title: how to use cURL on specific interface
body: <p>I am developing a code in c, which simply FTPs the files on FTP server by using curl utility, by following this 
  <a href="http://curl.haxx.se/libcurl/c/ftpupload.html" rel="noreferrer">example</a></p>
  
  <p>now i have one simple thing to do, specify curl to use particular interface (IP) of the server for upload, as other interface of the server is associated with other socket connection.</p>
  
  <p>is there any way to do it?</p>