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.
30 #include <sys/ioctl.h>
31 #include <linux/can.h>
32 #include <openxc.pb.h>
33 #include <sys/timeb.h>
34 #include <sys/types.h>
35 #include <sys/socket.h>
36 #include <json-c/json.h>
37 #include <linux/can/raw.h>
38 #include <systemd/sd-event.h>
41 #include "openxc.pb.h"
42 #include "can-utils.hpp"
43 #include "can-signals.hpp"
44 #include "can-decoder.hpp"
45 #include "openxc-utils.hpp"
47 #include "low-can-binding.hpp"
51 #include <afb/afb-binding.h>
52 #include <afb/afb-service-itf.h>
56 * Interface between the daemon and the binding
58 const struct afb_binding_interface *binder_interface;
60 /********************************************************************************
64 *********************************************************************************/
66 /********************************************************************************
68 * Subscription and unsubscription
70 *********************************************************************************/
72 static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const CanSignal& sig)
76 // TODO: lock the subscribed_signals when insert/remove
77 const auto& ss_i = subscribed_signals.find(sig.genericName);
78 if (ss_i != subscribed_signals.end())
80 if(!afb_event_is_valid(ss_i->second))
84 NOTICE(binder_interface, "Event isn't valid, it can't be unsubscribed.");
89 ss_i->second = afb_daemon_make_event(binder_interface->daemon, ss_i->first.c_str());
90 if (!afb_event_is_valid(ss_i->second))
92 ERROR(binder_interface, "Can't create an event, something goes wrong.");
100 subscribed_signals[sig.genericName] = afb_daemon_make_event(binder_interface->daemon, sig.genericName);
101 if (!afb_event_is_valid(ss_i->second))
103 ERROR(binder_interface, "Can't create an event, something goes wrong.");
108 if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, subscribed_signals[sig.genericName])) < 0)
110 ERROR(binder_interface, "Operation goes wrong for signal: %s", sig.genericName);
119 static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<CanSignal>& signals)
123 for(const auto& signal_i : signals)
125 ret = subscribe_unsubscribe_signal(request, subscribe, signal_i);
132 static int subscribe_unsubscribe_all(struct afb_req request, bool subscribe)
136 //for (const auto& sig : SIGNALS)
137 // e += !subscribe_unsubscribe_signals(request, subscribe, sig);
138 e += !subscribe_unsubscribe_signals(request, subscribe, getSignals());
143 static int subscribe_unsubscribe_name(struct afb_req request, bool subscribe, const char *name)
145 std::vector<CanSignal> sig;
148 if (!::strcmp(name, "*"))
149 ret = subscribe_unsubscribe_all(request, subscribe);
152 //if(obd2_handler_c.is_obd2_signal(name))
159 openxc_DynamicField search_key = build_DynamicField(name);
160 sig = find_can_signals(binder_interface, search_key);
164 ret = subscribe_unsubscribe_signals(request, subscribe, sig);
169 static void subscribe_unsubscribe(struct afb_req request, bool subscribe)
172 struct json_object *args, *a, *x;
174 /* makes the subscription/unsubscription */
175 args = afb_req_json(request);
176 if (args == NULL || !json_object_object_get_ex(args, "event", &a)) {
177 ok = subscribe_unsubscribe_all(request, subscribe);
178 } else if (json_object_get_type(a) != json_type_array) {
179 ok = subscribe_unsubscribe_name(request, subscribe, json_object_get_string(a));
181 n = json_object_array_length(a);
183 for (i = 0 ; i < n ; i++) {
184 x = json_object_array_get_idx(a, i);
185 if (subscribe_unsubscribe_name(request, subscribe, json_object_get_string(x)))
191 /* send the report */
193 afb_req_success(request, NULL, NULL);
195 afb_req_fail(request, "error", NULL);
198 static const struct afb_verb_desc_v1 verbs[]=
200 { .name= "subscribe", .session= AFB_SESSION_NONE, .callback= subscribe, .info= "subscribe to notification of CAN bus messages." },
201 { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe, .info= "unsubscribe a previous subscription." }
204 static const struct afb_binding binding_desc {
205 AFB_BINDING_VERSION_1,
215 static void subscribe(struct afb_req request)
217 subscribe_unsubscribe(request, true);
220 static void unsubscribe(struct afb_req request)
222 subscribe_unsubscribe(request, false);
225 const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf)
227 binder_interface = itf;
229 return &binding_desc;
233 * @brief Initialize the binding.
235 * @param[in] service Structure which represent the Application Framework Binder.
237 * @return Exit code, zero if success.
239 int afbBindingV1ServiceInit(struct afb_service service)
242 fd_conf = afb_daemon_rootdir_open_locale(binder_interface->daemon, "can_bus.json", O_RDONLY, NULL);
244 /* Open CAN socket */
245 can_bus_t can_bus_handler(binder_interface, fd_conf);
246 if(can_bus_handler.init_can_dev() == 0)
248 can_bus_handler.start_threads();