Return-Path: From: Andre Guedes To: linux-bluetooth@vger.kernel.org Cc: Andre Guedes Subject: [PATCH v2 02/11] Bluetooth: LE advertising cache Date: Fri, 20 May 2011 21:10:36 -0300 Message-Id: <1305936645-15007-2-git-send-email-andre.guedes@openbossa.org> In-Reply-To: <1305936645-15007-1-git-send-email-andre.guedes@openbossa.org> References: <1305936645-15007-1-git-send-email-andre.guedes@openbossa.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: This patch implements the LE advertising cache. It stores sensitive information (bdaddr and bdaddr_type so far) gathered from LE advertising report events. Only advertising entries from connectables devices are added to the cache. Signed-off-by: Andre Guedes --- include/net/bluetooth/hci_core.h | 13 ++++++++ net/bluetooth/hci_core.c | 64 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+), 0 deletions(-) diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index 6c994c0..10dfb85 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -89,6 +89,12 @@ struct oob_data { u8 randomizer[16]; }; +struct adv_entry { + struct list_head list; + bdaddr_t bdaddr; + u8 bdaddr_type; +}; + #define NUM_REASSEMBLY 4 struct hci_dev { struct list_head list; @@ -181,6 +187,8 @@ struct hci_dev { struct list_head remote_oob_data; + struct list_head adv_entries; + struct hci_dev_stats stat; struct sk_buff_head driver_init; @@ -527,6 +535,11 @@ int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, u8 *randomizer); int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr); +int hci_adv_entries_clear(struct hci_dev *hdev); +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 b6bda3f..dd27f97 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -1204,6 +1204,67 @@ int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, return 0; } +int hci_adv_entries_clear(struct hci_dev *hdev) +{ + struct adv_entry *entry, *tmp; + + list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) { + list_del(&entry->list); + kfree(entry); + } + + BT_DBG("%s adv cache cleared", hdev->name); + + return 0; +} + +struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr) +{ + struct adv_entry *entry; + + list_for_each_entry(entry, &hdev->adv_entries, 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; + + /* Only new entries should be added to adv_entries. So, if + * bdaddr was found, don't add it. */ + if (hci_find_adv_entry(hdev, &ev->bdaddr)) + 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); + + BT_DBG("%s adv entry added: address %s type %u", hdev->name, + batostr(&entry->bdaddr), entry->bdaddr_type); + + return 0; +} + /* Register HCI device */ int hci_register_dev(struct hci_dev *hdev) { @@ -1270,6 +1331,8 @@ int hci_register_dev(struct hci_dev *hdev) INIT_LIST_HEAD(&hdev->remote_oob_data); + 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); @@ -1350,6 +1413,7 @@ int hci_unregister_dev(struct hci_dev *hdev) hci_uuids_clear(hdev); hci_link_keys_clear(hdev); hci_remote_oob_data_clear(hdev); + hci_adv_entries_clear(hdev); hci_dev_unlock_bh(hdev); __hci_dev_put(hdev); -- 1.7.4.1