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1 /*
2  * Copyright (c) 2021 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 #include "le_loop.h"
17 
18 #include <errno.h>
19 #include <sys/socket.h>
20 
21 #include "le_socket.h"
22 #include "le_task.h"
23 
HandleSendMsg_(const LoopHandle loopHandle,const TaskHandle taskHandle,const LE_SendMessageComplete complete)24 static LE_STATUS HandleSendMsg_(const LoopHandle loopHandle,
25     const TaskHandle taskHandle, const LE_SendMessageComplete complete)
26 {
27     EventLoop *loop = (EventLoop *)loopHandle;
28     StreamTask *stream = (StreamTask *)taskHandle;
29     LE_Buffer *buffer = GetFirstBuffer(stream);
30     while (buffer) {
31         int ret = write(GetSocketFd(taskHandle), buffer->data, buffer->dataSize);
32         LE_LOGV("HandleSendMsg_ fd:%d send data size %d %d", GetSocketFd(taskHandle), buffer->dataSize, ret);
33         buffer->result = (ret == (int)buffer->dataSize) ? 0 : errno;
34         if (complete != NULL) {
35             complete(taskHandle, buffer);
36         }
37         FreeBuffer(loopHandle, stream, buffer);
38         buffer = GetFirstBuffer(stream);
39     }
40     if (IsBufferEmpty(stream)) {
41         LE_LOGV("HandleSendMsg_ fd:%d empty wait read", GetSocketFd(taskHandle));
42         loop->modEvent(loop, (const BaseTask *)taskHandle, Event_Read);
43         return LE_SUCCESS;
44     }
45     return LE_SUCCESS;
46 }
47 
HandleRecvMsg_(const LoopHandle loopHandle,const TaskHandle taskHandle,const LE_RecvMessage recvMessage)48 static LE_STATUS HandleRecvMsg_(const LoopHandle loopHandle,
49     const TaskHandle taskHandle, const LE_RecvMessage recvMessage)
50 {
51     LE_STATUS status = LE_SUCCESS;
52     LE_Buffer *buffer = CreateBuffer(LOOP_DEFAULT_BUFFER);
53     int readLen = 0;
54     while (1) {
55         readLen = recv(GetSocketFd(taskHandle), buffer->data, LOOP_DEFAULT_BUFFER, 0);
56         LE_LOGV("HandleRecvMsg fd:%d read msg len %d", GetSocketFd(taskHandle), readLen);
57         if (readLen < 0) {
58             if (errno == EINTR || errno == EWOULDBLOCK || errno == EAGAIN) {
59                 continue;
60             }
61             status = LE_DIS_CONNECTED;
62             break;
63         } else if (readLen == 0) {
64             // 若另一端已关闭连接则返回0,这种关闭是对方主动且正常的关闭
65             status = LE_DIS_CONNECTED;
66             break;
67         } else {
68             break;
69         }
70     }
71     if (status != LE_SUCCESS) {
72         FreeBuffer(loopHandle, NULL, buffer);
73         return status;
74     }
75     if (recvMessage) {
76         recvMessage(taskHandle, buffer->data, readLen);
77     }
78     FreeBuffer(loopHandle, NULL, buffer);
79     return status;
80 }
81 
HandleStreamEvent_(const LoopHandle loopHandle,const TaskHandle handle,uint32_t oper)82 static LE_STATUS HandleStreamEvent_(const LoopHandle loopHandle, const TaskHandle handle, uint32_t oper)
83 {
84     EventLoop *loop = (EventLoop *)loopHandle;
85     StreamConnectTask *stream = (StreamConnectTask *)handle;
86     LE_LOGV("HandleStreamEvent_ fd:%d oper 0x%x", GetSocketFd(handle), oper);
87 
88     LE_STATUS status = LE_SUCCESS;
89     if (LE_TEST_FLAGS(oper, Event_Write)) {
90         status = HandleSendMsg_(loopHandle, handle, stream->sendMessageComplete);
91     }
92     if (LE_TEST_FLAGS(oper, Event_Read)) {
93         status = HandleRecvMsg_(loopHandle, handle, stream->recvMessage);
94     }
95     if (status == LE_DIS_CONNECTED) {
96         loop->delEvent(loop, GetSocketFd(handle), Event_Read | Event_Write);
97         if (stream->disConnectComplete) {
98             stream->disConnectComplete(handle);
99         }
100         LE_CloseStreamTask(loopHandle, handle);
101     }
102     return status;
103 }
104 
HandleClientEvent_(const LoopHandle loopHandle,const TaskHandle handle,uint32_t oper)105 static LE_STATUS HandleClientEvent_(const LoopHandle loopHandle, const TaskHandle handle, uint32_t oper)
106 {
107     StreamClientTask *client = (StreamClientTask *)handle;
108     LE_LOGV("HandleClientEvent_ fd:%d oper 0x%x", GetSocketFd(handle), oper);
109 
110     LE_STATUS status = LE_SUCCESS;
111     if (LE_TEST_FLAGS(oper, Event_Write)) {
112         LE_ONLY_CHECK(!(client->connected == 0 && client->connectComplete), client->connectComplete(handle));
113         client->connected = 1;
114         status = HandleSendMsg_(loopHandle, handle, client->sendMessageComplete);
115     }
116     if (LE_TEST_FLAGS(oper, Event_Read)) {
117         status = HandleRecvMsg_(loopHandle, handle, client->recvMessage);
118     }
119     if (status == LE_DIS_CONNECTED) {
120         if (client->disConnectComplete) {
121             client->disConnectComplete(handle);
122         }
123         client->connected = 0;
124         LE_CloseStreamTask(loopHandle, handle);
125     }
126     return status;
127 }
128 
HandleStreamTaskClose_(const LoopHandle loopHandle,const TaskHandle taskHandle)129 static void HandleStreamTaskClose_(const LoopHandle loopHandle, const TaskHandle taskHandle)
130 {
131     BaseTask *task = (BaseTask *)taskHandle;
132     CloseTask(loopHandle, task);
133     DelTask((EventLoop *)loopHandle, task);
134     if (task->taskId.fd > 0) {
135         close(task->taskId.fd);
136     }
137 }
138 
HandleServerEvent_(const LoopHandle loopHandle,const TaskHandle serverTask,uint32_t oper)139 static LE_STATUS HandleServerEvent_(const LoopHandle loopHandle, const TaskHandle serverTask, uint32_t oper)
140 {
141     LE_LOGV("HandleServerEvent_ fd %d oper 0x%x", GetSocketFd(serverTask), oper);
142     if (!LE_TEST_FLAGS(oper, Event_Read)) {
143         return LE_FAILURE;
144     }
145     StreamServerTask *server = (StreamServerTask *)serverTask;
146     LE_ONLY_CHECK(server->incommingConnect != NULL, return LE_SUCCESS);
147 
148     int ret = server->incommingConnect(loopHandle, serverTask);
149     if (ret != LE_SUCCESS) {
150         LE_LOGE("HandleServerEvent_ fd %d do not accept socket", GetSocketFd(serverTask));
151     }
152     EventLoop *loop = (EventLoop *)loopHandle;
153     loop->modEvent(loop, (const BaseTask *)serverTask, Event_Read);
154     return LE_SUCCESS;
155 }
156 
LE_CreateStreamServer(const LoopHandle loopHandle,TaskHandle * taskHandle,const LE_StreamServerInfo * info)157 LE_STATUS LE_CreateStreamServer(const LoopHandle loopHandle,
158     TaskHandle *taskHandle, const LE_StreamServerInfo *info)
159 {
160     LE_CHECK(loopHandle != NULL && taskHandle != NULL && info != NULL, return LE_INVALID_PARAM, "Invalid parameters");
161     LE_CHECK(info->server != NULL, return LE_INVALID_PARAM, "Invalid parameters server");
162     LE_CHECK(info->incommingConnect != NULL, return LE_INVALID_PARAM,
163         "Invalid parameters incommingConnect %s", info->server);
164 
165     int fd = info->socketId;
166     if (info->socketId <= 0) {
167         fd = CreateSocket(info->baseInfo.flags, info->server);
168         LE_CHECK(fd > 0, return LE_FAILURE, "Failed to create socket %s", info->server);
169     }
170 
171     EventLoop *loop = (EventLoop *)loopHandle;
172     StreamServerTask *task = (StreamServerTask *)CreateTask(loopHandle, fd, &info->baseInfo,
173         sizeof(StreamServerTask) + strlen(info->server) + 1);
174     LE_CHECK(task != NULL, close(fd);
175         return LE_NO_MEMORY, "Failed to create task");
176     task->base.handleEvent = HandleServerEvent_;
177     task->base.innerClose = HandleStreamTaskClose_;
178     task->incommingConnect = info->incommingConnect;
179     loop->addEvent(loop, (const BaseTask *)task, Event_Read);
180     int ret = memcpy_s(task->server, strlen(info->server) + 1, info->server, strlen(info->server) + 1);
181     LE_CHECK(ret == 0, return LE_FAILURE, "Failed to copy server name %s", info->server);
182     *taskHandle = (TaskHandle)task;
183     return LE_SUCCESS;
184 }
185 
LE_CreateStreamClient(const LoopHandle loopHandle,TaskHandle * taskHandle,const LE_StreamInfo * info)186 LE_STATUS LE_CreateStreamClient(const LoopHandle loopHandle,
187     TaskHandle *taskHandle, const LE_StreamInfo *info)
188 {
189     LE_CHECK(loopHandle != NULL && taskHandle != NULL && info != NULL, return LE_INVALID_PARAM, "Invalid parameters");
190     LE_CHECK(info->recvMessage != NULL, return LE_FAILURE, "Invalid parameters recvMessage %s", info->server);
191 
192     int fd = CreateSocket(info->baseInfo.flags, info->server);
193     LE_CHECK(fd > 0, return LE_FAILURE, "Failed to create socket %s", info->server);
194 
195     StreamClientTask *task = (StreamClientTask *)CreateTask(loopHandle, fd, &info->baseInfo, sizeof(StreamClientTask));
196     LE_CHECK(task != NULL, close(fd);
197         return LE_NO_MEMORY, "Failed to create task");
198     task->stream.base.handleEvent = HandleClientEvent_;
199     task->stream.base.innerClose = HandleStreamTaskClose_;
200     OH_ListInit(&task->stream.buffHead);
201     LoopMutexInit(&task->stream.mutex);
202 
203     task->connectComplete = info->connectComplete;
204     task->sendMessageComplete = info->sendMessageComplete;
205     task->recvMessage = info->recvMessage;
206     task->disConnectComplete = info->disConnectComplete;
207     EventLoop *loop = (EventLoop *)loopHandle;
208     loop->addEvent(loop, (const BaseTask *)task, Event_Read);
209     *taskHandle = (TaskHandle)task;
210     return LE_SUCCESS;
211 }
212 
LE_AcceptStreamClient(const LoopHandle loopHandle,const TaskHandle server,TaskHandle * taskHandle,const LE_StreamInfo * info)213 LE_STATUS LE_AcceptStreamClient(const LoopHandle loopHandle, const TaskHandle server,
214     TaskHandle *taskHandle, const LE_StreamInfo *info)
215 {
216     LE_CHECK(loopHandle != NULL && info != NULL, return LE_INVALID_PARAM, "Invalid parameters");
217     LE_CHECK(server != NULL && taskHandle != NULL, return LE_INVALID_PARAM, "Invalid parameters");
218     LE_CHECK(info->recvMessage != NULL, return LE_INVALID_PARAM, "Invalid parameters recvMessage");
219     int fd = -1;
220     if ((info->baseInfo.flags & TASK_TEST) != TASK_TEST) {
221         fd = AcceptSocket(GetSocketFd(server), info->baseInfo.flags);
222         LE_CHECK(fd > 0, return LE_FAILURE, "Failed to accept socket %d", GetSocketFd(server));
223     }
224     StreamConnectTask *task = (StreamConnectTask *)CreateTask(
225         loopHandle, fd, &info->baseInfo, sizeof(StreamConnectTask));
226     LE_CHECK(task != NULL, close(fd);
227         return LE_NO_MEMORY, "Failed to create task");
228     task->stream.base.handleEvent = HandleStreamEvent_;
229     task->stream.base.innerClose = HandleStreamTaskClose_;
230     task->disConnectComplete = info->disConnectComplete;
231     task->sendMessageComplete = info->sendMessageComplete;
232     task->recvMessage = info->recvMessage;
233     task->serverTask = (StreamServerTask *)server;
234     OH_ListInit(&task->stream.buffHead);
235     LoopMutexInit(&task->stream.mutex);
236     if ((info->baseInfo.flags & TASK_TEST) != TASK_TEST) {
237         EventLoop *loop = (EventLoop *)loopHandle;
238         loop->addEvent(loop, (const BaseTask *)task, Event_Read);
239     }
240     *taskHandle = (TaskHandle)task;
241     return 0;
242 }
243 
LE_CloseStreamTask(const LoopHandle loopHandle,const TaskHandle taskHandle)244 void LE_CloseStreamTask(const LoopHandle loopHandle, const TaskHandle taskHandle)
245 {
246     LE_CHECK(loopHandle != NULL && taskHandle != NULL, return, "Invalid parameters");
247     LE_CloseTask(loopHandle, taskHandle);
248 }
249 
LE_GetSocketFd(const TaskHandle taskHandle)250 int LE_GetSocketFd(const TaskHandle taskHandle)
251 {
252     LE_CHECK(taskHandle != NULL, return -1, "Invalid parameters");
253     return GetSocketFd(taskHandle);
254 }