Imported Upstream version 1.38
[platform/upstream/connman.git] / plugins / wifi.c
index 34c16df..fc304e3 100644 (file)
@@ -30,9 +30,8 @@
 #include <string.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
-#include <linux/if_arp.h>
-#include <linux/wireless.h>
 #include <net/ethernet.h>
+#include <linux/wireless.h>
 
 #ifndef IFF_LOWER_UP
 #define IFF_LOWER_UP   0x10000
 #include <connman/provision.h>
 #include <connman/utsname.h>
 #include <connman/machine.h>
+#include <connman/tethering.h>
 
 #include <gsupplicant/gsupplicant.h>
 
+#include "src/shared/util.h"
+
 #define CLEANUP_TIMEOUT   8    /* in seconds */
 #define INACTIVE_TIMEOUT  12   /* in seconds */
 #define FAVORITE_MAXIMUM_RETRIES 2
 
-#define BGSCAN_DEFAULT "simple:30:-45:300"
-#define AUTOSCAN_DEFAULT "exponential:3:300"
+#define BGSCAN_DEFAULT "simple:30:-65:300"
+#define AUTOSCAN_EXPONENTIAL "exponential:3:300"
+#define AUTOSCAN_SINGLE "single:3"
 
 #define P2P_FIND_TIMEOUT 30
 #define P2P_CONNECTION_TIMEOUT 100
@@ -83,6 +86,12 @@ enum wifi_ap_capability{
        WIFI_AP_NOT_SUPPORTED   = 2,
 };
 
+enum wifi_scanning_type {
+       WIFI_SCANNING_UNKNOWN   = 0,
+       WIFI_SCANNING_PASSIVE   = 1,
+       WIFI_SCANNING_ACTIVE    = 2,
+};
+
 struct hidden_params {
        char ssid[32];
        unsigned int ssid_len;
@@ -143,7 +152,7 @@ struct wifi_data {
         * autoscan "emulation".
         */
        struct autoscan_params *autoscan;
-
+       enum wifi_scanning_type scanning_type;
        GSupplicantScanParams *scan_params;
        unsigned int p2p_find_timeout;
        unsigned int p2p_connection_timeout;
@@ -160,7 +169,7 @@ static GList *iface_list = NULL;
 
 static GList *pending_wifi_device = NULL;
 static GList *p2p_iface_list = NULL;
-bool wfd_service_registered = false;
+static bool wfd_service_registered = false;
 
 static void start_autoscan(struct connman_device *device);
 static int tech_set_tethering(struct connman_technology *technology,
@@ -596,10 +605,8 @@ static int peer_register_service(const unsigned char *specification,
                params = fill_in_peer_service_params(specification,
                                                specification_length, query,
                                                query_length, version);
-               if (!params) {
-                       ret = -ENOMEM;
+               if (!params)
                        continue;
-               }
 
                if (!found) {
                        ret_f = g_supplicant_interface_p2p_add_service(iface,
@@ -684,10 +691,8 @@ static int peer_unregister_service(const unsigned char *specification,
                params = fill_in_peer_service_params(specification,
                                                specification_length, query,
                                                query_length, version);
-               if (!params) {
-                       ret = -ENOMEM;
+               if (!params)
                        continue;
-               }
 
                ret = g_supplicant_interface_p2p_del_service(iface, params);
                if (ret != 0 && ret != -EINPROGRESS)
@@ -831,13 +836,13 @@ static void reset_autoscan(struct connman_device *device)
 
        autoscan = wifi->autoscan;
 
-       if (autoscan->timeout == 0 && autoscan->interval == 0)
+       autoscan->interval = 0;
+
+       if (autoscan->timeout == 0)
                return;
 
        g_source_remove(autoscan->timeout);
-
        autoscan->timeout = 0;
-       autoscan->interval = 0;
 
        connman_device_unref(device);
 }
@@ -893,7 +898,7 @@ static void wifi_remove(struct connman_device *device)
 
        remove_pending_wifi_device(wifi);
 
-       if (wifi->p2p_find_timeout) {
+       if (connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_P2P)) {
                g_source_remove(wifi->p2p_find_timeout);
                connman_device_unref(wifi->device);
        }
@@ -1209,7 +1214,7 @@ static int throw_wifi_scan(struct connman_device *device,
        if (wifi->tethering)
                return -EBUSY;
 
-       if (connman_device_get_scanning(device))
+       if (connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_WIFI))
                return -EALREADY;
 
        connman_device_ref(device);
@@ -1283,7 +1288,7 @@ static void scan_callback(int result, GSupplicantInterface *interface,
                return scan_callback(ret, interface, user_data);
        }
 
-       scanning = connman_device_get_scanning(device);
+       scanning = connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_WIFI);
 
        if (scanning) {
                connman_device_set_scanning(device,
@@ -1363,6 +1368,21 @@ static gboolean autoscan_timeout(gpointer data)
 
        throw_wifi_scan(wifi->device, scan_callback_hidden);
 
+       /*
+        * In case BackgroundScanning is disabled, interval will reach the
+        * limit exactly after the very first passive scanning. It allows
+        * to ensure at most one passive scan is performed in such cases.
+        */
+       if (!connman_setting_get_bool("BackgroundScanning") &&
+                                       interval == autoscan->limit) {
+               g_source_remove(autoscan->timeout);
+               autoscan->timeout = 0;
+
+               connman_device_unref(device);
+
+               return FALSE;
+       }
+
 set_interval:
        DBG("interval %d", interval);
 
@@ -1409,19 +1429,25 @@ static struct autoscan_params *parse_autoscan_params(const char *params)
        int limit;
        int base;
 
-       DBG("Emulating autoscan");
+       DBG("");
 
        list_params = g_strsplit(params, ":", 0);
        if (list_params == 0)
                return NULL;
 
-       if (g_strv_length(list_params) < 3) {
+       if (!g_strcmp0(list_params[0], "exponential") &&
+                               g_strv_length(list_params) == 3) {
+               base = atoi(list_params[1]);
+               limit = atoi(list_params[2]);
+       } else if (!g_strcmp0(list_params[0], "single") &&
+                               g_strv_length(list_params) == 2)
+               base = limit = atoi(list_params[1]);
+       else {
                g_strfreev(list_params);
                return NULL;
        }
 
-       base = atoi(list_params[1]);
-       limit = atoi(list_params[2]);
+       DBG("Setup %s autoscanning", list_params[0]);
 
        g_strfreev(list_params);
 
@@ -1440,10 +1466,37 @@ static struct autoscan_params *parse_autoscan_params(const char *params)
 
 static void setup_autoscan(struct wifi_data *wifi)
 {
-       if (!wifi->autoscan)
-               wifi->autoscan = parse_autoscan_params(AUTOSCAN_DEFAULT);
+       /*
+        * If BackgroundScanning is enabled, setup exponential
+        * autoscanning if it has not been previously done.
+        */
+       if (connman_setting_get_bool("BackgroundScanning")) {
+               wifi->autoscan = parse_autoscan_params(AUTOSCAN_EXPONENTIAL);
+               return;
+       }
 
-       start_autoscan(wifi->device);
+       /*
+        * On the contrary, if BackgroundScanning is disabled, update autoscan
+        * parameters based on the type of scanning that is being performed.
+        */
+       if (wifi->autoscan) {
+               g_free(wifi->autoscan);
+               wifi->autoscan = NULL;
+       }
+
+       switch (wifi->scanning_type) {
+       case WIFI_SCANNING_PASSIVE:
+               /* Do not setup autoscan. */
+               break;
+       case WIFI_SCANNING_ACTIVE:
+               /* Setup one single passive scan after active. */
+               wifi->autoscan = parse_autoscan_params(AUTOSCAN_SINGLE);
+               break;
+       case WIFI_SCANNING_UNKNOWN:
+               /* Setup autoscan in this case but we should never fall here. */
+               wifi->autoscan = parse_autoscan_params(AUTOSCAN_SINGLE);
+               break;
+       }
 }
 
 static void finalize_interface_creation(struct wifi_data *wifi)
@@ -1457,13 +1510,13 @@ static void finalize_interface_creation(struct wifi_data *wifi)
 
        connman_device_set_powered(wifi->device, true);
 
-       if (!connman_setting_get_bool("BackgroundScanning"))
-               return;
-
        if (wifi->p2p_device)
                return;
 
-       setup_autoscan(wifi);
+       if (!wifi->autoscan)
+               setup_autoscan(wifi);
+
+       start_autoscan(wifi->device);
 }
 
 static void interface_create_callback(int result,
@@ -1535,7 +1588,7 @@ static int wifi_disable(struct connman_device *device)
 
        stop_autoscan(device);
 
-       if (wifi->p2p_find_timeout) {
+       if (connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_P2P)) {
                g_source_remove(wifi->p2p_find_timeout);
                wifi->p2p_find_timeout = 0;
                connman_device_set_scanning(device, CONNMAN_SERVICE_TYPE_P2P, false);
@@ -1543,7 +1596,7 @@ static int wifi_disable(struct connman_device *device)
        }
 
        /* In case of a user scan, device is still referenced */
-       if (connman_device_get_scanning(device)) {
+       if (connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_WIFI)) {
                connman_device_set_scanning(device,
                                CONNMAN_SERVICE_TYPE_WIFI, false);
                connman_device_unref(wifi->device);
@@ -1560,15 +1613,15 @@ static int wifi_disable(struct connman_device *device)
 }
 
 struct last_connected {
-       GTimeVal modified;
+       struct timeval modified;
        gchar *ssid;
        int freq;
 };
 
 static gint sort_entry(gconstpointer a, gconstpointer b, gpointer user_data)
 {
-       GTimeVal *aval = (GTimeVal *)a;
-       GTimeVal *bval = (GTimeVal *)b;
+       struct timeval *aval = (struct timeval *)a;
+       struct timeval *bval = (struct timeval *)b;
 
        /* Note that the sort order is descending */
        if (aval->tv_sec < bval->tv_sec)
@@ -1595,7 +1648,7 @@ static int get_latest_connections(int max_ssids,
        GSequence *latest_list;
        struct last_connected *entry;
        GKeyFile *keyfile;
-       GTimeVal modified;
+       struct timeval modified;
        gchar **services;
        gchar *str;
        char *ssid;
@@ -1639,7 +1692,7 @@ static int get_latest_connections(int max_ssids,
                        g_key_file_free(keyfile);
                        continue;
                }
-               g_time_val_from_iso8601(str, &modified);
+               util_iso8601_to_timeval(str, &modified);
                g_free(str);
 
                ssid = g_key_file_get_string(keyfile,
@@ -1691,10 +1744,29 @@ static int get_latest_connections(int max_ssids,
        return num_ssids;
 }
 
+static void wifi_update_scanner_type(struct wifi_data *wifi,
+                                       enum wifi_scanning_type new_type)
+{
+       DBG("");
+
+       if (!wifi || wifi->scanning_type == new_type)
+               return;
+
+       wifi->scanning_type = new_type;
+
+       setup_autoscan(wifi);
+}
+
 static int wifi_scan_simple(struct connman_device *device)
 {
+       struct wifi_data *wifi = connman_device_get_data(device);
+
        reset_autoscan(device);
 
+       /* Distinguish between devices performing passive and active scanning */
+       if (wifi)
+               wifi_update_scanner_type(wifi, WIFI_SCANNING_PASSIVE);
+
        return throw_wifi_scan(device, scan_callback_hidden);
 }
 
@@ -1714,7 +1786,7 @@ static gboolean p2p_find_stop(gpointer data)
        connman_device_set_scanning(device, CONNMAN_SERVICE_TYPE_P2P, false);
 
        connman_device_unref(device);
-       reset_autoscan(device);
+       start_autoscan(device);
 
        return FALSE;
 }
@@ -1783,11 +1855,8 @@ static int p2p_find(struct connman_device *device)
  * Note that the hidden scan is only used when connecting to this specific
  * hidden AP first time. It is not used when system autoconnects to hidden AP.
  */
-static int wifi_scan(enum connman_service_type type,
-                       struct connman_device *device,
-                       const char *ssid, unsigned int ssid_len,
-                       const char *identity, const char* passphrase,
-                       const char *security, void *user_data)
+static int wifi_scan(struct connman_device *device,
+                       struct connman_device_scan_params *params)
 {
        struct wifi_data *wifi = connman_device_get_data(device);
        GSupplicantScanParams *scan_params = NULL;
@@ -1807,14 +1876,15 @@ static int wifi_scan(enum connman_service_type type,
        if (wifi->tethering)
                return -EBUSY;
 
-       if (type == CONNMAN_SERVICE_TYPE_P2P)
+       if (params->type == CONNMAN_SERVICE_TYPE_P2P)
                return p2p_find(device);
 
-       DBG("device %p wifi %p hidden ssid %s", device, wifi->interface, ssid);
+       DBG("device %p wifi %p hidden ssid %s", device, wifi->interface,
+               params->ssid);
 
-       scanning = connman_device_get_scanning(device);
+       scanning = connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_WIFI);
 
-       if (!ssid || ssid_len == 0 || ssid_len > 32) {
+       if (!params->ssid || params->ssid_len == 0 || params->ssid_len > 32) {
                if (scanning)
                        return -EALREADY;
 
@@ -1843,8 +1913,8 @@ static int wifi_scan(enum connman_service_type type,
                        return -ENOMEM;
                }
 
-               memcpy(scan_ssid->ssid, ssid, ssid_len);
-               scan_ssid->ssid_len = ssid_len;
+               memcpy(scan_ssid->ssid, params->ssid, params->ssid_len);
+               scan_ssid->ssid_len = params->ssid_len;
                scan_params->ssids = g_slist_prepend(scan_params->ssids,
                                                                scan_ssid);
                scan_params->num_ssids = 1;
@@ -1860,12 +1930,12 @@ static int wifi_scan(enum connman_service_type type,
                        wifi->hidden = NULL;
                }
 
-               memcpy(hidden->ssid, ssid, ssid_len);
-               hidden->ssid_len = ssid_len;
-               hidden->identity = g_strdup(identity);
-               hidden->passphrase = g_strdup(passphrase);
-               hidden->security = g_strdup(security);
-               hidden->user_data = user_data;
+               memcpy(hidden->ssid, params->ssid, params->ssid_len);
+               hidden->ssid_len = params->ssid_len;
+               hidden->identity = g_strdup(params->identity);
+               hidden->passphrase = g_strdup(params->passphrase);
+               hidden->security = g_strdup(params->security);
+               hidden->user_data = params->user_data;
                wifi->hidden = hidden;
 
                if (scanning) {
@@ -1879,7 +1949,7 @@ static int wifi_scan(enum connman_service_type type,
        } else if (wifi->connected) {
                g_supplicant_free_scan_params(scan_params);
                return wifi_scan_simple(device);
-       } else {
+       } else if (!params->force_full_scan) {
                ret = get_latest_connections(driver_max_ssids, scan_params);
                if (ret <= 0) {
                        g_supplicant_free_scan_params(scan_params);
@@ -1887,6 +1957,9 @@ static int wifi_scan(enum connman_service_type type,
                }
        }
 
+       /* Distinguish between devices performing passive and active scanning */
+       wifi_update_scanner_type(wifi, WIFI_SCANNING_ACTIVE);
+
        connman_device_ref(device);
 
        reset_autoscan(device);
@@ -1909,6 +1982,24 @@ static int wifi_scan(enum connman_service_type type,
        return ret;
 }
 
+static void wifi_stop_scan(enum connman_service_type type,
+                       struct connman_device *device)
+{
+       struct wifi_data *wifi = connman_device_get_data(device);
+
+       DBG("device %p wifi %p", device, wifi);
+
+       if (!wifi)
+               return;
+
+       if (type == CONNMAN_SERVICE_TYPE_P2P) {
+               if (connman_device_get_scanning(device, CONNMAN_SERVICE_TYPE_P2P)) {
+                       g_source_remove(wifi->p2p_find_timeout);
+                       p2p_find_stop(device);
+               }
+       }
+}
+
 static void wifi_regdom_callback(int result,
                                        const char *alpha2,
                                                void *user_data)
@@ -1948,6 +2039,7 @@ static struct connman_device_driver wifi_ng_driver = {
        .enable         = wifi_enable,
        .disable        = wifi_disable,
        .scan           = wifi_scan,
+       .stop_scan      = wifi_stop_scan,
        .set_regdom     = wifi_set_regdom,
 };
 
@@ -2138,10 +2230,9 @@ static void disconnect_callback(int result, GSupplicantInterface *interface,
                return;
        }
 
-       if (wifi->network) {
+       if (wifi->network && wifi->network != wifi->pending_network)
                connman_network_set_connected(wifi->network, false);
-               wifi->network = NULL;
-       }
+       wifi->network = NULL;
 
        wifi->disconnecting = false;
        wifi->connected = false;
@@ -2370,17 +2461,20 @@ static void interface_state(GSupplicantInterface *interface)
        if (!wifi)
                return;
 
+       device = wifi->device;
+       if (!device)
+               return;
+
        if (state == G_SUPPLICANT_STATE_COMPLETED) {
                if (wifi->tethering_param) {
                        g_free(wifi->tethering_param->ssid);
                        g_free(wifi->tethering_param);
                        wifi->tethering_param = NULL;
                }
-       }
 
-       device = wifi->device;
-       if (!device)
-               return;
+               if (wifi->tethering)
+                       stop_autoscan(device);
+       }
 
        if (g_supplicant_interface_get_ready(interface) &&
                                        !wifi->interface_ready) {
@@ -2461,8 +2555,11 @@ static void interface_state(GSupplicantInterface *interface)
                default:
                        break;
                }
-               connman_network_set_connected(network, false);
-               connman_network_set_associating(network, false);
+
+               if (network != wifi->pending_network) {
+                       connman_network_set_connected(network, false);
+                       connman_network_set_associating(network, false);
+               }
                wifi->disconnecting = false;
 
                start_autoscan(device);
@@ -2635,8 +2732,6 @@ static void ap_create_fail(GSupplicantInterface *interface)
                g_free(wifi->tethering_param);
                wifi->tethering_param = NULL;
        }
-
-       return;
 }
 
 static unsigned char calculate_strength(GSupplicantNetwork *supplicant_network)
@@ -2714,6 +2809,8 @@ static void network_added(GSupplicantNetwork *supplicant_network)
        connman_network_set_strength(network,
                                calculate_strength(supplicant_network));
        connman_network_set_bool(network, "WiFi.WPS", wps);
+       connman_network_set_bool(network, "WiFi.WPSAdvertising",
+                               wps_advertizing);
 
        if (wps) {
                /* Is AP advertizing for WPS association?
@@ -2780,6 +2877,7 @@ static void network_changed(GSupplicantNetwork *network, const char *property)
        struct wifi_data *wifi;
        const char *name, *identifier;
        struct connman_network *connman_network;
+       bool update_needed;
 
        interface = g_supplicant_network_get_interface(network);
        wifi = g_supplicant_interface_get_data(interface);
@@ -2795,11 +2893,42 @@ static void network_changed(GSupplicantNetwork *network, const char *property)
        if (!connman_network)
                return;
 
-       if (g_str_equal(property, "Signal")) {
-              connman_network_set_strength(connman_network,
+       if (g_str_equal(property, "WPSCapabilities")) {
+               bool wps;
+               bool wps_pbc;
+               bool wps_ready;
+               bool wps_advertizing;
+
+               wps = g_supplicant_network_get_wps(network);
+               wps_pbc = g_supplicant_network_is_wps_pbc(network);
+               wps_ready = g_supplicant_network_is_wps_active(network);
+               wps_advertizing =
+                       g_supplicant_network_is_wps_advertizing(network);
+
+               connman_network_set_bool(connman_network, "WiFi.WPS", wps);
+               connman_network_set_bool(connman_network,
+                               "WiFi.WPSAdvertising", wps_advertizing);
+
+               if (wps) {
+                       /*
+                        * Is AP advertizing for WPS association?
+                        * If so, we decide to use WPS by default
+                        */
+                       if (wps_ready && wps_pbc && wps_advertizing)
+                               connman_network_set_bool(connman_network,
+                                                       "WiFi.UseWPS", true);
+               }
+
+               update_needed = true;
+       } else if (g_str_equal(property, "Signal")) {
+               connman_network_set_strength(connman_network,
                                        calculate_strength(network));
-              connman_network_update(connman_network);
-       }
+               update_needed = true;
+       } else
+               update_needed = false;
+
+       if (update_needed)
+               connman_network_update(connman_network);
 }
 
 static void network_associated(GSupplicantNetwork *network)
@@ -2819,6 +2948,10 @@ static void network_associated(GSupplicantNetwork *network)
        if (!wifi)
                return;
 
+       /* P2P networks must not be treated as WiFi networks */
+       if (wifi->p2p_connecting || wifi->p2p_device)
+               return;
+
        identifier = g_supplicant_network_get_identifier(network);
 
        connman_network = connman_device_get_network(wifi->device, identifier);
@@ -2853,6 +2986,32 @@ static void network_associated(GSupplicantNetwork *network)
        interface_state(interface);
 }
 
+static void sta_authorized(GSupplicantInterface *interface,
+                                       const char *addr)
+{
+       struct wifi_data *wifi = g_supplicant_interface_get_data(interface);
+
+       DBG("wifi %p station %s authorized", wifi, addr);
+
+       if (!wifi || !wifi->tethering)
+               return;
+
+       __connman_tethering_client_register(addr);
+}
+
+static void sta_deauthorized(GSupplicantInterface *interface,
+                                       const char *addr)
+{
+       struct wifi_data *wifi = g_supplicant_interface_get_data(interface);
+
+       DBG("wifi %p station %s deauthorized", wifi, addr);
+
+       if (!wifi || !wifi->tethering)
+               return;
+
+       __connman_tethering_client_unregister(addr);
+}
+
 static void apply_peer_services(GSupplicantPeer *peer,
                                struct connman_peer *connman_peer)
 {
@@ -3073,6 +3232,8 @@ static const GSupplicantCallbacks callbacks = {
        .network_removed        = network_removed,
        .network_changed        = network_changed,
        .network_associated     = network_associated,
+       .sta_authorized         = sta_authorized,
+       .sta_deauthorized       = sta_deauthorized,
        .peer_found             = peer_found,
        .peer_lost              = peer_lost,
        .peer_changed           = peer_changed,
@@ -3197,15 +3358,15 @@ static void sta_remove_callback(int result,
                info->wifi->tethering = false;
                connman_technology_tethering_notify(info->technology, false);
 
-               g_free(info->ifname);
-               g_free(info->ssid);
-               g_free(info);
-
                if (info->wifi->ap_supported == WIFI_AP_SUPPORTED) {
                        g_free(info->wifi->tethering_param->ssid);
                        g_free(info->wifi->tethering_param);
                        info->wifi->tethering_param = NULL;
                }
+
+               g_free(info->ifname);
+               g_free(info->ssid);
+               g_free(info);
                return;
        }