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64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
/*
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* Copyright (c) 2017, Pelion and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "nsconfig.h"
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#include "ns_types.h"
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#include "common_functions.h"
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#include "Security/PANA/pana_header.h"
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#ifdef PANA
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#define PANA_HEADER_START 0x0000
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bool pana_header_parse(uint8_t *ptr, uint16_t data_length, pana_header_t *header)
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{
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if (data_length < 16) {
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return false;
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}
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if (common_read_16_bit(ptr) != PANA_HEADER_START) {
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return false;
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}
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header->payload_len = common_read_16_bit(ptr + 2);
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ptr += 4;
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if (header->payload_len != data_length) {
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return false;
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}
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header->flags = common_read_16_bit(ptr);
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header->type = common_read_16_bit(ptr + 2);
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ptr += 4;
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header->session_id = common_read_32_bit(ptr);
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ptr += 4;
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header->seq = common_read_32_bit(ptr);
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return true;
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}
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uint8_t *pana_header_write(uint8_t *ptr, const pana_header_t *header)
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{
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ptr = common_write_16_bit(PANA_HEADER_START, ptr);
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ptr = common_write_16_bit(header->payload_len, ptr);
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ptr = common_write_16_bit(header->flags, ptr);
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ptr = common_write_16_bit(header->type, ptr);
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ptr = common_write_32_bit(header->session_id, ptr);
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return common_write_32_bit(header->seq, ptr);
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}
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#endif
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