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Don't call application callbacks invoked when connection not established.

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If a connection event was sent but failed to establish then the disconnect
callback would be triggered when the application was not yet informed of the connection.

* Cleanup logs and add comments.
This commit is contained in:
h2zero 2021-01-12 13:52:28 -07:00
parent 28717c300a
commit 740f280664
2 changed files with 52 additions and 29 deletions
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66
src/NimBLEClient.cpp
View file

@ -62,6 +62,7 @@ NimBLEClient::NimBLEClient(const NimBLEAddress &peerAddress) : m_peerAddress(pee
m_connectTimeout = 30000;
m_deleteCallbacks = false;
m_pTaskData = nullptr;
m_connEstablished = false;
m_pConnParams.scan_itvl = 16; // Scan interval in 0.625ms units (NimBLE Default)
m_pConnParams.scan_window = 16; // Scan window in 0.625ms units (NimBLE Default)
@ -216,6 +217,7 @@ bool NimBLEClient::connect(const NimBLEAddress &address, bool deleteAttibutes) {
break;
case BLE_HS_EBUSY:
// Scan was still running, stop it and try again
if (!NimBLEDevice::getScan()->stop()) {
return false;
}
@ -223,11 +225,16 @@ bool NimBLEClient::connect(const NimBLEAddress &address, bool deleteAttibutes) {
break;
case BLE_HS_EDONE:
// A connection to this device already exists, do not connect twice.
NIMBLE_LOGE(LOG_TAG, "Already connected to device; addr=%s",
std::string(m_peerAddress).c_str());
return false;
case BLE_HS_EALREADY:
// Already attemting to connect to this device, cancel the previous
// attempt and report failure here so we don't get 2 connections.
NIMBLE_LOGE(LOG_TAG, "Already attempting to connect to %s - cancelling",
std::string(m_peerAddress).c_str());
ble_gap_conn_cancel();
return false;
@ -243,7 +250,18 @@ bool NimBLEClient::connect(const NimBLEAddress &address, bool deleteAttibutes) {
// Wait for the connection to complete.
ulTaskNotifyTake(pdTRUE, portMAX_DELAY);
if(taskData.rc != 0){
NIMBLE_LOGE(LOG_TAG, "Connection failed; status=%d %s",
taskData.rc,
NimBLEUtils::returnCodeToString(taskData.rc));
// If the failure was not a result of a disconnection
// make sure we disconnect now to avoid dangling connections
if(isConnected()) {
ble_gap_terminate(m_conn_id, BLE_ERR_REM_USER_CONN_TERM);
}
return false;
} else {
NIMBLE_LOGI(LOG_TAG, "Connection established");
m_connEstablished = true;
}
if(deleteAttibutes) {
@ -735,7 +753,8 @@ uint16_t NimBLEClient::getMTU() {
* @param [in] event The event structure sent by the NimBLE stack.
* @param [in] arg A pointer to the client instance that registered for this callback.
*/
/*STATIC*/ int NimBLEClient::handleGapEvent(struct ble_gap_event *event, void *arg) {
/*STATIC*/
int NimBLEClient::handleGapEvent(struct ble_gap_event *event, void *arg) {
NimBLEClient* client = (NimBLEClient*)arg;
int rc;
@ -744,15 +763,11 @@ uint16_t NimBLEClient::getMTU() {
switch(event->type) {
case BLE_GAP_EVENT_DISCONNECT: {
// If the connection id is invalid ignore this event
if(event->disconnect.conn.conn_handle == BLE_HS_CONN_HANDLE_NONE)
return 0;
// Check that the event is for this connection.
// Check that the event is for this client.
if(client->m_conn_id != event->disconnect.conn.conn_handle)
return 0;
rc = event->disconnect.reason;
client->m_conn_id = BLE_HS_CONN_HANDLE_NONE;
// Stop the disconnect timer since we are now disconnected.
ble_npl_callout_stop(&client->m_dcTimer);
@ -760,12 +775,18 @@ uint16_t NimBLEClient::getMTU() {
// Remove the device from ignore list so we will scan it again
NimBLEDevice::removeIgnored(client->m_peerAddress);
NIMBLE_LOGI(LOG_TAG, "disconnect; reason=%d, %s",
rc, NimBLEUtils::returnCodeToString(rc));
rc = event->disconnect.reason;
// If we got a connected event but did not get established (no PDU)
// then a disconnect event will be sent but we should not send it to the
// app for processing. Instead we will ensure the task is released
// and report the error.
if(!client->m_connEstablished)
break;
// If Host reset tell the device now before returning to prevent
// any errors caused by calling host functions before resyncing.
switch(event->disconnect.reason) {
switch(rc) {
case BLE_HS_ETIMEOUT_HCI:
case BLE_HS_EOS:
case BLE_HS_ECONTROLLER:
@ -774,18 +795,20 @@ uint16_t NimBLEClient::getMTU() {
NimBLEDevice::onReset(rc);
break;
default:
NIMBLE_LOGI(LOG_TAG, "disconnect; reason=%d, %s",
rc, NimBLEUtils::returnCodeToString(rc));
break;
}
client->m_conn_id = BLE_HS_CONN_HANDLE_NONE;
client->m_connEstablished = false;
client->m_pClientCallbacks->onDisconnect(client);
break;
} // BLE_GAP_EVENT_DISCONNECT
case BLE_GAP_EVENT_CONNECT: {
// If we aren't waiting for this connection response, this is a delayed packet
// We should drop the connection immediately.
// If we aren't waiting for this connection response
// we should drop the connection immediately.
if(client->isConnected() || client->m_pTaskData == nullptr) {
ble_gap_terminate(event->connect.conn_handle, BLE_ERR_REM_USER_CONN_TERM);
return 0;
@ -793,13 +816,13 @@ uint16_t NimBLEClient::getMTU() {
rc = event->connect.status;
if (rc == 0) {
NIMBLE_LOGD(LOG_TAG, "Connection established");
NIMBLE_LOGI(LOG_TAG, "Connected event");
client->m_conn_id = event->connect.conn_handle;
rc = ble_gattc_exchange_mtu(client->m_conn_id, NULL,NULL);
if(rc != 0) {
NIMBLE_LOGE(LOG_TAG, "ble_gattc_exchange_mtu: rc=%d %s",
NIMBLE_LOGE(LOG_TAG, "MTU exchange error; rc=%d %s",
rc, NimBLEUtils::returnCodeToString(rc));
break;
}
@ -808,9 +831,6 @@ uint16_t NimBLEClient::getMTU() {
// scanning since we are already connected to it
NimBLEDevice::addIgnored(client->m_peerAddress);
} else {
NIMBLE_LOGE(LOG_TAG, "Connection failed; status=%d %s",
rc, NimBLEUtils::returnCodeToString(rc));
client->m_conn_id = BLE_HS_CONN_HANDLE_NONE;
break;
}
@ -822,7 +842,8 @@ uint16_t NimBLEClient::getMTU() {
if(client->m_conn_id != event->notify_rx.conn_handle)
return 0;
NIMBLE_LOGD(LOG_TAG, "Notify Recieved for handle: %d",event->notify_rx.attr_handle);
NIMBLE_LOGD(LOG_TAG, "Notify Recieved for handle: %d",
event->notify_rx.attr_handle);
for(auto &it: client->m_servicesVector) {
// Dont waste cycles searching services without this handle in its range
@ -842,11 +863,13 @@ uint16_t NimBLEClient::getMTU() {
}
if(characteristic != cVector->cend()) {
NIMBLE_LOGD(LOG_TAG, "Got Notification for characteristic %s", (*characteristic)->toString().c_str());
NIMBLE_LOGD(LOG_TAG, "Got Notification for characteristic %s",
(*characteristic)->toString().c_str());
time_t t = time(nullptr);
portENTER_CRITICAL(&(*characteristic)->m_valMux);
(*characteristic)->m_value = std::string((char *)event->notify_rx.om->om_data, event->notify_rx.om->om_len);
(*characteristic)->m_value = std::string((char *)event->notify_rx.om->om_data,
event->notify_rx.om->om_len);
(*characteristic)->m_timestamp = t;
portEXIT_CRITICAL(&(*characteristic)->m_valMux);
@ -1004,7 +1027,6 @@ uint16_t NimBLEClient::getMTU() {
} // Switch
if(client->m_pTaskData != nullptr) {
//NIMBLE_LOGC(LOG_TAG, "TASK GIVE rc = %d %s", rc, NimBLEUtils::gapEventToString(event->type));
client->m_pTaskData->rc = rc;
xTaskNotifyGive(client->m_pTaskData->task);
client->m_pTaskData = nullptr;

1
src/NimBLEClient.h
View file

@ -89,6 +89,7 @@ private:
NimBLEAddress m_peerAddress;
uint16_t m_conn_id;
bool m_connEstablished;
bool m_deleteCallbacks;
int32_t m_connectTimeout;
NimBLEClientCallbacks* m_pClientCallbacks;