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-/*
- Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
-
- This file is part of 0MQ.
-
- 0MQ is free software; you can redistribute it and/or modify it under
- the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- 0MQ is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef __ZMQ_ROUTER_HPP_INCLUDED__
-#define __ZMQ_ROUTER_HPP_INCLUDED__
-
-#include <map>
-
-#include "socket_base.hpp"
-#include "session_base.hpp"
-#include "stdint.hpp"
-#include "blob.hpp"
-#include "msg.hpp"
-#include "fq.hpp"
-
-namespace zmq
-{
-
- class ctx_t;
- class pipe_t;
-
- // TODO: This class uses O(n) scheduling. Rewrite it to use O(1) algorithm.
- class router_t :
- public socket_base_t
- {
- public:
-
- router_t (zmq::ctx_t *parent_, uint32_t tid_, int sid);
- ~router_t ();
-
- // Overloads of functions from socket_base_t.
- void xattach_pipe (zmq::pipe_t *pipe_, bool subscribe_to_all_);
- int xsetsockopt (int option_, const void *optval_, size_t optvallen_);
- int xsend (zmq::msg_t *msg_);
- int xrecv (zmq::msg_t *msg_);
- bool xhas_in ();
- bool xhas_out ();
- void xread_activated (zmq::pipe_t *pipe_);
- void xwrite_activated (zmq::pipe_t *pipe_);
- void xpipe_terminated (zmq::pipe_t *pipe_);
-
- protected:
-
- // Rollback any message parts that were sent but not yet flushed.
- int rollback ();
-
- private:
-
- // Receive peer id and update lookup map
- bool identify_peer (pipe_t *pipe_);
-
- // Fair queueing object for inbound pipes.
- fq_t fq;
-
- // True iff there is a message held in the pre-fetch buffer.
- bool prefetched;
-
- // If true, the receiver got the message part with
- // the peer's identity.
- bool identity_sent;
-
- // Holds the prefetched identity.
- msg_t prefetched_id;
-
- // Holds the prefetched message.
- msg_t prefetched_msg;
-
- // If true, more incoming message parts are expected.
- bool more_in;
-
- struct outpipe_t
- {
- zmq::pipe_t *pipe;
- bool active;
- };
-
- // We keep a set of pipes that have not been identified yet.
- std::set <pipe_t*> anonymous_pipes;
-
- // Outbound pipes indexed by the peer IDs.
- typedef std::map <blob_t, outpipe_t> outpipes_t;
- outpipes_t outpipes;
-
- // The pipe we are currently writing to.
- zmq::pipe_t *current_out;
-
- // If true, more outgoing message parts are expected.
- bool more_out;
-
- // Peer ID are generated. It's a simple increment and wrap-over
- // algorithm. This value is the next ID to use (if not used already).
- uint32_t next_peer_id;
-
- // If true, report EAGAIN to the caller instead of silently dropping
- // the message targeting an unknown peer.
- bool mandatory;
- bool raw_sock;
-
- // if true, send an empty message to every connected router peer
- bool probe_router;
-
- router_t (const router_t&);
- const router_t &operator = (const router_t&);
- };
-
-}
-
-#endif