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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 <assert.h>
#include <stdio.h>
#include <string.h>
#include "services/gap/ble_svc_gap.h"
#include "bsp/bsp.h"
#include "host/ble_hs.h"
#include "host/ble_uuid.h"
#include "mesh.h"
#include "board.h"
#include "mesh_badge.h"
static const ble_uuid16_t gatt_cud_uuid = BLE_UUID16_INIT(0x2901);
static const ble_uuid16_t gatt_cpf_uuid = BLE_UUID16_INIT(0x2904);
/** @brief GATT Characteristic Presentation Format Attribute Value. */
struct bt_gatt_cpf {
/** Format of the value of the characteristic */
uint8_t format;
/** Exponent field to determine how the value of this characteristic is further formatted */
int8_t exponent;
/** Unit of the characteristic */
uint16_t unit;
/** Name space of the description */
uint8_t name_space;
/** Description of the characteristic as defined in a higher layer profile */
uint16_t description;
} __packed;
#define CPF_FORMAT_UTF8 0x19
static const struct bt_gatt_cpf name_cpf = {
.format = CPF_FORMAT_UTF8,
};
static const ble_uuid128_t name_uuid = BLE_UUID128_INIT(
0xf0, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12,
0x78, 0x56, 0x34, 0x12, 0x78, 0x56, 0x34, 0x12);
static const ble_uuid128_t name_enc_uuid = BLE_UUID128_INIT(
0xf1, 0xde, 0xbc, 0x9a, 0x78, 0x56, 0x34, 0x12,
0x78, 0x56, 0x34, 0x12, 0x78, 0x56, 0x34, 0x12);
static int
gatt_svr_chr_access(uint16_t conn_handle, uint16_t attr_handle,
struct ble_gatt_access_ctxt *ctxt,
void *arg);
static const struct ble_gatt_svc_def gatt_svr_svcs[] = {
{
.type = BLE_GATT_SVC_TYPE_PRIMARY,
.uuid = &name_uuid.u,
.characteristics = (struct ble_gatt_chr_def[]) { {
.uuid = &name_enc_uuid.u,
.access_cb = gatt_svr_chr_access,
.flags = BLE_GATT_CHR_F_READ |
BLE_GATT_CHR_F_WRITE | BLE_GATT_CHR_F_WRITE_ENC,
.descriptors = (struct ble_gatt_dsc_def[]) { {
.uuid = &gatt_cud_uuid.u,
.access_cb = gatt_svr_chr_access,
.att_flags = BLE_ATT_F_READ,
}, {
.uuid = &gatt_cpf_uuid.u,
.access_cb = gatt_svr_chr_access,
.att_flags = BLE_ATT_F_READ,
}, {
0, /* No more descriptors in this characteristic. */
} }
}, {
0, /* No more characteristics in this service. */
} },
},
{
0, /* No more services. */
},
};
static int read_name(struct os_mbuf *om)
{
const char *value = bt_get_name();
int rc;
rc = os_mbuf_append(om, value, (uint16_t) strlen(value));
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
}
static int write_name(struct os_mbuf *om)
{
char name[MYNEWT_VAL(BLE_SVC_GAP_DEVICE_NAME_MAX_LENGTH)];
uint16_t len;
uint16_t om_len;
int rc;
om_len = OS_MBUF_PKTLEN(om);
if (om_len >= sizeof(name)) {
return BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN;
}
rc = ble_hs_mbuf_to_flat(om, name, sizeof(name) - 1, &len);
if (rc != 0) {
return BLE_ATT_ERR_UNLIKELY;
}
name[len] = '\0';
rc = bt_set_name(name);
if (rc) {
return BLE_ATT_ERR_INSUFFICIENT_RES;
}
board_refresh_display();
return 0;
}
static int
gatt_svr_chr_access(uint16_t conn_handle, uint16_t attr_handle,
struct ble_gatt_access_ctxt *ctxt,
void *arg)
{
const ble_uuid_t *uuid;
int rc;
uuid = ctxt->chr->uuid;
if (ble_uuid_cmp(uuid, &name_enc_uuid.u) == 0) {
switch (ctxt->op) {
case BLE_GATT_ACCESS_OP_READ_CHR:
rc = read_name(ctxt->om);
return rc;
case BLE_GATT_ACCESS_OP_WRITE_CHR:
rc = write_name(ctxt->om);
return rc;
default:
assert(0);
return BLE_ATT_ERR_UNLIKELY;
}
} else if (ble_uuid_cmp(uuid, &gatt_cud_uuid.u) == 0) {
rc = os_mbuf_append(ctxt->om, "Badge Name",
(uint16_t) strlen("Badge Name"));
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
} else if (ble_uuid_cmp(uuid, &gatt_cpf_uuid.u) == 0) {
rc = os_mbuf_append(ctxt->om, &name_cpf,
(uint16_t) sizeof(name_cpf));
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
}
/* Unknown characteristic; the nimble stack should not have called this
* function.
*/
assert(0);
return BLE_ATT_ERR_UNLIKELY;
}
void
gatt_svr_register_cb(struct ble_gatt_register_ctxt *ctxt, void *arg)
{
char buf[BLE_UUID_STR_LEN];
switch (ctxt->op) {
case BLE_GATT_REGISTER_OP_SVC:
MODLOG_DFLT(DEBUG, "registered service %s with handle=%d\n",
ble_uuid_to_str(ctxt->svc.svc_def->uuid, buf),
ctxt->svc.handle);
break;
case BLE_GATT_REGISTER_OP_CHR:
MODLOG_DFLT(DEBUG, "registering characteristic %s with "
"def_handle=%d val_handle=%d\n",
ble_uuid_to_str(ctxt->chr.chr_def->uuid, buf),
ctxt->chr.def_handle,
ctxt->chr.val_handle);
break;
case BLE_GATT_REGISTER_OP_DSC:
MODLOG_DFLT(DEBUG, "registering descriptor %s with handle=%d\n",
ble_uuid_to_str(ctxt->dsc.dsc_def->uuid, buf),
ctxt->dsc.handle);
break;
default:
assert(0);
break;
}
}
int
gatt_svr_init(void)
{
int rc;
rc = ble_gatts_count_cfg(gatt_svr_svcs);
if (rc != 0) {
return rc;
}
rc = ble_gatts_add_svcs(gatt_svr_svcs);
if (rc != 0) {
return rc;
}
return 0;
}
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