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FTP Error 425

From: André Ogrodowski <>
Date: Mon, 9 Mar 2015 08:12:45 +0000


i have a problem with a file-upload over FTP from a Raspberry PI (OS: Paspbian) using libcurl to a Windows 7 PC. If I use Filezilla instead of curl the fileupload is possible.
can somebody help me?
Windows File is disabled.

Thanks for you support.

FTP-Client Code on the Raspberry Pi:

#include <stdio.h>
#include <string.h>

#include <curl/curl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#ifdef WIN32
#include <io.h>
#include <unistd.h>

int main(void)
  char filePath[] = "/home/pi/LogFiles/Logfile.txt";
  struct stat fileInfo;
  curl_off_t fsize;
  FILE *fp = NULL;
  CURLcode err;
  struct curl_slist *headerlist=NULL;
  CURL* handle = NULL;

  static const char buf_1 [] = "RNFR "; //UPLOAD_FILE_AS;
  static const char buf_2 [] = "RNTO "; //RENAME_FILE_TO;

  stat(filePath, &fileInfo);

  fsize = fileInfo.st_size;

  fopen(filePath, "r");

  handle = curl_easy_init();

  headerlist = curl_slist_append(headerlist, buf_1);
  headerlist = curl_slist_append(headerlist, buf_2);
  curl_easy_setopt(handle, CURLOPT_POSTQUOTE, headerlist);
  curl_easy_setopt(handle, CURLOPT_VERBOSE, 1L);
  curl_easy_setopt(handle, CURLOPT_UPLOAD, 1L);
  curl_easy_setopt(handle, CURLOPT_FTP_CREATE_MISSING_DIRS, 1L);
  curl_easy_setopt(handle, CURLOPT_PORT, 21L);
  curl_easy_setopt(handle, CURLOPT_URL, "ftp://Nutzer:1234@");
  curl_easy_setopt(handle, CURLOPT_INFILESIZE_LARGE, (curl_off_t) fileInfo.st_size);
  curl_easy_setopt(handle, CURLOPT_READDATA, fp);

  err = curl_easy_perform(handle);


  return 0;

Logging at Raspberry PI :
* About to connect() to port 21 (#0)
* Trying
* connected
* Connected to ( port 21 (#0)
* FTP 0xfbe3b8 state change from STOP to WAIT220
< 220 Service ready for new user. (
> USER Nutzer
* FTP 0xfbe3b8 state change from WAIT220 to USER
< 331 User name okay, need password.
> PASS 1234
* FTP 0xfbe3b8 state change from USER to PASS
< 230 User logged in, proceed.
* FTP 0xfbe3b8 state change from PASS to PWD
< 257 "/" aktuelles Verzeichnis ist das Basis-Verzeichnis (C:\Users\ogrodowski\Desktop\FTP)
* Entry path is '/'
* FTP 0xfbe3b8 state change from PWD to STOP
* protocol connect phase DONE
* DO phase starts
* FTP 0xfbe3b8 state change from STOP to PASV
* Connect data stream passively
< 502 Command not implemented.
* disabling EPSV usage
< 227 Entering Passive Mode (192,168,70,42,207,253)
* Trying
* connected
* Connecting to ( port 53245
* FTP 0xfbe3b8 state change from PASV to STOP
* DO phase is complete
* FTP 0xfbe3b8 state change from STOP to STOR_TYPE
< 200 Type set to TypeI
> STOR logfile.txt
* FTP 0xfbe3b8 state change from STOR_TYPE to STOR
< 425 Can't open data connection.
* Failed FTP upload: 425
* DO-MORE phase ends with 25
* Remembering we are in dir ""
* Uploaded unaligned file size (0 out of 384 bytes)
* Connection #0 to host left intact
* Upload failed (at start/before it took off)
Segmentation fault

(program exited with code: 139)
Press return to continue

Freundliche Grüße / Best regards

Andre Ogrodowski
TBTV, Systemtestingenieur / System Test Engineer

MELAG Medizintechnik oHG / MELAG Medical Technology
Geneststraße 6-10
D-10829 Berlin
Tel./phone: +49 30 757911-1066
Fax: +49 30 757911-99


MELAG Medizintechnik oHG Sitz Berlin Registergericht AG Charlottenburg HRA 21333 B

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Received on 2015-03-09