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I am trying to download file using FTP, and in between if connection terminates then it should resume from where it was stop. My problem is that using following code snippet I able to continue download if I close connection and then again connect it, but if I am do so at server site then I am not able to resume download, and program goes into infinites state. #include <stdio.h> #include <curl/curl.h> /* * This is an example showing how to get a single file from an FTP server. * It delays the actual destination file creation until the first write * callback so that it won't create an empty file in case the remote file * doesn't exist or something else fails. */ struct FtpFile { const char *filename; FILE *stream; }; static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream) { struct FtpFile *out=(struct FtpFile *)stream; if(out && !out->stream) { /* open file for writing */ out->stream=fopen(out->filename, "wb"); if(!out->stream) return -1; /* failure, can't open file to write */ } return fwrite(buffer, size, nmemb, out->stream); } int main(void) { CURL *curl; CURLcode res; struct FtpFile ftpfile={ "dev.zip", /* name to store the file as if succesful */ NULL }; curl_global_init(CURL_GLOBAL_DEFAULT); curl = curl_easy_init(); if(curl) { /* * You better replace the URL with one that works! */ curl_easy_setopt(curl, CURLOPT_URL, "ftp://root:password@192.168.10.1/dev.zip"); /* Define our callback to get called when there's data to be written */ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite); /* Set a pointer to our struct to pass to the callback */ curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile); /* Switch on full protocol/debug output */ curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); res = curl_easy_perform(curl); /* always cleanup */ curl_ea

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