Move CastSocket components to public/ dirs

This change moves CastSocket and both factories to their respective
public directories to make embedder DEPS whitelisting clearer.

Bug: b/154090565
Change-Id: Ieee5ed5bf794e26683dd0ea58c97c6299c1579af
Reviewed-on: https://chromium-review.googlesource.com/c/openscreen/+/2161147
Reviewed-by: Ryan Keane <rwkeane@google.com>
Commit-Queue: Brandon Tolsch <btolsch@chromium.org>

1 files changed, 110 insertions, 0 deletions

diff --git a/cast/sender/public/sender_socket_factory.h b/cast/sender/public/sender_socket_factory.h
new file mode 100644
index 00000000..67d8c901
--- /dev/null
+++ b/cast/sender/public/sender_socket_factory.h
@@ -0,0 +1,110 @@
+// Copyright 2019 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CAST_SENDER_PUBLIC_SENDER_SOCKET_FACTORY_H_
+#define CAST_SENDER_PUBLIC_SENDER_SOCKET_FACTORY_H_
+
+#include <openssl/x509.h>
+
+#include <set>
+#include <utility>
+#include <vector>
+
+#include "cast/common/public/cast_socket.h"
+#include "platform/api/task_runner.h"
+#include "platform/api/tls_connection_factory.h"
+#include "platform/base/ip_address.h"
+#include "util/serial_delete_ptr.h"
+
+namespace openscreen {
+namespace cast {
+
+class AuthContext;
+
+class SenderSocketFactory final : public TlsConnectionFactory::Client,
+                                  public CastSocket::Client {
+ public:
+  class Client {
+   public:
+    virtual void OnConnected(SenderSocketFactory* factory,
+                             const IPEndpoint& endpoint,
+                             std::unique_ptr<CastSocket> socket) = 0;
+    virtual void OnError(SenderSocketFactory* factory,
+                         const IPEndpoint& endpoint,
+                         Error error) = 0;
+  };
+
+  enum class DeviceMediaPolicy {
+    kNone = 0,
+    kAudioOnly,
+    kIncludesVideo,
+  };
+
+  // |client| and |task_runner| must outlive |this|.
+  SenderSocketFactory(Client* client, TaskRunner* task_runner);
+  ~SenderSocketFactory();
+
+  // |factory| cannot be nullptr and must outlive |this|.
+  void set_factory(TlsConnectionFactory* factory);
+
+  // Begins connecting to a Cast device at |endpoint|.  If a successful
+  // connection is made, including device authentication, the new CastSocket
+  // will be passed to |client_|'s OnConnected method.  The new CastSocket will
+  // have its client set to |client|.  If any part of the connection process
+  // fails, |client_|'s OnError method is called instead.  This includes if the
+  // device's media policy, as determined by authentication, is audio-only and
+  // |media_policy| is kIncludesVideo.
+  void Connect(const IPEndpoint& endpoint,
+               DeviceMediaPolicy media_policy,
+               CastSocket::Client* client);
+
+  // TlsConnectionFactory::Client overrides.
+  void OnAccepted(TlsConnectionFactory* factory,
+                  std::vector<uint8_t> der_x509_peer_cert,
+                  std::unique_ptr<TlsConnection> connection) override;
+  void OnConnected(TlsConnectionFactory* factory,
+                   std::vector<uint8_t> der_x509_peer_cert,
+                   std::unique_ptr<TlsConnection> connection) override;
+  void OnConnectionFailed(TlsConnectionFactory* factory,
+                          const IPEndpoint& remote_address) override;
+  void OnError(TlsConnectionFactory* factory, Error error) override;
+
+ private:
+  struct PendingConnection {
+    IPEndpoint endpoint;
+    DeviceMediaPolicy media_policy;
+    CastSocket::Client* client;
+  };
+
+  struct PendingAuth {
+    IPEndpoint endpoint;
+    DeviceMediaPolicy media_policy;
+    SerialDeletePtr<CastSocket> socket;
+    CastSocket::Client* client;
+    std::unique_ptr<AuthContext> auth_context;
+    bssl::UniquePtr<X509> peer_cert;
+  };
+
+  friend bool operator<(const std::unique_ptr<PendingAuth>& a, int b);
+  friend bool operator<(int a, const std::unique_ptr<PendingAuth>& b);
+
+  std::vector<PendingConnection>::iterator FindPendingConnection(
+      const IPEndpoint& endpoint);
+
+  // CastSocket::Client overrides.
+  void OnError(CastSocket* socket, Error error) override;
+  void OnMessage(CastSocket* socket,
+                 ::cast::channel::CastMessage message) override;
+
+  Client* const client_;
+  TaskRunner* const task_runner_;
+  TlsConnectionFactory* factory_ = nullptr;
+  std::vector<PendingConnection> pending_connections_;
+  std::vector<std::unique_ptr<PendingAuth>> pending_auth_;
+};
+
+}  // namespace cast
+}  // namespace openscreen
+
+#endif  // CAST_SENDER_PUBLIC_SENDER_SOCKET_FACTORY_H_