diff --git a/src/adv_monitor.c b/src/adv_monitor.c
index 131dc80..9f04aae 100644
--- a/src/adv_monitor.c
+++ b/src/adv_monitor.c
uint8_t max_num_patterns;
struct queue *apps; /* apps who registered for Adv monitoring */
+ struct queue *merged_patterns;
};
struct adv_monitor_app {
MONITOR_STATE_RELEASED, /* Dbus Object removed by app */
};
+enum merged_pattern_state {
+ MERGED_PATTERN_STATE_ADDING, /* Adding pattern to kernel */
+ MERGED_PATTERN_STATE_REMOVING, /* Removing pattern from kernel */
+ MERGED_PATTERN_STATE_STABLE, /* Idle */
+};
+
struct rssi_parameters {
int8_t high_rssi; /* High RSSI threshold */
uint16_t high_rssi_timeout; /* High RSSI threshold timeout */
char *path;
enum monitor_state state; /* MONITOR_STATE_* */
- uint16_t monitor_handle; /* Kernel Monitor Handle */
struct rssi_parameters rssi; /* RSSI parameter for this monitor */
+ struct adv_monitor_merged_pattern *merged_pattern;
+
struct queue *devices; /* List of adv_monitor_device objects */
+};
+/* Some chipsets doesn't support multiple monitors with the same pattern.
+ * To solve that and to generally ease their task, we merge monitors with the
+ * same pattern, so those monitors will only be sent once to the kernel.
+ */
+struct adv_monitor_merged_pattern {
+ struct btd_adv_monitor_manager *manager;
+ uint16_t monitor_handle; /* Kernel Monitor Handle */
+ struct rssi_parameters rssi; /* Merged RSSI parameter for |monitors|,
+ * this will be sent to the kernel.
+ */
+ struct queue *monitors; /* List of adv_monitor objects which
+ * have this pattern
+ */
enum monitor_type type; /* MONITOR_TYPE_* */
struct queue *patterns; /* List of bt_ad_pattern objects */
+ enum merged_pattern_state current_state; /* MERGED_PATTERN_STATE_* */
+ enum merged_pattern_state next_state; /* MERGED_PATTERN_STATE_* */
};
/* Some data like last_seen, timer/timeout values need to be maintained
static void adv_monitor_filter_rssi(struct adv_monitor *monitor,
struct btd_device *device, int8_t rssi);
+static void merged_pattern_send_add(
+ struct adv_monitor_merged_pattern *merged_pattern);
+static void merged_pattern_send_remove(
+ struct adv_monitor_merged_pattern *merged_pattern);
+
const struct adv_monitor_type {
enum monitor_type type;
const char *name;
free(pattern);
}
+static void merged_pattern_free(void *data)
+{
+ struct adv_monitor_merged_pattern *merged_pattern = data;
+
+ queue_destroy(merged_pattern->patterns, pattern_free);
+ queue_destroy(merged_pattern->monitors, NULL);
+
+ if (merged_pattern->manager)
+ queue_remove(merged_pattern->manager->merged_patterns,
+ merged_pattern);
+ free(merged_pattern);
+}
+
+/* Returns the smaller of the two integers |a| and |b| which is not equal to the
+ * |unset| value. If both are unset, return unset.
+ */
+static int get_smaller_not_unset(int a, int b, int unset)
+{
+ if (a == unset)
+ return b;
+ if (b == unset)
+ return a;
+
+ return a < b ? a : b;
+}
+
+/* Merges two RSSI parameters, return the result. The result is chosen to be
+ * whichever is more lenient of the two inputs, so we can pass that to the
+ * kernel and still do additional filtering in the user space without loss of
+ * information while still receiving benefit from offloading some filtering to
+ * the hardware.
+ * It is allowed for |a|, |b|, and |merged| to point to the same object.
+ */
+static void merge_rssi(const struct rssi_parameters *a,
+ const struct rssi_parameters *b,
+ struct rssi_parameters *merged)
+{
+ /* For low rssi, low_timeout, and high_rssi, choose the minimum of the
+ * two values. Filtering the higher values is done on userspace.
+ */
+ merged->low_rssi = get_smaller_not_unset(a->low_rssi, b->low_rssi,
+ ADV_MONITOR_UNSET_RSSI);
+ merged->high_rssi = get_smaller_not_unset(a->high_rssi, b->high_rssi,
+ ADV_MONITOR_UNSET_RSSI);
+ merged->low_rssi_timeout = get_smaller_not_unset(a->low_rssi_timeout,
+ b->low_rssi_timeout,
+ ADV_MONITOR_UNSET_TIMEOUT);
+
+ /* High timeout doesn't matter for now, it will be zeroed when it is
+ * forwarded to kernel anyway.
+ */
+ merged->high_rssi_timeout = 0;
+
+ /* Sampling period is not implemented yet in userspace. There is no
+ * good value if the two values are different, so just choose 0 for
+ * always reporting, to avoid missing packets.
+ */
+ if (a->sampling_period != b->sampling_period)
+ merged->sampling_period = 0;
+ else
+ merged->sampling_period = a->sampling_period;
+}
+
+/* Two merged_pattern are considered equal if all the following are true:
+ * (1) both has the same monitor_type
+ * (2) both has exactly the same pattern in the same order
+ * Therefore, patterns A+B and B+A are considered different, as well as patterns
+ * A and A+A. This shouldn't cause any issue, but solving this issue is a
+ * potential improvement.
+ */
+static bool merged_pattern_is_equal(const void *data, const void *match_data)
+{
+ const struct adv_monitor_merged_pattern *a = data;
+ const struct adv_monitor_merged_pattern *b = match_data;
+ const struct queue_entry *a_entry, *b_entry;
+ struct bt_ad_pattern *a_data, *b_data;
+
+ if (a->type != b->type)
+ return false;
+
+ if (queue_length(a->patterns) != queue_length(b->patterns))
+ return false;
+
+ a_entry = queue_get_entries(a->patterns);
+ b_entry = queue_get_entries(b->patterns);
+
+ while (a_entry) {
+ a_data = a_entry->data;
+ b_data = b_entry->data;
+
+ if (a_data->type != b_data->type ||
+ a_data->offset != b_data->offset ||
+ a_data->len != b_data->len ||
+ memcmp(a_data->data, b_data->data, a_data->len) != 0)
+ return false;
+
+ a_entry = a_entry->next;
+ b_entry = b_entry->next;
+ }
+
+ return true;
+}
+
+static char *get_merged_pattern_state_name(enum merged_pattern_state state)
+{
+ switch (state) {
+ case MERGED_PATTERN_STATE_ADDING:
+ return "Adding";
+ case MERGED_PATTERN_STATE_REMOVING:
+ return "Removing";
+ case MERGED_PATTERN_STATE_STABLE:
+ return "Stable";
+ }
+
+ return NULL;
+}
+
+/* Adds a new merged pattern */
+static void merged_pattern_add(
+ struct adv_monitor_merged_pattern *merged_pattern)
+{
+ /* This is only called when no merged_pattern found. Therefore, the
+ * state must be stable.
+ */
+ if (merged_pattern->current_state != MERGED_PATTERN_STATE_STABLE) {
+ btd_error(merged_pattern->manager->adapter_id,
+ "Add merged_pattern request when state is not stable");
+ return;
+ }
+
+ merged_pattern->current_state = MERGED_PATTERN_STATE_ADDING;
+ merged_pattern_send_add(merged_pattern);
+
+ DBG("Monitor state: %s -> %s",
+ get_merged_pattern_state_name(merged_pattern->current_state),
+ get_merged_pattern_state_name(merged_pattern->next_state));
+}
+
+/* Removes merged pattern, or queues for removal if busy */
+static void merged_pattern_remove(
+ struct adv_monitor_merged_pattern *merged_pattern)
+{
+ rssi_unset(&merged_pattern->rssi);
+
+ /* If we currently are removing, cancel subsequent ADD command if any */
+ if (merged_pattern->current_state == MERGED_PATTERN_STATE_REMOVING) {
+ merged_pattern->next_state = MERGED_PATTERN_STATE_STABLE;
+ goto print_state;
+ }
+
+ /* If stable, we can proceed with removal right away */
+ if (merged_pattern->current_state == MERGED_PATTERN_STATE_STABLE) {
+ merged_pattern->current_state = MERGED_PATTERN_STATE_REMOVING;
+ merged_pattern_send_remove(merged_pattern);
+ } else {
+ /* otherwise queue the removal */
+ merged_pattern->next_state = MERGED_PATTERN_STATE_REMOVING;
+ }
+
+print_state:
+ DBG("Monitor state: %s -> %s",
+ get_merged_pattern_state_name(merged_pattern->current_state),
+ get_merged_pattern_state_name(merged_pattern->next_state));
+}
+
+/* Replaces (removes and re-adds) merged pattern, or queues it if busy */
+static void merged_pattern_replace(
+ struct adv_monitor_merged_pattern *merged_pattern,
+ const struct rssi_parameters *rssi)
+{
+ /* If the RSSI are the same then nothing needs to be done, except on
+ * the case where pattern is being removed. In that case, we need to
+ * re-add the pattern.
+ * high_rssi_timeout is purposedly left out in the comparison since
+ * the value is ignored upon submission to kernel.
+ */
+ if (merged_pattern->rssi.high_rssi == rssi->high_rssi &&
+ merged_pattern->rssi.low_rssi == rssi->low_rssi &&
+ merged_pattern->rssi.low_rssi_timeout == rssi->low_rssi_timeout &&
+ merged_pattern->rssi.sampling_period == rssi->sampling_period &&
+ merged_pattern->current_state != MERGED_PATTERN_STATE_REMOVING &&
+ merged_pattern->next_state != MERGED_PATTERN_STATE_REMOVING)
+ return;
+
+ merged_pattern->rssi = *rssi;
+
+ /* If stable, we can proceed with replacement. */
+ if (merged_pattern->current_state == MERGED_PATTERN_STATE_STABLE) {
+ /* Replacement is done by first removing, then re-adding */
+ merged_pattern->current_state = MERGED_PATTERN_STATE_REMOVING;
+ merged_pattern->next_state = MERGED_PATTERN_STATE_ADDING;
+ merged_pattern_send_remove(merged_pattern);
+ } else {
+ /* otherwise queue the replacement */
+ merged_pattern->next_state = MERGED_PATTERN_STATE_ADDING;
+ }
+
+ DBG("Monitor state: %s -> %s",
+ get_merged_pattern_state_name(merged_pattern->current_state),
+ get_merged_pattern_state_name(merged_pattern->next_state));
+}
+
+/* Current_state of merged_pattern is done, proceed to the next_state */
+static void merged_pattern_process_next_step(
+ struct adv_monitor_merged_pattern *mp)
+{
+ if (mp->current_state == MERGED_PATTERN_STATE_STABLE) {
+ btd_error(mp->manager->adapter_id,
+ "Merged pattern invalid current state");
+ return;
+ }
+
+ if (mp->current_state == MERGED_PATTERN_STATE_REMOVING) {
+ /* We might need to follow-up with re-adding the pattern */
+ if (mp->next_state == MERGED_PATTERN_STATE_ADDING) {
+ mp->current_state = MERGED_PATTERN_STATE_ADDING;
+ mp->next_state = MERGED_PATTERN_STATE_STABLE;
+ merged_pattern_send_add(mp);
+ goto print_state;
+ }
+
+ /* We should never end up with remove-remove sequence */
+ if (mp->next_state == MERGED_PATTERN_STATE_REMOVING)
+ btd_error(mp->manager->adapter_id,
+ "Merged pattern can't be removed again");
+
+ /* No more operations */
+ mp->current_state = MERGED_PATTERN_STATE_STABLE;
+ mp->next_state = MERGED_PATTERN_STATE_STABLE;
+ goto print_state;
+ }
+
+ /* current_state == MERGED_PATTERN_STATE_ADDING */
+ if (mp->next_state == MERGED_PATTERN_STATE_REMOVING) {
+ mp->current_state = MERGED_PATTERN_STATE_REMOVING;
+ mp->next_state = MERGED_PATTERN_STATE_STABLE;
+ merged_pattern_send_remove(mp);
+ goto print_state;
+ } else if (mp->next_state == MERGED_PATTERN_STATE_ADDING) {
+ /* To re-add a just added pattern, we need to remove it first */
+ mp->current_state = MERGED_PATTERN_STATE_REMOVING;
+ mp->next_state = MERGED_PATTERN_STATE_ADDING;
+ merged_pattern_send_remove(mp);
+ goto print_state;
+ }
+
+ /* No more operations */
+ mp->current_state = MERGED_PATTERN_STATE_STABLE;
+ mp->next_state = MERGED_PATTERN_STATE_STABLE;
+
+print_state:
+ DBG("Monitor state: %s -> %s",
+ get_merged_pattern_state_name(mp->current_state),
+ get_merged_pattern_state_name(mp->next_state));
+}
+
/* Frees a monitor object */
static void monitor_free(struct adv_monitor *monitor)
{
queue_destroy(monitor->devices, monitor_device_free);
monitor->devices = NULL;
- queue_destroy(monitor->patterns, pattern_free);
-
free(monitor);
}
{
/* Release() method on a monitor can be called when -
* 1. monitor initialization failed
- * 2. app calls UnregisterMonitor and monitors held by app are released
+ * 2. app calls UnregisterMonitor and monitors held by app are released,
+ * it may or may not be activated at this point
* 3. monitor is removed by kernel
*/
if (monitor->state != MONITOR_STATE_FAILED &&
+ monitor->state != MONITOR_STATE_INITED &&
monitor->state != MONITOR_STATE_ACTIVE &&
monitor->state != MONITOR_STATE_REMOVED) {
return;
NULL);
}
-/* Handles the callback of Remove Adv Monitor command */
-static void remove_adv_monitor_cb(uint8_t status, uint16_t length,
- const void *param, void *user_data)
-{
- const struct mgmt_rp_remove_adv_monitor *rp = param;
-
- if (status != MGMT_STATUS_SUCCESS || !param) {
- error("Failed to Remove Adv Monitor with status 0x%02x",
- status);
- return;
- }
-
- if (length < sizeof(*rp)) {
- error("Wrong size of Remove Adv Monitor response");
- return;
- }
-
- DBG("Adv monitor with handle:0x%04x removed from kernel",
- le16_to_cpu(rp->monitor_handle));
-}
-
-/* Sends Remove Adv Monitor command to the kernel */
+/* Removes monitor from the merged_pattern. This would result in removing it
+ * from the kernel if there is only one such monitor with that pattern.
+ */
static void monitor_remove(struct adv_monitor *monitor)
{
struct adv_monitor_app *app = monitor->app;
uint16_t adapter_id = app->manager->adapter_id;
- struct mgmt_cp_remove_adv_monitor cp;
+ struct adv_monitor_merged_pattern *merged_pattern;
+ const struct queue_entry *e;
+ struct rssi_parameters rssi;
/* Monitor from kernel can be removed when -
- * 1. already activated monitor object is deleted by app
+ * 1. monitor object is deleted by app - may or may not be activated
* 2. app is destroyed and monitors held by app are marked as released
*/
- if (monitor->state != MONITOR_STATE_ACTIVE &&
+ if (monitor->state != MONITOR_STATE_INITED &&
+ monitor->state != MONITOR_STATE_ACTIVE &&
monitor->state != MONITOR_STATE_RELEASED) {
return;
}
monitor->state = MONITOR_STATE_REMOVED;
- cp.monitor_handle = cpu_to_le16(monitor->monitor_handle);
-
- if (!mgmt_send(app->manager->mgmt, MGMT_OP_REMOVE_ADV_MONITOR,
- adapter_id, sizeof(cp), &cp, remove_adv_monitor_cb,
- app->manager, NULL)) {
+ if (!monitor->merged_pattern) {
btd_error(adapter_id,
- "Unable to send Remove Advt Monitor command");
+ "Merged_pattern not found when removing monitor");
+ return;
}
+
+ merged_pattern = monitor->merged_pattern;
+ monitor->merged_pattern = NULL;
+ queue_remove(merged_pattern->monitors, monitor);
+
+ /* No more monitors - just remove the pattern entirely */
+ if (queue_length(merged_pattern->monitors) == 0) {
+ merged_pattern_remove(merged_pattern);
+ return;
+ }
+
+ /* Calculate the merge result of the RSSIs of the monitors with the
+ * same pattern, minus the monitor being removed.
+ */
+ rssi_unset(&rssi);
+ for (e = queue_get_entries(merged_pattern->monitors); e; e = e->next) {
+ struct adv_monitor *m = e->data;
+
+ merge_rssi(&rssi, &m->rssi, &rssi);
+ }
+
+ merged_pattern_replace(merged_pattern, &rssi);
}
/* Destroys monitor object */
{
struct adv_monitor *monitor = data;
- if (!monitor && monitor->state != MONITOR_STATE_ACTIVE)
+ if (!monitor || (monitor->state != MONITOR_STATE_INITED
+ && monitor->state != MONITOR_STATE_ACTIVE))
return;
monitor->state = MONITOR_STATE_RELEASED;
}
+/* Updates monitor state to 'active' */
+static void monitor_state_active(void *data, void *user_data)
+{
+ struct adv_monitor *monitor = data;
+
+ if (!monitor || monitor->state != MONITOR_STATE_INITED)
+ return;
+
+ monitor->state = MONITOR_STATE_ACTIVE;
+
+ DBG("Calling Activate() on Adv Monitor of owner %s at path %s",
+ monitor->app->owner, monitor->path);
+
+ g_dbus_proxy_method_call(monitor->proxy, "Activate", NULL,
+ NULL, NULL, NULL);
+}
+
/* Handles a D-Bus disconnection event of an app */
static void app_disconnect_cb(DBusConnection *conn, void *user_data)
{
rssi_unset(&monitor->rssi);
monitor->devices = queue_new();
- monitor->type = MONITOR_TYPE_NONE;
- monitor->patterns = NULL;
-
return monitor;
}
for (t = supported_types; t->name; t++) {
if (strcmp(t->name, type_str) == 0) {
- monitor->type = t->type;
+ monitor->merged_pattern->type = t->type;
return true;
}
}
monitor->rssi.low_rssi, monitor->rssi.low_rssi_timeout,
monitor->rssi.sampling_period);
+ monitor->merged_pattern->rssi = monitor->rssi;
+
return true;
failed:
return false;
}
- monitor->patterns = queue_new();
-
if (dbus_message_iter_get_arg_type(&array) != DBUS_TYPE_ARRAY ||
dbus_message_iter_get_element_type(&array) !=
DBUS_TYPE_STRUCT) {
goto failed;
}
+ monitor->merged_pattern->patterns = queue_new();
+
dbus_message_iter_recurse(&array, &array_iter);
while (dbus_message_iter_get_arg_type(&array_iter) ==
if (!pattern)
goto failed;
- queue_push_tail(monitor->patterns, pattern);
+ queue_push_tail(monitor->merged_pattern->patterns, pattern);
dbus_message_iter_next(&array_iter);
}
/* There must be at least one pattern. */
- if (queue_isempty(monitor->patterns))
+ if (queue_isempty(monitor->merged_pattern->patterns))
goto failed;
return true;
failed:
- queue_destroy(monitor->patterns, pattern_free);
- monitor->patterns = NULL;
-
btd_error(adapter_id, "Invalid argument of property Patterns of the "
"Adv Monitor at path %s", path);
}
/* Processes the content of the remote Adv Monitor */
-static bool monitor_process(struct adv_monitor *monitor,
- struct adv_monitor_app *app)
+static bool monitor_process(struct adv_monitor *monitor)
{
const char *path = g_dbus_proxy_get_path(monitor->proxy);
monitor->state = MONITOR_STATE_FAILED;
+ monitor->merged_pattern = malloc0(sizeof(*monitor->merged_pattern));
+ monitor->merged_pattern->current_state = MERGED_PATTERN_STATE_STABLE;
+ monitor->merged_pattern->next_state = MERGED_PATTERN_STATE_STABLE;
+
if (!parse_monitor_type(monitor, path))
- goto done;
+ goto fail;
if (!parse_rssi_and_timeout(monitor, path))
- goto done;
+ goto fail;
+
+ if (monitor->merged_pattern->type != MONITOR_TYPE_OR_PATTERNS ||
+ !parse_patterns(monitor, path))
+ goto fail;
+
+ monitor->state = MONITOR_STATE_INITED;
+ monitor->merged_pattern->monitors = queue_new();
+ queue_push_tail(monitor->merged_pattern->monitors, monitor);
+
+ return true;
+
+fail:
+ merged_pattern_free(monitor->merged_pattern);
+ monitor->merged_pattern = NULL;
+ return false;
+}
+
+static void merged_pattern_destroy_monitors(
+ struct adv_monitor_merged_pattern *merged_pattern)
+{
+ const struct queue_entry *e;
- if (monitor->type == MONITOR_TYPE_OR_PATTERNS &&
- parse_patterns(monitor, path)) {
- monitor->state = MONITOR_STATE_INITED;
+ for (e = queue_get_entries(merged_pattern->monitors); e; e = e->next) {
+ struct adv_monitor *monitor = e->data;
+
+ monitor->merged_pattern = NULL;
+ monitor_destroy(monitor);
}
+}
-done:
- return monitor->state != MONITOR_STATE_FAILED;
+/* Handles the callback of Remove Adv Monitor command */
+static void remove_adv_monitor_cb(uint8_t status, uint16_t length,
+ const void *param, void *user_data)
+{
+ const struct mgmt_rp_remove_adv_monitor *rp = param;
+ struct adv_monitor_merged_pattern *merged_pattern = user_data;
+
+ if (status != MGMT_STATUS_SUCCESS || !param) {
+ error("Failed to Remove Adv Monitor with status 0x%02x",
+ status);
+ goto fail;
+ }
+
+ if (length < sizeof(*rp)) {
+ error("Wrong size of Remove Adv Monitor response");
+ goto fail;
+ }
+
+ DBG("Adv monitor with handle:0x%04x removed from kernel",
+ le16_to_cpu(rp->monitor_handle));
+
+ merged_pattern_process_next_step(merged_pattern);
+
+ if (merged_pattern->current_state == MERGED_PATTERN_STATE_STABLE)
+ merged_pattern_free(merged_pattern);
+
+ return;
+
+fail:
+ merged_pattern_destroy_monitors(merged_pattern);
+ merged_pattern_free(merged_pattern);
+}
+
+/* sends MGMT_OP_REMOVE_ADV_MONITOR */
+static void merged_pattern_send_remove(
+ struct adv_monitor_merged_pattern *merged_pattern)
+{
+ struct mgmt_cp_remove_adv_monitor cp;
+ struct btd_adv_monitor_manager *manager = merged_pattern->manager;
+
+ cp.monitor_handle = cpu_to_le16(merged_pattern->monitor_handle);
+
+ if (!mgmt_send(manager->mgmt, MGMT_OP_REMOVE_ADV_MONITOR,
+ manager->adapter_id, sizeof(cp), &cp,
+ remove_adv_monitor_cb, merged_pattern, NULL)) {
+ btd_error(merged_pattern->manager->adapter_id,
+ "Unable to send Remove Advt Monitor command");
+ }
}
/* Handles the callback of Add Adv Patterns Monitor command */
const void *param, void *user_data)
{
const struct mgmt_rp_add_adv_patterns_monitor *rp = param;
- struct adv_monitor *monitor = user_data;
- uint16_t adapter_id = monitor->app->manager->adapter_id;
+ struct adv_monitor_merged_pattern *merged_pattern = user_data;
+ uint16_t adapter_id = merged_pattern->manager->adapter_id;
if (status != MGMT_STATUS_SUCCESS || !param) {
btd_error(adapter_id,
"Failed to Add Adv Patterns Monitor with status"
" 0x%02x", status);
- monitor->state = MONITOR_STATE_FAILED;
- monitor_destroy(monitor);
- return;
+ goto fail;
}
if (length < sizeof(*rp)) {
btd_error(adapter_id, "Wrong size of Add Adv Patterns Monitor "
"response");
- monitor->state = MONITOR_STATE_FAILED;
- monitor_destroy(monitor);
- return;
+ goto fail;
}
- monitor->monitor_handle = le16_to_cpu(rp->monitor_handle);
- monitor->state = MONITOR_STATE_ACTIVE;
+ merged_pattern->monitor_handle = le16_to_cpu(rp->monitor_handle);
+ DBG("Adv monitor with handle:0x%04x added",
+ merged_pattern->monitor_handle);
- DBG("Calling Activate() on Adv Monitor of owner %s at path %s",
- monitor->app->owner, monitor->path);
+ merged_pattern_process_next_step(merged_pattern);
- g_dbus_proxy_method_call(monitor->proxy, "Activate", NULL, NULL, NULL,
- NULL);
+ if (merged_pattern->current_state != MERGED_PATTERN_STATE_STABLE)
+ return;
+
+ queue_foreach(merged_pattern->monitors, monitor_state_active, NULL);
+
+ return;
- DBG("Adv monitor with handle:0x%04x added", monitor->monitor_handle);
+fail:
+ merged_pattern_destroy_monitors(merged_pattern);
+ merged_pattern_free(merged_pattern);
}
/* sends MGMT_OP_ADD_ADV_PATTERNS_MONITOR */
-static bool monitor_send_add_pattern(struct adv_monitor *monitor)
+static bool merged_pattern_send_add_pattern(
+ struct adv_monitor_merged_pattern *merged_pattern)
{
struct mgmt_cp_add_adv_monitor *cp = NULL;
uint8_t pattern_count, cp_len;
const struct queue_entry *e;
bool success = true;
- pattern_count = queue_length(monitor->patterns);
+ pattern_count = queue_length(merged_pattern->patterns);
cp_len = sizeof(*cp) + pattern_count * sizeof(struct mgmt_adv_pattern);
cp = malloc0(cp_len);
if (!cp)
return false;
- for (e = queue_get_entries(monitor->patterns); e; e = e->next) {
+ for (e = queue_get_entries(merged_pattern->patterns); e; e = e->next) {
struct bt_ad_pattern *pattern = e->data;
memcpy(&cp->patterns[cp->pattern_count++], pattern,
sizeof(*pattern));
}
- if (!mgmt_send(monitor->app->manager->mgmt,
+ if (!mgmt_send(merged_pattern->manager->mgmt,
MGMT_OP_ADD_ADV_PATTERNS_MONITOR,
- monitor->app->manager->adapter_id, cp_len, cp,
- add_adv_patterns_monitor_cb, monitor, NULL)) {
+ merged_pattern->manager->adapter_id, cp_len, cp,
+ add_adv_patterns_monitor_cb, merged_pattern, NULL)) {
error("Unable to send Add Adv Patterns Monitor command");
success = false;
}
}
/* sends MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI */
-static bool monitor_send_add_pattern_rssi(struct adv_monitor *monitor)
+static bool merged_pattern_send_add_pattern_rssi(
+ struct adv_monitor_merged_pattern *merged_pattern)
{
struct mgmt_cp_add_adv_patterns_monitor_rssi *cp = NULL;
uint8_t pattern_count, cp_len;
const struct queue_entry *e;
bool success = true;
- pattern_count = queue_length(monitor->patterns);
+ pattern_count = queue_length(merged_pattern->patterns);
cp_len = sizeof(*cp) + pattern_count * sizeof(struct mgmt_adv_pattern);
cp = malloc0(cp_len);
if (!cp)
return false;
- cp->rssi.high_threshold = monitor->rssi.high_rssi;
+ cp->rssi.high_threshold = merged_pattern->rssi.high_rssi;
/* High threshold timeout is unsupported in kernel. Value must be 0. */
cp->rssi.high_threshold_timeout = 0;
- cp->rssi.low_threshold = monitor->rssi.low_rssi;
- cp->rssi.low_threshold_timeout = htobs(monitor->rssi.low_rssi_timeout);
- cp->rssi.sampling_period = monitor->rssi.sampling_period;
+ cp->rssi.low_threshold = merged_pattern->rssi.low_rssi;
+ cp->rssi.low_threshold_timeout =
+ htobs(merged_pattern->rssi.low_rssi_timeout);
+ cp->rssi.sampling_period = merged_pattern->rssi.sampling_period;
- for (e = queue_get_entries(monitor->patterns); e; e = e->next) {
+ for (e = queue_get_entries(merged_pattern->patterns); e; e = e->next) {
struct bt_ad_pattern *pattern = e->data;
memcpy(&cp->patterns[cp->pattern_count++], pattern,
sizeof(*pattern));
}
- if (!mgmt_send(monitor->app->manager->mgmt,
+ if (!mgmt_send(merged_pattern->manager->mgmt,
MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI,
- monitor->app->manager->adapter_id, cp_len, cp,
- add_adv_patterns_monitor_cb, monitor, NULL)) {
+ merged_pattern->manager->adapter_id, cp_len, cp,
+ add_adv_patterns_monitor_cb, merged_pattern, NULL)) {
error("Unable to send Add Adv Patterns Monitor RSSI command");
success = false;
}
return success;
}
+/* Sends mgmt command to kernel for adding monitor */
+static void merged_pattern_send_add(
+ struct adv_monitor_merged_pattern *merged_pattern)
+{
+ if (rssi_is_unset(&merged_pattern->rssi))
+ merged_pattern_send_add_pattern(merged_pattern);
+ else
+ merged_pattern_send_add_pattern_rssi(merged_pattern);
+}
+
/* Handles an Adv Monitor D-Bus proxy added event */
static void monitor_proxy_added_cb(GDBusProxy *proxy, void *user_data)
{
struct adv_monitor *monitor;
struct adv_monitor_app *app = user_data;
+ struct adv_monitor_merged_pattern *existing_pattern;
uint16_t adapter_id = app->manager->adapter_id;
const char *path = g_dbus_proxy_get_path(proxy);
const char *iface = g_dbus_proxy_get_interface(proxy);
+ struct rssi_parameters rssi;
if (strcmp(iface, ADV_MONITOR_INTERFACE) != 0 ||
!g_str_has_prefix(path, app->path)) {
return;
}
- if (!monitor_process(monitor, app)) {
+ if (!monitor_process(monitor)) {
monitor_destroy(monitor);
DBG("Adv Monitor at path %s released due to invalid content",
path);
queue_push_tail(app->monitors, monitor);
- if (rssi_is_unset(&monitor->rssi))
- monitor_send_add_pattern(monitor);
- else
- monitor_send_add_pattern_rssi(monitor);
+ existing_pattern = queue_find(monitor->app->manager->merged_patterns,
+ merged_pattern_is_equal,
+ monitor->merged_pattern);
+
+ if (!existing_pattern) {
+ monitor->merged_pattern->manager = monitor->app->manager;
+ queue_push_tail(monitor->app->manager->merged_patterns,
+ monitor->merged_pattern);
+ merged_pattern_add(monitor->merged_pattern);
+ } else {
+ /* Since there is a matching pattern, abandon the one we have */
+ merged_pattern_free(monitor->merged_pattern);
+ monitor->merged_pattern = existing_pattern;
+ queue_push_tail(existing_pattern->monitors, monitor);
+
+ merge_rssi(&existing_pattern->rssi, &monitor->rssi, &rssi);
+ merged_pattern_replace(existing_pattern, &rssi);
+
+ /* Stable means request is not forwarded to kernel */
+ if (existing_pattern->current_state ==
+ MERGED_PATTERN_STATE_STABLE)
+ monitor_state_active(monitor, NULL);
+ }
DBG("Adv Monitor allocated for the object at path %s", path);
}
{ }
};
-/* Matches a monitor based on its handle */
-static bool removed_monitor_match(const void *data, const void *user_data)
-{
- const uint16_t *handle = user_data;
- const struct adv_monitor *monitor = data;
-
- if (!data || !handle)
- return false;
-
- return monitor->monitor_handle == *handle;
-}
-
/* Updates monitor state to 'removed' */
static void monitor_state_removed(void *data, void *user_data)
{
struct adv_monitor *monitor = data;
- if (!monitor && monitor->state != MONITOR_STATE_ACTIVE)
+ if (!monitor || (monitor->state != MONITOR_STATE_INITED
+ && monitor->state != MONITOR_STATE_ACTIVE))
return;
monitor->state = MONITOR_STATE_REMOVED;
-
- DBG("Adv monitor with handle:0x%04x removed by kernel",
- monitor->monitor_handle);
+ monitor->merged_pattern = NULL;
}
-/* Remove the matched monitor and reports the removal to the app */
-static void app_remove_monitor(void *data, void *user_data)
+/* Remove the matched merged_pattern and remove the monitors */
+static void remove_merged_pattern(void *data, void *user_data)
{
- struct adv_monitor_app *app = data;
- struct adv_monitor *monitor;
+ struct adv_monitor_merged_pattern *merged_pattern = data;
uint16_t *handle = user_data;
- if (handle && *handle == 0) {
- /* handle = 0 indicates kernel has removed all monitors */
- queue_foreach(app->monitors, monitor_state_removed, NULL);
- queue_destroy(app->monitors, monitor_destroy);
+ if (!handle)
+ return;
+ /* handle = 0 indicates kernel has removed all monitors */
+ if (handle != 0 && *handle != merged_pattern->monitor_handle)
return;
- }
- monitor = queue_find(app->monitors, removed_monitor_match, handle);
- if (monitor) {
- DBG("Adv Monitor at path %s removed", monitor->path);
+ DBG("Adv monitor with handle:0x%04x removed by kernel",
+ merged_pattern->monitor_handle);
- monitor_state_removed(monitor, NULL);
- monitor_destroy(monitor);
- }
+ queue_foreach(merged_pattern->monitors, monitor_state_removed, NULL);
+ queue_destroy(merged_pattern->monitors, monitor_destroy);
+ merged_pattern_free(merged_pattern);
}
/* Processes Adv Monitor removed event from kernel */
return;
}
- /* Traverse the apps to find the monitor */
- queue_foreach(manager->apps, app_remove_monitor, &handle);
+ /* Traverse the merged_patterns to find matching pattern */
+ queue_foreach(manager->merged_patterns, remove_merged_pattern, &handle);
DBG("Adv Monitor removed event with handle 0x%04x processed",
ev->monitor_handle);
manager->mgmt = mgmt_ref(mgmt);
manager->adapter_id = btd_adapter_get_index(adapter);
manager->apps = queue_new();
+ manager->merged_patterns = queue_new();
mgmt_register(manager->mgmt, MGMT_EV_ADV_MONITOR_REMOVED,
manager->adapter_id, adv_monitor_removed_callback,
mgmt_unref(manager->mgmt);
queue_destroy(manager->apps, app_destroy);
+ queue_destroy(manager->merged_patterns, merged_pattern_free);
free(manager);
}
{
struct adv_monitor *monitor = data;
struct adv_content_filter_info *info = user_data;
+ struct queue *patterns;
if (!monitor) {
error("Unexpected NULL adv_monitor object upon match");
if (monitor->state != MONITOR_STATE_ACTIVE)
return;
- if (monitor->type == MONITOR_TYPE_OR_PATTERNS &&
- bt_ad_pattern_match(info->ad, monitor->patterns)) {
+ if (!monitor->merged_pattern)
+ return;
+
+ patterns = monitor->merged_pattern->patterns;
+ if (monitor->merged_pattern->type == MONITOR_TYPE_OR_PATTERNS &&
+ bt_ad_pattern_match(info->ad, patterns)) {
goto matched;
}