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_socket.cpp | 116 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 src/tcp_socket.cpp

(limited to 'src/tcp_socket.cpp')

diff --git a/src/tcp_socket.cpp b/src/tcp_socket.cpp
new file mode 100644
index 0000000..70fde96
--- /dev/null
+++ b/src/tcp_socket.cpp
@@ -0,0 +1,116 @@
+/*
+    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_socket.hpp"
+#include "platform.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_socket_t::tcp_socket_t () :
+    s (retired_fd)
+{
+}
+
+zs::tcp_socket_t::~tcp_socket_t ()
+{
+    if (s != retired_fd)
+        close ();
+}
+
+int zs::tcp_socket_t::open (fd_t fd_)
+{
+    assert (s == retired_fd);
+    s = fd_;
+    return 0;
+}
+
+int zs::tcp_socket_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_socket_t::get_fd ()
+{
+    return s;
+}
+
+int zs::tcp_socket_t::write (const void *data, int size)
+{
+    ssize_t nbytes = send (s, data, size, 0);
+
+    //  Several errors are OK. When speculative write is being done we may not
+    //  be able to write a single byte to the socket. Also, SIGSTOP issued
+    //  by a debugging tool can result in EINTR error.
+    if (nbytes == -1 && (errno == EAGAIN || errno == EWOULDBLOCK ||
+          errno == EINTR))
+        return 0;
+
+    //  Signalise peer failure.
+    if (nbytes == -1 && errno == ECONNRESET)
+        return -1;
+
+    errno_assert (nbytes != -1);
+    return (size_t) nbytes;
+}
+
+int zs::tcp_socket_t::read (void *data, int size)
+{
+    ssize_t nbytes = recv (s, data, size, 0);
+
+    //  Several errors are OK. When speculative read is being done we may not
+    //  be able to read a single byte to the socket. Also, SIGSTOP issued
+    //  by a debugging tool can result in EINTR error.
+    if (nbytes == -1 && (errno == EAGAIN || errno == EWOULDBLOCK ||
+          errno == EINTR))
+        return 0;
+
+    //  Signalise peer failure.
+    if (nbytes == -1 && (errno == ECONNRESET || errno == ECONNREFUSED))
+        return -1;
+
+    errno_assert (nbytes != -1);
+
+    //  Orderly shutdown by the other peer.
+    if (nbytes == 0)
+        return -1;
+
+    return (size_t) nbytes;
+}
+
+#endif
+
-- 
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