networking/ftpgetput.c - codeaurora/busybox - Gitiles

 /* 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 sockaddr_in *s_in;
 } ftp_host_info_t;

 static char verbose_flag = 0;
 static char do_continue = 0;

 static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
 {
 	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] != ' ');

 	return xatou(buf);
 }

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

 	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;

 	server->s_in->sin_port = htons(port_num);
 	return xconnect_tcp_v4(server->s_in);
 }

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

 	/* Connect to the command socket */
 	control_stream = fdopen(xconnect_tcp_v4(server->s_in), "r+");
 	if (control_stream == NULL) {
 		bb_perror_msg_and_die("cannot open control stream");
 	}

 	if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
 		bb_error_msg_and_die("%s", buf + 4);
 	}

 	/*  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) {
 			bb_error_msg_and_die("PASS error: %s", buf + 4);
 		}
 		break;
 	default:
 		bb_error_msg_and_die("USER error: %s", buf + 4);
 	}

 	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];
 	off_t filesize = 0;
 	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) {
 		bb_error_msg_and_die("PASV error: %s", buf + 4);
 	}
 	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)
 			bb_error_msg_and_die("SIZE error: %s", buf + 4);
 	} else {
 		filesize = -1;
 		do_continue = 0;
 	}

 	if ((local_path[0] == '-') && (local_path[1] == '\0')) {
 		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 {
 			filesize -= beg_range;
 		}
 	}

 	if (ftpcmd("RETR ", server_path, control_stream, buf) > 150) {
 		bb_error_msg_and_die("RETR error: %s", buf + 4);
 	}

 	/* 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 (-1 == bb_copyfd_size(fd_data, fd_local, filesize))
 			exit(EXIT_FAILURE);
 	} else {
 		if (-1 == bb_copyfd_eof(fd_data, fd_local))
 			exit(EXIT_FAILURE);
 	}

 	/* close it all down */
 	close(fd_data);
 	if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
 		bb_error_msg_and_die("ftp error: %s", buf + 4);
 	}
 	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) {
 		bb_error_msg_and_die("PASV error: %s", buf + 4);
 	}
 	fd_data = xconnect_ftpdata(server, buf);

 	/* get the local file */
 	if ((local_path[0] == '-') && (local_path[1] == '\0')) {
 		fd_local = STDIN_FILENO;
 	} else {
 		fd_local = xopen(local_path, O_RDONLY);
 		fstat(fd_local, &sbuf);

 		sprintf(buf, "ALLO %lu", (unsigned long)sbuf.st_size);
 		response = ftpcmd(buf, NULL, control_stream, buf);
 		switch (response) {
 		case 200:
 		case 202:
 			break;
 		default:
 			close(fd_local);
 			bb_error_msg_and_die("ALLO error: %s", buf + 4);
 			break;
 		}
 	}
 	response = ftpcmd("STOR ", server_path, control_stream, buf);
 	switch (response) {
 	case 125:
 	case 150:
 		break;
 	default:
 		close(fd_local);
 		bb_error_msg_and_die("STOR error: %s", buf + 4);
 	}

 	/* 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) {
 		bb_error_msg_and_die("error: %s", buf + 4);
 	}
 	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}
 };
 #else
 #define ftpgetput_long_options 0
 #endif

 int ftpgetput_main(int argc, char **argv)
 {
 	/* content-length of the file */
 	unsigned opt;
 	char *port = "ftp";

 	/* socket to ftp server */
 	FILE *control_stream;
 	struct sockaddr_in s_in;

 	/* continue a prev transfer (-c) */
 	ftp_host_info_t *server;

 	int (*ftp_action)(ftp_host_info_t *, FILE *, const char *, char *) = NULL;

 	/* Check to see if the command is ftpget or ftput */
 	if (ENABLE_FTPPUT && (!ENABLE_FTPGET || applet_name[3] == 'p')) {
 		ftp_action = ftp_send;
 	}
 	if (ENABLE_FTPGET && (!ENABLE_FTPPUT || applet_name[3] == 'g')) {
 		ftp_action = ftp_receive;
 	}

 	/* Set default values */
 	server = xmalloc(sizeof(ftp_host_info_t));
 	server->user = "anonymous";
 	server->password = "busybox@";
 	verbose_flag = 0;

 	/*
 	 * Decipher the command line
 	 */
 	if (ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS)
 		applet_long_options = ftpgetput_long_options;

 	opt = getopt32(argc, argv, "cvu:p:P:", &server->user, &server->password, &port);

 	/* Process the non-option command line arguments */
 	if (argc - optind != 3) {
 		bb_show_usage();
 	}

 	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->s_in = &s_in;
 	bb_lookup_host(&s_in, argv[optind]);
 	s_in.sin_port = bb_lookup_port(port, "tcp", 21);
 	if (verbose_flag) {
 		printf("Connecting to %s[%s]:%d\n",
 				argv[optind], inet_ntoa(s_in.sin_addr), ntohs(s_in.sin_port));
 	}

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

 	return ftp_action(server, control_stream, argv[optind + 1], argv[optind + 2]);
 }
	/* 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 sockaddr_in *s_in;
	} ftp_host_info_t;

	static char verbose_flag = 0;
	static char do_continue = 0;

	static int ftpcmd(const char s1, const char s2, FILE stream, char buf)
	{
	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] != ' ');

	return xatou(buf);
	}

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

	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;

	server->s_in->sin_port = htons(port_num);
	return xconnect_tcp_v4(server->s_in);
	}

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

	/* Connect to the command socket */
	control_stream = fdopen(xconnect_tcp_v4(server->s_in), "r+");
	if (control_stream == NULL) {
	bb_perror_msg_and_die("cannot open control stream");
	}

	if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
	bb_error_msg_and_die("%s", buf + 4);
	}

	/* 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) {
	bb_error_msg_and_die("PASS error: %s", buf + 4);
	}
	break;
	default:
	bb_error_msg_and_die("USER error: %s", buf + 4);
	}

	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];
	off_t filesize = 0;
	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) {
	bb_error_msg_and_die("PASV error: %s", buf + 4);
	}
	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)
	bb_error_msg_and_die("SIZE error: %s", buf + 4);
	} else {
	filesize = -1;
	do_continue = 0;
	}

	if ((local_path[0] == '-') && (local_path[1] == '\0')) {
	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 {
	filesize -= beg_range;
	}
	}

	if (ftpcmd("RETR ", server_path, control_stream, buf) > 150) {
	bb_error_msg_and_die("RETR error: %s", buf + 4);
	}

	/* 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 (-1 == bb_copyfd_size(fd_data, fd_local, filesize))
	exit(EXIT_FAILURE);
	} else {
	if (-1 == bb_copyfd_eof(fd_data, fd_local))
	exit(EXIT_FAILURE);
	}

	/* close it all down */
	close(fd_data);
	if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
	bb_error_msg_and_die("ftp error: %s", buf + 4);
	}
	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) {
	bb_error_msg_and_die("PASV error: %s", buf + 4);
	}
	fd_data = xconnect_ftpdata(server, buf);

	/* get the local file */
	if ((local_path[0] == '-') && (local_path[1] == '\0')) {
	fd_local = STDIN_FILENO;
	} else {
	fd_local = xopen(local_path, O_RDONLY);
	fstat(fd_local, &sbuf);

	sprintf(buf, "ALLO %lu", (unsigned long)sbuf.st_size);
	response = ftpcmd(buf, NULL, control_stream, buf);
	switch (response) {
	case 200:
	case 202:
	break;
	default:
	close(fd_local);
	bb_error_msg_and_die("ALLO error: %s", buf + 4);
	break;
	}
	}
	response = ftpcmd("STOR ", server_path, control_stream, buf);
	switch (response) {
	case 125:
	case 150:
	break;
	default:
	close(fd_local);
	bb_error_msg_and_die("STOR error: %s", buf + 4);
	}

	/* 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) {
	bb_error_msg_and_die("error: %s", buf + 4);
	}
	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}
	};
	#else
	#define ftpgetput_long_options 0
	#endif

	int ftpgetput_main(int argc, char **argv)
	{
	/* content-length of the file */
	unsigned opt;
	char *port = "ftp";

	/* socket to ftp server */
	FILE *control_stream;
	struct sockaddr_in s_in;

	/* continue a prev transfer (-c) */
	ftp_host_info_t *server;

	int (ftp_action)(ftp_host_info_t , FILE , const char , char *) = NULL;

	/* Check to see if the command is ftpget or ftput */
	if (ENABLE_FTPPUT && (!ENABLE_FTPGET \|\| applet_name[3] == 'p')) {
	ftp_action = ftp_send;
	}
	if (ENABLE_FTPGET && (!ENABLE_FTPPUT \|\| applet_name[3] == 'g')) {
	ftp_action = ftp_receive;
	}

	/* Set default values */
	server = xmalloc(sizeof(ftp_host_info_t));
	server->user = "anonymous";
	server->password = "busybox@";
	verbose_flag = 0;

	/*
	* Decipher the command line
	*/
	if (ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS)
	applet_long_options = ftpgetput_long_options;

	opt = getopt32(argc, argv, "cvu:p:P:", &server->user, &server->password, &port);

	/* Process the non-option command line arguments */
	if (argc - optind != 3) {
	bb_show_usage();
	}

	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->s_in = &s_in;
	bb_lookup_host(&s_in, argv[optind]);
	s_in.sin_port = bb_lookup_port(port, "tcp", 21);
	if (verbose_flag) {
	printf("Connecting to %s[%s]:%d\n",
	argv[optind], inet_ntoa(s_in.sin_addr), ntohs(s_in.sin_port));
	}

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

	return ftp_action(server, control_stream, argv[optind + 1], argv[optind + 2]);
	}