2 * Copyright (C) 2015, 2018 "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"
20 #include "low-can-apidef.h"
27 #include <wrap-json.h>
28 #include <systemd/sd-event.h>
29 #include "openxc.pb.h"
30 #include "application.hpp"
31 #include "../can/can-encoder.hpp"
32 #include "../can/can-bus.hpp"
33 #include "../can/signals.hpp"
34 #include "../can/message/message.hpp"
35 #include "../utils/signals.hpp"
36 #include "../diagnostic/diagnostic-message.hpp"
37 #include "../utils/openxc-utils.hpp"
38 #include "../utils/signals.hpp"
40 #ifdef USE_FEATURE_J1939
41 #include "../can/message/j1939-message.hpp"
42 #include <linux/can/j1939.h>
44 ///******************************************************************************
46 /// SystemD event loop Callbacks
48 ///*******************************************************************************/
50 void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, uint32_t pid, std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
52 bool is_permanent_recurring_request = false;
54 if( ! can_subscription->get_diagnostic_message().empty() && can_subscription->get_diagnostic_message(pid) != nullptr)
56 DiagnosticRequest diag_req = can_subscription->get_diagnostic_message(pid)->build_diagnostic_request();
57 active_diagnostic_request_t* adr = application_t::instance().get_diagnostic_manager().find_recurring_request(diag_req);
60 is_permanent_recurring_request = adr->get_permanent();
62 if(! is_permanent_recurring_request)
63 application_t::instance().get_diagnostic_manager().cleanup_request(adr, true);
67 if(! is_permanent_recurring_request)
68 on_no_clients(can_subscription, s);
71 void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
73 auto it = s.find(can_subscription->get_index());
77 static void push_n_notify(std::shared_ptr<message_t> m)
79 can_bus_t& cbm = application_t::instance().get_can_bus_manager();
81 std::lock_guard<std::mutex> can_message_lock(cbm.get_can_message_mutex());
82 cbm.push_new_can_message(m);
84 cbm.get_new_can_message_cv().notify_one();
87 int read_message(sd_event_source *event_source, int fd, uint32_t revents, void *userdata)
90 low_can_subscription_t* can_subscription = (low_can_subscription_t*)userdata;
93 if ((revents & EPOLLIN) != 0)
95 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
96 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
97 if(can_subscription->get_index() != -1)
99 std::shared_ptr<utils::socketcan_t> s = can_subscription->get_socket();
100 if(s->socket() && s->socket() != -1)
102 std::shared_ptr<message_t> message = s->read_message();
104 // Sure we got a valid CAN message ?
105 if (! message->get_id() == 0 && ! message->get_length() == 0 && !(message->get_flags()&INVALID_FLAG))
107 push_n_notify(message);
113 // check if error or hangup
114 if ((revents & (EPOLLERR|EPOLLRDHUP|EPOLLHUP)) != 0)
116 sd_event_source_unref(event_source);
117 can_subscription->get_socket()->close();
123 ///******************************************************************************
125 /// Subscription and unsubscription
127 ///*******************************************************************************/
129 /// @brief This will determine if an event handle needs to be created and checks if
130 /// we got a valid afb_event to get subscribe or unsubscribe. After that launch the subscription or unsubscription
131 /// against the application framework using that event handle.
132 static int subscribe_unsubscribe_signal(afb_req_t request,
134 std::shared_ptr<low_can_subscription_t>& can_subscription,
135 std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
138 int sub_index = can_subscription->get_index();
139 bool subscription_exists = s.count(sub_index);
144 /* There is no valid request to subscribe so this must be an
145 * internal permanent diagnostic request. Skip the subscription
146 * part and don't register it into the current "low-can"
154 // Event doesn't exist , so let's create it
155 if ((ret = can_subscription->subscribe(request)) < 0)
158 if(! subscription_exists)
159 s[sub_index] = can_subscription;
164 // Unsubscrition part
165 if(! subscription_exists)
167 AFB_NOTICE("There isn't any valid subscriptions for that request.");
170 else if (subscription_exists &&
171 ! afb_event_is_valid(s[sub_index]->get_event()) )
173 AFB_NOTICE("Event isn't valid, no need to unsubscribed.");
177 if( (ret = s[sub_index]->unsubscribe(request)) < 0)
179 s.find(sub_index)->second->set_index(-1);
184 static int add_to_event_loop(std::shared_ptr<low_can_subscription_t>& can_subscription)
186 struct sd_event_source* event_source = nullptr;
187 return ( sd_event_add_io(afb_daemon_get_event_loop(),
189 can_subscription->get_socket()->socket(),
192 can_subscription.get()));
195 static int subscribe_unsubscribe_diagnostic_messages(afb_req_t request,
197 std::vector<std::shared_ptr<diagnostic_message_t> > diagnostic_messages,
198 struct event_filter_t& event_filter,
199 std::map<int, std::shared_ptr<low_can_subscription_t> >& s,
200 bool perm_rec_diag_req)
203 application_t& app = application_t::instance();
204 diagnostic_manager_t& diag_m = app.get_diagnostic_manager();
206 for(const auto& sig : diagnostic_messages)
208 DiagnosticRequest* diag_req = new DiagnosticRequest(sig->build_diagnostic_request());
209 event_filter.frequency = event_filter.frequency == 0 ? sig->get_frequency() : event_filter.frequency;
210 std::shared_ptr<low_can_subscription_t> can_subscription;
212 auto it = std::find_if(s.begin(), s.end(), [&sig](std::pair<int, std::shared_ptr<low_can_subscription_t> > sub)
214 return (! sub.second->get_diagnostic_message().empty());
216 can_subscription = it != s.end() ?
218 std::make_shared<low_can_subscription_t>(low_can_subscription_t(event_filter));
219 // If the requested diagnostic message is not supported by the car then unsubcribe it
220 // no matter what we want, worst case will be a failed unsubscription but at least we won't
221 // poll a PID for nothing.
222 if(sig->get_supported() && subscribe)
224 if (!app.isEngineOn())
225 AFB_WARNING("signal: Engine is off, %s won't received responses until it's on", sig->get_name().c_str());
227 diag_m.add_recurring_request(diag_req, sig->get_name().c_str(), false, sig->get_decoder(), sig->get_callback(), event_filter.frequency, perm_rec_diag_req);
228 if(can_subscription->create_rx_filter(sig) < 0)
230 AFB_DEBUG("Signal: %s subscribed", sig->get_name().c_str());
231 if(it == s.end() && add_to_event_loop(can_subscription) < 0)
233 diag_m.cleanup_request(
234 diag_m.find_recurring_request(*diag_req), true);
235 AFB_WARNING("signal: %s isn't supported. Canceling operation.", sig->get_name().c_str());
241 if(sig->get_supported())
243 AFB_DEBUG("%s cancelled due to unsubscribe", sig->get_name().c_str());
247 AFB_WARNING("signal: %s isn't supported. Canceling operation.", sig->get_name().c_str());
251 int ret = subscribe_unsubscribe_signal(request, subscribe, can_subscription, s);
260 static int subscribe_unsubscribe_signals(afb_req_t request,
262 std::vector<std::shared_ptr<signal_t> > signals,
263 struct event_filter_t& event_filter,
264 std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
267 for(const auto& sig: signals)
269 auto it = std::find_if(s.begin(), s.end(), [&sig, &event_filter](std::pair<int, std::shared_ptr<low_can_subscription_t> > sub)
271 return sub.second->is_signal_subscription_corresponding(sig, event_filter) ;
273 std::shared_ptr<low_can_subscription_t> can_subscription;
275 {can_subscription = it->second;}
278 can_subscription = std::make_shared<low_can_subscription_t>(low_can_subscription_t(event_filter));
279 if(can_subscription->create_rx_filter(sig) < 0)
281 if(add_to_event_loop(can_subscription) < 0)
285 if(subscribe_unsubscribe_signal(request, subscribe, can_subscription, s) < 0)
289 AFB_DEBUG("%s Signal: %s %ssubscribed", sig->get_message()->is_fd() ? "FD": "", sig->get_name().c_str(), subscribe ? "":"un");
295 /// @brief subscribe to all signals in the vector signals
297 /// @param[in] afb_req request : contains original request use to subscribe or unsubscribe
298 /// @param[in] subscribe boolean value, which chooses between a subscription operation or an unsubscription
299 /// @param[in] signals - struct containing vectors with signal_t and diagnostic_messages to subscribe
301 /// @return Number of correctly subscribed signal
303 static int subscribe_unsubscribe_signals(afb_req_t request,
305 const struct utils::signals_found& signals,
306 struct event_filter_t& event_filter)
309 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
311 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
312 std::map<int, std::shared_ptr<low_can_subscription_t> >& s = sm.get_subscribed_signals();
314 rets += subscribe_unsubscribe_diagnostic_messages(request, subscribe, signals.diagnostic_messages, event_filter, s, false);
315 rets += subscribe_unsubscribe_signals(request, subscribe, signals.signals, event_filter, s);
320 static event_filter_t generate_filter(json_object* args)
322 event_filter_t event_filter;
323 struct json_object *filter, *obj;
325 // computes the filter
326 if (json_object_object_get_ex(args, "filter", &filter))
328 if (json_object_object_get_ex(filter, "frequency", &obj)
329 && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int)))
330 {event_filter.frequency = (float)json_object_get_double(obj);}
331 if (json_object_object_get_ex(filter, "min", &obj)
332 && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int)))
333 {event_filter.min = (float)json_object_get_double(obj);}
334 if (json_object_object_get_ex(filter, "max", &obj)
335 && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int)))
336 {event_filter.max = (float)json_object_get_double(obj);}
342 static int one_subscribe_unsubscribe_events(afb_req_t request, bool subscribe, const std::string& tag, json_object* args)
345 struct utils::signals_found sf;
347 // subscribe or unsubscribe
348 openxc_DynamicField search_key = build_DynamicField(tag);
349 sf = utils::signals_manager_t::instance().find_signals(search_key);
350 if (sf.signals.empty() && sf.diagnostic_messages.empty())
352 AFB_NOTICE("No signal(s) found for %s.", tag.c_str());
357 event_filter_t event_filter = generate_filter(args);
358 ret = subscribe_unsubscribe_signals(request, subscribe, sf, event_filter);
363 static int one_subscribe_unsubscribe_id(afb_req_t request, bool subscribe, const uint32_t& id ,json_object *args)
366 std::shared_ptr<message_definition_t> message_definition = application_t::instance().get_message_definition(id);
367 struct utils::signals_found sf;
369 if(message_definition)
371 sf.signals = message_definition->get_signals();
374 if(sf.signals.empty())
376 AFB_NOTICE("No signal(s) found for %d.", id);
381 event_filter_t event_filter = generate_filter(args);
382 ret = subscribe_unsubscribe_signals(request, subscribe, sf, event_filter);
388 static int process_one_subscribe_args(afb_req_t request, bool subscribe, json_object *args)
391 json_object *x = nullptr, *event = nullptr, *id = nullptr;
394 // 2 cases : ID(PGN) and event
396 json_object_object_get_ex(args,"event",&event);
397 json_bool test_id = json_object_object_get_ex(args,"id",&id);
400 test_id = json_object_object_get_ex(args,"pgn",&id);
403 if( args == NULL || (id && ((std::string)json_object_get_string(id)).compare("*") == 0))
405 rc = one_subscribe_unsubscribe_events(request, subscribe, "*", args);
411 if (json_object_get_type(event) != json_type_array) // event is set before and check if it's an array
413 rc = one_subscribe_unsubscribe_events(request, subscribe, json_object_get_string(event), args);
415 else // event is set and it's not an array
417 for (int i = 0 ; i < json_object_array_length(event); i++)
419 x = json_object_array_get_idx(event, i);
420 rc2 = one_subscribe_unsubscribe_events(request, subscribe, json_object_get_string(x), args);
422 rc = rc2 >= 0 ? rc + rc2 : rc2;
429 if (json_object_get_type(id) != json_type_array) // id is set before and check if it's an array
431 rc = one_subscribe_unsubscribe_id(request, subscribe, json_object_get_int(id), args);
433 else // event is set and it's not an array
435 for (int i = 0 ; i < json_object_array_length(id); i++)
437 x = json_object_array_get_idx(id, i);
438 rc2 = one_subscribe_unsubscribe_id(request, subscribe, json_object_get_int(x), args);
440 rc = rc2 >= 0 ? rc + rc2 : rc2;
448 static void do_subscribe_unsubscribe(afb_req_t request, bool subscribe)
451 struct json_object *args, *x;
453 args = afb_req_json(request);
454 if (json_object_get_type(args) == json_type_array)
456 for(int i = 0; i < json_object_array_length(args); i++)
458 x = json_object_array_get_idx(args, i);
459 rc += process_one_subscribe_args(request, subscribe, x);
464 rc += process_one_subscribe_args(request, subscribe, args);
468 afb_req_success(request, NULL, NULL);
470 afb_req_fail(request, "error", NULL);
473 void auth(afb_req_t request)
475 afb_req_session_set_LOA(request, 1);
476 afb_req_success(request, NULL, NULL);
479 void subscribe(afb_req_t request)
481 do_subscribe_unsubscribe(request, true);
484 void unsubscribe(afb_req_t request)
486 do_subscribe_unsubscribe(request, false);
490 static int send_frame(struct canfd_frame& cfd, const std::string& bus_name, socket_type type)
497 std::map<std::string, std::shared_ptr<low_can_subscription_t> >& cd = application_t::instance().get_can_devices();
499 if( cd.count(bus_name) == 0)
501 cd[bus_name] = std::make_shared<low_can_subscription_t>(low_can_subscription_t());
505 if(type == socket_type::BCM)
507 return low_can_subscription_t::tx_send(*cd[bus_name], cfd, bus_name);
509 else if(type == socket_type::J1939)
511 return low_can_subscription_t::j1939_send(*cd[bus_name], cfd, bus_name);
518 static int send_message(message_t *message, const std::string& bus_name, uint32_t flags)
525 std::map<std::string, std::shared_ptr<low_can_subscription_t> >& cd = application_t::instance().get_can_devices();
527 if( cd.count(bus_name) == 0)
529 cd[bus_name] = std::make_shared<low_can_subscription_t>(low_can_subscription_t());
533 if(flags&BCM_PROTOCOL)
535 return low_can_subscription_t::tx_send(*cd[bus_name], message, bus_name);
537 #ifdef USE_FEATURE_J1939
538 else if(flags&J1939_PROTOCOL)
540 return low_can_subscription_t::j1939_send(*cd[bus_name], message, bus_name);
550 static void write_raw_frame(afb_req_t request, const std::string& bus_name, message_t *message, struct json_object *can_data, uint32_t flags)
553 struct utils::signals_found sf;
555 utils::signals_manager_t::instance().lookup_signals_by_id(message->get_id(), application_t::instance().get_all_signals(), sf.signals);
557 if( !sf.signals.empty() )
559 AFB_DEBUG("ID WRITE RAW : %d",sf.signals[0]->get_message()->get_id());
560 if(flags&BCM_PROTOCOL)
562 if(sf.signals[0]->get_message()->is_fd())
564 AFB_DEBUG("CANFD_MAX_DLEN");
565 message->set_flags(CAN_FD_FRAME);
566 message->set_maxdlen(CANFD_MAX_DLEN);
570 AFB_DEBUG("CAN_MAX_DLEN");
571 message->set_maxdlen(CAN_MAX_DLEN);
575 if((message->get_length()> 0 && (
576 ((flags&BCM_PROTOCOL) && (
577 (message->get_length() <= CANFD_MAX_DLEN * MAX_BCM_CAN_FRAMES && message->get_flags() & CAN_FD_FRAME)
578 || (message->get_length() <= CAN_MAX_DLEN * MAX_BCM_CAN_FRAMES && !(message->get_flags() & CAN_FD_FRAME))
580 #ifdef USE_FEATURE_J1939
581 || (message->get_length() <= J1939_MAX_DLEN && flags&J1939_PROTOCOL)
585 std::vector<uint8_t> data;
586 for (int i = 0 ; i < message->get_length() ; i++)
588 struct json_object *one_can_data = json_object_array_get_idx(can_data, i);
589 data.push_back((json_object_is_type(one_can_data, json_type_int)) ?
590 (uint8_t)json_object_get_int(one_can_data) : 0);
592 message->set_data(data);
596 if(flags&BCM_PROTOCOL)
598 afb_req_fail(request, "Invalid", "Frame BCM");
600 else if(flags&J1939_PROTOCOL)
602 afb_req_fail(request, "Invalid", "Frame J1939");
606 afb_req_fail(request, "Invalid", "Frame");
611 if(! send_message(message, application_t::instance().get_can_bus_manager().get_can_device_name(bus_name),flags))
613 afb_req_success(request, nullptr, "Message correctly sent");
617 afb_req_fail(request, "Error", "sending the message. See the log for more details.");
622 afb_req_fail(request, "Error", "no find id in signals. See the log for more details.");
627 static void write_frame(afb_req_t request, const std::string& bus_name, json_object *json_value)
632 struct json_object *can_data = nullptr;
633 std::vector<uint8_t> data;
635 AFB_DEBUG("JSON content %s",json_object_get_string(json_value));
637 if(!wrap_json_unpack(json_value, "{si, si, so !}",
640 "can_data", &can_data))
642 message = new can_message_t(0,(uint32_t)id,(uint32_t)length,false,0,data,0);
643 write_raw_frame(request,bus_name,message,can_data,BCM_PROTOCOL);
645 #ifdef USE_FEATURE_J1939
646 else if(!wrap_json_unpack(json_value, "{si, si, so !}",
651 message = new j1939_message_t((uint32_t)length,data,0,J1939_NO_NAME,(pgn_t)id,J1939_NO_ADDR);
652 write_raw_frame(request,bus_name,message,can_data,J1939_PROTOCOL);
657 afb_req_fail(request, "Invalid", "Frame object malformed");
663 static void write_signal(afb_req_t request, const std::string& name, json_object *json_value)
665 struct canfd_frame cfd;
666 struct utils::signals_found sf;
667 signal_encoder encoder = nullptr;
670 ::memset(&cfd, 0, sizeof(cfd));
672 openxc_DynamicField search_key = build_DynamicField(name);
673 sf = utils::signals_manager_t::instance().find_signals(search_key);
674 openxc_DynamicField dynafield_value = build_DynamicField(json_value);
676 if (sf.signals.empty())
678 afb_req_fail_f(request, "No signal(s) found for %s. Message not sent.", name.c_str());
682 std::shared_ptr<signal_t>& sig = sf.signals[0];
683 if(! sig->get_writable())
685 afb_req_fail_f(request, "%s isn't writable. Message not sent.", sig->get_name().c_str());
689 uint64_t value = (encoder = sig->get_encoder()) ?
690 encoder(*sig, dynafield_value, &send) :
691 encoder_t::encode_DynamicField(*sig, dynafield_value, &send);
693 uint32_t flags = INVALID_FLAG;
695 if(sig->get_message()->is_j1939())
697 flags = J1939_PROTOCOL;
701 flags = BCM_PROTOCOL;
704 // cfd = encoder_t::build_frame(sig, value);
705 message_t *message = encoder_t::build_message(sig,value,false,false);
707 if(! send_message(message, sig->get_message()->get_bus_device_name(), flags) && send)
709 afb_req_success(request, nullptr, "Message correctly sent");
713 afb_req_fail(request, "Error", "Sending the message. See the log for more details.");
716 if(sig->get_message()->is_j1939())
718 #ifdef USE_FEATURE_J1939
719 delete (j1939_message_t*) message;
724 delete (can_message_t*) message;
728 void write(afb_req_t request)
730 struct json_object* args = nullptr, *json_value = nullptr;
731 const char *name = nullptr;
733 args = afb_req_json(request);
735 // Process about Raw CAN message on CAN bus directly
736 if (args != NULL && ! wrap_json_unpack(args, "{ss, so !}",
738 "frame", &json_value))
739 write_frame(request, name, json_value);
741 // Search signal then encode value.
742 else if(args != NULL &&
743 ! wrap_json_unpack(args, "{ss, so !}",
744 "signal_name", &name,
745 "signal_value", &json_value))
746 write_signal(request, std::string(name), json_value);
748 afb_req_fail(request, "Error", "Request argument malformed");
751 static struct json_object *get_signals_value(const std::string& name)
753 struct utils::signals_found sf;
754 struct json_object *ans = nullptr;
756 openxc_DynamicField search_key = build_DynamicField(name);
757 sf = utils::signals_manager_t::instance().find_signals(search_key);
759 if (sf.signals.empty())
761 AFB_WARNING("No signal(s) found for %s.", name.c_str());
764 ans = json_object_new_array();
765 for(const auto& sig: sf.signals)
767 struct json_object *jobj = json_object_new_object();
768 json_object_object_add(jobj, "event", json_object_new_string(sig->get_name().c_str()));
769 json_object_object_add(jobj, "value", json_object_new_double(sig->get_last_value()));
770 json_object_array_add(ans, jobj);
775 void get(afb_req_t request)
778 struct json_object* args = nullptr,
779 *json_name = nullptr;
780 json_object *ans = nullptr;
782 args = afb_req_json(request);
784 // Process about Raw CAN message on CAN bus directly
785 if (args != nullptr &&
786 (json_object_object_get_ex(args, "event", &json_name) && json_object_is_type(json_name, json_type_string) ))
788 ans = get_signals_value(json_object_get_string(json_name));
794 AFB_ERROR("Request argument malformed. Please use the following syntax:");
799 afb_req_success(request, ans, NULL);
801 afb_req_fail(request, "error", NULL);
805 static struct json_object *list_can_message(const std::string& name)
807 struct utils::signals_found sf;
808 struct json_object *ans = nullptr;
810 openxc_DynamicField search_key = build_DynamicField(name);
811 sf = utils::signals_manager_t::instance().find_signals(search_key);
813 if (sf.signals.empty() && sf.diagnostic_messages.empty())
815 AFB_WARNING("No signal(s) found for %s.", name.c_str());
818 ans = json_object_new_array();
819 for(const auto& sig: sf.signals)
821 json_object_array_add(ans,
822 json_object_new_string(sig->get_name().c_str()));
824 for(const auto& sig: sf.diagnostic_messages)
826 json_object_array_add(ans,
827 json_object_new_string(sig->get_name().c_str()));
833 void list(afb_req_t request)
836 json_object *ans = nullptr;
837 struct json_object* args = nullptr,
838 *json_name = nullptr;
839 args = afb_req_json(request);
841 if ((args != nullptr) &&
842 (json_object_object_get_ex(args, "event", &json_name) && json_object_is_type(json_name, json_type_string)))
844 name = json_object_get_string(json_name);
851 ans = list_can_message(name);
857 afb_req_success(request, ans, NULL);
861 afb_req_fail(request, "error", NULL);
865 /// @brief Initialize the binding.
867 /// @param[in] service Structure which represent the Application Framework Binder.
869 /// @return Exit code, zero if success.
870 int init_binding(afb_api_t api)
873 application_t& application = application_t::instance();
874 can_bus_t& can_bus_manager = application.get_can_bus_manager();
876 can_bus_manager.set_can_devices();
877 can_bus_manager.start_threads();
878 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
880 /// Initialize Diagnostic manager that will handle obd2 requests.
881 /// We pass by default the first CAN bus device to its Initialization.
882 /// TODO: be able to choose the CAN bus device that will be use as Diagnostic bus.
883 if(application_t::instance().get_diagnostic_manager().initialize())
886 // Add a recurring dignostic message request to get engine speed at all times.
887 openxc_DynamicField search_key = build_DynamicField("diagnostic_messages.engine.speed");
888 struct utils::signals_found sf = sm.find_signals(search_key);
890 if(sf.signals.empty() && sf.diagnostic_messages.size() == 1)
892 afb_req_t request = nullptr;
894 struct event_filter_t event_filter;
895 event_filter.frequency = sf.diagnostic_messages.front()->get_frequency();
897 std::map<int, std::shared_ptr<low_can_subscription_t> >& s = sm.get_subscribed_signals();
899 subscribe_unsubscribe_diagnostic_messages(request, true, sf.diagnostic_messages, event_filter, s, true);
903 #ifdef USE_FEATURE_J1939
904 std::vector<std::shared_ptr<message_definition_t>> current_messages_definition = application.get_messages_definition();
905 for(std::shared_ptr<message_definition_t> message_definition: current_messages_definition)
907 if(message_definition->is_j1939())
909 std::shared_ptr<low_can_subscription_t> low_can_j1939 = std::make_shared<low_can_subscription_t>();
911 application.set_subscription_address_claiming(low_can_j1939);
913 ret = low_can_subscription_t::open_socket(*low_can_j1939,
914 message_definition->get_bus_device_name(),
915 J1939_ADDR_CLAIM_PROTOCOL);
918 AFB_ERROR("Error open socket address claiming for j1939 protocol");
922 // std::shared_ptr<low_can_subscription_t> saddrclaim = application.get_subscription_address_claiming();
924 add_to_event_loop(low_can_j1939);
932 AFB_ERROR("There was something wrong with CAN device Initialization.");