1 /*
2  * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef STREAM_SERVER_H
17 #define STREAM_SERVER_H
18 
19 #include <functional>
20 #include <list>
21 #include <map>
22 #include <mutex>
23 
24 #include "nocopyable.h"
25 
26 #include "circle_stream_buffer.h"
27 #include "i_stream_server.h"
28 #include "stream_socket.h"
29 
30 namespace OHOS {
31 namespace Msdp {
32 namespace DeviceStatus {
33 enum EpollEventType {
34     EPOLL_EVENT_BEGIN = 0,
35     EPOLL_EVENT_INPUT = EPOLL_EVENT_BEGIN,
36     EPOLL_EVENT_SOCKET,
37     EPOLL_EVENT_ETASK,
38     EPOLL_EVENT_TIMER,
39     EPOLL_EVENT_DEVICE_MGR,
40     EPOLL_EVENT_END
41 };
42 
43 using MsgServerFunCallback = std::function<void(SessionPtr, NetPacket&)>;
44 class StreamServer : public StreamSocket, public IStreamServer {
45 public:
46     StreamServer() = default;
47     DISALLOW_COPY_AND_MOVE(StreamServer);
48     virtual ~StreamServer();
49     void UdsStop();
50     bool SendMsg(int32_t fd, NetPacket &pkt);
51     void Multicast(const std::vector<int32_t> &fdList, NetPacket &pkt);
52     int32_t GetClientFd(int32_t pid) const;
53     int32_t GetClientPid(int32_t fd) const;
54     void AddSessionDeletedCallback(int32_t pid, std::function<void(SessionPtr)> callback);
55     int32_t AddSocketPairInfo(const std::string &programName, int32_t moduleType, int32_t uid, int32_t pid,
56         int32_t &serverFd, int32_t &toReturnClientFd, int32_t &tokenType) override;
57 
58     SessionPtr GetSession(int32_t fd) const;
59     SessionPtr GetSessionByPid(int32_t pid) const override;
60 
61 private:
62     int32_t SetSockOpt(int32_t &serverFd, int32_t &toReturnClientFd, int32_t &tokenType);
63     int32_t CloseFd(int32_t &serverFd, int32_t &toReturnClientFd);
64 
65 protected:
66     virtual void OnConnected(SessionPtr s) = 0;
67     virtual void OnDisconnected(SessionPtr s) = 0;
68     virtual int32_t AddEpoll(EpollEventType type, int32_t fd) = 0;
69 
70     void SetRecvFun(MsgServerFunCallback fun);
71     void ReleaseSession(int32_t fd, epoll_event &ev);
72     void OnPacket(int32_t fd, NetPacket &pkt);
73     void OnEpollRecv(int32_t fd, epoll_event &ev);
74     void OnEpollEvent(epoll_event &ev);
75     bool AddSession(SessionPtr ses);
76     void DelSession(int32_t fd);
77     void DumpSession(const std::string &title);
78     void NotifySessionDeleted(SessionPtr ses);
79 
80 protected:
81     MsgServerFunCallback recvFun_ { nullptr };
82     std::map<int32_t, SessionPtr> sessionss_;
83     std::map<int32_t, int32_t> idxPids_;
84     std::map<int32_t, CircleStreamBuffer> circleBufs_;
85     std::map<int32_t, std::function<void(SessionPtr)>> callbacks_;
86 };
87 } // namespace DeviceStatus
88 } // namespace Msdp
89 } // namespace OHOS
90 #endif // STREAM_SERVER_H