C++ meta_message_ptr::destination方法代码示例

/**
 * Send message to a local entity. If the output message destination is a peer
 * MIHF redirect it to the message_out module.
 *
 * @param msg The output message.
 */
void transmit::operator()(meta_message_ptr& msg)
{
	// TODO: remove try catch
	try{
		// FIXME: Response shouldn't be send to MIH Users
		if(msg->opcode() != mih::operation::request) {
			user_entry user = _user_abook.get(msg->destination().to_string());
			if(msg->opcode() == mih::operation::response) {
				msg->opcode(mih::operation::confirm);
			}
			utils::udp_send(_io, msg, user.ip.c_str(), user.port, _port);
			ODTONE_LOG(1, "(transmit) sending local message to: ",
			    msg->destination().to_string(), " : ", user.ip, " : ", user.port);
		}
		else {
			link_entry link = _link_abook.get(msg->destination().to_string());
			utils::udp_send(_io, msg, link.ip.c_str(), link.port, _port);
			ODTONE_LOG(1, "(transmit) sending local message to: ",
			    msg->destination().to_string(), " : ", link.ip, " : ", link.port);
		}
	} catch (...) {
		if(msg->opcode() == mih::operation::confirm) {
			msg->opcode(mih::operation::response);
		}
		ODTONE_LOG(1, "(transmit) forwarding to message_out");
		_msg_out(msg);
	}
}

/**
 * Asks for the capabilities of all local Link SAPs.
 *
 * @param in The input message.
 * @param out The output message.
 * @return Always false, because it does not send any response directly.
 */
bool service_management::link_capability_discover_request(meta_message_ptr &in,
														  meta_message_ptr &out)
{
	// Asks for local Link SAPs capabilities
	ODTONE_LOG(1, "(mism) gathering information about local Link SAPs capabilities");

	*out << mih::request(mih::request::capability_discover);
	out->tid(in->tid());
	out->destination(in->source());

	// Check if the Link SAP is still active
	uint16 fails = _link_abook.fail(out->destination().to_string());
	if(fails > kConf_MIHF_Link_Delete_Value) {
		mih::octet_string dst = out->destination().to_string();
		_link_abook.inactive(dst);

		// Update MIHF capabilities
		utils::update_local_capabilities(_abook, _link_abook, _user_abook);
	}
	else {
		ODTONE_LOG(1, "(mics) forwarding Link_Capability_Discover.request to ",
			out->destination().to_string());
		utils::forward_request(out, _lpool, _transmit);
	}

	return false;
}

/**
 * Checks, in the transaction pool, if the outgoing message belongs to a pending
 * transaction. If true it runs the transaction, otherwise it creates a new
 * transaction.
 *
 * @param out The output message.
 */
void message_out::operator()(meta_message_ptr& out)
{
	out->ackreq(true);	// FIXME: read from config file

	if (out->opcode() == mih::operation::response) {
		dst_transaction_ptr t;
		dst_transaction_set::iterator it;

		_tpool.find(out->destination(), out->tid(), t);

		if (t) {
			t->out = out;
			t->msg_out_avail = true;

			if (t->start_ack_requestor)
				t->ack_requestor();

			if (t->start_ack_responder)
				t->ack_responder();

			if(t->transaction_status == ONGOING)
				t->run();

			if (t->transaction_status != ONGOING && t->ack_requestor_status != ONGOING)
				_tpool.del(t);
		} else {
			new_src_transaction(out);
		}
	} else if ((out->opcode() == mih::operation::indication) || (out->opcode() == mih::operation::request)) {

		src_transaction_ptr t;
		_tpool.find(out->destination(), out->tid(), t);

		if (t) {
			t->out = out;
			t->msg_out_avail = true;

			if (t->start_ack_requestor)
				t->ack_requestor();

			if (t->start_ack_responder)
				t->ack_responder();

			if(t->transaction_status == ONGOING)
				t->run();

			if (t->transaction_status != ONGOING && t->ack_requestor_status != ONGOING)
				_tpool.del(t);
		} else {
			new_src_transaction(out);
		}
	}
}

// This message is handled by the Link SAP.
//
// If this MIHF is the destination of the message, forward it to the
// default Link SAP. If not then forward it to a peer MIHF.
bool command_service::link_get_parameters_request(meta_message_ptr &in,
						  meta_message_ptr &out)
{
	log(1, "(mics) received a Link_Get_Parameters.request from",
	    in->source().to_string());


	if(utils::this_mihf_is_destination(in)) {
		//
		// Kick this message to MIH_Link SAP.
		//
		// The solution found to handle this corner case in the
		// 802.21 standard was to send the message, as is, to the
		// link sap.
		//
		// local_transactions was made to handle request's
		// from users to peer mihf's but in this case we add an
		// entry to handle the MIH_Link_Get_Parameters and
		// Link_Get_Parameters.
		//
		in->destination(mih::id("link"));
		_lpool.add(in);
		in->source(mihfid);
		_transmit(in);

		return false;
	} else {
		utils::forward_request(in, _lpool, _transmit);
		return false;
	}

	return false;
}

//
// Currently Command_Service messages are handled by a default local
// user. If this MIHF is the destination of the message, check for a
// pending transaction and forward the message.
//
bool command_service::generic_command_response(const char *recv_msg,
					       const char *send_msg,
					       meta_message_ptr &in,
					       meta_message_ptr &out)
{
	log(1, recv_msg, in->source().to_string());

	if(utils::this_mihf_is_destination(in)) {
		//
		// Kick this message to default MIH User as an indication
		//
		log(1, send_msg);
		in->opcode(mih::operation::confirm);
		in->destination(mih::id("user"));
		//
		// source identifier is the remote MIHF
		//
		_transmit(in);

		return false;
	} else {
		utils::forward_request(in, _lpool, _transmit);
		return false;
	}

}

// This message is handled by the Link SAP.
//
// If this MIHF is the destination of the message, forward it to the
// default Link SAP. If not then forward it to a peer MIHF.
bool command_service::link_actions_request(meta_message_ptr &in,
					   meta_message_ptr &out)
{
	log(1, "(mics) received a Link_Actions.request from",
	    in->source().to_string());

	if(utils::this_mihf_is_destination(in)) {
		//
		// Kick this message to MIH_Link SAP.
		//
		// The solution found to handle this corner case in the
		// 802.21 standard was to send the message, as is, to the
		// link sap.
		//
		in->destination(mih::id("link"));
		_lpool.add(in);
		in->source(mihfid);
		_transmit(in);

		return false;
	} else {
		utils::forward_request(in, _lpool, _transmit);
		return false;
	}

	return false;
}

/**
 * Piggyback local MIHF Capabilities in request message.
 *
 * @param in input message.
 * @param out output message.
 */
void service_management::piggyback_capabilities(meta_message_ptr& in,
												meta_message_ptr& out)
{
	// Get local capabilities
	address_entry mihf_cap = _abook.get(mihfid_t::instance()->to_string());

	*out << mih::request(mih::request::capability_discover)
			& mih::tlv_net_type_addr_list(mihf_cap.capabilities_list_net_type_addr)
			& mih::tlv_event_list(mihf_cap.capabilities_event_list)
			& mih::tlv_command_list(mihf_cap.capabilities_cmd_list)
			& mih::tlv_query_type_list(mihf_cap.capabilities_query_type)
			& mih::tlv_transport_option_list(mihf_cap.capabilities_trans_list)
			& mih::tlv_mbb_ho_supp_list(mihf_cap.capabilities_mbb_ho_supp);

	out->tid(in->tid());
	out->source(in->source());
	out->destination(in->destination());
}

// A peer MIHF sent a Event_Unubscribe.response, check if we have a
// pending transaction with a local user. If so, then remove the
// subscription of the user to the link and events that came in the
// response.
bool event_service::event_unsubscribe_response(meta_message_ptr &in,
					       meta_message_ptr &)
{
	log(1, "(mies) received Event_Unsubscribe.response from ",
	    in->source().to_string());

	// do we have a request from a user?
	if (!_lpool.set_user_tid(in)) {
		log(1, "(mics) warning: no local transaction for this msg ",
		    "discarding it");

		return false;
	}

	mih::status		st;
	mih::link_tuple_id	link;
	mih::event_list		events;
	mih::message		pin;

	// parse incoming message to (event_registration_t) reg
	*in >>  mih::response()
		& mih::tlv_status(st)
		& mih::tlv_link_identifier(link)
		& mih::tlv_event_list(events);

	// remove subscription
	if (st == mih::status_success)
		st = unsubscribe(mih::id(in->destination().to_string()), link, events);

	log(1, "(mies) forwarding Event_Unsubscribe.response to ",
	    in->destination().to_string());

	// forward to user
	_transmit(in);

	return false;
}

// send message for all users subscribed to event from link identifier
void event_service::msg_forward(meta_message_ptr &msg,
				mih::link_tuple_id &li,
				mih::event_list_enum event)
{
	std::list<event_registration_t>::iterator it;
	int i = 0; // for logging purposes

	msg->source(mihfid);
	for(it = _event_subscriptions.begin();
	    it != _event_subscriptions.end();
	    it++, i++) {
		if ((it->event == event)  &&(it->link == li)) {
			log(3, i, " (mies) found registration of user: ",
			    it->user, " for event type ", event);
			msg->destination(mih::id(it->user));
			_transmit(msg);
		}
	}
}

/**
 * Link Get Parameters Response message handler.
 *
 * @param in The input message.
 * @param out The output message.
 * @return True if the response is sent immediately or false otherwise.
 */
bool command_service::link_get_parameters_response(meta_message_ptr &in,
						   meta_message_ptr &out)
{
	ODTONE_LOG(1, "(mics) received Link_Get_Parameters.response from ",
	    in->source().to_string());

	if(!_lpool.set_user_tid(in)) {
		ODTONE_LOG(1, "(mics) warning: no local transaction for this msg ",
			"discarding it");
		return false;
	}

	ODTONE_LOG(1, "(mics) forwarding Link_Get_Parameters.response to ",
	    in->destination().to_string());

	_transmit(in);

	return false;
}

// Check if there's a pending transaction and forward the message in
// case there is.
bool command_service::link_actions_response(meta_message_ptr &in,
					    meta_message_ptr &out)
{
	log(1, "(mics) received Link_Actions.response from ",
	    in->source().to_string());

	if(!_lpool.set_user_tid(in))
		{
			log(1, "(mics) no local pending transaction for this message, discarding");
			return false;
		}

	in->source(mihfid);

	log(1, "(mics) forwarding Link_Actions.response to ", in->destination().to_string());

	_transmit(in);

	return false;
}

// Check if there's a pending transaction and forward the message in
// case there is.
bool command_service::link_configure_thresholds_response(meta_message_ptr &in,
							 meta_message_ptr &out)
{
	log(1, "(mics) received Link_Configure_Thresholds.response from ",
	    in->source().to_string());

	if(!_lpool.set_user_tid(in)) {
		log(1, "(mics) warning: no local transaction for this msg ",
		    "discarding it");
		return false;
	}

	in->source(mihfid);

	log(1, "(mics) forwarding Link_Configure_Thresholds.response to ", in->destination().to_string());

	_transmit(in);

	return false;
}

/**
 * Create a new source transaction for the outgoing message.
 *
 * @param m The output message.
 */
void message_out::new_src_transaction(meta_message_ptr& m)
{
	src_transaction_ptr t(new src_transaction_t(process_message, _netsap));

	_tid++;
	if (_tid == 0)		// don't send a message with a
		_tid = 1;	// transaction id of 0

	_lpool.set_remote_tid(m->destination().to_string(), m->tid(), _tid);
	m->tid(_tid);

	t->out = m;
	t->mid = m->mid();
	t->msg_out_avail = true;

	t->run();

	if (t->transaction_status == ONGOING)
		_tpool.add(t);
}

// This MIHF is the destination of the Event_Unsubscribe.request.
// Deserialize message, unsubscribe user and send a response
bool event_service::local_event_unsubscribe_request(meta_message_ptr &in,
						    meta_message_ptr &out)
{
	mih::status st;
	mih::link_tuple_id link;
	mih::event_list events;

	*in >> mih::request(mih::request::event_unsubscribe)
		& mih::tlv_link_identifier(link)
		& mih::tlv_event_list(events);

	st = unsubscribe(in->source(), link, events);

	*out << mih::response(mih::response::event_unsubscribe)
		& mih::tlv_status(st)
		& mih::tlv_link_identifier(link)
		& mih::tlv_event_list(events);

	out->tid(in->tid());
	out->destination(in->source());

	return true;
}

	/**
	 * Run Acknowledge Responder State Machine transaction.
	 */
	void ack_responder()
		{
			switch(ack_rsp_state)
			{
			case ACK_RSP_INIT:
				goto _rsp_init_lbl_;
			case ACK_RSP_RETURN_ACK:
				goto _rsp_return_ack_lbl_;
			case ACK_RSP_PIGGYBACKING:
				goto _rsp_piggybacking_lbl_;
			case ACK_RSP_RETURN_DUPLICATE:
				goto _rsp_return_duplicate_lbl_;
			}

		  _rsp_init_lbl_:
			{
				ack->ackreq(false);
				ack->ackrsp(true);
				ack->opcode((mih::operation::type)opcode);
				ack->tid(tid);
				ack->mid(in->mid());
				ack->source(my_mihf_id);
				ack->destination(peer_mihf_id);
				ack->ip(in->ip());
				ack->port(in->port());

				if (msg_out_avail)
					goto _rsp_piggybacking_lbl_;
				else
				{			
					_netsap.send(ack);
					msg_in_avail = false;
					goto _rsp_return_ack_lbl_;
				}
					

				return;
			}

		  _rsp_return_ack_lbl_:
			{
				ack_rsp_state = ACK_RSP_RETURN_ACK;
				if(msg_in_avail)
				{					
					_netsap.send(ack);
					msg_in_avail = false;
				}
				else if (msg_out_avail)
					goto _rsp_piggybacking_lbl_;

				return;
			}

		  _rsp_piggybacking_lbl_:
			{
				ack_rsp_state = ACK_RSP_PIGGYBACKING;

				out->ackrsp(true);
				dup = out;

				if (msg_in_avail)
					goto _rsp_return_duplicate_lbl_;

				return;
			}

		  _rsp_return_duplicate_lbl_:
			{
				ack_rsp_state = ACK_RSP_RETURN_DUPLICATE;
				if (msg_in_avail) {
					_netsap.send(dup);
					msg_in_avail = false;
				}
			}
		}