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https://github.com/trezor/trezor-firmware.git
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a36439a57f
Distinguish between the maximum size of a protobuf-encoded message and the maximum size of a C struct containing a decoded message.
78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __MESSAGES_H__
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#define __MESSAGES_H__
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#include <stdbool.h>
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#include <stdint.h>
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#include "trezor.h"
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#include "usb.h"
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// The size of the message header "?##<2 bytes msg_id><4 bytes msg_size>".
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#define MSG_HEADER_SIZE 9
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// Maximum size of an incoming protobuf-encoded message without headers.
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#define MSG_IN_ENCODED_SIZE (15 * 1024)
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// Maximum size of a C struct containing a decoded incoming message.
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#define MSG_IN_DECODED_SIZE (15 * 1024)
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// Buffer size for outgoing USB packets with headers.
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#define MSG_OUT_BUFFER_SIZE (3 * 1024)
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// Maximum size of an outgoing protobuf-encoded message without headers.
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// (Continuation packets have a one byte "?" header.)
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#define MSG_OUT_ENCODED_SIZE \
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(MSG_OUT_BUFFER_SIZE - MSG_HEADER_SIZE - \
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((MSG_OUT_BUFFER_SIZE / USB_PACKET_SIZE) - 1))
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// Maximum size of a C struct containing a decoded outgoing message.
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#define MSG_OUT_DECODED_SIZE (3 * 1024)
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#define msg_read(buf, len) msg_read_common('n', (buf), (len))
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#define msg_write(id, ptr) msg_write_common('n', (id), (ptr))
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const uint8_t *msg_out_data(void);
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#if DEBUG_LINK
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// Buffer size for outgoing debuglink USB packets with headers.
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#define MSG_DEBUG_OUT_BUFFER_SIZE (2 * 1024)
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// Maximum size of an outgoing protobuf-encoded debug message without headers.
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// (Continuation packets have a one byte "?" header.)
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#define MSG_DEBUG_OUT_ENCODED_SIZE \
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(MSG_DEBUG_OUT_BUFFER_SIZE - MSG_HEADER_SIZE - \
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((MSG_DEBUG_OUT_BUFFER_SIZE / USB_PACKET_SIZE) - 1))
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#define msg_debug_read(buf, len) msg_read_common('d', (buf), (len))
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#define msg_debug_write(id, ptr) msg_write_common('d', (id), (ptr))
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const uint8_t *msg_debug_out_data(void);
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#endif
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void msg_read_common(char type, const uint8_t *buf, uint32_t len);
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bool msg_write_common(char type, uint16_t msg_id, const void *msg_ptr);
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void msg_read_tiny(const uint8_t *buf, int len);
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extern uint8_t msg_tiny[128];
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extern uint16_t msg_tiny_id;
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#endif
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