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Add support for CASE session caching for session resume use cases (pr…
…oject-chip#11937) - Add tests for the CASE session cache - Update the CASESessionCachable struct to have only necessary members and rename the struct and APIs appropriately - Remove the tests that serilaize and deserilaize the CASE Session as its outdated
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| /* | ||
| * | ||
| * Copyright (c) 2021 Project CHIP Authors | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
|
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| #include <protocols/secure_channel/CASESessionCache.h> | ||
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| namespace chip { | ||
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| CASESessionCache::CASESessionCache() {} | ||
|
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| CASESessionCache::~CASESessionCache() | ||
| { | ||
| mCachePool.ForEachActiveObject([&](auto * ec) { | ||
| mCachePool.ReleaseObject(ec); | ||
| return true; | ||
| }); | ||
| } | ||
|
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| CASESessionCachable * CASESessionCache::GetLRUSession() | ||
| { | ||
| uint64_t minTimeStamp = UINT64_MAX; | ||
| CASESessionCachable * lruSession = nullptr; | ||
| mCachePool.ForEachActiveObject([&](auto * ec) { | ||
| if (minTimeStamp > ec->mSessionSetupTimeStamp) | ||
| { | ||
| minTimeStamp = ec->mSessionSetupTimeStamp; | ||
| lruSession = ec; | ||
| } | ||
| return true; | ||
| }); | ||
| return lruSession; | ||
| } | ||
|
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| CHIP_ERROR CASESessionCache::Add(CASESessionCachable & cachableSession) | ||
| { | ||
| // It's not an error if a device doesn't have cache for storing the sessions. | ||
| VerifyOrReturnError(mCachePool.Capacity() > 0, CHIP_NO_ERROR); | ||
|
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| // If the cache is full, get the least recently used session index and release that. | ||
| if (mCachePool.Exhausted()) | ||
| { | ||
| mCachePool.ReleaseObject(GetLRUSession()); | ||
| } | ||
|
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| mCachePool.CreateObject(cachableSession); | ||
| return CHIP_NO_ERROR; | ||
| } | ||
|
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| CHIP_ERROR CASESessionCache::Remove(ResumptionID resumptionID) | ||
| { | ||
| CHIP_ERROR err = CHIP_NO_ERROR; | ||
| CASESession session; | ||
| mCachePool.ForEachActiveObject([&](auto * ec) { | ||
| if (resumptionID.data_equal(ResumptionID(ec->mResumptionId))) | ||
| { | ||
| mCachePool.ReleaseObject(ec); | ||
| } | ||
| return true; | ||
| }); | ||
|
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| return err; | ||
| } | ||
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| CHIP_ERROR CASESessionCache::Get(ResumptionID resumptionID, CASESessionCachable & outSessionCachable) | ||
| { | ||
| CHIP_ERROR err = CHIP_NO_ERROR; | ||
| bool found = false; | ||
| mCachePool.ForEachActiveObject([&](auto * ec) { | ||
| if (resumptionID.data_equal(ResumptionID(ec->mResumptionId))) | ||
| { | ||
| found = true; | ||
| outSessionCachable = *ec; | ||
| return false; | ||
| } | ||
| return true; | ||
| }); | ||
|
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| if (!found) | ||
| { | ||
| err = CHIP_ERROR_PERSISTED_STORAGE_VALUE_NOT_FOUND; | ||
| } | ||
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| return err; | ||
| } | ||
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| CHIP_ERROR CASESessionCache::Get(const PeerId & peer, CASESessionCachable & outSessionCachable) | ||
| { | ||
| // TODO: Implement this based on peer id | ||
| return CHIP_NO_ERROR; | ||
| } | ||
|
|
||
| } // namespace chip |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /* | ||
| * | ||
| * Copyright (c) 2021 Project CHIP Authors | ||
| * | ||
| * Licensed 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. | ||
| */ | ||
|
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| #pragma once | ||
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| #include <lib/core/CHIPError.h> | ||
| #include <lib/core/PeerId.h> | ||
| #include <protocols/secure_channel/CASESession.h> | ||
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| namespace chip { | ||
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| using ResumptionID = FixedByteSpan<kCASEResumptionIDSize>; | ||
|
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| class CASESessionCache | ||
| { | ||
| public: | ||
| CASESessionCache(); | ||
| virtual ~CASESessionCache(); | ||
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| CHIP_ERROR Add(CASESessionCachable & cachableSession); | ||
| CHIP_ERROR Remove(ResumptionID resumptionID); | ||
| CHIP_ERROR Get(ResumptionID resumptionID, CASESessionCachable & outCachableSession); | ||
| CHIP_ERROR Get(const PeerId & peer, CASESessionCachable & outCachableSession); | ||
|
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| private: | ||
| BitMapObjectPool<CASESessionCachable, CHIP_CONFIG_CASE_SESSION_RESUME_CACHE_SIZE> mCachePool; | ||
| CASESessionCachable * GetLRUSession(); | ||
| }; | ||
|
|
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| } // namespace chip |
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