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Bluetooth: Add bt_uuid_cmp

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bt_uuid_cmp compares 2 UUIDs returning if they match, if the types are
different it converts both to 128 bit format before performing the
comparison.

Change-Id: Iacf330cc0271a7e5429cbb2f405a7d9ef249a1a3
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2015-05-19 16:11:58 +03:00 • committed by Anas Nashif
commit 862835d8a6
2 changed files with 87 additions and 0 deletions
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2
include/bluetooth/uuid.h
View file

@ -65,4 +65,6 @@ struct bt_uuid {
};
};
int bt_uuid_cmp(const struct bt_uuid *u1, const struct bt_uuid *u2);
#endif /* __BT_UUID_H */

85
net/bluetooth/uuid.c Normal file
View file

@ -0,0 +1,85 @@
/* uuid.c - Bluetooth UUID handling */
/*
* Copyright (c) 2015 Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2) Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3) Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <nanokernel.h>
#include <toolchain.h>
#include <string.h>
#include <errno.h>
#include <bluetooth/uuid.h>
/* TODO: Decide wether to continue using BLE format or switch to RFC 4122 */
static const struct bt_uuid uuid128_base = {
.type = BT_UUID_128,
.u128 = { 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, 0x00, 0x10,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
};
static void uuid_to_uuid128(const struct bt_uuid *src, struct bt_uuid *dst)
{
switch (src->type) {
case BT_UUID_16:
*dst = uuid128_base;
memcpy(&dst->u128[2], &src->u16, sizeof(src->u16));
return;
case BT_UUID_128:
memcpy(dst, src, sizeof(*dst));
return;
}
}
static int uuid128_cmp(const struct bt_uuid *u1, const struct bt_uuid *u2)
{
struct bt_uuid uuid1, uuid2;
uuid_to_uuid128(u1, &uuid1);
uuid_to_uuid128(u2, &uuid2);
return memcmp(uuid1.u128, uuid2.u128, sizeof(uuid1.u128));
}
int bt_uuid_cmp(const struct bt_uuid *u1, const struct bt_uuid *u2)
{
/* Convert to 128 bit if types don't match */
if (u1->type != u2->type)
return uuid128_cmp(u1, u2);
switch (u1->type) {
case BT_UUID_16:
return (int)u1->u16 - (int)u2->u16;
case BT_UUID_128:
return memcmp(u1->u128, u2->u128, sizeof(u1->u128));
}
return -EINVAL;
}