf; wpa_hexdump(MSG_MSGDUMP, "P2P: Service Discovery Response TLVs", tlvs, tlvs_len); if (tlvs_len > 1500) { /* TODO: better way for handling this */ wpa_msg_ctrl(wpa_s, MSG_INFO, P2P_EVENT_SERV_DISC_RESP MACSTR " %u ", MAC2STR(sa), update_indic, (unsigned int) tlvs_len); } else { buf_len = 2 * tlvs_len + 1; buf = os_malloc(buf_len); if (buf) { wpa_snprintf_hex(buf, buf_len, tlvs, tlvs_len); wpa_msg_ctrl(wpa_s, MSG_INFO, P2P_EVENT_SERV_DISC_RESP MACSTR " %u %s", MAC2STR(sa), update_indic, buf); os_free(buf); } } while (pos < end) { u8 srv_proto, srv_trans_id, status; wpa_printf(MSG_DEBUG, "P2P: Service Response TLV"); slen = WPA_GET_LE16(pos); pos += 2; if (pos + slen > end || slen < 3) { wpa_printf(MSG_DEBUG, "P2P: Unexpected Response Data " "length"); return; } tlv_end = pos + slen; srv_proto = *pos++; wpa_printf(MSG_DEBUG, "P2P: Service Protocol Type %u", srv_proto); srv_trans_id = *pos++; wpa_printf(MSG_DEBUG, "P2P: Service Transaction ID %u", srv_trans_id); status = *pos++; wpa_printf(MSG_DEBUG, "P2P: Status Code ID %u", status); wpa_hexdump(MSG_MSGDUMP, "P2P: Response Data", pos, tlv_end - pos); pos = tlv_end; } wpas_notify_p2p_sd_response(wpa_s, sa, update_indic, tlvs, tlvs_len); } u64 wpas_p2p_sd_request(struct wpa_supplicant *wpa_s, const u8 *dst, const struct wpabuf *tlvs) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return 0; return (uintptr_t) p2p_sd_request(wpa_s->global->p2p, dst, tlvs); } u64 wpas_p2p_sd_request_upnp(struct wpa_supplicant *wpa_s, const u8 *dst, u8 version, const char *query) { struct wpabuf *tlvs; u64 ret; tlvs = wpabuf_alloc(2 + 1 + 1 + 1 + os_strlen(query)); if (tlvs == NULL) return 0; wpabuf_put_le16(tlvs, 1 + 1 + 1 + os_strlen(query)); wpabuf_put_u8(tlvs, P2P_SERV_UPNP); /* Service Protocol Type */ wpabuf_put_u8(tlvs, 1); /* Service Transaction ID */ wpabuf_put_u8(tlvs, version); wpabuf_put_str(tlvs, query); ret = wpas_p2p_sd_request(wpa_s, dst, tlvs); wpabuf_free(tlvs); return ret; } #ifdef CONFIG_WIFI_DISPLAY static u64 wpas_p2p_sd_request_wfd(struct wpa_supplicant *wpa_s, const u8 *dst, const struct wpabuf *tlvs) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return 0; return (uintptr_t) p2p_sd_request_wfd(wpa_s->global->p2p, dst, tlvs); } #define MAX_WFD_SD_SUBELEMS 20 static void wfd_add_sd_req_role(struct wpabuf *tlvs, u8 id, u8 role, const char *subelems) { u8 *len; const char *pos; int val; int count = 0; len = wpabuf_put(tlvs, 2); wpabuf_put_u8(tlvs, P2P_SERV_WIFI_DISPLAY); /* Service Protocol Type */ wpabuf_put_u8(tlvs, id); /* Service Transaction ID */ wpabuf_put_u8(tlvs, role); pos = subelems; while (*pos) { val = atoi(pos); if (val >= 0 && val < 256) { wpabuf_put_u8(tlvs, val); count++; if (count == MAX_WFD_SD_SUBELEMS) break; } pos = os_strchr(pos + 1, ','); if (pos == NULL) break; pos++; } WPA_PUT_LE16(len, (u8 *) wpabuf_put(tlvs, 0) - len - 2); } u64 wpas_p2p_sd_request_wifi_display(struct wpa_supplicant *wpa_s, const u8 *dst, const char *role) { struct wpabuf *tlvs; u64 ret; const char *subelems; u8 id = 1; subelems = os_strchr(role, ' '); if (subelems == NULL) return 0; subelems++; tlvs = wpabuf_alloc(4 * (2 + 1 + 1 + 1 + MAX_WFD_SD_SUBELEMS)); if (tlvs == NULL) return 0; if (os_strstr(role, "[source]")) wfd_add_sd_req_role(tlvs, id++, 0x00, subelems); if (os_strstr(role, "[pri-sink]")) wfd_add_sd_req_role(tlvs, id++, 0x01, subelems); if (os_strstr(role, "[sec-sink]")) wfd_add_sd_req_role(tlvs, id++, 0x02, subelems); if (os_strstr(role, "[source+sink]")) wfd_add_sd_req_role(tlvs, id++, 0x03, subelems); ret = wpas_p2p_sd_request_wfd(wpa_s, dst, tlvs); wpabuf_free(tlvs); return ret; } #endif /* CONFIG_WIFI_DISPLAY */ int wpas_p2p_sd_cancel_request(struct wpa_supplicant *wpa_s, u64 req) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; return p2p_sd_cancel_request(wpa_s->global->p2p, (void *) (uintptr_t) req); } void wpas_p2p_sd_response(struct wpa_supplicant *wpa_s, int freq, const u8 *dst, u8 dialog_token, const struct wpabuf *resp_tlvs) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return; p2p_sd_response(wpa_s->global->p2p, freq, dst, dialog_token, resp_tlvs); } void wpas_p2p_sd_service_update(struct wpa_supplicant *wpa_s) { if (wpa_s->global->p2p) p2p_sd_service_update(wpa_s->global->p2p); } static void wpas_p2p_srv_bonjour_free(struct p2p_srv_bonjour *bsrv) { dl_list_del(&bsrv->list); wpabuf_free(bsrv->query); wpabuf_free(bsrv->resp); os_free(bsrv); } static void wpas_p2p_srv_upnp_free(struct p2p_srv_upnp *usrv) { dl_list_del(&usrv->list); os_free(usrv->service); os_free(usrv); } void wpas_p2p_service_flush(struct wpa_supplicant *wpa_s) { struct p2p_srv_bonjour *bsrv, *bn; struct p2p_srv_upnp *usrv, *un; dl_list_for_each_safe(bsrv, bn, &wpa_s->global->p2p_srv_bonjour, struct p2p_srv_bonjour, list) wpas_p2p_srv_bonjour_free(bsrv); dl_list_for_each_safe(usrv, un, &wpa_s->global->p2p_srv_upnp, struct p2p_srv_upnp, list) wpas_p2p_srv_upnp_free(usrv); wpas_p2p_sd_service_update(wpa_s); } int wpas_p2p_service_add_bonjour(struct wpa_supplicant *wpa_s, struct wpabuf *query, struct wpabuf *resp) { struct p2p_srv_bonjour *bsrv; bsrv = os_zalloc(sizeof(*bsrv)); if (bsrv == NULL) return -1; bsrv->query = query; bsrv->resp = resp; dl_list_add(&wpa_s->global->p2p_srv_bonjour, &bsrv->list); wpas_p2p_sd_service_update(wpa_s); return 0; } int wpas_p2p_service_del_bonjour(struct wpa_supplicant *wpa_s, const struct wpabuf *query) { struct p2p_srv_bonjour *bsrv; bsrv = wpas_p2p_service_get_bonjour(wpa_s, query); if (bsrv == NULL) return -1; wpas_p2p_srv_bonjour_free(bsrv); wpas_p2p_sd_service_update(wpa_s); return 0; } int wpas_p2p_service_add_upnp(struct wpa_supplicant *wpa_s, u8 version, const char *service) { struct p2p_srv_upnp *usrv; if (wpas_p2p_service_get_upnp(wpa_s, version, service)) return 0; /* Already listed */ usrv = os_zalloc(sizeof(*usrv)); if (usrv == NULL) return -1; usrv->version = version; usrv->service = os_strdup(service); if (usrv->service == NULL) { os_free(usrv); return -1; } dl_list_add(&wpa_s->global->p2p_srv_upnp, &usrv->list); wpas_p2p_sd_service_update(wpa_s); return 0; } int wpas_p2p_service_del_upnp(struct wpa_supplicant *wpa_s, u8 version, const char *service) { struct p2p_srv_upnp *usrv; usrv = wpas_p2p_service_get_upnp(wpa_s, version, service); if (usrv == NULL) return -1; wpas_p2p_srv_upnp_free(usrv); wpas_p2p_sd_service_update(wpa_s); return 0; } static void wpas_prov_disc_local_display(struct wpa_supplicant *wpa_s, const u8 *peer, const char *params, unsigned int generated_pin) { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_SHOW_PIN MACSTR " %08d%s", MAC2STR(peer), generated_pin, params); } static void wpas_prov_disc_local_keypad(struct wpa_supplicant *wpa_s, const u8 *peer, const char *params) { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_ENTER_PIN MACSTR "%s", MAC2STR(peer), params); } static void wpas_prov_disc_req(void *ctx, const u8 *peer, u16 config_methods, const u8 *dev_addr, const u8 *pri_dev_type, const char *dev_name, u16 supp_config_methods, u8 dev_capab, u8 group_capab, const u8 *group_id, size_t group_id_len) { struct wpa_supplicant *wpa_s = ctx; char devtype[WPS_DEV_TYPE_BUFSIZE]; char params[300]; u8 empty_dev_type[8]; unsigned int generated_pin = 0; struct wpa_supplicant *group = NULL; if (group_id) { for (group = wpa_s->global->ifaces; group; group = group->next) { struct wpa_ssid *s = group->current_ssid; if (s != NULL && s->mode == WPAS_MODE_P2P_GO && group_id_len - ETH_ALEN == s->ssid_len && os_memcmp(group_id + ETH_ALEN, s->ssid, s->ssid_len) == 0) break; } } if (pri_dev_type == NULL) { os_memset(empty_dev_type, 0, sizeof(empty_dev_type)); pri_dev_type = empty_dev_type; } os_snprintf(params, sizeof(params), " p2p_dev_addr=" MACSTR " pri_dev_type=%s name='%s' config_methods=0x%x " "dev_capab=0x%x group_capab=0x%x%s%s", MAC2STR(dev_addr), wps_dev_type_bin2str(pri_dev_type, devtype, sizeof(devtype)), dev_name, supp_config_methods, dev_capab, group_capab, group ? " group=" : "", group ? group->ifname : ""); params[sizeof(params) - 1] = '\0'; if (config_methods & WPS_CONFIG_DISPLAY) { generated_pin = wps_generate_pin(); wpas_prov_disc_local_display(wpa_s, peer, params, generated_pin); } else if (config_methods & WPS_CONFIG_KEYPAD) wpas_prov_disc_local_keypad(wpa_s, peer, params); else if (config_methods & WPS_CONFIG_PUSHBUTTON) wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_PBC_REQ MACSTR "%s", MAC2STR(peer), params); wpas_notify_p2p_provision_discovery(wpa_s, peer, 1 /* request */, P2P_PROV_DISC_SUCCESS, config_methods, generated_pin); } static void wpas_prov_disc_resp(void *ctx, const u8 *peer, u16 config_methods) { struct wpa_supplicant *wpa_s = ctx; unsigned int generated_pin = 0; char params[20]; if (wpa_s->pending_pd_before_join && (os_memcmp(peer, wpa_s->pending_join_dev_addr, ETH_ALEN) == 0 || os_memcmp(peer, wpa_s->pending_join_iface_addr, ETH_ALEN) == 0)) { wpa_s->pending_pd_before_join = 0; wpa_printf(MSG_DEBUG, "P2P: Starting pending " "join-existing-group operation"); wpas_p2p_join_start(wpa_s, 0, NULL, 0); return; } if (wpa_s->pending_pd_use == AUTO_PD_JOIN || wpa_s->pending_pd_use == AUTO_PD_GO_NEG) os_snprintf(params, sizeof(params), " peer_go=%d", wpa_s->pending_pd_use == AUTO_PD_JOIN); else params[0] = '\0'; if (config_methods & WPS_CONFIG_DISPLAY) wpas_prov_disc_local_keypad(wpa_s, peer, params); else if (config_methods & WPS_CONFIG_KEYPAD) { generated_pin = wps_generate_pin(); wpas_prov_disc_local_display(wpa_s, peer, params, generated_pin); } else if (config_methods & WPS_CONFIG_PUSHBUTTON) wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_PBC_RESP MACSTR "%s", MAC2STR(peer), params); wpas_notify_p2p_provision_discovery(wpa_s, peer, 0 /* response */, P2P_PROV_DISC_SUCCESS, config_methods, generated_pin); } static void wpas_prov_disc_fail(void *ctx, const u8 *peer, enum p2p_prov_disc_status status) { struct wpa_supplicant *wpa_s = ctx; if (wpa_s->p2p_fallback_to_go_neg) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: PD for p2p_connect-auto " "failed - fall back to GO Negotiation"); wpas_p2p_fallback_to_go_neg(wpa_s, 0); return; } if (status == P2P_PROV_DISC_TIMEOUT_JOIN) { wpa_s->pending_pd_before_join = 0; wpa_printf(MSG_DEBUG, "P2P: Starting pending " "join-existing-group operation (no ACK for PD " "Req attempts)"); wpas_p2p_join_start(wpa_s, 0, NULL, 0); return; } wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_FAILURE " p2p_dev_addr=" MACSTR " status=%d", MAC2STR(peer), status); wpas_notify_p2p_provision_discovery(wpa_s, peer, 0 /* response */, status, 0, 0); } static int freq_included(const struct p2p_channels *channels, unsigned int freq) { if (channels == NULL) return 1; /* Assume no restrictions */ return p2p_channels_includes_freq(channels, freq); } static u8 wpas_invitation_process(void *ctx, const u8 *sa, const u8 *bssid, const u8 *go_dev_addr, const u8 *ssid, size_t ssid_len, int *go, u8 *group_bssid, int *force_freq, int persistent_group, const struct p2p_channels *channels, int dev_pw_id) { struct wpa_supplicant *wpa_s = ctx; struct wpa_ssid *s; int res; struct wpa_supplicant *grp; if (!persistent_group) { wpa_printf(MSG_DEBUG, "P2P: Invitation from " MACSTR " to join an active group (SSID: %s)", MAC2STR(sa), wpa_ssid_txt(ssid, ssid_len)); if (!is_zero_ether_addr(wpa_s->p2p_auth_invite) && (os_memcmp(go_dev_addr, wpa_s->p2p_auth_invite, ETH_ALEN) == 0 || os_memcmp(sa, wpa_s->p2p_auth_invite, ETH_ALEN) == 0)) { wpa_printf(MSG_DEBUG, "P2P: Accept previously " "authorized invitation"); goto accept_inv; } #ifdef CONFIG_WPS_NFC if (dev_pw_id >= 0 && wpa_s->parent->p2p_nfc_tag_enabled && dev_pw_id == wpa_s->parent->p2p_oob_dev_pw_id) { wpa_printf(MSG_DEBUG, "P2P: Accept invitation based on local enabled NFC Tag"); wpa_s->parent->p2p_wps_method = WPS_NFC; wpa_s->parent->pending_join_wps_method = WPS_NFC; os_memcpy(wpa_s->parent->pending_join_dev_addr, go_dev_addr, ETH_ALEN); os_memcpy(wpa_s->parent->pending_join_iface_addr, bssid, ETH_ALEN); goto accept_inv; } #endif /* CONFIG_WPS_NFC */ /* * Do not accept the invitation automatically; notify user and * request approval. */ return P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; } grp = wpas_get_p2p_group(wpa_s, ssid, ssid_len, go); if (grp) { wpa_printf(MSG_DEBUG, "P2P: Accept invitation to already " "running persistent group"); if (*go) os_memcpy(group_bssid, grp->own_addr, ETH_ALEN); goto accept_inv; } if (!is_zero_ether_addr(wpa_s->p2p_auth_invite) && os_memcmp(sa, wpa_s->p2p_auth_invite, ETH_ALEN) == 0) { wpa_printf(MSG_DEBUG, "P2P: Accept previously initiated " "invitation to re-invoke a persistent group"); } else if (!wpa_s->conf->persistent_reconnect) return P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE; for (s = wpa_s->conf->ssid; s; s = s->next) { if (s->disabled == 2 && os_memcmp(s->bssid, go_dev_addr, ETH_ALEN) == 0 && s->ssid_len == ssid_len && os_memcmp(ssid, s->ssid, ssid_len) == 0) break; } if (!s) { wpa_printf(MSG_DEBUG, "P2P: Invitation from " MACSTR " requested reinvocation of an unknown group", MAC2STR(sa)); return P2P_SC_FAIL_UNKNOWN_GROUP; } if (s->mode == WPAS_MODE_P2P_GO && !wpas_p2p_create_iface(wpa_s)) { *go = 1; if (wpa_s->wpa_state >= WPA_AUTHENTICATING) { wpa_printf(MSG_DEBUG, "P2P: The only available " "interface is already in use - reject " "invitation"); return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; } os_memcpy(group_bssid, wpa_s->own_addr, ETH_ALEN); } else if (s->mode == WPAS_MODE_P2P_GO) { *go = 1; if (wpas_p2p_add_group_interface(wpa_s, WPA_IF_P2P_GO) < 0) { wpa_printf(MSG_ERROR, "P2P: Failed to allocate a new " "interface address for the group"); return P2P_SC_FAIL_UNABLE_TO_ACCOMMODATE; } os_memcpy(group_bssid, wpa_s->pending_interface_addr, ETH_ALEN); } accept_inv: wpas_p2p_set_own_freq_preference(wpa_s, 0); /* Get one of the frequencies currently in use */ if (wpas_p2p_valid_oper_freqs(wpa_s, &res, 1) > 0) { wpa_printf(MSG_DEBUG, "P2P: Trying to prefer a channel already used by one of the interfaces"); wpas_p2p_set_own_freq_preference(wpa_s, res); if (wpa_s->num_multichan_concurrent < 2 || wpas_p2p_num_unused_channels(wpa_s) < 1) { wpa_printf(MSG_DEBUG, "P2P: No extra channels available - trying to force channel to match a channel already used by one of the interfaces"); *force_freq = res; } } if (*force_freq > 0 && wpa_s->num_multichan_concurrent > 1 && wpas_p2p_num_unused_channels(wpa_s) > 0) { if (*go == 0) { /* We are the client */ wpa_printf(MSG_DEBUG, "P2P: Peer was found to be " "running a GO but we are capable of MCC, " "figure out the best channel to use"); *force_freq = 0; } else if (!freq_included(channels, *force_freq)) { /* We are the GO, and *force_freq is not in the * intersection */ wpa_printf(MSG_DEBUG, "P2P: Forced GO freq %d MHz not " "in intersection but we are capable of MCC, " "figure out the best channel to use", *force_freq); *force_freq = 0; } } return P2P_SC_SUCCESS; } static void wpas_invitation_received(void *ctx, const u8 *sa, const u8 *bssid, const u8 *ssid, size_t ssid_len, const u8 *go_dev_addr, u8 status, int op_freq) { struct wpa_supplicant *wpa_s = ctx; struct wpa_ssid *s; for (s = wpa_s->conf->ssid; s; s = s->next) { if (s->disabled == 2 && s->ssid_len == ssid_len && os_memcmp(ssid, s->ssid, ssid_len) == 0) break; } if (status == P2P_SC_SUCCESS) { wpa_printf(MSG_DEBUG, "P2P: Invitation from peer " MACSTR " was accepted; op_freq=%d MHz, SSID=%s", MAC2STR(sa), op_freq, wpa_ssid_txt(ssid, ssid_len)); if (s) { int go = s->mode == WPAS_MODE_P2P_GO; wpas_p2p_group_add_persistent( wpa_s, s, go, go ? op_freq : 0, 0, 0, NULL, go ? P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE : 0); } else if (bssid) { wpa_s->user_initiated_pd = 0; wpas_p2p_join(wpa_s, bssid, go_dev_addr, wpa_s->p2p_wps_method, 0, op_freq, ssid, ssid_len); } return; } if (status != P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) { wpa_printf(MSG_DEBUG, "P2P: Invitation from peer " MACSTR " was rejected (status %u)", MAC2STR(sa), status); return; } if (!s) { if (bssid) { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RECEIVED "sa=" MACSTR " go_dev_addr=" MACSTR " bssid=" MACSTR " unknown-network", MAC2STR(sa), MAC2STR(go_dev_addr), MAC2STR(bssid)); } else { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RECEIVED "sa=" MACSTR " go_dev_addr=" MACSTR " unknown-network", MAC2STR(sa), MAC2STR(go_dev_addr)); } return; } if (s->mode == WPAS_MODE_P2P_GO && op_freq) { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RECEIVED "sa=" MACSTR " persistent=%d freq=%d", MAC2STR(sa), s->id, op_freq); } else { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RECEIVED "sa=" MACSTR " persistent=%d", MAC2STR(sa), s->id); } } static void wpas_remove_persistent_peer(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, const u8 *peer, int inv) { size_t i; if (ssid == NULL) return; for (i = 0; ssid->p2p_client_list && i < ssid->num_p2p_clients; i++) { if (os_memcmp(ssid->p2p_client_list + i * ETH_ALEN, peer, ETH_ALEN) == 0) break; } if (i >= ssid->num_p2p_clients) { if (ssid->mode != WPAS_MODE_P2P_GO && os_memcmp(ssid->bssid, peer, ETH_ALEN) == 0) { wpa_printf(MSG_DEBUG, "P2P: Remove persistent group %d " "due to invitation result", ssid->id); wpas_notify_network_removed(wpa_s, ssid); wpa_config_remove_network(wpa_s->conf, ssid->id); return; } return; /* Peer not found in client list */ } wpa_printf(MSG_DEBUG, "P2P: Remove peer " MACSTR " from persistent " "group %d client list%s", MAC2STR(peer), ssid->id, inv ? " due to invitation result" : ""); os_memmove(ssid->p2p_client_list + i * ETH_ALEN, ssid->p2p_client_list + (i + 1) * ETH_ALEN, (ssid->num_p2p_clients - i - 1) * ETH_ALEN); ssid->num_p2p_clients--; #ifndef CONFIG_NO_CONFIG_WRITE if (wpa_s->parent->conf->update_config && wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf)) wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration"); #endif /* CONFIG_NO_CONFIG_WRITE */ } static void wpas_remove_persistent_client(struct wpa_supplicant *wpa_s, const u8 *peer) { struct wpa_ssid *ssid; wpa_s = wpa_s->global->p2p_invite_group; if (wpa_s == NULL) return; /* No known invitation group */ ssid = wpa_s->current_ssid; if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GO || !ssid->p2p_persistent_group) return; /* Not operating as a GO in persistent group */ ssid = wpas_p2p_get_persistent(wpa_s->parent, peer, ssid->ssid, ssid->ssid_len); wpas_remove_persistent_peer(wpa_s, ssid, peer, 1); } static void wpas_invitation_result(void *ctx, int status, const u8 *bssid, const struct p2p_channels *channels, const u8 *peer, int neg_freq) { struct wpa_supplicant *wpa_s = ctx; struct wpa_ssid *ssid; int freq; if (bssid) { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RESULT "status=%d " MACSTR, status, MAC2STR(bssid)); } else { wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_INVITATION_RESULT "status=%d ", status); } wpas_notify_p2p_invitation_result(wpa_s, status, bssid); wpa_printf(MSG_DEBUG, "P2P: Invitation result - status=%d peer=" MACSTR, status, MAC2STR(peer)); if (wpa_s->pending_invite_ssid_id == -1) { if (status == P2P_SC_FAIL_UNKNOWN_GROUP) wpas_remove_persistent_client(wpa_s, peer); return; /* Invitation to active group */ } if (status == P2P_SC_FAIL_INFO_CURRENTLY_UNAVAILABLE) { wpa_printf(MSG_DEBUG, "P2P: Waiting for peer to start another " "invitation exchange to indicate readiness for " "re-invocation"); } if (status != P2P_SC_SUCCESS) { if (status == P2P_SC_FAIL_UNKNOWN_GROUP) { ssid = wpa_config_get_network( wpa_s->conf, wpa_s->pending_invite_ssid_id); wpas_remove_persistent_peer(wpa_s, ssid, peer, 1); } wpas_p2p_remove_pending_group_interface(wpa_s); return; } ssid = wpa_config_get_network(wpa_s->conf, wpa_s->pending_invite_ssid_id); if (ssid == NULL) { wpa_printf(MSG_ERROR, "P2P: Could not find persistent group " "data matching with invitation"); return; } /* * The peer could have missed our ctrl::ack frame for Invitation * Response and continue retransmitting the frame. To reduce the * likelihood of the peer not getting successful TX status for the * Invitation Response frame, wait a short time here before starting * the persistent group so that we will remain on the current channel to * acknowledge any possible retransmission from the peer. */ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: 50 ms wait on current channel before " "starting persistent group"); os_sleep(0, 50000); freq = wpa_s->p2p_persistent_go_freq; if (neg_freq > 0 && ssid->mode == WPAS_MODE_P2P_GO && freq_included(channels, neg_freq)) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use frequence %d MHz from invitation for GO mode", neg_freq); freq = neg_freq; } wpas_p2p_group_add_persistent(wpa_s, ssid, ssid->mode == WPAS_MODE_P2P_GO, freq, wpa_s->p2p_go_ht40, wpa_s->p2p_go_vht, channels, ssid->mode == WPAS_MODE_P2P_GO ? P2P_MAX_INITIAL_CONN_WAIT_GO_REINVOKE : 0); } static int wpas_p2p_disallowed_freq(struct wpa_global *global, unsigned int freq) { if (freq_range_list_includes(&global->p2p_go_avoid_freq, freq)) return 1; return freq_range_list_includes(&global->p2p_disallow_freq, freq); } static void wpas_p2p_add_chan(struct p2p_reg_class *reg, u8 chan) { reg->channel[reg->channels] = chan; reg->channels++; } static int wpas_p2p_default_channels(struct wpa_supplicant *wpa_s, struct p2p_channels *chan, struct p2p_channels *cli_chan) { int i, cla = 0; os_memset(cli_chan, 0, sizeof(*cli_chan)); wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for 2.4 GHz " "band"); /* Operating class 81 - 2.4 GHz band channels 1..13 */ chan->reg_class[cla].reg_class = 81; chan->reg_class[cla].channels = 0; for (i = 0; i < 11; i++) { if (!wpas_p2p_disallowed_freq(wpa_s->global, 2412 + i * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], i + 1); } if (chan->reg_class[cla].channels) cla++; wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for lower 5 GHz " "band"); /* Operating class 115 - 5 GHz, channels 36-48 */ chan->reg_class[cla].reg_class = 115; chan->reg_class[cla].channels = 0; if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 36 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 36); if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 40 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 40); if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 44 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 44); if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 48 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 48); if (chan->reg_class[cla].channels) cla++; wpa_printf(MSG_DEBUG, "P2P: Enable operating classes for higher 5 GHz " "band"); /* Operating class 124 - 5 GHz, channels 149,153,157,161 */ chan->reg_class[cla].reg_class = 124; chan->reg_class[cla].channels = 0; if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 149 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 149); if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 153 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 153); if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 156 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 157); if (!wpas_p2p_disallowed_freq(wpa_s->global, 5000 + 161 * 5)) wpas_p2p_add_chan(&chan->reg_class[cla], 161); if (chan->reg_class[cla].channels) cla++; chan->reg_classes = cla; return 0; } static struct hostapd_hw_modes * get_mode(struct hostapd_hw_modes *modes, u16 num_modes, enum hostapd_hw_mode mode) { u16 i; for (i = 0; i < num_modes; i++) { if (modes[i].mode == mode) return &modes[i]; } return NULL; } enum chan_allowed { NOT_ALLOWED, PASSIVE_ONLY, ALLOWED }; static int has_channel(struct wpa_global *global, struct hostapd_hw_modes *mode, u8 chan, int *flags) { int i; unsigned int freq; freq = (mode->mode == HOSTAPD_MODE_IEEE80211A ? 5000 : 2407) + chan * 5; if (wpas_p2p_disallowed_freq(global, freq)) return NOT_ALLOWED; for (i = 0; i < mode->num_channels; i++) { if (mode->channels[i].chan == chan) { if (flags) *flags = mode->channels[i].flag; if (mode->channels[i].flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_RADAR)) return NOT_ALLOWED; if (mode->channels[i].flag & (HOSTAPD_CHAN_PASSIVE_SCAN | HOSTAPD_CHAN_NO_IBSS)) return PASSIVE_ONLY; return ALLOWED; } } return NOT_ALLOWED; } struct p2p_oper_class_map { enum hostapd_hw_mode mode; u8 op_class; u8 min_chan; u8 max_chan; u8 inc; enum { BW20, BW40PLUS, BW40MINUS, BW80 } bw; }; static struct p2p_oper_class_map op_class[] = { { HOSTAPD_MODE_IEEE80211G, 81, 1, 13, 1, BW20 }, #if 0 /* Do not enable HT40 on 2 GHz for now */ { HOSTAPD_MODE_IEEE80211G, 83, 1, 9, 1, BW40PLUS }, { HOSTAPD_MODE_IEEE80211G, 84, 5, 13, 1, BW40MINUS }, #endif { HOSTAPD_MODE_IEEE80211A, 115, 36, 48, 4, BW20 }, { HOSTAPD_MODE_IEEE80211A, 124, 149, 161, 4, BW20 }, { HOSTAPD_MODE_IEEE80211A, 116, 36, 44, 8, BW40PLUS }, { HOSTAPD_MODE_IEEE80211A, 117, 40, 48, 8, BW40MINUS }, { HOSTAPD_MODE_IEEE80211A, 126, 149, 157, 8, BW40PLUS }, { HOSTAPD_MODE_IEEE80211A, 127, 153, 161, 8, BW40MINUS }, /* * IEEE P802.11ac/D7.0 Table E-4 actually talks about channel center * frequency index 42, 58, 106, 122, 138, 155 with channel spacing of * 80 MHz, but currently use the following definition for simplicity * (these center frequencies are not actual channels, which makes * has_channel() fail). wpas_p2p_verify_80mhz() should take care of * removing invalid channels. */ { HOSTAPD_MODE_IEEE80211A, 128, 36, 161, 4, BW80 }, { -1, 0, 0, 0, 0, BW20 } }; static int wpas_p2p_get_center_80mhz(struct wpa_supplicant *wpa_s, struct hostapd_hw_modes *mode, u8 channel) { u8 center_channels[] = { 42, 58, 106, 122, 138, 155 }; unsigned int i; if (mode->mode != HOSTAPD_MODE_IEEE80211A) return 0; for (i = 0; i < ARRAY_SIZE(center_channels); i++) /* * In 80 MHz, the bandwidth "spans" 12 channels (e.g., 36-48), * so the center channel is 6 channels away from the start/end. */ if (channel >= center_channels[i] - 6 && channel <= center_channels[i] + 6) return center_channels[i]; return 0; } static enum chan_allowed wpas_p2p_verify_80mhz(struct wpa_supplicant *wpa_s, struct hostapd_hw_modes *mode, u8 channel, u8 bw) { u8 center_chan; int i, flags; enum chan_allowed res, ret = ALLOWED; center_chan = wpas_p2p_get_center_80mhz(wpa_s, mode, channel); if (!center_chan) return NOT_ALLOWED; if (center_chan >= 58 && center_chan <= 138) return NOT_ALLOWED; /* Do not allow DFS channels for P2P */ /* check all the channels are available */ for (i = 0; i < 4; i++) { int adj_chan = center_chan - 6 + i * 4; res = has_channel(wpa_s->global, mode, adj_chan, &flags); if (res == NOT_ALLOWED) return NOT_ALLOWED; if (res == PASSIVE_ONLY) ret = PASSIVE_ONLY; if (i == 0 && !(flags & HOSTAPD_CHAN_VHT_10_70)) return NOT_ALLOWED; if (i == 1 && !(flags & HOSTAPD_CHAN_VHT_30_50)) return NOT_ALLOWED; if (i == 2 && !(flags & HOSTAPD_CHAN_VHT_50_30)) return NOT_ALLOWED; if (i == 3 && !(flags & HOSTAPD_CHAN_VHT_70_10)) return NOT_ALLOWED; } return ret; } static enum chan_allowed wpas_p2p_verify_channel(struct wpa_supplicant *wpa_s, struct hostapd_hw_modes *mode, u8 channel, u8 bw) { int flag; enum chan_allowed res, res2; res2 = res = has_channel(wpa_s->global, mode, channel, &flag); if (bw == BW40MINUS) { if (!(flag & HOSTAPD_CHAN_HT40MINUS)) return NOT_ALLOWED; res2 = has_channel(wpa_s->global, mode, channel - 4, NULL); } else if (bw == BW40PLUS) { if (!(flag & HOSTAPD_CHAN_HT40PLUS)) return NOT_ALLOWED; res2 = has_channel(wpa_s->global, mode, channel + 4, NULL); } else if (bw == BW80) { res2 = wpas_p2p_verify_80mhz(wpa_s, mode, channel, bw); } if (res == NOT_ALLOWED || res2 == NOT_ALLOWED) return NOT_ALLOWED; if (res == PASSIVE_ONLY || res2 == PASSIVE_ONLY) return PASSIVE_ONLY; return res; } static int wpas_p2p_setup_channels(struct wpa_supplicant *wpa_s, struct p2p_channels *chan, struct p2p_channels *cli_chan) { struct hostapd_hw_modes *mode; int cla, op, cli_cla; if (wpa_s->hw.modes == NULL) { wpa_printf(MSG_DEBUG, "P2P: Driver did not support fetching " "of all supported channels; assume dualband " "support"); return wpas_p2p_default_channels(wpa_s, chan, cli_chan); } cla = cli_cla = 0; for (op = 0; op_class[op].op_class; op++) { struct p2p_oper_class_map *o = &op_class[op]; u8 ch; struct p2p_reg_class *reg = NULL, *cli_reg = NULL; mode = get_mode(wpa_s->hw.modes, wpa_s->hw.num_modes, o->mode); if (mode == NULL) continue; for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) { enum chan_allowed res; res = wpas_p2p_verify_channel(wpa_s, mode, ch, o->bw); if (res == ALLOWED) { if (reg == NULL) { wpa_printf(MSG_DEBUG, "P2P: Add operating class %u", o->op_class); reg = &chan->reg_class[cla]; cla++; reg->reg_class = o->op_class; } reg->channel[reg->channels] = ch; reg->channels++; } else if (res == PASSIVE_ONLY && wpa_s->conf->p2p_add_cli_chan) { if (cli_reg == NULL) { wpa_printf(MSG_DEBUG, "P2P: Add operating class %u (client only)", o->op_class); cli_reg = &cli_chan->reg_class[cli_cla]; cli_cla++; cli_reg->reg_class = o->op_class; } cli_reg->channel[cli_reg->channels] = ch; cli_reg->channels++; } } if (reg) { wpa_hexdump(MSG_DEBUG, "P2P: Channels", reg->channel, reg->channels); } if (cli_reg) { wpa_hexdump(MSG_DEBUG, "P2P: Channels (client only)", cli_reg->channel, cli_reg->channels); } } chan->reg_classes = cla; cli_chan->reg_classes = cli_cla; return 0; } int wpas_p2p_get_ht40_mode(struct wpa_supplicant *wpa_s, struct hostapd_hw_modes *mode, u8 channel) { int op; enum chan_allowed ret; for (op = 0; op_class[op].op_class; op++) { struct p2p_oper_class_map *o = &op_class[op]; u8 ch; for (ch = o->min_chan; ch <= o->max_chan; ch += o->inc) { if (o->mode != HOSTAPD_MODE_IEEE80211A || o->bw == BW20 || ch != channel) continue; ret = wpas_p2p_verify_channel(wpa_s, mode, ch, o->bw); if (ret == ALLOWED) return (o->bw == BW40MINUS) ? -1 : 1; } } return 0; } int wpas_p2p_get_vht80_center(struct wpa_supplicant *wpa_s, struct hostapd_hw_modes *mode, u8 channel) { if (!wpas_p2p_verify_channel(wpa_s, mode, channel, BW80)) return 0; return wpas_p2p_get_center_80mhz(wpa_s, mode, channel); } static int wpas_get_noa(void *ctx, const u8 *interface_addr, u8 *buf, size_t buf_len) { struct wpa_supplicant *wpa_s = ctx; for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) { if (os_memcmp(wpa_s->own_addr, interface_addr, ETH_ALEN) == 0) break; } if (wpa_s == NULL) return -1; return wpa_drv_get_noa(wpa_s, buf, buf_len); } static int wpas_go_connected(void *ctx, const u8 *dev_addr) { struct wpa_supplicant *wpa_s = ctx; for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) { struct wpa_ssid *ssid = wpa_s->current_ssid; if (ssid == NULL) continue; if (ssid->mode != WPAS_MODE_INFRA) continue; if (wpa_s->wpa_state != WPA_COMPLETED && wpa_s->wpa_state != WPA_GROUP_HANDSHAKE) continue; if (os_memcmp(wpa_s->go_dev_addr, dev_addr, ETH_ALEN) == 0) return 1; } return 0; } static int wpas_is_concurrent_session_active(void *ctx) { struct wpa_supplicant *wpa_s = ctx; struct wpa_supplicant *ifs; for (ifs = wpa_s->global->ifaces; ifs; ifs = ifs->next) { if (ifs == wpa_s) continue; if (ifs->wpa_state > WPA_ASSOCIATED) return 1; } return 0; } static void wpas_p2p_debug_print(void *ctx, int level, const char *msg) { struct wpa_supplicant *wpa_s = ctx; wpa_msg_global(wpa_s, level, "P2P: %s", msg); } int wpas_p2p_add_p2pdev_interface(struct wpa_supplicant *wpa_s) { struct wpa_interface iface; struct wpa_supplicant *p2pdev_wpa_s; char ifname[100]; char force_name[100]; int ret; os_snprintf(ifname, sizeof(ifname), P2P_MGMT_DEVICE_PREFIX "%s", wpa_s->ifname); force_name[0] = '\0'; wpa_s->pending_interface_type = WPA_IF_P2P_DEVICE; ret = wpa_drv_if_add(wpa_s, WPA_IF_P2P_DEVICE, ifname, NULL, NULL, force_name, wpa_s->pending_interface_addr, NULL); if (ret < 0) { wpa_printf(MSG_DEBUG, "P2P: Failed to create P2P Device interface"); return ret; } os_strlcpy(wpa_s->pending_interface_name, ifname, sizeof(wpa_s->pending_interface_name)); os_memset(&iface, 0, sizeof(iface)); iface.p2p_mgmt = 1; iface.ifname = wpa_s->pending_interface_name; iface.driver = wpa_s->driver->name; iface.driver_param = wpa_s->conf->driver_param; iface.confname = wpa_s->confname; p2pdev_wpa_s = wpa_supplicant_add_iface(wpa_s->global, &iface); if (!p2pdev_wpa_s) { wpa_printf(MSG_DEBUG, "P2P: Failed to add P2P Device interface"); return -1; } p2pdev_wpa_s->parent = wpa_s; wpa_s->pending_interface_name[0] = '\0'; return 0; } static void wpas_presence_resp(void *ctx, const u8 *src, u8 status, const u8 *noa, size_t noa_len) { struct wpa_supplicant *wpa_s, *intf = ctx; char hex[100]; for (wpa_s = intf->global->ifaces; wpa_s; wpa_s = wpa_s->next) { if (wpa_s->waiting_presence_resp) break; } if (!wpa_s) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No group interface was waiting for presence response"); return; } wpa_s->waiting_presence_resp = 0; wpa_snprintf_hex(hex, sizeof(hex), noa, noa_len); wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_PRESENCE_RESPONSE "src=" MACSTR " status=%u noa=%s", MAC2STR(src), status, hex); } /** * wpas_p2p_init - Initialize P2P module for %wpa_supplicant * @global: Pointer to global data from wpa_supplicant_init() * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * Returns: 0 on success, -1 on failure */ int wpas_p2p_init(struct wpa_global *global, struct wpa_supplicant *wpa_s) { struct p2p_config p2p; unsigned int r; int i; if (wpa_s->conf->p2p_disabled) return 0; if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE)) return 0; if (global->p2p) return 0; os_memset(&p2p, 0, sizeof(p2p)); p2p.cb_ctx = wpa_s; p2p.debug_print = wpas_p2p_debug_print; p2p.p2p_scan = wpas_p2p_scan; p2p.send_action = wpas_send_action; p2p.send_action_done = wpas_send_action_done; p2p.go_neg_completed = wpas_go_neg_completed; p2p.go_neg_req_rx = wpas_go_neg_req_rx; p2p.dev_found = wpas_dev_found; p2p.dev_lost = wpas_dev_lost; p2p.find_stopped = wpas_find_stopped; p2p.start_listen = wpas_start_listen; p2p.stop_listen = wpas_stop_listen; p2p.send_probe_resp = wpas_send_probe_resp; p2p.sd_request = wpas_sd_request; p2p.sd_response = wpas_sd_response; p2p.prov_disc_req = wpas_prov_disc_req; p2p.prov_disc_resp = wpas_prov_disc_resp; p2p.prov_disc_fail = wpas_prov_disc_fail; p2p.invitation_process = wpas_invitation_process; p2p.invitation_received = wpas_invitation_received; p2p.invitation_result = wpas_invitation_result; p2p.get_noa = wpas_get_noa; p2p.go_connected = wpas_go_connected; p2p.presence_resp = wpas_presence_resp; p2p.is_concurrent_session_active = wpas_is_concurrent_session_active; os_memcpy(wpa_s->global->p2p_dev_addr, wpa_s->own_addr, ETH_ALEN); os_memcpy(p2p.dev_addr, wpa_s->global->p2p_dev_addr, ETH_ALEN); p2p.dev_name = wpa_s->conf->device_name; p2p.manufacturer = wpa_s->conf->manufacturer; p2p.model_name = wpa_s->conf->model_name; p2p.model_number = wpa_s->conf->model_number; p2p.serial_number = wpa_s->conf->serial_number; if (wpa_s->wps) { os_memcpy(p2p.uuid, wpa_s->wps->uuid, 16); p2p.config_methods = wpa_s->wps->config_methods; } if (wpa_s->conf->p2p_listen_reg_class && wpa_s->conf->p2p_listen_channel) { p2p.reg_class = wpa_s->conf->p2p_listen_reg_class; p2p.channel = wpa_s->conf->p2p_listen_channel; } else { p2p.reg_class = 81; /* * Pick one of the social channels randomly as the listen * channel. */ os_get_random((u8 *) &r, sizeof(r)); p2p.channel = 1 + (r % 3) * 5; } wpa_printf(MSG_DEBUG, "P2P: Own listen channel: %d", p2p.channel); if (wpa_s->conf->p2p_oper_reg_class && wpa_s->conf->p2p_oper_channel) { p2p.op_reg_class = wpa_s->conf->p2p_oper_reg_class; p2p.op_channel = wpa_s->conf->p2p_oper_channel; p2p.cfg_op_channel = 1; wpa_printf(MSG_DEBUG, "P2P: Configured operating channel: " "%d:%d", p2p.op_reg_class, p2p.op_channel); } else { p2p.op_reg_class = 81; /* * Use random operation channel from (1, 6, 11) if no other * preference is indicated. */ os_get_random((u8 *) &r, sizeof(r)); p2p.op_channel = 1 + (r % 3) * 5; p2p.cfg_op_channel = 0; wpa_printf(MSG_DEBUG, "P2P: Random operating channel: " "%d:%d", p2p.op_reg_class, p2p.op_channel); } if (wpa_s->conf->p2p_pref_chan && wpa_s->conf->num_p2p_pref_chan) { p2p.pref_chan = wpa_s->conf->p2p_pref_chan; p2p.num_pref_chan = wpa_s->conf->num_p2p_pref_chan; } if (wpa_s->conf->country[0] && wpa_s->conf->country[1]) { os_memcpy(p2p.country, wpa_s->conf->country, 2); p2p.country[2] = 0x04; } else os_memcpy(p2p.country, "XX\x04", 3); if (wpas_p2p_setup_channels(wpa_s, &p2p.channels, &p2p.cli_channels)) { wpa_printf(MSG_ERROR, "P2P: Failed to configure supported " "channel list"); return -1; } os_memcpy(p2p.pri_dev_type, wpa_s->conf->device_type, WPS_DEV_TYPE_LEN); p2p.num_sec_dev_types = wpa_s->conf->num_sec_device_types; os_memcpy(p2p.sec_dev_type, wpa_s->conf->sec_device_type, p2p.num_sec_dev_types * WPS_DEV_TYPE_LEN); p2p.concurrent_operations = !!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CONCURRENT); p2p.max_peers = 100; if (wpa_s->conf->p2p_ssid_postfix) { p2p.ssid_postfix_len = os_strlen(wpa_s->conf->p2p_ssid_postfix); if (p2p.ssid_postfix_len > sizeof(p2p.ssid_postfix)) p2p.ssid_postfix_len = sizeof(p2p.ssid_postfix); os_memcpy(p2p.ssid_postfix, wpa_s->conf->p2p_ssid_postfix, p2p.ssid_postfix_len); } p2p.p2p_intra_bss = wpa_s->conf->p2p_intra_bss; p2p.max_listen = wpa_s->max_remain_on_chan; global->p2p = p2p_init(&p2p); if (global->p2p == NULL) return -1; global->p2p_init_wpa_s = wpa_s; for (i = 0; i < MAX_WPS_VENDOR_EXT; i++) { if (wpa_s->conf->wps_vendor_ext[i] == NULL) continue; p2p_add_wps_vendor_extension( global->p2p, wpa_s->conf->wps_vendor_ext[i]); } p2p_set_no_go_freq(global->p2p, &wpa_s->conf->p2p_no_go_freq); return 0; } /** * wpas_p2p_deinit - Deinitialize per-interface P2P data * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * * This function deinitialize per-interface P2P data. */ void wpas_p2p_deinit(struct wpa_supplicant *wpa_s) { if (wpa_s->driver && wpa_s->drv_priv) wpa_drv_probe_req_report(wpa_s, 0); if (wpa_s->go_params) { /* Clear any stored provisioning info */ p2p_clear_provisioning_info( wpa_s->global->p2p, wpa_s->go_params->peer_device_addr); } os_free(wpa_s->go_params); wpa_s->go_params = NULL; eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL); wpa_s->p2p_long_listen = 0; eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL); wpas_p2p_remove_pending_group_interface(wpa_s); eloop_cancel_timeout(wpas_p2p_group_freq_conflict, wpa_s, NULL); wpas_p2p_listen_work_done(wpa_s); if (wpa_s->p2p_send_action_work) { os_free(wpa_s->p2p_send_action_work->ctx); radio_work_done(wpa_s->p2p_send_action_work); wpa_s->p2p_send_action_work = NULL; } eloop_cancel_timeout(wpas_p2p_send_action_work_timeout, wpa_s, NULL); wpabuf_free(wpa_s->p2p_oob_dev_pw); wpa_s->p2p_oob_dev_pw = NULL; /* TODO: remove group interface from the driver if this wpa_s instance * is on top of a P2P group interface */ } /** * wpas_p2p_deinit_global - Deinitialize global P2P module * @global: Pointer to global data from wpa_supplicant_init() * * This function deinitializes the global (per device) P2P module. */ void wpas_p2p_deinit_global(struct wpa_global *global) { struct wpa_supplicant *wpa_s, *tmp; wpa_s = global->ifaces; if (wpa_s) wpas_p2p_service_flush(wpa_s); if (global->p2p == NULL) return; /* Remove remaining P2P group interfaces */ while (wpa_s && wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE) wpa_s = wpa_s->next; while (wpa_s) { tmp = global->ifaces; while (tmp && (tmp == wpa_s || tmp->p2p_group_interface == NOT_P2P_GROUP_INTERFACE)) { tmp = tmp->next; } if (tmp == NULL) break; /* Disconnect from the P2P group and deinit the interface */ wpas_p2p_disconnect(tmp); } /* * Deinit GO data on any possibly remaining interface (if main * interface is used as GO). */ for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { if (wpa_s->ap_iface) wpas_p2p_group_deinit(wpa_s); } p2p_deinit(global->p2p); global->p2p = NULL; global->p2p_init_wpa_s = NULL; } static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s) { if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_DEDICATED_P2P_DEVICE) && wpa_s->conf->p2p_no_group_iface) return 0; /* separate interface disabled per configuration */ if (wpa_s->drv_flags & (WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE | WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P)) return 1; /* P2P group requires a new interface in every case */ if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CONCURRENT)) return 0; /* driver does not support concurrent operations */ if (wpa_s->global->ifaces->next) return 1; /* more that one interface already in use */ if (wpa_s->wpa_state >= WPA_AUTHENTICATING) return 1; /* this interface is already in use */ return 0; } static int wpas_p2p_start_go_neg(struct wpa_supplicant *wpa_s, 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, struct wpa_ssid *ssid, unsigned int pref_freq) { if (persistent_group && wpa_s->conf->persistent_reconnect) persistent_group = 2; /* * Increase GO config timeout if HT40 is used since it takes some time * to scan channels for coex purposes before the BSS can be started. */ p2p_set_config_timeout(wpa_s->global->p2p, wpa_s->p2p_go_ht40 ? 255 : 100, 20); return p2p_connect(wpa_s->global->p2p, peer_addr, wps_method, go_intent, own_interface_addr, force_freq, persistent_group, ssid ? ssid->ssid : NULL, ssid ? ssid->ssid_len : 0, wpa_s->p2p_pd_before_go_neg, pref_freq, wps_method == WPS_NFC ? wpa_s->p2p_oob_dev_pw_id : 0); } static int wpas_p2p_auth_go_neg(struct wpa_supplicant *wpa_s, 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, struct wpa_ssid *ssid, unsigned int pref_freq) { if (persistent_group && wpa_s->conf->persistent_reconnect) persistent_group = 2; return p2p_authorize(wpa_s->global->p2p, peer_addr, wps_method, go_intent, own_interface_addr, force_freq, persistent_group, ssid ? ssid->ssid : NULL, ssid ? ssid->ssid_len : 0, pref_freq, wps_method == WPS_NFC ? wpa_s->p2p_oob_dev_pw_id : 0); } static void wpas_p2p_check_join_scan_limit(struct wpa_supplicant *wpa_s) { wpa_s->p2p_join_scan_count++; wpa_printf(MSG_DEBUG, "P2P: Join scan attempt %d", wpa_s->p2p_join_scan_count); if (wpa_s->p2p_join_scan_count > P2P_MAX_JOIN_SCAN_ATTEMPTS) { wpa_printf(MSG_DEBUG, "P2P: Failed to find GO " MACSTR " for join operationg - stop join attempt", MAC2STR(wpa_s->pending_join_iface_addr)); eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL); if (wpa_s->p2p_auto_pd) { wpa_s->p2p_auto_pd = 0; wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_FAILURE " p2p_dev_addr=" MACSTR " status=N/A", MAC2STR(wpa_s->pending_join_dev_addr)); return; } wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_FORMATION_FAILURE); } } static int wpas_check_freq_conflict(struct wpa_supplicant *wpa_s, int freq) { int *freqs, res, num, i; if (wpas_p2p_num_unused_channels(wpa_s) > 0) { /* Multiple channels are supported and not all are in use */ return 0; } freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int)); if (!freqs) return 1; num = wpas_p2p_valid_oper_freqs(wpa_s, freqs, wpa_s->num_multichan_concurrent); if (num < 0) { res = 1; goto exit_free; } for (i = 0; i < num; i++) { if (freqs[i] == freq) { wpa_printf(MSG_DEBUG, "P2P: Frequency %d MHz in use by another virtual interface and can be used", freq); res = 0; goto exit_free; } } res = 1; exit_free: os_free(freqs); return res; } static int wpas_p2p_peer_go(struct wpa_supplicant *wpa_s, const u8 *peer_dev_addr) { struct wpa_bss *bss; int updated; bss = wpa_bss_get_p2p_dev_addr(wpa_s, peer_dev_addr); if (bss == NULL) return -1; if (bss->last_update_idx < wpa_s->bss_update_idx) { wpa_printf(MSG_DEBUG, "P2P: Peer BSS entry not updated in the " "last scan"); return 0; } updated = os_reltime_before(&wpa_s->p2p_auto_started, &bss->last_update); wpa_printf(MSG_DEBUG, "P2P: Current BSS entry for peer updated at " "%ld.%06ld (%supdated in last scan)", bss->last_update.sec, bss->last_update.usec, updated ? "": "not "); return updated; } static void wpas_p2p_scan_res_join(struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res) { struct wpa_bss *bss = NULL; int freq; u8 iface_addr[ETH_ALEN]; eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL); if (wpa_s->global->p2p_disabled) return; wpa_printf(MSG_DEBUG, "P2P: Scan results received (%d BSS) for %sjoin", scan_res ? (int) scan_res->num : -1, wpa_s->p2p_auto_join ? "auto_" : ""); if (scan_res) wpas_p2p_scan_res_handler(wpa_s, scan_res); if (wpa_s->p2p_auto_pd) { int join = wpas_p2p_peer_go(wpa_s, wpa_s->pending_join_dev_addr); if (join == 0 && wpa_s->auto_pd_scan_retry < P2P_AUTO_PD_SCAN_ATTEMPTS) { wpa_s->auto_pd_scan_retry++; bss = wpa_bss_get_bssid_latest( wpa_s, wpa_s->pending_join_dev_addr); if (bss) { freq = bss->freq; wpa_printf(MSG_DEBUG, "P2P: Scan retry %d for " "the peer " MACSTR " at %d MHz", wpa_s->auto_pd_scan_retry, MAC2STR(wpa_s-> pending_join_dev_addr), freq); wpas_p2p_join_scan_req(wpa_s, freq, NULL, 0); return; } } if (join < 0) join = 0; wpa_s->p2p_auto_pd = 0; wpa_s->pending_pd_use = join ? AUTO_PD_JOIN : AUTO_PD_GO_NEG; wpa_printf(MSG_DEBUG, "P2P: Auto PD with " MACSTR " join=%d", MAC2STR(wpa_s->pending_join_dev_addr), join); if (p2p_prov_disc_req(wpa_s->global->p2p, wpa_s->pending_join_dev_addr, wpa_s->pending_pd_config_methods, join, 0, wpa_s->user_initiated_pd) < 0) { wpa_s->p2p_auto_pd = 0; wpa_msg_global(wpa_s, MSG_INFO, P2P_EVENT_PROV_DISC_FAILURE " p2p_dev_addr=" MACSTR " status=N/A", MAC2STR(wpa_s->pending_join_dev_addr)); } return; } if (wpa_s->p2p_auto_join) { int join = wpas_p2p_peer_go(wpa_s, wpa_s->pending_join_dev_addr); if (join < 0) { wpa_printf(MSG_DEBUG, "P2P: Peer was not found to be " "running a GO -> use GO Negotiation"); wpas_p2p_connect(wpa_s, wpa_s->pending_join_dev_addr, wpa_s->p2p_pin, wpa_s->p2p_wps_method, wpa_s->p2p_persistent_group, 0, 0, 0, wpa_s->p2p_go_intent, wpa_s->p2p_connect_freq, wpa_s->p2p_persistent_id, wpa_s->p2p_pd_before_go_neg, wpa_s->p2p_go_ht40, wpa_s->p2p_go_vht); return; } wpa_printf(MSG_DEBUG, "P2P: Peer was found running GO%s -> " "try to join the group", join ? "" : " in older scan"); if (!join) wpa_s->p2p_fallback_to_go_neg = 1; } freq = p2p_get_oper_freq(wpa_s->global->p2p, wpa_s->pending_join_iface_addr); if (freq < 0 && p2p_get_interface_addr(wpa_s->global->p2p, wpa_s->pending_join_dev_addr, iface_addr) == 0 && os_memcmp(iface_addr, wpa_s->pending_join_dev_addr, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "P2P: Overwrite pending interface " "address for join from " MACSTR " to " MACSTR " based on newly discovered P2P peer entry", MAC2STR(wpa_s->pending_join_iface_addr), MAC2STR(iface_addr)); os_memcpy(wpa_s->pending_join_iface_addr, iface_addr, ETH_ALEN); freq = p2p_get_oper_freq(wpa_s->global->p2p, wpa_s->pending_join_iface_addr); } if (freq >= 0) { wpa_printf(MSG_DEBUG, "P2P: Target GO operating frequency " "from P2P peer table: %d MHz", freq); } if (wpa_s->p2p_join_ssid_len) { wpa_printf(MSG_DEBUG, "P2P: Trying to find target GO BSS entry based on BSSID " MACSTR " and SSID %s", MAC2STR(wpa_s->pending_join_iface_addr), wpa_ssid_txt(wpa_s->p2p_join_ssid, wpa_s->p2p_join_ssid_len)); bss = wpa_bss_get(wpa_s, wpa_s->pending_join_iface_addr, wpa_s->p2p_join_ssid, wpa_s->p2p_join_ssid_len); } if (!bss) { wpa_printf(MSG_DEBUG, "P2P: Trying to find target GO BSS entry based on BSSID " MACSTR, MAC2STR(wpa_s->pending_join_iface_addr)); bss = wpa_bss_get_bssid_latest(wpa_s, wpa_s->pending_join_iface_addr); } if (bss) { freq = bss->freq; wpa_printf(MSG_DEBUG, "P2P: Target GO operating frequency " "from BSS table: %d MHz (SSID %s)", freq, wpa_ssid_txt(bss->ssid, bss->ssid_len)); } if (freq > 0) { u16 method; if (wpas_check_freq_conflict(wpa_s, freq) > 0) { wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_FORMATION_FAILURE "reason=FREQ_CONFLICT"); return; } wpa_printf(MSG_DEBUG, "P2P: Send Provision Discovery Request " "prior to joining an existing group (GO " MACSTR " freq=%u MHz)", MAC2STR(wpa_s->pending_join_dev_addr), freq); wpa_s->pending_pd_before_join = 1; switch (wpa_s->pending_join_wps_method) { case WPS_PIN_DISPLAY: method = WPS_CONFIG_KEYPAD; break; case WPS_PIN_KEYPAD: method = WPS_CONFIG_DISPLAY; break; case WPS_PBC: method = WPS_CONFIG_PUSHBUTTON; break; default: method = 0; break; } if ((p2p_get_provisioning_info(wpa_s->global->p2p, wpa_s->pending_join_dev_addr) == method)) { /* * We have already performed provision discovery for * joining the group. Proceed directly to join * operation without duplicated provision discovery. */ wpa_printf(MSG_DEBUG, "P2P: Provision discovery " "with " MACSTR " already done - proceed to " "join", MAC2STR(wpa_s->pending_join_dev_addr)); wpa_s->pending_pd_before_join = 0; goto start; } if (p2p_prov_disc_req(wpa_s->global->p2p, wpa_s->pending_join_dev_addr, method, 1, freq, wpa_s->user_initiated_pd) < 0) { wpa_printf(MSG_DEBUG, "P2P: Failed to send Provision " "Discovery Request before joining an " "existing group"); wpa_s->pending_pd_before_join = 0; goto start; } return; } wpa_printf(MSG_DEBUG, "P2P: Failed to find BSS/GO - try again later"); eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL); eloop_register_timeout(1, 0, wpas_p2p_join_scan, wpa_s, NULL); wpas_p2p_check_join_scan_limit(wpa_s); return; start: /* Start join operation immediately */ wpas_p2p_join_start(wpa_s, 0, NULL, 0); } static void wpas_p2p_join_scan_req(struct wpa_supplicant *wpa_s, int freq, const u8 *ssid, size_t ssid_len) { int ret; struct wpa_driver_scan_params params; struct wpabuf *wps_ie, *ies; size_t ielen; int freqs[2] = { 0, 0 }; os_memset(¶ms, 0, sizeof(params)); /* P2P Wildcard SSID */ params.num_ssids = 1; if (ssid && ssid_len) { params.ssids[0].ssid = ssid; params.ssids[0].ssid_len = ssid_len; os_memcpy(wpa_s->p2p_join_ssid, ssid, ssid_len); wpa_s->p2p_join_ssid_len = ssid_len; } else { params.ssids[0].ssid = (u8 *) P2P_WILDCARD_SSID; params.ssids[0].ssid_len = P2P_WILDCARD_SSID_LEN; wpa_s->p2p_join_ssid_len = 0; } wpa_s->wps->dev.p2p = 1; wps_ie = wps_build_probe_req_ie(DEV_PW_DEFAULT, &wpa_s->wps->dev, wpa_s->wps->uuid, WPS_REQ_ENROLLEE, 0, NULL); if (wps_ie == NULL) { wpas_p2p_scan_res_join(wpa_s, NULL); return; } ielen = p2p_scan_ie_buf_len(wpa_s->global->p2p); ies = wpabuf_alloc(wpabuf_len(wps_ie) + ielen); if (ies == NULL) { wpabuf_free(wps_ie); wpas_p2p_scan_res_join(wpa_s, NULL); return; } wpabuf_put_buf(ies, wps_ie); wpabuf_free(wps_ie); p2p_scan_ie(wpa_s->global->p2p, ies, NULL); params.p2p_probe = 1; params.extra_ies = wpabuf_head(ies); params.extra_ies_len = wpabuf_len(ies); if (!freq) { int oper_freq; /* * If freq is not provided, check the operating freq of the GO * and use a single channel scan on if possible. */ oper_freq = p2p_get_oper_freq(wpa_s->global->p2p, wpa_s->pending_join_iface_addr); if (oper_freq > 0) freq = oper_freq; } if (freq > 0) { freqs[0] = freq; params.freqs = freqs; } /* * Run a scan to update BSS table and start Provision Discovery once * the new scan results become available. */ ret = wpa_drv_scan(wpa_s, ¶ms); if (!ret) { os_get_reltime(&wpa_s->scan_trigger_time); wpa_s->scan_res_handler = wpas_p2p_scan_res_join; wpa_s->own_scan_requested = 1; } wpabuf_free(ies); if (ret) { wpa_printf(MSG_DEBUG, "P2P: Failed to start scan for join - " "try again later"); eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL); eloop_register_timeout(1, 0, wpas_p2p_join_scan, wpa_s, NULL); wpas_p2p_check_join_scan_limit(wpa_s); } } static void wpas_p2p_join_scan(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; wpas_p2p_join_scan_req(wpa_s, 0, NULL, 0); } static int wpas_p2p_join(struct wpa_supplicant *wpa_s, const u8 *iface_addr, const u8 *dev_addr, enum p2p_wps_method wps_method, int auto_join, int op_freq, const u8 *ssid, size_t ssid_len) { wpa_printf(MSG_DEBUG, "P2P: Request to join existing group (iface " MACSTR " dev " MACSTR " op_freq=%d)%s", MAC2STR(iface_addr), MAC2STR(dev_addr), op_freq, auto_join ? " (auto_join)" : ""); if (ssid && ssid_len) { wpa_printf(MSG_DEBUG, "P2P: Group SSID specified: %s", wpa_ssid_txt(ssid, ssid_len)); } wpa_s->p2p_auto_pd = 0; wpa_s->p2p_auto_join = !!auto_join; os_memcpy(wpa_s->pending_join_iface_addr, iface_addr, ETH_ALEN); os_memcpy(wpa_s->pending_join_dev_addr, dev_addr, ETH_ALEN); wpa_s->pending_join_wps_method = wps_method; /* Make sure we are not running find during connection establishment */ wpas_p2p_stop_find(wpa_s); wpa_s->p2p_join_scan_count = 0; wpas_p2p_join_scan_req(wpa_s, op_freq, ssid, ssid_len); return 0; } static int wpas_p2p_join_start(struct wpa_supplicant *wpa_s, int freq, const u8 *ssid, size_t ssid_len) { struct wpa_supplicant *group; struct p2p_go_neg_results res; struct wpa_bss *bss; group = wpas_p2p_get_group_iface(wpa_s, 0, 0); if (group == NULL) return -1; if (group != wpa_s) { os_memcpy(group->p2p_pin, wpa_s->p2p_pin, sizeof(group->p2p_pin)); group->p2p_wps_method = wpa_s->p2p_wps_method; } else { /* * Need to mark the current interface for p2p_group_formation * when a separate group interface is not used. This is needed * to allow p2p_cancel stop a pending p2p_connect-join. * wpas_p2p_init_group_interface() addresses this for the case * where a separate group interface is used. */ wpa_s->global->p2p_group_formation = wpa_s; } group->p2p_in_provisioning = 1; group->p2p_fallback_to_go_neg = wpa_s->p2p_fallback_to_go_neg; os_memset(&res, 0, sizeof(res)); os_memcpy(res.peer_device_addr, wpa_s->pending_join_dev_addr, ETH_ALEN); os_memcpy(res.peer_interface_addr, wpa_s->pending_join_iface_addr, ETH_ALEN); res.wps_method = wpa_s->pending_join_wps_method; if (freq && ssid && ssid_len) { res.freq = freq; res.ssid_len = ssid_len; os_memcpy(res.ssid, ssid, ssid_len); } else { bss = wpa_bss_get_bssid_latest(wpa_s, wpa_s->pending_join_iface_addr); if (bss) { res.freq = bss->freq; res.ssid_len = bss->ssid_len; os_memcpy(res.ssid, bss->ssid, bss->ssid_len); wpa_printf(MSG_DEBUG, "P2P: Join target GO operating frequency from BSS table: %d MHz (SSID %s)", bss->freq, wpa_ssid_txt(bss->ssid, bss->ssid_len)); } } if (wpa_s->off_channel_freq || wpa_s->roc_waiting_drv_freq) { wpa_printf(MSG_DEBUG, "P2P: Cancel remain-on-channel prior to " "starting client"); wpa_drv_cancel_remain_on_channel(wpa_s); wpa_s->off_channel_freq = 0; wpa_s->roc_waiting_drv_freq = 0; } wpas_start_wps_enrollee(group, &res); /* * Allow a longer timeout for join-a-running-group than normal 15 * second group formation timeout since the GO may not have authorized * our connection yet. */ eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s, NULL); eloop_register_timeout(60, 0, wpas_p2p_group_formation_timeout, wpa_s, NULL); return 0; } static int wpas_p2p_setup_freqs(struct wpa_supplicant *wpa_s, int freq, int *force_freq, int *pref_freq, int go) { int *freqs, res; unsigned int freq_in_use = 0, num, i; freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int)); if (!freqs) return -1; num = get_shared_radio_freqs(wpa_s, freqs, wpa_s->num_multichan_concurrent); wpa_printf(MSG_DEBUG, "P2P: Setup freqs: freq=%d num_MCC=%d shared_freqs=%u", freq, wpa_s->num_multichan_concurrent, num); if (freq > 0) { int ret; if (go) ret = p2p_supported_freq(wpa_s->global->p2p, freq); else ret = p2p_supported_freq_cli(wpa_s->global->p2p, freq); if (!ret) { wpa_printf(MSG_DEBUG, "P2P: The forced channel " "(%u MHz) is not supported for P2P uses", freq); res = -3; goto exit_free; } for (i = 0; i < num; i++) { if (freqs[i] == freq) freq_in_use = 1; } if (num == wpa_s->num_multichan_concurrent && !freq_in_use) { wpa_printf(MSG_DEBUG, "P2P: Cannot start P2P group on %u MHz as there are no available channels", freq); res = -2; goto exit_free; } wpa_printf(MSG_DEBUG, "P2P: Trying to force us to use the " "requested channel (%u MHz)", freq); *force_freq = freq; goto exit_ok; } for (i = 0; i < num; i++) { if (!p2p_supported_freq(wpa_s->global->p2p, freqs[i])) continue; if (*pref_freq == 0 && num < wpa_s->num_multichan_concurrent) { wpa_printf(MSG_DEBUG, "P2P: Try to prefer a frequency (%u MHz) we are already using", freqs[i]); *pref_freq = freqs[i]; } else { wpa_printf(MSG_DEBUG, "P2P: Try to force us to use frequency (%u MHz) which is already in use", freqs[i]); *force_freq = freqs[i]; } break; } if (i == num) { if (num < wpa_s->num_multichan_concurrent && num > 0) { wpa_printf(MSG_DEBUG, "P2P: Current operating channels are not available for P2P. Try to use another channel"); *force_freq = 0; } else if (num < wpa_s->num_multichan_concurrent) { wpa_printf(MSG_DEBUG, "P2P: No current operating channels - try to use a new channel"); *force_freq = 0; } else { wpa_printf(MSG_DEBUG, "P2P: All channels are in use and none of them are P2P enabled. Cannot start P2P group"); res = -2; goto exit_free; } } exit_ok: res = 0; exit_free: os_free(freqs); return res; } /** * wpas_p2p_connect - Request P2P Group Formation to be started * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * @peer_addr: Address of the peer P2P Device * @pin: PIN to use during provisioning or %NULL to indicate PBC mode * @persistent_group: Whether to create a persistent group * @auto_join: Whether to select join vs. GO Negotiation automatically * @join: Whether to join an existing group (as a client) instead of starting * Group Owner negotiation; @peer_addr is BSSID in that case * @auth: Whether to only authorize the connection instead of doing that and * initiating Group Owner negotiation * @go_intent: GO Intent or -1 to use default * @freq: Frequency for the group or 0 for auto-selection * @persistent_id: Persistent group credentials to use for forcing GO * parameters or -1 to generate new values (SSID/passphrase) * @pd: Whether to send Provision Discovery prior to GO Negotiation as an * interoperability workaround when initiating group formation * @ht40: Start GO with 40 MHz channel width * @vht: Start GO with VHT support * Returns: 0 or new PIN (if pin was %NULL) on success, -1 on unspecified * failure, -2 on failure due to channel not currently available, * -3 if forced channel is not supported */ int wpas_p2p_connect(struct wpa_supplicant *wpa_s, const u8 *peer_addr, const char *pin, enum p2p_wps_method wps_method, int persistent_group, int auto_join, int join, int auth, int go_intent, int freq, int persistent_id, int pd, int ht40, int vht) { int force_freq = 0, pref_freq = 0; int ret = 0, res; enum wpa_driver_if_type iftype; const u8 *if_addr; struct wpa_ssid *ssid = NULL; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; if (persistent_id >= 0) { ssid = wpa_config_get_network(wpa_s->conf, persistent_id); if (ssid == NULL || ssid->disabled != 2 || ssid->mode != WPAS_MODE_P2P_GO) return -1; } os_free(wpa_s->global->add_psk); wpa_s->global->add_psk = NULL; wpa_s->global->p2p_fail_on_wps_complete = 0; if (go_intent < 0) go_intent = wpa_s->conf->p2p_go_intent; if (!auth) wpa_s->p2p_long_listen = 0; wpa_s->p2p_wps_method = wps_method; wpa_s->p2p_persistent_group = !!persistent_group; wpa_s->p2p_persistent_id = persistent_id; wpa_s->p2p_go_intent = go_intent; wpa_s->p2p_connect_freq = freq; wpa_s->p2p_fallback_to_go_neg = 0; wpa_s->p2p_pd_before_go_neg = !!pd; wpa_s->p2p_go_ht40 = !!ht40; wpa_s->p2p_go_vht = !!vht; if (pin) os_strlcpy(wpa_s->p2p_pin, pin, sizeof(wpa_s->p2p_pin)); else if (wps_method == WPS_PIN_DISPLAY) { ret = wps_generate_pin(); os_snprintf(wpa_s->p2p_pin, sizeof(wpa_s->p2p_pin), "%08d", ret); wpa_printf(MSG_DEBUG, "P2P: Randomly generated PIN: %s", wpa_s->p2p_pin); } else wpa_s->p2p_pin[0] = '\0'; if (join || auto_join) { u8 iface_addr[ETH_ALEN], dev_addr[ETH_ALEN]; if (auth) { wpa_printf(MSG_DEBUG, "P2P: Authorize invitation to " "connect a running group from " MACSTR, MAC2STR(peer_addr)); os_memcpy(wpa_s->p2p_auth_invite, peer_addr, ETH_ALEN); return ret; } os_memcpy(dev_addr, peer_addr, ETH_ALEN); if (p2p_get_interface_addr(wpa_s->global->p2p, peer_addr, iface_addr) < 0) { os_memcpy(iface_addr, peer_addr, ETH_ALEN); p2p_get_dev_addr(wpa_s->global->p2p, peer_addr, dev_addr); } if (auto_join) { os_get_reltime(&wpa_s->p2p_auto_started); wpa_printf(MSG_DEBUG, "P2P: Auto join started at " "%ld.%06ld", wpa_s->p2p_auto_started.sec, wpa_s->p2p_auto_started.usec); } wpa_s->user_initiated_pd = 1; if (wpas_p2p_join(wpa_s, iface_addr, dev_addr, wps_method, auto_join, freq, NULL, 0) < 0) return -1; return ret; } res = wpas_p2p_setup_freqs(wpa_s, freq, &force_freq, &pref_freq, go_intent == 15); if (res) return res; wpas_p2p_set_own_freq_preference(wpa_s, force_freq ? force_freq : pref_freq); wpa_s->create_p2p_iface = wpas_p2p_create_iface(wpa_s); if (wpa_s->create_p2p_iface) { /* Prepare to add a new interface for the group */ iftype = WPA_IF_P2P_GROUP; if (go_intent == 15) iftype = WPA_IF_P2P_GO; if (wpas_p2p_add_group_interface(wpa_s, iftype) < 0) { wpa_printf(MSG_ERROR, "P2P: Failed to allocate a new " "interface for the group"); return -1; } if_addr = wpa_s->pending_interface_addr; } else if_addr = wpa_s->own_addr; if (auth) { if (wpas_p2p_auth_go_neg(wpa_s, peer_addr, wps_method, go_intent, if_addr, force_freq, persistent_group, ssid, pref_freq) < 0) return -1; return ret; } if (wpas_p2p_start_go_neg(wpa_s, peer_addr, wps_method, go_intent, if_addr, force_freq, persistent_group, ssid, pref_freq) < 0) { if (wpa_s->create_p2p_iface) wpas_p2p_remove_pending_group_interface(wpa_s); return -1; } return ret; } /** * wpas_p2p_remain_on_channel_cb - Indication of remain-on-channel start * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * @freq: Frequency of the channel in MHz * @duration: Duration of the stay on the channel in milliseconds * * This callback is called when the driver indicates that it has started the * requested remain-on-channel duration. */ void wpas_p2p_remain_on_channel_cb(struct wpa_supplicant *wpa_s, unsigned int freq, unsigned int duration) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return; if (wpa_s->off_channel_freq == wpa_s->pending_listen_freq) { p2p_listen_cb(wpa_s->global->p2p, wpa_s->pending_listen_freq, wpa_s->pending_listen_duration); wpa_s->pending_listen_freq = 0; } } static int wpas_p2p_listen_start(struct wpa_supplicant *wpa_s, unsigned int timeout) { /* Limit maximum Listen state time based on driver limitation. */ if (timeout > wpa_s->max_remain_on_chan) timeout = wpa_s->max_remain_on_chan; return p2p_listen(wpa_s->global->p2p, timeout); } /** * wpas_p2p_cancel_remain_on_channel_cb - Remain-on-channel timeout * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * @freq: Frequency of the channel in MHz * * This callback is called when the driver indicates that a remain-on-channel * operation has been completed, i.e., the duration on the requested channel * has timed out. */ void wpas_p2p_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s, unsigned int freq) { wpa_printf(MSG_DEBUG, "P2P: Cancel remain-on-channel callback " "(p2p_long_listen=%d ms pending_action_tx=%p)", wpa_s->p2p_long_listen, offchannel_pending_action_tx(wpa_s)); wpas_p2p_listen_work_done(wpa_s); if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return; if (p2p_listen_end(wpa_s->global->p2p, freq) > 0) return; /* P2P module started a new operation */ if (offchannel_pending_action_tx(wpa_s)) return; if (wpa_s->p2p_long_listen > 0) wpa_s->p2p_long_listen -= wpa_s->max_remain_on_chan; if (wpa_s->p2p_long_listen > 0) { wpa_printf(MSG_DEBUG, "P2P: Continuing long Listen state"); wpas_p2p_listen_start(wpa_s, wpa_s->p2p_long_listen); } else { /* * When listen duration is over, stop listen & update p2p_state * to IDLE. */ p2p_stop_listen(wpa_s->global->p2p); } } /** * wpas_p2p_group_remove - Remove a P2P group * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * @ifname: Network interface name of the group interface or "*" to remove all * groups * Returns: 0 on success, -1 on failure * * This function is used to remove a P2P group. This can be used to disconnect * from a group in which the local end is a P2P Client or to end a P2P Group in * case the local end is the Group Owner. If a virtual network interface was * created for this group, that interface will be removed. Otherwise, only the * configured P2P group network will be removed from the interface. */ int wpas_p2p_group_remove(struct wpa_supplicant *wpa_s, const char *ifname) { struct wpa_global *global = wpa_s->global; if (os_strcmp(ifname, "*") == 0) { struct wpa_supplicant *prev; wpa_s = global->ifaces; while (wpa_s) { prev = wpa_s; wpa_s = wpa_s->next; if (prev->p2p_group_interface != NOT_P2P_GROUP_INTERFACE || (prev->current_ssid && prev->current_ssid->p2p_group)) wpas_p2p_disconnect(prev); } return 0; } for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { if (os_strcmp(wpa_s->ifname, ifname) == 0) break; } return wpas_p2p_disconnect(wpa_s); } static int wpas_p2p_select_go_freq(struct wpa_supplicant *wpa_s, int freq) { unsigned int r; if (freq == 2) { wpa_printf(MSG_DEBUG, "P2P: Request to start GO on 2.4 GHz " "band"); if (wpa_s->best_24_freq > 0 && p2p_supported_freq_go(wpa_s->global->p2p, wpa_s->best_24_freq)) { freq = wpa_s->best_24_freq; wpa_printf(MSG_DEBUG, "P2P: Use best 2.4 GHz band " "channel: %d MHz", freq); } else { os_get_random((u8 *) &r, sizeof(r)); freq = 2412 + (r % 3) * 25; wpa_printf(MSG_DEBUG, "P2P: Use random 2.4 GHz band " "channel: %d MHz", freq); } } if (freq == 5) { wpa_printf(MSG_DEBUG, "P2P: Request to start GO on 5 GHz " "band"); if (wpa_s->best_5_freq > 0 && p2p_supported_freq_go(wpa_s->global->p2p, wpa_s->best_5_freq)) { freq = wpa_s->best_5_freq; wpa_printf(MSG_DEBUG, "P2P: Use best 5 GHz band " "channel: %d MHz", freq); } else { os_get_random((u8 *) &r, sizeof(r)); freq = 5180 + (r % 4) * 20; if (!p2p_supported_freq_go(wpa_s->global->p2p, freq)) { wpa_printf(MSG_DEBUG, "P2P: Could not select " "5 GHz channel for P2P group"); return -1; } wpa_printf(MSG_DEBUG, "P2P: Use random 5 GHz band " "channel: %d MHz", freq); } } if (freq > 0 && !p2p_supported_freq_go(wpa_s->global->p2p, freq)) { wpa_printf(MSG_DEBUG, "P2P: The forced channel for GO " "(%u MHz) is not supported for P2P uses", freq); return -1; } return freq; } static int wpas_p2p_init_go_params(struct wpa_supplicant *wpa_s, struct p2p_go_neg_results *params, int freq, int ht40, int vht, const struct p2p_channels *channels) { int res, *freqs; unsigned int pref_freq; unsigned int num, i; os_memset(params, 0, sizeof(*params)); params->role_go = 1; params->ht40 = ht40; params->vht = vht; if (freq) { if (!freq_included(channels, freq)) { wpa_printf(MSG_DEBUG, "P2P: Forced GO freq %d MHz not " "accepted", freq); return -1; } wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on forced " "frequency %d MHz", freq); params->freq = freq; } else if (wpa_s->conf->p2p_oper_reg_class == 81 && wpa_s->conf->p2p_oper_channel >= 1 && wpa_s->conf->p2p_oper_channel <= 11 && freq_included(channels, 2407 + 5 * wpa_s->conf->p2p_oper_channel)) { params->freq = 2407 + 5 * wpa_s->conf->p2p_oper_channel; wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on configured " "frequency %d MHz", params->freq); } else if ((wpa_s->conf->p2p_oper_reg_class == 115 || wpa_s->conf->p2p_oper_reg_class == 116 || wpa_s->conf->p2p_oper_reg_class == 117 || wpa_s->conf->p2p_oper_reg_class == 124 || wpa_s->conf->p2p_oper_reg_class == 126 || wpa_s->conf->p2p_oper_reg_class == 127) && freq_included(channels, 5000 + 5 * wpa_s->conf->p2p_oper_channel)) { params->freq = 5000 + 5 * wpa_s->conf->p2p_oper_channel; wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on configured " "frequency %d MHz", params->freq); } else if (wpa_s->conf->p2p_oper_channel == 0 && wpa_s->best_overall_freq > 0 && p2p_supported_freq_go(wpa_s->global->p2p, wpa_s->best_overall_freq) && freq_included(channels, wpa_s->best_overall_freq)) { params->freq = wpa_s->best_overall_freq; wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best overall " "channel %d MHz", params->freq); } else if (wpa_s->conf->p2p_oper_channel == 0 && wpa_s->best_24_freq > 0 && p2p_supported_freq_go(wpa_s->global->p2p, wpa_s->best_24_freq) && freq_included(channels, wpa_s->best_24_freq)) { params->freq = wpa_s->best_24_freq; wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best 2.4 GHz " "channel %d MHz", params->freq); } else if (wpa_s->conf->p2p_oper_channel == 0 && wpa_s->best_5_freq > 0 && p2p_supported_freq_go(wpa_s->global->p2p, wpa_s->best_5_freq) && freq_included(channels, wpa_s->best_5_freq)) { params->freq = wpa_s->best_5_freq; wpa_printf(MSG_DEBUG, "P2P: Set GO freq based on best 5 GHz " "channel %d MHz", params->freq); } else if ((pref_freq = p2p_get_pref_freq(wpa_s->global->p2p, channels))) { params->freq = pref_freq; wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz from preferred " "channels", params->freq); } else { int chan; for (chan = 0; chan < 11; chan++) { params->freq = 2412 + chan * 5; if (!wpas_p2p_disallowed_freq(wpa_s->global, params->freq) && freq_included(channels, params->freq)) break; } if (chan == 11) { wpa_printf(MSG_DEBUG, "P2P: No 2.4 GHz channel " "allowed"); return -1; } wpa_printf(MSG_DEBUG, "P2P: Set GO freq %d MHz (no preference " "known)", params->freq); } freqs = os_calloc(wpa_s->num_multichan_concurrent, sizeof(int)); if (!freqs) return -1; res = wpas_p2p_valid_oper_freqs(wpa_s, freqs, wpa_s->num_multichan_concurrent); if (res < 0) { os_free(freqs); return -1; } num = res; for (i = 0; i < num; i++) { if (freq && freqs[i] == freq) break; if (!freq && freq_included(channels, freqs[i])) { wpa_printf(MSG_DEBUG, "P2P: Force GO on a channel we are already using (%u MHz)", freqs[i]); params->freq = freqs[i]; break; } } if (i == num) { if (wpas_p2p_num_unused_channels(wpa_s) <= 0) { if (freq) wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on freq (%u MHz) as all the channels are in use", freq); else wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on any of the channels we are already using"); os_free(freqs); return -1; } else if (num == 0) { wpa_printf(MSG_DEBUG, "P2P: Use one of the free channels"); } else { wpa_printf(MSG_DEBUG, "P2P: Cannot force GO on any of the channels we are already using. Use one of the free channels"); } } os_free(freqs); return 0; } static struct wpa_supplicant * wpas_p2p_get_group_iface(struct wpa_supplicant *wpa_s, int addr_allocated, int go) { struct wpa_supplicant *group_wpa_s; if (!wpas_p2p_create_iface(wpa_s)) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use same interface for group " "operations"); wpa_s->p2p_first_connection_timeout = 0; return wpa_s; } if (wpas_p2p_add_group_interface(wpa_s, go ? WPA_IF_P2P_GO : WPA_IF_P2P_CLIENT) < 0) { wpa_msg_global(wpa_s, MSG_ERROR, "P2P: Failed to add group interface"); return NULL; } group_wpa_s = wpas_p2p_init_group_interface(wpa_s, go); if (group_wpa_s == NULL) { wpa_msg_global(wpa_s, MSG_ERROR, "P2P: Failed to initialize group interface"); wpas_p2p_remove_pending_group_interface(wpa_s); return NULL; } wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use separate group interface %s", group_wpa_s->ifname); group_wpa_s->p2p_first_connection_timeout = 0; return group_wpa_s; } /** * wpas_p2p_group_add - Add a new P2P group with local end as Group Owner * @wpa_s: Pointer to wpa_supplicant data from wpa_supplicant_add_iface() * @persistent_group: Whether to create a persistent group * @freq: Frequency for the group or 0 to indicate no hardcoding * @ht40: Start GO with 40 MHz channel width * @vht: Start GO with VHT support * Returns: 0 on success, -1 on failure * * This function creates a new P2P group with the local end as the Group Owner, * i.e., without using Group Owner Negotiation. */ int wpas_p2p_group_add(struct wpa_supplicant *wpa_s, int persistent_group, int freq, int ht40, int vht) { struct p2p_go_neg_results params; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; os_free(wpa_s->global->add_psk); wpa_s->global->add_psk = NULL; /* Make sure we are not running find during connection establishment */ wpa_printf(MSG_DEBUG, "P2P: Stop any on-going P2P FIND"); wpas_p2p_stop_find_oper(wpa_s); freq = wpas_p2p_select_go_freq(wpa_s, freq); if (freq < 0) return -1; if (wpas_p2p_init_go_params(wpa_s, ¶ms, freq, ht40, vht, NULL)) return -1; if (params.freq && !p2p_supported_freq_go(wpa_s->global->p2p, params.freq)) { wpa_printf(MSG_DEBUG, "P2P: The selected channel for GO " "(%u MHz) is not supported for P2P uses", params.freq); return -1; } p2p_go_params(wpa_s->global->p2p, ¶ms); params.persistent_group = persistent_group; wpa_s = wpas_p2p_get_group_iface(wpa_s, 0, 1); if (wpa_s == NULL) return -1; wpas_start_wps_go(wpa_s, ¶ms, 0); return 0; } static int wpas_start_p2p_client(struct wpa_supplicant *wpa_s, struct wpa_ssid *params, int addr_allocated) { struct wpa_ssid *ssid; wpa_s = wpas_p2p_get_group_iface(wpa_s, addr_allocated, 0); if (wpa_s == NULL) return -1; wpa_s->p2p_last_4way_hs_fail = NULL; wpa_supplicant_ap_deinit(wpa_s); ssid = wpa_config_add_network(wpa_s->conf); if (ssid == NULL) return -1; wpa_config_set_network_defaults(ssid); ssid->temporary = 1; ssid->proto = WPA_PROTO_RSN; ssid->pairwise_cipher = WPA_CIPHER_CCMP; ssid->group_cipher = WPA_CIPHER_CCMP; ssid->key_mgmt = WPA_KEY_MGMT_PSK; ssid->ssid = os_malloc(params->ssid_len); if (ssid->ssid == NULL) { wpa_config_remove_network(wpa_s->conf, ssid->id); return -1; } os_memcpy(ssid->ssid, params->ssid, params->ssid_len); ssid->ssid_len = params->ssid_len; ssid->p2p_group = 1; ssid->export_keys = 1; if (params->psk_set) { os_memcpy(ssid->psk, params->psk, 32); ssid->psk_set = 1; } if (params->passphrase) ssid->passphrase = os_strdup(params->passphrase); wpa_s->show_group_started = 1; wpa_supplicant_select_network(wpa_s, ssid); return 0; } int wpas_p2p_group_add_persistent(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid, int addr_allocated, int freq, int ht40, int vht, const struct p2p_channels *channels, int connection_timeout) { struct p2p_go_neg_results params; int go = 0; if (ssid->disabled != 2 || ssid->ssid == NULL) return -1; if (wpas_get_p2p_group(wpa_s, ssid->ssid, ssid->ssid_len, &go) && go == (ssid->mode == WPAS_MODE_P2P_GO)) { wpa_printf(MSG_DEBUG, "P2P: Requested persistent group is " "already running"); return 0; } os_free(wpa_s->global->add_psk); wpa_s->global->add_psk = NULL; /* Make sure we are not running find during connection establishment */ wpas_p2p_stop_find_oper(wpa_s); wpa_s->p2p_fallback_to_go_neg = 0; if (ssid->mode == WPAS_MODE_INFRA) return wpas_start_p2p_client(wpa_s, ssid, addr_allocated); if (ssid->mode != WPAS_MODE_P2P_GO) return -1; freq = wpas_p2p_select_go_freq(wpa_s, freq); if (freq < 0) return -1; if (wpas_p2p_init_go_params(wpa_s, ¶ms, freq, ht40, vht, channels)) return -1; params.role_go = 1; params.psk_set = ssid->psk_set; if (params.psk_set) os_memcpy(params.psk, ssid->psk, sizeof(params.psk)); if (ssid->passphrase) { if (os_strlen(ssid->passphrase) >= sizeof(params.passphrase)) { wpa_printf(MSG_ERROR, "P2P: Invalid passphrase in " "persistent group"); return -1; } os_strlcpy(params.passphrase, ssid->passphrase, sizeof(params.passphrase)); } os_memcpy(params.ssid, ssid->ssid, ssid->ssid_len); params.ssid_len = ssid->ssid_len; params.persistent_group = 1; wpa_s = wpas_p2p_get_group_iface(wpa_s, addr_allocated, 1); if (wpa_s == NULL) return -1; wpa_s->p2p_first_connection_timeout = connection_timeout; wpas_start_wps_go(wpa_s, ¶ms, 0); return 0; } static void wpas_p2p_ie_update(void *ctx, struct wpabuf *beacon_ies, struct wpabuf *proberesp_ies) { struct wpa_supplicant *wpa_s = ctx; if (wpa_s->ap_iface) { struct hostapd_data *hapd = wpa_s->ap_iface->bss[0]; if (!(hapd->conf->p2p & P2P_GROUP_OWNER)) { wpabuf_free(beacon_ies); wpabuf_free(proberesp_ies); return; } if (beacon_ies) { wpabuf_free(hapd->p2p_beacon_ie); hapd->p2p_beacon_ie = beacon_ies; } wpabuf_free(hapd->p2p_probe_resp_ie); hapd->p2p_probe_resp_ie = proberesp_ies; } else { wpabuf_free(beacon_ies); wpabuf_free(proberesp_ies); } wpa_supplicant_ap_update_beacon(wpa_s); } static void wpas_p2p_idle_update(void *ctx, int idle) { struct wpa_supplicant *wpa_s = ctx; if (!wpa_s->ap_iface) return; wpa_printf(MSG_DEBUG, "P2P: GO - group %sidle", idle ? "" : "not "); if (idle) { if (wpa_s->global->p2p_fail_on_wps_complete && wpa_s->p2p_in_provisioning) { wpas_p2p_grpform_fail_after_wps(wpa_s); return; } wpas_p2p_set_group_idle_timeout(wpa_s); } else eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL); } struct p2p_group * wpas_p2p_group_init(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { struct p2p_group *group; struct p2p_group_config *cfg; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return NULL; cfg = os_zalloc(sizeof(*cfg)); if (cfg == NULL) return NULL; if (ssid->p2p_persistent_group && wpa_s->conf->persistent_reconnect) cfg->persistent_group = 2; else if (ssid->p2p_persistent_group) cfg->persistent_group = 1; os_memcpy(cfg->interface_addr, wpa_s->own_addr, ETH_ALEN); if (wpa_s->max_stations && wpa_s->max_stations < wpa_s->conf->max_num_sta) cfg->max_clients = wpa_s->max_stations; else cfg->max_clients = wpa_s->conf->max_num_sta; os_memcpy(cfg->ssid, ssid->ssid, ssid->ssid_len); cfg->ssid_len = ssid->ssid_len; cfg->freq = ssid->frequency; cfg->cb_ctx = wpa_s; cfg->ie_update = wpas_p2p_ie_update; cfg->idle_update = wpas_p2p_idle_update; group = p2p_group_init(wpa_s->global->p2p, cfg); if (group == NULL) os_free(cfg); if (ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION) p2p_group_notif_formation_done(group); wpa_s->p2p_group = group; return group; } void wpas_p2p_wps_success(struct wpa_supplicant *wpa_s, const u8 *peer_addr, int registrar) { struct wpa_ssid *ssid = wpa_s->current_ssid; if (!wpa_s->p2p_in_provisioning) { wpa_printf(MSG_DEBUG, "P2P: Ignore WPS success event - P2P " "provisioning not in progress"); return; } if (ssid && ssid->mode == WPAS_MODE_INFRA) { u8 go_dev_addr[ETH_ALEN]; os_memcpy(go_dev_addr, wpa_s->bssid, ETH_ALEN); wpas_p2p_persistent_group(wpa_s, go_dev_addr, ssid->ssid, ssid->ssid_len); /* Clear any stored provisioning info */ p2p_clear_provisioning_info(wpa_s->global->p2p, go_dev_addr); } eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); wpa_s->p2p_go_group_formation_completed = 1; if (ssid && ssid->mode == WPAS_MODE_INFRA) { /* * Use a separate timeout for initial data connection to * complete to allow the group to be removed automatically if * something goes wrong in this step before the P2P group idle * timeout mechanism is taken into use. */ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Re-start group formation timeout (%d seconds) as client for initial connection", P2P_MAX_INITIAL_CONN_WAIT); eloop_register_timeout(P2P_MAX_INITIAL_CONN_WAIT, 0, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); } else if (ssid) { /* * Use a separate timeout for initial data connection to * complete to allow the group to be removed automatically if * the client does not complete data connection successfully. */ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Re-start group formation timeout (%d seconds) as GO for initial connection", P2P_MAX_INITIAL_CONN_WAIT_GO); eloop_register_timeout(P2P_MAX_INITIAL_CONN_WAIT_GO, 0, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); /* * Complete group formation on first successful data connection */ wpa_s->p2p_go_group_formation_completed = 0; } if (wpa_s->global->p2p) p2p_wps_success_cb(wpa_s->global->p2p, peer_addr); wpas_group_formation_completed(wpa_s, 1); } void wpas_p2p_wps_failed(struct wpa_supplicant *wpa_s, struct wps_event_fail *fail) { if (!wpa_s->p2p_in_provisioning) { wpa_printf(MSG_DEBUG, "P2P: Ignore WPS fail event - P2P " "provisioning not in progress"); return; } if (wpa_s->go_params) { p2p_clear_provisioning_info( wpa_s->global->p2p, wpa_s->go_params->peer_device_addr); } wpas_notify_p2p_wps_failed(wpa_s, fail); if (wpa_s == wpa_s->global->p2p_group_formation) { /* * Allow some time for the failed WPS negotiation exchange to * complete, but remove the group since group formation cannot * succeed after provisioning failure. */ wpa_printf(MSG_DEBUG, "P2P: WPS step failed during group formation - reject connection from timeout"); wpa_s->global->p2p_fail_on_wps_complete = 1; eloop_deplete_timeout(0, 50000, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); } } int wpas_p2p_wps_eapol_cb(struct wpa_supplicant *wpa_s) { if (!wpa_s->global->p2p_fail_on_wps_complete || !wpa_s->p2p_in_provisioning) return 0; wpas_p2p_grpform_fail_after_wps(wpa_s); return 1; } int wpas_p2p_prov_disc(struct wpa_supplicant *wpa_s, const u8 *peer_addr, const char *config_method, enum wpas_p2p_prov_disc_use use) { u16 config_methods; wpa_s->p2p_fallback_to_go_neg = 0; wpa_s->pending_pd_use = NORMAL_PD; if (os_strncmp(config_method, "display", 7) == 0) config_methods = WPS_CONFIG_DISPLAY; else if (os_strncmp(config_method, "keypad", 6) == 0) config_methods = WPS_CONFIG_KEYPAD; else if (os_strncmp(config_method, "pbc", 3) == 0 || os_strncmp(config_method, "pushbutton", 10) == 0) config_methods = WPS_CONFIG_PUSHBUTTON; else { wpa_printf(MSG_DEBUG, "P2P: Unknown config method"); return -1; } if (use == WPAS_P2P_PD_AUTO) { os_memcpy(wpa_s->pending_join_dev_addr, peer_addr, ETH_ALEN); wpa_s->pending_pd_config_methods = config_methods; wpa_s->p2p_auto_pd = 1; wpa_s->p2p_auto_join = 0; wpa_s->pending_pd_before_join = 0; wpa_s->auto_pd_scan_retry = 0; wpas_p2p_stop_find(wpa_s); wpa_s->p2p_join_scan_count = 0; os_get_reltime(&wpa_s->p2p_auto_started); wpa_printf(MSG_DEBUG, "P2P: Auto PD started at %ld.%06ld", wpa_s->p2p_auto_started.sec, wpa_s->p2p_auto_started.usec); wpas_p2p_join_scan(wpa_s, NULL); return 0; } if (wpa_s->global->p2p == NULL || wpa_s->global->p2p_disabled) return -1; return p2p_prov_disc_req(wpa_s->global->p2p, peer_addr, config_methods, use == WPAS_P2P_PD_FOR_JOIN, 0, 1); } int wpas_p2p_scan_result_text(const u8 *ies, size_t ies_len, char *buf, char *end) { return p2p_scan_result_text(ies, ies_len, buf, end); } static void wpas_p2p_clear_pending_action_tx(struct wpa_supplicant *wpa_s) { if (!offchannel_pending_action_tx(wpa_s)) return; wpa_printf(MSG_DEBUG, "P2P: Drop pending Action TX due to new " "operation request"); offchannel_clear_pending_action_tx(wpa_s); } int wpas_p2p_find(struct wpa_supplicant *wpa_s, 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) { wpas_p2p_clear_pending_action_tx(wpa_s); wpa_s->p2p_long_listen = 0; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL || wpa_s->p2p_in_provisioning) return -1; wpa_supplicant_cancel_sched_scan(wpa_s); return p2p_find(wpa_s->global->p2p, timeout, type, num_req_dev_types, req_dev_types, dev_id, search_delay); } static int wpas_p2p_stop_find_oper(struct wpa_supplicant *wpa_s) { wpas_p2p_clear_pending_action_tx(wpa_s); wpa_s->p2p_long_listen = 0; eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL); eloop_cancel_timeout(wpas_p2p_join_scan, wpa_s, NULL); if (wpa_s->global->p2p) p2p_stop_find(wpa_s->global->p2p); return 0; } void wpas_p2p_stop_find(struct wpa_supplicant *wpa_s) { if (wpas_p2p_stop_find_oper(wpa_s) > 0) return; wpas_p2p_remove_pending_group_interface(wpa_s); } static void wpas_p2p_long_listen_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; wpa_s->p2p_long_listen = 0; } int wpas_p2p_listen(struct wpa_supplicant *wpa_s, unsigned int timeout) { int res; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; wpa_supplicant_cancel_sched_scan(wpa_s); wpas_p2p_clear_pending_action_tx(wpa_s); if (timeout == 0) { /* * This is a request for unlimited Listen state. However, at * least for now, this is mapped to a Listen state for one * hour. */ timeout = 3600; } eloop_cancel_timeout(wpas_p2p_long_listen_timeout, wpa_s, NULL); wpa_s->p2p_long_listen = 0; /* * Stop previous find/listen operation to avoid trying to request a new * remain-on-channel operation while the driver is still running the * previous one. */ if (wpa_s->global->p2p) p2p_stop_find(wpa_s->global->p2p); res = wpas_p2p_listen_start(wpa_s, timeout * 1000); if (res == 0 && timeout * 1000 > wpa_s->max_remain_on_chan) { wpa_s->p2p_long_listen = timeout * 1000; eloop_register_timeout(timeout, 0, wpas_p2p_long_listen_timeout, wpa_s, NULL); } return res; } int wpas_p2p_assoc_req_ie(struct wpa_supplicant *wpa_s, struct wpa_bss *bss, u8 *buf, size_t len, int p2p_group) { struct wpabuf *p2p_ie; int ret; if (wpa_s->global->p2p_disabled) return -1; if (wpa_s->global->p2p == NULL) return -1; if (bss == NULL) return -1; p2p_ie = wpa_bss_get_vendor_ie_multi(bss, P2P_IE_VENDOR_TYPE); ret = p2p_assoc_req_ie(wpa_s->global->p2p, bss->bssid, buf, len, p2p_group, p2p_ie); wpabuf_free(p2p_ie); return ret; } int wpas_p2p_probe_req_rx(struct wpa_supplicant *wpa_s, const u8 *addr, const u8 *dst, const u8 *bssid, const u8 *ie, size_t ie_len, int ssi_signal) { if (wpa_s->global->p2p_disabled) return 0; if (wpa_s->global->p2p == NULL) return 0; switch (p2p_probe_req_rx(wpa_s->global->p2p, addr, dst, bssid, ie, ie_len)) { case P2P_PREQ_NOT_P2P: wpas_notify_preq(wpa_s, addr, dst, bssid, ie, ie_len, ssi_signal); /* fall through */ case P2P_PREQ_MALFORMED: case P2P_PREQ_NOT_LISTEN: case P2P_PREQ_NOT_PROCESSED: default: /* make gcc happy */ return 0; case P2P_PREQ_PROCESSED: return 1; } } void wpas_p2p_rx_action(struct wpa_supplicant *wpa_s, const u8 *da, const u8 *sa, const u8 *bssid, u8 category, const u8 *data, size_t len, int freq) { if (wpa_s->global->p2p_disabled) return; if (wpa_s->global->p2p == NULL) return; p2p_rx_action(wpa_s->global->p2p, da, sa, bssid, category, data, len, freq); } void wpas_p2p_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ies) { if (wpa_s->global->p2p_disabled) return; if (wpa_s->global->p2p == NULL) return; p2p_scan_ie(wpa_s->global->p2p, ies, NULL); } void wpas_p2p_group_deinit(struct wpa_supplicant *wpa_s) { p2p_group_deinit(wpa_s->p2p_group); wpa_s->p2p_group = NULL; wpa_s->ap_configured_cb = NULL; wpa_s->ap_configured_cb_ctx = NULL; wpa_s->ap_configured_cb_data = NULL; wpa_s->connect_without_scan = NULL; } int wpas_p2p_reject(struct wpa_supplicant *wpa_s, const u8 *addr) { wpa_s->p2p_long_listen = 0; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; return p2p_reject(wpa_s->global->p2p, addr); } /* Invite to reinvoke a persistent group */ int wpas_p2p_invite(struct wpa_supplicant *wpa_s, const u8 *peer_addr, struct wpa_ssid *ssid, const u8 *go_dev_addr, int freq, int ht40, int vht, int pref_freq) { enum p2p_invite_role role; u8 *bssid = NULL; int force_freq = 0; int res; int no_pref_freq_given = pref_freq == 0; wpa_s->global->p2p_invite_group = NULL; if (peer_addr) os_memcpy(wpa_s->p2p_auth_invite, peer_addr, ETH_ALEN); else os_memset(wpa_s->p2p_auth_invite, 0, ETH_ALEN); wpa_s->p2p_persistent_go_freq = freq; wpa_s->p2p_go_ht40 = !!ht40; if (ssid->mode == WPAS_MODE_P2P_GO) { role = P2P_INVITE_ROLE_GO; if (peer_addr == NULL) { wpa_printf(MSG_DEBUG, "P2P: Missing peer " "address in invitation command"); return -1; } if (wpas_p2p_create_iface(wpa_s)) { if (wpas_p2p_add_group_interface(wpa_s, WPA_IF_P2P_GO) < 0) { wpa_printf(MSG_ERROR, "P2P: Failed to " "allocate a new interface for the " "group"); return -1; } bssid = wpa_s->pending_interface_addr; } else bssid = wpa_s->own_addr; } else { role = P2P_INVITE_ROLE_CLIENT; peer_addr = ssid->bssid; } wpa_s->pending_invite_ssid_id = ssid->id; res = wpas_p2p_setup_freqs(wpa_s, freq, &force_freq, &pref_freq, role == P2P_INVITE_ROLE_GO); if (res) return res; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; if (wpa_s->parent->conf->p2p_ignore_shared_freq && no_pref_freq_given && pref_freq > 0 && wpa_s->num_multichan_concurrent > 1 && wpas_p2p_num_unused_channels(wpa_s) > 0) { wpa_printf(MSG_DEBUG, "P2P: Ignore own channel preference %d MHz for invitation due to p2p_ignore_shared_freq=1 configuration", pref_freq); pref_freq = 0; } return p2p_invite(wpa_s->global->p2p, peer_addr, role, bssid, ssid->ssid, ssid->ssid_len, force_freq, go_dev_addr, 1, pref_freq, -1); } /* Invite to join an active group */ int wpas_p2p_invite_group(struct wpa_supplicant *wpa_s, const char *ifname, const u8 *peer_addr, const u8 *go_dev_addr) { struct wpa_global *global = wpa_s->global; enum p2p_invite_role role; u8 *bssid = NULL; struct wpa_ssid *ssid; int persistent; int freq = 0, force_freq = 0, pref_freq = 0; int res; wpa_s->p2p_persistent_go_freq = 0; wpa_s->p2p_go_ht40 = 0; wpa_s->p2p_go_vht = 0; for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { if (os_strcmp(wpa_s->ifname, ifname) == 0) break; } if (wpa_s == NULL) { wpa_printf(MSG_DEBUG, "P2P: Interface '%s' not found", ifname); return -1; } ssid = wpa_s->current_ssid; if (ssid == NULL) { wpa_printf(MSG_DEBUG, "P2P: No current SSID to use for " "invitation"); return -1; } wpa_s->global->p2p_invite_group = wpa_s; persistent = ssid->p2p_persistent_group && wpas_p2p_get_persistent(wpa_s->parent, peer_addr, ssid->ssid, ssid->ssid_len); if (ssid->mode == WPAS_MODE_P2P_GO) { role = P2P_INVITE_ROLE_ACTIVE_GO; bssid = wpa_s->own_addr; if (go_dev_addr == NULL) go_dev_addr = wpa_s->global->p2p_dev_addr; freq = ssid->frequency; } else { role = P2P_INVITE_ROLE_CLIENT; if (wpa_s->wpa_state < WPA_ASSOCIATED) { wpa_printf(MSG_DEBUG, "P2P: Not associated - cannot " "invite to current group"); return -1; } bssid = wpa_s->bssid; if (go_dev_addr == NULL && !is_zero_ether_addr(wpa_s->go_dev_addr)) go_dev_addr = wpa_s->go_dev_addr; freq = wpa_s->current_bss ? wpa_s->current_bss->freq : (int) wpa_s->assoc_freq; } wpa_s->parent->pending_invite_ssid_id = -1; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; res = wpas_p2p_setup_freqs(wpa_s, freq, &force_freq, &pref_freq, role == P2P_INVITE_ROLE_ACTIVE_GO); if (res) return res; wpas_p2p_set_own_freq_preference(wpa_s, force_freq); return p2p_invite(wpa_s->global->p2p, peer_addr, role, bssid, ssid->ssid, ssid->ssid_len, force_freq, go_dev_addr, persistent, pref_freq, -1); } void wpas_p2p_completed(struct wpa_supplicant *wpa_s) { struct wpa_ssid *ssid = wpa_s->current_ssid; const char *ssid_txt; u8 go_dev_addr[ETH_ALEN]; int network_id = -1; int persistent; int freq; u8 ip[3 * 4]; char ip_addr[100]; if (ssid == NULL || ssid->mode != WPAS_MODE_P2P_GROUP_FORMATION) { eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); } if (!wpa_s->show_group_started || !ssid) return; wpa_s->show_group_started = 0; ssid_txt = wpa_ssid_txt(ssid->ssid, ssid->ssid_len); os_memset(go_dev_addr, 0, ETH_ALEN); if (ssid->bssid_set) os_memcpy(go_dev_addr, ssid->bssid, ETH_ALEN); persistent = wpas_p2p_persistent_group(wpa_s, go_dev_addr, ssid->ssid, ssid->ssid_len); os_memcpy(wpa_s->go_dev_addr, go_dev_addr, ETH_ALEN); if (wpa_s->global->p2p_group_formation == wpa_s) wpa_s->global->p2p_group_formation = NULL; freq = wpa_s->current_bss ? wpa_s->current_bss->freq : (int) wpa_s->assoc_freq; ip_addr[0] = '\0'; if (wpa_sm_get_p2p_ip_addr(wpa_s->wpa, ip) == 0) { os_snprintf(ip_addr, sizeof(ip_addr), " ip_addr=%u.%u.%u.%u " "ip_mask=%u.%u.%u.%u go_ip_addr=%u.%u.%u.%u", ip[0], ip[1], ip[2], ip[3], ip[4], ip[5], ip[6], ip[7], ip[8], ip[9], ip[10], ip[11]); } if (ssid->passphrase == NULL && ssid->psk_set) { char psk[65]; wpa_snprintf_hex(psk, sizeof(psk), ssid->psk, 32); wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED "%s client ssid=\"%s\" freq=%d psk=%s " "go_dev_addr=" MACSTR "%s%s", wpa_s->ifname, ssid_txt, freq, psk, MAC2STR(go_dev_addr), persistent ? " [PERSISTENT]" : "", ip_addr); } else { wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_GROUP_STARTED "%s client ssid=\"%s\" freq=%d " "passphrase=\"%s\" go_dev_addr=" MACSTR "%s%s", wpa_s->ifname, ssid_txt, freq, ssid->passphrase ? ssid->passphrase : "", MAC2STR(go_dev_addr), persistent ? " [PERSISTENT]" : "", ip_addr); } if (persistent) network_id = wpas_p2p_store_persistent_group(wpa_s->parent, ssid, go_dev_addr); if (network_id < 0) network_id = ssid->id; wpas_notify_p2p_group_started(wpa_s, ssid, network_id, 1); } int wpas_p2p_presence_req(struct wpa_supplicant *wpa_s, u32 duration1, u32 interval1, u32 duration2, u32 interval2) { int ret; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; if (wpa_s->wpa_state < WPA_ASSOCIATED || wpa_s->current_ssid == NULL || wpa_s->current_ssid->mode != WPAS_MODE_INFRA) return -1; ret = p2p_presence_req(wpa_s->global->p2p, wpa_s->bssid, wpa_s->own_addr, wpa_s->assoc_freq, duration1, interval1, duration2, interval2); if (ret == 0) wpa_s->waiting_presence_resp = 1; return ret; } int wpas_p2p_ext_listen(struct wpa_supplicant *wpa_s, unsigned int period, unsigned int interval) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; return p2p_ext_listen(wpa_s->global->p2p, period, interval); } static int wpas_p2p_is_client(struct wpa_supplicant *wpa_s) { if (wpa_s->current_ssid == NULL) { /* * current_ssid can be cleared when P2P client interface gets * disconnected, so assume this interface was used as P2P * client. */ return 1; } return wpa_s->current_ssid->p2p_group && wpa_s->current_ssid->mode == WPAS_MODE_INFRA; } static void wpas_p2p_group_idle_timeout(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; if (wpa_s->conf->p2p_group_idle == 0 && !wpas_p2p_is_client(wpa_s)) { wpa_printf(MSG_DEBUG, "P2P: Ignore group idle timeout - " "disabled"); return; } wpa_printf(MSG_DEBUG, "P2P: Group idle timeout reached - terminate " "group"); wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_IDLE_TIMEOUT); } static void wpas_p2p_set_group_idle_timeout(struct wpa_supplicant *wpa_s) { int timeout; if (eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0) wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout"); if (wpa_s->current_ssid == NULL || !wpa_s->current_ssid->p2p_group) return; timeout = wpa_s->conf->p2p_group_idle; if (wpa_s->current_ssid->mode == WPAS_MODE_INFRA && (timeout == 0 || timeout > P2P_MAX_CLIENT_IDLE)) timeout = P2P_MAX_CLIENT_IDLE; if (timeout == 0) return; if (timeout < 0) { if (wpa_s->current_ssid->mode == WPAS_MODE_INFRA) timeout = 0; /* special client mode no-timeout */ else return; } if (wpa_s->p2p_in_provisioning) { /* * Use the normal group formation timeout during the * provisioning phase to avoid terminating this process too * early due to group idle timeout. */ wpa_printf(MSG_DEBUG, "P2P: Do not use P2P group idle timeout " "during provisioning"); return; } if (wpa_s->show_group_started) { /* * Use the normal group formation timeout between the end of * the provisioning phase and completion of 4-way handshake to * avoid terminating this process too early due to group idle * timeout. */ wpa_printf(MSG_DEBUG, "P2P: Do not use P2P group idle timeout " "while waiting for initial 4-way handshake to " "complete"); return; } wpa_printf(MSG_DEBUG, "P2P: Set P2P group idle timeout to %u seconds", timeout); eloop_register_timeout(timeout, 0, wpas_p2p_group_idle_timeout, wpa_s, NULL); } /* Returns 1 if the interface was removed */ int wpas_p2p_deauth_notif(struct wpa_supplicant *wpa_s, const u8 *bssid, u16 reason_code, const u8 *ie, size_t ie_len, int locally_generated) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return 0; if (!locally_generated) p2p_deauth_notif(wpa_s->global->p2p, bssid, reason_code, ie, ie_len); if (reason_code == WLAN_REASON_DEAUTH_LEAVING && !locally_generated && wpa_s->current_ssid && wpa_s->current_ssid->p2p_group && wpa_s->current_ssid->mode == WPAS_MODE_INFRA) { wpa_printf(MSG_DEBUG, "P2P: GO indicated that the P2P Group " "session is ending"); if (wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_GO_ENDING_SESSION) > 0) return 1; } return 0; } void wpas_p2p_disassoc_notif(struct wpa_supplicant *wpa_s, const u8 *bssid, u16 reason_code, const u8 *ie, size_t ie_len, int locally_generated) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return; if (!locally_generated) p2p_disassoc_notif(wpa_s->global->p2p, bssid, reason_code, ie, ie_len); } void wpas_p2p_update_config(struct wpa_supplicant *wpa_s) { struct p2p_data *p2p = wpa_s->global->p2p; if (p2p == NULL) return; if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE)) return; if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_NAME) p2p_set_dev_name(p2p, wpa_s->conf->device_name); if (wpa_s->conf->changed_parameters & CFG_CHANGED_DEVICE_TYPE) p2p_set_pri_dev_type(p2p, wpa_s->conf->device_type); if (wpa_s->wps && (wpa_s->conf->changed_parameters & CFG_CHANGED_CONFIG_METHODS)) p2p_set_config_methods(p2p, wpa_s->wps->config_methods); if (wpa_s->wps && (wpa_s->conf->changed_parameters & CFG_CHANGED_UUID)) p2p_set_uuid(p2p, wpa_s->wps->uuid); if (wpa_s->conf->changed_parameters & CFG_CHANGED_WPS_STRING) { p2p_set_manufacturer(p2p, wpa_s->conf->manufacturer); p2p_set_model_name(p2p, wpa_s->conf->model_name); p2p_set_model_number(p2p, wpa_s->conf->model_number); p2p_set_serial_number(p2p, wpa_s->conf->serial_number); } if (wpa_s->conf->changed_parameters & CFG_CHANGED_SEC_DEVICE_TYPE) p2p_set_sec_dev_types(p2p, (void *) wpa_s->conf->sec_device_type, wpa_s->conf->num_sec_device_types); if (wpa_s->conf->changed_parameters & CFG_CHANGED_VENDOR_EXTENSION) { int i; p2p_remove_wps_vendor_extensions(p2p); for (i = 0; i < MAX_WPS_VENDOR_EXT; i++) { if (wpa_s->conf->wps_vendor_ext[i] == NULL) continue; p2p_add_wps_vendor_extension( p2p, wpa_s->conf->wps_vendor_ext[i]); } } if ((wpa_s->conf->changed_parameters & CFG_CHANGED_COUNTRY) && wpa_s->conf->country[0] && wpa_s->conf->country[1]) { char country[3]; country[0] = wpa_s->conf->country[0]; country[1] = wpa_s->conf->country[1]; country[2] = 0x04; p2p_set_country(p2p, country); } if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_SSID_POSTFIX) { p2p_set_ssid_postfix(p2p, (u8 *) wpa_s->conf->p2p_ssid_postfix, wpa_s->conf->p2p_ssid_postfix ? os_strlen(wpa_s->conf->p2p_ssid_postfix) : 0); } if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_INTRA_BSS) p2p_set_intra_bss_dist(p2p, wpa_s->conf->p2p_intra_bss); if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_LISTEN_CHANNEL) { u8 reg_class, channel; int ret; unsigned int r; if (wpa_s->conf->p2p_listen_reg_class && wpa_s->conf->p2p_listen_channel) { reg_class = wpa_s->conf->p2p_listen_reg_class; channel = wpa_s->conf->p2p_listen_channel; } else { reg_class = 81; /* * Pick one of the social channels randomly as the * listen channel. */ os_get_random((u8 *) &r, sizeof(r)); channel = 1 + (r % 3) * 5; } ret = p2p_set_listen_channel(p2p, reg_class, channel); if (ret) wpa_printf(MSG_ERROR, "P2P: Own listen channel update " "failed: %d", ret); } if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_OPER_CHANNEL) { u8 op_reg_class, op_channel, cfg_op_channel; int ret = 0; unsigned int r; if (wpa_s->conf->p2p_oper_reg_class && wpa_s->conf->p2p_oper_channel) { op_reg_class = wpa_s->conf->p2p_oper_reg_class; op_channel = wpa_s->conf->p2p_oper_channel; cfg_op_channel = 1; } else { op_reg_class = 81; /* * Use random operation channel from (1, 6, 11) *if no other preference is indicated. */ os_get_random((u8 *) &r, sizeof(r)); op_channel = 1 + (r % 3) * 5; cfg_op_channel = 0; } ret = p2p_set_oper_channel(p2p, op_reg_class, op_channel, cfg_op_channel); if (ret) wpa_printf(MSG_ERROR, "P2P: Own oper channel update " "failed: %d", ret); } if (wpa_s->conf->changed_parameters & CFG_CHANGED_P2P_PREF_CHAN) { if (p2p_set_pref_chan(p2p, wpa_s->conf->num_p2p_pref_chan, wpa_s->conf->p2p_pref_chan) < 0) { wpa_printf(MSG_ERROR, "P2P: Preferred channel list " "update failed"); } if (p2p_set_no_go_freq(p2p, &wpa_s->conf->p2p_no_go_freq) < 0) { wpa_printf(MSG_ERROR, "P2P: No GO channel list " "update failed"); } } } int wpas_p2p_set_noa(struct wpa_supplicant *wpa_s, u8 count, int start, int duration) { if (!wpa_s->ap_iface) return -1; return hostapd_p2p_set_noa(wpa_s->ap_iface->bss[0], count, start, duration); } int wpas_p2p_set_cross_connect(struct wpa_supplicant *wpa_s, int enabled) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; wpa_s->global->cross_connection = enabled; p2p_set_cross_connect(wpa_s->global->p2p, enabled); if (!enabled) { struct wpa_supplicant *iface; for (iface = wpa_s->global->ifaces; iface; iface = iface->next) { if (iface->cross_connect_enabled == 0) continue; iface->cross_connect_enabled = 0; iface->cross_connect_in_use = 0; wpa_msg_global(iface->parent, MSG_INFO, P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s", iface->ifname, iface->cross_connect_uplink); } } return 0; } static void wpas_p2p_enable_cross_connect(struct wpa_supplicant *uplink) { struct wpa_supplicant *iface; if (!uplink->global->cross_connection) return; for (iface = uplink->global->ifaces; iface; iface = iface->next) { if (!iface->cross_connect_enabled) continue; if (os_strcmp(uplink->ifname, iface->cross_connect_uplink) != 0) continue; if (iface->ap_iface == NULL) continue; if (iface->cross_connect_in_use) continue; iface->cross_connect_in_use = 1; wpa_msg_global(iface->parent, MSG_INFO, P2P_EVENT_CROSS_CONNECT_ENABLE "%s %s", iface->ifname, iface->cross_connect_uplink); } } static void wpas_p2p_disable_cross_connect(struct wpa_supplicant *uplink) { struct wpa_supplicant *iface; for (iface = uplink->global->ifaces; iface; iface = iface->next) { if (!iface->cross_connect_enabled) continue; if (os_strcmp(uplink->ifname, iface->cross_connect_uplink) != 0) continue; if (!iface->cross_connect_in_use) continue; wpa_msg_global(iface->parent, MSG_INFO, P2P_EVENT_CROSS_CONNECT_DISABLE "%s %s", iface->ifname, iface->cross_connect_uplink); iface->cross_connect_in_use = 0; } } void wpas_p2p_notif_connected(struct wpa_supplicant *wpa_s) { if (wpa_s->ap_iface || wpa_s->current_ssid == NULL || wpa_s->current_ssid->mode != WPAS_MODE_INFRA || wpa_s->cross_connect_disallowed) wpas_p2p_disable_cross_connect(wpa_s); else wpas_p2p_enable_cross_connect(wpa_s); if (!wpa_s->ap_iface && eloop_cancel_timeout(wpas_p2p_group_idle_timeout, wpa_s, NULL) > 0) wpa_printf(MSG_DEBUG, "P2P: Cancelled P2P group idle timeout"); } void wpas_p2p_notif_disconnected(struct wpa_supplicant *wpa_s) { wpas_p2p_disable_cross_connect(wpa_s); if (!wpa_s->ap_iface && !eloop_is_timeout_registered(wpas_p2p_group_idle_timeout, wpa_s, NULL)) wpas_p2p_set_group_idle_timeout(wpa_s); } static void wpas_p2p_cross_connect_setup(struct wpa_supplicant *wpa_s) { struct wpa_supplicant *iface; if (!wpa_s->global->cross_connection) return; for (iface = wpa_s->global->ifaces; iface; iface = iface->next) { if (iface == wpa_s) continue; if (iface->drv_flags & WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE) continue; if (iface->drv_flags & WPA_DRIVER_FLAGS_P2P_CAPABLE) continue; wpa_s->cross_connect_enabled = 1; os_strlcpy(wpa_s->cross_connect_uplink, iface->ifname, sizeof(wpa_s->cross_connect_uplink)); wpa_printf(MSG_DEBUG, "P2P: Enable cross connection from " "%s to %s whenever uplink is available", wpa_s->ifname, wpa_s->cross_connect_uplink); if (iface->ap_iface || iface->current_ssid == NULL || iface->current_ssid->mode != WPAS_MODE_INFRA || iface->cross_connect_disallowed || iface->wpa_state != WPA_COMPLETED) break; wpa_s->cross_connect_in_use = 1; wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_CROSS_CONNECT_ENABLE "%s %s", wpa_s->ifname, wpa_s->cross_connect_uplink); break; } } int wpas_p2p_notif_pbc_overlap(struct wpa_supplicant *wpa_s) { if (wpa_s->p2p_group_interface != P2P_GROUP_INTERFACE_CLIENT && !wpa_s->p2p_in_provisioning) return 0; /* not P2P client operation */ wpa_printf(MSG_DEBUG, "P2P: Terminate connection due to WPS PBC " "session overlap"); if (wpa_s != wpa_s->parent) wpa_msg_ctrl(wpa_s->parent, MSG_INFO, WPS_EVENT_OVERLAP); wpas_p2p_group_formation_failed(wpa_s); return 1; } void wpas_p2p_update_channel_list(struct wpa_supplicant *wpa_s) { struct p2p_channels chan, cli_chan; if (wpa_s->global == NULL || wpa_s->global->p2p == NULL) return; os_memset(&chan, 0, sizeof(chan)); os_memset(&cli_chan, 0, sizeof(cli_chan)); if (wpas_p2p_setup_channels(wpa_s, &chan, &cli_chan)) { wpa_printf(MSG_ERROR, "P2P: Failed to update supported " "channel list"); return; } p2p_update_channel_list(wpa_s->global->p2p, &chan, &cli_chan); } static void wpas_p2p_scan_res_ignore(struct wpa_supplicant *wpa_s, struct wpa_scan_results *scan_res) { wpa_printf(MSG_DEBUG, "P2P: Ignore scan results"); } int wpas_p2p_cancel(struct wpa_supplicant *wpa_s) { struct wpa_global *global = wpa_s->global; int found = 0; const u8 *peer; if (global->p2p == NULL) return -1; wpa_printf(MSG_DEBUG, "P2P: Request to cancel group formation"); if (wpa_s->pending_interface_name[0] && !is_zero_ether_addr(wpa_s->pending_interface_addr)) found = 1; peer = p2p_get_go_neg_peer(global->p2p); if (peer) { wpa_printf(MSG_DEBUG, "P2P: Unauthorize pending GO Neg peer " MACSTR, MAC2STR(peer)); p2p_unauthorize(global->p2p, peer); found = 1; } if (wpa_s->scan_res_handler == wpas_p2p_scan_res_join) { wpa_printf(MSG_DEBUG, "P2P: Stop pending scan for join"); wpa_s->scan_res_handler = wpas_p2p_scan_res_ignore; found = 1; } if (wpa_s->pending_pd_before_join) { wpa_printf(MSG_DEBUG, "P2P: Stop pending PD before join"); wpa_s->pending_pd_before_join = 0; found = 1; } wpas_p2p_stop_find(wpa_s); for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) { if (wpa_s == global->p2p_group_formation && (wpa_s->p2p_in_provisioning || wpa_s->parent->pending_interface_type == WPA_IF_P2P_CLIENT)) { wpa_printf(MSG_DEBUG, "P2P: Interface %s in group " "formation found - cancelling", wpa_s->ifname); found = 1; eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); if (wpa_s->p2p_in_provisioning) { wpas_group_formation_completed(wpa_s, 0); break; } wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_REQUESTED); break; } } if (!found) { wpa_printf(MSG_DEBUG, "P2P: No ongoing group formation found"); return -1; } return 0; } void wpas_p2p_interface_unavailable(struct wpa_supplicant *wpa_s) { if (wpa_s->current_ssid == NULL || !wpa_s->current_ssid->p2p_group) return; wpa_printf(MSG_DEBUG, "P2P: Remove group due to driver resource not " "being available anymore"); wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_UNAVAILABLE); } void wpas_p2p_update_best_channels(struct wpa_supplicant *wpa_s, int freq_24, int freq_5, int freq_overall) { struct p2p_data *p2p = wpa_s->global->p2p; if (p2p == NULL) return; p2p_set_best_channels(p2p, freq_24, freq_5, freq_overall); } int wpas_p2p_unauthorize(struct wpa_supplicant *wpa_s, const char *addr) { u8 peer[ETH_ALEN]; struct p2p_data *p2p = wpa_s->global->p2p; if (p2p == NULL) return -1; if (hwaddr_aton(addr, peer)) return -1; return p2p_unauthorize(p2p, peer); } /** * wpas_p2p_disconnect - Disconnect from a P2P Group * @wpa_s: Pointer to wpa_supplicant data * Returns: 0 on success, -1 on failure * * This can be used to disconnect from a group in which the local end is a P2P * Client or to end a P2P Group in case the local end is the Group Owner. If a * virtual network interface was created for this group, that interface will be * removed. Otherwise, only the configured P2P group network will be removed * from the interface. */ int wpas_p2p_disconnect(struct wpa_supplicant *wpa_s) { if (wpa_s == NULL) return -1; return wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_REQUESTED) < 0 ? -1 : 0; } int wpas_p2p_in_progress(struct wpa_supplicant *wpa_s) { int ret; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return 0; ret = p2p_in_progress(wpa_s->global->p2p); if (ret == 0) { /* * Check whether there is an ongoing WPS provisioning step (or * other parts of group formation) on another interface since * p2p_in_progress() does not report this to avoid issues for * scans during such provisioning step. */ if (wpa_s->global->p2p_group_formation && wpa_s->global->p2p_group_formation != wpa_s) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Another interface (%s) " "in group formation", wpa_s->global->p2p_group_formation->ifname); ret = 1; } } if (!ret && wpa_s->global->p2p_go_wait_client.sec) { struct os_reltime now; os_get_reltime(&now); if (os_reltime_expired(&now, &wpa_s->global->p2p_go_wait_client, P2P_MAX_INITIAL_CONN_WAIT_GO)) { /* Wait for the first client has expired */ wpa_s->global->p2p_go_wait_client.sec = 0; } else { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Waiting for initial client connection during group formation"); ret = 1; } } return ret; } void wpas_p2p_network_removed(struct wpa_supplicant *wpa_s, struct wpa_ssid *ssid) { if (wpa_s->p2p_in_provisioning && ssid->p2p_group && eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL) > 0) { /** * Remove the network by scheduling the group formation * timeout to happen immediately. The teardown code * needs to be scheduled to run asynch later so that we * don't delete data from under ourselves unexpectedly. * Calling wpas_p2p_group_formation_timeout directly * causes a series of crashes in WPS failure scenarios. */ wpa_printf(MSG_DEBUG, "P2P: Canceled group formation due to " "P2P group network getting removed"); eloop_register_timeout(0, 0, wpas_p2p_group_formation_timeout, wpa_s->parent, NULL); } } struct wpa_ssid * wpas_p2p_get_persistent(struct wpa_supplicant *wpa_s, const u8 *addr, const u8 *ssid, size_t ssid_len) { struct wpa_ssid *s; size_t i; for (s = wpa_s->conf->ssid; s; s = s->next) { if (s->disabled != 2) continue; if (ssid && (ssid_len != s->ssid_len || os_memcmp(ssid, s->ssid, ssid_len) != 0)) continue; if (addr == NULL) { if (s->mode == WPAS_MODE_P2P_GO) return s; continue; } if (os_memcmp(s->bssid, addr, ETH_ALEN) == 0) return s; /* peer is GO in the persistent group */ if (s->mode != WPAS_MODE_P2P_GO || s->p2p_client_list == NULL) continue; for (i = 0; i < s->num_p2p_clients; i++) { if (os_memcmp(s->p2p_client_list + i * ETH_ALEN, addr, ETH_ALEN) == 0) return s; /* peer is P2P client in persistent * group */ } } return NULL; } void wpas_p2p_notify_ap_sta_authorized(struct wpa_supplicant *wpa_s, const u8 *addr) { if (eloop_cancel_timeout(wpas_p2p_group_formation_timeout, wpa_s->parent, NULL) > 0) { /* * This can happen if WPS provisioning step is not terminated * cleanly (e.g., P2P Client does not send WSC_Done). Since the * peer was able to connect, there is no need to time out group * formation after this, though. In addition, this is used with * the initial connection wait on the GO as a separate formation * timeout and as such, expected to be hit after the initial WPS * provisioning step. */ wpa_printf(MSG_DEBUG, "P2P: Canceled P2P group formation timeout on data connection"); } if (!wpa_s->p2p_go_group_formation_completed) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Marking group formation completed on GO on first data connection"); wpa_s->p2p_go_group_formation_completed = 1; wpa_s->global->p2p_group_formation = NULL; wpa_s->p2p_in_provisioning = 0; } wpa_s->global->p2p_go_wait_client.sec = 0; if (addr == NULL) return; wpas_p2p_add_persistent_group_client(wpa_s, addr); } static void wpas_p2p_fallback_to_go_neg(struct wpa_supplicant *wpa_s, int group_added) { struct wpa_supplicant *group = wpa_s; if (wpa_s->global->p2p_group_formation) group = wpa_s->global->p2p_group_formation; wpa_s = wpa_s->parent; offchannel_send_action_done(wpa_s); if (group_added) wpas_p2p_group_delete(group, P2P_GROUP_REMOVAL_SILENT); wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Fall back to GO Negotiation"); wpas_p2p_connect(wpa_s, wpa_s->pending_join_dev_addr, wpa_s->p2p_pin, wpa_s->p2p_wps_method, wpa_s->p2p_persistent_group, 0, 0, 0, wpa_s->p2p_go_intent, wpa_s->p2p_connect_freq, wpa_s->p2p_persistent_id, wpa_s->p2p_pd_before_go_neg, wpa_s->p2p_go_ht40, wpa_s->p2p_go_vht); } int wpas_p2p_scan_no_go_seen(struct wpa_supplicant *wpa_s) { if (!wpa_s->p2p_fallback_to_go_neg || wpa_s->p2p_in_provisioning <= 5) return 0; if (wpas_p2p_peer_go(wpa_s, wpa_s->pending_join_dev_addr) > 0) return 0; /* peer operating as a GO */ wpa_dbg(wpa_s, MSG_DEBUG, "P2P: GO not found for p2p_connect-auto - " "fallback to GO Negotiation"); wpas_p2p_fallback_to_go_neg(wpa_s, 1); return 1; } unsigned int wpas_p2p_search_delay(struct wpa_supplicant *wpa_s) { struct wpa_supplicant *ifs; if (wpa_s->wpa_state > WPA_SCANNING) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use %u ms search delay due to " "concurrent operation", P2P_CONCURRENT_SEARCH_DELAY); return P2P_CONCURRENT_SEARCH_DELAY; } dl_list_for_each(ifs, &wpa_s->radio->ifaces, struct wpa_supplicant, radio_list) { if (ifs != wpa_s && ifs->wpa_state > WPA_SCANNING) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Use %u ms search " "delay due to concurrent operation on " "interface %s", P2P_CONCURRENT_SEARCH_DELAY, ifs->ifname); return P2P_CONCURRENT_SEARCH_DELAY; } } return 0; } static int wpas_p2p_remove_psk_entry(struct wpa_supplicant *wpa_s, struct wpa_ssid *s, const u8 *addr, int iface_addr) { struct psk_list_entry *psk, *tmp; int changed = 0; dl_list_for_each_safe(psk, tmp, &s->psk_list, struct psk_list_entry, list) { if ((iface_addr && !psk->p2p && os_memcmp(addr, psk->addr, ETH_ALEN) == 0) || (!iface_addr && psk->p2p && os_memcmp(addr, psk->addr, ETH_ALEN) == 0)) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove persistent group PSK list entry for " MACSTR " p2p=%u", MAC2STR(psk->addr), psk->p2p); dl_list_del(&psk->list); os_free(psk); changed++; } } return changed; } void wpas_p2p_new_psk_cb(struct wpa_supplicant *wpa_s, const u8 *mac_addr, const u8 *p2p_dev_addr, const u8 *psk, size_t psk_len) { struct wpa_ssid *ssid = wpa_s->current_ssid; struct wpa_ssid *persistent; struct psk_list_entry *p; if (psk_len != sizeof(p->psk)) return; if (p2p_dev_addr) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: New PSK for addr=" MACSTR " p2p_dev_addr=" MACSTR, MAC2STR(mac_addr), MAC2STR(p2p_dev_addr)); if (is_zero_ether_addr(p2p_dev_addr)) p2p_dev_addr = NULL; } else { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: New PSK for addr=" MACSTR, MAC2STR(mac_addr)); } if (ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: new_psk_cb during group formation"); /* To be added to persistent group once created */ if (wpa_s->global->add_psk == NULL) { wpa_s->global->add_psk = os_zalloc(sizeof(*p)); if (wpa_s->global->add_psk == NULL) return; } p = wpa_s->global->add_psk; if (p2p_dev_addr) { p->p2p = 1; os_memcpy(p->addr, p2p_dev_addr, ETH_ALEN); } else { p->p2p = 0; os_memcpy(p->addr, mac_addr, ETH_ALEN); } os_memcpy(p->psk, psk, psk_len); return; } if (ssid->mode != WPAS_MODE_P2P_GO || !ssid->p2p_persistent_group) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Ignore new_psk_cb on not-persistent GO"); return; } persistent = wpas_p2p_get_persistent(wpa_s->parent, NULL, ssid->ssid, ssid->ssid_len); if (!persistent) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not find persistent group information to store the new PSK"); return; } p = os_zalloc(sizeof(*p)); if (p == NULL) return; if (p2p_dev_addr) { p->p2p = 1; os_memcpy(p->addr, p2p_dev_addr, ETH_ALEN); } else { p->p2p = 0; os_memcpy(p->addr, mac_addr, ETH_ALEN); } os_memcpy(p->psk, psk, psk_len); if (dl_list_len(&persistent->psk_list) > P2P_MAX_STORED_CLIENTS) { struct psk_list_entry *last; last = dl_list_last(&persistent->psk_list, struct psk_list_entry, list); wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove oldest PSK entry for " MACSTR " (p2p=%u) to make room for a new one", MAC2STR(last->addr), last->p2p); dl_list_del(&last->list); os_free(last); } wpas_p2p_remove_psk_entry(wpa_s->parent, persistent, p2p_dev_addr ? p2p_dev_addr : mac_addr, p2p_dev_addr == NULL); if (p2p_dev_addr) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add new PSK for p2p_dev_addr=" MACSTR, MAC2STR(p2p_dev_addr)); } else { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Add new PSK for addr=" MACSTR, MAC2STR(mac_addr)); } dl_list_add(&persistent->psk_list, &p->list); #ifndef CONFIG_NO_CONFIG_WRITE if (wpa_s->parent->conf->update_config && wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf)) wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration"); #endif /* CONFIG_NO_CONFIG_WRITE */ } static void wpas_p2p_remove_psk(struct wpa_supplicant *wpa_s, struct wpa_ssid *s, const u8 *addr, int iface_addr) { int res; res = wpas_p2p_remove_psk_entry(wpa_s, s, addr, iface_addr); if (res > 0) { #ifndef CONFIG_NO_CONFIG_WRITE if (wpa_s->conf->update_config && wpa_config_write(wpa_s->confname, wpa_s->conf)) wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Failed to update configuration"); #endif /* CONFIG_NO_CONFIG_WRITE */ } } static void wpas_p2p_remove_client_go(struct wpa_supplicant *wpa_s, const u8 *peer, int iface_addr) { struct hostapd_data *hapd; struct hostapd_wpa_psk *psk, *prev, *rem; struct sta_info *sta; if (wpa_s->ap_iface == NULL || wpa_s->current_ssid == NULL || wpa_s->current_ssid->mode != WPAS_MODE_P2P_GO) return; /* Remove per-station PSK entry */ hapd = wpa_s->ap_iface->bss[0]; prev = NULL; psk = hapd->conf->ssid.wpa_psk; while (psk) { if ((iface_addr && os_memcmp(peer, psk->addr, ETH_ALEN) == 0) || (!iface_addr && os_memcmp(peer, psk->p2p_dev_addr, ETH_ALEN) == 0)) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove operating group PSK entry for " MACSTR " iface_addr=%d", MAC2STR(peer), iface_addr); if (prev) prev->next = psk->next; else hapd->conf->ssid.wpa_psk = psk->next; rem = psk; psk = psk->next; os_free(rem); } else { prev = psk; psk = psk->next; } } /* Disconnect from group */ if (iface_addr) sta = ap_get_sta(hapd, peer); else sta = ap_get_sta_p2p(hapd, peer); if (sta) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Disconnect peer " MACSTR " (iface_addr=%d) from group", MAC2STR(peer), iface_addr); hostapd_drv_sta_deauth(hapd, sta->addr, WLAN_REASON_DEAUTH_LEAVING); ap_sta_deauthenticate(hapd, sta, WLAN_REASON_DEAUTH_LEAVING); } } void wpas_p2p_remove_client(struct wpa_supplicant *wpa_s, const u8 *peer, int iface_addr) { struct wpa_ssid *s; struct wpa_supplicant *w; wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Remove client " MACSTR, MAC2STR(peer)); /* Remove from any persistent group */ for (s = wpa_s->parent->conf->ssid; s; s = s->next) { if (s->disabled != 2 || s->mode != WPAS_MODE_P2P_GO) continue; if (!iface_addr) wpas_remove_persistent_peer(wpa_s, s, peer, 0); wpas_p2p_remove_psk(wpa_s->parent, s, peer, iface_addr); } /* Remove from any operating group */ for (w = wpa_s->global->ifaces; w; w = w->next) wpas_p2p_remove_client_go(w, peer, iface_addr); } static void wpas_p2p_psk_failure_removal(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_PSK_FAILURE); } static void wpas_p2p_group_freq_conflict(void *eloop_ctx, void *timeout_ctx) { struct wpa_supplicant *wpa_s = eloop_ctx; wpa_printf(MSG_DEBUG, "P2P: Frequency conflict - terminate group"); wpas_p2p_group_delete(wpa_s, P2P_GROUP_REMOVAL_FREQ_CONFLICT); } int wpas_p2p_handle_frequency_conflicts(struct wpa_supplicant *wpa_s, int freq, struct wpa_ssid *ssid) { struct wpa_supplicant *iface; for (iface = wpa_s->global->ifaces; iface; iface = iface->next) { if (!iface->current_ssid || iface->current_ssid->frequency == freq || (iface->p2p_group_interface == NOT_P2P_GROUP_INTERFACE && !iface->current_ssid->p2p_group)) continue; /* Remove the connection with least priority */ if (!wpas_is_p2p_prioritized(iface)) { /* STA connection has priority over existing * P2P connection, so remove the interface. */ wpa_printf(MSG_DEBUG, "P2P: Removing P2P connection due to single channel concurrent mode frequency conflict"); eloop_register_timeout(0, 0, wpas_p2p_group_freq_conflict, iface, NULL); /* If connection in progress is P2P connection, do not * proceed for the connection. */ if (wpa_s == iface) return -1; else return 0; } else { /* P2P connection has priority, disable the STA network */ wpa_supplicant_disable_network(wpa_s->global->ifaces, ssid); wpa_msg(wpa_s->global->ifaces, MSG_INFO, WPA_EVENT_FREQ_CONFLICT " id=%d", ssid->id); os_memset(wpa_s->global->ifaces->pending_bssid, 0, ETH_ALEN); /* If P2P connection is in progress, continue * connecting...*/ if (wpa_s == iface) return 0; else return -1; } } return 0; } int wpas_p2p_4way_hs_failed(struct wpa_supplicant *wpa_s) { struct wpa_ssid *ssid = wpa_s->current_ssid; if (ssid == NULL || !ssid->p2p_group) return 0; if (wpa_s->p2p_last_4way_hs_fail && wpa_s->p2p_last_4way_hs_fail == ssid) { u8 go_dev_addr[ETH_ALEN]; struct wpa_ssid *persistent; if (wpas_p2p_persistent_group(wpa_s, go_dev_addr, ssid->ssid, ssid->ssid_len) <= 0) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Could not determine whether 4-way handshake failures were for a persistent group"); goto disconnect; } wpa_dbg(wpa_s, MSG_DEBUG, "P2P: Two 4-way handshake failures for a P2P group - go_dev_addr=" MACSTR, MAC2STR(go_dev_addr)); persistent = wpas_p2p_get_persistent(wpa_s->parent, go_dev_addr, ssid->ssid, ssid->ssid_len); if (persistent == NULL || persistent->mode != WPAS_MODE_INFRA) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No matching persistent group stored"); goto disconnect; } wpa_msg_global(wpa_s->parent, MSG_INFO, P2P_EVENT_PERSISTENT_PSK_FAIL "%d", persistent->id); disconnect: wpa_s->p2p_last_4way_hs_fail = NULL; /* * Remove the group from a timeout to avoid issues with caller * continuing to use the interface if this is on a P2P group * interface. */ eloop_register_timeout(0, 0, wpas_p2p_psk_failure_removal, wpa_s, NULL); return 1; } wpa_s->p2p_last_4way_hs_fail = ssid; return 0; } #ifdef CONFIG_WPS_NFC static struct wpabuf * wpas_p2p_nfc_handover(int ndef, struct wpabuf *wsc, struct wpabuf *p2p) { struct wpabuf *ret; size_t wsc_len; if (p2p == NULL) { wpabuf_free(wsc); wpa_printf(MSG_DEBUG, "P2P: No p2p buffer for handover"); return NULL; } wsc_len = wsc ? wpabuf_len(wsc) : 0; ret = wpabuf_alloc(2 + wsc_len + 2 + wpabuf_len(p2p)); if (ret == NULL) { wpabuf_free(wsc); wpabuf_free(p2p); return NULL; } wpabuf_put_be16(ret, wsc_len); if (wsc) wpabuf_put_buf(ret, wsc); wpabuf_put_be16(ret, wpabuf_len(p2p)); wpabuf_put_buf(ret, p2p); wpabuf_free(wsc); wpabuf_free(p2p); wpa_hexdump_buf(MSG_DEBUG, "P2P: Generated NFC connection handover message", ret); if (ndef && ret) { struct wpabuf *tmp; tmp = ndef_build_p2p(ret); wpabuf_free(ret); if (tmp == NULL) { wpa_printf(MSG_DEBUG, "P2P: Failed to NDEF encapsulate handover request"); return NULL; } ret = tmp; } return ret; } static int wpas_p2p_cli_freq(struct wpa_supplicant *wpa_s, struct wpa_ssid **ssid, u8 *go_dev_addr) { struct wpa_supplicant *iface; if (go_dev_addr) os_memset(go_dev_addr, 0, ETH_ALEN); if (ssid) *ssid = NULL; for (iface = wpa_s->global->ifaces; iface; iface = iface->next) { if (iface->wpa_state < WPA_ASSOCIATING || iface->current_ssid == NULL || iface->assoc_freq == 0 || !iface->current_ssid->p2p_group || iface->current_ssid->mode != WPAS_MODE_INFRA) continue; if (ssid) *ssid = iface->current_ssid; if (go_dev_addr) os_memcpy(go_dev_addr, iface->go_dev_addr, ETH_ALEN); return iface->assoc_freq; } return 0; } struct wpabuf * wpas_p2p_nfc_handover_req(struct wpa_supplicant *wpa_s, int ndef) { struct wpabuf *wsc, *p2p; struct wpa_ssid *ssid; u8 go_dev_addr[ETH_ALEN]; int cli_freq = wpas_p2p_cli_freq(wpa_s, &ssid, go_dev_addr); if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) { wpa_printf(MSG_DEBUG, "P2P: P2P disabled - cannot build handover request"); return NULL; } if (wpa_s->conf->wps_nfc_dh_pubkey == NULL && wps_nfc_gen_dh(&wpa_s->conf->wps_nfc_dh_pubkey, &wpa_s->conf->wps_nfc_dh_privkey) < 0) { wpa_dbg(wpa_s, MSG_DEBUG, "P2P: No DH key available for handover request"); return NULL; } if (cli_freq == 0) { wsc = wps_build_nfc_handover_req_p2p( wpa_s->parent->wps, wpa_s->conf->wps_nfc_dh_pubkey); } else wsc = NULL; p2p = p2p_build_nfc_handover_req(wpa_s->global->p2p, cli_freq, go_dev_addr, ssid ? ssid->ssid : NULL, ssid ? ssid->ssid_len : 0); return wpas_p2p_nfc_handover(ndef, wsc, p2p); } struct wpabuf * wpas_p2p_nfc_handover_sel(struct wpa_supplicant *wpa_s, int ndef, int tag) { struct wpabuf *wsc, *p2p; struct wpa_ssid *ssid; u8 go_dev_addr[ETH_ALEN]; int cli_freq = wpas_p2p_cli_freq(wpa_s, &ssid, go_dev_addr); if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return NULL; if (!tag && wpa_s->conf->wps_nfc_dh_pubkey == NULL && wps_nfc_gen_dh(&wpa_s->conf->wps_nfc_dh_pubkey, &wpa_s->conf->wps_nfc_dh_privkey) < 0) return NULL; if (cli_freq == 0) { wsc = wps_build_nfc_handover_sel_p2p( wpa_s->parent->wps, tag ? wpa_s->conf->wps_nfc_dev_pw_id : DEV_PW_NFC_CONNECTION_HANDOVER, wpa_s->conf->wps_nfc_dh_pubkey, tag ? wpa_s->conf->wps_nfc_dev_pw : NULL); } else wsc = NULL; p2p = p2p_build_nfc_handover_sel(wpa_s->global->p2p, cli_freq, go_dev_addr, ssid ? ssid->ssid : NULL, ssid ? ssid->ssid_len : 0); return wpas_p2p_nfc_handover(ndef, wsc, p2p); } static int wpas_p2p_nfc_join_group(struct wpa_supplicant *wpa_s, struct p2p_nfc_params *params) { wpa_printf(MSG_DEBUG, "P2P: Initiate join-group based on NFC " "connection handover (freq=%d)", params->go_freq); if (params->go_freq && params->go_ssid_len) { wpa_s->p2p_wps_method = WPS_NFC; wpa_s->pending_join_wps_method = WPS_NFC; os_memset(wpa_s->pending_join_iface_addr, 0, ETH_ALEN); os_memcpy(wpa_s->pending_join_dev_addr, params->go_dev_addr, ETH_ALEN); return wpas_p2p_join_start(wpa_s, params->go_freq, params->go_ssid, params->go_ssid_len); } return wpas_p2p_connect(wpa_s, params->peer->p2p_device_addr, NULL, WPS_NFC, 0, 0, 1, 0, wpa_s->conf->p2p_go_intent, params->go_freq, -1, 0, 1, 1); } static int wpas_p2p_nfc_auth_join(struct wpa_supplicant *wpa_s, struct p2p_nfc_params *params, int tag) { int res, persistent; struct wpa_ssid *ssid; wpa_printf(MSG_DEBUG, "P2P: Authorize join-group based on NFC " "connection handover"); for (wpa_s = wpa_s->global->ifaces; wpa_s; wpa_s = wpa_s->next) { ssid = wpa_s->current_ssid; if (ssid == NULL) continue; if (ssid->mode != WPAS_MODE_P2P_GO) continue; if (wpa_s->ap_iface == NULL) continue; break; } if (wpa_s == NULL) { wpa_printf(MSG_DEBUG, "P2P: Could not find GO interface"); return -1; } if (wpa_s->parent->p2p_oob_dev_pw_id != DEV_PW_NFC_CONNECTION_HANDOVER && !wpa_s->parent->p2p_oob_dev_pw) { wpa_printf(MSG_DEBUG, "P2P: No NFC Dev Pw known"); return -1; } res = wpas_ap_wps_add_nfc_pw( wpa_s, wpa_s->parent->p2p_oob_dev_pw_id, wpa_s->parent->p2p_oob_dev_pw, wpa_s->parent->p2p_peer_oob_pk_hash_known ? wpa_s->parent->p2p_peer_oob_pubkey_hash : NULL); if (res) return res; if (!tag) { wpa_printf(MSG_DEBUG, "P2P: Negotiated handover - wait for peer to join without invitation"); return 0; } if (!params->peer || !(params->peer->dev_capab & P2P_DEV_CAPAB_INVITATION_PROCEDURE)) return 0; wpa_printf(MSG_DEBUG, "P2P: Static handover - invite peer " MACSTR " to join", MAC2STR(params->peer->p2p_device_addr)); wpa_s->global->p2p_invite_group = wpa_s; persistent = ssid->p2p_persistent_group && wpas_p2p_get_persistent(wpa_s->parent, params->peer->p2p_device_addr, ssid->ssid, ssid->ssid_len); wpa_s->parent->pending_invite_ssid_id = -1; return p2p_invite(wpa_s->global->p2p, params->peer->p2p_device_addr, P2P_INVITE_ROLE_ACTIVE_GO, wpa_s->own_addr, ssid->ssid, ssid->ssid_len, ssid->frequency, wpa_s->global->p2p_dev_addr, persistent, 0, wpa_s->parent->p2p_oob_dev_pw_id); } static int wpas_p2p_nfc_init_go_neg(struct wpa_supplicant *wpa_s, struct p2p_nfc_params *params) { wpa_printf(MSG_DEBUG, "P2P: Initiate GO Negotiation based on NFC " "connection handover"); return wpas_p2p_connect(wpa_s, params->peer->p2p_device_addr, NULL, WPS_NFC, 0, 0, 0, 0, wpa_s->conf->p2p_go_intent, 0, -1, 0, 1, 1); } static int wpas_p2p_nfc_resp_go_neg(struct wpa_supplicant *wpa_s, struct p2p_nfc_params *params) { int res; wpa_printf(MSG_DEBUG, "P2P: Authorize GO Negotiation based on NFC " "connection handover"); res = wpas_p2p_connect(wpa_s, params->peer->p2p_device_addr, NULL, WPS_NFC, 0, 0, 0, 1, wpa_s->conf->p2p_go_intent, 0, -1, 0, 1, 1); if (res) return res; res = wpas_p2p_listen(wpa_s, 60); if (res) { p2p_unauthorize(wpa_s->global->p2p, params->peer->p2p_device_addr); } return res; } static int wpas_p2p_nfc_connection_handover(struct wpa_supplicant *wpa_s, const struct wpabuf *data, int sel, int tag) { const u8 *pos, *end; u16 len, id; struct p2p_nfc_params params; int res; os_memset(¶ms, 0, sizeof(params)); params.sel = sel; wpa_hexdump_buf(MSG_DEBUG, "P2P: Received NFC tag payload", data); pos = wpabuf_head(data); end = pos + wpabuf_len(data); if (end - pos < 2) { wpa_printf(MSG_DEBUG, "P2P: Not enough data for Length of WSC " "attributes"); return -1; } len = WPA_GET_BE16(pos); pos += 2; if (pos + len > end) { wpa_printf(MSG_DEBUG, "P2P: Not enough data for WSC " "attributes"); return -1; } params.wsc_attr = pos; params.wsc_len = len; pos += len; if (end - pos < 2) { wpa_printf(MSG_DEBUG, "P2P: Not enough data for Length of P2P " "attributes"); return -1; } len = WPA_GET_BE16(pos); pos += 2; if (pos + len > end) { wpa_printf(MSG_DEBUG, "P2P: Not enough data for P2P " "attributes"); return -1; } params.p2p_attr = pos; params.p2p_len = len; pos += len; wpa_hexdump(MSG_DEBUG, "P2P: WSC attributes", params.wsc_attr, params.wsc_len); wpa_hexdump(MSG_DEBUG, "P2P: P2P attributes", params.p2p_attr, params.p2p_len); if (pos < end) { wpa_hexdump(MSG_DEBUG, "P2P: Ignored extra data after P2P attributes", pos, end - pos); } res = p2p_process_nfc_connection_handover(wpa_s->global->p2p, ¶ms); if (res) return res; if (params.next_step == NO_ACTION) return 0; if (params.next_step == BOTH_GO) { wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_BOTH_GO "peer=" MACSTR, MAC2STR(params.peer->p2p_device_addr)); return 0; } if (params.next_step == PEER_CLIENT) { if (!is_zero_ether_addr(params.go_dev_addr)) { wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_PEER_CLIENT "peer=" MACSTR " freq=%d go_dev_addr=" MACSTR " ssid=\"%s\"", MAC2STR(params.peer->p2p_device_addr), params.go_freq, MAC2STR(params.go_dev_addr), wpa_ssid_txt(params.go_ssid, params.go_ssid_len)); } else { wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_PEER_CLIENT "peer=" MACSTR " freq=%d", MAC2STR(params.peer->p2p_device_addr), params.go_freq); } return 0; } if (wpas_p2p_cli_freq(wpa_s, NULL, NULL)) { wpa_msg(wpa_s, MSG_INFO, P2P_EVENT_NFC_WHILE_CLIENT "peer=" MACSTR, MAC2STR(params.peer->p2p_device_addr)); return 0; } wpabuf_free(wpa_s->p2p_oob_dev_pw); wpa_s->p2p_oob_dev_pw = NULL; if (params.oob_dev_pw_len < WPS_OOB_PUBKEY_HASH_LEN + 2) { wpa_printf(MSG_DEBUG, "P2P: No peer OOB Dev Pw " "received"); return -1; } id = WPA_GET_BE16(params.oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN); wpa_printf(MSG_DEBUG, "P2P: Peer OOB Dev Pw %u", id); wpa_hexdump(MSG_DEBUG, "P2P: Peer OOB Public Key hash", params.oob_dev_pw, WPS_OOB_PUBKEY_HASH_LEN); os_memcpy(wpa_s->p2p_peer_oob_pubkey_hash, params.oob_dev_pw, WPS_OOB_PUBKEY_HASH_LEN); wpa_s->p2p_peer_oob_pk_hash_known = 1; if (tag) { if (id < 0x10) { wpa_printf(MSG_DEBUG, "P2P: Static handover - invalid " "peer OOB Device Password Id %u", id); return -1; } wpa_printf(MSG_DEBUG, "P2P: Static handover - use peer OOB " "Device Password Id %u", id); wpa_hexdump_key(MSG_DEBUG, "P2P: Peer OOB Device Password", params.oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN + 2, params.oob_dev_pw_len - WPS_OOB_PUBKEY_HASH_LEN - 2); wpa_s->p2p_oob_dev_pw_id = id; wpa_s->p2p_oob_dev_pw = wpabuf_alloc_copy( params.oob_dev_pw + WPS_OOB_PUBKEY_HASH_LEN + 2, params.oob_dev_pw_len - WPS_OOB_PUBKEY_HASH_LEN - 2); if (wpa_s->p2p_oob_dev_pw == NULL) return -1; if (wpa_s->conf->wps_nfc_dh_pubkey == NULL && wps_nfc_gen_dh(&wpa_s->conf->wps_nfc_dh_pubkey, &wpa_s->conf->wps_nfc_dh_privkey) < 0) return -1; } else { wpa_printf(MSG_DEBUG, "P2P: Using abbreviated WPS handshake " "without Device Password"); wpa_s->p2p_oob_dev_pw_id = DEV_PW_NFC_CONNECTION_HANDOVER; } switch (params.next_step) { case NO_ACTION: case BOTH_GO: case PEER_CLIENT: /* already covered above */ return 0; case JOIN_GROUP: return wpas_p2p_nfc_join_group(wpa_s, ¶ms); case AUTH_JOIN: return wpas_p2p_nfc_auth_join(wpa_s, ¶ms, tag); case INIT_GO_NEG: return wpas_p2p_nfc_init_go_neg(wpa_s, ¶ms); case RESP_GO_NEG: /* TODO: use own OOB Dev Pw */ return wpas_p2p_nfc_resp_go_neg(wpa_s, ¶ms); } return -1; } int wpas_p2p_nfc_tag_process(struct wpa_supplicant *wpa_s, const struct wpabuf *data) { if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; return wpas_p2p_nfc_connection_handover(wpa_s, data, 1, 1); } int wpas_p2p_nfc_report_handover(struct wpa_supplicant *wpa_s, int init, const struct wpabuf *req, const struct wpabuf *sel) { struct wpabuf *tmp; int ret; if (wpa_s->global->p2p_disabled || wpa_s->global->p2p == NULL) return -1; wpa_printf(MSG_DEBUG, "NFC: P2P connection handover reported"); wpa_hexdump_ascii(MSG_DEBUG, "NFC: Req", wpabuf_head(req), wpabuf_len(req)); wpa_hexdump_ascii(MSG_DEBUG, "NFC: Sel", wpabuf_head(sel), wpabuf_len(sel)); tmp = ndef_parse_p2p(init ? sel : req); if (tmp == NULL) { wpa_printf(MSG_DEBUG, "P2P: Could not parse NDEF"); return -1; } ret = wpas_p2p_nfc_connection_handover(wpa_s, tmp, init, 0); wpabuf_free(tmp); return ret; } int wpas_p2p_nfc_tag_enabled(struct wpa_supplicant *wpa_s, int enabled) { const u8 *if_addr; int go_intent = wpa_s->conf->p2p_go_intent; struct wpa_supplicant *iface; if (wpa_s->global->p2p == NULL) return -1; if (!enabled) { wpa_printf(MSG_DEBUG, "P2P: Disable use of own NFC Tag"); for (iface = wpa_s->global->ifaces; iface; iface = iface->next) { if (!iface->ap_iface) continue; hostapd_wps_nfc_token_disable(iface->ap_iface->bss[0]); } p2p_set_authorized_oob_dev_pw_id(wpa_s->global->p2p, 0, 0, NULL); if (wpa_s->p2p_nfc_tag_enabled) wpas_p2p_remove_pending_group_interface(wpa_s); wpa_s->p2p_nfc_tag_enabled = 0; return 0; } if (wpa_s->global->p2p_disabled) return -1; if (wpa_s->conf->wps_nfc_dh_pubkey == NULL || wpa_s->conf->wps_nfc_dh_privkey == NULL || wpa_s->conf->wps_nfc_dev_pw == NULL || wpa_s->conf->wps_nfc_dev_pw_id < 0x10) { wpa_printf(MSG_DEBUG, "P2P: NFC password token not configured " "to allow static handover cases"); return -1; } wpa_printf(MSG_DEBUG, "P2P: Enable use of own NFC Tag"); wpa_s->p2p_oob_dev_pw_id = wpa_s->conf->wps_nfc_dev_pw_id; wpabuf_free(wpa_s->p2p_oob_dev_pw); wpa_s->p2p_oob_dev_pw = wpabuf_dup(wpa_s->conf->wps_nfc_dev_pw); if (wpa_s->p2p_oob_dev_pw == NULL) return -1; wpa_s->p2p_peer_oob_pk_hash_known = 0; wpa_s->create_p2p_iface = wpas_p2p_create_iface(wpa_s); if (wpa_s->create_p2p_iface) { enum wpa_driver_if_type iftype; /* Prepare to add a new interface for the group */ iftype = WPA_IF_P2P_GROUP; if (go_intent == 15) iftype = WPA_IF_P2P_GO; if (wpas_p2p_add_group_interface(wpa_s, iftype) < 0) { wpa_printf(MSG_ERROR, "P2P: Failed to allocate a new " "interface for the group"); return -1; } if_addr = wpa_s->pending_interface_addr; } else if_addr = wpa_s->own_addr; wpa_s->p2p_nfc_tag_enabled = enabled; for (iface = wpa_s->global->ifaces; iface; iface = iface->next) { struct hostapd_data *hapd; if (iface->ap_iface == NULL) continue; hapd = iface->ap_iface->bss[0]; wpabuf_free(hapd->conf->wps_nfc_dh_pubkey); hapd->conf->wps_nfc_dh_pubkey = wpabuf_dup(wpa_s->conf->wps_nfc_dh_pubkey); wpabuf_free(hapd->conf->wps_nfc_dh_privkey); hapd->conf->wps_nfc_dh_privkey = wpabuf_dup(wpa_s->conf->wps_nfc_dh_privkey); wpabuf_free(hapd->conf->wps_nfc_dev_pw); hapd->conf->wps_nfc_dev_pw = wpabuf_dup(wpa_s->conf->wps_nfc_dev_pw); hapd->conf->wps_nfc_dev_pw_id = wpa_s->conf->wps_nfc_dev_pw_id; if (hostapd_wps_nfc_token_enable(iface->ap_iface->bss[0]) < 0) { wpa_dbg(iface, MSG_DEBUG, "P2P: Failed to enable NFC Tag for GO"); } } p2p_set_authorized_oob_dev_pw_id( wpa_s->global->p2p, wpa_s->conf->wps_nfc_dev_pw_id, go_intent, if_addr); return 0; } #endif /* CONFIG_WPS_NFC */