/**
* wpa_supplicant_dbus_notify_scan_results - Send a scan results signal
* @wpa_s: %wpa_supplicant network interface data
* Returns: 0 on success, -1 on failure
*
* Notify listeners that this interface has updated scan results.
*/
void wpa_supplicant_dbus_notify_scan_results(struct wpa_supplicant *wpa_s)
{
struct ctrl_iface_dbus_priv *iface = wpa_s->global->dbus_ctrl_iface;
DBusMessage *_signal;
const char *path;
/* Do nothing if the control interface is not turned on */
if (iface == NULL)
return;
path = wpa_supplicant_get_dbus_path(wpa_s);
if (path == NULL) {
perror("wpa_supplicant_dbus_notify_scan_results[dbus]: "
"interface didn't have a dbus path");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_scan_results[dbus]: "
"interface didn't have a dbus path; can't send "
"scan result signal.");
return;
}
_signal = dbus_message_new_signal(path, WPAS_DBUS_IFACE_INTERFACE,
"ScanResultsAvailable");
if (_signal == NULL) {
perror("wpa_supplicant_dbus_notify_scan_results[dbus]: "
"couldn't create dbus signal; likely out of memory");
wpa_printf(MSG_ERROR, "dbus control interface: not enough "
"memory to send scan results signal.");
return;
}
dbus_connection_send(iface->con, _signal, NULL);
dbus_message_unref(_signal);
}
/**
* wpas_dbus_iface_scan_results - Get the results of a recent scan request
* @message: Pointer to incoming dbus message
* @wpa_s: wpa_supplicant structure for a network interface
* Returns: a dbus message containing a dbus array of objects paths, or returns
* a dbus error message if not scan results could be found
*
* Handler function for "scanResults" method call of a network device. Returns
* a dbus message containing the object paths of wireless networks found.
*/
DBusMessage * wpas_dbus_iface_scan_results(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
DBusMessage *reply = NULL;
DBusMessageIter iter;
DBusMessageIter sub_iter;
size_t i;
/* Ensure we've actually got scan results to return */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0) {
reply = dbus_message_new_error(message, WPAS_ERROR_SCAN_ERROR,
"An error ocurred getting scan "
"results.");
goto out;
}
/* Create and initialize the return message */
reply = dbus_message_new_method_return(message);
dbus_message_iter_init_append(reply, &iter);
dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY,
DBUS_TYPE_OBJECT_PATH_AS_STRING,
&sub_iter);
/* Loop through scan results and append each result's object path */
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *res = wpa_s->scan_res->res[i];
char *path;
path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
if (path == NULL) {
perror("wpas_dbus_iface_scan_results[dbus]: out of "
"memory.");
wpa_printf(MSG_ERROR, "dbus control interface: not "
"enough memory to send scan results "
"signal.");
break;
}
/* Construct the object path for this network. Note that ':'
* is not a valid character in dbus object paths.
*/
snprintf(path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_BSSIDS_PART "/"
WPAS_DBUS_BSSID_FORMAT,
wpa_supplicant_get_dbus_path(wpa_s),
MAC2STR(res->bssid));
dbus_message_iter_append_basic(&sub_iter,
DBUS_TYPE_OBJECT_PATH, &path);
free(path);
}
dbus_message_iter_close_container(&iter, &sub_iter);
out:
return reply;
}
/**
* wpas_dbus_iface_remove_network - Remove a configured network
* @message: Pointer to incoming dbus message
* @wpa_s: wpa_supplicant structure for a network interface
* Returns: A dbus message containing a UINT32 indicating success (1) or
* failure (0)
*
* Handler function for "removeNetwork" method call of a network interface.
*/
DBusMessage * wpas_dbus_iface_remove_network(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
DBusMessage *reply = NULL;
const char *op;
char *iface = NULL, *net_id = NULL;
int id;
struct wpa_ssid *ssid;
if (!dbus_message_get_args(message, NULL,
DBUS_TYPE_OBJECT_PATH, &op,
DBUS_TYPE_INVALID)) {
reply = wpas_dbus_new_invalid_opts_error(message, NULL);
goto out;
}
/* Extract the network ID */
iface = wpas_dbus_decompose_object_path(op, &net_id, NULL);
if (iface == NULL) {
reply = wpas_dbus_new_invalid_network_error(message);
goto out;
}
/* Ensure the network is actually a child of this interface */
if (strcmp(iface, wpa_supplicant_get_dbus_path(wpa_s)) != 0) {
reply = wpas_dbus_new_invalid_network_error(message);
goto out;
}
id = strtoul(net_id, NULL, 10);
ssid = wpa_config_get_network(wpa_s->conf, id);
if (ssid == NULL) {
reply = wpas_dbus_new_invalid_network_error(message);
goto out;
}
if (wpa_config_remove_network(wpa_s->conf, id) < 0) {
reply = dbus_message_new_error(message,
WPAS_ERROR_REMOVE_NETWORK_ERROR,
"error removing the specified "
"on this interface.");
goto out;
}
if (ssid == wpa_s->current_ssid)
wpa_supplicant_disassociate(wpa_s, WLAN_REASON_DEAUTH_LEAVING);
reply = wpas_dbus_new_success_reply(message);
out:
free(iface);
free(net_id);
return reply;
}
/**
* wpas_dbus_iface_add_network - Add a new configured network
* @message: Pointer to incoming dbus message
* @wpa_s: wpa_supplicant structure for a network interface
* Returns: A dbus message containing the object path of the new network
*
* Handler function for "addNetwork" method call of a network interface.
*/
DBusMessage * wpas_dbus_iface_add_network(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
DBusMessage *reply = NULL;
struct wpa_ssid *ssid;
char *path = NULL;
path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
if (path == NULL) {
perror("wpas_dbus_iface_scan_results[dbus]: out of "
"memory.");
wpa_printf(MSG_ERROR, "dbus control interface: not "
"enough memory to send scan results "
"signal.");
goto out;
}
ssid = wpa_config_add_network(wpa_s->conf);
if (ssid == NULL) {
reply = dbus_message_new_error(message,
WPAS_ERROR_ADD_NETWORK_ERROR,
"wpa_supplicant could not add "
"a network on this interface.");
goto out;
}
ssid->disabled = 1;
wpa_config_set_network_defaults(ssid);
/* Construct the object path for this network. */
snprintf(path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/" WPAS_DBUS_NETWORKS_PART "/%d",
wpa_supplicant_get_dbus_path(wpa_s),
ssid->id);
reply = dbus_message_new_method_return(message);
dbus_message_append_args(reply, DBUS_TYPE_OBJECT_PATH,
&path, DBUS_TYPE_INVALID);
out:
free(path);
return reply;
}
/**
* wpas_dbus_unregister_iface - Unregister an interface from dbus
* @wpa_s: wpa_supplicant interface structure
* Returns: 0 on success, -1 on failure
*
* Unregisters the interface with dbus
*/
int wpas_dbus_unregister_iface(struct wpa_supplicant *wpa_s)
{
struct ctrl_iface_dbus_priv *ctrl_iface =
wpa_s->global->dbus_ctrl_iface;
DBusConnection *con;
const char *path;
/* Do nothing if the control interface is not turned on */
if (ctrl_iface == NULL)
return 0;
con = ctrl_iface->con;
path = wpa_supplicant_get_dbus_path(wpa_s);
if (!dbus_connection_unregister_object_path(con, path))
return -1;
free(wpa_s->dbus_path);
wpa_s->dbus_path = NULL;
return 0;
}
/**
* wpas_dbus_global_get_interface - Get the object path for an interface name
* @message: Pointer to incoming dbus message
* @global: %wpa_supplicant global data structure
* Returns: The object path of the interface object,
* or a dbus error message with more information
*
* Handler function for "getInterface" method call. Handles requests
* by dbus clients for the object path of an specific network interface.
*/
DBusMessage * wpas_dbus_global_get_interface(DBusMessage *message,
struct wpa_global *global)
{
DBusMessage *reply = NULL;
const char *ifname;
const char *path;
struct wpa_supplicant *wpa_s;
if (!dbus_message_get_args(message, NULL,
DBUS_TYPE_STRING, &ifname,
DBUS_TYPE_INVALID)) {
reply = wpas_dbus_new_invalid_opts_error(message, NULL);
goto out;
}
wpa_s = wpa_supplicant_get_iface(global, ifname);
if (wpa_s == NULL) {
reply = wpas_dbus_new_invalid_iface_error(message);
goto out;
}
path = wpa_supplicant_get_dbus_path(wpa_s);
if (path == NULL) {
reply = dbus_message_new_error(message,
WPAS_ERROR_INTERNAL_ERROR,
"an internal error occurred "
"getting the interface.");
goto out;
}
reply = dbus_message_new_method_return(message);
dbus_message_append_args(reply,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID);
out:
return reply;
}
/**
* wpa_supplicant_dbus_notify_state_change - Send a state change signal
* @wpa_s: %wpa_supplicant network interface data
* @new_state: new state wpa_supplicant is entering
* @old_state: old state wpa_supplicant is leaving
* Returns: 0 on success, -1 on failure
*
* Notify listeners that wpa_supplicant has changed state
*/
void wpa_supplicant_dbus_notify_state_change(struct wpa_supplicant *wpa_s,
wpa_states new_state,
wpa_states old_state)
{
struct ctrl_iface_dbus_priv *iface;
DBusMessage *_signal = NULL;
const char *path;
const char *new_state_str, *old_state_str;
/* Do nothing if the control interface is not turned on */
if (wpa_s->global == NULL)
return;
iface = wpa_s->global->dbus_ctrl_iface;
if (iface == NULL)
return;
/* Only send signal if state really changed */
if (new_state == old_state)
return;
path = wpa_supplicant_get_dbus_path(wpa_s);
if (path == NULL) {
perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
"interface didn't have a dbus path");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_state_change[dbus]: "
"interface didn't have a dbus path; can't send "
"signal.");
return;
}
_signal = dbus_message_new_signal(path, WPAS_DBUS_IFACE_INTERFACE,
"StateChange");
if (_signal == NULL) {
perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
"couldn't create dbus signal; likely out of memory");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_state_change[dbus]: "
"couldn't create dbus signal; likely out of "
"memory.");
return;
}
new_state_str = wpa_supplicant_state_txt(new_state);
old_state_str = wpa_supplicant_state_txt(old_state);
if (new_state_str == NULL || old_state_str == NULL) {
perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
"couldn't convert state strings");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_state_change[dbus]: "
"couldn't convert state strings.");
goto out;
}
if (!dbus_message_append_args(_signal,
DBUS_TYPE_STRING, &new_state_str,
DBUS_TYPE_STRING, &old_state_str,
DBUS_TYPE_INVALID)) {
perror("wpa_supplicant_dbus_notify_state_change[dbus]: "
"not enough memory to construct state change signal.");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_state_change[dbus]: "
"not enough memory to construct state change "
"signal.");
goto out;
}
dbus_connection_send(iface->con, _signal, NULL);
out:
dbus_message_unref(_signal);
}
/**
* wpas_dbus_global_add_interface - Request registration of a network interface
* @message: Pointer to incoming dbus message
* @global: %wpa_supplicant global data structure
* Returns: The object path of the new interface object,
* or a dbus error message with more information
*
* Handler function for "addInterface" method call. Handles requests
* by dbus clients to register a network interface that wpa_supplicant
* will manage.
*/
DBusMessage * wpas_dbus_global_add_interface(DBusMessage *message,
struct wpa_global *global)
{
struct wpa_interface iface;
char *ifname = NULL;
DBusMessage *reply = NULL;
DBusMessageIter iter;
memset(&iface, 0, sizeof(iface));
dbus_message_iter_init(message, &iter);
/* First argument: interface name (DBUS_TYPE_STRING)
* Required; must be non-zero length
*/
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
goto error;
dbus_message_iter_get_basic(&iter, &ifname);
if (!strlen(ifname))
goto error;
iface.ifname = ifname;
/* Second argument: dict of options */
if (dbus_message_iter_next(&iter)) {
DBusMessageIter iter_dict;
struct wpa_dbus_dict_entry entry;
if (!wpa_dbus_dict_open_read(&iter, &iter_dict))
goto error;
while (wpa_dbus_dict_has_dict_entry(&iter_dict)) {
if (!wpa_dbus_dict_get_entry(&iter_dict, &entry))
goto error;
if (!strcmp(entry.key, "driver") &&
(entry.type == DBUS_TYPE_STRING)) {
iface.driver = strdup(entry.str_value);
if (iface.driver == NULL)
goto error;
} else if (!strcmp(entry.key, "driver-params") &&
(entry.type == DBUS_TYPE_STRING)) {
iface.driver_param = strdup(entry.str_value);
if (iface.driver_param == NULL)
goto error;
} else if (!strcmp(entry.key, "config-file") &&
(entry.type == DBUS_TYPE_STRING)) {
iface.confname = strdup(entry.str_value);
if (iface.confname == NULL)
goto error;
} else if (!strcmp(entry.key, "bridge-ifname") &&
(entry.type == DBUS_TYPE_STRING)) {
iface.bridge_ifname = strdup(entry.str_value);
if (iface.bridge_ifname == NULL)
goto error;
} else {
wpa_dbus_dict_entry_clear(&entry);
goto error;
}
wpa_dbus_dict_entry_clear(&entry);
}
}
/*
* Try to get the wpa_supplicant record for this iface, return
* an error if we already control it.
*/
if (wpa_supplicant_get_iface(global, iface.ifname) != NULL) {
reply = dbus_message_new_error(message,
WPAS_ERROR_EXISTS_ERROR,
"wpa_supplicant already "
"controls this interface.");
} else {
struct wpa_supplicant *wpa_s;
/* Otherwise, have wpa_supplicant attach to it. */
if ((wpa_s = wpa_supplicant_add_iface(global, &iface))) {
const char *path = wpa_supplicant_get_dbus_path(wpa_s);
reply = dbus_message_new_method_return(message);
dbus_message_append_args(reply, DBUS_TYPE_OBJECT_PATH,
&path, DBUS_TYPE_INVALID);
} else {
reply = dbus_message_new_error(message,
WPAS_ERROR_ADD_ERROR,
"wpa_supplicant "
"couldn't grab this "
"interface.");
}
}
wpas_dbus_free_wpa_interface(&iface);
return reply;
error:
wpas_dbus_free_wpa_interface(&iface);
return wpas_dbus_new_invalid_opts_error(message, NULL);
}
/**
* wpas_dbus_iface_select_network - Attempt association with a configured network
* @message: Pointer to incoming dbus message
* @wpa_s: wpa_supplicant structure for a network interface
* Returns: A dbus message containing a UINT32 indicating success (1) or
* failure (0)
*
* Handler function for "selectNetwork" method call of network interface.
*/
DBusMessage * wpas_dbus_iface_select_network(DBusMessage *message,
struct wpa_supplicant *wpa_s)
{
DBusMessage *reply = NULL;
const char *op;
struct wpa_ssid *ssid;
char *iface_obj_path = NULL;
char *network = NULL;
if (strlen(dbus_message_get_signature(message)) == 0) {
/* Any network */
ssid = wpa_s->conf->ssid;
while (ssid) {
ssid->disabled = 0;
ssid = ssid->next;
}
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
} else {
const char *obj_path;
int nid;
if (!dbus_message_get_args(message, NULL,
DBUS_TYPE_OBJECT_PATH, &op,
DBUS_TYPE_INVALID)) {
reply = wpas_dbus_new_invalid_opts_error(message,
NULL);
goto out;
}
/* Extract the network number */
iface_obj_path = wpas_dbus_decompose_object_path(op,
&network,
NULL);
if (iface_obj_path == NULL) {
reply = wpas_dbus_new_invalid_iface_error(message);
goto out;
}
/* Ensure the object path really points to this interface */
obj_path = wpa_supplicant_get_dbus_path(wpa_s);
if (strcmp(iface_obj_path, obj_path) != 0) {
reply = wpas_dbus_new_invalid_network_error(message);
goto out;
}
nid = strtoul(network, NULL, 10);
if (errno == EINVAL) {
reply = wpas_dbus_new_invalid_network_error(message);
goto out;
}
ssid = wpa_config_get_network(wpa_s->conf, nid);
if (ssid == NULL) {
reply = wpas_dbus_new_invalid_network_error(message);
goto out;
}
/* Finally, associate with the network */
if (ssid != wpa_s->current_ssid && wpa_s->current_ssid)
wpa_supplicant_disassociate(
wpa_s, WLAN_REASON_DEAUTH_LEAVING);
/* Mark all other networks disabled and trigger reassociation
*/
ssid = wpa_s->conf->ssid;
while (ssid) {
ssid->disabled = (nid != ssid->id);
ssid = ssid->next;
}
wpa_s->disconnected = 0;
wpa_s->reassociate = 1;
wpa_supplicant_req_scan(wpa_s, 0, 0);
}
reply = wpas_dbus_new_success_reply(message);
out:
free(iface_obj_path);
free(network);
return reply;
}
