source: MondoRescue/branches/2.2.5/mindi-busybox/networking/ftpgetput.c@ 1765

Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 16 years ago

Update to busybox 1.7.2
File size: 8.2 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * ftpget
4 *
5 * Mini implementation of FTP to retrieve a remote file.
6 *
7 * Copyright (C) 2002 Jeff Angielski, The PTR Group <jeff@theptrgroup.com>
8 * Copyright (C) 2002 Glenn McGrath <bug1@iinet.net.au>
9 *
10 * Based on wget.c by Chip Rosenthal Covad Communications
11 * <chip@laserlink.net>
12 *
13 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
14 */
15
16#include <getopt.h>
17#include "libbb.h"
18
19typedef struct ftp_host_info_s {
20 const char *user;
21 const char *password;
22 struct len_and_sockaddr *lsa;
23} ftp_host_info_t;
24
25static smallint verbose_flag;
26static smallint do_continue;
27
28static void ftp_die(const char *msg, const char *remote) ATTRIBUTE_NORETURN;
29static void ftp_die(const char *msg, const char *remote)
30{
31 /* Guard against garbage from remote server */
32 const char *cp = remote;
33 while (*cp >= ' ' && *cp < '\x7f') cp++;
34 bb_error_msg_and_die("unexpected server response%s%s: %.*s",
35 msg ? " to " : "", msg ? msg : "",
36 (int)(cp - remote), remote);
37}
38
39
40static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
41{
42 unsigned n;
43 if (verbose_flag) {
44 bb_error_msg("cmd %s %s", s1, s2);
45 }
46
47 if (s1) {
48 if (s2) {
49 fprintf(stream, "%s %s\r\n", s1, s2);
50 } else {
51 fprintf(stream, "%s\r\n", s1);
52 }
53 }
54 do {
55 char *buf_ptr;
56
57 if (fgets(buf, 510, stream) == NULL) {
58 bb_perror_msg_and_die("fgets");
59 }
60 buf_ptr = strstr(buf, "\r\n");
61 if (buf_ptr) {
62 *buf_ptr = '\0';
63 }
64 } while (!isdigit(buf[0]) || buf[3] != ' ');
65
66 buf[3] = '\0';
67 n = xatou(buf);
68 buf[3] = ' ';
69 return n;
70}
71
72static int xconnect_ftpdata(ftp_host_info_t *server, char *buf)
73{
74 char *buf_ptr;
75 unsigned short port_num;
76
77 /* Response is "NNN garbageN1,N2,N3,N4,P1,P2[)garbage]
78 * Server's IP is N1.N2.N3.N4 (we ignore it)
79 * Server's port for data connection is P1*256+P2 */
80 buf_ptr = strrchr(buf, ')');
81 if (buf_ptr) *buf_ptr = '\0';
82
83 buf_ptr = strrchr(buf, ',');
84 *buf_ptr = '\0';
85 port_num = xatoul_range(buf_ptr + 1, 0, 255);
86
87 buf_ptr = strrchr(buf, ',');
88 *buf_ptr = '\0';
89 port_num += xatoul_range(buf_ptr + 1, 0, 255) * 256;
90
91 set_nport(server->lsa, htons(port_num));
92 return xconnect_stream(server->lsa);
93}
94
95static FILE *ftp_login(ftp_host_info_t *server)
96{
97 FILE *control_stream;
98 char buf[512];
99
100 /* Connect to the command socket */
101 control_stream = fdopen(xconnect_stream(server->lsa), "r+");
102 if (control_stream == NULL) {
103 /* fdopen failed - extremely unlikely */
104 bb_perror_nomsg_and_die();
105 }
106
107 if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
108 ftp_die(NULL, buf);
109 }
110
111 /* Login to the server */
112 switch (ftpcmd("USER", server->user, control_stream, buf)) {
113 case 230:
114 break;
115 case 331:
116 if (ftpcmd("PASS", server->password, control_stream, buf) != 230) {
117 ftp_die("PASS", buf);
118 }
119 break;
120 default:
121 ftp_die("USER", buf);
122 }
123
124 ftpcmd("TYPE I", NULL, control_stream, buf);
125
126 return control_stream;
127}
128
129#if !ENABLE_FTPGET
130int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
131 const char *local_path, char *server_path);
132#else
133static
134int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
135 const char *local_path, char *server_path)
136{
137 char buf[512];
138/* I think 'filesize' usage here is bogus. Let's see... */
139 //off_t filesize = -1;
140#define filesize ((off_t)-1)
141 int fd_data;
142 int fd_local = -1;
143 off_t beg_range = 0;
144
145 /* Connect to the data socket */
146 if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
147 ftp_die("PASV", buf);
148 }
149 fd_data = xconnect_ftpdata(server, buf);
150
151 if (ftpcmd("SIZE", server_path, control_stream, buf) == 213) {
152 //filesize = BB_STRTOOFF(buf + 4, NULL, 10);
153 //if (errno || filesize < 0)
154 // ftp_die("SIZE", buf);
155 } else {
156 do_continue = 0;
157 }
158
159 if (LONE_DASH(local_path)) {
160 fd_local = STDOUT_FILENO;
161 do_continue = 0;
162 }
163
164 if (do_continue) {
165 struct stat sbuf;
166 if (lstat(local_path, &sbuf) < 0) {
167 bb_perror_msg_and_die("lstat");
168 }
169 if (sbuf.st_size > 0) {
170 beg_range = sbuf.st_size;
171 } else {
172 do_continue = 0;
173 }
174 }
175
176 if (do_continue) {
177 sprintf(buf, "REST %"OFF_FMT"d", beg_range);
178 if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
179 do_continue = 0;
180 } else {
181 //if (filesize != -1)
182 // filesize -= beg_range;
183 }
184 }
185
186 if (ftpcmd("RETR", server_path, control_stream, buf) > 150) {
187 ftp_die("RETR", buf);
188 }
189
190 /* only make a local file if we know that one exists on the remote server */
191 if (fd_local == -1) {
192 if (do_continue) {
193 fd_local = xopen(local_path, O_APPEND | O_WRONLY);
194 } else {
195 fd_local = xopen(local_path, O_CREAT | O_TRUNC | O_WRONLY);
196 }
197 }
198
199 /* Copy the file */
200 if (filesize != -1) {
201 if (bb_copyfd_size(fd_data, fd_local, filesize) == -1)
202 return EXIT_FAILURE;
203 } else {
204 if (bb_copyfd_eof(fd_data, fd_local) == -1)
205 return EXIT_FAILURE;
206 }
207
208 /* close it all down */
209 close(fd_data);
210 if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
211 ftp_die(NULL, buf);
212 }
213 ftpcmd("QUIT", NULL, control_stream, buf);
214
215 return EXIT_SUCCESS;
216}
217#endif
218
219#if !ENABLE_FTPPUT
220int ftp_send(ftp_host_info_t *server, FILE *control_stream,
221 const char *server_path, char *local_path);
222#else
223static
224int ftp_send(ftp_host_info_t *server, FILE *control_stream,
225 const char *server_path, char *local_path)
226{
227 struct stat sbuf;
228 char buf[512];
229 int fd_data;
230 int fd_local;
231 int response;
232
233 /* Connect to the data socket */
234 if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
235 ftp_die("PASV", buf);
236 }
237 fd_data = xconnect_ftpdata(server, buf);
238
239 /* get the local file */
240 fd_local = STDIN_FILENO;
241 if (NOT_LONE_DASH(local_path)) {
242 fd_local = xopen(local_path, O_RDONLY);
243 fstat(fd_local, &sbuf);
244
245 sprintf(buf, "ALLO %"OFF_FMT"u", sbuf.st_size);
246 response = ftpcmd(buf, NULL, control_stream, buf);
247 switch (response) {
248 case 200:
249 case 202:
250 break;
251 default:
252 close(fd_local);
253 ftp_die("ALLO", buf);
254 break;
255 }
256 }
257 response = ftpcmd("STOR", server_path, control_stream, buf);
258 switch (response) {
259 case 125:
260 case 150:
261 break;
262 default:
263 close(fd_local);
264 ftp_die("STOR", buf);
265 }
266
267 /* transfer the file */
268 if (bb_copyfd_eof(fd_local, fd_data) == -1) {
269 exit(EXIT_FAILURE);
270 }
271
272 /* close it all down */
273 close(fd_data);
274 if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
275 ftp_die("close", buf);
276 }
277 ftpcmd("QUIT", NULL, control_stream, buf);
278
279 return EXIT_SUCCESS;
280}
281#endif
282
283#define FTPGETPUT_OPT_CONTINUE 1
284#define FTPGETPUT_OPT_VERBOSE 2
285#define FTPGETPUT_OPT_USER 4
286#define FTPGETPUT_OPT_PASSWORD 8
287#define FTPGETPUT_OPT_PORT 16
288
289#if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
290static const char ftpgetput_longopts[] ALIGN1 =
291 "continue\0" Required_argument "c"
292 "verbose\0" No_argument "v"
293 "username\0" Required_argument "u"
294 "password\0" Required_argument "p"
295 "port\0" Required_argument "P"
296 ;
297#endif
298
299int ftpgetput_main(int argc, char **argv);
300int ftpgetput_main(int argc, char **argv)
301{
302 /* content-length of the file */
303 unsigned opt;
304 const char *port = "ftp";
305 /* socket to ftp server */
306 FILE *control_stream;
307 /* continue previous transfer (-c) */
308 ftp_host_info_t *server;
309
310#if ENABLE_FTPPUT && !ENABLE_FTPGET
311# define ftp_action ftp_send
312#elif ENABLE_FTPGET && !ENABLE_FTPPUT
313# define ftp_action ftp_receive
314#else
315 int (*ftp_action)(ftp_host_info_t *, FILE *, const char *, char *) = ftp_send;
316 /* Check to see if the command is ftpget or ftput */
317 if (applet_name[3] == 'g') {
318 ftp_action = ftp_receive;
319 }
320#endif
321
322 /* Set default values */
323 server = xmalloc(sizeof(*server));
324 server->user = "anonymous";
325 server->password = "busybox@";
326
327 /*
328 * Decipher the command line
329 */
330#if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
331 applet_long_options = ftpgetput_longopts;
332#endif
333 opt_complementary = "=3"; /* must have 3 params */
334 opt = getopt32(argv, "cvu:p:P:", &server->user, &server->password, &port);
335 argv += optind;
336
337 /* Process the non-option command line arguments */
338 if (opt & FTPGETPUT_OPT_CONTINUE) {
339 do_continue = 1;
340 }
341 if (opt & FTPGETPUT_OPT_VERBOSE) {
342 verbose_flag = 1;
343 }
344
345 /* We want to do exactly _one_ DNS lookup, since some
346 * sites (i.e. ftp.us.debian.org) use round-robin DNS
347 * and we want to connect to only one IP... */
348 server->lsa = xhost2sockaddr(argv[0], bb_lookup_port(port, "tcp", 21));
349 if (verbose_flag) {
350 printf("Connecting to %s (%s)\n", argv[0],
351 xmalloc_sockaddr2dotted(&server->lsa->sa));
352 }
353
354 /* Connect/Setup/Configure the FTP session */
355 control_stream = ftp_login(server);
356
357 return ftp_action(server, control_stream, argv[1], argv[2]);
358}
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