Support the ident protocol

fix #3211

src/identd/identd_server.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include <network/tcp_server_socket.hpp>
+#include <identd/identd_socket.hpp>
+#include <unistd.h>
+
+class BiboumiComponent;
+
+class IdentdServer: public TcpSocketServer<IdentdSocket>
+{
+ public:
+  IdentdServer(const BiboumiComponent& biboumi_component, std::shared_ptr<Poller> poller, const uint16_t port):
+      TcpSocketServer<IdentdSocket>(poller, port),
+      biboumi_component(biboumi_component)
+  {}
+
+  const BiboumiComponent& get_biboumi_component() const
+  {
+    return this->biboumi_component;
+  }
+  void shutdown()
+  {
+    if (this->poller->is_managing_socket(this->socket))
+      this->poller->remove_socket_handler(this->socket);
+    ::close(this->socket);
+  }
+  void clean()
+  {
+    this->sockets.erase(std::remove_if(this->sockets.begin(), this->sockets.end(),
+                                       [](const std::unique_ptr<IdentdSocket>& socket)
+                                       {
+                                         return socket->get_socket() == -1;
+                                       }),
+                        this->sockets.end());
+  }
+ private:
+  const BiboumiComponent& biboumi_component;
+};