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Initial preparation for the "connect" operation.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| // | ||
| // Copyright 2024 - 2024 (C). Alex Robenko. All rights reserved. | ||
| // | ||
| // This Source Code Form is subject to the terms of the Mozilla Public | ||
| // License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| // file, You can obtain one at http://mozilla.org/MPL/2.0/. | ||
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| #include "op/ConnectOp.h" | ||
| #include "ClientImpl.h" | ||
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| #include "comms/util/assign.h" | ||
| #include "comms/util/ScopeGuard.h" | ||
| #include "comms/units.h" | ||
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| #include <algorithm> | ||
| #include <limits> | ||
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| namespace cc_mqttsn_client | ||
| { | ||
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| namespace op | ||
| { | ||
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| namespace | ||
| { | ||
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| inline ConnectOp* asConnectOp(void* data) | ||
| { | ||
| return reinterpret_cast<ConnectOp*>(data); | ||
| } | ||
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| } // namespace | ||
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| ConnectOp::ConnectOp(ClientImpl& client) : | ||
| Base(client), | ||
| m_timer(client.timerMgr().allocTimer()) | ||
| { | ||
| } | ||
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| CC_MqttsnErrorCode ConnectOp::send(CC_MqttsnConnectCompleteCb cb, void* cbData) | ||
| { | ||
| client().allowNextPrepare(); | ||
| auto completeOnError = | ||
| comms::util::makeScopeGuard( | ||
| [this]() | ||
| { | ||
| opComplete(); | ||
| }); | ||
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| if (cb == nullptr) { | ||
| errorLog("Connect completion callback is not provided."); | ||
| return CC_MqttsnErrorCode_BadParam; | ||
| } | ||
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| if (!m_timer.isValid()) { | ||
| errorLog("The library cannot allocate required number of timers."); | ||
| return CC_MqttsnErrorCode_InternalError; | ||
| } | ||
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| m_cb = cb; | ||
| m_cbData = cbData; | ||
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| auto ec = sendInternal(); | ||
| if (ec == CC_MqttsnErrorCode_Success) { | ||
| completeOnError.release(); | ||
| } | ||
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| return ec; | ||
| } | ||
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| CC_MqttsnErrorCode ConnectOp::cancel() | ||
| { | ||
| if (m_cb == nullptr) { | ||
| // hasn't been sent yet | ||
| client().allowNextPrepare(); | ||
| } | ||
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| opComplete(); | ||
| return CC_MqttsnErrorCode_Success; | ||
| } | ||
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| Op::Type ConnectOp::typeImpl() const | ||
| { | ||
| return Type_Connect; | ||
| } | ||
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| void ConnectOp::terminateOpImpl(CC_MqttsnAsyncOpStatus status) | ||
| { | ||
| completeOpInternal(status); | ||
| } | ||
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| void ConnectOp::completeOpInternal(CC_MqttsnAsyncOpStatus status, const CC_MqttsnConnectInfo* info) | ||
| { | ||
| auto cb = m_cb; | ||
| auto* cbData = m_cbData; | ||
| opComplete(); // mustn't access data members after destruction | ||
| if (cb != nullptr) { | ||
| cb(cbData, status, info); | ||
| } | ||
| } | ||
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| void ConnectOp::restartTimer() | ||
| { | ||
| m_timer.wait(getRetryPeriod(), &ConnectOp::opTimeoutCb, this); | ||
| } | ||
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| CC_MqttsnErrorCode ConnectOp::sendInternal() | ||
| { | ||
| if (getRetryCount() == 0U) { | ||
| errorLog("All retries of the connect operation have been exhausted."); | ||
| completeOpInternal(CC_MqttsnAsyncOpStatus_Timeout); | ||
| return CC_MqttsnErrorCode_InternalError; | ||
| } | ||
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| decRetryCount(); | ||
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| return sendMessage(m_connectMsg); | ||
| } | ||
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| void ConnectOp::opTimeoutCb(void* data) | ||
| { | ||
| asConnectOp(data)->sendInternal(); | ||
| } | ||
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| } // namespace op | ||
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| } // namespace cc_mqttsn_client |
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