reply.c

   1 /*
   2  * User FTP Server,  Share folders over FTP without being root.
   3  * Copyright (C) 2008  Isaac Jurado
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free Software
   7  * Foundation; either version 2 of the License, or (at your option) any later
   8  * version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  18  */
  19
  20 #include "uftps.h"
  21 #ifndef __MINGW32__
  22 #  include <sys/socket.h>
  23 #endif
  24
  25
  26 /*
  27  * Send a reply to the client over the control connection.  Not a complex
  28  * function at all, but necessary almost everywhere else.
  29  */
  30 void reply (const char *str, int len)
  31 {
  32         int  b;
  33
  34         debug("Reply   : %.*s", len - 2, str);
  35
  36         do {
  37                 b = send(SS.control_sk, str, len, 0);
  38                 if (b == -1)
  39                         fatal("Control channel output");
  40
  41                 str += b;
  42                 len -= b;
  43         } while (len > 0);
  44 }
  45
  46
  47 /*
  48  * Send reply over the current data connection.  It succeeds (return value 0)
  49  * when all data has been transferred.  It fails otherwise (return value -1),
  50  * that is, either by an incomplete transfer or a system error.
  51  */
  52 int data_reply (const char *data, int len)
  53 {
  54         int  b, l = 0;
  55
  56         while (l < len)
  57         {
  58                 b = send(SS.data_sk, &data[l], len - l, 0);
  59                 if (b <= 0)
  60                 {
  61                         error("Sending listing data");
  62                         return -1;
  63                 }
  64
  65                 l += b;
  66         }
  67
  68         return 0;
  69 }
  70