init_session.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 #include <arpa/inet.h>
  22
  23
  24 void init_session (int control_sk)
  25 {
  26         int        e;
  27         socklen_t  sai_len;
  28
  29         /* Basic initializations */
  30         SS.control_sk   = control_sk;
  31         SS.passive_sk   = -1;
  32         SS.data_sk      = -1;
  33         SS.input_offset = 0;
  34         SS.input_len    = 0;
  35         SS.passive_mode = 0;
  36         SS.file_offset  = 0;
  37         SS.arg          = NULL;
  38
  39         /* Set CWD to root */
  40         SS.cwd[0]  = '.';
  41         SS.cwd[1]  = '/';
  42         SS.cwd[2]  = '\0';
  43         SS.cwd_len = 3;
  44
  45         /* Get local an remote addresses to perform some safety checks when
  46          * opening data connections */
  47         sai_len = sizeof(struct sockaddr_in);
  48         e = getsockname(control_sk, (struct sockaddr *) &SS.local_address,
  49                         &sai_len);
  50         if (e == -1)
  51                 fatal("Getting local socket address");
  52
  53         sai_len = sizeof(struct sockaddr_in);
  54         e = getpeername(control_sk, (struct sockaddr *) &SS.client_address,
  55                         &sai_len);
  56         if (e == -1)
  57                 fatal("Getting remote socket address");
  58
  59         notice("Attending new client from %s",
  60                inet_ntoa(SS.client_address.sin_addr));
  61         reply_c("220 User FTP Server ready.\r\n");
  62 }
  63