From 4ed70a930202b103e7e80b8dc925e0aaa4622595 Mon Sep 17 00:00:00 2001
From: Martin Sustrik <sustrik@fastmq.commkdir>
Date: Wed, 29 Jul 2009 12:07:54 +0200
Subject: initial commit

---
 src/tcp_listener.cpp | 165 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 src/tcp_listener.cpp

(limited to 'src/tcp_listener.cpp')

diff --git a/src/tcp_listener.cpp b/src/tcp_listener.cpp
new file mode 100644
index 0000000..3703950
--- /dev/null
+++ b/src/tcp_listener.cpp
@@ -0,0 +1,165 @@
+/*
+    Copyright (c) 2007-2009 FastMQ Inc.
+
+    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/>.
+*/
+
+#include "tcp_listener.hpp"
+#include "platform.hpp"
+#include "ip.hpp"
+#include "config.hpp"
+#include "err.hpp"
+
+#ifdef ZS_HAVE_WINDOWS
+
+#include "windows.hpp"
+#error
+
+#else
+
+#include <unistd.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/tcp.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <fcntl.h>
+
+zs::tcp_listener_t::tcp_listener_t () :
+    s (retired_fd)
+{
+}
+
+zs::tcp_listener_t::~tcp_listener_t ()
+{
+    if (s != retired_fd)
+        close ();
+}
+
+int zs::tcp_listener_t::open (const char *addr_)
+{
+    //  Convert the interface into sockaddr_in structure.
+    sockaddr_in ip_address;
+    int rc = resolve_ip_interface (&ip_address, addr_);
+    if (rc != 0)
+        return -1;
+    
+    //  Create a listening socket.
+    s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
+    if (s == -1)
+        return -1;
+
+    //  Allow reusing of the address.
+    int flag = 1;
+    rc = setsockopt (s, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof (int));
+    errno_assert (rc == 0);
+
+    //  Set the non-blocking flag.
+    flag = fcntl (s, F_GETFL, 0);
+    if (flag == -1) 
+        flag = 0;
+    rc = fcntl (s, F_SETFL, flag | O_NONBLOCK);
+    errno_assert (rc != -1);
+
+    //  Bind the socket to the network interface and port.
+    rc = bind (s, (struct sockaddr*) &ip_address, sizeof (ip_address));
+    if (rc != 0) {
+        close ();
+        return -1;
+    }
+              
+    //  Listen for incomming connections.
+    rc = listen (s, tcp_connection_backlog);
+    if (rc != 0) {
+        close ();
+        return -1;
+    }
+
+    return 0;
+}
+
+int zs::tcp_listener_t::close ()
+{
+    zs_assert (s != retired_fd);
+    int rc = ::close (s);
+    if (rc != 0)
+        return -1;
+    s = retired_fd;
+    return 0;
+}
+
+zs::fd_t zs::tcp_listener_t::get_fd ()
+{
+    return s;
+}
+
+zs::fd_t zs::tcp_listener_t::accept ()
+{
+    zs_assert (s != retired_fd);
+
+    //  Accept one incoming connection.
+    fd_t sock = ::accept (s, NULL, NULL);
+
+#if (defined ZMQ_HAVE_LINUX || defined ZMQ_HAVE_FREEBSD || \
+     defined ZMQ_HAVE_OPENBSD || defined ZMQ_HAVE_OSX || \
+     defined ZMQ_HAVE_OPENVMS)
+    if (sock == -1 && 
+        (errno == EAGAIN || errno == EWOULDBLOCK || 
+         errno == EINTR || errno == ECONNABORTED))
+        return retired_fd;
+#elif (defined ZMQ_HAVE_SOLARIS || defined ZMQ_HAVE_AIX)
+    if (sock == -1 && 
+        (errno == EWOULDBLOCK || errno == EINTR || 
+         errno == ECONNABORTED || errno == EPROTO))
+        return retired_fd;
+#elif defined ZMQ_HAVE_HPUX
+    if (sock == -1 && 
+        (errno == EAGAIN || errno == EWOULDBLOCK || 
+         errno == EINTR || errno == ECONNABORTED || errno == ENOBUFS))
+        return retired_fd;
+#elif defined ZMQ_HAVE_QNXNTO 
+    if (sock == -1 && 
+        (errno == EWOULDBLOCK || errno == EINTR || errno == ECONNABORTED))
+        return retired_fd;
+#endif
+
+    errno_assert (sock != -1); 
+
+    // Set to non-blocking mode.
+    int flags = fcntl (s, F_GETFL, 0);
+    if (flags == -1) 
+        flags = 0;
+    int rc = fcntl (sock, F_SETFL, flags | O_NONBLOCK);
+    errno_assert (rc != -1);
+
+    //  Disable Nagle's algorithm.
+    int flag = 1;
+    rc = setsockopt (sock, IPPROTO_TCP, TCP_NODELAY, (char*) &flag,
+        sizeof (int));
+    errno_assert (rc == 0);
+
+#ifdef ZS_HAVE_OPENVMS
+    //  Disable delayed acknowledgements.
+    flag = 1;
+    rc = setsockopt (sock, IPPROTO_TCP, TCP_NODELACK, (char*) &flag,
+        sizeof (int));
+    errno_assert (rc != SOCKET_ERROR);
+#endif
+
+    return sock;
+}
+
+#endif
-- 
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