| /**************************************************************************** |
| * 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" |
| |
| /**************************************************************************** |
| * Pre-processor Definitions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Types |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Data |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Public Data |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Private Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * 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; |
| } |
