1#ifndef HEADER_CURL_FTP_H
2#define HEADER_CURL_FTP_H
3/***************************************************************************
4 * _ _ ____ _
5 * Project ___| | | | _ \| |
6 * / __| | | | |_) | |
7 * | (__| |_| | _ <| |___
8 * \___|\___/|_| \_\_____|
9 *
10 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
11 *
12 * This software is licensed as described in the file COPYING, which
13 * you should have received as part of this distribution. The terms
14 * are also available at https://curl.haxx.se/docs/copyright.html.
15 *
16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
17 * copies of the Software, and permit persons to whom the Software is
18 * furnished to do so, under the terms of the COPYING file.
19 *
20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
21 * KIND, either express or implied.
22 *
23 ***************************************************************************/
24
25#include "pingpong.h"
26
27#ifndef CURL_DISABLE_FTP
28extern const struct Curl_handler Curl_handler_ftp;
29
30#ifdef USE_SSL
31extern const struct Curl_handler Curl_handler_ftps;
32#endif
33
34CURLcode Curl_ftpsend(struct connectdata *, const char *cmd);
35CURLcode Curl_GetFTPResponse(ssize_t *nread, struct connectdata *conn,
36 int *ftpcode);
37#endif /* CURL_DISABLE_FTP */
38
39/****************************************************************************
40 * FTP unique setup
41 ***************************************************************************/
42typedef enum {
43 FTP_STOP, /* do nothing state, stops the state machine */
44 FTP_WAIT220, /* waiting for the initial 220 response immediately after
45 a connect */
46 FTP_AUTH,
47 FTP_USER,
48 FTP_PASS,
49 FTP_ACCT,
50 FTP_PBSZ,
51 FTP_PROT,
52 FTP_CCC,
53 FTP_PWD,
54 FTP_SYST,
55 FTP_NAMEFMT,
56 FTP_QUOTE, /* waiting for a response to a command sent in a quote list */
57 FTP_RETR_PREQUOTE,
58 FTP_STOR_PREQUOTE,
59 FTP_POSTQUOTE,
60 FTP_CWD, /* change dir */
61 FTP_MKD, /* if the dir didn't exist */
62 FTP_MDTM, /* to figure out the datestamp */
63 FTP_TYPE, /* to set type when doing a head-like request */
64 FTP_LIST_TYPE, /* set type when about to do a dir list */
65 FTP_RETR_TYPE, /* set type when about to RETR a file */
66 FTP_STOR_TYPE, /* set type when about to STOR a file */
67 FTP_SIZE, /* get the remote file's size for head-like request */
68 FTP_RETR_SIZE, /* get the remote file's size for RETR */
69 FTP_STOR_SIZE, /* get the size for STOR */
70 FTP_REST, /* when used to check if the server supports it in head-like */
71 FTP_RETR_REST, /* when asking for "resume" in for RETR */
72 FTP_PORT, /* generic state for PORT, LPRT and EPRT, check count1 */
73 FTP_PRET, /* generic state for PRET RETR, PRET STOR and PRET LIST/NLST */
74 FTP_PASV, /* generic state for PASV and EPSV, check count1 */
75 FTP_LIST, /* generic state for LIST, NLST or a custom list command */
76 FTP_RETR,
77 FTP_STOR, /* generic state for STOR and APPE */
78 FTP_QUIT,
79 FTP_LAST /* never used */
80} ftpstate;
81
82struct ftp_parselist_data; /* defined later in ftplistparser.c */
83
84struct ftp_wc {
85 struct ftp_parselist_data *parser;
86
87 struct {
88 curl_write_callback write_function;
89 FILE *file_descriptor;
90 } backup;
91};
92
93typedef enum {
94 FTPFILE_MULTICWD = 1, /* as defined by RFC1738 */
95 FTPFILE_NOCWD = 2, /* use SIZE / RETR / STOR on the full path */
96 FTPFILE_SINGLECWD = 3 /* make one CWD, then SIZE / RETR / STOR on the
97 file */
98} curl_ftpfile;
99
100/* This FTP struct is used in the Curl_easy. All FTP data that is
101 connection-oriented must be in FTP_conn to properly deal with the fact that
102 perhaps the Curl_easy is changed between the times the connection is
103 used. */
104struct FTP {
105 char *user; /* user name string */
106 char *passwd; /* password string */
107 char *path; /* points to the urlpieces struct field */
108 char *pathalloc; /* if non-NULL a pointer to an allocated path */
109
110 /* transfer a file/body or not, done as a typedefed enum just to make
111 debuggers display the full symbol and not just the numerical value */
112 curl_pp_transfer transfer;
113 curl_off_t downloadsize;
114};
115
116
117/* ftp_conn is used for struct connection-oriented data in the connectdata
118 struct */
119struct ftp_conn {
120 struct pingpong pp;
121 char *entrypath; /* the PWD reply when we logged on */
122 char **dirs; /* realloc()ed array for path components */
123 int dirdepth; /* number of entries used in the 'dirs' array */
124 char *file; /* url-decoded file name (or path) */
125 bool dont_check; /* Set to TRUE to prevent the final (post-transfer)
126 file size and 226/250 status check. It should still
127 read the line, just ignore the result. */
128 bool ctl_valid; /* Tells Curl_ftp_quit() whether or not to do anything. If
129 the connection has timed out or been closed, this
130 should be FALSE when it gets to Curl_ftp_quit() */
131 bool cwddone; /* if it has been determined that the proper CWD combo
132 already has been done */
133 int cwdcount; /* number of CWD commands issued */
134 bool cwdfail; /* set TRUE if a CWD command fails, as then we must prevent
135 caching the current directory */
136 bool wait_data_conn; /* this is set TRUE if data connection is waited */
137 char *prevpath; /* url-decoded conn->path from the previous transfer */
138 char transfertype; /* set by ftp_transfertype for use by Curl_client_write()a
139 and others (A/I or zero) */
140 int count1; /* general purpose counter for the state machine */
141 int count2; /* general purpose counter for the state machine */
142 int count3; /* general purpose counter for the state machine */
143 ftpstate state; /* always use ftp.c:state() to change state! */
144 ftpstate state_saved; /* transfer type saved to be reloaded after
145 data connection is established */
146 curl_off_t retr_size_saved; /* Size of retrieved file saved */
147 char *server_os; /* The target server operating system. */
148 curl_off_t known_filesize; /* file size is different from -1, if wildcard
149 LIST parsing was done and wc_statemach set
150 it */
151 /* newhost is the (allocated) IP addr or host name to connect the data
152 connection to */
153 char *newhost; /* this is the pair to connect the DATA... */
154 unsigned short newport; /* connection to */
155
156};
157
158#define DEFAULT_ACCEPT_TIMEOUT 60000 /* milliseconds == one minute */
159
160#endif /* HEADER_CURL_FTP_H */
161