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author | 2017-04-14 13:24:07 +0200 | |
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committer | 2017-04-14 13:24:07 +0200 | |
commit | 49fe0eec8f17698fc5f86d0abe01777af1fb2b23 (patch) | |
tree | 356cd3e3261934a3fb90786e1789ee4ad001cbe5 /CAN-binder/low-can-binding/low-can-binding.cpp | |
parent | 044ef27d3667a114964549f89c63ab1ea6655877 (diff) |
Change directory architecture to use 2 separated projects.
Each projects, binder and generator, has to be compiled separatly.
CAN-binder will host high and low level binding
CAN-config-generator only the generator used for low level binding.
build.sh script just launch both build in their respective dir.
Change-Id: Ic77932660fcca507b23a631d4e4e790f608880ae
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'CAN-binder/low-can-binding/low-can-binding.cpp')
-rw-r--r-- | CAN-binder/low-can-binding/low-can-binding.cpp | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/CAN-binder/low-can-binding/low-can-binding.cpp b/CAN-binder/low-can-binding/low-can-binding.cpp new file mode 100644 index 0000000..07b3f1e --- /dev/null +++ b/CAN-binder/low-can-binding/low-can-binding.cpp @@ -0,0 +1,279 @@ +/* + * Copyright (C) 2015, 2016 "IoT.bzh" + * Author "Romain Forlot" <romain.forlot@iot.bzh> + * Author "Loic Collignon" <loic.collignon@iot.bzh> + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "low-can-binding.hpp" + +#include <map> +#include <queue> +#include <mutex> +#include <vector> +#include <thread> +#include <time.h> +#include <linux/can.h> +#include <json-c/json.h> + +#include "openxc.pb.h" +#include "configuration.hpp" +#include "can/can-bus.hpp" +#include "can/can-signals.hpp" +#include "can/can-message.hpp" +#include "utils/timer.hpp" +#include "utils/signals.hpp" +#include "diagnostic/diagnostic-message.hpp" +#include "utils/openxc-utils.hpp" + +extern "C" +{ + #include <afb/afb-service-itf.h> +}; + +// Interface between the daemon and the binding +const struct afb_binding_interface *binder_interface; + +void on_no_clients(std::string message) +{ + DiagnosticRequest* diag_req = configuration_t::instance().get_request_from_diagnostic_message(message); + if(diag_req != nullptr) + { + active_diagnostic_request_t* adr = configuration_t::instance().get_diagnostic_manager().find_recurring_request(diag_req); + if( adr != nullptr) + configuration_t::instance().get_diagnostic_manager().cleanup_request(adr, true); + } +} + +///****************************************************************************** +/// +/// Subscription and unsubscription +/// +///*******************************************************************************/ + +static int make_subscription_unsubscription(struct afb_req request, const std::string& sig_name, std::map<std::string, struct afb_event>& s, bool subscribe) +{ + /* Make the subscription or unsubscription to the event */ + if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, s[sig_name])) < 0) + { + ERROR(binder_interface, "make_subscription_unsubscription: Operation goes wrong for signal: %s", sig_name.c_str()); + return 0; + } + return 1; +} + +static int create_event_handle(const std::string& sig_name, std::map<std::string, struct afb_event>& s) +{ + s[sig_name] = afb_daemon_make_event(binder_interface->daemon, sig_name.c_str()); + if (!afb_event_is_valid(s[sig_name])) + { + ERROR(binder_interface, "create_event_handle: Can't create an event for %s, something goes wrong.", sig_name.c_str()); + return 0; + } + return 1; +} + +static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const std::string& sig) +{ + int ret; + + std::lock_guard<std::mutex> subscribed_signals_lock(get_subscribed_signals_mutex()); + std::map<std::string, struct afb_event>& s = get_subscribed_signals(); + if (s.find(sig) != s.end()) + { + if (!afb_event_is_valid(s[sig]) && !subscribe) + { + NOTICE(binder_interface, "subscribe_unsubscribe_signal: Event isn't valid, it can't be unsubscribed."); + ret = -1; + } + /*else + { + // Event it isn't valid annymore, recreate it + ret = create_event_handle(sig, s); + }*/ + } + else + { + /* Event doesn't exist , so let's create it */ + struct afb_event empty_event = {nullptr, nullptr}; + subscribed_signals[sig] = empty_event; + ret = create_event_handle(sig, s); + } + + /* Check whether or not the event handler has been correctly created and + * make the subscription/unsubscription operation is so. + */ + if (ret <= 0) + return ret; + return make_subscription_unsubscription(request, sig, s, subscribe); +} + +/// +/// @fn static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<can_signal_t>& signals) +/// @brief subscribe to all signals in the vector signals +/// +/// @param[in] afb_req request : contain original request use to subscribe or unsubscribe +/// @param[in] subscribe boolean value used to chose between a subscription operation or an unsubscription +/// @param[in] can_signal_t vector with can_signal_t to subscribe +/// +/// @return Number of correctly subscribed signal +/// +static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<std::string>& signals) +{ + int rets = 0; + + //TODO: Implement way to dynamically call the right function no matter + // how much signals types we have. + + for(const std::string& sig : signals) + { + int ret; + if (active_diagnostic_request_t::is_diagnostic_signal(sig)) + { + diagnostic_message_t* diag_msg = configuration_t::instance().get_diagnostic_message(sig); + DiagnosticRequest* diag_req = configuration_t::instance().get_request_from_diagnostic_message(diag_msg); + + // If the requested diagnostic message isn't supported by the car then unssubcribe. + // no matter what we want, worse case will be a fail unsubscription but at least we don't + // poll a PID for nothing. + if(diag_msg->get_supported() && subscribe) + { + float frequency = diag_msg->get_frequency(); + subscribe = configuration_t::instance().get_diagnostic_manager().add_recurring_request( + diag_req, sig.c_str(), false, diag_msg->get_decoder(), diag_msg->get_callback(), (float)frequency); + //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); + } + else + { + configuration_t::instance().get_diagnostic_manager().cleanup_request( + configuration_t::instance().get_diagnostic_manager().find_recurring_request(diag_req), true); + WARNING(binder_interface, "Signal: %s isn't supported. Canceling operation.", sig.c_str()); + return -1; + } + } + + ret = subscribe_unsubscribe_signal(request, subscribe, sig); + if(ret <= 0) + return ret; + rets++; + + DEBUG(binder_interface, "Signal: %s subscribed", sig.c_str()); + } + return rets; +} + +static int subscribe_unsubscribe_name(struct afb_req request, bool subscribe, const char *name) +{ + std::vector<std::string> signals; + int ret = 0; + + openxc_DynamicField search_key = build_DynamicField(std::string(name)); + signals = find_signals(search_key); + if (signals.empty()) + ret = 0; + + ret = subscribe_unsubscribe_signals(request, subscribe, signals); + NOTICE(binder_interface, "Subscribed/unsubscribe correctly to %d/%d signal(s).", ret, (int)signals.size()); + + return ret; +} + +static void subscribe_unsubscribe(struct afb_req request, bool subscribe) +{ + int ok, i, n; + struct json_object *args, *a, *x; + + /* makes the subscription/unsubscription */ + args = afb_req_json(request); + if (args == NULL || !json_object_object_get_ex(args, "event", &a)) { + ok = subscribe_unsubscribe_name(request, subscribe, "*"); + } else if (json_object_get_type(a) != json_type_array) { + ok = subscribe_unsubscribe_name(request, subscribe, json_object_get_string(a)); + } else { + n = json_object_array_length(a); + ok = 0; + for (i = 0 ; i < n ; i++) { + x = json_object_array_get_idx(a, i); + if (subscribe_unsubscribe_name(request, subscribe, json_object_get_string(x))) + ok++; + } + ok = (ok == n); + } + + /* send the report */ + if (ok) + afb_req_success(request, NULL, NULL); + else + afb_req_fail(request, "error", NULL); +} + +extern "C" +{ + static void subscribe(struct afb_req request) + { + subscribe_unsubscribe(request, true); + } + + static void unsubscribe(struct afb_req request) + { + subscribe_unsubscribe(request, false); + } + + static const struct afb_verb_desc_v1 verbs[]= + { + { .name= "subscribe", .session= AFB_SESSION_NONE, .callback= subscribe, .info= "subscribe to notification of CAN bus messages." }, + { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe, .info= "unsubscribe a previous subscription." } + }; + + static const struct afb_binding binding_desc { + AFB_BINDING_VERSION_1, + { + "Low level CAN bus service", + "low-can", + verbs + } + }; + + const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf) + { + binder_interface = itf; + + return &binding_desc; + } + + /// @brief Initialize the binding. + /// + /// @param[in] service Structure which represent the Application Framework Binder. + /// + /// @return Exit code, zero if success. + int afbBindingV1ServiceInit(struct afb_service service) + { + can_bus_t& can_bus_manager = configuration_t::instance().get_can_bus_manager(); + + /// Initialize CAN socket + if(can_bus_manager.init_can_dev() == 0) + { + can_bus_manager.start_threads(); + + /// Initialize Diagnostic manager that will handle obd2 requests. + /// We pass by default the first CAN bus device to its Initialization. + /// TODO: be able to choose the CAN bus device that will be use as Diagnostic bus. + if(configuration_t::instance().get_diagnostic_manager().initialize()) + return 0; + } + + ERROR(binder_interface, "There was something wrong with CAN device Initialization. Check your config file maybe"); + return 1; + } +}; |