Move TCP files from net/uip to net/tcp

1 files changed, 166 insertions, 0 deletions

diff --git a/nuttx/net/tcp/tcp_wrbuffer.c b/nuttx/net/tcp/tcp_wrbuffer.c
new file mode 100644
index 000000000..7211655a5
--- /dev/null
+++ b/nuttx/net/tcp/tcp_wrbuffer.c
@@ -0,0 +1,166 @@
+/****************************************************************************
+ * net/tcp/tcp_wrbuffer.c
+ *
+ *   Copyright (C) 2007-2009, 2013-2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *           Jason Jiang  <jasonj@live.cn>
+ *
+ * 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. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "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
+ * COPYRIGHT OWNER OR CONTRIBUTORS 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/net/uip/uipopt.h>
+#if defined(CONFIG_NET) && defined(CONFIG_NET_TCP) && defined(CONFIG_NET_TCP_WRITE_BUFFERS)
+
+#include <queue.h>
+#include <semaphore.h>
+#include <debug.h>
+
+#include "uip/uip_internal.h"
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/* Package all globals used by this logic into a structure */
+
+struct wrbuffer_s
+{
+  /* The semaphore to protect the buffers */
+
+  sem_t sem;
+
+  /* This is the list of available write buffers */
+
+  sq_queue_t freebuffers;
+
+  /* These are the pre-allocated write buffers */
+
+  struct uip_wrbuffer_s buffers[CONFIG_NET_NTCP_WRITE_BUFFERS];
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/* This is the state of the global write buffer resource */
+
+static struct wrbuffer_s g_wrbuffer;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: uip_tcpwrbuffer_init
+ *
+ * Description:
+ *   Initialize the list of free write buffers
+ *
+ * Assumptions:
+ *   Called once early initialization.
+ *
+ ****************************************************************************/
+
+void uip_tcpwrbuffer_init(void)
+{
+  int i;
+
+  sq_init(&g_wrbuffer.freebuffers);
+
+  for (i = 0; i < CONFIG_NET_NTCP_WRITE_BUFFERS; i++)
+    {
+      sq_addfirst(&g_wrbuffer.buffers[i].wb_node, &g_wrbuffer.freebuffers);
+    }
+
+  sem_init(&g_wrbuffer.sem, 0, CONFIG_NET_NTCP_WRITE_BUFFERS);
+}
+
+/****************************************************************************
+ * Function: uip_tcpwrbuffer_alloc
+ *
+ * Description:
+ *   Allocate a TCP write buffer by taking a pre-allocated buffer from
+ *   the free list.  This function is called from TCP logic when a buffer
+ *   of TCP data is about to sent
+ *
+ * Assumptions:
+ *   Called from user logic with interrupts enabled.
+ *
+ ****************************************************************************/
+
+FAR struct uip_wrbuffer_s *
+uip_tcpwrbuffer_alloc(FAR const struct timespec *abstime)
+{
+  int ret;
+
+  if (abstime)
+    {
+      ret = sem_timedwait(&g_wrbuffer.sem, abstime);
+    }
+  else
+    {
+      ret = sem_wait(&g_wrbuffer.sem);
+    }
+
+  if (ret != 0)
+    {
+      return NULL;
+    }
+
+  return (FAR struct uip_wrbuffer_s*)sq_remfirst(&g_wrbuffer.freebuffers);
+}
+
+/****************************************************************************
+ * Function: uip_tcpwrbuffer_release
+ *
+ * Description:
+ *   Release a TCP write buffer by returning the buffer to the free list.
+ *   This function is called from user logic after it is consumed the
+ *   buffered data.
+ *
+ * Assumptions:
+ *   Called from interrupt level with interrupts disabled.
+ *
+ ****************************************************************************/
+
+void uip_tcpwrbuffer_release(FAR struct uip_wrbuffer_s *wrbuffer)
+{
+  sq_addlast(&wrbuffer->wb_node, &g_wrbuffer.freebuffers);
+  sem_post(&g_wrbuffer.sem);
+}
+
+#endif /* CONFIG_NET && CONFIG_NET_TCP && CONFIG_NET_TCP_WRITE_BUFFERS */