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.
20 #include <sys/types.h>
21 #include <sys/socket.h>
22 #include <sys/ioctl.h>
24 #include <linux/can.h>
25 #include <linux/can/raw.h>
27 #include <systemd/sd-event.h>
37 #include <json-c/json.h>
38 #include <openxc.pb.h>
40 #include "low-can-binding.hpp"
41 #include "openxc-utils.hpp"
43 #include "can-utils.hpp"
44 #include "can-signals.hpp"
46 /********************************************************************************
50 *********************************************************************************/
52 /********************************************************************************
54 * Subscription and unsubscription
56 *********************************************************************************/
58 static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const CanSignal& sig)
62 const auto& ss_i = subscribed_signals.find(sig.genericName);
63 if (ss_i != subscribed_signals.end())
65 if(!afb_event_is_valid(ss_i->second))
69 NOTICE(interface, "Event isn't valid, it can't be unsubscribed.");
74 ss_i->second = afb_daemon_make_event(interface->daemon, ss_i->first.c_str());
75 if (!afb_event_is_valid(ss_i->second))
77 ERROR(interface, "Can't create an event, something goes wrong.");
85 subscribed_signals[sig.genericName] = afb_daemon_make_event(interface->daemon, sig.genericName);
86 if (!afb_event_is_valid(ss_i->second))
88 ERROR(interface, "Can't create an event, something goes wrong.");
93 if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, subscribed_signals[sig.genericName])) < 0)
95 ERROR(interface, "Operation goes wrong for signal: %s", sig.genericName);
104 static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<CanSignal>& signals)
108 // TODO: lock the subscribed_signals when insert/remove
109 for(const auto& signal_i : signals)
111 ret = subscribe_unsubscribe_signal(request, subscribe, signal_i);
117 static int subscribe_unsubscribe_all(struct afb_req request, bool subscribe)
121 //for (const auto& sig : SIGNALS)
122 // e += !subscribe_unsubscribe_signals(request, subscribe, sig);
123 e += !subscribe_unsubscribe_signals(request, subscribe, SIGNALS[MESSAGE_SET_ID]);
128 static int subscribe_unsubscribe_name(struct afb_req request, bool subscribe, const char *name)
130 std::vector<CanSignal> sig;
133 if (!::strcmp(name, "*"))
134 ret = subscribe_unsubscribe_all(request, subscribe);
137 //if(obd2_handler_c.is_obd2_signal(name))
144 openxc_DynamicField search_key = build_DynamicField(name);
145 sig = find_can_signals(search_key);
149 ret = subscribe_unsubscribe_signals(request, subscribe, sig);
154 static void subscribe_unsubscribe(struct afb_req request, bool subscribe)
157 struct json_object *args, *a, *x;
159 /* makes the subscription/unsubscription */
160 args = afb_req_json(request);
161 if (args == NULL || !json_object_object_get_ex(args, "event", &a)) {
162 ok = subscribe_unsubscribe_all(request, subscribe);
163 } else if (json_object_get_type(a) != json_type_array) {
164 ok = subscribe_unsubscribe_name(request, subscribe, json_object_get_string(a));
166 n = json_object_array_length(a);
168 for (i = 0 ; i < n ; i++) {
169 x = json_object_array_get_idx(a, i);
170 if (subscribe_unsubscribe_name(request, subscribe, json_object_get_string(x)))
176 /* send the report */
178 afb_req_success(request, NULL, NULL);
180 afb_req_fail(request, "error", NULL);
183 static const struct afb_verb_desc_v1 verbs[]=
185 { .name= "subscribe", .session= AFB_SESSION_NONE, .callback= subscribe, .info= "subscribe to notification of CAN bus messages." },
186 { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe, .info= "unsubscribe a previous subscription." }
189 static const struct afb_binding binding_desc {
190 AFB_BINDING_VERSION_1,
200 static void subscribe(struct afb_req request)
202 subscribe_unsubscribe(request, true);
205 static void unsubscribe(struct afb_req request)
207 subscribe_unsubscribe(request, false);
210 const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf)
214 return &binding_desc;
218 * @brief Initialize the binding.
220 * @param[in] service Structure which represent the Application Framework Binder.
222 * @return Exit code, zero if success.
224 int afbBindingV1ServiceInit(struct afb_service service)
227 fd_conf = afb_daemon_rootdir_open_locale(interface->daemon, "can_bus.json", O_RDONLY, NULL);
229 /* Open CAN socket */
230 can_bus_t can_bus_handler(interface, fd_conf);
231 if(can_bus_handler.init_can_dev() == 0)
233 can_bus_handler.start_threads();