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diff --git a/src/tcp_address.hpp b/src/tcp_address.hpp
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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_TCP_ADDRESS_HPP_INCLUDED__
+#define __ZMQ_TCP_ADDRESS_HPP_INCLUDED__
+
+#include "platform.hpp"
+
+#if defined ZMQ_HAVE_WINDOWS
+#include "windows.hpp"
+#else
+#include <sys/socket.h>
+#include <netinet/in.h>
+#endif
+
+namespace zmq
+{
+
+    class tcp_address_t
+    {
+    public:
+
+        tcp_address_t ();
+        tcp_address_t (const sockaddr *sa, socklen_t sa_len);
+        virtual ~tcp_address_t ();
+
+        //  This function translates textual TCP address into an address
+        //  strcuture. If 'local' is true, names are resolved as local interface
+        //  names. If it is false, names are resolved as remote hostnames.
+        //  If 'ipv6' is true, the name may resolve to IPv6 address.
+        int resolve (const char *name_, bool local_, bool ipv6_);
+
+        //  The opposite to resolve()
+        virtual int to_string (std::string &addr_);
+
+#if defined ZMQ_HAVE_WINDOWS
+        unsigned short family () const;
+#else
+        sa_family_t family () const;
+#endif
+        const sockaddr *addr () const;
+        socklen_t addrlen () const;
+
+    protected:
+        int resolve_nic_name (const char *nic_, bool ipv6_);
+        int resolve_interface (const char *interface_, bool ipv6_);
+        int resolve_hostname (const char *hostname_, bool ipv6_);
+
+        union {
+            sockaddr generic;
+            sockaddr_in ipv4;
+            sockaddr_in6 ipv6;
+        } address;
+    };
+
+    class tcp_address_mask_t : public tcp_address_t
+    {
+    public:
+        tcp_address_mask_t ();
+
+        // This function enhances tcp_address_t::resolve() with ability to parse
+        // additional cidr-like(/xx) mask value at the end of the name string.
+        // Works only with remote hostnames.
+        int resolve (const char *name_, bool ipv6_);
+
+        // The opposite to resolve()
+        int to_string (std::string &addr_);
+
+        int mask () const;
+
+        bool match_address (const struct sockaddr *ss, const socklen_t ss_len) const;
+
+    private:
+        int address_mask;
+    };
+
+}
+
+#endif