busybox/networking/ftpgetput.c

/* vi: set sw=4 ts=4: */
/*
 * ftpget
 *
 * Mini implementation of FTP to retrieve a remote file.
 *
 * Copyright (C) 2002 Jeff Angielski, The PTR Group <jeff@theptrgroup.com>
 * Copyright (C) 2002 Glenn McGrath <bug1@iinet.net.au>
 *
 * Based on wget.c by Chip Rosenthal Covad Communications
 * <chip@laserlink.net>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "busybox.h"
#include <getopt.h>

typedef struct ftp_host_info_s {
	char *user;
	char *password;
	struct len_and_sockaddr *lsa;
} ftp_host_info_t;

static smallint verbose_flag;
static smallint do_continue;

static void ftp_die(const char *msg, const char *remote) ATTRIBUTE_NORETURN;
static void ftp_die(const char *msg, const char *remote)
{
	/* Guard against garbage from remote server */
	const char *cp = remote;
	while (*cp >= ' ' && *cp < '\x7f') cp++;
	bb_error_msg_and_die("unexpected server response%s%s: %.*s",
			msg ? " to " : "", msg ? msg : "",
			(int)(cp - remote), remote);
}


static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
{
	unsigned n;
	if (verbose_flag) {
		bb_error_msg("cmd %s %s", s1, s2);
	}

	if (s1) {
		if (s2) {
			fprintf(stream, "%s %s\r\n", s1, s2);
		} else {
			fprintf(stream, "%s\r\n", s1);
		}
	}
	do {
		char *buf_ptr;

		if (fgets(buf, 510, stream) == NULL) {
			bb_perror_msg_and_die("fgets");
		}
		buf_ptr = strstr(buf, "\r\n");
		if (buf_ptr) {
			*buf_ptr = '\0';
		}
	} while (!isdigit(buf[0]) || buf[3] != ' ');

	buf[3] = '\0';
	n = xatou(buf);
	buf[3] = ' ';
	return n;
}

static int xconnect_ftpdata(ftp_host_info_t *server, char *buf)
{
	char *buf_ptr;
	unsigned short port_num;

	/* Response is "NNN garbageN1,N2,N3,N4,P1,P2[)garbage]
	 * Server's IP is N1.N2.N3.N4 (we ignore it)
	 * Server's port for data connection is P1*256+P2 */
	buf_ptr = strrchr(buf, ')');
	if (buf_ptr) *buf_ptr = '\0';

	buf_ptr = strrchr(buf, ',');
	*buf_ptr = '\0';
	port_num = xatoul_range(buf_ptr + 1, 0, 255);

	buf_ptr = strrchr(buf, ',');
	*buf_ptr = '\0';
	port_num += xatoul_range(buf_ptr + 1, 0, 255) * 256;

	set_nport(server->lsa, htons(port_num));
	return xconnect_stream(server->lsa);
}

static FILE *ftp_login(ftp_host_info_t *server)
{
	FILE *control_stream;
	char buf[512];

	/* Connect to the command socket */
	control_stream = fdopen(xconnect_stream(server->lsa), "r+");
	if (control_stream == NULL) {
		/* fdopen failed - extremely unlikely */
		bb_perror_nomsg_and_die();
	}

	if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
		ftp_die(NULL, buf);
	}

	/*  Login to the server */
	switch (ftpcmd("USER", server->user, control_stream, buf)) {
	case 230:
		break;
	case 331:
		if (ftpcmd("PASS", server->password, control_stream, buf) != 230) {
			ftp_die("PASS", buf);
		}
		break;
	default:
		ftp_die("USER", buf);
	}

	ftpcmd("TYPE I", NULL, control_stream, buf);

	return control_stream;
}

#if !ENABLE_FTPGET
int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
		const char *local_path, char *server_path);
#else
static
int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
		const char *local_path, char *server_path)
{
	char buf[512];
/* I think 'filesize' usage here is bogus. Let's see... */
	//off_t filesize = -1;
#define filesize ((off_t)-1)
	int fd_data;
	int fd_local = -1;
	off_t beg_range = 0;

	/* Connect to the data socket */
	if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
		ftp_die("PASV", buf);
	}
	fd_data = xconnect_ftpdata(server, buf);

	if (ftpcmd("SIZE", server_path, control_stream, buf) == 213) {
		//filesize = BB_STRTOOFF(buf + 4, NULL, 10);
		//if (errno || filesize < 0)
		//	ftp_die("SIZE", buf);
	} else {
		do_continue = 0;
	}

	if (LONE_DASH(local_path)) {
		fd_local = STDOUT_FILENO;
		do_continue = 0;
	}

	if (do_continue) {
		struct stat sbuf;
		if (lstat(local_path, &sbuf) < 0) {
			bb_perror_msg_and_die("lstat");
		}
		if (sbuf.st_size > 0) {
			beg_range = sbuf.st_size;
		} else {
			do_continue = 0;
		}
	}

	if (do_continue) {
		sprintf(buf, "REST %"OFF_FMT"d", beg_range);
		if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
			do_continue = 0;
		} else {
			//if (filesize != -1)
			//	filesize -= beg_range;
		}
	}

	if (ftpcmd("RETR", server_path, control_stream, buf) > 150) {
		ftp_die("RETR", buf);
	}

	/* only make a local file if we know that one exists on the remote server */
	if (fd_local == -1) {
		if (do_continue) {
			fd_local = xopen(local_path, O_APPEND | O_WRONLY);
		} else {
			fd_local = xopen(local_path, O_CREAT | O_TRUNC | O_WRONLY);
		}
	}

	/* Copy the file */
	if (filesize != -1) {
		if (bb_copyfd_size(fd_data, fd_local, filesize) == -1)
			return EXIT_FAILURE;
	} else {
		if (bb_copyfd_eof(fd_data, fd_local) == -1)
			return EXIT_FAILURE;
	}

	/* close it all down */
	close(fd_data);
	if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
		ftp_die(NULL, buf);
	}
	ftpcmd("QUIT", NULL, control_stream, buf);

	return EXIT_SUCCESS;
}
#endif

#if !ENABLE_FTPPUT
int ftp_send(ftp_host_info_t *server, FILE *control_stream,
		const char *server_path, char *local_path);
#else
static
int ftp_send(ftp_host_info_t *server, FILE *control_stream,
		const char *server_path, char *local_path)
{
	struct stat sbuf;
	char buf[512];
	int fd_data;
	int fd_local;
	int response;

	/*  Connect to the data socket */
	if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
		ftp_die("PASV", buf);
	}
	fd_data = xconnect_ftpdata(server, buf);

	/* get the local file */
	fd_local = STDIN_FILENO;
	if (NOT_LONE_DASH(local_path)) {
		fd_local = xopen(local_path, O_RDONLY);
		fstat(fd_local, &sbuf);

		sprintf(buf, "ALLO %"OFF_FMT"u", sbuf.st_size);
		response = ftpcmd(buf, NULL, control_stream, buf);
		switch (response) {
		case 200:
		case 202:
			break;
		default:
			close(fd_local);
			ftp_die("ALLO", buf);
			break;
		}
	}
	response = ftpcmd("STOR", server_path, control_stream, buf);
	switch (response) {
	case 125:
	case 150:
		break;
	default:
		close(fd_local);
		ftp_die("STOR", buf);
	}

	/* transfer the file  */
	if (bb_copyfd_eof(fd_local, fd_data) == -1) {
		exit(EXIT_FAILURE);
	}

	/* close it all down */
	close(fd_data);
	if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
		ftp_die("close", buf);
	}
	ftpcmd("QUIT", NULL, control_stream, buf);

	return EXIT_SUCCESS;
}
#endif

#define FTPGETPUT_OPT_CONTINUE	1
#define FTPGETPUT_OPT_VERBOSE	2
#define FTPGETPUT_OPT_USER	4
#define FTPGETPUT_OPT_PASSWORD	8
#define FTPGETPUT_OPT_PORT	16

#if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
static const struct option ftpgetput_long_options[] = {
	{ "continue", 1, NULL, 'c' },
	{ "verbose", 0, NULL, 'v' },
	{ "username", 1, NULL, 'u' },
	{ "password", 1, NULL, 'p' },
	{ "port", 1, NULL, 'P' },
	{ 0, 0, 0, 0 }
};
#endif

int ftpgetput_main(int argc, char **argv)
{
	/* content-length of the file */
	unsigned opt;
	const char *port = "ftp";
	/* socket to ftp server */
	FILE *control_stream;
	/* continue previous transfer (-c) */
	ftp_host_info_t *server;

#if ENABLE_FTPPUT && !ENABLE_FTPGET
# define ftp_action ftp_send
#elif ENABLE_FTPGET && !ENABLE_FTPPUT
# define ftp_action ftp_receive
#else
	int (*ftp_action)(ftp_host_info_t *, FILE *, const char *, char *) = ftp_send;
	/* Check to see if the command is ftpget or ftput */
	if (applet_name[3] == 'g') {
		ftp_action = ftp_receive;
	}
#endif

	/* Set default values */
	server = xmalloc(sizeof(*server));
	server->user = "anonymous";
	server->password = "busybox@";

	/*
	 * Decipher the command line
	 */
#if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
	applet_long_options = ftpgetput_long_options;
#endif
	opt_complementary = "=3"; /* must have 3 params */
	opt = getopt32(argc, argv, "cvu:p:P:", &server->user, &server->password, &port);
	argv += optind;

	/* Process the non-option command line arguments */
	if (opt & FTPGETPUT_OPT_CONTINUE) {
		do_continue = 1;
	}
	if (opt & FTPGETPUT_OPT_VERBOSE) {
		verbose_flag = 1;
	}

	/* We want to do exactly _one_ DNS lookup, since some
	 * sites (i.e. ftp.us.debian.org) use round-robin DNS
	 * and we want to connect to only one IP... */
	server->lsa = host2sockaddr(argv[0], bb_lookup_port(port, "tcp", 21));
	if (verbose_flag) {
		printf("Connecting to %s [%s]\n", argv[0],
			xmalloc_sockaddr2dotted(&server->lsa->sa, server->lsa->len));
	}

	/*  Connect/Setup/Configure the FTP session */
	control_stream = ftp_login(server);

	return ftp_action(server, control_stream, argv[1], argv[2]);
}
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 "busybox.h"
17	#include <getopt.h>
18
19	typedef struct ftp_host_info_s {
20	char *user;
21	char *password;
22	struct len_and_sockaddr *lsa;
23	} ftp_host_info_t;
24
25	static smallint verbose_flag;
26	static smallint do_continue;
27
28	static void ftp_die(const char msg, const char remote) ATTRIBUTE_NORETURN;
29	static 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
40	static 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
72	static 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 P1256+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
95	static 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
130	int ftp_receive(ftp_host_info_t server, FILE control_stream,
131	const char local_path, char server_path);
132	#else
133	static
134	int 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
220	int ftp_send(ftp_host_info_t server, FILE control_stream,
221	const char server_path, char local_path);
222	#else
223	static
224	int 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
290	static const struct option ftpgetput_long_options[] = {
291	{ "continue", 1, NULL, 'c' },
292	{ "verbose", 0, NULL, 'v' },
293	{ "username", 1, NULL, 'u' },
294	{ "password", 1, NULL, 'p' },
295	{ "port", 1, NULL, 'P' },
296	{ 0, 0, 0, 0 }
297	};
298	#endif
299
300	int 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_long_options;
332	#endif
333	opt_complementary = "=3"; /* must have 3 params */
334	opt = getopt32(argc, 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 = host2sockaddr(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, server->lsa->len));
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	}