text: //
  //  OpenVPNClient.h
  //  OpenVPN Adapter
  //
  //  Created by Sergey Abramchuk on 11.01.2018.
  //
  
  #import <Foundation/Foundation.h>
  
  #include <ovpnapi.hpp>
  
  @class NEIPv4Route;
  @class NEIPv6Route;
  @class NEProxyServer;
  
  typedef NS_ENUM(NSInteger, OpenVPNProxyServerProtocol) {
      OpenVPNProxyServerProtocolHTTP,
      OpenVPNProxyServerProtocolHTTPS
  };
  
  NS_ASSUME_NONNULL_BEGIN
  
  @protocol OpenVPNClientDelegate <NSObject>
  - (BOOL)setRemoteAddress:(NSString *)address;
  
  - (BOOL)addIPV4Address:(NSString *)address subnetMask:(NSString *)subnetMask gateway:(nullable NSString *)gateway;
  - (BOOL)addIPV6Address:(NSString *)address prefixLength:(NSNumber *)prefixLength gateway:(nullable NSString *)gateway;
  
  - (BOOL)addIPV4Route:(NEIPv4Route *)route;
  - (BOOL)addIPV6Route:(NEIPv6Route *)route;
  - (BOOL)excludeIPV4Route:(NEIPv4Route *)route;
  - (BOOL)excludeIPV6Route:(NEIPv6Route *)route;
  
  - (BOOL)addDNS:(NSString *)dns;
  - (BOOL)addSearchDomain:(NSString *)domain;
  
  - (BOOL)setMTU:(NSNumber *)mtu;
  - (BOOL)setSessionName:(NSString *)name;
  
  - (BOOL)addProxyBypassHost:(NSString *)bypassHost;
  - (BOOL)setProxyAutoConfigurationURL:(NSURL *)url;
  - (BOOL)setProxyServer:(NEProxyServer *)server protocol:(OpenVPNProxyServerProtocol)protocol;
  
  - (BOOL)establishTunnel;
  - (CFSocketNativeHandle)socketHandle;
  
  - (void)clientEventName:(NSString *)eventName message:(nullable NSString *)message;
  - (void)clientErrorName:(NSString *)errorName fatal:(BOOL)fatal message:(nullable NSString *)message;
  - (void)clientLogMessage:(NSString *)logMessage;
  
  - (void)tick;
  
  - (void)resetSettings;
  - (void)resetTun;
  @end
  
  NS_ASSUME_NONNULL_END
  
  using namespace openvpn;
  
  class OpenVPNClient : public ClientAPI::OpenVPNClient {
  public:
      OpenVPNClient(id<OpenVPNClientDelegate> _Nonnull delegate);
      ~OpenVPNClient();
      
      ClientAPI::EvalConfig apply_config(const ClientAPI::Config& config);
      
      bool tun_builder_new() override;
      
      bool tun_builder_set_remote_address(const std::string& address, bool ipv6) override;
      bool tun_builder_add_address(const std::string& address, int prefix_length, const std::string& gateway,
                                   bool ipv6, bool net30) override;
      bool tun_builder_reroute_gw(bool ipv4, bool ipv6, unsigned int flags) override;
      bool tun_builder_add_route(const std::string& address, int prefix_length, int metric, bool ipv6) override;
      bool tun_builder_exclude_route(const std::string& address, int prefix_length, int metric, bool ipv6) override;
      bool tun_builder_add_dns_server(const std::string& address, bool ipv6) override;
      bool tun_builder_add_search_domain(const std::string& domain) override;
      bool tun_builder_set_mtu(int mtu) override;
      bool tun_builder_set_session_name(const std::string& name) override;
      bool tun_builder_add_proxy_bypass(const std::string& bypass_host) override;
      bool tun_builder_set_proxy_auto_config_url(const std::string& urlString) override;
      bool tun_builder_set_proxy_http(const std::string& host, int port) override;
      bool tun_builder_set_proxy_https(const std::string& host, int port) override;
      bool tun_builder_set_block_ipv6(bool block_ipv6) override;
      
      int tun_builder_establish() override;
      bool tun_builder_persist() override;
      void tun_builder_teardown(bool disconnect) override;
      
      bool socket_protect(int socket, std::string remote, bool ipv6) override;
      bool pause_on_connection_timeout() override;
      
      void external_pki_cert_request(ClientAPI::ExternalPKICertRequest& certreq) override;
      void external_pki_sign_request(ClientAPI::ExternalPKISignRequest& signreq) override;
      
      void event(const ClientAPI::Event& event) override;
      void log(const ClientAPI::LogInfo& log) override;
      
      void clock_tick() override;
      
  private:
      __weak id<OpenVPNClientDelegate> _Nonnull delegate;
      ClientAPI::Config * _Nullable config;
  };
  
  
  