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station: Move AP directed roam watch to station

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Logically this frame watch belongs in station.  It was kept in device.c
for the purported reason that the station object was removed with
ifdown/ifup changes and hence the frame watch might need to be removed
and re-added unnecessarily.  Since the kernel does not actually allow to
unregister a frame watch (only when the netdev is removed or its iftype
changes), re-adding a frame watch might trigger a -EALREADY or similar
error.

Avoid this by registering the frame watch when a new netdev is detected
in STATION mode, or when the interface type changes to STATION.
This commit is contained in:
Denis Kenzior 2021-04-19 16:58:53 -05:00
parent a83bb33ea5
commit 4a1dafb907
3 changed files with 45 additions and 32 deletions
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22
src/device.c
View File

@ -37,8 +37,6 @@
#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;
@ -54,18 +52,6 @@ struct device {
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,
@ -304,7 +290,6 @@ 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;
@ -320,13 +305,6 @@ static struct device *device_create(struct wiphy *wiphy, struct netdev *netdev)
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;

51
src/station.c
View File

@ -55,6 +55,7 @@
#include "src/anqp.h"
#include "src/anqputil.h"
#include "src/diagnostic.h"
#include "src/frame-xchg.h"
static struct l_queue *station_list;
static uint32_t netdev_watch;
@ -2221,9 +2222,9 @@ static bool station_cannot_roam(struct station *station)
#define WNM_REQUEST_MODE_TERMINATION_IMMINENT (1 << 3)
#define WNM_REQUEST_MODE_ESS_DISASSOCIATION_IMMINENT (1 << 4)
void station_ap_directed_roam(struct station *station,
const struct mmpdu_header *hdr,
const void *body, size_t body_len)
static void station_ap_directed_roam(struct station *station,
const struct mmpdu_header *hdr,
const void *body, size_t body_len)
{
uint32_t pos = 0;
uint8_t req_mode;
@ -3704,15 +3705,48 @@ static void station_destroy_diagnostic_interface(void *user_data)
{
}
static void ap_roam_frame_event(const struct mmpdu_header *hdr,
const void *body, size_t body_len,
int rssi, void *user_data)
{
uint32_t ifindex = L_PTR_TO_UINT(user_data);
struct station *station = station_find(ifindex);
if (!station)
return;
station_ap_directed_roam(station, hdr, body, body_len);
}
static void add_frame_watches(struct netdev *netdev)
{
static const uint8_t action_ap_roam_prefix[2] = { 0x0a, 0x07 };
/*
* 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),
ap_roam_frame_event,
L_UINT_TO_PTR(netdev_get_ifindex(netdev)), NULL);
}
static void station_netdev_watch(struct netdev *netdev,
enum netdev_watch_event event, void *userdata)
{
switch (event) {
case NETDEV_WATCH_EVENT_UP:
case NETDEV_WATCH_EVENT_NEW:
if (netdev_get_iftype(netdev) == NETDEV_IFTYPE_STATION &&
netdev_get_is_up(netdev))
if (netdev_get_iftype(netdev) == NETDEV_IFTYPE_STATION) {
add_frame_watches(netdev);
if (netdev_get_is_up(netdev))
station_create(netdev);
}
break;
case NETDEV_WATCH_EVENT_UP:
if (netdev_get_iftype(netdev) == NETDEV_IFTYPE_STATION)
station_create(netdev);
break;
case NETDEV_WATCH_EVENT_DOWN:
case NETDEV_WATCH_EVENT_DEL:
@ -3720,6 +3754,11 @@ static void station_netdev_watch(struct netdev *netdev,
netdev_get_path(netdev),
IWD_STATION_INTERFACE);
break;
case NETDEV_WATCH_EVENT_IFTYPE_CHANGE:
if (netdev_get_iftype(netdev) == NETDEV_IFTYPE_STATION)
add_frame_watches(netdev);
break;
default:
break;
}

4
src/station.h
View File

@ -83,10 +83,6 @@ void station_remove_anqp_watch(uint32_t id);
bool station_set_autoconnect(struct station *station, bool autoconnect);
void station_ap_directed_roam(struct station *station,
const struct mmpdu_header *hdr,
const void *body, size_t body_len);
int __station_connect_network(struct station *station, struct network *network,
struct scan_bss *bss);
void station_connect_network(struct station *station, struct network *network,