static int
ble_svc_gap_access(uint16_t conn_handle, uint16_t attr_handle,
struct ble_gatt_access_ctxt *ctxt, void *arg)
{
uint16_t uuid16;
int rc;
uuid16 = ble_uuid_128_to_16(ctxt->chr->uuid128);
assert(uuid16 != 0);
switch (uuid16) {
case BLE_SVC_GAP_CHR_UUID16_DEVICE_NAME:
assert(ctxt->op == BLE_GATT_ACCESS_OP_READ_CHR);
rc = os_mbuf_append(ctxt->om, ble_svc_gap_name,
strlen(ble_svc_gap_name));
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
case BLE_SVC_GAP_CHR_UUID16_APPEARANCE:
assert(ctxt->op == BLE_GATT_ACCESS_OP_READ_CHR);
rc = os_mbuf_append(ctxt->om, &ble_svc_gap_appearance,
sizeof ble_svc_gap_appearance);
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
case BLE_SVC_GAP_CHR_UUID16_PERIPH_PRIV_FLAG:
assert(ctxt->op == BLE_GATT_ACCESS_OP_READ_CHR);
rc = os_mbuf_append(ctxt->om, &ble_svc_gap_privacy_flag,
sizeof ble_svc_gap_privacy_flag);
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
case BLE_SVC_GAP_CHR_UUID16_RECONNECT_ADDR:
assert(ctxt->op == BLE_GATT_ACCESS_OP_WRITE_CHR);
if (OS_MBUF_PKTLEN(ctxt->om) != sizeof ble_svc_gap_reconnect_addr) {
return BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN;
}
ble_hs_mbuf_to_flat(ctxt->om, ble_svc_gap_reconnect_addr,
sizeof ble_svc_gap_reconnect_addr, NULL);
return 0;
case BLE_SVC_GAP_CHR_UUID16_PERIPH_PREF_CONN_PARAMS:
assert(ctxt->op == BLE_GATT_ACCESS_OP_READ_CHR);
rc = os_mbuf_append(ctxt->om, &ble_svc_gap_pref_conn_params,
sizeof ble_svc_gap_pref_conn_params);
return rc == 0 ? 0 : BLE_ATT_ERR_INSUFFICIENT_RES;
default:
assert(0);
return BLE_ATT_ERR_UNLIKELY;
}
}
static int
gatt_svr_chr_write(struct os_mbuf *om, uint16_t min_len, uint16_t max_len,
void *dst, uint16_t *len)
{
uint16_t om_len;
int rc;
om_len = OS_MBUF_PKTLEN(om);
if (om_len < min_len || om_len > max_len) {
return BLE_ATT_ERR_INVALID_ATTR_VALUE_LEN;
}
rc = ble_hs_mbuf_to_flat(om, dst, max_len, len);
if (rc != 0) {
return BLE_ATT_ERR_UNLIKELY;
}
return 0;
}
static int gatt_svr_chr_access_rw_demo(
uint16_t conn_handle, uint16_t attr_handle,
struct ble_gatt_access_ctxt *ctxt, void *arg)
{
puts("service 'rw demo' callback triggered");
(void) conn_handle;
(void) attr_handle;
(void) arg;
int rc = 0;
ble_uuid_t* write_uuid = (ble_uuid_t*) &gatt_svr_chr_rw_demo_write_uuid.u;
ble_uuid_t* readonly_uuid = (ble_uuid_t*) &gatt_svr_chr_rw_demo_readonly_uuid.u;
if (ble_uuid_cmp(ctxt->chr->uuid, write_uuid) == 0) {
puts("access to characteristic 'rw demo (write)'");
switch (ctxt->op) {
case BLE_GATT_ACCESS_OP_READ_CHR:
puts("read from characteristic");
printf("current value of rm_demo_write_data: '%s'\n",
rm_demo_write_data);
/* send given data to the client */
rc = os_mbuf_append(ctxt->om, &rm_demo_write_data,
strlen(rm_demo_write_data));
break;
case BLE_GATT_ACCESS_OP_WRITE_CHR:
puts("write to characteristic");
printf("old value of rm_demo_write_data: '%s'\n",
rm_demo_write_data);
uint16_t om_len;
om_len = OS_MBUF_PKTLEN(ctxt->om);
/* read sent data */
rc = ble_hs_mbuf_to_flat(ctxt->om, &rm_demo_write_data,
sizeof rm_demo_write_data, &om_len);
/* we need to null-terminate the received string */
rm_demo_write_data[om_len] = '\0';
printf("new value of rm_demo_write_data: '%s'\n",
rm_demo_write_data);
break;
case BLE_GATT_ACCESS_OP_READ_DSC:
puts("read from descriptor");
break;
case BLE_GATT_ACCESS_OP_WRITE_DSC:
puts("write to descriptor");
break;
default:
puts("unhandled operation!");
rc = 1;
break;
}
puts("");
return rc;
}
else if (ble_uuid_cmp(ctxt->chr->uuid, readonly_uuid) == 0) {
puts("access to characteristic 'rw demo (read-only)'");
if (ctxt->op == BLE_GATT_ACCESS_OP_READ_CHR) {
char random_digit;
/* get random char between '0' and '9' */
random_digit = 48 + (rand() % 10);
snprintf(str_answer, STR_ANSWER_BUFFER_SIZE,
"new random number: %c", random_digit);
puts(str_answer);
rc = os_mbuf_append(ctxt->om, &str_answer, strlen(str_answer));
puts("");
return rc;
}
return 0;
}
puts("unhandled uuid!");
return 1;
}
