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trezor-firmware/legacy/firmware/messages.h

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/*
* This file is part of the Trezor project, https://trezor.io/
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*
* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.com>
*
* This library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __MESSAGES_H__
#define __MESSAGES_H__
#include <stdbool.h>
#include <stdint.h>
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#include "trezor.h"
#include "usb.h"
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// The size of the message header "?##<2 bytes msg_id><4 bytes msg_size>".
#define MSG_HEADER_SIZE 9
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// Maximum size of an incoming protobuf-encoded message without headers.
#define MSG_IN_ENCODED_SIZE (16 * 1024)
// Maximum size of a C struct containing a decoded incoming message.
#define MSG_IN_DECODED_SIZE (16 * 1024)
// Buffer size for outgoing USB packets with headers.
#define MSG_OUT_BUFFER_SIZE (3 * 1024)
// Maximum size of an outgoing protobuf-encoded message without headers.
// (Continuation packets have a one byte "?" header.)
#define MSG_OUT_ENCODED_SIZE \
(MSG_OUT_BUFFER_SIZE - MSG_HEADER_SIZE - \
((MSG_OUT_BUFFER_SIZE / USB_PACKET_SIZE) - 1))
// Maximum size of a C struct containing a decoded outgoing message.
#define MSG_OUT_DECODED_SIZE (3 * 1024)
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#define msg_read(buf, len) msg_read_common('n', (buf), (len))
#define msg_write(id, ptr) msg_write_common('n', (id), (ptr))
const uint8_t *msg_out_data(void);
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#if DEBUG_LINK
// Buffer size for outgoing debuglink USB packets with headers.
#define MSG_DEBUG_OUT_BUFFER_SIZE (2 * 1024)
// Maximum size of an outgoing protobuf-encoded debug message without headers.
// (Continuation packets have a one byte "?" header.)
#define MSG_DEBUG_OUT_ENCODED_SIZE \
(MSG_DEBUG_OUT_BUFFER_SIZE - MSG_HEADER_SIZE - \
((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))
#define msg_debug_write(id, ptr) msg_write_common('d', (id), (ptr))
const uint8_t *msg_debug_out_data(void);
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#endif
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);
void msg_read_tiny(const uint8_t *buf, int len);
extern uint8_t msg_tiny[128];
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extern uint16_t msg_tiny_id;
#endif