src: Reorganizing source code in preparation to merge NRD code

Note that as of this commit, there are several changes in location of
compiled binaries in `build/` folder:

* `nfd` has been moved to `build/bin/nfd`
* `unit-tests` has been split into `unit-tests-core` and `unit-tests-daemon`

Change-Id: I2c830c117879edbaa5457d6423c13f0273285919
Refs: #1486
diff --git a/core/face-uri.cpp b/core/face-uri.cpp
new file mode 100644
index 0000000..7eaaddd
--- /dev/null
+++ b/core/face-uri.cpp
@@ -0,0 +1,151 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014  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
+ *
+ * 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/>.
+ **/
+
+#include "face-uri.hpp"
+#include "core/logger.hpp"
+
+#ifdef HAVE_LIBPCAP
+#include "ethernet.hpp"
+#endif // HAVE_LIBPCAP
+
+#include <boost/regex.hpp>
+
+NFD_LOG_INIT("FaceUri");
+
+namespace nfd {
+
+FaceUri::FaceUri(const std::string& uri)
+{
+  if (!parse(uri)) {
+    throw Error("Malformed URI: " + uri);
+  }
+}
+
+FaceUri::FaceUri(const char* uri)
+{
+  if (!parse(uri)) {
+    throw Error("Malformed URI: " + std::string(uri));
+  }
+}
+
+bool
+FaceUri::parse(const std::string& uri)
+{
+  m_scheme.clear();
+  m_host.clear();
+  m_isV6 = false;
+  m_port.clear();
+  m_path.clear();
+
+  static const boost::regex protocolExp("(\\w+\\d?)://([^/]*)(\\/[^?]*)?");
+  boost::smatch protocolMatch;
+  if (!boost::regex_match(uri, protocolMatch, protocolExp)) {
+    return false;
+  }
+  m_scheme = protocolMatch[1];
+  const std::string& authority = protocolMatch[2];
+  m_path = protocolMatch[3];
+
+  // pattern for IPv6 address enclosed in [ ], with optional port number
+  static const boost::regex v6Exp("^\\[([a-fA-F0-9:]+)\\](?:\\:(\\d+))?$");
+  // pattern for Ethernet address in standard hex-digits-and-colons notation
+  static const boost::regex etherExp("^((?:[a-fA-F0-9]{1,2}\\:){5}(?:[a-fA-F0-9]{1,2}))$");
+  // pattern for IPv4/hostname/fd/ifname, with optional port number
+  static const boost::regex v4HostExp("^([^:]+)(?:\\:(\\d+))?$");
+
+  if (authority.empty()) {
+    // UNIX, internal
+  }
+  else {
+    boost::smatch match;
+    m_isV6 = boost::regex_match(authority, match, v6Exp);
+    if (m_isV6 ||
+        boost::regex_match(authority, match, etherExp) ||
+        boost::regex_match(authority, match, v4HostExp)) {
+      m_host = match[1];
+      m_port = match[2];
+    }
+    else {
+      return false;
+    }
+  }
+
+  NFD_LOG_DEBUG("URI [" << uri << "] parsed into: " <<
+                m_scheme << ", " << m_host << ", " << m_port << ", " << m_path);
+  return true;
+}
+
+FaceUri::FaceUri(const boost::asio::ip::tcp::endpoint& endpoint)
+{
+  m_isV6 = endpoint.address().is_v6();
+  m_scheme = m_isV6 ? "tcp6" : "tcp4";
+  m_host = endpoint.address().to_string();
+  m_port = boost::lexical_cast<std::string>(endpoint.port());
+}
+
+FaceUri::FaceUri(const boost::asio::ip::udp::endpoint& endpoint)
+{
+  m_isV6 = endpoint.address().is_v6();
+  m_scheme = m_isV6 ? "udp6" : "udp4";
+  m_host = endpoint.address().to_string();
+  m_port = boost::lexical_cast<std::string>(endpoint.port());
+}
+
+#ifdef HAVE_UNIX_SOCKETS
+FaceUri::FaceUri(const boost::asio::local::stream_protocol::endpoint& endpoint)
+  : m_isV6(false)
+{
+  m_scheme = "unix";
+  m_path = endpoint.path();
+}
+#endif // HAVE_UNIX_SOCKETS
+
+FaceUri
+FaceUri::fromFd(int fd)
+{
+  FaceUri uri;
+  uri.m_scheme = "fd";
+  uri.m_host = boost::lexical_cast<std::string>(fd);
+  return uri;
+}
+
+#ifdef HAVE_LIBPCAP
+FaceUri::FaceUri(const ethernet::Address& address)
+  : m_isV6(false)
+{
+  m_scheme = "ether";
+  m_host = address.toString();
+}
+#endif // HAVE_LIBPCAP
+
+FaceUri
+FaceUri::fromDev(const std::string& ifname)
+{
+  FaceUri uri;
+  uri.m_scheme = "dev";
+  uri.m_host = ifname;
+  return uri;
+}
+
+} // namespace nfd