Experimental VTCP listener added

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

configure.in

@@ -341,6 +341,19 @@ fi
 
 AC_SUBST(pgm_basename)
 
+#  VTCP extension
+libzmq_vtcp="no"
+
+AC_ARG_WITH([vtcp], [AS_HELP_STRING([--with-vtcp], 
+    [build libzmq with VTCP extension [default=no]])], 
+    [with_vtcp=$withval], [with_vtcp=no])
+
+if test "x$with_vtcp" != "xno"; then
+    AC_DEFINE(ZMQ_HAVE_VTCP, 1, [Have VTCP extension])
+    AC_CHECK_LIB(vtcp, vtcp_bind, ,
+        [AC_MSG_ERROR([cannot link with -lvtcp, install libvtcp.])])
+fi
+
 # Set -Wall, -Werror and -pedantic
 AC_LANG_PUSH([C++])
 

src/Makefile.am

@@ -64,6 +64,8 @@ libzmq_la_SOURCES = \
     tcp_listener.hpp \
     thread.hpp \
     trie.hpp \
+    vtcp_connecter.hpp \
+    vtcp_listener.hpp \
     windows.hpp \
     wire.hpp \
     xpub.hpp \
@@ -117,6 +119,8 @@ libzmq_la_SOURCES = \
     tcp_listener.cpp \
     thread.cpp \
     trie.cpp \
+    vtcp_connecter.cpp \
+    vtcp_listener.cpp \
     xpub.cpp \
     xrep.cpp \
     xreq.cpp \

src/socket_base.cpp

@@ -35,6 +35,7 @@
 
 #include "socket_base.hpp"
 #include "tcp_listener.hpp"
+#include "vtcp_listener.hpp"
 #include "tcp_connecter.hpp"
 #include "io_thread.hpp"
 #include "session.hpp"
@@ -174,7 +175,8 @@ int zmq::socket_base_t::check_protocol (const std::string &protocol_)
 {
     //  First check out whether the protcol is something we are aware of.
     if (protocol_ != "inproc" && protocol_ != "ipc" && protocol_ != "tcp" &&
-          protocol_ != "pgm" && protocol_ != "epgm" && protocol_ != "sys") {
+          protocol_ != "pgm" && protocol_ != "epgm" && protocol_ != "sys" &&
+          protocol_ != "vtcp") {
         errno = EPROTONOSUPPORT;
         return -1;
     }
@@ -188,6 +190,14 @@ int zmq::socket_base_t::check_protocol (const std::string &protocol_)
     }
 #endif
 
+    //  If 0MQ is not compiled with VTCP, vtcp transport is not avaialble.
+#if !defined ZMQ_HAVE_VTCP
+    if (protocol_ == "vtcp") {
+        errno = EPROTONOSUPPORT;
+        return -1;
+    }
+#endif
+
     //  IPC transport is not available on Windows and OpenVMS.
 #if defined ZMQ_HAVE_WINDOWS || defined ZMQ_HAVE_OPENVMS
     if (protocol_ == "ipc") {
@@ -338,16 +348,22 @@ int zmq::socket_base_t::bind (const char *addr_)
         return register_endpoint (addr_, endpoint);
     }
 
-    if (protocol == "tcp" || protocol == "ipc") {
+    if (protocol == "pgm" || protocol == "epgm") {
 
-        //  Choose I/O thread to run the listerner in.
-        io_thread_t *io_thread = choose_io_thread (options.affinity);
-        if (!io_thread) {
-            errno = EMTHREAD;
-            return -1;
-        }
+        //  For convenience's sake, bind can be used interchageable with
+        //  connect for PGM and EPGM transports.
+        return connect (addr_); 
+    }
 
-        //  Create and run the listener.
+    //  Remaining trasnports require to be run in an I/O thread, so at this
+    //  point we'll choose one.
+    io_thread_t *io_thread = choose_io_thread (options.affinity);
+    if (!io_thread) {
+        errno = EMTHREAD;
+        return -1;
+    }
+
+    if (protocol == "tcp" || protocol == "ipc") {
         tcp_listener_t *listener = new (std::nothrow) tcp_listener_t (
             io_thread, this, options);
         alloc_assert (listener);
@@ -357,16 +373,23 @@ int zmq::socket_base_t::bind (const char *addr_)
             return -1;
         }
         launch_child (listener);
-
         return 0;
     }
 
-    if (protocol == "pgm" || protocol == "epgm") {
-
-        //  For convenience's sake, bind can be used interchageable with
-        //  connect for PGM and EPGM transports.
-        return connect (addr_); 
+#if defined ZMQ_HAVE_VTCP
+    if (protocol == "vtcp") {
+        vtcp_listener_t *listener = new (std::nothrow) vtcp_listener_t (
+            io_thread, this, options);
+        alloc_assert (listener);
+        int rc = listener->set_address (address.c_str ());
+        if (rc != 0) {
+            delete listener;
+            return -1;
+        }
+        launch_child (listener);
+        return 0;
     }
+#endif
 
     zmq_assert (false);
     return -1;

src/tcp_connecter.cpp

@@ -21,6 +21,52 @@
 #include <new>
 #include <string>
 
+#include "tcp_connecter.hpp"
+#include "tcp_engine.hpp"
+#include "platform.hpp"
+#include "ip.hpp"
+#include "err.hpp"
+
+#if defined ZMQ_HAVE_WINDOWS
+#include "windows.hpp"
+#else
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/tcp.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <fcntl.h>
+#ifdef ZMQ_HAVE_OPENVMS
+#include <ioctl.h>
+#endif
+#endif
+
+
+/*
+    Copyright (c) 2007-2011 iMatix Corporation
+    Copyright (c) 2007-2011 Other 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/>.
+*/
+
+#include <new>
+#include <string>
+
 #include "tcp_connecter.hpp"
 #include "tcp_engine.hpp"
 #include "io_thread.hpp"

src/tcp_connecter.hpp

@@ -18,8 +18,8 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef __ZMQ_TCP_CONNECTER_HPP_INCLUDED__
-#define __ZMQ_TCP_CONNECTER_HPP_INCLUDED__
+#ifndef __TCP_CONNECTER_HPP_INCLUDED__
+#define __TCP_CONNECTER_HPP_INCLUDED__
 
 #include "fd.hpp"
 #include "ip.hpp"
@@ -30,11 +30,14 @@
 namespace zmq
 {
 
+    //  A base class for different connecters. It handles auto-reconnection
+    //  on behalf of the derived class.
+
     class tcp_connecter_t : public own_t, public io_object_t
     {
     public:
 
-        //  If 'wait' is true connecter first waits for a while, then starts
+        //  If 'delay' is true connecter first waits for a while, then starts
         //  connection process.
         tcp_connecter_t (class io_thread_t *io_thread_,
             class session_t *session_, const options_t &options_,
@@ -68,8 +71,7 @@ namespace zmq
         //  Set address to connect to.
         int set_address (const char *protocol, const char *addr_);
 
-        //  Open TCP connecting socket. Address is in
-        //  <hostname>:<port-number> format. Returns -1 in case of error,
+        //  Open TCP connecting socket. Returns -1 in case of error,
         //  0 if connect was successfull immediately and 1 if async connect
         //  was launched.
         int open ();

src/tcp_listener.cpp

@@ -86,6 +86,7 @@ void zmq::tcp_listener_t::in_event ()
     //  TODO: Handle specific errors like ENFILE/EMFILE etc.
     if (fd == retired_fd)
         return;
+
     //  Create the engine object for this connection.
     tcp_engine_t *engine = new (std::nothrow) tcp_engine_t (fd, options);
     alloc_assert (engine);

src/vtcp_listener.cpp

+/*
+    Copyright (c) 2007-2011 iMatix Corporation
+    Copyright (c) 2007-2011 Other 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/>.
+*/
+
+#include "vtcp_listener.hpp"
+
+#if defined ZMQ_HAVE_VTCP
+
+#include <string>
+#include <string.h>
+#include <vtcp.h>
+
+#include "tcp_engine.hpp"
+#include "session.hpp"
+#include "stdint.hpp"
+#include "err.hpp"
+
+zmq::vtcp_listener_t::vtcp_listener_t (io_thread_t *io_thread_,
+        socket_base_t *socket_, options_t &options_) :
+    own_t (io_thread_, options_),
+    io_object_t (io_thread_),
+    s (retired_fd),
+    socket (socket_)
+{
+}
+
+zmq::vtcp_listener_t::~vtcp_listener_t ()
+{
+    zmq_assert (s != retired_fd);
+    int rc = ::close (s);
+    errno_assert (rc == 0);
+    s = retired_fd;
+}
+
+int zmq::vtcp_listener_t::set_address (const char *addr_)
+{
+    //  Find the '.' at end that separates NIC name from service.
+    const char *delimiter = strrchr (addr_, '.');
+    if (!delimiter) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    //  Parse port and subport.
+    std::string port_str (addr_, delimiter - addr_);
+    std::string subport_str (delimiter + 1);
+    uint16_t port = (uint16_t) atoi (port_str.c_str ());
+    uint32_t subport = (uint32_t) atoi (subport_str.c_str ());
+
+    //  Srart listening.
+    s = vtcp_bind (port, subport);
+    if (s == retired_fd)
+        return -1;
+
+    return 0;
+}
+
+void zmq::vtcp_listener_t::process_plug ()
+{
+    //  Start polling for incoming connections.
+    handle = add_fd (s);
+    set_pollin (handle);
+}
+
+void zmq::vtcp_listener_t::process_term (int linger_)
+{
+    rm_fd (handle);
+    own_t::process_term (linger_);
+}
+
+void zmq::vtcp_listener_t::in_event ()
+{
+    fd_t fd = vtcp_acceptb (s);
+    if (fd == retired_fd)
+        return;
+
+    //  Create the engine object for this connection.
+    tcp_engine_t *engine = new (std::nothrow) tcp_engine_t (fd, options);
+    alloc_assert (engine);
+
+    //  Choose I/O thread to run connecter in. Given that we are already
+    //  running in an I/O thread, there must be at least one available.
+    io_thread_t *io_thread = choose_io_thread (options.affinity);
+    zmq_assert (io_thread);
+
+    //  Create and launch a session object. 
+    session_t *session = new (std::nothrow)
+        session_t (io_thread, false, socket, options, NULL, NULL);
+    alloc_assert (session);
+    session->inc_seqnum ();
+    launch_child (session);
+    send_attach (session, engine, false);
+}
+
+#endif

src/vtcp_listener.hpp

+/*
+    Copyright (c) 2007-2011 iMatix Corporation
+    Copyright (c) 2007-2011 Other 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_VTCP_LISTENER_HPP_INCLUDED__
+#define __ZMQ_VTCP_LISTENER_HPP_INCLUDED__
+
+#include "platform.hpp"
+
+#if defined ZMQ_HAVE_VTCP
+
+#include "own.hpp"
+#include "io_object.hpp"
+#include "fd.hpp"
+
+namespace zmq
+{
+
+    class vtcp_listener_t : public own_t, public io_object_t
+    {
+    public:
+
+        vtcp_listener_t (class io_thread_t *io_thread_,
+            class socket_base_t *socket_, class options_t &options_);
+        ~vtcp_listener_t ();
+
+        int set_address (const char *addr_);
+
+    private:
+
+        //  Handlers for incoming commands.
+        void process_plug ();
+        void process_term (int linger_);
+
+        //  Handlers for I/O events.
+        void in_event ();
+
+        //  VTCP listener socket.
+        fd_t s;
+
+        //  Handle corresponding to the listening socket.
+        handle_t handle;
+
+        //  Socket the listerner belongs to.
+        class socket_base_t *socket;
+
+        vtcp_listener_t (const vtcp_listener_t&);
+        const vtcp_listener_t &operator = (const vtcp_listener_t&);
+    };
+
+}
+
+#endif
+
+#endif