4 * Copyright (c) 2017 Samsung Electronics Co., Ltd.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
27 #include "sensor_log.h"
28 #include "channel_event_handler.h"
30 #define SYSTEMD_SOCK_BUF_SIZE (128*1024)
34 class send_event_handler : public event_handler
37 send_event_handler(channel *ch, std::shared_ptr<message> msg)
42 bool handle(int fd, event_condition condition)
48 m_ch->remove_pending_event_id(m_event_id);
50 if (!m_ch->is_connected()) {
54 if (condition & (EVENT_IN | EVENT_HUP)) {
58 if (!m_ch->send_sync(*m_msg)) {
67 std::shared_ptr<message> m_msg;
70 class read_event_handler : public event_handler
73 read_event_handler(channel *ch)
77 bool handle(int fd, event_condition condition)
83 m_ch->remove_pending_event_id(m_event_id);
85 if (!m_ch->is_connected()) {
89 if (condition & (EVENT_OUT | EVENT_HUP)) {
94 if (!m_ch->read_sync(msg, false)) {
105 channel::channel(socket *sock)
106 : m_fd(sock->get_fd())
118 _D("Destroyed[%llu]", m_event_id);
122 uint64_t channel::bind(void)
125 m_event_id = m_loop->add_event(m_socket->get_fd(),
126 (EVENT_IN | EVENT_HUP | EVENT_NVAL),
127 dynamic_cast<channel_event_handler *>(m_handler));
129 _D("Bound[%llu]", m_event_id);
133 uint64_t channel::bind(channel_handler *handler, event_loop *loop, bool loop_bind)
137 m_connected.store(true);
140 m_handler->connected(this);
148 uint64_t channel::connect(channel_handler *handler, event_loop *loop, bool loop_bind)
150 if (!m_socket->connect())
153 bind(handler, loop, loop_bind);
155 _D("Connected[%llu]", m_event_id);
159 void channel::disconnect(void)
161 if (!is_connected()) {
162 _D("Channel is not connected");
166 m_connected.store(false);
168 _D("Disconnecting..[%llu]", m_event_id);
171 m_handler->disconnected(this);
176 for(auto id : m_pending_event_id) {
177 _D("Remove pending event id[%llu]", id);
178 m_loop->remove_event(id, true);
180 _D("Remove event[%llu]", m_event_id);
181 m_loop->remove_event(m_event_id, true);
187 _D("Release socket[%d]", m_socket->get_fd());
195 bool channel::send(std::shared_ptr<message> msg)
198 int cur_buffer_size = 0;
200 retv_if(!m_loop, false);
202 while (retry_cnt < 3) {
203 cur_buffer_size = m_socket->get_current_buffer_size();
204 if (cur_buffer_size <= SYSTEMD_SOCK_BUF_SIZE)
209 retvm_if(retry_cnt >= 3, false, "Socket buffer[%d] is exceeded", cur_buffer_size);
211 send_event_handler *handler = new(std::nothrow) send_event_handler(this, msg);
212 retvm_if(!handler, false, "Failed to allocate memory");
214 uint64_t event_id = m_loop->add_event(m_socket->get_fd(), (EVENT_OUT | EVENT_HUP | EVENT_NVAL), handler);
216 _D("Failed to add send event handler");
221 m_pending_event_id.push_back(event_id);
225 bool channel::send_sync(message &msg)
227 retvm_if(msg.size() >= MAX_MSG_CAPACITY, true, "Invaild message size[%u]", msg.size());
230 char *buf = msg.body();
233 size = m_socket->send(reinterpret_cast<void *>(msg.header()),
234 sizeof(message_header), true);
235 retvm_if(size <= 0, false, "Failed to send header");
237 /* if body size is zero, skip to send body message */
238 retv_if(msg.size() == 0, true);
241 size = m_socket->send(buf, msg.size(), true);
242 retvm_if(size <= 0, false, "Failed to send body");
247 bool channel::read(void)
249 retv_if(!m_loop, false);
251 read_event_handler *handler = new(std::nothrow) read_event_handler(this);
252 retvm_if(!handler, false, "Failed to allocate memory");
254 uint64_t event_id = m_loop->add_event(m_socket->get_fd(), (EVENT_IN | EVENT_HUP | EVENT_NVAL), handler);
256 _D("Failed to add read event handler");
261 m_pending_event_id.push_back(event_id);
265 bool channel::read_sync(message &msg, bool select)
267 message_header header;
269 char buf[MAX_MSG_CAPACITY];
272 size = m_socket->recv(&header, sizeof(message_header), select);
273 retv_if(size <= 0, false);
275 /* check error from header */
276 if (m_handler && header.err != 0) {
277 m_handler->error_caught(this, header.err);
278 msg.header()->err = header.err;
283 if (header.length >= MAX_MSG_CAPACITY) {
284 _E("header.length error %u", header.length);
288 if (header.length > 0) {
289 size = m_socket->recv(&buf, header.length, select);
290 retv_if(size <= 0, false);
293 buf[header.length] = '\0';
294 msg.enclose(reinterpret_cast<const void *>(buf), header.length);
295 msg.set_type(header.type);
296 msg.header()->err = header.err;
299 m_handler->read(this, msg);
304 bool channel::is_connected(void)
306 return m_connected.load();
309 bool channel::set_option(int type, int value)
313 m_socket->set_buffer_size(type, value);
316 m_socket->set_buffer_size(type, value);
325 bool channel::get_option(int type, int &value) const
329 value = m_socket->get_current_buffer_size();
332 value = m_socket->get_buffer_size(type);
335 value = m_socket->get_buffer_size(type);
344 int channel::get_fd(void) const
349 void channel::remove_pending_event_id(uint64_t id)
351 auto it = std::find(m_pending_event_id.begin(), m_pending_event_id.end(), id);
352 if (it != m_pending_event_id.end()) {
353 m_pending_event_id.erase(it);