Add nuttx to the system framework, which is 10.1.0

Ubiquitous/Nuttx/apps/netutils/ftpc/ftpc_cmd.c

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+/****************************************************************************
+ * apps/netutils/ftpc/ftpc_cmd.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 "ftpc_config.h"
+
+#include <stdlib.h>
+#include <strings.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <debug.h>
+
+#include "ftpc_internal.h"
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: ftpc_restore
+ *
+ * Description:
+ *   Restore the connection to the server and log in again.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_FTP_AUTORECONNECT
+static int ftpc_restore(struct ftpc_session_s *session)
+{
+  int ret;
+
+  if (session)
+    {
+      /* Set the initial directory to the last valid current directory */
+
+      free(session->initrdir);
+      session->initrdir = ftpc_dequote(session->currdir);
+
+      /* Reconnect to the server */
+
+      ret = ftpc_reconnect(session);
+      if (ret == 0)
+        {
+          /* Log into the server */
+
+          ret = ftpc_relogin(session);
+        }
+      else
+        {
+          /* Failed to reconnect to the server */
+
+          ftpc_reset(session);
+        }
+
+      return ret;
+    }
+
+  return ERROR;
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: ftpc_cmd
+ *
+ * Description:
+ *   Send the specified command to the server.
+ *
+ ****************************************************************************/
+
+int ftpc_cmd(struct ftpc_session_s *session, const char *cmd, ...)
+{
+  va_list ap;
+#ifdef CONFIG_FTP_AUTORECONNECT
+  bool reconnect = false;
+#endif
+  int ret;
+
+  /* Verify that we are still connected to the server */
+
+  if (!ftpc_sockconnected(&session->cmd))
+    {
+      nwarn("WARNING: Cmd channel is not connected\n");
+      goto errout;
+    }
+
+  /* Loop, reconnecting as necessary until the command is sent */
+
+#ifdef CONFIG_FTP_AUTORECONNECT
+  for (; ; )
+#endif
+    {
+      /* Send the command */
+
+      va_start(ap, cmd);
+      ret = ftpc_sockvprintf(&session->cmd, cmd, ap);
+      if (ret >= 0)
+        {
+          ret = ftpc_sockprintf(&session->cmd, "\r\n");
+          if (ret >= 0)
+            {
+              ret = ftpc_sockflush(&session->cmd);
+            }
+        }
+
+      va_end(ap);
+
+      /* Check for an error in sending the data */
+
+      if (ret < 0)
+        {
+          nerr("ERROR: Error sending cmd %s: %d\n", cmd, errno);
+          goto errout;
+        }
+
+      /* Get the response to the command */
+
+      ret = fptc_getreply(session);
+      if (ret < 0)
+        {
+          nerr("ERROR: Error getting reply: %d\n", errno);
+          goto errout;
+        }
+
+      /* Check for "421 Service not available, closing control connection" */
+
+      if (session->code == 421)
+        {
+          /* Server is closing the control connection. */
+
+          nwarn("WARNING: Server closed control connection\n");
+
+          /* If we were previously logged in and this is not a QUIT command
+           * then attempt to automatically reconnect to the server.
+           */
+
+#ifdef CONFIG_FTP_AUTORECONNECT
+          if (ftpc_loggedin(session) && strcasecmp(cmd, "QUIT") != 0)
+            {
+              /* Don't try re-connecting more than once */
+
+              if (reconnect)
+                {
+                  nwarn("WARNING: Reconnect failed\n");
+                  goto errout;
+                }
+              else
+                {
+                  /* Try to restore the connection and, if successful,
+                   * continue the loop and try to send the command again.
+                   */
+
+                  ninfo("Reconnecting...\n");
+                  reconnect = true;
+                  ret = ftpc_restore();
+                  if (ret < 0)
+                    {
+                      nwarn("WARNING: Failed to restore the connection");
+                      goto errout;
+                    }
+
+                  continue;
+                }
+            }
+          else
+#endif
+            {
+              /* Don't try to connect, just return an error (retaining
+               * the session response code (421)
+               */
+
+              return ERROR;
+            }
+        }
+
+      /* Error codes 5xx are Permanent Negative Completion. These can be
+       * handled generically for all commands. An example is error code 530
+       * which means 'not logged in'. The reply should include a string to
+       * display to the user
+       */
+
+      else if (session->code > 500 && session->code < 600)
+        {
+          return ERROR;
+        }
+
+      /* The command was successfully sent */
+
+      return OK;
+    }
+
+errout:
+  session->code = -1;
+  return ERROR;
+}