+
+void low_can_subscription_t::set_index(int index)
+{
+ index_ = index;
+}
+
+void low_can_subscription_t::set_signal(std::shared_ptr<signal_t> signal)
+{
+ signal_ = signal;
+}
+
+
+/// @brief Based upon which object is a subscribed CAN signal or diagnostic message
+/// it will open the socket with the required CAN bus device name.
+///
+/// @return INVALID_SOCKET on failure, else positive integer
+int low_can_subscription_t::open_socket(low_can_subscription_t &subscription, const std::string& bus_name, uint32_t flags)
+{
+ int ret = -1;
+ if(! subscription.socket_)
+ {
+ if(flags&BCM_PROTOCOL)
+ {
+ if( subscription.signal_ != nullptr)
+ {
+ subscription.socket_ = std::make_shared<utils::socketcan_bcm_t>();
+ ret = subscription.socket_->open(subscription.signal_->get_message()->get_bus_device_name());
+ }
+ else if (! subscription.diagnostic_message_ .empty())
+ {
+ subscription.socket_ = std::make_shared<utils::socketcan_bcm_t>();
+ ret = subscription.socket_->open(application_t::instance().get_diagnostic_manager().get_bus_device_name());
+ }
+ else if ( !bus_name.empty())
+ {
+ subscription.socket_ = std::make_shared<utils::socketcan_bcm_t>();
+ ret = subscription.socket_->open(bus_name);
+ }
+ subscription.index_ = (int)subscription.socket_->socket();
+ }
+#ifdef USE_FEATURE_ISOTP
+ else if(flags&ISOTP_PROTOCOL)
+ {
+ if(subscription.signal_ != nullptr)
+ {
+ canid_t rx = NO_CAN_ID;
+ canid_t tx = NO_CAN_ID;
+ if(flags&ISOTP_SEND)
+ {
+ rx = subscription.get_rx_id();
+ tx = subscription.signal_->get_message()->get_id();
+ }
+ else if(flags&ISOTP_RECEIVE)
+ {
+ rx = subscription.signal_->get_message()->get_id();
+ tx = subscription.get_tx_id();
+ }
+ std::shared_ptr<utils::socketcan_isotp_t> socket = std::make_shared<utils::socketcan_isotp_t>();
+ ret = socket->open(subscription.signal_->get_message()->get_bus_device_name(),rx,tx);
+ subscription.socket_ = socket;
+ }
+ else if(!bus_name.empty())
+ {
+ std::shared_ptr<utils::socketcan_isotp_t> socket = std::make_shared<utils::socketcan_isotp_t>();
+ ret = socket->open(bus_name, subscription.get_rx_id(),subscription.get_tx_id());
+ subscription.socket_ = socket;
+ }
+ subscription.index_ = (int)subscription.socket_->socket();
+ }
+#endif
+#ifdef USE_FEATURE_J1939
+ else if(flags&J1939_ADDR_CLAIM_PROTOCOL)
+ {
+ pgn_t pgn = J1939_NO_PGN;
+ if(!bus_name.empty())
+ {
+ std::shared_ptr<utils::socketcan_j1939_addressclaiming_t> socket = std::make_shared<utils::socketcan_j1939_addressclaiming_t>();
+ ret = socket->open(bus_name, pgn);
+ subscription.socket_ = socket;
+ }
+ subscription.index_ = (int)subscription.socket_->socket();
+ }
+ else if(flags&J1939_PROTOCOL)
+ {
+ pgn_t pgn = J1939_NO_PGN;
+ if(subscription.signal_ != nullptr)
+ {
+ pgn = subscription.signal_->get_message()->get_id();
+ std::shared_ptr<utils::socketcan_j1939_data_t> socket = std::make_shared<utils::socketcan_j1939_data_t>();
+ ret = socket->open(subscription.signal_->get_message()->get_bus_device_name(), pgn);
+ subscription.socket_ = socket;
+ }
+ else if(!bus_name.empty())
+ {
+ std::shared_ptr<utils::socketcan_j1939_data_t> socket = std::make_shared<utils::socketcan_j1939_data_t>();
+ ret = socket->open(bus_name, pgn);
+ subscription.socket_ = socket;
+ }
+ subscription.index_ = (int)subscription.socket_->socket();
+ }
+#endif
+ else
+ {
+ AFB_ERROR("Socket format not supported");
+ return INVALID_SOCKET;
+ }
+ }
+ else{
+ ret = subscription.socket_->socket();
+ }
+ return ret;
+}
+
+
+/// @brief Builds a BCM message head but doesn't set can_frame.
+///
+/// @returns a bcm_msg with the msg_head parts set and can_frame
+/// zeroed.
+struct bcm_msg low_can_subscription_t::make_bcm_head(uint32_t opcode, uint32_t can_id, uint32_t flags, const struct timeval& timeout, const struct timeval& frequency_thinning)
+{
+ struct bcm_msg bcm_msg;
+ ::memset(&bcm_msg, 0, sizeof(bcm_msg));
+
+ bcm_msg.msg_head.opcode = opcode;
+ bcm_msg.msg_head.can_id = can_id;
+ bcm_msg.msg_head.flags = flags;
+ bcm_msg.msg_head.ival1.tv_sec = timeout.tv_sec ;
+ bcm_msg.msg_head.ival1.tv_usec = timeout.tv_usec;
+ bcm_msg.msg_head.ival2.tv_sec = frequency_thinning.tv_sec ;
+ bcm_msg.msg_head.ival2.tv_usec = frequency_thinning.tv_usec;
+
+
+ return bcm_msg;
+}
+
+/// @brief Take an existing bcm_msg struct and add a can_frame.
+/// Currently only 1 uniq can_frame can be added, it's not possible to build
+/// a multiplexed message with several can_frame.
+void low_can_subscription_t::add_one_bcm_frame(struct canfd_frame& cfd, struct bcm_msg& bcm_msg)
+{
+ struct can_frame cf;
+
+ if (bcm_msg.msg_head.flags & CAN_FD_FRAME)
+ bcm_msg.fd_frames[bcm_msg.msg_head.nframes] = cfd;
+ else
+ {
+ cf.can_id = cfd.can_id;
+ cf.can_dlc = cfd.len;
+ ::memcpy(&cf.data, cfd.data, cfd.len);
+ bcm_msg.frames[bcm_msg.msg_head.nframes] = cf;
+ }
+ bcm_msg.msg_head.nframes++;
+}
+
+/// @brief Take an existing bcm_msg struct and add a can_frame.
+/// Currently only 1 uniq can_frame can be added, it's not possible to build
+/// a multiplexed message with several can_frame.
+void low_can_subscription_t::remove_last_bcm_frame(struct bcm_msg& bcm_msg)
+{
+ struct canfd_frame cf;
+ memset(&cf,0,sizeof(cf));
+ bcm_msg.fd_frames[bcm_msg.msg_head.nframes] = cf;
+ bcm_msg.msg_head.nframes--;
+}
+
+#ifdef USE_FEATURE_J1939
+int low_can_subscription_t::create_rx_filter_j1939(low_can_subscription_t &subscription, std::shared_ptr<signal_t> sig)
+{
+ subscription.signal_= sig;
+
+ // Make sure that socket is opened.
+ if(open_socket(subscription,"",J1939_PROTOCOL) < 0)
+ {
+ return -1;
+ }
+ return 0;
+}
+#endif
+
+int low_can_subscription_t::create_rx_filter_isotp(low_can_subscription_t &subscription, std::shared_ptr<signal_t> sig)
+{
+ subscription.signal_= sig;
+
+ // Make sure that socket is opened.
+ if(open_socket(subscription,"",ISOTP_PROTOCOL|ISOTP_RECEIVE) < 0)
+ {
+ return -1;
+ }
+ return 0;
+}
+
+/// @brief Create a RX_SETUP receive job to be used by the BCM socket for a CAN signal
+/// subscription
+///
+/// @return 0 if ok else -1
+int low_can_subscription_t::create_rx_filter_can(low_can_subscription_t &subscription, std::shared_ptr<signal_t> sig)
+{
+ uint32_t flags_bcm;
+ float val;
+ struct timeval freq, timeout = {0, 0};
+ struct canfd_frame cfd;
+ subscription.signal_= sig;
+ bool is_fd = sig->get_message()->is_fd();
+
+ std::vector<uint8_t> data;
+ uint32_t length_msg = sig->get_message()->get_length();
+
+ if(length_msg == 0)
+ {
+ AFB_ERROR("Error in the length of message with id %d",sig->get_message()->get_id());
+ return -1;
+ }
+
+ for(int i = 0; i<length_msg;i++)
+ {
+ data.push_back(0);
+ }
+
+ encoder_t::encode_data(subscription.signal_,data,true,false,true);
+
+ can_message_t cm;
+
+ if (is_fd)
+ {
+ flags_bcm = SETTIMER|RX_NO_AUTOTIMER|CAN_FD_FRAME;
+ cfd.len = CANFD_MAX_DLEN;
+ cm = can_message_t( CANFD_MAX_DLEN,
+ sig->get_message()->get_id(),
+ length_msg,
+ false,
+ sig->get_message()->get_flags(),
+ data,
+ 0);
+ }
+ else
+ {
+ flags_bcm = SETTIMER|RX_NO_AUTOTIMER;
+ cfd.len = CAN_MAX_DLEN;
+ cm = can_message_t( CAN_MAX_DLEN,
+ sig->get_message()->get_id(),
+ length_msg,
+ false,
+ sig->get_message()->get_flags(),
+ data,
+ 0);
+ }
+
+ frequency_clock_t f = subscription.event_filter_.frequency == 0 ? subscription.signal_->get_frequency() : frequency_clock_t(subscription.event_filter_.frequency);
+ freq = f.get_timeval_from_period();
+
+ struct bcm_msg bcm_msg = subscription.make_bcm_head(RX_SETUP, subscription.signal_->get_message()->get_id(), flags_bcm, timeout, freq);
+
+ std::vector<canfd_frame> cfd_vect = cm.convert_to_canfd_frame_vector();
+
+ if(cfd_vect.size() > 1) //multi
+ {
+ AFB_ERROR("Not implemented yet");
+ return -1;
+ }
+ else if(cfd_vect.size() == 1)
+ {
+ canfd_frame cf = cfd_vect[0];
+ for(int i=0;i<cfd.len;i++)
+ {
+ cfd.data[i] = cf.data[i];
+ }
+ subscription.add_one_bcm_frame(cfd, bcm_msg);
+ }
+ else
+ {
+ AFB_ERROR("No data available");
+ return -1;
+ }
+
+ return create_rx_filter_bcm(subscription, bcm_msg);
+}
+
+int low_can_subscription_t::create_rx_filter(std::shared_ptr<signal_t> sig)
+{
+ if(!sig->get_message()->is_isotp() && !sig->get_message()->is_j1939())
+ {
+ return low_can_subscription_t::create_rx_filter_can(*this, sig);
+ }
+#ifdef USE_FEATURE_ISOTP
+ else if(sig->get_message()->is_isotp())
+ {
+ return low_can_subscription_t::create_rx_filter_isotp(*this,sig);
+ }
+#endif
+#ifdef USE_FEATURE_J1939
+ else if(sig->get_message()->is_j1939())
+ {
+ return low_can_subscription_t::create_rx_filter_j1939(*this, sig);
+ }
+#endif
+ else
+ {
+ AFB_ERROR("Signal can't be j1939 and isotp");
+ return -1;
+ }
+}
+
+
+/// @brief Create a RX_SETUP receive job to be used by the BCM socket for a
+/// diagnostic message subscription.
+///
+/// @return 0 if ok else -1
+int low_can_subscription_t::create_rx_filter(std::shared_ptr<diagnostic_message_t> sig)
+{
+ diagnostic_message_.push_back(sig);
+
+ struct timeval freq = frequency_clock_t(event_filter_.frequency).get_timeval_from_period();
+ //struct timeval timeout = frequency_clock_t(10).get_timeval_from_period();
+ struct timeval timeout = {0,0};
+
+ struct bcm_msg bcm_msg = make_bcm_head(RX_SETUP, OBD2_FUNCTIONAL_BROADCAST_ID, SETTIMER|RX_NO_AUTOTIMER|RX_FILTER_ID, timeout, freq);
+ return create_rx_filter_bcm(*this, bcm_msg);
+}
+
+/// @brief Create a RX_SETUP receive job used by the BCM socket directly from
+/// a bcm_msg. The method should not be used directly but rather through the
+/// two previous method with signal_t or diagnostic_message_t object.
+///
+/// If the CAN arbitration ID is the OBD2 functional broadcast id the subscribed
+/// to the 8 classics OBD2 functional response ID
+///
+/// @return 0 if ok else -1
+int low_can_subscription_t::create_rx_filter_bcm(low_can_subscription_t &subscription, struct bcm_msg& bcm_msg)
+{
+ // Make sure that socket is opened.
+ if(subscription.open_socket(subscription,"",BCM_PROTOCOL) < 0)
+ {return -1;}
+
+ // If it's not an OBD2 CAN ID then just add a simple RX_SETUP job
+ // else monitor all standard 8 CAN OBD2 ID response.
+
+ can_message_t msg = can_message_t();
+
+ msg.set_bcm_msg(bcm_msg);
+
+ if(bcm_msg.msg_head.can_id != OBD2_FUNCTIONAL_BROADCAST_ID)
+ {
+ subscription.socket_->write_message(msg);
+ if(! subscription.socket_)
+ return -1;
+ }
+ else
+ {
+ for(uint8_t i = 0; i < 8; i++)
+ {
+ bcm_msg.msg_head.can_id = OBD2_FUNCTIONAL_RESPONSE_START + i;
+ msg.set_bcm_msg(bcm_msg);
+ subscription.socket_->write_message(msg);
+ if(! subscription.socket_)
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/// @brief Creates a TX_SEND job that is used by the BCM socket to
+/// send a message
+///
+/// @return 0 if ok else -1
+int low_can_subscription_t::tx_send(low_can_subscription_t &subscription, message_t *message, const std::string& bus_name)
+{
+ can_message_t *cm = static_cast<can_message_t*>(message);
+
+ struct bcm_msg bcm_msg = subscription.make_bcm_head(TX_SEND, cm->get_id(),cm->get_flags()|TX_CP_CAN_ID); // TX_CP_CAN_ID -> copy in cfd the id of bcm
+ cm->set_bcm_msg(bcm_msg);
+
+ std::vector<canfd_frame> cfd_vect = cm->convert_to_canfd_frame_vector();
+
+ if(subscription.open_socket(subscription, bus_name, BCM_PROTOCOL) < 0)
+ {
+ return -1;
+ }
+
+ struct bcm_msg &bcm_cm = cm->get_bcm_msg();
+
+
+
+ if(cfd_vect.size() > 1)
+ {
+ AFB_ERROR("Multi frame BCM not implemented");
+ return -1;
+ }
+ else if(cfd_vect.size() == 1) // raw or fd
+ {
+ subscription.add_one_bcm_frame(cfd_vect[0], bcm_cm);
+
+ if(subscription.socket_->write_message(*cm) < 0)
+ {
+ AFB_ERROR("Error write message id : %d",cfd_vect[0].can_id);
+ return -1;
+ }
+ }
+ else // error
+ {
+ AFB_ERROR("Error no data available");
+ return -1;
+ }
+
+ if(! subscription.socket_.get())
+ {
+ return -1;
+ }
+
+ return 0;
+}
+
+#ifdef USE_FEATURE_J1939
+int low_can_subscription_t::j1939_send(low_can_subscription_t &subscription, message_t *message, const std::string& bus_name)
+{
+ //struct bcm_msg bcm_msg = subscription.make_bcm_head(TX_SEND, cfd.can_id);
+ //subscription.add_one_bcm_frame(cfd, bcm_msg);
+
+ if(subscription.open_socket(subscription, bus_name, J1939_PROTOCOL) < 0)
+ {
+ return -1;
+ }
+
+ j1939_message_t *jm = static_cast<j1939_message_t*>(message);
+ jm->set_sockname(jm->get_pgn(),J1939_NO_NAME,J1939_NO_ADDR);
+ if(subscription.socket_->write_message(*jm) < 0)
+ {
+ AFB_ERROR("Error write j1939 message");
+ return -1;
+ }
+
+ return 0;
+}
+#endif
+
+
+int low_can_subscription_t::isotp_send(low_can_subscription_t &subscription, message_t *message, const std::string& bus_name)
+{
+ //struct bcm_msg bcm_msg = subscription.make_bcm_head(TX_SEND, cfd.can_id);
+ //subscription.add_one_bcm_frame(cfd, bcm_msg);
+
+ if(subscription.open_socket(subscription, bus_name, ISOTP_PROTOCOL|ISOTP_SEND) < 0)
+ {
+ return -1;
+ }
+
+ can_message_t *cm = static_cast<can_message_t*>(message);
+ if(subscription.socket_->write_message(*cm) < 0)
+ {
+ AFB_ERROR("Error write iso tp message");
+ return -1;
+ }
+
+ return 0;
+}
\ No newline at end of file