Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | /* uuid.c - Bluetooth UUID handling */
/*
* Copyright (c) 2015-2016 Intel Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <string.h>
#include <errno.h>
#include <misc/byteorder.h>
#include <bluetooth/uuid.h>
#if defined(CONFIG_BLUETOOTH_DEBUG)
#include <stdio.h>
#endif /* CONFIG_BLUETOOTH_DEBUG */
#define UUID_16_BASE_OFFSET 12
/* TODO: Decide whether to continue using BLE format or switch to RFC 4122 */
/* Base UUID : 0000[0000]-0000-1000-8000-00805F9B34FB ->
* { 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
* 0x00, 0x10, 0x00, 0x00, [0x00, 0x00], 0x00, 0x00 }
* 0x2800 : 0000[2800]-0000-1000-8000-00805F9B34FB ->
* { 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80,
* 0x00, 0x10, 0x00, 0x00, [0x00, 0x28], 0x00, 0x00 }
* little endian 0x2800 : [00 28] -> no swapping required
* big endian 0x2800 : [28 00] -> swapping required
*/
static const struct bt_uuid_128 uuid128_base = {
.uuid.type = BT_UUID_TYPE_128,
.val = { 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_128 *dst)
{
switch (src->type) {
case BT_UUID_TYPE_16:
*dst = uuid128_base;
sys_put_le16(BT_UUID_16(src)->val,
&dst->val[UUID_16_BASE_OFFSET]);
return;
case BT_UUID_TYPE_32:
*dst = uuid128_base;
sys_put_le32(BT_UUID_32(src)->val,
&dst->val[UUID_16_BASE_OFFSET]);
return;
case BT_UUID_TYPE_128:
memcpy(dst, src, sizeof(*dst));
return;
}
}
static int uuid128_cmp(const struct bt_uuid *u1, const struct bt_uuid *u2)
{
struct bt_uuid_128 uuid1, uuid2;
uuid_to_uuid128(u1, &uuid1);
uuid_to_uuid128(u2, &uuid2);
return memcmp(uuid1.val, uuid2.val, 16);
}
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_TYPE_16:
return (int)BT_UUID_16(u1)->val - (int)BT_UUID_16(u2)->val;
case BT_UUID_TYPE_32:
return (int)BT_UUID_32(u1)->val - (int)BT_UUID_32(u2)->val;
case BT_UUID_TYPE_128:
return memcmp(BT_UUID_128(u1)->val, BT_UUID_128(u2)->val, 16);
}
return -EINVAL;
}
#if defined(CONFIG_BLUETOOTH_DEBUG)
void bt_uuid_to_str(const struct bt_uuid *uuid, char *str, size_t len)
{
uint32_t tmp1, tmp5;
uint16_t tmp0, tmp2, tmp3, tmp4;
switch (uuid->type) {
case BT_UUID_TYPE_16:
snprintf(str, len, "%.4x", BT_UUID_16(uuid)->val);
break;
case BT_UUID_TYPE_32:
snprintf(str, len, "%.4x", BT_UUID_32(uuid)->val);
break;
case BT_UUID_TYPE_128:
memcpy(&tmp0, &BT_UUID_128(uuid)->val[0], sizeof(tmp0));
memcpy(&tmp1, &BT_UUID_128(uuid)->val[2], sizeof(tmp1));
memcpy(&tmp2, &BT_UUID_128(uuid)->val[6], sizeof(tmp2));
memcpy(&tmp3, &BT_UUID_128(uuid)->val[8], sizeof(tmp3));
memcpy(&tmp4, &BT_UUID_128(uuid)->val[10], sizeof(tmp4));
memcpy(&tmp5, &BT_UUID_128(uuid)->val[12], sizeof(tmp5));
snprintf(str, len, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x",
tmp5, tmp4, tmp3, tmp2, tmp1, tmp0);
break;
default:
memset(str, 0, len);
return;
}
}
const char *bt_uuid_str(const struct bt_uuid *uuid)
{
static char str[37];
bt_uuid_to_str(uuid, str, sizeof(str));
return str;
}
#endif /* CONFIG_BLUETOOTH_DEBUG */
|