face: support IPv6-only WebSocket channels

Change-Id: Ib9ba27d04611c13882e50995d701fc1b707cea5f
Refs: #4710
diff --git a/tests/daemon/face/websocket-channel-fixture.hpp b/tests/daemon/face/websocket-channel-fixture.hpp
new file mode 100644
index 0000000..5500281
--- /dev/null
+++ b/tests/daemon/face/websocket-channel-fixture.hpp
@@ -0,0 +1,163 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2018,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_TESTS_DAEMON_FACE_WEBSOCKET_CHANNEL_FIXTURE_HPP
+#define NFD_TESTS_DAEMON_FACE_WEBSOCKET_CHANNEL_FIXTURE_HPP
+
+#include "face/websocket-channel.hpp"
+
+#include "channel-fixture.hpp"
+
+namespace nfd {
+namespace face {
+namespace tests {
+
+class WebSocketChannelFixture : public ChannelFixture<WebSocketChannel, websocket::Endpoint>
+{
+protected:
+  unique_ptr<WebSocketChannel>
+  makeChannel(const boost::asio::ip::address& addr, uint16_t port = 0) final
+  {
+    if (port == 0)
+      port = getNextPort();
+
+    return make_unique<WebSocketChannel>(websocket::Endpoint(addr, port));
+  }
+
+  void
+  listen(const boost::asio::ip::address& addr,
+         const time::milliseconds& pingInterval = 10_s,
+         const time::milliseconds& pongTimeout = 1_s)
+  {
+    listenerEp = websocket::Endpoint(addr, 20030);
+    listenerChannel = makeChannel(addr, 20030);
+    listenerChannel->setPingInterval(pingInterval);
+    listenerChannel->setPongTimeout(pongTimeout);
+    listenerChannel->listen(bind(&WebSocketChannelFixture::listenerOnFaceCreated, this, _1));
+  }
+
+  void
+  clientConnect(websocket::Client& client)
+  {
+    client.clear_access_channels(websocketpp::log::alevel::all);
+    client.clear_error_channels(websocketpp::log::elevel::all);
+
+    client.init_asio(&g_io);
+    client.set_open_handler(bind(&WebSocketChannelFixture::clientHandleOpen, this, _1));
+    client.set_message_handler(bind(&WebSocketChannelFixture::clientHandleMessage, this, _1, _2));
+    client.set_ping_handler(bind(&WebSocketChannelFixture::clientHandlePing, this, _1, _2));
+
+    websocketpp::lib::error_code ec;
+    auto con = client.get_connection(FaceUri(listenerEp, "ws").toString(), ec);
+    BOOST_REQUIRE_EQUAL(ec, websocketpp::lib::error_code());
+
+    client.connect(con);
+  }
+
+  void
+  initialize(const boost::asio::ip::address& addr,
+             const time::milliseconds& pingInterval = 10_s,
+             const time::milliseconds& pongTimeout = 1_s)
+  {
+    listen(addr, pingInterval, pongTimeout);
+    clientConnect(client);
+    BOOST_REQUIRE_EQUAL(limitedIo.run(2, // listenerOnFaceCreated, clientHandleOpen
+                                      1_s), LimitedIo::EXCEED_OPS);
+    BOOST_REQUIRE_EQUAL(listenerChannel->size(), 1);
+  }
+
+  void
+  clientSendInterest(const Interest& interest)
+  {
+    const Block& payload = interest.wireEncode();
+    client.send(clientHandle, payload.wire(), payload.size(), websocketpp::frame::opcode::binary);
+  }
+
+private:
+  void
+  listenerOnFaceCreated(const shared_ptr<Face>& newFace)
+  {
+    BOOST_REQUIRE(newFace != nullptr);
+    newFace->afterReceiveInterest.connect(bind(&WebSocketChannelFixture::faceAfterReceiveInterest, this, _1));
+    connectFaceClosedSignal(*newFace, [this] { limitedIo.afterOp(); });
+    listenerFaces.push_back(newFace);
+    limitedIo.afterOp();
+  }
+
+  void
+  faceAfterReceiveInterest(const Interest& interest)
+  {
+    faceReceivedInterests.push_back(interest);
+    limitedIo.afterOp();
+  }
+
+  void
+  clientHandleOpen(websocketpp::connection_hdl hdl)
+  {
+    clientHandle = hdl;
+    limitedIo.afterOp();
+  }
+
+  void
+  clientHandleMessage(websocketpp::connection_hdl, websocket::Client::message_ptr msg)
+  {
+    clientReceivedMessages.push_back(msg->get_payload());
+    limitedIo.afterOp();
+  }
+
+  bool
+  clientHandlePing(websocketpp::connection_hdl, std::string)
+  {
+    auto now = time::steady_clock::now();
+    if (m_prevPingRecvTime != time::steady_clock::TimePoint()) {
+      measuredPingInterval = now - m_prevPingRecvTime;
+    }
+    m_prevPingRecvTime = now;
+
+    limitedIo.afterOp();
+    return clientShouldPong;
+  }
+
+protected:
+  std::vector<Interest> faceReceivedInterests;
+
+  websocket::Client client;
+  websocketpp::connection_hdl clientHandle;
+  std::vector<std::string> clientReceivedMessages;
+
+  time::steady_clock::Duration measuredPingInterval;
+  // set clientShouldPong to false to disable the pong response,
+  // which will eventually cause a timeout in listenerChannel
+  bool clientShouldPong = true;
+
+private:
+  time::steady_clock::TimePoint m_prevPingRecvTime;
+};
+
+} // namespace tests
+} // namespace face
+} // namespace nfd
+
+#endif // NFD_TESTS_DAEMON_FACE_WEBSOCKET_CHANNEL_FIXTURE_HPP