void eloop_run(void) { int num_poll_fds; int timeout_ms = 0; int res; struct os_reltime tv, now; bzero(&now, sizeof(struct os_reltime)); while (!eloop.terminate && (!dl_list_empty(&eloop.timeout) || eloop.readers.count > 0 || eloop.writers.count > 0 || eloop.exceptions.count > 0)) { struct eloop_timeout *timeout; timeout = dl_list_first(&eloop.timeout, struct eloop_timeout, list); if (timeout) { os_get_reltime(&now); if (os_reltime_before(&now, &timeout->time)) os_reltime_sub(&timeout->time, &now, &tv); else tv.sec = tv.usec = 0; timeout_ms = tv.sec * 1000 + tv.usec / 1000; } num_poll_fds = eloop_sock_table_set_fds(&eloop.readers, &eloop.writers, &eloop.exceptions, eloop.pollfds, eloop.pollfds_map, eloop.max_pollfd_map); res = poll(eloop.pollfds, num_poll_fds, timeout ? timeout_ms : -1); if (res < 0 && errno != EINTR && errno != 0) { fprintf(stderr, "eloop: poll: %s", strerror(errno)); goto out; } timeout = dl_list_first(&eloop.timeout, struct eloop_timeout, list); if (timeout) { os_get_reltime(&now); if (!os_reltime_before(&now, &timeout->time)) { void *eloop_data = timeout->eloop_data; void *user_data = timeout->user_data; eloop_timeout_handler handler = timeout->handler; eloop_remove_timeout(timeout); handler(eloop_data, user_data); } } if (res <= 0) continue; eloop_sock_table_dispatch(&eloop.readers, &eloop.writers, &eloop.exceptions, eloop.pollfds_map, eloop.max_pollfd_map); } out: return; }
int eloop_replenish_timeout(unsigned int req_secs, unsigned int req_usecs, eloop_timeout_handler handler, void *eloop_data, void *user_data) { struct os_reltime now, requested, remaining; struct eloop_timeout *tmp; dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) { if (tmp->handler == handler && tmp->eloop_data == eloop_data && tmp->user_data == user_data) { requested.sec = req_secs; requested.usec = req_usecs; os_get_reltime(&now); os_reltime_sub(&tmp->time, &now, &remaining); if (os_reltime_before(&remaining, &requested)) { eloop_cancel_timeout(handler, eloop_data, user_data); eloop_register_timeout(requested.sec, requested.usec, handler, eloop_data, user_data); return 1; } return 0; } } return -1; }
int eloop_cancel_timeout_one(eloop_timeout_handler handler, void *eloop_data, void *user_data, struct os_reltime *remaining) { struct eloop_timeout *timeout, *prev; int removed = 0; struct os_reltime now; os_get_reltime(&now); remaining->sec = remaining->usec = 0; dl_list_for_each_safe(timeout, prev, &eloop.timeout, struct eloop_timeout, list) { if (timeout->handler == handler && (timeout->eloop_data == eloop_data) && (timeout->user_data == user_data)) { removed = 1; if (os_reltime_before(&now, &timeout->time)) os_reltime_sub(&timeout->time, &now, remaining); eloop_remove_timeout(timeout); break; } } return removed; }
int wnm_scan_process(struct wpa_supplicant *wpa_s, int reply_on_fail) { struct wpa_bss *bss; struct wpa_ssid *ssid = wpa_s->current_ssid; enum bss_trans_mgmt_status_code status = WNM_BSS_TM_REJECT_UNSPECIFIED; enum mbo_transition_reject_reason reason = MBO_TRANSITION_REJECT_REASON_UNSPECIFIED; if (!wpa_s->wnm_neighbor_report_elements) return 0; wpa_dbg(wpa_s, MSG_DEBUG, "WNM: Process scan results for BSS Transition Management"); if (os_reltime_before(&wpa_s->wnm_cand_valid_until, &wpa_s->scan_trigger_time)) { wpa_printf(MSG_DEBUG, "WNM: Previously stored BSS transition candidate list is not valid anymore - drop it"); wnm_deallocate_memory(wpa_s); return 0; } if (!wpa_s->current_bss || os_memcmp(wpa_s->wnm_cand_from_bss, wpa_s->current_bss->bssid, ETH_ALEN) != 0) { wpa_printf(MSG_DEBUG, "WNM: Stored BSS transition candidate list not from the current BSS - ignore it"); return 0; } /* Compare the Neighbor Report and scan results */ bss = compare_scan_neighbor_results(wpa_s, 0, &reason); if (!bss) { wpa_printf(MSG_DEBUG, "WNM: No BSS transition candidate match found"); status = WNM_BSS_TM_REJECT_NO_SUITABLE_CANDIDATES; goto send_bss_resp_fail; } /* Associate to the network */ wnm_bss_tm_connect(wpa_s, bss, ssid, 1); return 1; send_bss_resp_fail: if (!reply_on_fail) return 0; /* Send reject response for all the failures */ if (wpa_s->wnm_reply) { wpa_s->wnm_reply = 0; wnm_send_bss_transition_mgmt_resp(wpa_s, wpa_s->wnm_dialog_token, status, reason, 0, NULL); } wnm_deallocate_memory(wpa_s); return 0; }
int eloop_register_timeout(unsigned int secs, unsigned int usecs, eloop_timeout_handler handler, void *eloop_data, void *user_data) { struct eloop_timeout *timeout, *tmp; os_time_t now_sec; timeout = os_zalloc(sizeof(*timeout)); if (timeout == NULL) return -1; if (os_get_reltime(&timeout->time) < 0) { os_free(timeout); return -1; } now_sec = timeout->time.sec; timeout->time.sec += secs; if (timeout->time.sec < now_sec) { /* * Integer overflow - assume long enough timeout to be assumed * to be infinite, i.e., the timeout would never happen. */ wpa_printf(MSG_DEBUG, "ELOOP: Too long timeout (secs=%u) to " "ever happen - ignore it", secs); os_free(timeout); return 0; } timeout->time.usec += usecs; while (timeout->time.usec >= 1000000) { timeout->time.sec++; timeout->time.usec -= 1000000; } timeout->eloop_data = eloop_data; timeout->user_data = user_data; timeout->handler = handler; wpa_trace_add_ref(timeout, eloop, eloop_data); wpa_trace_add_ref(timeout, user, user_data); wpa_trace_record(timeout); /* Maintain timeouts in order of increasing time */ dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) { if (os_reltime_before(&timeout->time, &tmp->time)) { dl_list_add(tmp->list.prev, &timeout->list); return 0; } } dl_list_add_tail(&eloop.timeout, &timeout->list); return 0; }
/** * wpa_bss_get_bssid_latest - Fetch the latest BSS table entry based on BSSID * @wpa_s: Pointer to wpa_supplicant data * @bssid: BSSID * Returns: Pointer to the BSS entry or %NULL if not found * * This function is like wpa_bss_get_bssid(), but full BSS table is iterated to * find the entry that has the most recent update. This can help in finding the * correct entry in cases where the SSID of the AP may have changed recently * (e.g., in WPS reconfiguration cases). */ struct wpa_bss * wpa_bss_get_bssid_latest(struct wpa_supplicant *wpa_s, const u8 *bssid) { struct wpa_bss *bss, *found = NULL; if (!wpa_supplicant_filter_bssid_match(wpa_s, bssid)) return NULL; dl_list_for_each_reverse(bss, &wpa_s->bss, struct wpa_bss, list) { if (os_memcmp(bss->bssid, bssid, ETH_ALEN) != 0) continue; if (found == NULL || os_reltime_before(&found->last_update, &bss->last_update)) found = bss; } return found; }
void wpa_supplicant_update_scan_int(struct wpa_supplicant *wpa_s, int sec) { struct os_reltime remaining, new_int; int cancelled; cancelled = eloop_cancel_timeout_one(wpa_supplicant_scan, wpa_s, NULL, &remaining); new_int.sec = sec; new_int.usec = 0; if (cancelled && os_reltime_before(&remaining, &new_int)) { new_int.sec = remaining.sec; new_int.usec = remaining.usec; } if (cancelled) { eloop_register_timeout(new_int.sec, new_int.usec, wpa_supplicant_scan, wpa_s, NULL); } wpa_s->scan_interval = sec; }
/** * wpa_bss_flush_by_age - Flush old BSS entries * @wpa_s: Pointer to wpa_supplicant data * @age: Maximum entry age in seconds * * Remove BSS entries that have not been updated during the last @age seconds. */ void wpa_bss_flush_by_age(struct wpa_supplicant *wpa_s, int age) { struct wpa_bss *bss, *n; struct os_reltime t; if (dl_list_empty(&wpa_s->bss)) return; os_get_reltime(&t); t.sec -= age; dl_list_for_each_safe(bss, n, &wpa_s->bss, struct wpa_bss, list) { if (wpa_bss_in_use(wpa_s, bss)) continue; if (os_reltime_before(&bss->last_update, &t)) { wpa_bss_remove(wpa_s, bss, __func__); } else break; } }
int eloop_register_timeout(unsigned int secs, unsigned int usecs, eloop_timeout_handler handler, void *eloop_data, void *user_data) { struct eloop_timeout *timeout, *tmp; os_time_t now_sec; timeout = os_zalloc(sizeof(*timeout)); if (timeout == NULL) return -1; if (os_get_reltime(&timeout->time) < 0) { os_free(timeout); return -1; } now_sec = timeout->time.sec; timeout->time.sec += secs; if (timeout->time.sec < now_sec) { fprintf(stderr, "ELOOP: Too long timeout (secs=%u) to " "ever happen - ignore it", secs); os_free(timeout); return 0; } timeout->time.usec += usecs; while (timeout->time.usec >= 1000000) { timeout->time.sec++; timeout->time.usec -= 1000000; } timeout->eloop_data = eloop_data; timeout->user_data = user_data; timeout->handler = handler; dl_list_for_each(tmp, &eloop.timeout, struct eloop_timeout, list) { if (os_reltime_before(&timeout->time, &tmp->time)) { dl_list_add(tmp->list.prev, &timeout->list); return 0; } } dl_list_add_tail(&eloop.timeout, &timeout->list); return 0; }
void eloop_run(void) { #ifdef CONFIG_ELOOP_POLL int num_poll_fds; int timeout_ms = 0; #endif /* CONFIG_ELOOP_POLL */ #ifdef CONFIG_ELOOP_SELECT fd_set *rfds, *wfds, *efds; struct timeval _tv; #endif /* CONFIG_ELOOP_SELECT */ #ifdef CONFIG_ELOOP_EPOLL int timeout_ms = -1; #endif /* CONFIG_ELOOP_EPOLL */ int res; struct os_reltime tv, now; #ifdef CONFIG_ELOOP_SELECT rfds = os_malloc(sizeof(*rfds)); wfds = os_malloc(sizeof(*wfds)); efds = os_malloc(sizeof(*efds)); if (rfds == NULL || wfds == NULL || efds == NULL) goto out; #endif /* CONFIG_ELOOP_SELECT */ while (!eloop.terminate && (!dl_list_empty(&eloop.timeout) || eloop.readers.count > 0 || eloop.writers.count > 0 || eloop.exceptions.count > 0)) { struct eloop_timeout *timeout; timeout = dl_list_first(&eloop.timeout, struct eloop_timeout, list); if (timeout) { os_get_reltime(&now); if (os_reltime_before(&now, &timeout->time)) os_reltime_sub(&timeout->time, &now, &tv); else tv.sec = tv.usec = 0; #if defined(CONFIG_ELOOP_POLL) || defined(CONFIG_ELOOP_EPOLL) timeout_ms = tv.sec * 1000 + tv.usec / 1000; #endif /* defined(CONFIG_ELOOP_POLL) || defined(CONFIG_ELOOP_EPOLL) */ #ifdef CONFIG_ELOOP_SELECT _tv.tv_sec = tv.sec; _tv.tv_usec = tv.usec; #endif /* CONFIG_ELOOP_SELECT */ } #ifdef CONFIG_ELOOP_POLL num_poll_fds = eloop_sock_table_set_fds( &eloop.readers, &eloop.writers, &eloop.exceptions, eloop.pollfds, eloop.pollfds_map, eloop.max_pollfd_map); res = poll(eloop.pollfds, num_poll_fds, timeout ? timeout_ms : -1); #endif /* CONFIG_ELOOP_POLL */ #ifdef CONFIG_ELOOP_SELECT eloop_sock_table_set_fds(&eloop.readers, rfds); eloop_sock_table_set_fds(&eloop.writers, wfds); eloop_sock_table_set_fds(&eloop.exceptions, efds); res = select(eloop.max_sock + 1, rfds, wfds, efds, timeout ? &_tv : NULL); #endif /* CONFIG_ELOOP_SELECT */ #ifdef CONFIG_ELOOP_EPOLL if (eloop.count == 0) { res = 0; } else { res = epoll_wait(eloop.epollfd, eloop.epoll_events, eloop.count, timeout_ms); } #endif /* CONFIG_ELOOP_EPOLL */ if (res < 0 && errno != EINTR && errno != 0) { wpa_printf(MSG_ERROR, "eloop: %s: %s", #ifdef CONFIG_ELOOP_POLL "poll" #endif /* CONFIG_ELOOP_POLL */ #ifdef CONFIG_ELOOP_SELECT "select" #endif /* CONFIG_ELOOP_SELECT */ #ifdef CONFIG_ELOOP_EPOLL "epoll" #endif /* CONFIG_ELOOP_EPOLL */ , strerror(errno)); goto out; } eloop_process_pending_signals(); /* check if some registered timeouts have occurred */ timeout = dl_list_first(&eloop.timeout, struct eloop_timeout, list); if (timeout) { os_get_reltime(&now); if (!os_reltime_before(&now, &timeout->time)) { void *eloop_data = timeout->eloop_data; void *user_data = timeout->user_data; eloop_timeout_handler handler = timeout->handler; eloop_remove_timeout(timeout); handler(eloop_data, user_data); } } if (res <= 0) continue; #ifdef CONFIG_ELOOP_POLL eloop_sock_table_dispatch(&eloop.readers, &eloop.writers, &eloop.exceptions, eloop.pollfds_map, eloop.max_pollfd_map); #endif /* CONFIG_ELOOP_POLL */ #ifdef CONFIG_ELOOP_SELECT eloop_sock_table_dispatch(&eloop.readers, rfds); eloop_sock_table_dispatch(&eloop.writers, wfds); eloop_sock_table_dispatch(&eloop.exceptions, efds); #endif /* CONFIG_ELOOP_SELECT */ #ifdef CONFIG_ELOOP_EPOLL eloop_sock_table_dispatch(eloop.epoll_events, res); #endif /* CONFIG_ELOOP_EPOLL */ } eloop.terminate = 0; out: #ifdef CONFIG_ELOOP_SELECT os_free(rfds); os_free(wfds); os_free(efds); #endif /* CONFIG_ELOOP_SELECT */ return; }
/** * wpa_bss_update_scan_res - Update a BSS table entry based on a scan result * @wpa_s: Pointer to wpa_supplicant data * @res: Scan result * @fetch_time: Time when the result was fetched from the driver * * This function updates a BSS table entry (or adds one) based on a scan result. * This is called separately for each scan result between the calls to * wpa_bss_update_start() and wpa_bss_update_end(). */ void wpa_bss_update_scan_res(struct wpa_supplicant *wpa_s, struct wpa_scan_res *res, struct os_reltime *fetch_time) { const u8 *ssid, *p2p, *mesh; struct wpa_bss *bss; if (wpa_s->conf->ignore_old_scan_res) { struct os_reltime update; calculate_update_time(fetch_time, res->age, &update); if (os_reltime_before(&update, &wpa_s->scan_trigger_time)) { struct os_reltime age; os_reltime_sub(&wpa_s->scan_trigger_time, &update, &age); wpa_dbg(wpa_s, MSG_DEBUG, "BSS: Ignore driver BSS " "table entry that is %u.%06u seconds older " "than our scan trigger", (unsigned int) age.sec, (unsigned int) age.usec); return; } } ssid = wpa_scan_get_ie(res, WLAN_EID_SSID); if (ssid == NULL) { wpa_dbg(wpa_s, MSG_DEBUG, "BSS: No SSID IE included for " MACSTR, MAC2STR(res->bssid)); return; } if (ssid[1] > SSID_MAX_LEN) { wpa_dbg(wpa_s, MSG_DEBUG, "BSS: Too long SSID IE included for " MACSTR, MAC2STR(res->bssid)); return; } p2p = wpa_scan_get_vendor_ie(res, P2P_IE_VENDOR_TYPE); #ifdef CONFIG_P2P if (p2p == NULL && wpa_s->p2p_group_interface != NOT_P2P_GROUP_INTERFACE) { /* * If it's a P2P specific interface, then don't update * the scan result without a P2P IE. */ wpa_printf(MSG_DEBUG, "BSS: No P2P IE - skipping BSS " MACSTR " update for P2P interface", MAC2STR(res->bssid)); return; } #endif /* CONFIG_P2P */ if (p2p && ssid[1] == P2P_WILDCARD_SSID_LEN && os_memcmp(ssid + 2, P2P_WILDCARD_SSID, P2P_WILDCARD_SSID_LEN) == 0) return; /* Skip P2P listen discovery results here */ /* TODO: add option for ignoring BSSes we are not interested in * (to save memory) */ mesh = wpa_scan_get_ie(res, WLAN_EID_MESH_ID); if (mesh && mesh[1] <= SSID_MAX_LEN) ssid = mesh; bss = wpa_bss_get(wpa_s, res->bssid, ssid + 2, ssid[1]); if (bss == NULL) bss = wpa_bss_add(wpa_s, ssid + 2, ssid[1], res, fetch_time); else { bss = wpa_bss_update(wpa_s, bss, res, fetch_time); if (wpa_s->last_scan_res) { unsigned int i; for (i = 0; i < wpa_s->last_scan_res_used; i++) { if (bss == wpa_s->last_scan_res[i]) { /* Already in the list */ return; } } } } if (bss == NULL) return; if (wpa_s->last_scan_res_used >= wpa_s->last_scan_res_size) { struct wpa_bss **n; unsigned int siz; if (wpa_s->last_scan_res_size == 0) siz = 32; else siz = wpa_s->last_scan_res_size * 2; n = os_realloc_array(wpa_s->last_scan_res, siz, sizeof(struct wpa_bss *)); if (n == NULL) return; wpa_s->last_scan_res = n; wpa_s->last_scan_res_size = siz; } if (wpa_s->last_scan_res) wpa_s->last_scan_res[wpa_s->last_scan_res_used++] = bss; }