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diff --git a/src/options.hpp b/src/options.hpp
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+/*
+    Copyright (c) 2007-2010 iMatix Corporation
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the Lesser GNU 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
+    Lesser GNU General Public License for more details.
+
+    You should have received a copy of the Lesser GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_OPTIONS_HPP_INCLUDED__
+#define __ZMQ_OPTIONS_HPP_INCLUDED__
+
+#include "stddef.h"
+#include "stdint.hpp"
+#include "blob.hpp"
+
+namespace zmq
+{
+
+    struct options_t
+    {
+        options_t ();
+
+        int setsockopt (int option_, const void *optval_, size_t optvallen_);
+        int getsockopt (int option_, void *optval_, size_t *optvallen_);
+
+        uint64_t hwm;
+        int64_t swap;
+        uint64_t affinity;
+        blob_t identity;
+
+        //  Maximum tranfer rate [kb/s]. Default 100kb/s.
+        uint32_t rate;
+
+        //  Reliability time interval [s]. Default 10s.
+        uint32_t recovery_ivl;
+
+        //  Enable multicast loopback. Default disabled (false).
+        bool use_multicast_loop;
+
+        uint64_t sndbuf;
+        uint64_t rcvbuf;
+
+        //  These options are never set by the user directly. Instead they are
+        //  provided by the specific socket type.
+        bool requires_in;
+        bool requires_out;
+
+        //  If true, when connecting, pipes are created immediately without
+        //  waiting for the connection to be established. That way the socket
+        //  is not aware of the peer's identity, however, it is able to send
+        //  messages straight away.
+        bool immediate_connect;
+    };
+
+}
+
+#endif