1 files changed, 211 insertions, 0 deletions
diff --git a/src/ipc_listener.cpp b/src/ipc_listener.cpp
new file mode 100644
index 0000000..b102da6
--- /dev/null
+++ b/src/ipc_listener.cpp
@@ -0,0 +1,211 @@
+/*
+    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/>.
+*/
+
+#include "ipc_listener.hpp"
+
+#if !defined ZMQ_HAVE_WINDOWS && !defined ZMQ_HAVE_OPENVMS
+
+#include <new>
+
+#include <string.h>
+
+#include "stream_engine.hpp"
+#include "ipc_address.hpp"
+#include "io_thread.hpp"
+#include "session_base.hpp"
+#include "config.hpp"
+#include "err.hpp"
+#include "ip.hpp"
+#include "socket_base.hpp"
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+#include <sys/un.h>
+
+zmq::ipc_listener_t::ipc_listener_t (io_thread_t *io_thread_,
+      socket_base_t *socket_, const options_t &options_) :
+    own_t (io_thread_, options_),
+    io_object_t (io_thread_),
+    has_file (false),
+    s (retired_fd),
+    socket (socket_)
+{
+}
+
+zmq::ipc_listener_t::~ipc_listener_t ()
+{
+    zmq_assert (s == retired_fd);
+}
+
+void zmq::ipc_listener_t::process_plug ()
+{
+    //  Start polling for incoming connections.
+    handle = add_fd (s);
+    set_pollin (handle);
+}
+
+void zmq::ipc_listener_t::process_term (int linger_)
+{
+    rm_fd (handle);
+    close ();
+    own_t::process_term (linger_);
+}
+
+void zmq::ipc_listener_t::in_event ()
+{
+    fd_t fd = accept ();
+
+    //  If connection was reset by the peer in the meantime, just ignore it.
+    //  TODO: Handle specific errors like ENFILE/EMFILE etc.
+    if (fd == retired_fd) {
+        socket->event_accept_failed (endpoint, zmq_errno());
+        return;
+    }
+
+    //  Create the engine object for this connection.
+    stream_engine_t *engine = new (std::nothrow)
+        stream_engine_t (fd, options, endpoint);
+    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_base_t *session = session_base_t::create (io_thread, false, socket,
+        options, NULL);
+    errno_assert (session);
+    session->inc_seqnum ();
+    launch_child (session);
+    send_attach (session, engine, false);
+    socket->event_accepted (endpoint, fd);
+}
+
+int zmq::ipc_listener_t::get_address (std::string &addr_)
+{
+    struct sockaddr_storage ss;
+#ifdef ZMQ_HAVE_HPUX
+    int sl = sizeof (ss);
+#else
+    socklen_t sl = sizeof (ss);
+#endif
+    int rc = getsockname (s, (sockaddr *) &ss, &sl);
+    if (rc != 0) {
+        addr_.clear ();
+        return rc;
+    }
+
+    ipc_address_t addr ((struct sockaddr *) &ss, sl);
+    return addr.to_string (addr_);
+}
+
+int zmq::ipc_listener_t::set_address (const char *addr_)
+{
+    //  Create addr on stack for auto-cleanup
+    std::string addr (addr_);
+
+    //  Allow wildcard file
+    if (addr[0] == '*') {
+        char *tmpstr = tempnam (NULL, NULL);
+        addr.assign (tmpstr);
+        free (tmpstr);
+    }
+
+    //  Get rid of the file associated with the UNIX domain socket that
+    //  may have been left behind by the previous run of the application.
+    ::unlink (addr.c_str());
+    filename.clear ();
+
+    //  Initialise the address structure.
+    ipc_address_t address;
+    int rc = address.resolve (addr.c_str());
+    if (rc != 0)
+        return -1;
+
+    //  Create a listening socket.
+    s = open_socket (AF_UNIX, SOCK_STREAM, 0);
+    if (s == -1)
+        return -1;
+
+    address.to_string (endpoint);
+
+    //  Bind the socket to the file path.
+    rc = bind (s, address.addr (), address.addrlen ());
+    if (rc != 0)
+        goto error;
+
+    filename.assign (addr.c_str());
+    has_file = true;
+
+    //  Listen for incoming connections.
+    rc = listen (s, options.backlog);
+    if (rc != 0)
+        goto error;
+
+    socket->event_listening (endpoint, s);
+    return 0;
+
+error:
+    int err = errno;
+    close ();
+    errno = err;
+    return -1;
+}
+
+int zmq::ipc_listener_t::close ()
+{
+    zmq_assert (s != retired_fd);
+    int rc = ::close (s);
+    errno_assert (rc == 0);
+
+    s = retired_fd;
+
+    //  If there's an underlying UNIX domain socket, get rid of the file it
+    //  is associated with.
+    if (has_file && !filename.empty ()) {
+        rc = ::unlink(filename.c_str ());
+        if (rc != 0) {
+            socket->event_close_failed (endpoint, zmq_errno());
+            return -1;
+        }
+    }
+
+    socket->event_closed (endpoint, s);
+    return 0;
+}
+
+zmq::fd_t zmq::ipc_listener_t::accept ()
+{
+    //  Accept one connection and deal with different failure modes.
+    //  The situation where connection cannot be accepted due to insufficient
+    //  resources is considered valid and treated by ignoring the connection.
+    zmq_assert (s != retired_fd);
+    fd_t sock = ::accept (s, NULL, NULL);
+    if (sock == -1) {
+        errno_assert (errno == EAGAIN || errno == EWOULDBLOCK ||
+            errno == EINTR || errno == ECONNABORTED || errno == EPROTO ||
+            errno == ENFILE);
+        return retired_fd;
+    }
+    return sock;
+}
+
+#endif