Added socks proxy (tor/i2pd/kovri) support to wallet

src/net/socks_connect.cpp

@@ -0,0 +1,90 @@
+// Copyright (c) 2019, 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 "socks_connect.h"
+
+#include <boost/system/error_code.hpp>
+#include <boost/system/system_error.hpp>
+#include <cstdint>
+#include <memory>
+#include <system_error>
+
+#include "net/error.h"
+#include "net/net_utils_base.h"
+#include "net/socks.h"
+#include "string_tools.h"
+
+namespace net
+{
+namespace socks
+{
+    boost::unique_future<boost::asio::ip::tcp::socket>
+    connector::operator()(const std::string& remote_host, const std::string& remote_port, boost::asio::steady_timer& timeout) const
+    {
+        struct future_socket
+        {
+            boost::promise<boost::asio::ip::tcp::socket> result_;
+
+            void operator()(boost::system::error_code error, boost::asio::ip::tcp::socket&& socket)
+            {
+                if (error)
+                    result_.set_exception(boost::system::system_error{error});
+                else
+                    result_.set_value(std::move(socket));
+            }
+        };
+
+        boost::unique_future<boost::asio::ip::tcp::socket> out{};
+        {
+            std::uint16_t port = 0;
+            if (!epee::string_tools::get_xtype_from_string(port, remote_port))
+                throw std::system_error{net::error::invalid_port, "Remote port for socks proxy"};
+
+            bool is_set = false;
+            std::uint32_t ip_address = 0;
+            boost::promise<boost::asio::ip::tcp::socket> result{};
+            out = result.get_future();
+            const auto proxy = net::socks::make_connect_client(
+                boost::asio::ip::tcp::socket{GET_IO_SERVICE(timeout)}, net::socks::version::v4a, future_socket{std::move(result)}
+            );
+
+            if (epee::string_tools::get_ip_int32_from_string(ip_address, remote_host))
+                is_set = proxy->set_connect_command(epee::net_utils::ipv4_network_address{ip_address, port});
+            else
+                is_set = proxy->set_connect_command(remote_host, port);
+
+            if (!is_set || !net::socks::client::connect_and_send(proxy, proxy_address))
+                throw std::system_error{net::error::invalid_host, "Address for socks proxy"};
+
+            timeout.async_wait(net::socks::client::async_close{std::move(proxy)});
+        }
+
+        return out;
+    }
+} // socks
+} // net