3 files changed, 359 insertions, 0 deletions

diff --git a/tests/data/fuzz/levin/LEVIN1 b/tests/data/fuzz/levin/LEVIN1
new file mode 100644
index 000000000..51a640c61
--- /dev/null
+++ b/tests/data/fuzz/levin/LEVIN1
diff --git a/tests/fuzz/CMakeLists.txt b/tests/fuzz/CMakeLists.txt
index 2184ae48a..5d58f9a3c 100644
--- a/tests/fuzz/CMakeLists.txt
+++ b/tests/fuzz/CMakeLists.txt
@@ -152,3 +152,17 @@ set_property(TARGET http-client_fuzz_tests
   PROPERTY
     FOLDER "tests")
 
+add_executable(levin_fuzz_tests levin.cpp fuzzer.cpp)
+target_link_libraries(levin_fuzz_tests
+  PRIVATE
+    common
+    epee
+    ${Boost_THREAD_LIBRARY}
+    ${Boost_REGEX_LIBRARY}
+    ${Boost_PROGRAM_OPTIONS_LIBRARY}
+    ${CMAKE_THREAD_LIBS_INIT}
+    ${EXTRA_LIBRARIES})
+set_property(TARGET levin_fuzz_tests
+  PROPERTY
+    FOLDER "tests")
+
diff --git a/tests/fuzz/levin.cpp b/tests/fuzz/levin.cpp
new file mode 100644
index 000000000..2fd60ae50
--- /dev/null
+++ b/tests/fuzz/levin.cpp
@@ -0,0 +1,345 @@
+// Copyright (c) 2017, The Monero 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:
+// 
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+//    conditions and the following disclaimer.
+// 
+// 2. 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.
+// 
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+//    used to endorse or promote products derived from this software without specific
+//    prior written permission.
+// 
+// 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 HOLDER 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.
+
+#include "include_base_utils.h"
+#include "file_io_utils.h"
+#include "net/net_utils_base.h"
+#include "net/abstract_tcp_server2.h"
+#include "storages/levin_abstract_invoke2.h"
+#include "net/levin_protocol_handler_async.h"
+#include "fuzzer.h"
+
+namespace
+{
+  class call_counter
+  {
+  public:
+    call_counter() : m_counter(0) { }
+
+    // memory_order_relaxed is enough for call counter
+    void inc() volatile { m_counter.fetch_add(1, std::memory_order_relaxed); }
+    size_t get() volatile const { return m_counter.load(std::memory_order_relaxed); }
+    void reset() volatile { m_counter.store(0, std::memory_order_relaxed); }
+
+  private:
+    std::atomic<size_t> m_counter;
+  };
+
+  struct test_levin_connection_context : public epee::net_utils::connection_context_base
+  {
+  };
+
+  typedef epee::levin::async_protocol_handler_config<test_levin_connection_context> test_levin_protocol_handler_config;
+  typedef epee::levin::async_protocol_handler<test_levin_connection_context> test_levin_protocol_handler;
+
+  struct test_levin_commands_handler : public epee::levin::levin_commands_handler<test_levin_connection_context>
+  {
+    test_levin_commands_handler()
+      : m_return_code(LEVIN_OK)
+      , m_last_command(-1)
+    {
+    }
+
+    virtual int invoke(int command, const std::string& in_buff, std::string& buff_out, test_levin_connection_context& context)
+    {
+      m_invoke_counter.inc();
+      boost::unique_lock<boost::mutex> lock(m_mutex);
+      m_last_command = command;
+      m_last_in_buf = in_buff;
+      buff_out = m_invoke_out_buf;
+      return m_return_code;
+    }
+
+    virtual int notify(int command, const std::string& in_buff, test_levin_connection_context& context)
+    {
+      m_notify_counter.inc();
+      boost::unique_lock<boost::mutex> lock(m_mutex);
+      m_last_command = command;
+      m_last_in_buf = in_buff;
+      return m_return_code;
+    }
+
+    virtual void callback(test_levin_connection_context& context)
+    {
+      m_callback_counter.inc();
+      //std::cout << "test_levin_commands_handler::callback()" << std::endl;
+    }
+
+    virtual void on_connection_new(test_levin_connection_context& context)
+    {
+      m_new_connection_counter.inc();
+      //std::cout << "test_levin_commands_handler::on_connection_new()" << std::endl;
+    }
+
+    virtual void on_connection_close(test_levin_connection_context& context)
+    {
+      m_close_connection_counter.inc();
+      //std::cout << "test_levin_commands_handler::on_connection_close()" << std::endl;
+    }
+
+    size_t invoke_counter() const { return m_invoke_counter.get(); }
+    size_t notify_counter() const { return m_notify_counter.get(); }
+    size_t callback_counter() const { return m_callback_counter.get(); }
+    size_t new_connection_counter() const { return m_new_connection_counter.get(); }
+    size_t close_connection_counter() const { return m_close_connection_counter.get(); }
+
+    int return_code() const { return m_return_code; }
+    void return_code(int v) { m_return_code = v; }
+
+    const std::string& invoke_out_buf() const { return m_invoke_out_buf; }
+    void invoke_out_buf(const std::string& v) { m_invoke_out_buf = v; }
+
+    int last_command() const { return m_last_command; }
+    const std::string& last_in_buf() const { return m_last_in_buf; }
+
+  private:
+    call_counter m_invoke_counter;
+    call_counter m_notify_counter;
+    call_counter m_callback_counter;
+    call_counter m_new_connection_counter;
+    call_counter m_close_connection_counter;
+
+    boost::mutex m_mutex;
+
+    int m_return_code;
+    std::string m_invoke_out_buf;
+
+    int m_last_command;
+    std::string m_last_in_buf;
+  };
+
+  class test_connection : public epee::net_utils::i_service_endpoint
+  {
+  public:
+    test_connection(boost::asio::io_service& io_service, test_levin_protocol_handler_config& protocol_config)
+      : m_io_service(io_service)
+      , m_protocol_handler(this, protocol_config, m_context)
+      , m_send_return(true)
+    {
+    }
+
+    void start()
+    {
+      m_protocol_handler.after_init_connection();
+    }
+
+    // Implement epee::net_utils::i_service_endpoint interface
+    virtual bool do_send(const void* ptr, size_t cb)
+    {
+      m_send_counter.inc();
+      boost::unique_lock<boost::mutex> lock(m_mutex);
+      m_last_send_data.append(reinterpret_cast<const char*>(ptr), cb);
+      return m_send_return;
+    }
+
+    virtual bool close()                              { return true; }
+    virtual bool call_run_once_service_io()           { return true; }
+    virtual bool request_callback()                   { return true; }
+    virtual boost::asio::io_service& get_io_service() { return m_io_service; }
+    virtual bool add_ref()                            { return true; }
+    virtual bool release()                            { return true; }
+
+    size_t send_counter() const { return m_send_counter.get(); }
+
+    const std::string& last_send_data() const { return m_last_send_data; }
+    void reset_last_send_data() { boost::unique_lock<boost::mutex> lock(m_mutex); m_last_send_data.clear(); }
+
+    bool send_return() const { return m_send_return; }
+    void send_return(bool v) { m_send_return = v; }
+
+  public:
+    test_levin_connection_context m_context;
+    test_levin_protocol_handler m_protocol_handler;
+
+  private:
+    boost::asio::io_service& m_io_service;
+
+    call_counter m_send_counter;
+    boost::mutex m_mutex;
+
+    std::string m_last_send_data;
+
+    bool m_send_return;
+  };
+
+#if 0
+  class async_protocol_handler_test : public ::testing::Test
+  {
+  public:
+    const static uint64_t invoke_timeout = 5 * 1000;
+    const static size_t max_packet_size = 10 * 1024 * 1024;
+
+    typedef std::unique_ptr<test_connection> test_connection_ptr;
+
+    async_protocol_handler_test():
+      m_pcommands_handler(new test_levin_commands_handler()),
+      m_commands_handler(*m_pcommands_handler)
+    {
+      m_handler_config.set_handler(m_pcommands_handler, [](epee::levin::levin_commands_handler<test_levin_connection_context> *handler) { delete handler; });
+      m_handler_config.m_invoke_timeout = invoke_timeout;
+      m_handler_config.m_max_packet_size = max_packet_size;
+    }
+
+    virtual void SetUp()
+    {
+    }
+
+  protected:
+    test_connection_ptr create_connection(bool start = true)
+    {
+      test_connection_ptr conn(new test_connection(m_io_service, m_handler_config));
+      if (start)
+      {
+        conn->start();
+      }
+      return conn;
+    }
+
+  protected:
+    boost::asio::io_service m_io_service;
+    test_levin_protocol_handler_config m_handler_config;
+    test_levin_commands_handler *m_pcommands_handler, &m_commands_handler;
+  };
+
+  class positive_test_connection_to_levin_protocol_handler_calls : public async_protocol_handler_test
+  {
+  };
+
+  class test_levin_protocol_handler__hanle_recv_with_invalid_data : public async_protocol_handler_test
+  {
+  public:
+    static const int expected_command = 5615871;
+    static const int expected_return_code = 782546;
+
+    test_levin_protocol_handler__hanle_recv_with_invalid_data()
+      : m_expected_invoke_out_buf(512, 'y')
+    {
+    }
+
+    virtual void SetUp()
+    {
+      async_protocol_handler_test::SetUp();
+
+      m_conn = create_connection();
+
+      m_in_data.assign(256, 't');
+
+      m_req_head.m_signature = LEVIN_SIGNATURE;
+      m_req_head.m_cb = m_in_data.size();
+      m_req_head.m_have_to_return_data = true;
+      m_req_head.m_command = expected_command;
+      m_req_head.m_return_code = LEVIN_OK;
+      m_req_head.m_flags = LEVIN_PACKET_REQUEST;
+      m_req_head.m_protocol_version = LEVIN_PROTOCOL_VER_1;
+
+      m_commands_handler.return_code(expected_return_code);
+      m_commands_handler.invoke_out_buf(m_expected_invoke_out_buf);
+    }
+
+  protected:
+    void prepare_buf()
+    {
+      m_buf.assign(reinterpret_cast<const char*>(&m_req_head), sizeof(m_req_head));
+      m_buf += m_in_data;
+    }
+
+  protected:
+    test_connection_ptr m_conn;
+    epee::levin::bucket_head2 m_req_head;
+    std::string m_in_data;
+    std::string m_buf;
+    std::string m_expected_invoke_out_buf;
+  };
+#endif
+}
+
+class LevinFuzzer: public Fuzzer
+{
+public:
+  LevinFuzzer() {} //: handler(endpoint, config, context) {}
+  virtual int init();
+  virtual int run(const std::string &filename);
+
+private:
+  //epee::net_utils::connection_context_base context;
+  //epee::levin::async_protocol_handler<> handler;
+};
+
+int LevinFuzzer::init()
+{
+  return 0;
+}
+
+int LevinFuzzer::run(const std::string &filename)
+{
+  std::string s;
+
+//
+  epee::levin::bucket_head2 req_head;
+  req_head.m_signature = LEVIN_SIGNATURE;
+  req_head.m_cb = 0;
+  req_head.m_have_to_return_data = true;
+  req_head.m_command = 2000;
+  req_head.m_flags = LEVIN_PACKET_REQUEST;
+  req_head.m_protocol_version = LEVIN_PROTOCOL_VER_1;
+  FILE *f=fopen("/tmp/out.levin", "w");
+  fwrite(&req_head,sizeof(req_head),1, f);
+  fclose(f);
+//
+  if (!epee::file_io_utils::load_file_to_string(filename, s))
+  {
+    std::cout << "Error: failed to load file " << filename << std::endl;
+    return 1;
+  }
+  try
+  {
+    //std::unique_ptr<test_connection> conn = new test();
+    boost::asio::io_service io_service;
+    test_levin_protocol_handler_config m_handler_config;
+    test_levin_commands_handler *m_pcommands_handler = new test_levin_commands_handler();
+    m_handler_config.set_handler(m_pcommands_handler, [](epee::levin::levin_commands_handler<test_levin_connection_context> *handler) { delete handler; });
+    std::unique_ptr<test_connection> conn(new test_connection(io_service, m_handler_config));
+    conn->start();
+    //m_commands_handler.invoke_out_buf(expected_out_data);
+    //m_commands_handler.return_code(expected_return_code);
+    conn->m_protocol_handler.handle_recv(s.data(), s.size());
+  }
+  catch (const std::exception &e)
+  {
+    std::cerr << "Failed to test http client: " << e.what() << std::endl;
+    return 1;
+  }
+  return 0;
+}
+
+int main(int argc, const char **argv)
+{
+  LevinFuzzer fuzzer;
+  return run_fuzzer(argc, argv, fuzzer);
+}
+