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refactor: Consolidate attribute get code into NimBLEUtils

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This commit is contained in:
thekurtovic 2025-01-16 15:55:10 -05:00
parent 8158a16fbf
commit a04ee15815
4 changed files with 182 additions and 282 deletions
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190
src/NimBLEClient.cpp
View file

@ -101,8 +101,8 @@ NimBLEClient::~NimBLEClient() {
*/
void NimBLEClient::deleteServices() {
// Delete all the services.
for (auto& it : m_svcVec) {
delete it;
for (auto& svc : m_svcVec) {
delete svc;
}
std::vector<NimBLERemoteService*>().swap(m_svcVec);
@ -243,8 +243,7 @@ bool NimBLEClient::connect(const NimBLEAddress& address, bool deleteAttributes,
break;
default:
NIMBLE_LOGE(LOG_TAG,
"Failed to connect to %s, rc=%d; %s",
NIMBLE_LOGE(LOG_TAG, "Failed to connect to %s, rc=%d; %s",
std::string(m_peerAddress).c_str(),
rc,
NimBLEUtils::returnCodeToString(rc));
@ -631,48 +630,14 @@ NimBLERemoteService* NimBLEClient::getService(const char* uuid) {
*/
NimBLERemoteService* NimBLEClient::getService(const NimBLEUUID& uuid) {
NIMBLE_LOGD(LOG_TAG, ">> getService: uuid: %s", uuid.toString().c_str());
NimBLERemoteService *pSvc = nullptr;
for (auto& it : m_svcVec) {
if (it->getUUID() == uuid) {
NIMBLE_LOGD(LOG_TAG, "<< getService: found the service with uuid: %s", uuid.toString().c_str());
return it;
}
}
NimBLEUtils::getAttr(uuid, pSvc, m_svcVec, [this](const NimBLEUUID* u, void* arg) {
return retrieveServices(u, (NimBLERemoteService*)arg);
});
size_t prevSize = m_svcVec.size();
if (retrieveServices(&uuid)) {
if (m_svcVec.size() > prevSize) {
return m_svcVec.back();
}
// If the request was successful but 16/32 bit uuid not found
// try again with the 128 bit uuid.
if (uuid.bitSize() == BLE_UUID_TYPE_16 || uuid.bitSize() == BLE_UUID_TYPE_32) {
NimBLEUUID uuid128(uuid);
uuid128.to128();
if (retrieveServices(&uuid128)) {
if (m_svcVec.size() > prevSize) {
return m_svcVec.back();
}
}
} else {
// If the request was successful but the 128 bit uuid not found
// try again with the 16 bit uuid.
NimBLEUUID uuid16(uuid);
uuid16.to16();
// if the uuid was 128 bit but not of the BLE base type this check will fail
if (uuid16.bitSize() == BLE_UUID_TYPE_16) {
if (retrieveServices(&uuid16)) {
if (m_svcVec.size() > prevSize) {
return m_svcVec.back();
}
}
}
}
}
NIMBLE_LOGD(LOG_TAG, "<< getService: not found");
return nullptr;
NIMBLE_LOGD(LOG_TAG, "<< getService: %sfound", !pSvc ? "not " : "");
return pSvc;
} // getService
/**
@ -725,7 +690,7 @@ bool NimBLEClient::discoverAttributes() {
* * Here we ask the server for its set of services and wait until we have received them all.
* @return true on success otherwise false if an error occurred
*/
bool NimBLEClient::retrieveServices(const NimBLEUUID* uuidFilter) {
bool NimBLEClient::retrieveServices(const NimBLEUUID* uuidFilter, NimBLERemoteService *out) {
if (!isConnected()) {
NIMBLE_LOGE(LOG_TAG, "Disconnected, could not retrieve services -aborting");
return false;
@ -735,9 +700,9 @@ bool NimBLEClient::retrieveServices(const NimBLEUUID* uuidFilter) {
NimBLETaskData taskData(this);
if (uuidFilter == nullptr) {
rc = ble_gattc_disc_all_svcs(m_connHandle, NimBLEClient::serviceDiscoveredCB, &taskData);
rc = ble_gattc_disc_all_svcs(m_connHandle, NimBLEClient::serviceDiscCB, &taskData);
} else {
rc = ble_gattc_disc_svc_by_uuid(m_connHandle, uuidFilter->getBase(), NimBLEClient::serviceDiscoveredCB, &taskData);
rc = ble_gattc_disc_svc_by_uuid(m_connHandle, uuidFilter->getBase(), NimBLEClient::serviceDiscCB, &taskData);
}
if (rc != 0) {
@ -748,13 +713,15 @@ bool NimBLEClient::retrieveServices(const NimBLEUUID* uuidFilter) {
NimBLEUtils::taskWait(taskData, BLE_NPL_TIME_FOREVER);
rc = taskData.m_flags;
if (rc == 0 || rc == BLE_HS_EDONE) {
return true;
if (rc != BLE_HS_EDONE) {
m_lastErr = rc;
NIMBLE_LOGE(LOG_TAG, "Could not retrieve services, rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
return false;
}
m_lastErr = rc;
NIMBLE_LOGE(LOG_TAG, "Could not retrieve services, rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
return false;
out = m_svcVec.back();
NIMBLE_LOGD(LOG_TAG, "<< retrieveServices(): found %d services.", m_svcVec.size());
return true;
} // getServices
/**
@ -762,39 +729,29 @@ bool NimBLEClient::retrieveServices(const NimBLEUUID* uuidFilter) {
* @details When a service is found or there is none left or there was an error
* the API will call this and report findings.
*/
int NimBLEClient::serviceDiscoveredCB(uint16_t connHandle,
const struct ble_gatt_error* error,
const struct ble_gatt_svc* service,
void* arg) {
NIMBLE_LOGD(LOG_TAG,
"Service Discovered >> status: %d handle: %d",
error->status,
(error->status == 0) ? service->start_handle : -1);
NimBLETaskData* pTaskData = (NimBLETaskData*)arg;
NimBLEClient* pClient = (NimBLEClient*)pTaskData->m_pInstance;
if (error->status == BLE_HS_ENOTCONN) {
NIMBLE_LOGE(LOG_TAG, "<< Service Discovered; Disconnected");
NimBLEUtils::taskRelease(*pTaskData, error->status);
return error->status;
}
int NimBLEClient::serviceDiscCB(uint16_t connHandle,
const struct ble_gatt_error* error,
const struct ble_gatt_svc* service,
void* arg) {
const int rc = error->status;
auto pTaskData = (NimBLETaskData*)arg;
auto pClient = (NimBLEClient*)pTaskData->m_pInstance;
NIMBLE_LOGD(LOG_TAG, "Service Discovered >> status: %d handle: %d", rc, (rc == 0) ? service->start_handle : -1);
// Make sure the service discovery is for this device
if (pClient->getConnHandle() != connHandle) {
return 0;
}
if (error->status == 0) {
// Found a service - add it to the vector
if (rc == 0) { // Found a service - add it to the vector
pClient->m_svcVec.push_back(new NimBLERemoteService(pClient, service));
return 0;
}
NimBLEUtils::taskRelease(*pTaskData, error->status);
NIMBLE_LOGD(LOG_TAG, "<< Service Discovered");
NIMBLE_LOGD(LOG_TAG, "<< Service Discovered%s", (rc == BLE_HS_ENOTCONN) ? "; Disconnected" : "");
return error->status;
} // serviceDiscoveredCB
} // serviceDiscCB
/**
* @brief Get the value of a specific characteristic associated with a specific service.
@ -803,8 +760,7 @@ int NimBLEClient::serviceDiscoveredCB(uint16_t connHandle,
* @returns characteristic value or an empty value if not found.
*/
NimBLEAttValue NimBLEClient::getValue(const NimBLEUUID& serviceUUID, const NimBLEUUID& characteristicUUID) {
NIMBLE_LOGD(LOG_TAG,
">> getValue: serviceUUID: %s, characteristicUUID: %s",
NIMBLE_LOGD(LOG_TAG, ">> getValue: serviceUUID: %s, characteristicUUID: %s",
serviceUUID.toString().c_str(),
characteristicUUID.toString().c_str());
@ -833,15 +789,14 @@ bool NimBLEClient::setValue(const NimBLEUUID& serviceUUID,
const NimBLEUUID& characteristicUUID,
const NimBLEAttValue& value,
bool response) {
NIMBLE_LOGD(LOG_TAG,
">> setValue: serviceUUID: %s, characteristicUUID: %s",
NIMBLE_LOGD(LOG_TAG, ">> setValue: serviceUUID: %s, characteristicUUID: %s",
serviceUUID.toString().c_str(),
characteristicUUID.toString().c_str());
bool ret = false;
auto pService = getService(serviceUUID);
if (pService != nullptr) {
NimBLERemoteCharacteristic* pChar = pService->getCharacteristic(characteristicUUID);
auto pChar = pService->getCharacteristic(characteristicUUID);
if (pChar != nullptr) {
ret = pChar->writeValue(value, response);
}
@ -858,11 +813,13 @@ bool NimBLEClient::setValue(const NimBLEUUID& serviceUUID,
*/
NimBLERemoteCharacteristic* NimBLEClient::getCharacteristic(uint16_t handle) {
for (const auto& svc : m_svcVec) {
if (svc->getStartHandle() <= handle && handle <= svc->getEndHandle()) {
for (const auto& chr : svc->m_vChars) {
if (chr->getHandle() == handle) {
return chr;
}
if (svc->getStartHandle() > handle && handle > svc->getEndHandle()) {
continue;
}
for (const auto& chr : svc->m_vChars) {
if (chr->getHandle() == handle) {
return chr;
}
}
}
@ -882,28 +839,28 @@ uint16_t NimBLEClient::getMTU() const {
* @brief Callback for the MTU exchange API function.
* @details When the MTU exchange is complete the API will call this and report the new MTU.
*/
int NimBLEClient::exchangeMTUCb(uint16_t conn_handle, const ble_gatt_error* error, uint16_t mtu, void* arg) {
NIMBLE_LOGD(LOG_TAG, "exchangeMTUCb: status=%d, mtu=%d", error->status, mtu);
int NimBLEClient::exchangeMTUCB(uint16_t connHandle, const ble_gatt_error* error, uint16_t mtu, void* arg) {
NIMBLE_LOGD(LOG_TAG, "exchangeMTUCB: status=%d, mtu=%d", error->status, mtu);
NimBLEClient* pClient = (NimBLEClient*)arg;
if (pClient->getConnHandle() != conn_handle) {
if (pClient->getConnHandle() != connHandle) {
return 0;
}
if (error->status != 0) {
NIMBLE_LOGE(LOG_TAG, "exchangeMTUCb() rc=%d %s", error->status, NimBLEUtils::returnCodeToString(error->status));
NIMBLE_LOGE(LOG_TAG, "exchangeMTUCB() rc=%d %s", error->status, NimBLEUtils::returnCodeToString(error->status));
pClient->m_lastErr = error->status;
}
return 0;
} // exchangeMTUCb
} // exchangeMTUCB
/**
* @brief Begin the MTU exchange process with the server.
* @returns true if the request was sent successfully.
*/
bool NimBLEClient::exchangeMTU() {
int rc = ble_gattc_exchange_mtu(m_connHandle, NimBLEClient::exchangeMTUCb, this);
int rc = ble_gattc_exchange_mtu(m_connHandle, NimBLEClient::exchangeMTUCB, this);
if (rc != 0) {
NIMBLE_LOGE(LOG_TAG, "MTU exchange error; rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
m_lastErr = rc;
@ -989,25 +946,25 @@ int NimBLEClient::handleGapEvent(struct ble_gap_event* event, void* arg) {
pClient->m_pClientCallbacks->onConnect(pClient);
}
if (pClient->m_config.exchangeMTU) {
if (!pClient->exchangeMTU()) {
rc = pClient->m_lastErr; // sets the error in the task data
break;
}
return 0; // return as we may have a task waiting for the MTU before releasing it.
if (!pClient->m_config.exchangeMTU) {
break;
}
} else {
pClient->m_connHandle = BLE_HS_CONN_HANDLE_NONE;
if (pClient->m_config.asyncConnect) {
pClient->m_pClientCallbacks->onConnectFail(pClient, rc);
if (pClient->m_config.deleteOnConnectFail) {
NimBLEDevice::deleteClient(pClient);
}
if (!pClient->exchangeMTU()) {
rc = pClient->m_lastErr; // sets the error in the task data
break;
}
return 0; // return as we may have a task waiting for the MTU before releasing it.
}
pClient->m_connHandle = BLE_HS_CONN_HANDLE_NONE;
if (pClient->m_config.asyncConnect) {
pClient->m_pClientCallbacks->onConnectFail(pClient, rc);
if (pClient->m_config.deleteOnConnectFail) {
NimBLEDevice::deleteClient(pClient);
}
}
break;
} // BLE_GAP_EVENT_CONNECT
@ -1035,23 +992,23 @@ int NimBLEClient::handleGapEvent(struct ble_gap_event* event, void* arg) {
continue;
}
NIMBLE_LOGD(LOG_TAG,
"checking service %s for handle: %d",
NIMBLE_LOGD(LOG_TAG, "checking service %s for handle: %d",
svc->getUUID().toString().c_str(),
event->notify_rx.attr_handle);
for (const auto& chr : svc->m_vChars) {
if (chr->getHandle() == event->notify_rx.attr_handle) {
NIMBLE_LOGD(LOG_TAG, "Got Notification for characteristic %s", chr->toString().c_str());
uint32_t data_len = OS_MBUF_PKTLEN(event->notify_rx.om);
chr->m_value.setValue(event->notify_rx.om->om_data, data_len);
if (chr->m_notifyCallback != nullptr) {
chr->m_notifyCallback(chr, event->notify_rx.om->om_data, data_len, !event->notify_rx.indication);
}
break;
if (chr->getHandle() != event->notify_rx.attr_handle) {
continue;
}
NIMBLE_LOGD(LOG_TAG, "Got Notification for characteristic %s", chr->toString().c_str());
uint32_t data_len = OS_MBUF_PKTLEN(event->notify_rx.om);
chr->m_value.setValue(event->notify_rx.om->om_data, data_len);
if (chr->m_notifyCallback != nullptr) {
chr->m_notifyCallback(chr, event->notify_rx.om->om_data, data_len, !event->notify_rx.indication);
}
break;
}
}
@ -1064,8 +1021,7 @@ int NimBLEClient::handleGapEvent(struct ble_gap_event* event, void* arg) {
return 0;
}
NIMBLE_LOGD(LOG_TAG, "Peer requesting to update connection parameters");
NIMBLE_LOGD(LOG_TAG,
"MinInterval: %d, MaxInterval: %d, Latency: %d, Timeout: %d",
NIMBLE_LOGD(LOG_TAG, "MinInterval: %d, MaxInterval: %d, Latency: %d, Timeout: %d",
event->conn_update_req.peer_params->itvl_min,
event->conn_update_req.peer_params->itvl_max,
event->conn_update_req.peer_params->latency,

137
src/NimBLERemoteCharacteristic.cpp
View file

@ -27,17 +27,17 @@
# include <climits>
typedef struct {
const NimBLEUUID* uuid;
void* task_data;
} desc_filter_t;
struct desc_filter_t {
const NimBLEUUID* uuid;
void* taskData;
};
static const char* LOG_TAG = "NimBLERemoteCharacteristic";
/**
* @brief Constructor.
* @param [in] svc A pointer to the service this characteristic belongs to.
* @param [in] ble_gatt_chr struct defined as:
* @param [in] chr struct defined as:
* struct ble_gatt_chr {
* uint16_t def_handle;
* uint16_t val_handle;
@ -62,57 +62,56 @@ NimBLERemoteCharacteristic::~NimBLERemoteCharacteristic() {
/**
* @brief Callback used by the API when a descriptor is discovered or search complete.
*/
int NimBLERemoteCharacteristic::descriptorDiscCB(
uint16_t conn_handle, const ble_gatt_error* error, uint16_t chr_val_handle, const ble_gatt_dsc* dsc, void* arg) {
int rc = error->status;
int NimBLERemoteCharacteristic::descriptorDiscCB(uint16_t connHandle,
const ble_gatt_error* error,
uint16_t chrHandle,
const ble_gatt_dsc* dsc,
void* arg) {
int rc = error->status;
auto filter = (desc_filter_t*)arg;
auto pTaskData = (NimBLETaskData*)filter->taskData;
const auto pChr = (NimBLERemoteCharacteristic*)pTaskData->m_pInstance;
const auto uuid = filter->uuid; // UUID to filter for
NIMBLE_LOGD(LOG_TAG, "Descriptor Discovery >> status: %d handle: %d", rc, (rc == 0) ? dsc->handle : -1);
auto filter = (desc_filter_t*)arg;
auto pTaskData = (NimBLETaskData*)filter->task_data;
const auto pChr = (NimBLERemoteCharacteristic*)pTaskData->m_pInstance;
const NimBLEUUID* uuidFilter = filter->uuid;
if (pChr->getHandle() != chr_val_handle) {
return 0; // Descriptor not for this characteristic
}
if (rc == 0) {
if (uuidFilter != nullptr) {
if (ble_uuid_cmp(uuidFilter->getBase(), &dsc->uuid.u) == 0) {
rc = BLE_HS_EDONE; // Found the descriptor, stop the search
} else {
return 0; // Not the descriptor we are looking for
}
}
// Results for chrHandle added until rc != 0
// Must find specified UUID if filter is used
if (rc == 0 && pChr->getHandle() == chrHandle
&& (!uuid || 0 == ble_uuid_cmp(uuid->getBase(), &dsc->uuid.u))) {
// Return BLE_HS_EDONE if the descriptor was found, stop the search
pChr->m_vDescriptors.push_back(new NimBLERemoteDescriptor(pChr, dsc));
return 0;
rc = !!uuid * BLE_HS_EDONE;
}
NimBLEUtils::taskRelease(*pTaskData, rc);
NIMBLE_LOGD(LOG_TAG, "<< Descriptor Discovery");
if (rc != 0) {
NimBLEUtils::taskRelease(*pTaskData, rc);
NIMBLE_LOGD(LOG_TAG, "<< Descriptor Discovery");
}
return rc;
}
/**
* @brief Populate the descriptors (if any) for this characteristic.
* @param [in] the end handle of the characteristic, or the service, whichever comes first.
* @param [in] filter Structure containing pointers to descriptor, UUID, and task data.
* @return True if successfully retrieved, success = BLE_HS_EDONE.
*/
bool NimBLERemoteCharacteristic::retrieveDescriptors(const NimBLEUUID* uuidFilter) const {
bool NimBLERemoteCharacteristic::retrieveDescriptors(const NimBLEUUID* uuidFilter, NimBLERemoteDescriptor* out) const {
NIMBLE_LOGD(LOG_TAG, ">> retrieveDescriptors() for characteristic: %s", getUUID().toString().c_str());
NimBLETaskData taskData(const_cast<NimBLERemoteCharacteristic*>(this));
desc_filter_t filter = {uuidFilter, &taskData};
const uint16_t handle = getHandle();
const uint16_t svcHandle = getRemoteService()->getEndHandle();
// If this is the last handle then there are no descriptors
if (getHandle() == getRemoteService()->getEndHandle()) {
NIMBLE_LOGD(LOG_TAG, "<< retrieveDescriptors(): found 0 descriptors.");
return true;
if (handle == svcHandle) {
NIMBLE_LOGD(LOG_TAG, "<< retrieveDescriptors(): found 0 descriptors.");
return true;
}
NimBLETaskData taskData(const_cast<NimBLERemoteCharacteristic*>(this));
desc_filter_t filter = {uuidFilter, &taskData};
int rc = ble_gattc_disc_all_dscs(getClient()->getConnHandle(),
getHandle(),
getRemoteService()->getEndHandle(),
handle,
svcHandle,
NimBLERemoteCharacteristic::descriptorDiscCB,
&filter);
if (rc != 0) {
@ -122,13 +121,14 @@ bool NimBLERemoteCharacteristic::retrieveDescriptors(const NimBLEUUID* uuidFilte
NimBLEUtils::taskWait(taskData, BLE_NPL_TIME_FOREVER);
rc = taskData.m_flags;
if (rc == 0 || rc == BLE_HS_EDONE) {
NIMBLE_LOGD(LOG_TAG, "<< retrieveDescriptors(): found %d descriptors.", m_vDescriptors.size());
return true;
if (rc != BLE_HS_EDONE) {
NIMBLE_LOGE(LOG_TAG, "<< retrieveDescriptors(): failed: rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
return false;
}
NIMBLE_LOGE(LOG_TAG, "<< retrieveDescriptors(): failed: rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
return false;
out = m_vDescriptors.back();
NIMBLE_LOGD(LOG_TAG, "<< retrieveDescriptors(): found %d descriptors.", m_vDescriptors.size());
return true;
} // retrieveDescriptors
/**
@ -138,50 +138,13 @@ bool NimBLERemoteCharacteristic::retrieveDescriptors(const NimBLEUUID* uuidFilte
*/
NimBLERemoteDescriptor* NimBLERemoteCharacteristic::getDescriptor(const NimBLEUUID& uuid) const {
NIMBLE_LOGD(LOG_TAG, ">> getDescriptor: uuid: %s", uuid.toString().c_str());
NimBLERemoteDescriptor* pDsc = nullptr;
size_t prev_size = m_vDescriptors.size();
NimBLERemoteDescriptor* pDsc = nullptr;
for (const auto& it : m_vDescriptors) {
if (it->getUUID() == uuid) {
pDsc = it;
goto Done;
}
}
NimBLEUtils::getAttr(uuid, pDsc, m_vDescriptors, [this](const NimBLEUUID* u, void* arg) {
return retrieveDescriptors(u, (NimBLERemoteDescriptor*)arg);
});
if (retrieveDescriptors(&uuid)) {
if (m_vDescriptors.size() > prev_size) {
pDsc = m_vDescriptors.back();
goto Done;
}
// If the request was successful but 16/32 bit uuid not found
// try again with the 128 bit uuid.
if (uuid.bitSize() == BLE_UUID_TYPE_16 || uuid.bitSize() == BLE_UUID_TYPE_32) {
NimBLEUUID uuid128(uuid);
uuid128.to128();
if (retrieveDescriptors(&uuid128)) {
if (m_vDescriptors.size() > prev_size) {
pDsc = m_vDescriptors.back();
}
}
} else {
// If the request was successful but the 128 bit uuid not found
// try again with the 16 bit uuid.
NimBLEUUID uuid16(uuid);
uuid16.to16();
// if the uuid was 128 bit but not of the BLE base type this check will fail
if (uuid16.bitSize() == BLE_UUID_TYPE_16) {
if (retrieveDescriptors(&uuid16)) {
if (m_vDescriptors.size() > prev_size) {
pDsc = m_vDescriptors.back();
}
}
}
}
}
Done:
NIMBLE_LOGD(LOG_TAG, "<< getDescriptor: %sfound", pDsc ? "" : "not ");
NIMBLE_LOGD(LOG_TAG, "<< getDescriptor: %sfound", !pDsc ? "not " : "");
return pDsc;
} // getDescriptor
@ -311,7 +274,7 @@ size_t NimBLERemoteCharacteristic::deleteDescriptor(const NimBLEUUID& uuid) cons
* @return True if supported.
*/
bool NimBLERemoteCharacteristic::canBroadcast() const {
return (m_properties & BLE_GATT_CHR_PROP_BROADCAST) != 0;
return (m_properties & BLE_GATT_CHR_PROP_BROADCAST);
};
/**

106
src/NimBLERemoteService.cpp
View file

@ -76,50 +76,13 @@ NimBLERemoteCharacteristic* NimBLERemoteService::getCharacteristic(const char* u
*/
NimBLERemoteCharacteristic* NimBLERemoteService::getCharacteristic(const NimBLEUUID& uuid) const {
NIMBLE_LOGD(LOG_TAG, ">> getCharacteristic: uuid: %s", uuid.toString().c_str());
NimBLERemoteCharacteristic* pChar = nullptr;
size_t prev_size = m_vChars.size();
NimBLERemoteCharacteristic* pChar = nullptr;
for (const auto& it : m_vChars) {
if (it->getUUID() == uuid) {
pChar = it;
goto Done;
}
}
NimBLEUtils::getAttr(uuid, pChar, m_vChars, [this](const NimBLEUUID* u, void* arg) {
return retrieveCharacteristics(u, (NimBLERemoteCharacteristic*)arg);
});
if (retrieveCharacteristics(&uuid)) {
if (m_vChars.size() > prev_size) {
pChar = m_vChars.back();
goto Done;
}
// If the request was successful but 16/32 bit uuid not found
// try again with the 128 bit uuid.
if (uuid.bitSize() == BLE_UUID_TYPE_16 || uuid.bitSize() == BLE_UUID_TYPE_32) {
NimBLEUUID uuid128(uuid);
uuid128.to128();
if (retrieveCharacteristics(&uuid128)) {
if (m_vChars.size() > prev_size) {
pChar = m_vChars.back();
}
}
} else {
// If the request was successful but the 128 bit uuid not found
// try again with the 16 bit uuid.
NimBLEUUID uuid16(uuid);
uuid16.to16();
// if the uuid was 128 bit but not of the BLE base type this check will fail
if (uuid16.bitSize() == BLE_UUID_TYPE_16) {
if (retrieveCharacteristics(&uuid16)) {
if (m_vChars.size() > prev_size) {
pChar = m_vChars.back();
}
}
}
}
}
Done:
NIMBLE_LOGD(LOG_TAG, "<< Characteristic %sfound", pChar ? "" : "not ");
NIMBLE_LOGD(LOG_TAG, "<< getCharacteristic: %sfound", !pChar ? "not " : "");
return pChar;
} // getCharacteristic
@ -143,47 +106,39 @@ const std::vector<NimBLERemoteCharacteristic*>& NimBLERemoteService::getCharacte
* @brief Callback for Characteristic discovery.
* @return success == 0 or error code.
*/
int NimBLERemoteService::characteristicDiscCB(uint16_t conn_handle,
int NimBLERemoteService::characteristicDiscCB(uint16_t connHandle,
const ble_gatt_error* error,
const ble_gatt_chr* chr,
void* arg) {
NIMBLE_LOGD(LOG_TAG,
"Characteristic Discovery >> status: %d handle: %d",
error->status,
(error->status == 0) ? chr->def_handle : -1);
const int rc = error->status;
auto pTaskData = (NimBLETaskData*)arg;
const auto pSvc = (NimBLERemoteService*)pTaskData->m_pInstance;
if (error->status == BLE_HS_ENOTCONN) {
NIMBLE_LOGE(LOG_TAG, "<< Characteristic Discovery; Not connected");
NimBLEUtils::taskRelease(*pTaskData, error->status);
return error->status;
}
NIMBLE_LOGD(LOG_TAG, "Characteristic Discovery >> status: %d handle: %d", rc, (rc == 0) ? chr->def_handle : -1);
// Make sure the discovery is for this device
if (pSvc->getClient()->getConnHandle() != conn_handle) {
if (pSvc->getClient()->getConnHandle() != connHandle) {
return 0;
}
if (error->status == 0) {
if (rc == 0) {
pSvc->m_vChars.push_back(new NimBLERemoteCharacteristic(pSvc, chr));
return 0;
}
NimBLEUtils::taskRelease(*pTaskData, error->status);
NIMBLE_LOGD(LOG_TAG, "<< Characteristic Discovery");
return error->status;
NimBLEUtils::taskRelease(*pTaskData, rc);
NIMBLE_LOGD(LOG_TAG, "<< Characteristic Discovery%s", (rc == BLE_HS_ENOTCONN) ? "; Not connected" : "");
return rc;
}
/**
* @brief Retrieve all the characteristics for this service.
* This function will not return until we have all the characteristics.
* @return True if successful.
* @return True if successfully retrieved, success = BLE_HS_EDONE.
*/
bool NimBLERemoteService::retrieveCharacteristics(const NimBLEUUID* uuidFilter) const {
bool NimBLERemoteService::retrieveCharacteristics(const NimBLEUUID* uuidFilter, NimBLERemoteCharacteristic* out) const {
NIMBLE_LOGD(LOG_TAG, ">> retrieveCharacteristics()");
int rc = 0;
NimBLETaskData taskData(const_cast<NimBLERemoteService*>(this));
int rc = 0;
if (uuidFilter == nullptr) {
rc = ble_gattc_disc_all_chrs(m_pClient->getConnHandle(),
@ -207,13 +162,14 @@ bool NimBLERemoteService::retrieveCharacteristics(const NimBLEUUID* uuidFilter)
NimBLEUtils::taskWait(taskData, BLE_NPL_TIME_FOREVER);
rc = taskData.m_flags;
if (rc == 0 || rc == BLE_HS_EDONE) {
NIMBLE_LOGD(LOG_TAG, "<< retrieveCharacteristics()");
return true;
if (rc != BLE_HS_EDONE) {
NIMBLE_LOGE(LOG_TAG, "<< retrieveCharacteristics(): failed: rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
return false;
}
NIMBLE_LOGE(LOG_TAG, "<< retrieveCharacteristics() rc=%d %s", rc, NimBLEUtils::returnCodeToString(rc));
return false;
out = m_vChars.back();
NIMBLE_LOGD(LOG_TAG, "<< retrieveCharacteristics(): found %d characteristics.", m_vChars.size());
return true;
} // retrieveCharacteristics
/**
@ -231,11 +187,8 @@ NimBLEClient* NimBLERemoteService::getClient() const {
*/
NimBLEAttValue NimBLERemoteService::getValue(const NimBLEUUID& uuid) const {
const auto pChar = getCharacteristic(uuid);
if (pChar) {
return pChar->readValue();
}
return NimBLEAttValue{};
return pChar ? pChar->readValue()
: NimBLEAttValue{};
} // readValue
/**
@ -246,11 +199,8 @@ NimBLEAttValue NimBLERemoteService::getValue(const NimBLEUUID& uuid) const {
*/
bool NimBLERemoteService::setValue(const NimBLEUUID& uuid, const NimBLEAttValue& value) const {
const auto pChar = getCharacteristic(uuid);
if (pChar) {
return pChar->writeValue(value);
}
return false;
return pChar ? pChar->writeValue(value)
: false;
} // setValue
/**
@ -260,8 +210,8 @@ bool NimBLERemoteService::setValue(const NimBLEUUID& uuid, const NimBLEAttValue&
* them. This method does just that.
*/
void NimBLERemoteService::deleteCharacteristics() const {
for (const auto& it : m_vChars) {
delete it;
for (const auto& chr : m_vChars) {
delete chr;
}
std::vector<NimBLERemoteCharacteristic*>{}.swap(m_vChars);
} // deleteCharacteristics

31
src/NimBLEUtils.h
View file

@ -20,6 +20,8 @@
#include "nimconfig.h"
#if defined(CONFIG_BT_ENABLED)
# include "NimBLEUUID.h"
# include "functional"
# include <string>
class NimBLEAddress;
@ -53,6 +55,35 @@ class NimBLEUtils {
static NimBLEAddress generateAddr(bool nrpa);
static bool taskWait(const NimBLETaskData& taskData, uint32_t timeout);
static void taskRelease(const NimBLETaskData& taskData, int rc = 0);
template <typename T, typename S>
static void getAttr(const NimBLEUUID& uuid, T* attr, const std::vector<S*> vec, const std::function<bool(const NimBLEUUID*, void*)>& getter) {
// Check if already exists.
for (const auto& v : vec) {
if (v->getUUID() == uuid) {
attr = v;
return;
}
}
// Exit if request failed or uuid was found.
if (!getter(&uuid, attr) || attr) {
return;
}
// Try again with 128 bit uuid if request succeeded with no uuid found.
if (uuid.bitSize() == BLE_UUID_TYPE_16 || uuid.bitSize() == BLE_UUID_TYPE_32) {
NimBLEUUID uuid128 = NimBLEUUID(uuid).to128();
getter(&uuid128, attr);
return;
}
// Try again with 16 bit uuid if request succeeded with no uuid found.
// If the uuid was 128 bit but not of the BLE base type this check will fail.
NimBLEUUID uuid16 = NimBLEUUID(uuid).to16();
if (uuid16.bitSize() == BLE_UUID_TYPE_16) {
getter(&uuid16, attr);
}
}
};
#endif // CONFIG_BT_ENABLED