45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
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/*
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* Copyright (c) 2020 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define BT_MESH_DFU_OP_UPDATE_INFO_GET BT_MESH_MODEL_OP_2(0x83, 0x08)
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#define BT_MESH_DFU_OP_UPDATE_INFO_STATUS BT_MESH_MODEL_OP_2(0x83, 0x09)
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#define BT_MESH_DFU_OP_UPDATE_METADATA_CHECK BT_MESH_MODEL_OP_2(0x83, 0x0a)
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#define BT_MESH_DFU_OP_UPDATE_METADATA_STATUS BT_MESH_MODEL_OP_2(0x83, 0x0b)
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#define BT_MESH_DFU_OP_UPDATE_GET BT_MESH_MODEL_OP_2(0x83, 0x0c)
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#define BT_MESH_DFU_OP_UPDATE_START BT_MESH_MODEL_OP_2(0x83, 0x0d)
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#define BT_MESH_DFU_OP_UPDATE_CANCEL BT_MESH_MODEL_OP_2(0x83, 0x0e)
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#define BT_MESH_DFU_OP_UPDATE_APPLY BT_MESH_MODEL_OP_2(0x83, 0x0f)
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#define BT_MESH_DFU_OP_UPDATE_STATUS BT_MESH_MODEL_OP_2(0x83, 0x10)
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#define DFU_UPDATE_INFO_STATUS_MSG_MINLEN (4 + CONFIG_BT_MESH_DFU_FWID_MAXLEN + \
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CONFIG_BT_MESH_DFU_URI_MAXLEN)
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#define DFU_UPDATE_START_MSG_MAXLEN (12 + CONFIG_BT_MESH_DFU_METADATA_MAXLEN)
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static inline uint16_t dfu_metadata_checksum(struct net_buf_simple *buf)
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{
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/* Simple Fletcher-16 checksum to ensure duplicate start messages don't
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* have different metadata.
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*/
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struct net_buf_simple_state state;
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uint8_t sum[2] = {0, 0};
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net_buf_simple_save(buf, &state);
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while (buf->len) {
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uint8_t byte = net_buf_simple_pull_u8(buf);
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sum[0] += byte;
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sum[1] += sum[0];
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}
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net_buf_simple_restore(buf, &state);
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return (sum[0] << 8U) | sum[1];
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}
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