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1 // Copyright 2015 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef BLIMP_NET_CLIENT_CONNECTION_MANAGER_H_ | |
6 #define BLIMP_NET_CLIENT_CONNECTION_MANAGER_H_ | |
7 | |
8 #include <memory> | |
9 #include <string> | |
10 #include <vector> | |
11 | |
12 #include "base/macros.h" | |
13 #include "base/memory/weak_ptr.h" | |
14 #include "blimp/net/blimp_net_export.h" | |
15 #include "blimp/net/connection_error_observer.h" | |
16 | |
17 namespace blimp { | |
18 | |
19 class BlimpConnection; | |
20 class BlimpTransport; | |
21 class ConnectionHandler; | |
22 | |
23 // Coordinates the channel creation and authentication workflows for | |
24 // outgoing (Client) network connections. | |
25 // | |
26 // TODO(haibinlu): cope with network changes that may potentially affect the | |
27 // endpoint that we're trying to connect to. | |
28 class BLIMP_NET_EXPORT ClientConnectionManager | |
29 : public ConnectionErrorObserver { | |
30 public: | |
31 // Caller is responsible for ensuring that |connection_handler| | |
32 // outlives |this|. | |
33 explicit ClientConnectionManager(ConnectionHandler* connection_handler); | |
34 | |
35 ~ClientConnectionManager() override; | |
36 | |
37 // Adds a transport. All transports are expected to be added before invoking | |
38 // |Connect|. | |
39 void AddTransport(std::unique_ptr<BlimpTransport> transport); | |
40 | |
41 // Attempts to create a connection using any of the BlimpTransports in | |
42 // |transports_|. | |
43 // This will result in the handler being called back at-most-once. | |
44 // | |
45 // This is also a placeholder for automatic reconnection logic for common | |
46 // cases such as network switches, online/offline changes. | |
47 void Connect(); | |
48 | |
49 // Sets the client auth token to use in the authentication message. | |
50 void set_client_auth_token(const std::string& client_auth_token) { | |
51 client_auth_token_ = client_auth_token; | |
52 } | |
53 | |
54 private: | |
55 // Tries to connect using the BlimpTransport specified at |transport_index|. | |
56 void Connect(int transport_index); | |
57 | |
58 // Callback invoked by transports_[transport_index] to indicate that it has a | |
59 // connection ready to be authenticated or there is an error. | |
60 void OnConnectResult(int transport_index, int result); | |
61 | |
62 // Sends authentication message to the engine via |connection|. | |
63 void SendAuthenticationMessage(std::unique_ptr<BlimpConnection> connection); | |
64 | |
65 // Invoked after the authentication message is sent to |connection|. | |
66 // The result of the write operation is passed via |result|. | |
67 void OnAuthenticationMessageSent(std::unique_ptr<BlimpConnection> connection, | |
68 int result); | |
69 | |
70 // ConnectionErrorObserver implementation. | |
71 void OnConnectionError(int error) override; | |
72 | |
73 std::string client_auth_token_; | |
74 ConnectionHandler* connection_handler_; | |
75 std::vector<std::unique_ptr<BlimpTransport>> transports_; | |
76 base::WeakPtrFactory<ClientConnectionManager> weak_factory_; | |
77 | |
78 DISALLOW_COPY_AND_ASSIGN(ClientConnectionManager); | |
79 }; | |
80 | |
81 } // namespace blimp | |
82 | |
83 #endif // BLIMP_NET_CLIENT_CONNECTION_MANAGER_H_ | |
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