mirror of
https://github.com/espressif/openthread.git
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Abtin Keshavarzian
7a7d0c6cbd
This commit updates and enhances the CRC module. It updates the implementation to allow both CRC16 and CRC32 calculation with different polynomials. It adds new `Feed()` methods to add bytes from a buffer or from a message into CRC computation. It also adds a unit test to cover CRC calculation (both CRC16 and CRC32).
117 lines
4.1 KiB
C++
117 lines
4.1 KiB
C++
/*
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* Copyright (c) 2025, The OpenThread Authors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "common/crc.hpp"
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#include "test_platform.h"
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#include "test_util.hpp"
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namespace ot {
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void TestCrc16(void)
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{
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struct TestCase
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{
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const uint8_t *mData;
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uint16_t mDataLength;
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uint16_t mExpectedCcittCrc16;
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uint16_t mExpectedAnsiCrc16;
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};
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static const uint8_t kTestData1[] = {0xff};
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static const uint8_t kTestData2[] = {0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39}; // "123456789"
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static const uint8_t kTestData3[] = {0x10, 0x20, 0x03, 0x15, 0xbe, 0xef, 0xca, 0xfe};
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static const TestCase kTestCases[] = {
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{kTestData1, sizeof(kTestData1), 0x1ef0, 0x0202},
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{kTestData2, sizeof(kTestData2), 0x31c3, 0xfee8},
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{kTestData3, sizeof(kTestData3), 0x926a, 0x070c},
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};
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printf("\nTestCrc16");
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for (const TestCase &testCase : kTestCases)
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{
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CrcCalculator<uint16_t> ccitt(kCrc16CcittPolynomial);
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CrcCalculator<uint16_t> ansi(kCrc16AnsiPolynomial);
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ccitt.FeedBytes(testCase.mData, testCase.mDataLength);
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ansi.FeedBytes(testCase.mData, testCase.mDataLength);
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DumpBuffer("CRC16", testCase.mData, testCase.mDataLength);
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printf("-> CCIT: 0x%04x, ANSI: 0x%04x\n", ccitt.GetCrc(), ansi.GetCrc());
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VerifyOrQuit(ccitt.GetCrc() == testCase.mExpectedCcittCrc16);
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VerifyOrQuit(ansi.GetCrc() == testCase.mExpectedAnsiCrc16);
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}
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}
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void TestCrc32(void)
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{
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struct TestCase
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{
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const uint8_t *mData;
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uint16_t mDataLength;
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uint32_t mExpectedAnsiCrc32;
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};
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static const uint8_t kTestData1[] = {0xff};
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static const uint8_t kTestData2[] = {0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39}; // "123456789"
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static const uint8_t kTestData3[] = {0x10, 0x20, 0x03, 0x15, 0xbe, 0xef, 0xca, 0xfe};
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static const TestCase kTestCases[] = {
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{kTestData1, sizeof(kTestData1), 0xb1f740b4},
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{kTestData2, sizeof(kTestData2), 0x89a1897f},
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{kTestData3, sizeof(kTestData3), 0xd651e770},
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};
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printf("\nTestCrc32\n");
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for (const TestCase &testCase : kTestCases)
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{
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CrcCalculator<uint32_t> crc32(kCrc32AnsiPolynomial);
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crc32.FeedBytes(testCase.mData, testCase.mDataLength);
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DumpBuffer("CRC32", testCase.mData, testCase.mDataLength);
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printf("-> 0x%08lx\n", ToUlong(crc32.GetCrc()));
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VerifyOrQuit(crc32.GetCrc() == testCase.mExpectedAnsiCrc32);
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}
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}
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} // namespace ot
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int main(void)
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{
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ot::TestCrc16();
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ot::TestCrc32();
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printf("All tests passed\n");
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return 0;
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}
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