/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_ipc_Faulty_h

#define mozilla_ipc_Faulty_h

#include <set>

#include <string>

#include <vector>

#include "base/string16.h"

#include "base/singleton.h"

#include "nsDebug.h"

#include "nsTArray.h"

#define FAULTY_DEFAULT_PROBABILITY 1000

#define FAULTY_DEFAULT_MUTATION_FACTOR 10

#define FAULTY_LOG(fmt, args...) \

  if (mozilla::ipc::Faulty::IsLoggingEnabled()) { \

    printf_stderr("[Faulty] (%10u) " fmt "\n", getpid(), ## args); \

  }

namespace IPC {

  // Needed for blacklisting messages.

  class Message;

}

namespace mozilla {

namespace ipc {

class Faulty

{

  public:

    // Used as a default argument for the Fuzz|datatype| methods.

    static const unsigned int sDefaultProbability;

    static unsigned int DefaultProbability(void);

    static bool Logging(void);

    static bool IsLoggingEnabled(void) { return sIsLoggingEnabled; }

    static std::vector<uint8_t> GetDataFromIPCMessage(IPC::Message* aMsg);

    static nsresult CreateOutputDirectory(const char *aPathname);

    static nsresult ReadFile(const char* aPathname, nsTArray<nsCString> &aArray);

    static void CopyFDs(IPC::Message* aDstMsg, IPC::Message* aSrcMsg);

    // Fuzzing methods for Pickle.

    void FuzzBool(bool* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzChar(char* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzUChar(unsigned char* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzInt16(int16_t* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzUInt16(uint16_t* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzInt(int* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzUInt32(uint32_t* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzLong(long* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzULong(unsigned long* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzInt64(int64_t* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzUInt64(uint64_t* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzSize(size_t* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzFloat(float* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzDouble(double* aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzString(std::string& aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzWString(std::wstring& aValue, unsigned int aProbability=sDefaultProbability);

    void FuzzBytes(void* aData, int aLength, unsigned int aProbability=sDefaultProbability);

    // Fuzzing methods for pipe fuzzing.

    void MaybeCollectAndClosePipe(int aPipe, unsigned int aProbability=sDefaultProbability);

    // Fuzzing methods for message blob fuzzing.

    void DumpMessage(const char *aChannel, IPC::Message* aMsg, std::string aAppendix=nullptr);

    bool IsMessageNameBlacklisted(const char* aMessageName);

    IPC::Message* MutateIPCMessage(const char *aChannel, IPC::Message* aMsg,

      unsigned int aProbability=sDefaultProbability);

    void LogMessage(const char* aChannel, IPC::Message* aMsg);

  private:

    std::set<int> mFds;

    const bool mFuzzMessages;

    const bool mFuzzPipes;

    const bool mFuzzPickle;

    const bool mUseLargeValues;

    const bool mUseAsWhitelist;

    const bool mIsValidProcessType;

    const char* mMessagePath;

    const char* mBlacklistPath;

    size_t sMsgCounter;

    static const bool sIsLoggingEnabled;

    Faulty();

    friend struct DefaultSingletonTraits<Faulty>;

    DISALLOW_EVIL_CONSTRUCTORS(Faulty);

    static bool IsValidProcessType(void);

    static uint32_t MutationFactor();

    // Fuzzing methods for Pickle

    void MutateBool(bool* aValue);

    void MutateChar(char* aValue);

    void MutateUChar(unsigned char* aValue);

    void MutateInt16(int16_t* aValue);

    void MutateUInt16(uint16_t* aValue);

    void MutateInt(int* aValue);

    void MutateUInt32(uint32_t* aValue);

    void MutateLong(long* aValue);

    void MutateULong(unsigned long* aValue);

    void MutateInt64(int64_t* aValue);

    void MutateUInt64(uint64_t* aValue);

    void MutateSize(size_t* aValue);

    void MutateFloat(float* aValue);

    void MutateDouble(double* aValue);

};

} // namespace ipc

} // namespace mozilla

#endif