Adding initial support for broadcasting transactions over Tor

- Support for ".onion" in --add-exclusive-node and --add-peer
  - Add --anonymizing-proxy for outbound Tor connections
  - Add --anonymous-inbounds for inbound Tor connections
  - Support for sharing ".onion" addresses over Tor connections
  - Support for broadcasting transactions received over RPC exclusively
    over Tor (else broadcast over public IP when Tor not enabled).

contrib/epee/src/connection_basic.cpp

@@ -103,7 +103,7 @@ namespace net_utils
 // connection_basic_pimpl
 // ================================================================================================
 	
-connection_basic_pimpl::connection_basic_pimpl(const std::string &name) : m_throttle(name) { }
+connection_basic_pimpl::connection_basic_pimpl(const std::string &name) : m_throttle(name), m_peer_number(0) { }
 
 // ================================================================================================
 // connection_basic
@@ -113,27 +113,31 @@ connection_basic_pimpl::connection_basic_pimpl(const std::string &name) : m_thro
 int connection_basic_pimpl::m_default_tos;
 
 // methods:
-connection_basic::connection_basic(boost::asio::io_service& io_service, std::atomic<long> &ref_sock_count, std::atomic<long> &sock_number)
-	: 
+connection_basic::connection_basic(boost::asio::ip::tcp::socket&& socket, boost::shared_ptr<socket_stats> stats)
+	:
+	m_stats(std::move(stats)),
 	mI( new connection_basic_pimpl("peer") ),
-	strand_(io_service),
-	socket_(io_service),
+	strand_(socket.get_io_service()),
+	socket_(std::move(socket)),
 	m_want_close_connection(false), 
-	m_was_shutdown(false),
-	m_ref_sock_count(ref_sock_count)
-{ 
-	++ref_sock_count; // increase the global counter
-	mI->m_peer_number = sock_number.fetch_add(1); // use, and increase the generated number
+	m_was_shutdown(false)
+{
+	// add nullptr checks if removed
+	CHECK_AND_ASSERT_THROW_MES(bool(m_stats), "stats shared_ptr cannot be null");
+
+	++(m_stats->sock_count); // increase the global counter
+	mI->m_peer_number = m_stats->sock_number.fetch_add(1); // use, and increase the generated number
 
 	std::string remote_addr_str = "?";
 	try { boost::system::error_code e; remote_addr_str = socket_.remote_endpoint(e).address().to_string(); } catch(...){} ;
 
-	_note("Spawned connection p2p#"<<mI->m_peer_number<<" to " << remote_addr_str << " currently we have sockets count:" << m_ref_sock_count);
+	_note("Spawned connection p2p#"<<mI->m_peer_number<<" to " << remote_addr_str << " currently we have sockets count:" << m_stats->sock_count);
 }
 
 connection_basic::~connection_basic() noexcept(false) {
+	--(m_stats->sock_count);
+
 	std::string remote_addr_str = "?";
-	m_ref_sock_count--;
 	try { boost::system::error_code e; remote_addr_str = socket_.remote_endpoint(e).address().to_string(); } catch(...){} ;
 	_note("Destructing connection p2p#"<<mI->m_peer_number << " to " << remote_addr_str);
 }

contrib/epee/src/net_utils_base.cpp

@@ -8,8 +8,6 @@
 
 namespace epee { namespace net_utils
 {
-	const uint8_t ipv4_network_address::ID;
-
 	bool ipv4_network_address::equal(const ipv4_network_address& other) const noexcept
 	{ return is_same_host(other) && port() == other.port(); }
 
@@ -58,20 +56,6 @@ namespace epee { namespace net_utils
 		return self_->is_same_host(*other_self);
 	}
 
-	bool create_network_address(network_address &address, const std::string &string, uint16_t default_port)
-	{
-		uint32_t ip;
-		uint16_t port;
-		if (epee::string_tools::parse_peer_from_string(ip, port, string))
-		{
-			if (default_port && !port)
-				port = default_port;
-			address = ipv4_network_address{ip, port};
-			return true;
-		}
-		return false;
-	}
-
   std::string print_connection_context(const connection_context_base& ctx)
   {
     std::stringstream ss;
@@ -86,5 +70,31 @@ namespace epee { namespace net_utils
     return ss.str();
   }
 
+  const char* zone_to_string(zone value) noexcept
+  {
+    switch (value)
+    {
+    case zone::public_:
+      return "public";
+    case zone::i2p:
+      return "i2p";
+    case zone::tor:
+      return "tor";
+    default:
+      break;
+    }
+    return "invalid";
+  }
+
+  zone zone_from_string(const boost::string_ref value) noexcept
+  {
+    if (value == "public")
+      return zone::public_;
+    if (value == "i2p")
+      return zone::i2p;
+    if (value == "tor")
+      return zone::tor;
+    return zone::invalid;
+  }
 }}