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Bluetooth: Keep track of UUID type upon addition 

The primary purpose of the UUIDs is to enable generation of EIR and AD
data. In these data formats the UUIDs are split into separate fields
based on whether they're 16, 32 or 128 bit UUIDs. To make the generation
of these data fields simpler this patch adds a type member to the
bt_uuid struct and assigns a value to it as soon as the UUID is added to
the kernel. This way the type doesn't need to be calculated each time
the UUID list is later iterated.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Johan Hedberg 2013-01-27 00:31:29 +02:00 committed by Gustavo Padovan
parent 4821002ce2
commit 83be8eca2e
2 changed files with 24 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/bluetooth/hci_core.h
View File

@ -86,6 +86,7 @@ struct bdaddr_list {
struct bt_uuid {
struct list_head list;
u8 uuid[16];
u8 size;
u8 svc_hint;
};

48
net/bluetooth/mgmt.c
View File

@ -435,28 +435,6 @@ static u32 get_current_settings(struct hci_dev *hdev)
#define PNP_INFO_SVCLASS_ID 0x1200
static u8 bluetooth_base_uuid[] = {
0xFB, 0x34, 0x9B, 0x5F, 0x80, 0x00, 0x00, 0x80,
0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static u16 get_uuid16(u8 *uuid128)
{
u32 val;
int i;
for (i = 0; i < 12; i++) {
if (bluetooth_base_uuid[i] != uuid128[i])
return 0;
}
val = get_unaligned_le32(&uuid128[12]);
if (val > 0xffff)
return 0;
return (u16) val;
}
static void create_eir(struct hci_dev *hdev, u8 *data)
{
u8 *ptr = data;
@ -513,10 +491,10 @@ static void create_eir(struct hci_dev *hdev, u8 *data)
list_for_each_entry(uuid, &hdev->uuids, list) {
u16 uuid16;
uuid16 = get_uuid16(uuid->uuid);
if (uuid16 == 0)
return;
if (uuid->size != 16)
continue;
uuid16 = get_unaligned_le16(&uuid->uuid[12]);
if (uuid16 < 0x1100)
continue;
@ -1304,6 +1282,25 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
return err;
}
static const u8 bluetooth_base_uuid[] = {
0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static u8 get_uuid_size(const u8 *uuid)
{
u32 val;
if (memcmp(uuid, bluetooth_base_uuid, 12))
return 128;
val = get_unaligned_le32(&uuid[12]);
if (val > 0xffff)
return 32;
return 16;
}
static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
{
struct mgmt_cp_add_uuid *cp = data;
@ -1329,6 +1326,7 @@ static int add_uuid(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
memcpy(uuid->uuid, cp->uuid, 16);
uuid->svc_hint = cp->svc_hint;
uuid->size = get_uuid_size(cp->uuid);
list_add_tail(&uuid->list, &hdev->uuids);