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-binding.hpp"
21 /********************************************************************************
25 *********************************************************************************/
27 /********************************************************************************
29 * Subscription and unsubscription
31 *********************************************************************************/
33 static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const CanSignal& sig)
37 // TODO: lock the subscribed_signals when insert/remove
38 const auto& ss_i = subscribed_signals.find(sig.genericName);
39 if (ss_i != subscribed_signals.end())
41 if(!afb_event_is_valid(ss_i->second))
45 NOTICE(interface, "Event isn't valid, it can't be unsubscribed.");
50 ss_i->second = afb_daemon_make_event(interface->daemon, ss_i->first.c_str());
51 if (!afb_event_is_valid(ss_i->second))
53 ERROR(interface, "Can't create an event, something goes wrong.");
61 subscribed_signals[sig.genericName] = afb_daemon_make_event(interface->daemon, sig.genericName);
62 if (!afb_event_is_valid(ss_i->second))
64 ERROR(interface, "Can't create an event, something goes wrong.");
69 if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, subscribed_signals[sig.genericName])) < 0)
71 ERROR(interface, "Operation goes wrong for signal: %s", sig.genericName);
80 static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<CanSignal>& signals)
84 for(const auto& signal_i : signals)
86 ret = subscribe_unsubscribe_signal(request, subscribe, signal_i);
93 static int subscribe_unsubscribe_all(struct afb_req request, bool subscribe)
97 //for (const auto& sig : SIGNALS)
98 // e += !subscribe_unsubscribe_signals(request, subscribe, sig);
99 e += !subscribe_unsubscribe_signals(request, subscribe, SIGNALS[MESSAGE_SET_ID]);
104 static int subscribe_unsubscribe_name(struct afb_req request, bool subscribe, const char *name)
106 std::vector<CanSignal> sig;
109 if (!::strcmp(name, "*"))
110 ret = subscribe_unsubscribe_all(request, subscribe);
113 //if(obd2_handler_c.is_obd2_signal(name))
120 openxc_DynamicField search_key = build_DynamicField(name);
121 sig = find_can_signals(search_key);
125 ret = subscribe_unsubscribe_signals(request, subscribe, sig);
130 static void subscribe_unsubscribe(struct afb_req request, bool subscribe)
133 struct json_object *args, *a, *x;
135 /* makes the subscription/unsubscription */
136 args = afb_req_json(request);
137 if (args == NULL || !json_object_object_get_ex(args, "event", &a)) {
138 ok = subscribe_unsubscribe_all(request, subscribe);
139 } else if (json_object_get_type(a) != json_type_array) {
140 ok = subscribe_unsubscribe_name(request, subscribe, json_object_get_string(a));
142 n = json_object_array_length(a);
144 for (i = 0 ; i < n ; i++) {
145 x = json_object_array_get_idx(a, i);
146 if (subscribe_unsubscribe_name(request, subscribe, json_object_get_string(x)))
152 /* send the report */
154 afb_req_success(request, NULL, NULL);
156 afb_req_fail(request, "error", NULL);
159 static const struct afb_verb_desc_v1 verbs[]=
161 { .name= "subscribe", .session= AFB_SESSION_NONE, .callback= subscribe, .info= "subscribe to notification of CAN bus messages." },
162 { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe, .info= "unsubscribe a previous subscription." }
165 static const struct afb_binding binding_desc {
166 AFB_BINDING_VERSION_1,
176 static void subscribe(struct afb_req request)
178 subscribe_unsubscribe(request, true);
181 static void unsubscribe(struct afb_req request)
183 subscribe_unsubscribe(request, false);
186 const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf)
190 return &binding_desc;
194 * @brief Initialize the binding.
196 * @param[in] service Structure which represent the Application Framework Binder.
198 * @return Exit code, zero if success.
200 int afbBindingV1ServiceInit(struct afb_service service)
203 fd_conf = afb_daemon_rootdir_open_locale(interface->daemon, "can_bus.json", O_RDONLY, NULL);
205 /* Open CAN socket */
206 can_bus_t can_bus_handler(interface, fd_conf);
207 if(can_bus_handler.init_can_dev() == 0)
209 can_bus_handler.start_threads();