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/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
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 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
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 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
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 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
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 *
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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
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 *
 ***************************************************************************/
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#include "curl_setup.h"
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
#endif
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#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_UTSNAME_H
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#include <sys/utsname.h>
#ifdef HAVE_NETDB_H
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#include <netdb.h>
#endif
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#include <in.h>
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#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
#undef in_addr_t
#define in_addr_t unsigned long
#endif

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#include <curl/curl.h>
#include "urldata.h"
#include "sendf.h"
#include "if2ip.h"
#include "hostip.h"
#include "progress.h"
#include "transfer.h"
#include "escape.h"
#include "http.h" /* for HTTP proxy tunnel stuff */
#include "socks.h"
#include "ftp.h"
#include "fileinfo.h"
#include "ftplistparser.h"
#include "strtoofft.h"
#include "strequal.h"
#include "sslgen.h"
#include "connect.h"
#include "strerror.h"
#include "inet_ntop.h"
#include "inet_pton.h"
#include "select.h"
#include "parsedate.h" /* for the week day and month names */
#include "sockaddr.h" /* required for Curl_sockaddr_storage */
#include "multiif.h"
#include "url.h"
#include "rawstr.h"
#include "speedcheck.h"
#include "warnless.h"
#include "http_proxy.h"
#include "non-ascii.h"
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#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>

#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
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#ifdef CURL_DISABLE_VERBOSE_STRINGS
#define ftp_pasv_verbose(a,b,c,d)  Curl_nop_stmt
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#endif

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/* Local API functions */
#ifndef DEBUGBUILD
static void _state(struct connectdata *conn,
                   ftpstate newstate);
#define state(x,y) _state(x,y)
#else
static void _state(struct connectdata *conn,
                   ftpstate newstate,
                   int lineno);
#define state(x,y) _state(x,y,__LINE__)
#endif

static CURLcode ftp_sendquote(struct connectdata *conn,
                              struct curl_slist *quote);
static CURLcode ftp_quit(struct connectdata *conn);
static CURLcode ftp_parse_url_path(struct connectdata *conn);
static CURLcode ftp_regular_transfer(struct connectdata *conn, bool *done);
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#ifndef CURL_DISABLE_VERBOSE_STRINGS
static void ftp_pasv_verbose(struct connectdata *conn,
                             Curl_addrinfo *ai,
                             char *newhost, /* ascii version */
                             int port);
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#endif
static CURLcode ftp_state_prepare_transfer(struct connectdata *conn);
static CURLcode ftp_state_mdtm(struct connectdata *conn);
static CURLcode ftp_state_quote(struct connectdata *conn,
                                bool init, ftpstate instate);
static CURLcode ftp_nb_type(struct connectdata *conn,
                            bool ascii, ftpstate newstate);
static int ftp_need_type(struct connectdata *conn,
static CURLcode ftp_do(struct connectdata *conn, bool *done);
static CURLcode ftp_done(struct connectdata *conn,
static CURLcode ftp_connect(struct connectdata *conn, bool *done);
static CURLcode ftp_disconnect(struct connectdata *conn, bool dead_connection);
static CURLcode ftp_do_more(struct connectdata *conn, int *completed);
static CURLcode ftp_multi_statemach(struct connectdata *conn, bool *done);
static int ftp_getsock(struct connectdata *conn, curl_socket_t *socks,
static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
                              int numsocks);
static CURLcode ftp_doing(struct connectdata *conn,
static CURLcode ftp_setup_connection(struct connectdata * conn);
static CURLcode init_wc_data(struct connectdata *conn);
static CURLcode wc_statemach(struct connectdata *conn);

static void wc_data_dtor(void *ptr);

static CURLcode ftp_state_retr(struct connectdata *conn, curl_off_t filesize);
static CURLcode ftp_readresp(curl_socket_t sockfd,
                             struct pingpong *pp,
                             int *ftpcode,
                             size_t *size);
static CURLcode ftp_dophase_done(struct connectdata *conn,
                                 bool connected);
#define PPSENDF(x,y,z)  if((result = Curl_pp_sendf(x,y,z)) != CURLE_OK) \
/*
 * FTP protocol handler.
 */

const struct Curl_handler Curl_handler_ftp = {
  ftp_setup_connection,            /* setup_connection */
  ftp_do,                          /* do_it */
  ftp_done,                        /* done */
  ftp_do_more,                     /* do_more */
  ftp_connect,                     /* connect_it */
  ftp_multi_statemach,             /* connecting */
  ftp_doing,                       /* doing */
  ftp_getsock,                     /* proto_getsock */
  ftp_getsock,                     /* doing_getsock */
  ftp_domore_getsock,              /* domore_getsock */
  ZERO_NULL,                       /* readwrite */
  CURLPROTO_FTP,                   /* protocol */
  PROTOPT_DUAL | PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD
  | PROTOPT_NOURLQUERY /* flags */
};


#ifdef USE_SSL
/*
 * FTPS protocol handler.
 */

const struct Curl_handler Curl_handler_ftps = {
  ftp_setup_connection,            /* setup_connection */
  ftp_do_more,                     /* do_more */
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