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1 /*
2  * Copyright 2012, The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef A_NETWORK_SESSION_H_
18 
19 #define A_NETWORK_SESSION_H_
20 
21 #include <media/stagefright/foundation/ABase.h>
22 #include <utils/KeyedVector.h>
23 #include <utils/RefBase.h>
24 #include <utils/Thread.h>
25 
26 #include <netinet/in.h>
27 
28 namespace android {
29 
30 struct AMessage;
31 
32 // Helper class to manage a number of live sockets (datagram and stream-based)
33 // on a single thread. Clients are notified about activity through AMessages.
34 struct ANetworkSession : public RefBase {
35     ANetworkSession();
36 
37     status_t start();
38     status_t stop();
39 
40     status_t createRTSPClient(
41             const char *host, unsigned port, const sp<AMessage> &notify,
42             int32_t *sessionID);
43 
44     status_t createRTSPServer(
45             const struct in_addr &addr, unsigned port,
46             const sp<AMessage> &notify, int32_t *sessionID);
47 
48     status_t createUDPSession(
49             unsigned localPort, const sp<AMessage> &notify, int32_t *sessionID);
50 
51     status_t createUDPSession(
52             unsigned localPort,
53             const char *remoteHost,
54             unsigned remotePort,
55             const sp<AMessage> &notify,
56             int32_t *sessionID);
57 
58     status_t connectUDPSession(
59             int32_t sessionID, const char *remoteHost, unsigned remotePort);
60 
61     // passive
62     status_t createTCPDatagramSession(
63             const struct in_addr &addr, unsigned port,
64             const sp<AMessage> &notify, int32_t *sessionID);
65 
66     // active
67     status_t createTCPDatagramSession(
68             unsigned localPort,
69             const char *remoteHost,
70             unsigned remotePort,
71             const sp<AMessage> &notify,
72             int32_t *sessionID);
73 
74     status_t destroySession(int32_t sessionID);
75 
76     status_t sendRequest(
77             int32_t sessionID, const void *data, ssize_t size = -1,
78             bool timeValid = false, int64_t timeUs = -1ll);
79 
80     status_t switchToWebSocketMode(int32_t sessionID);
81 
82     enum NotificationReason {
83         kWhatError,
84         kWhatConnected,
85         kWhatClientConnected,
86         kWhatData,
87         kWhatDatagram,
88         kWhatBinaryData,
89         kWhatWebSocketMessage,
90         kWhatNetworkStall,
91     };
92 
93 protected:
94     virtual ~ANetworkSession();
95 
96 private:
97     struct NetworkThread;
98     struct Session;
99 
100     Mutex mLock;
101     sp<Thread> mThread;
102 
103     int32_t mNextSessionID;
104 
105     int mPipeFd[2];
106 
107     KeyedVector<int32_t, sp<Session> > mSessions;
108 
109     enum Mode {
110         kModeCreateUDPSession,
111         kModeCreateTCPDatagramSessionPassive,
112         kModeCreateTCPDatagramSessionActive,
113         kModeCreateRTSPServer,
114         kModeCreateRTSPClient,
115     };
116     status_t createClientOrServer(
117             Mode mode,
118             const struct in_addr *addr,
119             unsigned port,
120             const char *remoteHost,
121             unsigned remotePort,
122             const sp<AMessage> &notify,
123             int32_t *sessionID);
124 
125     void threadLoop();
126     void interrupt();
127 
128     static status_t MakeSocketNonBlocking(int s);
129 
130     DISALLOW_EVIL_CONSTRUCTORS(ANetworkSession);
131 };
132 
133 }  // namespace android
134 
135 #endif  // A_NETWORK_SESSION_H_
136