mirror of
https://git.kernel.org/pub/scm/network/wireless/iwd.git
synced 2025-10-31 21:27:30 +01:00
netdev: Implement RSSI level notifications API
Add an methods and an event using the new NL80211_EXT_FEATURE_CQM_RSSI_LIST kernel feature to request RSSI monitoring with notifications only when RSSI moves from one of the N intervals requested to another. device.c will call netdev_set_rssi_report_levels to request NETDEV_EVENT_RSSI_LEVEL_NOTIFY events every time the RSSI level changes, level meaning one of the intervals delimited by the threshold values passed as argument. Inside the event handler it can call netdev_get_rssi_level to read the new level. There's no fallback to periodic polling implemented in this patch for the case of older kernels and/or the driver not supporting NL80211_EXT_FEATURE_CQM_RSSI_LIST.
This commit is contained in:
Andrew Zaborowski
Denis Kenzior
parent
f64dea81b8
commit
faa8dce6da
@ -1408,6 +1408,8 @@ static void device_netdev_event(struct netdev *netdev, enum netdev_event event,
|
||||
|
||||
device->signal_low = false;
|
||||
|
||||
break;
|
||||
case NETDEV_EVENT_RSSI_LEVEL_NOTIFY:
|
||||
break;
|
||||
};
|
||||
}
|
||||
|
||||
249
src/netdev.c
249
src/netdev.c
@ -78,6 +78,10 @@ struct netdev {
|
||||
enum netdev_result result;
|
||||
struct l_timeout *neighbor_report_timeout;
|
||||
uint8_t prev_bssid[ETH_ALEN];
|
||||
int8_t rssi_levels[16];
|
||||
uint8_t rssi_levels_num : 4;
|
||||
uint8_t cur_rssi_level_idx;
|
||||
int8_t cur_rssi;
|
||||
|
||||
struct l_queue *watches;
|
||||
uint32_t next_watch_id;
|
||||
@ -86,6 +90,7 @@ struct netdev {
|
||||
bool operational : 1;
|
||||
bool rekey_offload_support : 1;
|
||||
bool in_ft : 1;
|
||||
bool cur_rssi_low : 1;
|
||||
};
|
||||
|
||||
struct netdev_preauth_state {
|
||||
@ -448,8 +453,14 @@ static void netdev_lost_beacon(struct netdev *netdev)
|
||||
netdev_connect_free(netdev);
|
||||
}
|
||||
|
||||
static void netdev_rssi_threshold(struct netdev *netdev, uint32_t rssi_event)
|
||||
/* -70 dBm is a popular choice for low signal threshold for roaming */
|
||||
#define LOW_SIGNAL_THRESHOLD -70
|
||||
|
||||
static void netdev_cqm_event_rssi_threshold(struct netdev *netdev,
|
||||
uint32_t rssi_event)
|
||||
{
|
||||
int event;
|
||||
|
||||
if (!netdev->connected)
|
||||
return;
|
||||
|
||||
@ -457,15 +468,69 @@ static void netdev_rssi_threshold(struct netdev *netdev, uint32_t rssi_event)
|
||||
rssi_event != NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH)
|
||||
return;
|
||||
|
||||
if (netdev->event_filter) {
|
||||
int event;
|
||||
if (!netdev->event_filter)
|
||||
return;
|
||||
|
||||
event = (rssi_event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) ?
|
||||
netdev->cur_rssi_low =
|
||||
(rssi_event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW);
|
||||
event = netdev->cur_rssi_low ? NETDEV_EVENT_RSSI_THRESHOLD_LOW :
|
||||
NETDEV_EVENT_RSSI_THRESHOLD_HIGH;
|
||||
|
||||
netdev->event_filter(netdev, event, netdev->user_data);
|
||||
}
|
||||
|
||||
static void netdev_set_rssi_level_idx(struct netdev *netdev)
|
||||
{
|
||||
uint8_t new_level;
|
||||
|
||||
for (new_level = 0; new_level < netdev->rssi_levels_num; new_level++)
|
||||
if (netdev->cur_rssi >= netdev->rssi_levels[new_level])
|
||||
break;
|
||||
|
||||
netdev->cur_rssi_level_idx = new_level;
|
||||
}
|
||||
|
||||
static void netdev_rssi_level_init(struct netdev *netdev)
|
||||
{
|
||||
if (netdev->connected && netdev->rssi_levels_num)
|
||||
netdev_set_rssi_level_idx(netdev);
|
||||
}
|
||||
|
||||
static void netdev_cqm_event_rssi_value(struct netdev *netdev, int rssi_val)
|
||||
{
|
||||
bool new_rssi_low;
|
||||
uint8_t prev_rssi_level_idx = netdev->cur_rssi_level_idx;
|
||||
|
||||
if (!netdev->connected)
|
||||
return;
|
||||
|
||||
if (rssi_val > 127)
|
||||
rssi_val = 127;
|
||||
else if (rssi_val < -127)
|
||||
rssi_val = -127;
|
||||
|
||||
netdev->cur_rssi = rssi_val;
|
||||
|
||||
if (!netdev->event_filter)
|
||||
return;
|
||||
|
||||
new_rssi_low = rssi_val < LOW_SIGNAL_THRESHOLD;
|
||||
if (netdev->cur_rssi_low != new_rssi_low) {
|
||||
int event = new_rssi_low ?
|
||||
NETDEV_EVENT_RSSI_THRESHOLD_LOW :
|
||||
NETDEV_EVENT_RSSI_THRESHOLD_HIGH;
|
||||
|
||||
netdev->cur_rssi_low = new_rssi_low;
|
||||
netdev->event_filter(netdev, event, netdev->user_data);
|
||||
}
|
||||
|
||||
if (!netdev->rssi_levels_num)
|
||||
return;
|
||||
|
||||
netdev_set_rssi_level_idx(netdev);
|
||||
if (netdev->cur_rssi_level_idx != prev_rssi_level_idx)
|
||||
netdev->event_filter(netdev, NETDEV_EVENT_RSSI_LEVEL_NOTIFY,
|
||||
netdev->user_data);
|
||||
}
|
||||
|
||||
static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
|
||||
@ -474,6 +539,8 @@ static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
|
||||
struct l_genl_attr nested;
|
||||
uint16_t type, len;
|
||||
const void *data;
|
||||
uint32_t *rssi_event = NULL;
|
||||
int32_t *rssi_val = NULL;
|
||||
|
||||
if (!l_genl_attr_init(&attr, msg))
|
||||
return;
|
||||
@ -494,8 +561,14 @@ static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
|
||||
if (len != 4)
|
||||
continue;
|
||||
|
||||
netdev_rssi_threshold(netdev,
|
||||
*(uint32_t *) data);
|
||||
rssi_event = (uint32_t *) data;
|
||||
break;
|
||||
|
||||
case NL80211_ATTR_CQM_RSSI_LEVEL:
|
||||
if (len != 4)
|
||||
continue;
|
||||
|
||||
rssi_val = (int32_t *) data;
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -503,6 +576,13 @@ static void netdev_cqm_event(struct l_genl_msg *msg, struct netdev *netdev)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (rssi_event) {
|
||||
if (rssi_val)
|
||||
netdev_cqm_event_rssi_value(netdev, *rssi_val);
|
||||
else
|
||||
netdev_cqm_event_rssi_threshold(netdev, *rssi_event);
|
||||
}
|
||||
}
|
||||
|
||||
static void netdev_rekey_offload_event(struct l_genl_msg *msg,
|
||||
@ -1985,6 +2065,9 @@ static int netdev_connect_common(struct netdev *netdev,
|
||||
netdev->handshake = hs;
|
||||
netdev->sm = sm;
|
||||
netdev->frequency = bss->frequency;
|
||||
netdev->cur_rssi_low = false; /* Gets udpated on the 1st CQM event */
|
||||
netdev->cur_rssi = bss->signal_strength / 100;
|
||||
netdev_rssi_level_init(netdev);
|
||||
|
||||
handshake_state_set_authenticator_address(hs, bss->addr);
|
||||
handshake_state_set_supplicant_address(hs, netdev->addr);
|
||||
@ -2698,6 +2781,127 @@ static void netdev_unicast_notify(struct l_genl_msg *msg, void *user_data)
|
||||
}
|
||||
}
|
||||
|
||||
static struct l_genl_msg *netdev_build_cmd_cqm_rssi_update(
|
||||
struct netdev *netdev,
|
||||
const int8_t *levels,
|
||||
size_t levels_num)
|
||||
{
|
||||
struct l_genl_msg *msg;
|
||||
uint32_t hyst = 5;
|
||||
int thold_count;
|
||||
int32_t thold_list[levels_num + 2];
|
||||
|
||||
if (levels_num == 0) {
|
||||
thold_list[0] = LOW_SIGNAL_THRESHOLD;
|
||||
thold_count = 1;
|
||||
} else {
|
||||
/*
|
||||
* Build the list of all the threshold values we care about:
|
||||
* - the low/high level threshold,
|
||||
* - the value ranges requested by
|
||||
* netdev_set_rssi_report_levels
|
||||
*/
|
||||
unsigned int i;
|
||||
bool low_sig_added = false;
|
||||
|
||||
thold_count = 0;
|
||||
for (i = 0; i < levels_num; i++) {
|
||||
int32_t val = levels[levels_num - i - 1];
|
||||
|
||||
if (i && thold_list[thold_count - 1] >= val)
|
||||
return NULL;
|
||||
|
||||
if (val >= LOW_SIGNAL_THRESHOLD && !low_sig_added) {
|
||||
thold_list[thold_count++] =
|
||||
LOW_SIGNAL_THRESHOLD;
|
||||
low_sig_added = true;
|
||||
|
||||
/* Duplicate values are not allowed */
|
||||
if (val == LOW_SIGNAL_THRESHOLD)
|
||||
continue;
|
||||
}
|
||||
|
||||
thold_list[thold_count++] = val;
|
||||
}
|
||||
}
|
||||
|
||||
msg = l_genl_msg_new_sized(NL80211_CMD_SET_CQM, 32 + thold_count * 4);
|
||||
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
|
||||
l_genl_msg_enter_nested(msg, NL80211_ATTR_CQM);
|
||||
l_genl_msg_append_attr(msg, NL80211_ATTR_CQM_RSSI_THOLD,
|
||||
thold_count * 4, thold_list);
|
||||
l_genl_msg_append_attr(msg, NL80211_ATTR_CQM_RSSI_HYST, 4, &hyst);
|
||||
l_genl_msg_leave_nested(msg);
|
||||
|
||||
return msg;
|
||||
}
|
||||
|
||||
static void netdev_cmd_set_cqm_cb(struct l_genl_msg *msg, void *user_data)
|
||||
{
|
||||
if (l_genl_msg_get_error(msg) < 0)
|
||||
l_error("CMD_SET_CQM failed");
|
||||
}
|
||||
|
||||
int netdev_set_rssi_report_levels(struct netdev *netdev, const int8_t *levels,
|
||||
size_t levels_num)
|
||||
{
|
||||
struct l_genl_msg *cmd_set_cqm;
|
||||
|
||||
if (!wiphy_get_ext_feature(netdev->wiphy,
|
||||
NL80211_EXT_FEATURE_CQM_RSSI_LIST))
|
||||
return levels_num ? -ENOTSUP : 0;
|
||||
|
||||
if (levels_num > L_ARRAY_SIZE(netdev->rssi_levels))
|
||||
return -ENOSPC;
|
||||
|
||||
cmd_set_cqm = netdev_build_cmd_cqm_rssi_update(netdev, levels,
|
||||
levels_num);
|
||||
if (!cmd_set_cqm)
|
||||
return -EINVAL;
|
||||
|
||||
if (!l_genl_family_send(nl80211, cmd_set_cqm, netdev_cmd_set_cqm_cb,
|
||||
NULL, NULL)) {
|
||||
l_error("CMD_SET_CQM failed");
|
||||
|
||||
l_genl_msg_unref(cmd_set_cqm);
|
||||
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
memcpy(netdev->rssi_levels, levels, levels_num);
|
||||
netdev->rssi_levels_num = levels_num;
|
||||
netdev_rssi_level_init(netdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int netdev_get_rssi_level(struct netdev *netdev)
|
||||
{
|
||||
return netdev->cur_rssi_level_idx;
|
||||
}
|
||||
|
||||
static int netdev_cqm_rssi_update(struct netdev *netdev)
|
||||
{
|
||||
struct l_genl_msg *msg =
|
||||
netdev_build_cmd_cqm_rssi_update(netdev,
|
||||
netdev->rssi_levels,
|
||||
netdev->rssi_levels_num);
|
||||
|
||||
if (!msg)
|
||||
return -EINVAL;
|
||||
|
||||
if (!l_genl_family_send(nl80211, msg, netdev_cmd_set_cqm_cb,
|
||||
NULL, NULL)) {
|
||||
l_error("CMD_SET_CQM failed");
|
||||
|
||||
l_genl_msg_unref(msg);
|
||||
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct netdev_watch_event_data {
|
||||
struct netdev *netdev;
|
||||
enum netdev_watch_event type;
|
||||
@ -2898,29 +3102,6 @@ static void netdev_register_frame(struct netdev *netdev, uint16_t frame_type,
|
||||
l_genl_family_send(nl80211, msg, NULL, NULL, NULL);
|
||||
}
|
||||
|
||||
static struct l_genl_msg *netdev_build_cmd_set_cqm_rssi(struct netdev *netdev)
|
||||
{
|
||||
struct l_genl_msg *msg;
|
||||
/* -70 dBm is a popular choice for low signal threshold */
|
||||
int32_t thold = -70;
|
||||
uint32_t hyst = 5;
|
||||
|
||||
msg = l_genl_msg_new_sized(NL80211_CMD_SET_CQM, 128);
|
||||
l_genl_msg_append_attr(msg, NL80211_ATTR_IFINDEX, 4, &netdev->index);
|
||||
l_genl_msg_enter_nested(msg, NL80211_ATTR_CQM);
|
||||
l_genl_msg_append_attr(msg, NL80211_ATTR_CQM_RSSI_THOLD, 4, &thold);
|
||||
l_genl_msg_append_attr(msg, NL80211_ATTR_CQM_RSSI_HYST, 4, &hyst);
|
||||
l_genl_msg_leave_nested(msg);
|
||||
|
||||
return msg;
|
||||
}
|
||||
|
||||
static void netdev_cmd_set_cqm_cb(struct l_genl_msg *msg, void *user_data)
|
||||
{
|
||||
if (l_genl_msg_get_error(msg) < 0)
|
||||
l_error("CMD_SET_CQM failed");
|
||||
}
|
||||
|
||||
static void netdev_create_from_genl(struct l_genl_msg *msg)
|
||||
{
|
||||
struct l_genl_attr attr;
|
||||
@ -2935,7 +3116,6 @@ static void netdev_create_from_genl(struct l_genl_msg *msg)
|
||||
struct ifinfomsg *rtmmsg;
|
||||
size_t bufsize;
|
||||
const uint8_t action_neighbor_report_prefix[2] = { 0x05, 0x05 };
|
||||
struct l_genl_msg *set_cqm_msg;
|
||||
|
||||
if (!l_genl_attr_init(&attr, msg))
|
||||
return;
|
||||
@ -3051,14 +3231,7 @@ static void netdev_create_from_genl(struct l_genl_msg *msg)
|
||||
sizeof(action_neighbor_report_prefix));
|
||||
|
||||
/* Set RSSI threshold for CQM notifications */
|
||||
set_cqm_msg = netdev_build_cmd_set_cqm_rssi(netdev);
|
||||
|
||||
if (!l_genl_family_send(nl80211, set_cqm_msg, netdev_cmd_set_cqm_cb,
|
||||
NULL, NULL)) {
|
||||
l_error("CMD_SET_CQM failed");
|
||||
|
||||
l_genl_msg_unref(set_cqm_msg);
|
||||
}
|
||||
netdev_cqm_rssi_update(netdev);
|
||||
}
|
||||
|
||||
static void netdev_get_interface_callback(struct l_genl_msg *msg,
|
||||
|
||||
@ -46,6 +46,7 @@ enum netdev_event {
|
||||
NETDEV_EVENT_DISCONNECT_BY_SME,
|
||||
NETDEV_EVENT_RSSI_THRESHOLD_LOW,
|
||||
NETDEV_EVENT_RSSI_THRESHOLD_HIGH,
|
||||
NETDEV_EVENT_RSSI_LEVEL_NOTIFY,
|
||||
};
|
||||
|
||||
enum netdev_watch_event {
|
||||
@ -115,6 +116,10 @@ int netdev_set_powered(struct netdev *netdev, bool powered,
|
||||
int netdev_neighbor_report_req(struct netdev *netdev,
|
||||
netdev_neighbor_report_cb_t cb);
|
||||
|
||||
int netdev_set_rssi_report_levels(struct netdev *netdev, const int8_t *levels,
|
||||
size_t levels_num);
|
||||
int netdev_get_rssi_level(struct netdev *netdev);
|
||||
|
||||
struct netdev *netdev_find(int ifindex);
|
||||
|
||||
uint32_t netdev_watch_add(struct netdev *netdev, netdev_watch_func_t func,
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user