First step of the connection skeleton

Basic connect, socket creating, polling, recving, etc.

src/network/socket_handler.hpp

@@ -0,0 +1,62 @@
+#ifndef SOCKET_HANDLER_INCLUDED
+# define SOCKET_HANDLER_INCLUDED
+
+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
+{
+public:
+  explicit SocketHandler():
+    poller(nullptr)
+  {}
+  /**
+   * Set the pointer to the given Poller, to communicate with it.
+   */
+  void set_poller(Poller* poller)
+  {
+    this->poller = poller;
+  };
+  /**
+   * Happens when the socket is ready to be received from.
+   */
+  virtual void on_recv() = 0;
+  /**
+   * Happens when the socket is ready to be written to.
+   */
+  virtual void on_send() = 0;
+  /**
+   * Returns the socket that should be handled by the poller.
+   */
+  virtual socket_t get_socket() const = 0;
+  /**
+   * Close the connection.
+   */
+  virtual void close() = 0;
+
+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).
+   */
+  Poller* poller;
+
+private:
+  SocketHandler(const SocketHandler&) = delete;
+  SocketHandler(SocketHandler&&) = delete;
+  SocketHandler& operator=(const SocketHandler&) = delete;
+  SocketHandler& operator=(SocketHandler&&) = delete;
+};
+
+#endif // SOCKET_HANDLER_INCLUDED