hostap/wpa_supplicant/ctrl_iface_dbus.c
Jaime Soriano Pastor e8fa6039f6 WPS methods exported over DBus
I've exported the methods wpsPbc, wpsReg and wpsPin (patch attached),
so wpa_supplicant should be able to connect with WPS using the dbus
interface. I couldn't test it well because the problem seems to be in
my wireless card, a Broadcom BCM4328. At least it seems to do the same
using both interfaces. With ndiswrapper driver the "wpsie" entry
(thanks Dan!) didn't appear, and with the Broadcom wl driver it
appears but I cannot associate using WPS.
2009-05-06 13:23:41 +03:00

1127 lines
32 KiB
C

/*
* WPA Supplicant / dbus-based control interface
* Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "eloop.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "drivers/driver.h"
#include "wps/wps.h"
#include "ctrl_iface_dbus.h"
#include "ctrl_iface_dbus_handlers.h"
#define _DBUS_VERSION (DBUS_VERSION_MAJOR << 8 | DBUS_VERSION_MINOR)
#define DBUS_VER(major, minor) ((major) << 8 | (minor))
#if _DBUS_VERSION < DBUS_VER(1,1)
#define dbus_watch_get_unix_fd dbus_watch_get_fd
#endif
struct ctrl_iface_dbus_priv {
DBusConnection *con;
int should_dispatch;
struct wpa_global *global;
u32 next_objid;
};
static void process_watch(struct ctrl_iface_dbus_priv *iface,
DBusWatch *watch, eloop_event_type type)
{
dbus_connection_ref(iface->con);
iface->should_dispatch = 0;
if (type == EVENT_TYPE_READ)
dbus_watch_handle(watch, DBUS_WATCH_READABLE);
else if (type == EVENT_TYPE_WRITE)
dbus_watch_handle(watch, DBUS_WATCH_WRITABLE);
else if (type == EVENT_TYPE_EXCEPTION)
dbus_watch_handle(watch, DBUS_WATCH_ERROR);
if (iface->should_dispatch) {
while (dbus_connection_get_dispatch_status(iface->con) ==
DBUS_DISPATCH_DATA_REMAINS)
dbus_connection_dispatch(iface->con);
iface->should_dispatch = 0;
}
dbus_connection_unref(iface->con);
}
static void process_watch_exception(int sock, void *eloop_ctx, void *sock_ctx)
{
process_watch(eloop_ctx, sock_ctx, EVENT_TYPE_EXCEPTION);
}
static void process_watch_read(int sock, void *eloop_ctx, void *sock_ctx)
{
process_watch(eloop_ctx, sock_ctx, EVENT_TYPE_READ);
}
static void process_watch_write(int sock, void *eloop_ctx, void *sock_ctx)
{
process_watch(eloop_ctx, sock_ctx, EVENT_TYPE_WRITE);
}
static void connection_setup_add_watch(struct ctrl_iface_dbus_priv *iface,
DBusWatch *watch)
{
unsigned int flags;
int fd;
if (!dbus_watch_get_enabled(watch))
return;
flags = dbus_watch_get_flags(watch);
fd = dbus_watch_get_unix_fd(watch);
eloop_register_sock(fd, EVENT_TYPE_EXCEPTION, process_watch_exception,
iface, watch);
if (flags & DBUS_WATCH_READABLE) {
eloop_register_sock(fd, EVENT_TYPE_READ, process_watch_read,
iface, watch);
}
if (flags & DBUS_WATCH_WRITABLE) {
eloop_register_sock(fd, EVENT_TYPE_WRITE, process_watch_write,
iface, watch);
}
dbus_watch_set_data(watch, iface, NULL);
}
static void connection_setup_remove_watch(struct ctrl_iface_dbus_priv *iface,
DBusWatch *watch)
{
unsigned int flags;
int fd;
flags = dbus_watch_get_flags(watch);
fd = dbus_watch_get_unix_fd(watch);
eloop_unregister_sock(fd, EVENT_TYPE_EXCEPTION);
if (flags & DBUS_WATCH_READABLE)
eloop_unregister_sock(fd, EVENT_TYPE_READ);
if (flags & DBUS_WATCH_WRITABLE)
eloop_unregister_sock(fd, EVENT_TYPE_WRITE);
dbus_watch_set_data(watch, NULL, NULL);
}
static dbus_bool_t add_watch(DBusWatch *watch, void *data)
{
connection_setup_add_watch(data, watch);
return TRUE;
}
static void remove_watch(DBusWatch *watch, void *data)
{
connection_setup_remove_watch(data, watch);
}
static void watch_toggled(DBusWatch *watch, void *data)
{
if (dbus_watch_get_enabled(watch))
add_watch(watch, data);
else
remove_watch(watch, data);
}
static void process_timeout(void *eloop_ctx, void *sock_ctx)
{
DBusTimeout *timeout = sock_ctx;
dbus_timeout_handle(timeout);
}
static void connection_setup_add_timeout(struct ctrl_iface_dbus_priv *iface,
DBusTimeout *timeout)
{
if (!dbus_timeout_get_enabled(timeout))
return;
eloop_register_timeout(0, dbus_timeout_get_interval(timeout) * 1000,
process_timeout, iface, timeout);
dbus_timeout_set_data(timeout, iface, NULL);
}
static void connection_setup_remove_timeout(struct ctrl_iface_dbus_priv *iface,
DBusTimeout *timeout)
{
eloop_cancel_timeout(process_timeout, iface, timeout);
dbus_timeout_set_data(timeout, NULL, NULL);
}
static dbus_bool_t add_timeout(DBusTimeout *timeout, void *data)
{
if (!dbus_timeout_get_enabled(timeout))
return TRUE;
connection_setup_add_timeout(data, timeout);
return TRUE;
}
static void remove_timeout(DBusTimeout *timeout, void *data)
{
connection_setup_remove_timeout(data, timeout);
}
static void timeout_toggled(DBusTimeout *timeout, void *data)
{
if (dbus_timeout_get_enabled(timeout))
add_timeout(timeout, data);
else
remove_timeout(timeout, data);
}
static void process_wakeup_main(int sig, void *eloop_ctx, void *signal_ctx)
{
struct ctrl_iface_dbus_priv *iface = signal_ctx;
if (sig != SIGPOLL || !iface->con)
return;
if (dbus_connection_get_dispatch_status(iface->con) !=
DBUS_DISPATCH_DATA_REMAINS)
return;
/* Only dispatch once - we do not want to starve other events */
dbus_connection_ref(iface->con);
dbus_connection_dispatch(iface->con);
dbus_connection_unref(iface->con);
}
/**
* wakeup_main - Attempt to wake our mainloop up
* @data: dbus control interface private data
*
* Try to wake up the main eloop so it will process
* dbus events that may have happened.
*/
static void wakeup_main(void *data)
{
struct ctrl_iface_dbus_priv *iface = data;
/* Use SIGPOLL to break out of the eloop select() */
raise(SIGPOLL);
iface->should_dispatch = 1;
}
/**
* connection_setup_wakeup_main - Tell dbus about our wakeup_main function
* @iface: dbus control interface private data
* Returns: 0 on success, -1 on failure
*
* Register our wakeup_main handler with dbus
*/
static int connection_setup_wakeup_main(struct ctrl_iface_dbus_priv *iface)
{
if (eloop_register_signal(SIGPOLL, process_wakeup_main, iface))
return -1;
dbus_connection_set_wakeup_main_function(iface->con, wakeup_main,
iface, NULL);
return 0;
}
/**
* wpa_supplicant_dbus_next_objid - Return next available object id
* @iface: dbus control interface private data
* Returns: Object id
*/
u32 wpa_supplicant_dbus_next_objid (struct ctrl_iface_dbus_priv *iface)
{
return iface->next_objid++;
}
/**
* wpas_dbus_decompose_object_path - Decompose an interface object path into parts
* @path: The dbus object path
* @network: (out) the configured network this object path refers to, if any
* @bssid: (out) the scanned bssid this object path refers to, if any
* Returns: The object path of the network interface this path refers to
*
* For a given object path, decomposes the object path into object id, network,
* and BSSID parts, if those parts exist.
*/
char * wpas_dbus_decompose_object_path(const char *path, char **network,
char **bssid)
{
const unsigned int dev_path_prefix_len =
strlen(WPAS_DBUS_PATH_INTERFACES "/");
char *obj_path_only;
char *next_sep;
/* Be a bit paranoid about path */
if (!path || strncmp(path, WPAS_DBUS_PATH_INTERFACES "/",
dev_path_prefix_len))
return NULL;
/* Ensure there's something at the end of the path */
if ((path + dev_path_prefix_len)[0] == '\0')
return NULL;
obj_path_only = strdup(path);
if (obj_path_only == NULL)
return NULL;
next_sep = strchr(obj_path_only + dev_path_prefix_len, '/');
if (next_sep != NULL) {
const char *net_part = strstr(next_sep,
WPAS_DBUS_NETWORKS_PART "/");
const char *bssid_part = strstr(next_sep,
WPAS_DBUS_BSSIDS_PART "/");
if (network && net_part) {
/* Deal with a request for a configured network */
const char *net_name = net_part +
strlen(WPAS_DBUS_NETWORKS_PART "/");
*network = NULL;
if (strlen(net_name))
*network = strdup(net_name);
} else if (bssid && bssid_part) {
/* Deal with a request for a scanned BSSID */
const char *bssid_name = bssid_part +
strlen(WPAS_DBUS_BSSIDS_PART "/");
if (strlen(bssid_name))
*bssid = strdup(bssid_name);
else
*bssid = NULL;
}
/* Cut off interface object path before "/" */
*next_sep = '\0';
}
return obj_path_only;
}
/**
* wpas_dbus_new_invalid_iface_error - Return a new invalid interface error message
* @message: Pointer to incoming dbus message this error refers to
* Returns: A dbus error message
*
* Convenience function to create and return an invalid interface error
*/
DBusMessage * wpas_dbus_new_invalid_iface_error(DBusMessage *message)
{
return dbus_message_new_error(message, WPAS_ERROR_INVALID_IFACE,
"wpa_supplicant knows nothing about "
"this interface.");
}
/**
* wpas_dbus_new_invalid_network_error - Return a new invalid network error message
* @message: Pointer to incoming dbus message this error refers to
* Returns: a dbus error message
*
* Convenience function to create and return an invalid network error
*/
DBusMessage * wpas_dbus_new_invalid_network_error(DBusMessage *message)
{
return dbus_message_new_error(message, WPAS_ERROR_INVALID_NETWORK,
"The requested network does not exist.");
}
/**
* wpas_dbus_new_invalid_bssid_error - Return a new invalid bssid error message
* @message: Pointer to incoming dbus message this error refers to
* Returns: a dbus error message
*
* Convenience function to create and return an invalid bssid error
*/
static DBusMessage * wpas_dbus_new_invalid_bssid_error(DBusMessage *message)
{
return dbus_message_new_error(message, WPAS_ERROR_INVALID_BSSID,
"The BSSID requested was invalid.");
}
/**
* wpas_dispatch_network_method - dispatch messages for configured networks
* @message: the incoming dbus message
* @wpa_s: a network interface's data
* @network_id: id of the configured network we're interested in
* Returns: a reply dbus message, or a dbus error message
*
* This function dispatches all incoming dbus messages for configured networks.
*/
static DBusMessage * wpas_dispatch_network_method(DBusMessage *message,
struct wpa_supplicant *wpa_s,
int network_id)
{
DBusMessage *reply = NULL;
const char *method = dbus_message_get_member(message);
struct wpa_ssid *ssid;
ssid = wpa_config_get_network(wpa_s->conf, network_id);
if (ssid == NULL)
return wpas_dbus_new_invalid_network_error(message);
if (!strcmp(method, "set"))
reply = wpas_dbus_iface_set_network(message, wpa_s, ssid);
else if (!strcmp(method, "enable"))
reply = wpas_dbus_iface_enable_network(message, wpa_s, ssid);
else if (!strcmp(method, "disable"))
reply = wpas_dbus_iface_disable_network(message, wpa_s, ssid);
return reply;
}
/**
* wpas_dispatch_bssid_method - dispatch messages for scanned networks
* @message: the incoming dbus message
* @wpa_s: a network interface's data
* @bssid: bssid of the scanned network we're interested in
* Returns: a reply dbus message, or a dbus error message
*
* This function dispatches all incoming dbus messages for scanned networks.
*/
static DBusMessage * wpas_dispatch_bssid_method(DBusMessage *message,
struct wpa_supplicant *wpa_s,
const char *bssid)
{
DBusMessage *reply = NULL;
const char *method = dbus_message_get_member(message);
struct wpa_scan_res *res = NULL;
size_t i;
/* Ensure we actually have scan data */
if (wpa_s->scan_res == NULL &&
wpa_supplicant_get_scan_results(wpa_s) < 0) {
reply = wpas_dbus_new_invalid_bssid_error(message);
goto out;
}
/* Find the bssid's scan data */
for (i = 0; i < wpa_s->scan_res->num; i++) {
struct wpa_scan_res *search_res = wpa_s->scan_res->res[i];
char mac_str[18];
memset(mac_str, 0, sizeof(mac_str));
snprintf(mac_str, sizeof(mac_str) - 1, WPAS_DBUS_BSSID_FORMAT,
MAC2STR(search_res->bssid));
if (!strcmp(bssid, mac_str)) {
res = search_res;
break;
}
}
if (!res) {
reply = wpas_dbus_new_invalid_bssid_error(message);
goto out;
}
/* Dispatch the method call against the scanned bssid */
if (!strcmp(method, "properties"))
reply = wpas_dbus_bssid_properties(message, wpa_s, res);
out:
return reply;
}
/**
* wpas_iface_message_handler - Dispatch messages for interfaces or networks
* @connection: Connection to the system message bus
* @message: An incoming dbus message
* @user_data: A pointer to a dbus control interface data structure
* Returns: Whether or not the message was handled
*
* This function dispatches all incoming dbus messages for network interfaces,
* or objects owned by them, such as scanned BSSIDs and configured networks.
*/
static DBusHandlerResult wpas_iface_message_handler(DBusConnection *connection,
DBusMessage *message,
void *user_data)
{
struct wpa_supplicant *wpa_s = user_data;
const char *method = dbus_message_get_member(message);
const char *path = dbus_message_get_path(message);
const char *msg_interface = dbus_message_get_interface(message);
char *iface_obj_path = NULL;
char *network = NULL;
char *bssid = NULL;
DBusMessage *reply = NULL;
/* Caller must specify a message interface */
if (!msg_interface)
goto out;
iface_obj_path = wpas_dbus_decompose_object_path(path, &network,
&bssid);
if (iface_obj_path == NULL) {
reply = wpas_dbus_new_invalid_iface_error(message);
goto out;
}
/* Make sure the message's object path actually refers to the
* wpa_supplicant structure it's supposed to (which is wpa_s)
*/
if (wpa_supplicant_get_iface_by_dbus_path(wpa_s->global,
iface_obj_path) != wpa_s) {
reply = wpas_dbus_new_invalid_iface_error(message);
goto out;
}
if (network && !strcmp(msg_interface, WPAS_DBUS_IFACE_NETWORK)) {
/* A method for one of this interface's configured networks */
int nid = strtoul(network, NULL, 10);
if (errno != EINVAL)
reply = wpas_dispatch_network_method(message, wpa_s,
nid);
else
reply = wpas_dbus_new_invalid_network_error(message);
} else if (bssid && !strcmp(msg_interface, WPAS_DBUS_IFACE_BSSID)) {
/* A method for one of this interface's scanned BSSIDs */
reply = wpas_dispatch_bssid_method(message, wpa_s, bssid);
} else if (!strcmp(msg_interface, WPAS_DBUS_IFACE_INTERFACE)) {
/* A method for an interface only. */
if (!strcmp(method, "scan"))
reply = wpas_dbus_iface_scan(message, wpa_s);
else if (!strcmp(method, "scanResults"))
reply = wpas_dbus_iface_scan_results(message, wpa_s);
else if (!strcmp(method, "addNetwork"))
reply = wpas_dbus_iface_add_network(message, wpa_s);
else if (!strcmp(method, "removeNetwork"))
reply = wpas_dbus_iface_remove_network(message, wpa_s);
else if (!strcmp(method, "selectNetwork"))
reply = wpas_dbus_iface_select_network(message, wpa_s);
else if (!strcmp(method, "capabilities"))
reply = wpas_dbus_iface_capabilities(message, wpa_s);
else if (!strcmp(method, "disconnect"))
reply = wpas_dbus_iface_disconnect(message, wpa_s);
else if (!strcmp(method, "setAPScan"))
reply = wpas_dbus_iface_set_ap_scan(message, wpa_s);
else if (!strcmp(method, "setSmartcardModules"))
reply = wpas_dbus_iface_set_smartcard_modules(message,
wpa_s);
else if (!strcmp(method, "state"))
reply = wpas_dbus_iface_get_state(message, wpa_s);
else if (!strcmp(method, "setBlobs"))
reply = wpas_dbus_iface_set_blobs(message, wpa_s);
else if (!strcmp(method, "removeBlobs"))
reply = wpas_dbus_iface_remove_blobs(message, wpa_s);
#ifdef CONFIG_WPS
else if (!os_strcmp(method, "wpsPbc"))
reply = wpas_dbus_iface_wps_pbc(message, wpa_s);
else if (!os_strcmp(method, "wpsPin"))
reply = wpas_dbus_iface_wps_pin(message, wpa_s);
else if (!os_strcmp(method, "wpsReg"))
reply = wpas_dbus_iface_wps_reg(message, wpa_s);
#endif /* CONFIG_WPS */
}
/* If the message was handled, send back the reply */
if (reply) {
if (!dbus_message_get_no_reply(message))
dbus_connection_send(connection, reply, NULL);
dbus_message_unref(reply);
}
out:
free(iface_obj_path);
free(network);
free(bssid);
return reply ? DBUS_HANDLER_RESULT_HANDLED :
DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
/**
* wpas_message_handler - dispatch incoming dbus messages
* @connection: connection to the system message bus
* @message: an incoming dbus message
* @user_data: a pointer to a dbus control interface data structure
* Returns: whether or not the message was handled
*
* This function dispatches all incoming dbus messages to the correct
* handlers, depending on what the message's target object path is,
* and what the method call is.
*/
static DBusHandlerResult wpas_message_handler(DBusConnection *connection,
DBusMessage *message, void *user_data)
{
struct ctrl_iface_dbus_priv *ctrl_iface = user_data;
const char *method;
const char *path;
const char *msg_interface;
DBusMessage *reply = NULL;
method = dbus_message_get_member(message);
path = dbus_message_get_path(message);
msg_interface = dbus_message_get_interface(message);
if (!method || !path || !ctrl_iface || !msg_interface)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
/* Validate the method interface */
if (strcmp(msg_interface, WPAS_DBUS_INTERFACE) != 0)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
if (!strcmp(path, WPAS_DBUS_PATH)) {
/* dispatch methods against our global dbus interface here */
if (!strcmp(method, "addInterface")) {
reply = wpas_dbus_global_add_interface(
message, ctrl_iface->global);
} else if (!strcmp(method, "removeInterface")) {
reply = wpas_dbus_global_remove_interface(
message, ctrl_iface->global);
} else if (!strcmp(method, "getInterface")) {
reply = wpas_dbus_global_get_interface(
message, ctrl_iface->global);
} else if (!strcmp(method, "setDebugParams")) {
reply = wpas_dbus_global_set_debugparams(
message, ctrl_iface->global);
}
}
/* If the message was handled, send back the reply */
if (reply) {
if (!dbus_message_get_no_reply(message))
dbus_connection_send(connection, reply, NULL);
dbus_message_unref(reply);
}
return reply ? DBUS_HANDLER_RESULT_HANDLED :
DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
}
/**
* 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);
}
/**
* 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);
}
#ifdef CONFIG_WPS
void wpa_supplicant_dbus_notify_wps_cred(struct wpa_supplicant *wpa_s,
const struct wps_credential *cred)
{
struct ctrl_iface_dbus_priv *iface;
DBusMessage *_signal = NULL;
const char *path;
/* 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;
path = wpa_supplicant_get_dbus_path(wpa_s);
if (path == NULL) {
perror("wpa_supplicant_dbus_notify_wps_cred[dbus]: "
"interface didn't have a dbus path");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_wps_cred[dbus]: "
"interface didn't have a dbus path; can't send "
"signal.");
return;
}
_signal = dbus_message_new_signal(path, WPAS_DBUS_IFACE_INTERFACE,
"WpsCred");
if (_signal == NULL) {
perror("wpa_supplicant_dbus_notify_wps_cred[dbus]: "
"couldn't create dbus signal; likely out of memory");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_wps_cred[dbus]: "
"couldn't create dbus signal; likely out of "
"memory.");
return;
}
if (!dbus_message_append_args(_signal,
DBUS_TYPE_ARRAY, DBUS_TYPE_BYTE,
&cred->cred_attr, cred->cred_attr_len,
DBUS_TYPE_INVALID)) {
perror("wpa_supplicant_dbus_notify_wps_cred[dbus]: "
"not enough memory to construct signal.");
wpa_printf(MSG_ERROR,
"wpa_supplicant_dbus_notify_wps_cred[dbus]: "
"not enough memory to construct signal.");
goto out;
}
dbus_connection_send(iface->con, _signal, NULL);
out:
dbus_message_unref(_signal);
}
#endif /* CONFIG_WPS */
/**
* integrate_with_eloop - Register our mainloop integration with dbus
* @connection: connection to the system message bus
* @iface: a dbus control interface data structure
* Returns: 0 on success, -1 on failure
*
* We register our mainloop integration functions with dbus here.
*/
static int integrate_with_eloop(DBusConnection *connection,
struct ctrl_iface_dbus_priv *iface)
{
if (!dbus_connection_set_watch_functions(connection, add_watch,
remove_watch, watch_toggled,
iface, NULL)) {
perror("dbus_connection_set_watch_functions[dbus]");
wpa_printf(MSG_ERROR, "Not enough memory to set up dbus.");
return -1;
}
if (!dbus_connection_set_timeout_functions(connection, add_timeout,
remove_timeout,
timeout_toggled, iface,
NULL)) {
perror("dbus_connection_set_timeout_functions[dbus]");
wpa_printf(MSG_ERROR, "Not enough memory to set up dbus.");
return -1;
}
if (connection_setup_wakeup_main(iface) < 0) {
perror("connection_setup_wakeup_main[dbus]");
wpa_printf(MSG_ERROR, "Could not setup main wakeup function.");
return -1;
}
return 0;
}
/**
* dispatch_initial_dbus_messages - Dispatch initial dbus messages after
* claiming bus name
* @eloop_ctx: the DBusConnection to dispatch on
* @timeout_ctx: unused
*
* If clients are quick to notice that wpa_supplicant claimed its bus name,
* there may have been messages that came in before initialization was
* all finished. Dispatch those here.
*/
static void dispatch_initial_dbus_messages(void *eloop_ctx, void *timeout_ctx)
{
DBusConnection *con = eloop_ctx;
while (dbus_connection_get_dispatch_status(con) ==
DBUS_DISPATCH_DATA_REMAINS)
dbus_connection_dispatch(con);
}
/**
* wpa_supplicant_dbus_ctrl_iface_init - Initialize dbus control interface
* @global: Pointer to global data from wpa_supplicant_init()
* Returns: Pointer to dbus_ctrl_iface date or %NULL on failure
*
* Initialize the dbus control interface and start receiving commands from
* external programs over the bus.
*/
struct ctrl_iface_dbus_priv *
wpa_supplicant_dbus_ctrl_iface_init(struct wpa_global *global)
{
struct ctrl_iface_dbus_priv *iface;
DBusError error;
int ret = -1;
DBusObjectPathVTable wpas_vtable = {
NULL, &wpas_message_handler, NULL, NULL, NULL, NULL
};
iface = os_zalloc(sizeof(struct ctrl_iface_dbus_priv));
if (iface == NULL)
return NULL;
iface->global = global;
/* Get a reference to the system bus */
dbus_error_init(&error);
iface->con = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
dbus_error_free(&error);
if (!iface->con) {
perror("dbus_bus_get[ctrl_iface_dbus]");
wpa_printf(MSG_ERROR, "Could not acquire the system bus.");
goto fail;
}
/* Tell dbus about our mainloop integration functions */
if (integrate_with_eloop(iface->con, iface))
goto fail;
/* Register the message handler for the global dbus interface */
if (!dbus_connection_register_object_path(iface->con,
WPAS_DBUS_PATH, &wpas_vtable,
iface)) {
perror("dbus_connection_register_object_path[dbus]");
wpa_printf(MSG_ERROR, "Could not set up DBus message "
"handler.");
goto fail;
}
/* Register our service with the message bus */
dbus_error_init(&error);
switch (dbus_bus_request_name(iface->con, WPAS_DBUS_SERVICE,
0, &error)) {
case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
ret = 0;
break;
case DBUS_REQUEST_NAME_REPLY_EXISTS:
case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
perror("dbus_bus_request_name[dbus]");
wpa_printf(MSG_ERROR, "Could not request DBus service name: "
"already registered.");
break;
default:
perror("dbus_bus_request_name[dbus]");
wpa_printf(MSG_ERROR, "Could not request DBus service name: "
"%s %s.", error.name, error.message);
break;
}
dbus_error_free(&error);
if (ret != 0)
goto fail;
wpa_printf(MSG_DEBUG, "Providing DBus service '" WPAS_DBUS_SERVICE
"'.");
/*
* Dispatch initial DBus messages that may have come in since the bus
* name was claimed above. Happens when clients are quick to notice the
* wpa_supplicant service.
*
* FIXME: is there a better solution to this problem?
*/
eloop_register_timeout(0, 50, dispatch_initial_dbus_messages,
iface->con, NULL);
return iface;
fail:
wpa_supplicant_dbus_ctrl_iface_deinit(iface);
return NULL;
}
/**
* wpa_supplicant_dbus_ctrl_iface_deinit - Deinitialize dbus ctrl interface
* @iface: Pointer to dbus private data from
* wpa_supplicant_dbus_ctrl_iface_init()
*
* Deinitialize the dbus control interface that was initialized with
* wpa_supplicant_dbus_ctrl_iface_init().
*/
void wpa_supplicant_dbus_ctrl_iface_deinit(struct ctrl_iface_dbus_priv *iface)
{
if (iface == NULL)
return;
if (iface->con) {
eloop_cancel_timeout(dispatch_initial_dbus_messages,
iface->con, NULL);
dbus_connection_set_watch_functions(iface->con, NULL, NULL,
NULL, NULL, NULL);
dbus_connection_set_timeout_functions(iface->con, NULL, NULL,
NULL, NULL, NULL);
dbus_connection_unref(iface->con);
}
memset(iface, 0, sizeof(struct ctrl_iface_dbus_priv));
free(iface);
}
/**
* wpas_dbus_register_new_iface - Register a new interface with dbus
* @wpa_s: %wpa_supplicant interface description structure to register
* Returns: 0 on success, -1 on error
*
* Registers a new interface with dbus and assigns it a dbus object path.
*/
int wpas_dbus_register_iface(struct wpa_supplicant *wpa_s)
{
struct ctrl_iface_dbus_priv *ctrl_iface =
wpa_s->global->dbus_ctrl_iface;
DBusConnection * con;
u32 next;
DBusObjectPathVTable vtable = {
NULL, &wpas_iface_message_handler, NULL, NULL, NULL, NULL
};
char *path;
int ret = -1;
/* Do nothing if the control interface is not turned on */
if (ctrl_iface == NULL)
return 0;
con = ctrl_iface->con;
next = wpa_supplicant_dbus_next_objid(ctrl_iface);
/* Create and set the interface's object path */
path = os_zalloc(WPAS_DBUS_OBJECT_PATH_MAX);
if (path == NULL)
return -1;
snprintf(path, WPAS_DBUS_OBJECT_PATH_MAX,
WPAS_DBUS_PATH_INTERFACES "/%u",
next);
if (wpa_supplicant_set_dbus_path(wpa_s, path)) {
wpa_printf(MSG_DEBUG,
"Failed to set dbus path for interface %s",
wpa_s->ifname);
goto out;
}
/* Register the message handler for the interface functions */
if (!dbus_connection_register_fallback(con, path, &vtable, wpa_s)) {
perror("wpas_dbus_register_iface [dbus]");
wpa_printf(MSG_ERROR, "Could not set up DBus message "
"handler for interface %s.", wpa_s->ifname);
goto out;
}
ret = 0;
out:
free(path);
return ret;
}
/**
* 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;
DBusConnection *con;
const char *path;
/* Do nothing if the control interface is not turned on */
if (wpa_s == NULL || wpa_s->global == NULL)
return 0;
ctrl_iface = wpa_s->global->dbus_ctrl_iface;
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;
}
/**
* wpa_supplicant_get_iface_by_dbus_path - Get a new network interface
* @global: Pointer to global data from wpa_supplicant_init()
* @path: Pointer to a dbus object path representing an interface
* Returns: Pointer to the interface or %NULL if not found
*/
struct wpa_supplicant * wpa_supplicant_get_iface_by_dbus_path(
struct wpa_global *global, const char *path)
{
struct wpa_supplicant *wpa_s;
for (wpa_s = global->ifaces; wpa_s; wpa_s = wpa_s->next) {
if (strcmp(wpa_s->dbus_path, path) == 0)
return wpa_s;
}
return NULL;
}
/**
* wpa_supplicant_set_dbus_path - Assign a dbus path to an interface
* @wpa_s: wpa_supplicant interface structure
* @path: dbus path to set on the interface
* Returns: 0 on succes, -1 on error
*/
int wpa_supplicant_set_dbus_path(struct wpa_supplicant *wpa_s,
const char *path)
{
u32 len = strlen (path);
if (len >= WPAS_DBUS_OBJECT_PATH_MAX)
return -1;
if (wpa_s->dbus_path)
return -1;
wpa_s->dbus_path = strdup(path);
return 0;
}
/**
* wpa_supplicant_get_dbus_path - Get an interface's dbus path
* @wpa_s: %wpa_supplicant interface structure
* Returns: Interface's dbus object path, or %NULL on error
*/
const char * wpa_supplicant_get_dbus_path(struct wpa_supplicant *wpa_s)
{
return wpa_s->dbus_path;
}