diff options
Diffstat (limited to 'CAN-binder/low-can-binding/binding/low-can-cb.cpp')
| -rw-r--r-- | CAN-binder/low-can-binding/binding/low-can-cb.cpp | 358 |
1 files changed, 0 insertions, 358 deletions
diff --git a/CAN-binder/low-can-binding/binding/low-can-cb.cpp b/CAN-binder/low-can-binding/binding/low-can-cb.cpp deleted file mode 100644 index 97b6d20..0000000 --- a/CAN-binder/low-can-binding/binding/low-can-cb.cpp +++ /dev/null @@ -1,358 +0,0 @@ -/* - * 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-hat.hpp" - -#include <map> -#include <queue> -#include <mutex> -#include <vector> -#include <thread> -#include <json-c/json.h> -#include <systemd/sd-event.h> - -#include "openxc.pb.h" -#include "application.hpp" -#include "../can/can-bus.hpp" -#include "../can/can-signals.hpp" -#include "../can/can-message.hpp" -#include "../utils/signals.hpp" -#include "../diagnostic/diagnostic-message.hpp" -#include "../utils/openxc-utils.hpp" - - -///****************************************************************************** -/// -/// SystemD event loop Callbacks -/// -///*******************************************************************************/ - -void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, uint32_t pid, std::map<int, std::shared_ptr<low_can_subscription_t> >& s) -{ - if( ! can_subscription->get_diagnostic_message().empty() && can_subscription->get_diagnostic_message(pid) != nullptr) - { - DiagnosticRequest diag_req = can_subscription->get_diagnostic_message(pid)->build_diagnostic_request(); - active_diagnostic_request_t* adr = application_t::instance().get_diagnostic_manager().find_recurring_request(diag_req); - if( adr != nullptr) - application_t::instance().get_diagnostic_manager().cleanup_request(adr, true); - } - - on_no_clients(can_subscription, s); -} - -void on_no_clients(std::shared_ptr<low_can_subscription_t> can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s) -{ - auto it = s.find(can_subscription->get_index()); - s.erase(it); -} - -static void push_n_notify(const can_message_t& cm) -{ - can_bus_t& cbm = application_t::instance().get_can_bus_manager(); - { - std::lock_guard<std::mutex> can_message_lock(cbm.get_can_message_mutex()); - cbm.push_new_can_message(cm); - } - cbm.get_new_can_message_cv().notify_one(); -} - -int read_message(sd_event_source *event_source, int fd, uint32_t revents, void *userdata) -{ - low_can_subscription_t* can_subscription = (low_can_subscription_t*)userdata; - if ((revents & EPOLLIN) != 0) - { - can_message_t cm; - utils::socketcan_bcm_t& s = can_subscription->get_socket(); - s >> cm; - - // Sure we got a valid CAN message ? - if(! cm.get_id() == 0 && ! cm.get_length() == 0) - {push_n_notify(cm);} - } - - // check if error or hangup - if ((revents & (EPOLLERR|EPOLLRDHUP|EPOLLHUP)) != 0) - { - sd_event_source_unref(event_source); - can_subscription->get_socket().close(); - } - return 0; -} - -///****************************************************************************** -/// -/// Subscription and unsubscription -/// -///*******************************************************************************/ - -static int make_subscription_unsubscription(struct afb_req request, std::shared_ptr<low_can_subscription_t>& can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s, bool subscribe) -{ - /* Make the subscription or unsubscription to the event */ - if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, s[can_subscription->get_index()]->get_event())) < 0) - { - ERROR("Operation goes wrong for signal: %s", can_subscription->get_name().c_str()); - return -1; - } - return 0; -} - -static int create_event_handle(std::shared_ptr<low_can_subscription_t>& can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s) -{ - int sub_index = can_subscription->get_index(); - can_subscription->set_event(afb_daemon_make_event(can_subscription->get_name().c_str())); - s[sub_index] = can_subscription; - if (!afb_event_is_valid(s[sub_index]->get_event())) - { - ERROR("Can't create an event for %s, something goes wrong.", can_subscription->get_name().c_str()); - return -1; - } - return 0; -} - -/// @brief Will determine if it is needed or not to create the event handle and checks it to be sure that -/// we got a valid afb_event to get subscribe or unsubscribe. Then launch the subscription or unsubscription -/// against the application framework using that event handle. -static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, std::shared_ptr<low_can_subscription_t>& can_subscription, std::map<int, std::shared_ptr<low_can_subscription_t> >& s) -{ - int ret = -1; - int sub_index = can_subscription->get_index(); - - if (can_subscription && s.find(sub_index) != s.end()) - { - if (!afb_event_is_valid(s[sub_index]->get_event()) && !subscribe) - { - NOTICE("Event isn't valid, no need to unsubscribed."); - ret = -1; - } - ret = 0; - } - else - { - /* Event doesn't exist , so let's create it */ - can_subscription->set_event({nullptr, nullptr}); - s[sub_index] = can_subscription; - ret = create_event_handle(can_subscription, 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, can_subscription, s, subscribe); -} - -static int add_to_event_loop(std::shared_ptr<low_can_subscription_t>& can_subscription) -{ - struct sd_event_source* event_source = nullptr; - return ( sd_event_add_io(afb_daemon_get_event_loop(), - &event_source, - can_subscription->get_socket().socket(), - EPOLLIN, - read_message, - can_subscription.get())); -} - -static int subscribe_unsubscribe_diagnostic_messages(struct afb_req request, bool subscribe, std::vector<std::shared_ptr<diagnostic_message_t> > diagnostic_messages, struct event_filter_t& event_filter, std::map<int, std::shared_ptr<low_can_subscription_t> >& s) -{ - int rets = 0; - application_t& app = application_t::instance(); - diagnostic_manager_t& diag_m = app.get_diagnostic_manager(); - - for(const auto& sig : diagnostic_messages) - { - DiagnosticRequest* diag_req = new DiagnosticRequest(sig->build_diagnostic_request()); - event_filter.frequency = std::isnan(event_filter.frequency) ? sig->get_frequency() : event_filter.frequency; - std::shared_ptr<low_can_subscription_t> can_subscription; - - auto it = std::find_if(s.begin(), s.end(), [&sig](std::pair<int, std::shared_ptr<low_can_subscription_t> > sub){ return (! sub.second->get_diagnostic_message().empty());}); - can_subscription = it != s.end() ? - it->second : - std::make_shared<low_can_subscription_t>(low_can_subscription_t(event_filter)); - // If the requested diagnostic message isn't supported by the car then unsubcribe it - // no matter what we want, worse case will be a fail unsubscription but at least we don't - // poll a PID for nothing. - //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); - if(sig->get_supported() && subscribe) - { - diag_m.add_recurring_request(diag_req, sig->get_name().c_str(), false, sig->get_decoder(), sig->get_callback(), event_filter.frequency); - if(can_subscription->create_rx_filter(sig) < 0) - {return -1;} - DEBUG("Signal: %s subscribed", sig->get_name().c_str()); - if(it == s.end() && add_to_event_loop(can_subscription) < 0) - { - diag_m.cleanup_request( - diag_m.find_recurring_request(*diag_req), true); - WARNING("signal: %s isn't supported. Canceling operation.", sig->get_name().c_str()); - return -1; - } - } - else - { - if(sig->get_supported()) - {DEBUG("%s cancelled due to unsubscribe", sig->get_name().c_str());} - else - { - WARNING("signal: %s isn't supported. Canceling operation.", sig->get_name().c_str()); - return -1; - } - } - int ret = subscribe_unsubscribe_signal(request, subscribe, can_subscription, s); - if(ret < 0) - return ret; - - rets++; - } - - return rets; -} - -static int subscribe_unsubscribe_can_signals(struct afb_req request, bool subscribe, std::vector<std::shared_ptr<can_signal_t> > can_signals, struct event_filter_t& event_filter, std::map<int, std::shared_ptr<low_can_subscription_t> >& s) -{ - int rets = 0; - for(const auto& sig: can_signals) - { - auto it = std::find_if(s.begin(), s.end(), [&sig](std::pair<int, std::shared_ptr<low_can_subscription_t> > sub){ return sub.second->get_can_signal() == sig; }); - std::shared_ptr<low_can_subscription_t> can_subscription; - if(it != s.end()) - { - can_subscription = it->second; - } - else - { - can_subscription = std::make_shared<low_can_subscription_t>(low_can_subscription_t(event_filter)); - if(can_subscription->create_rx_filter(sig) < 0) - {return -1;} - if(add_to_event_loop(can_subscription) < 0) - {return -1;} - } - - if(subscribe_unsubscribe_signal(request, subscribe, can_subscription, s) < 0) - {return -1;} - - rets++; - DEBUG("signal: %s subscribed", sig->get_name().c_str()); - } - return rets; -} - -/// -/// @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] signals - struct containing vectors with can_signal_t and diagnostic_messages to subscribe -/// -/// @return Number of correctly subscribed signal -/// -static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const struct utils::signals_found& signals, struct event_filter_t& event_filter) -{ - int rets = 0; - utils::signals_manager_t& sm = utils::signals_manager_t::instance(); - - std::lock_guard<std::mutex> subscribed_signals_lock(sm.get_subscribed_signals_mutex()); - std::map<int, std::shared_ptr<low_can_subscription_t> >& s = sm.get_subscribed_signals(); - - rets += subscribe_unsubscribe_diagnostic_messages(request, subscribe, signals.diagnostic_messages, event_filter, s); - rets += subscribe_unsubscribe_can_signals(request, subscribe, signals.can_signals, event_filter, s); - - return rets; -} - -static int one_subscribe_unsubscribe(struct afb_req request, bool subscribe, const std::string& tag, json_object* args) -{ - int ret = 0; - struct event_filter_t event_filter; - struct json_object *filter, *obj; - struct utils::signals_found sf; - - // computes the filter - if (json_object_object_get_ex(args, "filter", &filter)) - { - if (json_object_object_get_ex(filter, "frequency", &obj) - && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int))) - { - event_filter.frequency = (float)json_object_get_double(obj); - ret += 1; - } - if (json_object_object_get_ex(filter, "min", &obj) - && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int))) - { - event_filter.min = (float)json_object_get_double(obj); - ret += 2; - } - if (json_object_object_get_ex(filter, "max", &obj) - && (json_object_is_type(obj, json_type_double) || json_object_is_type(obj, json_type_int))) - { - event_filter.max = (float)json_object_get_double(obj); - ret += 4; - } - } - - // subscribe or unsubscribe - openxc_DynamicField search_key = build_DynamicField(tag); - sf = utils::signals_manager_t::instance().find_signals(search_key); - if (sf.can_signals.empty() && sf.diagnostic_messages.empty()) - NOTICE("No signal(s) found for %s.", tag.c_str()); - else - ret = subscribe_unsubscribe_signals(request, subscribe, sf, event_filter); - - return ret; -} - -static void do_subscribe_unsubscribe(struct afb_req request, bool subscribe) -{ - int i, n, rc, rc2; - struct json_object *args, *event, *x; - - args = afb_req_json(request); - if (args == NULL || !json_object_object_get_ex(args, "event", &event)) - { - rc = one_subscribe_unsubscribe(request, subscribe, "*", args); - } - else if (json_object_get_type(event) != json_type_array) - { - rc = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(event), args); - } - else - { - rc = 0; - n = json_object_array_length(event); - for (i = 0 ; i < n ; i++) - { - x = json_object_array_get_idx(event, i); - rc2 = one_subscribe_unsubscribe(request, subscribe, json_object_get_string(x), args); - if (rc >= 0) - rc = rc2 >= 0 ? rc + rc2 : rc2; - } - } - - if (rc >= 0) - afb_req_success(request, NULL, NULL); - else - afb_req_fail(request, "error", NULL); -} - -void subscribe(struct afb_req request) -{ - do_subscribe_unsubscribe(request, true); -} - -void unsubscribe(struct afb_req request) -{ - do_subscribe_unsubscribe(request, false); -} |