text: // Copyright (c) 2014-2017, 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 "rpc_args.h"
  
  #include <boost/algorithm/string.hpp>
  #include <boost/asio/ip/address.hpp>
  #include "common/command_line.h"
  #include "common/i18n.h"
  
  namespace cryptonote
  {
    rpc_args::descriptors::descriptors()
       : rpc_bind_ip({"rpc-bind-ip", rpc_args::tr("Specify ip to bind rpc server"), "127.0.0.1"})
       , rpc_login({"rpc-login", rpc_args::tr("Specify username[:password] required for RPC server"), "", true})
       , confirm_external_bind({"confirm-external-bind", rpc_args::tr("Confirm rpc-bind-ip value is NOT a loopback (local) IP")})
       , rpc_access_control_origins({"rpc-access-control-origins", rpc_args::tr("Specify a comma separated list of origins to allow cross origin resource sharing"), ""})
    {}
  
    const char* rpc_args::tr(const char* str) { return i18n_translate(str, "cryptonote::rpc_args"); }
  
    void rpc_args::init_options(boost::program_options::options_description& desc)
    {
      const descriptors arg{};
      command_line::add_arg(desc, arg.rpc_bind_ip);
      command_line::add_arg(desc, arg.rpc_login);
      command_line::add_arg(desc, arg.confirm_external_bind);
      command_line::add_arg(desc, arg.rpc_access_control_origins);
    }
  
    boost::optional<rpc_args> rpc_args::process(const boost::program_options::variables_map& vm)
    {
      const descriptors arg{};
      rpc_args config{};
      
      config.bind_ip = command_line::get_arg(vm, arg.rpc_bind_ip);
      if (!config.bind_ip.empty())
      {
        // always parse IP here for error consistency
        boost::system::error_code ec{};
        const auto parsed_ip = boost::asio::ip::address::from_string(config.bind_ip, ec);
        if (ec)
        {
          LOG_ERROR(tr("Invalid IP address given for --") << arg.rpc_bind_ip.name);
          return boost::none;
        }
  
        if (!parsed_ip.is_loopback() && !command_line::get_arg(vm, arg.confirm_external_bind))
        {
          LOG_ERROR(
            "--" << arg.rpc_bind_ip.name <<
            tr(" permits inbound unencrypted external connections. Consider SSH tunnel or SSL proxy instead. Override with --") <<
            arg.confirm_external_bind.name
          );
          return boost::none;
        }
      }
  
      if (command_line::has_arg(vm, arg.rpc_login))
      {
        config.login = tools::login::parse(command_line::get_arg(vm, arg.rpc_login), true, "RPC server password");
        if (!config.login)
          return boost::none;
  
        if (config.login->username.empty())
        {
          LOG_ERROR(tr("Username specified with --") << arg.rpc_login.name << tr(" cannot be empty"));
          return boost::none;
        }
      }
  
      auto access_control_origins_input = command_line::get_arg(vm, arg.rpc_access_control_origins);
      if (!access_control_origins_input.empty())
      {
        if (!config.login)
        {
          LOG_ERROR(arg.rpc_access_control_origins.name  << tr(" requires RFC server password --") << arg.rpc_login.name << tr(" cannot be empty"));
          return boost::none;
        }
  
        std::vector<std::string> access_control_origins;
        boost::split(access_control_origins, access_control_origins_input, boost::is_any_of(","));
        std::for_each(access_control_origins.begin(), access_control_origins.end(), boost::bind(&boost::trim<std::string>, _1, std::locale::classic()));
        config.access_control_origins = std::move(access_control_origins);
      }
  
      return {std::move(config)};
    }
  }
  