2 * Copyright (C) 2015, 2016 "IoT.bzh"
3 * Author "Romain Forlot" <romain.forlot@iot.bzh>
4 * Author "Loic Collignon" <loic.collignon@iot.bzh>
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.
19 #include "low-can-hat.hpp"
26 #include <json-c/json.h>
27 #include <systemd/sd-event.h>
29 #include "openxc.pb.h"
30 #include "configuration.hpp"
31 #include "../can/can-bus.hpp"
32 #include "../can/can-signals.hpp"
33 #include "../can/can-message.hpp"
34 #include "../utils/timer.hpp"
35 #include "../utils/signals.hpp"
36 #include "../diagnostic/diagnostic-message.hpp"
37 #include "../utils/openxc-utils.hpp"
41 #include <afb/afb-service-itf.h>
44 void on_no_clients(std::string message)
46 DiagnosticRequest* diag_req = configuration_t::instance().get_request_from_diagnostic_message(message);
47 if(diag_req != nullptr)
49 active_diagnostic_request_t* adr = configuration_t::instance().get_diagnostic_manager().find_recurring_request(diag_req);
51 configuration_t::instance().get_diagnostic_manager().cleanup_request(adr, true);
57 static void push_n_notify(const can_message_t& cm)
59 can_bus_t& cbm = configuration_t::instance().get_can_bus_manager();
60 std::lock_guard<std::mutex> can_message_lock(cbm.get_can_message_mutex());
61 { cbm.push_new_can_message(cm); }
62 cbm.get_new_can_message_cv().notify_one();
65 int read_message(sd_event_source *s, int fd, uint32_t revents, void *userdata)
69 diagnostic_manager_t& diag_m = configuration_t::instance().get_diagnostic_manager();
71 if(userdata != nullptr)
73 sig = (can_signal_t*)userdata;
74 utils::socketcan_bcm_t s = sig->get_socket();
79 utils::socketcan_bcm_t s = diag_m.get_socket();
85 /* check if error or hangup */
86 if ((revents & (EPOLLERR|EPOLLRDHUP|EPOLLHUP)) != 0)
88 sd_event_source_unref(s);
89 if(userdata != nullptr)
91 sig->get_socket().close();
92 sig->create_rx_filter();
93 NOTICE(binder_interface, "%s: Recreated RX_SETUP BCM job for signal: %s", __FUNCTION__, sig->get_name().c_str());
97 diag_m.get_socket().close();
98 diag_m.cleanup_active_requests(true);
99 ERROR(binder_interface, "%s: Error on diagnostic manager socket, cancelling active requests.", __FUNCTION__);
108 ///******************************************************************************
110 /// Subscription and unsubscription
112 ///*******************************************************************************/
114 static int make_subscription_unsubscription(struct afb_req request, const std::string& sig_name, std::map<std::string, struct afb_event>& s, bool subscribe)
116 /* Make the subscription or unsubscription to the event */
117 if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, s[sig_name])) < 0)
119 ERROR(binder_interface, "%s: Operation goes wrong for signal: %s", __FUNCTION__, sig_name.c_str());
125 static int create_event_handle(const std::string& sig_name, std::map<std::string, struct afb_event>& s)
127 s[sig_name] = afb_daemon_make_event(binder_interface->daemon, sig_name.c_str());
128 if (!afb_event_is_valid(s[sig_name]))
130 ERROR(binder_interface, "%s: Can't create an event for %s, something goes wrong.", __FUNCTION__, sig_name.c_str());
136 /// @brief Will determine if it is needed or not to create the event handle and checks it to be sure that
137 /// we got a valid afb_event to get subscribe or unsubscribe. Then launch the subscription or unsubscription
138 /// against the application framework using that event handle.
139 static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const std::string& sig)
143 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
145 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
146 std::map<std::string, struct afb_event>& s = sm.get_subscribed_signals();
147 if (s.find(sig) != s.end())
149 if (!afb_event_is_valid(s[sig]) && !subscribe)
151 NOTICE(binder_interface, "%s: Event isn't valid, no need to unsubscribed.", __FUNCTION__);
156 // Event it isn't valid annymore, recreate it
157 ret = create_event_handle(sig, s);
162 /* Event doesn't exist , so let's create it */
163 struct afb_event empty_event = {nullptr, nullptr};
164 s[sig] = empty_event;
165 ret = create_event_handle(sig, s);
168 // Check whether or not the event handler has been correctly created and
169 // make the subscription/unsubscription operation is so.
172 return make_subscription_unsubscription(request, sig, s, subscribe);
176 /// @brief subscribe to all signals in the vector signals
178 /// @param[in] afb_req request : contain original request use to subscribe or unsubscribe
179 /// @param[in] subscribe boolean value used to chose between a subscription operation or an unsubscription
180 /// @param[in] signals - struct containing vectors with can_signal_t and diagnostic_messages to subscribe
182 /// @return Number of correctly subscribed signal
184 static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const struct utils::signals_found& signals)
188 //TODO: Implement way to dynamically call the right function no matter
189 // how much signals types we have.
190 configuration_t& conf = configuration_t::instance();
192 for(const auto& sig : signals.diagnostic_messages)
195 diagnostic_manager_t& diag_m = conf.get_diagnostic_manager();
196 DiagnosticRequest* diag_req = conf.get_request_from_diagnostic_message(sig->get_name());
198 // If the requested diagnostic message isn't supported by the car then unsubcribe it
199 // no matter what we want, worse case will be a fail unsubscription but at least we don't
200 // poll a PID for nothing.
201 if(sig->get_supported() && subscribe)
203 float frequency = sig->get_frequency();
204 diag_m.add_recurring_request(diag_req, sig->get_name().c_str(), false, sig->get_decoder(), sig->get_callback(), (float)frequency);
205 //TODO: Adding callback requesting ignition status: diag_req, sig.c_str(), false, diagnostic_message_t::decode_obd2_response, diagnostic_message_t::check_ignition_status, frequency);
209 diag_m.cleanup_request(
210 diag_m.find_recurring_request(diag_req), true);
211 WARNING(binder_interface, "%s: signal: %s isn't supported. Canceling operation.", __FUNCTION__, sig->get_name().c_str());
217 ret = subscribe_unsubscribe_signal(request, subscribe, sig->get_name());
221 DEBUG(binder_interface, "%s: Signal: %s subscribed", __FUNCTION__, sig->get_name().c_str());
224 for(const auto& sig: signals.can_signals)
226 if(sig->create_rx_filter() <= 0 &&
227 subscribe_unsubscribe_signal(request, subscribe, sig->get_name()) <=0)
231 struct sd_event_source* e_source;
232 sd_event_add_io(afb_daemon_get_event_loop(binder_interface->daemon), &e_source, sig->get_socket().socket(), EPOLLIN, read_message, sig.get());
234 DEBUG(binder_interface, "%s: signal: %s subscribed", __FUNCTION__, sig->get_name().c_str());
239 static int process_args(struct afb_req request, const std::map<std::string, struct event_filter_t>& args, bool subscribe)
241 struct utils::signals_found sf;
242 int ok = 0, total = 0;
244 for(const auto& sig: args)
246 openxc_DynamicField search_key = build_DynamicField(sig.first);
247 sf = utils::signals_manager_t::instance().find_signals(search_key);
248 total = (int)sf.can_signals.size() + (int)sf.diagnostic_messages.size();
250 if (sf.can_signals.empty() && sf.diagnostic_messages.empty())
251 NOTICE(binder_interface, "%s: No signal(s) found for %s.", __FUNCTION__, sig.first.c_str());
253 ok = subscribe_unsubscribe_signals(request, subscribe, sf);
255 NOTICE(binder_interface, "%s: Subscribed/unsubscribe correctly to %d/%d signal(s).", __FUNCTION__, ok, total);
259 static int parse_filter(json_object* event, struct event_filter_t* event_filter)
261 struct json_object *filter, *obj;
264 if (json_object_object_get_ex(event, "filter", &filter))
266 event_filter->frequency = -1.0;
267 event_filter->min = -1.0;
268 event_filter->max = -1.0;
269 if (json_object_object_get_ex(filter, "frequency", &obj)
270 && json_object_get_type(obj) == json_type_double)
272 event_filter->frequency = json_object_get_double(obj);
275 if (json_object_object_get_ex(filter, "min", &obj)
276 && json_object_get_type(obj) == json_type_double)
278 event_filter->min = json_object_get_double(obj);
281 if (json_object_object_get_ex(filter, "max", &obj)
282 && json_object_get_type(obj) == json_type_double)
284 event_filter->max = json_object_get_double(obj);
292 static const std::map<std::string, struct event_filter_t> parse_args_from_request(struct afb_req request)
295 std::map<std::string, struct event_filter_t> ret;
296 struct json_object *args, *event, *x;
297 struct event_filter_t event_filter;
299 /* retrieve signals to subscribe */
300 args = afb_req_json(request);
301 if (args == NULL || !json_object_object_get_ex(args, "event", &event))
303 event = json_object_new_string("*");
304 parse_filter(event, &event_filter);
305 ret["*"] = event_filter;
307 else if (json_object_get_type(event) != json_type_array)
309 const std::string event_pattern = std::string(json_object_get_string(event));
310 parse_filter(event, &event_filter);
311 ret[event_pattern] = event_filter;
315 n = json_object_array_length(event);
316 for (i = 0 ; i < n ; i++)
318 x = json_object_array_get_idx(event, i);
319 const std::string event_pattern = std::string(json_object_get_string(x));
320 parse_filter(x, &event_filter);
321 ret[event_pattern] = event_filter;
328 void subscribe(struct afb_req request)
330 bool subscribe = true;
332 const std::map<std::string, struct event_filter_t> args = parse_args_from_request(request);
334 if (process_args(request, args, subscribe) > 0)
335 afb_req_success(request, NULL, NULL);
337 afb_req_fail(request, "error", NULL);
340 void unsubscribe(struct afb_req request)
342 bool subscribe = false;
344 const std::map<std::string, struct event_filter_t> args = parse_args_from_request(request);
346 if (process_args(request, args, subscribe) > 0)
347 afb_req_success(request, NULL, NULL);
349 afb_req_fail(request, "error", NULL);