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/****************************************************************************
* apps/netutils/ftpc/ftpc_utils.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <string.h>
#include "ftpc_internal.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ftpc_nibble
*
* Description:
* Convert a ASCII hex 'digit' to binary
*
****************************************************************************/
int ftpc_nibble(char ch)
{
if (ch >= '0' && ch <= '9')
{
return (unsigned int)ch - '0';
}
else if (ch >= 'A' && ch <= 'F')
{
return (unsigned int)ch - 'A' + 10;
}
else if (ch >= 'a' && ch <= 'f')
{
return (unsigned int)ch - 'a' + 10;
}
return ERROR;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: ftpc_reset
*
* Description:
* Reset the FTP session.
*
****************************************************************************/
void ftpc_reset(struct ftpc_session_s *session)
{
ftpc_sockclose(&session->data);
ftpc_sockclose(&session->cmd);
free(session->uname);
session->uname = NULL;
free(session->pwd);
session->pwd = NULL;
free(session->initrdir);
session->initrdir = NULL;
session->flags &= ~FTPC_FLAGS_CLEAR;
session->flags |= FTPC_FLAGS_SET;
session->xfrmode = FTPC_XFRMODE_UNKNOWN;
session->code = 0;
session->replytimeo = CONFIG_FTP_DEFTIMEO * CLOCKS_PER_SEC;
session->conntimeo = CONFIG_FTP_DEFTIMEO * CLOCKS_PER_SEC;
}
/****************************************************************************
* Name: ftpc_currdir
*
* Description:
* Update the remote current working directory
*
****************************************************************************/
void ftpc_currdir(struct ftpc_session_s *session)
{
free(session->prevrdir);
session->prevrdir = session->currdir;
session->currdir = ftpc_rpwd((SESSION)session);
}
/****************************************************************************
* Name: ftpc_lpwd
*
* Description:
* Return the local current working directory. NOTE: This is a peek at
* a global copy. The caller should call strdup if it wants to keep it.
*
****************************************************************************/
FAR const char *ftpc_lpwd(void)
{
#ifndef CONFIG_DISABLE_ENVIRON
FAR const char *val;
val = getenv("PWD");
if (!val)
{
val = CONFIG_FTP_TMPDIR;
}
return val;
#else
return CONFIG_FTP_TMPDIR;
#endif
}
/****************************************************************************
* Name: ftpc_stripcrlf
*
* Description:
* Strip any trailing carriage returns or line feeds from a string (by
* overwriting them with NUL characters).
*
****************************************************************************/
void ftpc_stripcrlf(FAR char *str)
{
FAR char *ptr;
int len;
if (str)
{
len = strlen(str);
if (len > 0)
{
ptr = str + len - 1;
while (*ptr == '\r' || *ptr == '\n')
{
*ptr = '\0';
ptr--;
}
}
}
}
/****************************************************************************
* Name: ftpc_stripslash
*
* Description:
* Strip any trailing slashes from a string (by overwriting them with NUL
* characters.
*
****************************************************************************/
void ftpc_stripslash(FAR char *str)
{
FAR char *ptr;
int len;
if (str)
{
len = strlen(str);
if (len > 1)
{
ptr = str + len - 1;
if (*ptr == '/')
{
*ptr = '\0';
}
}
}
}
/****************************************************************************
* Name: ftpc_dequote
*
* Description:
* Convert quoted hexadecimal constants to binary values.
*
****************************************************************************/
FAR char *ftpc_dequote(FAR const char *str)
{
FAR char *allocstr = NULL;
FAR char *ptr;
int ms;
int ls;
int len;
if (str)
{
/* Allocate space for a modifiable copy of the string */
len = strlen(str);
allocstr = (FAR char*)malloc(len+1);
if (allocstr)
{
/* Search the string */
ptr = allocstr;
while (*str)
{
/* Check for a quoted hex value */
if (str[0] == '%')
{
/* Extract the hex value */
ms = ftpc_nibble(str[1]);
if (ms >= 0)
{
ls = ftpc_nibble(str[2]);
if (ls >= 0)
{
/* Save the binary value and skip ahead by 3 */
*ptr++ = (char)(ms << 8 | ls);
str += 3;
continue;
}
}
}
/* Just transfer the character */
*ptr++ = *str++;
}
/* NUL terminate */
*ptr = '\0';
}
}
return allocstr;
}
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