1 files changed, 340 insertions, 0 deletions
diff --git a/networking/ftpgetput.c b/networking/ftpgetput.c
new file mode 100644
index 0000000..223d243
--- /dev/null
+++ b/networking/ftpgetput.c
@@ -0,0 +1,340 @@
+/* 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 }
+};
+#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;
+#endif
+	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]);
+}