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 <json-c/json.h>
20 #include <systemd/sd-event.h>
22 #include "can-utils.hpp"
23 #include "can-signals.hpp"
24 #include "openxc-utils.hpp"
26 #include "low-can-binding.hpp"
30 #include <afb/afb-binding.h>
31 #include <afb/afb-service-itf.h>
35 * Interface between the daemon and the binding
37 const struct afb_binding_interface *binder_interface;
39 /********************************************************************************
43 *********************************************************************************/
45 /********************************************************************************
47 * Subscription and unsubscription
49 *********************************************************************************/
51 static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const CanSignal& sig)
55 // TODO: lock the subscribed_signals when insert/remove
56 const auto& ss_i = subscribed_signals.find(sig.genericName);
57 if (ss_i != subscribed_signals.end())
59 if(!afb_event_is_valid(ss_i->second))
63 NOTICE(binder_interface, "Event isn't valid, it can't be unsubscribed.");
68 ss_i->second = afb_daemon_make_event(binder_interface->daemon, ss_i->first.c_str());
69 if (!afb_event_is_valid(ss_i->second))
71 ERROR(binder_interface, "Can't create an event, something goes wrong.");
79 subscribed_signals[sig.genericName] = afb_daemon_make_event(binder_interface->daemon, sig.genericName);
80 if (!afb_event_is_valid(ss_i->second))
82 ERROR(binder_interface, "Can't create an event, something goes wrong.");
87 if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, subscribed_signals[sig.genericName])) < 0)
89 ERROR(binder_interface, "Operation goes wrong for signal: %s", sig.genericName);
98 static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<CanSignal>& signals)
102 for(const auto& signal_i : signals)
104 ret = subscribe_unsubscribe_signal(request, subscribe, signal_i);
111 static int subscribe_unsubscribe_all(struct afb_req request, bool subscribe)
115 //for (const auto& sig : SIGNALS)
116 // e += !subscribe_unsubscribe_signals(request, subscribe, sig);
117 e += !subscribe_unsubscribe_signals(request, subscribe, getSignals());
122 static int subscribe_unsubscribe_name(struct afb_req request, bool subscribe, const char *name)
124 std::vector<CanSignal> sig;
127 if (!::strcmp(name, "*"))
128 ret = subscribe_unsubscribe_all(request, subscribe);
131 //if(obd2_handler_c.is_obd2_signal(name))
138 openxc_DynamicField search_key = build_DynamicField(name);
139 sig = find_can_signals(binder_interface, search_key);
143 ret = subscribe_unsubscribe_signals(request, subscribe, sig);
148 static void subscribe_unsubscribe(struct afb_req request, bool subscribe)
151 struct json_object *args, *a, *x;
153 /* makes the subscription/unsubscription */
154 args = afb_req_json(request);
155 if (args == NULL || !json_object_object_get_ex(args, "event", &a)) {
156 ok = subscribe_unsubscribe_all(request, subscribe);
157 } else if (json_object_get_type(a) != json_type_array) {
158 ok = subscribe_unsubscribe_name(request, subscribe, json_object_get_string(a));
160 n = json_object_array_length(a);
162 for (i = 0 ; i < n ; i++) {
163 x = json_object_array_get_idx(a, i);
164 if (subscribe_unsubscribe_name(request, subscribe, json_object_get_string(x)))
170 /* send the report */
172 afb_req_success(request, NULL, NULL);
174 afb_req_fail(request, "error", NULL);
179 static void subscribe(struct afb_req request)
181 subscribe_unsubscribe(request, true);
184 static void unsubscribe(struct afb_req request)
186 subscribe_unsubscribe(request, false);
189 static const struct afb_verb_desc_v1 verbs[]=
191 { .name= "subscribe", .session= AFB_SESSION_NONE, .callback= subscribe, .info= "subscribe to notification of CAN bus messages." },
192 { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe, .info= "unsubscribe a previous subscription." }
195 static const struct afb_binding binding_desc {
196 AFB_BINDING_VERSION_1,
204 const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf)
206 binder_interface = itf;
208 return &binding_desc;
212 * @brief Initialize the binding.
214 * @param[in] service Structure which represent the Application Framework Binder.
216 * @return Exit code, zero if success.
218 int afbBindingV1ServiceInit(struct afb_service service)
221 fd_conf = afb_daemon_rootdir_open_locale(binder_interface->daemon, "can_bus.json", O_RDONLY, NULL);
223 /* Open CAN socket */
224 can_bus_t can_bus_handler(binder_interface, fd_conf);
225 if(can_bus_handler.init_can_dev() == 0)
227 can_bus_handler.start_threads();