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 "application.hpp"
31 #include "../can/can-encoder.hpp"
32 #include "../can/can-bus.hpp"
33 #include "../can/can-signals.hpp"
34 #include "../can/can-message.hpp"
35 #include "../utils/signals.hpp"
36 #include "../diagnostic/diagnostic-message.hpp"
37 #include "../utils/openxc-utils.hpp"
40 ///******************************************************************************
42 /// SystemD event loop Callbacks
44 ///*******************************************************************************/
46 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)
48 if( ! can_subscription->get_diagnostic_message().empty() && can_subscription->get_diagnostic_message(pid) != nullptr)
50 DiagnosticRequest diag_req = can_subscription->get_diagnostic_message(pid)->build_diagnostic_request();
51 active_diagnostic_request_t* adr = application_t::instance().get_diagnostic_manager().find_recurring_request(diag_req);
53 application_t::instance().get_diagnostic_manager().cleanup_request(adr, true);
56 on_no_clients(can_subscription, s);
59 void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
61 auto it = s.find(can_subscription->get_index());
65 static void push_n_notify(const can_message_t& cm)
67 can_bus_t& cbm = application_t::instance().get_can_bus_manager();
69 std::lock_guard<std::mutex> can_message_lock(cbm.get_can_message_mutex());
70 cbm.push_new_can_message(cm);
72 cbm.get_new_can_message_cv().notify_one();
75 int read_message(sd_event_source *event_source, int fd, uint32_t revents, void *userdata)
77 low_can_subscription_t* can_subscription = (low_can_subscription_t*)userdata;
78 if ((revents & EPOLLIN) != 0)
81 utils::socketcan_bcm_t& s = can_subscription->get_socket();
84 // Sure we got a valid CAN message ?
85 if(! cm.get_id() == 0 && ! cm.get_length() == 0)
89 // check if error or hangup
90 if ((revents & (EPOLLERR|EPOLLRDHUP|EPOLLHUP)) != 0)
92 sd_event_source_unref(event_source);
93 can_subscription->get_socket().close();
98 ///******************************************************************************
100 /// Subscription and unsubscription
102 ///*******************************************************************************/
104 static int make_subscription_unsubscription(struct afb_req request,
105 std::shared_ptr<low_can_subscription_t>& can_subscription,
106 std::map<int, std::shared_ptr<low_can_subscription_t> >& s,
109 /* Make the subscription or unsubscription to the event */
110 if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, s[can_subscription->get_index()]->get_event())) < 0)
112 AFB_ERROR("Operation goes wrong for signal: %s", can_subscription->get_name().c_str());
118 static int create_event_handle(std::shared_ptr<low_can_subscription_t>& can_subscription,
119 std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
121 int sub_index = can_subscription->get_index();
122 can_subscription->set_event(afb_daemon_make_event(can_subscription->get_name().c_str()));
123 s[sub_index] = can_subscription;
124 if (!afb_event_is_valid(s[sub_index]->get_event()))
126 AFB_ERROR("Can't create an event for %s, something goes wrong.", can_subscription->get_name().c_str());
132 /// @brief Will determine if it is needed or not to create the event handle and checks it to be sure that
133 /// we got a valid afb_event to get subscribe or unsubscribe. Then launch the subscription or unsubscription
134 /// against the application framework using that event handle.
135 static int subscribe_unsubscribe_signal(struct afb_req request,
137 std::shared_ptr<low_can_subscription_t>& can_subscription,
138 std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
141 int sub_index = can_subscription->get_index();
143 if (can_subscription && s.find(sub_index) != s.end())
145 if (!afb_event_is_valid(s[sub_index]->get_event()) && !subscribe)
147 AFB_NOTICE("Event isn't valid, no need to unsubscribed.");
154 /* Event doesn't exist , so let's create it */
155 can_subscription->set_event({nullptr, nullptr});
156 s[sub_index] = can_subscription;
157 ret = create_event_handle(can_subscription, s);
160 // Check whether or not the event handler has been correctly created and
161 // make the subscription/unsubscription operation is so.
164 return make_subscription_unsubscription(request, can_subscription, s, subscribe);
167 static int add_to_event_loop(std::shared_ptr<low_can_subscription_t>& can_subscription)
169 struct sd_event_source* event_source = nullptr;
170 return ( sd_event_add_io(afb_daemon_get_event_loop(),
172 can_subscription->get_socket().socket(),
175 can_subscription.get()));
178 static int subscribe_unsubscribe_diagnostic_messages(struct afb_req request,
180 std::vector<std::shared_ptr<diagnostic_message_t> > diagnostic_messages,
181 struct event_filter_t& event_filter,
182 std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
185 application_t& app = application_t::instance();
186 diagnostic_manager_t& diag_m = app.get_diagnostic_manager();
188 for(const auto& sig : diagnostic_messages)
190 DiagnosticRequest* diag_req = new DiagnosticRequest(sig->build_diagnostic_request());
191 event_filter.frequency = std::isnan(event_filter.frequency) ? sig->get_frequency() : event_filter.frequency;
192 std::shared_ptr<low_can_subscription_t> can_subscription;
194 auto it = std::find_if(s.begin(), s.end(), [&sig](std::pair<int, std::shared_ptr<low_can_subscription_t> > sub){ return (! sub.second->get_diagnostic_message().empty());});
195 can_subscription = it != s.end() ?
197 std::make_shared<low_can_subscription_t>(low_can_subscription_t(event_filter));
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 //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);
202 if(sig->get_supported() && subscribe)
204 diag_m.add_recurring_request(diag_req, sig->get_name().c_str(), false, sig->get_decoder(), sig->get_callback(), event_filter.frequency);
205 if(can_subscription->create_rx_filter(sig) < 0)
207 AFB_DEBUG("Signal: %s subscribed", sig->get_name().c_str());
208 if(it == s.end() && add_to_event_loop(can_subscription) < 0)
210 diag_m.cleanup_request(
211 diag_m.find_recurring_request(*diag_req), true);
212 AFB_WARNING("signal: %s isn't supported. Canceling operation.", sig->get_name().c_str());
218 if(sig->get_supported())
219 {AFB_DEBUG("%s cancelled due to unsubscribe", sig->get_name().c_str());}
222 AFB_WARNING("signal: %s isn't supported. Canceling operation.", sig->get_name().c_str());
226 int ret = subscribe_unsubscribe_signal(request, subscribe, can_subscription, s);
236 // TODO: Create separate subscrition object if event_filter isn't the same.
237 static int subscribe_unsubscribe_can_signals(struct afb_req request,
239 std::vector<std::shared_ptr<can_signal_t> > can_signals,
240 struct event_filter_t& event_filter,
241 std::map<int, std::shared_ptr<low_can_subscription_t> >& s)
244 for(const auto& sig: can_signals)
246 auto it = std::find_if(s.begin(), s.end(), [&sig](std::pair<int, std::shared_ptr<low_can_subscription_t> > sub){ return sub.second->get_can_signal() == sig; });
247 std::shared_ptr<low_can_subscription_t> can_subscription;
250 can_subscription = it->second;
254 can_subscription = std::make_shared<low_can_subscription_t>(low_can_subscription_t(event_filter));
255 if(can_subscription->create_rx_filter(sig) < 0)
257 if(add_to_event_loop(can_subscription) < 0)
261 if(subscribe_unsubscribe_signal(request, subscribe, can_subscription, s) < 0)
265 AFB_DEBUG("signal: %s subscribed", sig->get_name().c_str());
271 /// @brief subscribe to all signals in the vector signals
273 /// @param[in] afb_req request : contain original request use to subscribe or unsubscribe
274 /// @param[in] subscribe boolean value used to chose between a subscription operation or an unsubscription
275 /// @param[in] signals - struct containing vectors with can_signal_t and diagnostic_messages to subscribe
277 /// @return Number of correctly subscribed signal
279 static int subscribe_unsubscribe_signals(struct afb_req request,
281 const struct utils::signals_found& signals,
282 struct event_filter_t& event_filter)
285 utils::signals_manager_t& sm = utils::signals_manager_t::instance();
287 std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex());
288 std::map<int, std::shared_ptr<low_can_subscription_t> >& s = sm.get_subscribed_signals();
290 rets += subscribe_unsubscribe_diagnostic_messages(request, subscribe, signals.diagnostic_messages, event_filter, s);
291 rets += subscribe_unsubscribe_can_signals(request, subscribe, signals.can_signals, event_filter, s);
296 static int one_subscribe_unsubscribe(struct afb_req request,
298 const std::string& tag,
302 struct event_filter_t event_filter;
303 struct json_object *filter, *obj;
304 struct utils::signals_found sf;
306 // computes the filter
307 if (json_object_object_get_ex(args, "filter", &filter))
309 if (json_object_object_get_ex(filter, "frequency", &obj)
310 && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int)))
312 event_filter.frequency = (float)json_object_get_double(obj);
315 if (json_object_object_get_ex(filter, "min", &obj)
316 && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int)))
318 event_filter.min = (float)json_object_get_double(obj);
321 if (json_object_object_get_ex(filter, "max", &obj)
322 && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int)))
324 event_filter.max = (float)json_object_get_double(obj);
329 // subscribe or unsubscribe
330 openxc_DynamicField search_key = build_DynamicField(tag);
331 sf = utils::signals_manager_t::instance().find_signals(search_key);
332 if (sf.can_signals.empty() && sf.diagnostic_messages.empty())
334 AFB_NOTICE("No signal(s) found for %s.", tag.c_str());
338 {ret = subscribe_unsubscribe_signals(request, subscribe, sf, event_filter);}
343 static void do_subscribe_unsubscribe(struct afb_req request, bool subscribe)
346 struct json_object *args, *event, *x;
348 args = afb_req_json(request);
349 if (args == NULL || !json_object_object_get_ex(args, "event", &event))
351 rc = one_subscribe_unsubscribe(request, subscribe, "*", args);
353 else if (json_object_get_type(event) != json_type_array)
355 rc = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(event), args);
360 n = json_object_array_length(event);
361 for (i = 0 ; i < n ; i++)
363 x = json_object_array_get_idx(event, i);
364 rc2 = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(x), args);
366 rc = rc2 >= 0 ? rc + rc2 : rc2;
371 afb_req_success(request, NULL, NULL);
373 afb_req_fail(request, "error", NULL);
376 void auth(struct afb_req request)
378 afb_req_session_set_LOA(request, 1);
379 afb_req_success(request, NULL, NULL);
382 void subscribe(struct afb_req request)
384 do_subscribe_unsubscribe(request, true);
387 void unsubscribe(struct afb_req request)
389 do_subscribe_unsubscribe(request, false);
392 static int send_frame(const std::string& bus_name, const struct can_frame& cf)
394 std::map<std::string, std::shared_ptr<low_can_socket_t> >& cd = application_t::instance().get_can_devices();
396 if( cd.count(bus_name) == 0)
397 {cd[bus_name] = std::make_shared<low_can_socket_t>(low_can_socket_t());}
399 return cd[bus_name]->tx_send(cf, bus_name);
402 static int write_raw_frame(const std::string& bus_name, uint32_t can_id, uint8_t can_dlc, struct json_object* can_data)
407 ::memset(&cf, 0, sizeof(cf));
410 cf.can_dlc = can_dlc;
412 struct json_object *x;
413 int n = json_object_array_length(can_data);
416 for (int i = 0 ; i < n ; i++)
418 x = json_object_array_get_idx(can_data, i);
419 cf.data[i] = json_object_get_type(x) == json_type_int ? (uint8_t)json_object_get_int(x) : 0;
423 const std::string found_device = application_t::instance().get_can_bus_manager().get_can_device_name(bus_name);
424 if( ! found_device.empty())
426 rc = send_frame(found_device, cf);
431 static int write_signal(const std::string& name, uint64_t value)
435 struct utils::signals_found sf;
437 ::memset(&cf, 0, sizeof(cf));
439 openxc_DynamicField search_key = build_DynamicField(name);
440 sf = utils::signals_manager_t::instance().find_signals(search_key);
442 if (sf.can_signals.empty())
444 AFB_WARNING("No signal(s) found for %s. Message not sent.", name.c_str());
449 for(const auto& sig: sf.can_signals)
451 if(sig->get_writable())
453 cf = encoder_t::build_frame(sig, value);
454 const std::string bus_name = sig->get_message()->get_bus_name();
455 rc = send_frame(bus_name, cf);
458 {AFB_NOTICE("%s isn't writable. Message not sent.", sig->get_name().c_str());}
465 void write(struct afb_req request)
468 struct json_object* args = nullptr,
469 *json_name = nullptr,
470 *json_value = nullptr;
472 args = afb_req_json(request);
474 // Process about Raw CAN message on CAN bus directly
476 (json_object_object_get_ex(args, "bus_name", &json_name) && json_object_is_type(json_name, json_type_string) ) &&
477 (json_object_object_get_ex(args, "frame", &json_value) && json_object_is_type(json_value, json_type_object) ))
479 struct json_object* json_can_id = nullptr,
480 *json_can_dlc = nullptr,
481 *json_can_data = nullptr;
483 if( (json_object_object_get_ex(json_value, "can_id", &json_can_id) && (json_object_is_type(json_can_id, json_type_double) || json_object_is_type(json_can_id, json_type_int))) &&
484 (json_object_object_get_ex(json_value, "can_dlc", &json_can_dlc) && (json_object_is_type(json_can_dlc, json_type_double) || json_object_is_type(json_can_dlc, json_type_int))) &&
485 (json_object_object_get_ex(json_value, "can_data", &json_can_data) && json_object_is_type(json_can_data, json_type_array) ))
487 write_raw_frame(json_object_get_string(json_name),
488 json_object_get_int(json_can_id),
489 (uint8_t)json_object_get_int(json_can_dlc),
494 AFB_ERROR("Frame object malformed (must be \n \"frame\": {\"can_id\": int, \"can_dlc\": int, \"can_data\": [ int, int , int, int ,int , int ,int ,int]}");
498 // Search signal then encode value.
499 else if(args != NULL &&
500 (json_object_object_get_ex(args, "signal_name", &json_name) && json_object_is_type(json_name, json_type_string)) &&
501 (json_object_object_get_ex(args, "signal_value", &json_value) && (json_object_is_type(json_value, json_type_double) || json_object_is_type(json_value, json_type_int))))
503 write_signal(json_object_get_string(json_name),
504 (uint64_t)json_object_get_double(json_value));
508 AFB_ERROR("Request argument malformed. Please use the following syntax:");
513 afb_req_success(request, NULL, NULL);
515 afb_req_fail(request, "error", NULL);