This patch adds a list of 'advertising entry' to the struct hci_dev.
The advertising entry (struct adv_entry) stores sensitive information
(bdaddr and bdaddr_type so far) gathered from LE advertising report
events.
A double-linked list (list_head adv_entries) is used to store those
advertising entries. Only advertising entries from connectables devices
are inserted into the list.
Signed-off-by: Andre Guedes <andre.guedes@xxxxxxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 12 ++++++
net/bluetooth/hci_core.c | 69 ++++++++++++++++++++++++++++++++++++++
net/bluetooth/hci_event.c | 5 +--
3 files changed, 83 insertions(+), 3 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index c59e857..970711d 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -82,6 +82,12 @@ struct link_key {
u8 pin_len;
};
+struct adv_entry {
+ struct list_head list;
+ bdaddr_t bdaddr;
+ u8 bdaddr_type;
+};
+
#define NUM_REASSEMBLY 4
struct hci_dev {
struct list_head list;
@@ -171,6 +177,8 @@ struct hci_dev {
struct list_head link_keys;
+ struct list_head adv_entries;
+
struct hci_dev_stats stat;
struct sk_buff_head driver_init;
@@ -508,6 +516,10 @@ int hci_add_link_key(struct hci_dev *hdev, int new_key, bdaddr_t *bdaddr,
u8 *key, u8 type, u8 pin_len);
int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr);
+struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr);
+int hci_add_adv_entry(struct hci_dev *hdev,
+ struct hci_ev_le_advertising_info *ev);
+
void hci_del_off_timer(struct hci_dev *hdev);
void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index ff67843..cbff329 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1080,6 +1080,72 @@ static void hci_cmd_timer(unsigned long arg)
tasklet_schedule(&hdev->cmd_task);
}
+static int hci_adv_entries_clear(struct hci_dev *hdev)
+{
+ struct list_head *p, *n;
+
+ list_for_each_safe(p, n, &hdev->adv_entries) {
+ struct adv_entry *entry;
+
+ entry = list_entry(p, struct adv_entry, list);
+
+ list_del(p);
+ kfree(entry);
+ }
+
+ return 0;
+}
+
+struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
+{
+ struct list_head *p;
+
+ list_for_each(p, &hdev->adv_entries) {
+ struct adv_entry *entry;
+
+ entry = list_entry(p, struct adv_entry, list);
+
+ if (bacmp(bdaddr, &entry->bdaddr) == 0)
+ return entry;
+ }
+
+ return NULL;
+}
+
+static inline int is_connectable_adv(u8 evt_type)
+{
+ if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
+ return 1;
+
+ return 0;
+}
+
+int hci_add_adv_entry(struct hci_dev *hdev,
+ struct hci_ev_le_advertising_info *ev)
+{
+ struct adv_entry *entry;
+
+ if (!is_connectable_adv(ev->evt_type))
+ return -EINVAL;
+
+ entry = hci_find_adv_entry(hdev, &ev->bdaddr);
+ /* Only new entries should be added to adv_entries. So, if
+ * bdaddr was found, don't add it. */
+ if (entry)
+ return 0;
+
+ entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
+ if (!entry)
+ return -ENOMEM;
+
+ bacpy(&entry->bdaddr, &ev->bdaddr);
+ entry->bdaddr_type = ev->bdaddr_type;
+
+ list_add(&entry->list, &hdev->adv_entries);
+
+ return 0;
+}
+
static struct crypto_blkcipher *alloc_cypher(void)
{
if (enable_smp)
@@ -1152,6 +1218,8 @@ int hci_register_dev(struct hci_dev *hdev)
INIT_LIST_HEAD(&hdev->link_keys);
+ INIT_LIST_HEAD(&hdev->adv_entries);
+
INIT_WORK(&hdev->power_on, hci_power_on);
INIT_WORK(&hdev->power_off, hci_power_off);
setup_timer(&hdev->off_timer, hci_auto_off, (unsigned long) hdev);
@@ -1239,6 +1307,7 @@ int hci_unregister_dev(struct hci_dev *hdev)
hci_blacklist_clear(hdev);
hci_uuids_clear(hdev);
hci_link_keys_clear(hdev);
+ hci_adv_entries_clear(hdev);
hci_dev_unlock_bh(hdev);
__hci_dev_put(hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 55502ac..5019b76 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2564,12 +2564,11 @@ static inline void hci_le_adv_report_evt(struct hci_dev *hdev,
num_reports = skb->data[0];
ev = (void *) &skb->data[1];
-
- BT_DBG("adv from: %s", batostr(&ev->bdaddr));
+ hci_add_adv_entry(hdev, ev);
while (--num_reports) {
ev = (void *) (ev->data + ev->length + 1);
- BT_DBG("adv from: %s", batostr(&ev->bdaddr));
+ hci_add_adv_entry(hdev, ev);
}
}
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
