1 files changed, 106 insertions, 0 deletions
diff --git a/src/crimson/net/SocketConnection.h b/src/crimson/net/SocketConnection.h
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+++ b/src/crimson/net/SocketConnection.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2017 Red Hat, Inc
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#pragma once
+
+#include <seastar/core/sharded.hh>
+
+#include "msg/Policy.h"
+#include "crimson/common/throttle.h"
+#include "crimson/net/Connection.h"
+#include "crimson/net/Socket.h"
+
+namespace crimson::net {
+
+class Protocol;
+class SocketMessenger;
+class SocketConnection;
+using SocketConnectionRef = seastar::shared_ptr<SocketConnection>;
+
+class SocketConnection : public Connection {
+  SocketMessenger& messenger;
+  std::unique_ptr<Protocol> protocol;
+
+  ceph::net::Policy<crimson::common::Throttle> policy;
+
+  /// the seq num of the last transmitted message
+  seq_num_t out_seq = 0;
+  /// the seq num of the last received message
+  seq_num_t in_seq = 0;
+  /// update the seq num of last received message
+  /// @returns true if the @c seq is valid, and @c in_seq is updated,
+  ///          false otherwise.
+  bool update_rx_seq(seq_num_t seq);
+
+  // messages to be resent after connection gets reset
+  std::deque<MessageRef> out_q;
+  std::deque<MessageRef> pending_q;
+  // messages sent, but not yet acked by peer
+  std::deque<MessageRef> sent;
+
+  seastar::shard_id shard_id() const;
+
+ public:
+  SocketConnection(SocketMessenger& messenger,
+                   ChainedDispatchers& dispatchers,
+                   bool is_msgr2);
+  ~SocketConnection() override;
+
+  Messenger* get_messenger() const override;
+
+  bool is_connected() const override;
+
+#ifdef UNIT_TESTS_BUILT
+  bool is_closed_clean() const override;
+
+  bool is_closed() const override;
+
+  bool peer_wins() const override;
+#else
+  bool peer_wins() const;
+#endif
+
+  seastar::future<> send(MessageRef msg) override;
+
+  seastar::future<> keepalive() override;
+
+  void mark_down() override;
+
+  void print(ostream& out) const override;
+
+  /// start a handshake from the client's perspective,
+  /// only call when SocketConnection first construct
+  void start_connect(const entity_addr_t& peer_addr,
+                     const entity_name_t& peer_name);
+  /// start a handshake from the server's perspective,
+  /// only call when SocketConnection first construct
+  void start_accept(SocketRef&& socket,
+                    const entity_addr_t& peer_addr);
+
+  seastar::future<> close_clean(bool dispatch_reset);
+
+  bool is_server_side() const {
+    return policy.server;
+  }
+
+  bool is_lossy() const {
+    return policy.lossy;
+  }
+
+  friend class Protocol;
+  friend class ProtocolV1;
+  friend class ProtocolV2;
+};
+
+} // namespace crimson::net