64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/*
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Cubesat Space Protocol - A small network-layer protocol designed for Cubesats
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Copyright (C) 2012 GomSpace ApS (http://www.gomspace.com)
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Copyright (C) 2012 AAUSAT3 Project (http://aausat3.space.aau.dk)
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _CSP_CRC32_H_
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#define _CSP_CRC32_H_
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#include <csp/csp.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Generate precomputed CRC32 table
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*/
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void csp_crc32_gentab(void);
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/**
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* Append CRC32 checksum to packet
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* @param packet Packet to append checksum
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* @param include_header use header in calculation (this will not modify the flags field)
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* @return 0 on success, -1 on error
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*/
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int csp_crc32_append(csp_packet_t * packet, bool include_header);
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/**
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* Verify CRC32 checksum on packet
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* @param packet Packet to verify
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* @param include_header use header in calculation (this will not modify the flags field)
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* @return 0 if checksum is valid, -1 otherwise
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*/
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int csp_crc32_verify(csp_packet_t * packet, bool include_header);
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/**
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* Calculate checksum for a given memory area
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* @param data pointer to memory
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* @param length length of memory to do checksum on
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* @return return uint32_t checksum
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*/
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uint32_t csp_crc32_memory(const uint8_t * data, uint32_t length);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* _CSP_CRC32_H_ */
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