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mirror of https://git.kernel.org/pub/scm/network/wireless/iwd.git synced 2024-12-23 06:02:37 +01:00
iwd/src/device.c
2020-01-16 11:37:55 -06:00

438 lines
11 KiB
C

/*
*
* Wireless daemon for Linux
*
* Copyright (C) 2013-2019 Intel Corporation. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <linux/if_ether.h>
#include <ell/ell.h>
#include "src/iwd.h"
#include "src/module.h"
#include "src/util.h"
#include "src/wiphy.h"
#include "src/scan.h"
#include "src/netdev.h"
#include "src/dbus.h"
#include "src/frame-xchg.h"
#include "src/station.h"
struct device {
uint32_t index;
struct wiphy *wiphy;
struct netdev *netdev;
bool powered : 1; /* Current IFUP state */
bool dbus_powered : 1; /* Last IFUP state wanted via D-Bus */
uint32_t wiphy_rfkill_watch;
};
static uint32_t netdev_watch;
static void device_ap_roam_frame_event(const struct mmpdu_header *hdr,
const void *body, size_t body_len, int rssi, void *user_data)
{
struct device *device = user_data;
struct station *station = station_find(device->index);
if (!station)
return;
station_ap_directed_roam(station, hdr, body, body_len);
}
static bool device_property_get_name(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct device *device = user_data;
l_dbus_message_builder_append_basic(builder, 's',
netdev_get_name(device->netdev));
return true;
}
static bool device_property_get_address(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct device *device = user_data;
const char *str;
str = util_address_to_string(netdev_get_address(device->netdev));
l_dbus_message_builder_append_basic(builder, 's', str);
return true;
}
static bool device_property_get_powered(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct device *device = user_data;
bool powered = device->powered;
l_dbus_message_builder_append_basic(builder, 'b', &powered);
return true;
}
struct set_generic_cb_data {
struct device *device;
struct l_dbus *dbus;
struct l_dbus_message *message;
l_dbus_property_complete_cb_t complete;
};
static void set_generic_destroy(void *user_data)
{
struct set_generic_cb_data *cb_data = user_data;
/* Message hasn't been replied to, generate an Aborted error */
if (cb_data->message)
cb_data->complete(cb_data->dbus, cb_data->message,
dbus_error_aborted(cb_data->message));
l_free(cb_data);
}
static void set_powered_cb(struct netdev *netdev, int result, void *user_data)
{
struct set_generic_cb_data *cb_data = user_data;
struct l_dbus_message *reply = NULL;
if (result < 0)
reply = dbus_error_failed(cb_data->message);
cb_data->complete(cb_data->dbus, cb_data->message, reply);
cb_data->message = NULL;
}
static struct l_dbus_message *device_property_set_powered(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct device *device = user_data;
bool powered;
struct set_generic_cb_data *cb_data;
int r;
if (!l_dbus_message_iter_get_variant(new_value, "b", &powered))
return dbus_error_invalid_args(message);
device->dbus_powered = powered;
if (powered == device->powered) {
complete(dbus, message, NULL);
return NULL;
}
cb_data = l_new(struct set_generic_cb_data, 1);
cb_data->device = device;
cb_data->dbus = dbus;
cb_data->message = message;
cb_data->complete = complete;
r = netdev_set_powered(device->netdev, powered, set_powered_cb,
cb_data, set_generic_destroy);
if (r < 0) {
l_free(cb_data);
return dbus_error_from_errno(r, message);
}
return NULL;
}
static bool device_property_get_adapter(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct device *device = user_data;
l_dbus_message_builder_append_basic(builder, 'o',
wiphy_get_path(device->wiphy));
return true;
}
static bool device_property_get_mode(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_builder *builder,
void *user_data)
{
struct device *device = user_data;
uint32_t iftype = netdev_get_iftype(device->netdev);
const char *modestr = dbus_iftype_to_string(iftype);
if (modestr == NULL)
modestr = "unknown";
l_dbus_message_builder_append_basic(builder, 's', modestr);
return true;
}
static void set_mode_cb(struct netdev *netdev, int result, void *user_data)
{
struct set_generic_cb_data *cb_data = user_data;
struct l_dbus_message *reply = NULL;
if (result < 0)
reply = dbus_error_from_errno(result, cb_data->message);
cb_data->complete(cb_data->dbus, cb_data->message, reply);
cb_data->message = NULL;
l_dbus_property_changed(cb_data->dbus,
netdev_get_path(cb_data->device->netdev),
IWD_DEVICE_INTERFACE, "Mode");
}
static struct l_dbus_message *device_property_set_mode(struct l_dbus *dbus,
struct l_dbus_message *message,
struct l_dbus_message_iter *new_value,
l_dbus_property_complete_cb_t complete,
void *user_data)
{
struct device *device = user_data;
struct netdev *netdev = device->netdev;
const char *mode;
enum netdev_iftype iftype;
int r;
struct set_generic_cb_data *cb_data;
if (!l_dbus_message_iter_get_variant(new_value, "s", &mode))
return dbus_error_invalid_args(message);
if (!strcmp(mode, "station"))
iftype = NETDEV_IFTYPE_STATION;
else if (!strcmp(mode, "ap"))
iftype = NETDEV_IFTYPE_AP;
else if (!strcmp(mode, "ad-hoc"))
iftype = NETDEV_IFTYPE_ADHOC;
else
return dbus_error_invalid_args(message);
if (iftype == netdev_get_iftype(netdev)) {
complete(dbus, message, NULL);
return NULL;
}
cb_data = l_new(struct set_generic_cb_data, 1);
cb_data->device = device;
cb_data->dbus = dbus;
cb_data->message = message;
cb_data->complete = complete;
r = netdev_set_iftype(device->netdev, iftype, set_mode_cb,
cb_data, set_generic_destroy);
if (r < 0) {
l_free(cb_data);
return dbus_error_from_errno(r, message);
}
return NULL;
}
static void setup_device_interface(struct l_dbus_interface *interface)
{
l_dbus_interface_property(interface, "Name", 0, "s",
device_property_get_name, NULL);
l_dbus_interface_property(interface, "Address", 0, "s",
device_property_get_address, NULL);
l_dbus_interface_property(interface, "Powered", 0, "b",
device_property_get_powered,
device_property_set_powered);
l_dbus_interface_property(interface, "Adapter", 0, "o",
device_property_get_adapter, NULL);
l_dbus_interface_property(interface, "Mode", 0, "s",
device_property_get_mode,
device_property_set_mode);
}
static void device_wiphy_state_changed_event(struct wiphy *wiphy,
enum wiphy_state_watch_event event,
void *user_data)
{
struct device *device = user_data;
switch (event) {
case WIPHY_STATE_WATCH_EVENT_RFKILLED:
break;
case WIPHY_STATE_WATCH_EVENT_POWERED:
if (device->dbus_powered)
netdev_set_powered(device->netdev, true,
NULL, NULL, NULL);
break;
}
}
static struct device *device_create(struct wiphy *wiphy, struct netdev *netdev)
{
struct device *device;
struct l_dbus *dbus = dbus_get_bus();
uint32_t ifindex = netdev_get_ifindex(netdev);
const uint8_t action_ap_roam_prefix[2] = { 0x0a, 0x07 };
device = l_new(struct device, 1);
device->index = ifindex;
device->wiphy = wiphy;
device->netdev = netdev;
if (!l_dbus_object_add_interface(dbus, netdev_get_path(device->netdev),
IWD_DEVICE_INTERFACE, device))
l_info("Unable to register %s interface", IWD_DEVICE_INTERFACE);
if (!l_dbus_object_add_interface(dbus, netdev_get_path(device->netdev),
L_DBUS_INTERFACE_PROPERTIES, device))
l_info("Unable to register %s interface",
L_DBUS_INTERFACE_PROPERTIES);
/*
* register for AP roam transition watch
*/
frame_watch_add(netdev_get_wdev_id(netdev), 0, 0x00d0,
action_ap_roam_prefix, sizeof(action_ap_roam_prefix),
device_ap_roam_frame_event, device, NULL);
device->powered = netdev_get_is_up(netdev);
device->dbus_powered = true;
device->wiphy_rfkill_watch =
wiphy_state_watch_add(wiphy, device_wiphy_state_changed_event,
device, NULL);
return device;
}
static void device_free(struct device *device)
{
l_debug("");
wiphy_state_watch_remove(device->wiphy, device->wiphy_rfkill_watch);
/*
* We're triggered on NETDEV_WATCH_EVENT_DEL or device_exit. The former
* is triggered on NL80211_CMD_DEL_INTERFACE and RTM_DELLINK which
* also cause all frame watches to be unregistered so we don't have
* to do this here. device_exit is triggered under the same conditions
* as frame_xchg_exit.
*/
l_free(device);
}
static void device_netdev_notify(struct netdev *netdev,
enum netdev_watch_event event,
void *user_data)
{
struct device *device;
struct l_dbus *dbus = dbus_get_bus();
const char *path = netdev_get_path(netdev);
device = l_dbus_object_get_data(dbus, path, IWD_DEVICE_INTERFACE);
if (!device && event != NETDEV_WATCH_EVENT_NEW)
return;
switch (event) {
case NETDEV_WATCH_EVENT_NEW:
if (L_WARN_ON(device))
break;
if (netdev_get_iftype(netdev) == NETDEV_IFTYPE_P2P_CLIENT ||
netdev_get_iftype(netdev) ==
NETDEV_IFTYPE_P2P_GO)
return;
device_create(netdev_get_wiphy(netdev), netdev);
break;
case NETDEV_WATCH_EVENT_DEL:
l_dbus_unregister_object(dbus, path);
break;
case NETDEV_WATCH_EVENT_UP:
device->powered = true;
l_dbus_property_changed(dbus, path,
IWD_DEVICE_INTERFACE, "Powered");
break;
case NETDEV_WATCH_EVENT_DOWN:
device->powered = false;
l_dbus_property_changed(dbus, path,
IWD_DEVICE_INTERFACE, "Powered");
break;
case NETDEV_WATCH_EVENT_NAME_CHANGE:
l_dbus_property_changed(dbus, path,
IWD_DEVICE_INTERFACE, "Name");
break;
case NETDEV_WATCH_EVENT_ADDRESS_CHANGE:
l_dbus_property_changed(dbus, path,
IWD_DEVICE_INTERFACE, "Address");
break;
default:
break;
}
}
static void destroy_device_interface(void *user_data)
{
struct device *device = user_data;
device_free(device);
}
static int device_init(void)
{
if (!l_dbus_register_interface(dbus_get_bus(),
IWD_DEVICE_INTERFACE,
setup_device_interface,
destroy_device_interface, false))
return false;
netdev_watch = netdev_watch_add(device_netdev_notify, NULL, NULL);
return 0;
}
static void device_exit(void)
{
netdev_watch_remove(netdev_watch);
l_dbus_unregister_interface(dbus_get_bus(), IWD_DEVICE_INTERFACE);
}
IWD_MODULE(device, device_init, device_exit)