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/*
* Copyright (C) 2018 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#pragma once
#include <sys/types.h>
#include <unistd.h>
#include <chrono>
#include <cstdlib>
#include <fstream>
#include <string>
#include <vector>
#include "usb.h"
namespace fastboot {
/* A special class for sniffing reads and writes
*
* A useful debugging tool is to see the raw fastboot transactions going between
* the host and device. This class wraps the UsbTransport class, and snoops and saves
* all the transactions going on. Additionally, if there is a console serial port
* from the device, this class can monitor it as well and capture the interleaving of
* transport transactions and UART log messages.
*/
class UsbTransportSniffer : public UsbTransport {
public:
enum EventType {
READ,
WRITE,
RESET,
SERIAL, // Serial log message from device
READ_ERROR,
WRITE_ERROR,
};
struct Event {
Event(EventType t, const std::vector<char> cbuf) : type(t), buf(cbuf) {
start = std::chrono::high_resolution_clock::now();
};
EventType type;
std::chrono::high_resolution_clock::time_point start;
const std::vector<char> buf;
};
UsbTransportSniffer(std::unique_ptr<UsbTransport> transport, const int serial_fd = 0);
~UsbTransportSniffer() override;
virtual ssize_t Read(void* data, size_t len) override;
virtual ssize_t Write(const void* data, size_t len) override;
virtual int Close() override final; // note usage in destructor
virtual int Reset() override;
const std::vector<Event> Transfers();
std::string CreateTrace();
void ProcessSerial();
private:
std::vector<Event> transfers_;
std::unique_ptr<UsbTransport> transport_;
const int serial_fd_;
};
} // End namespace fastboot
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