1 files changed, 18 insertions, 255 deletions

diff --git a/src/network/socket_handler.hpp b/src/network/socket_handler.hpp
index 061658e..9a894a4 100644
--- a/src/network/socket_handler.hpp
+++ b/src/network/socket_handler.hpp
@@ -1,280 +1,43 @@
-#ifndef SOCKET_HANDLER_INCLUDED
-# define SOCKET_HANDLER_INCLUDED
+#ifndef SOCKET_HANDLER_HPP
+# define SOCKET_HANDLER_HPP
 
-#include <logger/logger.hpp>
-
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netdb.h>
-
-#include <utility>
 #include <memory>
-#include <string>
-#include <list>
-
-#include "config.h"
 
-#ifdef BOTAN_FOUND
-# include <botan/botan.h>
-# include <botan/tls_client.h>
-
-/**
- * A very simple credential manager that accepts any certificate.
- */
-class Permissive_Credentials_Manager: public Botan::Credentials_Manager
-{
-public:
-  void verify_certificate_chain(const std::string& type, const std::string& purported_hostname, const std::vector<Botan::X509_Certificate>&)
-  { // TODO: Offer the admin to disallow connection on untrusted
-    // certificates
-    log_debug("Checking remote certificate (" << type << ") for hostname " << purported_hostname);
-  }
-};
-#endif // BOTAN_FOUND
+class Poller;
 
 typedef int socket_t;
 
-class Poller;
-
-/**
- * An interface, with a series of callbacks that should be implemented in
- * subclasses that deal with a socket. These callbacks are called on various events
- * (read/write/timeout, etc) when they are notified to a poller
- * (select/poll/epoll etc)
- */
 class SocketHandler
 {
-protected:
-  ~SocketHandler() {}
-
 public:
-  explicit SocketHandler(std::shared_ptr<Poller> poller);
-  /**
-   * Connect to the remote server, and call on_connected() if this
-   * succeeds. If tls is true, we set use_tls to true and will also call
-   * start_tls() when the connection succeeds.
-   */
-  void connect(const std::string& address, const std::string& port, const bool tls);
-  void connect();
-  /**
-   * Reads raw data from the socket. And pass it to parse_in_buffer()
-   * If we are using TLS on this connection, we call tls_recv()
-   */
-  void on_recv();
-  /**
-   * Write as much data from out_buf as possible, in the socket.
-   */
-  void on_send();
-  /**
-   * Add the given data to out_buf and tell our poller that we want to be
-   * notified when a send event is ready.
-   *
-   * This can be overriden if we want to modify the data before sending
-   * it. For example if we want to encrypt it.
-   */
-  void send_data(std::string&& data);
-  /**
-   * Watch the socket for send events, if our out buffer is not empty.
-   */
-  void send_pending_data();
-  /**
-   * Returns the socket that should be handled by the poller.
-   */
-  socket_t get_socket() const;
-  /**
-   * Close the connection, remove us from the poller
-   */
-  void close();
-  /**
-   * Called by a TimedEvent, when the connection did not succeed or fail
-   * after a given time.
-   */
-  void on_connection_timeout();
-  /**
-   * Called when the connection is successful.
-   */
-  virtual void on_connected() = 0;
-  /**
-   * Called when the connection fails. Not when it is closed later, just at
-   * the connect() call.
-   */
-  virtual void on_connection_failed(const std::string& reason) = 0;
-  /**
-   * Called when we detect a disconnection from the remote host.
-   */
-  virtual void on_connection_close() = 0;
-  /**
-   * Handle/consume (some of) the data received so far.  The data to handle
-   * may be in the in_buf buffer, or somewhere else, depending on what
-   * get_receive_buffer() returned.  If some data is used from in_buf, it
-   * should be truncated, only the unused data should be left untouched.
-   *
-   * The size argument is the size of the last chunk of data that was added to the buffer.
-   */
-  virtual void parse_in_buffer(const size_t size) = 0;
-  bool is_connected() const;
-  bool is_connecting() const;
-
-private:
-  /**
-   * Initialize the socket with the parameters contained in the given
-   * addrinfo structure.
-   */
-  void init_socket(const struct addrinfo* rp);
-  /**
-   * Reads from the socket into the provided buffer.  If an error occurs
-   * (read returns <= 0), the handling of the error is done here (close the
-   * connection, log a message, etc).
-   *
-   * Returns the value returned by ::recv(), so the buffer should not be
-   * used if it’s not positive.
-   */
-  ssize_t do_recv(void* recv_buf, const size_t buf_size);
-  /**
-   * Reads data from the socket and calls parse_in_buffer with it.
-   */
-  void plain_recv();
-  /**
-   * Mark the given data as ready to be sent, as-is, on the socket, as soon
-   * as we can.
-   */
-  void raw_send(std::string&& data);
-
-#ifdef BOTAN_FOUND
-  /**
-   * Create the TLS::Client object, with all the callbacks etc. This must be
-   * called only when we know we are able to send TLS-encrypted data over
-   * the socket.
-   */
-  void start_tls();
-  /**
-   * An additional step to pass the data into our tls object to decrypt it
-   * before passing it to parse_in_buffer.
-   */
-  void tls_recv();
-  /**
-   * Pass the data to the tls object in order to encrypt it. The tls object
-   * will then call raw_send as a callback whenever data as been encrypted
-   * and can be sent on the socket.
-   */
-  void tls_send(std::string&& data);
-  /**
-   * Called by the tls object that some data has been decrypt. We call
-   * parse_in_buffer() to handle that unencrypted data.
-   */
-  void tls_data_cb(const Botan::byte* data, size_t size);
-  /**
-   * Called by the tls object to indicate that some data has been encrypted
-   * and is now ready to be sent on the socket as is.
-   */
-  void tls_output_fn(const Botan::byte* data, size_t size);
-  /**
-   * Called by the tls object to indicate that a TLS alert has been
-   * received. We don’t use it, we just log some message, at the moment.
-   */
-  void tls_alert_cb(Botan::TLS::Alert alert, const Botan::byte*, size_t);
-  /**
-   * Called by the tls object at the end of the TLS handshake. We don't do
-   * anything here appart from logging the TLS session information.
-   */
-  bool tls_handshake_cb(const Botan::TLS::Session& session);
-  /**
-   * Called whenever the tls session goes from inactive to active. This
-   * means that the handshake has just been successfully done, and we can
-   * now proceed to send any available data into our tls object.
-   */
-  void on_tls_activated();
-#endif // BOTAN_FOUND
-  /**
-   * The handled socket.
-   */
-  socket_t socket;
-  /**
-   * Where data is added, when we want to send something to the client.
-   */
-  std::list<std::string> out_buf;
-  /**
-   * Keep the details of the addrinfo the triggered a EINPROGRESS error when
-   * connect()ing to it, to reuse it directly when connect() is called
-   * again.
-   */
-  struct addrinfo addrinfo;
-  struct sockaddr_in6 ai_addr;
-  socklen_t ai_addrlen;
+  explicit SocketHandler(std::shared_ptr<Poller> poller, const socket_t socket):
+    poller(poller),
+    socket(socket)
+  {}
+  virtual ~SocketHandler() {}
+  virtual void on_recv() = 0;
+  virtual void on_send() = 0;
+  virtual void connect() = 0;
+  virtual bool is_connected() const = 0;
+  socket_t get_socket() const
+  { return this->socket; }
 
 protected:
   /**
    * A pointer to the poller that manages us, because we need to communicate
-   * with it, sometimes (for example to tell it that he now needs to watch
-   * write events for us). Do not ever try to delete it.
-   *
-   * And a raw pointer because we are not owning it, it is owning us
-   * (actually it is sharing our ownership with a Bridge).
+   * with it.
    */
   std::shared_ptr<Poller> poller;
   /**
-   * Where data read from the socket is added until we can extract a full
-   * and meaningful “message” from it.
-   *
-   * TODO: something more efficient than a string.
-   */
-  std::string in_buf;
-  /**
-   * Whether we are using TLS on this connection or not.
-   */
-  bool use_tls;
-  /**
-   * Provide a buffer in which data can be directly received. This can be
-   * used to avoid copying data into in_buf before using it. If no buffer
-   * needs to be provided, nullptr is returned (the default implementation
-   * does that), in that case our internal in_buf will be used to save the
-   * data until it can be used by parse_in_buffer().
-   */
-  virtual void* get_receive_buffer(const size_t size) const;
-  /**
-   * Hostname we are connected/connecting to
-   */
-  std::string address;
-  /**
-   * Port we are connected/connecting to
+   * The handled socket.
    */
-  std::string port;
-
-  bool connected;
-  bool connecting;
+  socket_t socket;
 
 private:
   SocketHandler(const SocketHandler&) = delete;
   SocketHandler(SocketHandler&&) = delete;
   SocketHandler& operator=(const SocketHandler&) = delete;
   SocketHandler& operator=(SocketHandler&&) = delete;
-
-#ifdef BOTAN_FOUND
-  /**
-   * Botan stuff to manipulate a TLS session.
-   */
-  static Botan::AutoSeeded_RNG rng;
-  static Permissive_Credentials_Manager credential_manager;
-  static Botan::TLS::Policy policy;
-  static Botan::TLS::Session_Manager_In_Memory session_manager;
-  /**
-   * We use a unique_ptr because we may not want to create the object at
-   * all. The Botan::TLS::Client object generates a handshake message as
-   * soon and calls the output_fn callback with it as soon as it is
-   * created. Therefore, we do not want to create it if do not intend to do
-   * send any TLS-encrypted message. We create the object only when needed
-   * (for example after we have negociated a TLS session using a STARTTLS
-   * message, or stuf like that).
-   *
-   * See start_tls for the method where this object is created.
-   */
-  std::unique_ptr<Botan::TLS::Client> tls;
-  /**
-   * An additional buffer to keep data that the user wants to send, but
-   * cannot because the handshake is not done.
-   */
-  std::string pre_buf;
-#endif // BOTAN_FOUND
 };
 
-#endif // SOCKET_HANDLER_INCLUDED
+#endif // SOCKET_HANDLER_HPP