1 files changed, 134 insertions, 0 deletions
diff --git a/nuttx/net/tcp/tcp_devpoll.c b/nuttx/net/tcp/tcp_devpoll.c
new file mode 100644
index 000000000..32bf535ee
--- /dev/null
+++ b/nuttx/net/tcp/tcp_devpoll.c
@@ -0,0 +1,134 @@
+/****************************************************************************
+ * net/tcp/tcp_devpoll.c
+ * Driver poll for the availability of TCP TX data
+ *
+ *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Adapted for NuttX from logic in uIP which also has a BSD-like license:
+ *
+ *   Original author Adam Dunkels <adam@dunkels.com>
+ *   Copyright () 2001-2003, Adam Dunkels.
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#if defined(CONFIG_NET) && defined(CONFIG_NET_TCP)
+
+#include <stdint.h>
+#include <debug.h>
+
+#include <nuttx/net/netconfig.h>
+#include <nuttx/net/netdev.h>
+#include <nuttx/net/tcp.h>
+
+#include "devif/devif.h"
+#include "tcp/tcp.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: tcp_poll
+ *
+ * Description:
+ *   Poll a TCP connection structure for availability of TX data
+ *
+ * Parameters:
+ *   dev - The device driver structure to use in the send operation
+ *   conn - The TCP "connection" to poll for TX data
+ *
+ * Return:
+ *   None
+ *
+ * Assumptions:
+ *   Called from the interrupt level or with interrupts disabled.
+ *
+ ****************************************************************************/
+
+void tcp_poll(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn)
+{
+  uint8_t result;
+
+  /* Verify that the connection is established */
+
+  if ((conn->tcpstateflags & TCP_STATE_MASK) == TCP_ESTABLISHED)
+    {
+      /* Set up for the callback.  We can't know in advance if the application
+       * is going to send a IPv4 or an IPv6 packet, so this setup may not
+       * actually be used.
+       */
+
+#if defined(CONFIG_NET_IPv4)
+      tcp_ipv4_select(dev);
+#else /* if defined(CONFIG_NET_IPv6) */
+      tcp_ipv6_select(dev);
+#endif
+
+      dev->d_len     = 0;
+      dev->d_sndlen  = 0;
+
+      /* Perform the callback */
+
+      result = tcp_callback(dev, conn, TCP_POLL);
+
+      /* Handle the callback response */
+
+      tcp_appsend(dev, conn, result);
+    }
+  else
+    {
+      /* Nothing to do for this connection */
+
+      dev->d_len = 0;
+    }
+}
+
+#endif /* CONFIG_NET && CONFIG_NET_TCP */