json serialization for rpc-relevant monero types

Structured {de-,}serialization methods for (many new) types
which are used for requests or responses in the RPC.

New types include RPC requests and responses, and structs which compose
types within those.

# Conflicts:
#	src/cryptonote_core/blockchain.cpp

1 files changed, 146 insertions, 0 deletions

diff --git a/src/rpc/zmq_server.cpp b/src/rpc/zmq_server.cpp
new file mode 100644
index 000000000..8e1e47b38
--- /dev/null
+++ b/src/rpc/zmq_server.cpp
@@ -0,0 +1,146 @@
+// Copyright (c) 2016, 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 "zmq_server.h"
+#include <boost/chrono/chrono.hpp>
+
+namespace cryptonote
+{
+
+namespace rpc
+{
+
+ZmqServer::ZmqServer(RpcHandler& h) :
+    handler(h),
+    stop_signal(false),
+    running(false),
+    context(DEFAULT_NUM_ZMQ_THREADS) // TODO: make this configurable
+{
+}
+
+ZmqServer::~ZmqServer()
+{
+  for (zmq::socket_t* socket : sockets)
+  {
+    delete socket;
+  }
+}
+
+void ZmqServer::serve()
+{
+
+  while (1)
+  {
+    try
+    {
+      for (zmq::socket_t* socket : sockets)
+      {
+        zmq::message_t message;
+
+        while (socket->recv(&message))
+        {
+          std::string message_string(reinterpret_cast<const char *>(message.data()), message.size());
+
+          MDEBUG(std::string("Received RPC request: \"") + message_string + "\"");
+
+          std::string response = handler.handle(message_string);
+
+          zmq::message_t reply(response.size());
+          memcpy((void *) reply.data(), response.c_str(), response.size());
+
+          socket->send(reply);
+          MDEBUG(std::string("Sent RPC reply: \"") + response + "\"");
+        }
+
+      }
+    }
+    catch (boost::thread_interrupted& e)
+    {
+      MDEBUG("ZMQ Server thread interrupted.");
+    }
+    boost::this_thread::interruption_point();
+  }
+}
+
+bool ZmqServer::addIPCSocket(std::string address, std::string port)
+{
+  MERROR("ZmqServer::addIPCSocket not yet implemented!");
+  return false;
+}
+
+bool ZmqServer::addTCPSocket(std::string address, std::string port)
+{
+  zmq::socket_t *new_socket = nullptr;
+  try
+  {
+    std::string addr_prefix("tcp://");
+
+    new_socket = new zmq::socket_t(context, ZMQ_REP);
+
+    new_socket->setsockopt(ZMQ_RCVTIMEO, DEFAULT_RPC_RECV_TIMEOUT_MS);
+
+    std::string bind_address = addr_prefix + address + std::string(":") + port;
+    new_socket->bind(bind_address.c_str());
+    sockets.push_back(new_socket);
+  }
+  catch (std::exception& e)
+  {
+    MERROR(std::string("Error creating ZMQ Socket: ") + e.what());
+    if (new_socket)
+    {
+      delete new_socket;
+    }
+    return false;
+  }
+  return true;
+}
+
+void ZmqServer::run()
+{
+  running = true;
+  run_thread = boost::thread(boost::bind(&ZmqServer::serve, this));
+}
+
+void ZmqServer::stop()
+{
+  if (!running) return;
+
+  stop_signal = true;
+
+  run_thread.interrupt();
+  run_thread.join();
+
+  running = false;
+
+  return;
+}
+
+
+}  // namespace cryptonote
+
+}  // namespace rpc