127 lines
4.2 KiB
C
127 lines
4.2 KiB
C
/****************************************************************************
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* wireless/bluetooth/bt_uuid.c
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* Bluetooth UUID handling.
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Ported from the Intel/Zephyr arduino101_firmware_source-v1.tar package
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* where the code was released with a compatible 3-clause BSD license:
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*
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* Copyright (c) 2016, Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS
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* ; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <string.h>
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#include <errno.h>
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#include <nuttx/wireless/bluetooth/bt_uuid.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* TODO: Decide whether to continue using BLE format or switch to RFC 4122 */
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static const struct bt_uuid_s g_uuid128_base =
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{
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.type = BT_UUID_128,
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.u.u128 =
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{
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0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
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0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
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}
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static void uuid_to_uuid128(FAR const struct bt_uuid_s *src,
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FAR struct bt_uuid_s *dst)
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{
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switch (src->type)
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{
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case BT_UUID_16:
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*dst = g_uuid128_base;
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memcpy(&dst->u.u128[2], &src->u.u16, sizeof(src->u.u16));
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return;
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case BT_UUID_128:
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memcpy(dst, src, sizeof(*dst));
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return;
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}
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}
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static int uuid128_cmp(FAR const struct bt_uuid_s *u1,
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FAR const struct bt_uuid_s *u2)
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{
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struct bt_uuid_s uuid1;
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struct bt_uuid_s uuid2;
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uuid_to_uuid128(u1, &uuid1);
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uuid_to_uuid128(u2, &uuid2);
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return memcmp(uuid1.u.u128, uuid2.u.u128, sizeof(uuid1.u.u128));
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int bt_uuid_cmp(FAR const struct bt_uuid_s *u1,
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FAR const struct bt_uuid_s *u2)
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{
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/* Convert to 128 bit if types don't match */
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if (u1->type != u2->type)
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{
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return uuid128_cmp(u1, u2);
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}
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switch (u1->type)
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{
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case BT_UUID_16:
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return (int)u1->u.u16 - (int)u2->u.u16;
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case BT_UUID_128:
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return memcmp(u1->u.u128, u2->u.u128, sizeof(u1->u.u128));
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}
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return -EINVAL;
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}
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