* 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>
+ * Copyright (C) 2002 Glenn McGrath
*
* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
-#include <getopt.h>
+//usage:#define ftpget_trivial_usage
+//usage: "[OPTIONS] HOST [LOCAL_FILE] REMOTE_FILE"
+//usage:#define ftpget_full_usage "\n\n"
+//usage: "Download a file via FTP\n"
+//usage: IF_FEATURE_FTPGETPUT_LONG_OPTIONS(
+//usage: "\n -c,--continue Continue previous transfer"
+//usage: "\n -v,--verbose Verbose"
+//usage: "\n -u,--username USER Username"
+//usage: "\n -p,--password PASS Password"
+//usage: "\n -P,--port NUM Port"
+//usage: )
+//usage: IF_NOT_FEATURE_FTPGETPUT_LONG_OPTIONS(
+//usage: "\n -c Continue previous transfer"
+//usage: "\n -v Verbose"
+//usage: "\n -u USER Username"
+//usage: "\n -p PASS Password"
+//usage: "\n -P NUM Port"
+//usage: )
+//usage:
+//usage:#define ftpput_trivial_usage
+//usage: "[OPTIONS] HOST [REMOTE_FILE] LOCAL_FILE"
+//usage:#define ftpput_full_usage "\n\n"
+//usage: "Upload a file to a FTP server\n"
+//usage: IF_FEATURE_FTPGETPUT_LONG_OPTIONS(
+//usage: "\n -v,--verbose Verbose"
+//usage: "\n -u,--username USER Username"
+//usage: "\n -p,--password PASS Password"
+//usage: "\n -P,--port NUM Port"
+//usage: )
+//usage: IF_NOT_FEATURE_FTPGETPUT_LONG_OPTIONS(
+//usage: "\n -v Verbose"
+//usage: "\n -u USER Username"
+//usage: "\n -p PASS Password"
+//usage: "\n -P NUM Port number"
+//usage: )
+
#include "libbb.h"
-typedef struct ftp_host_info_s {
+struct globals {
const char *user;
const 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)
+ FILE *control_stream;
+ int verbose_flag;
+ int do_continue;
+ char buf[4]; /* actually [BUFSZ] */
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+enum { BUFSZ = COMMON_BUFSIZE - offsetof(struct globals, buf) };
+struct BUG_G_too_big {
+ char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
+};
+#define user (G.user )
+#define password (G.password )
+#define lsa (G.lsa )
+#define control_stream (G.control_stream)
+#define verbose_flag (G.verbose_flag )
+#define do_continue (G.do_continue )
+#define buf (G.buf )
+#define INIT_G() do { } while (0)
+
+
+static void ftp_die(const char *msg) NORETURN;
+static void ftp_die(const char *msg)
{
+ char *cp = buf; /* buf holds peer's response */
+
/* 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);
+ while (*cp >= ' ' && *cp < '\x7f')
+ cp++;
+ *cp = '\0';
+ bb_error_msg_and_die("unexpected server response%s%s: %s",
+ (msg ? " to " : ""), (msg ? msg : ""), buf);
}
-
-static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
+static int ftpcmd(const char *s1, const char *s2)
{
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);
- }
+ fprintf(control_stream, (s2 ? "%s %s\r\n" : "%s %s\r\n"+3),
+ s1, s2);
+ fflush(control_stream);
}
- 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';
+ do {
+ strcpy(buf, "EOF"); /* for ftp_die */
+ if (fgets(buf, BUFSZ - 2, control_stream) == NULL) {
+ ftp_die(NULL);
}
} while (!isdigit(buf[0]) || buf[3] != ' ');
return n;
}
-static int xconnect_ftpdata(ftp_host_info_t *server, char *buf)
+static void ftp_login(void)
+{
+ /* Connect to the command socket */
+ control_stream = fdopen(xconnect_stream(lsa), "r+");
+ if (control_stream == NULL) {
+ /* fdopen failed - extremely unlikely */
+ bb_perror_nomsg_and_die();
+ }
+
+ if (ftpcmd(NULL, NULL) != 220) {
+ ftp_die(NULL);
+ }
+
+ /* Login to the server */
+ switch (ftpcmd("USER", user)) {
+ case 230:
+ break;
+ case 331:
+ if (ftpcmd("PASS", password) != 230) {
+ ftp_die("PASS");
+ }
+ break;
+ default:
+ ftp_die("USER");
+ }
+
+ ftpcmd("TYPE I", NULL);
+}
+
+static int xconnect_ftpdata(void)
{
char *buf_ptr;
- unsigned short port_num;
+ unsigned port_num;
+
+/*
+TODO: PASV command will not work for IPv6. RFC2428 describes
+IPv6-capable "extended PASV" - EPSV.
+
+"EPSV [protocol]" asks server to bind to and listen on a data port
+in specified protocol. Protocol is 1 for IPv4, 2 for IPv6.
+If not specified, defaults to "same as used for control connection".
+If server understood you, it should answer "229 <some text>(|||port|)"
+where "|" are literal pipe chars and "port" is ASCII decimal port#.
+
+There is also an IPv6-capable replacement for PORT (EPRT),
+but we don't need that.
+
+NB: PASV may still work for some servers even over IPv6.
+For example, vsftp happily answers
+"227 Entering Passive Mode (0,0,0,0,n,n)" and proceeds as usual.
+
+TODO2: need to stop ignoring IP address in PASV response.
+*/
+
+ if (ftpcmd("PASV", NULL) != 227) {
+ ftp_die("PASV");
+ }
/* Response is "NNN garbageN1,N2,N3,N4,P1,P2[)garbage]
* Server's IP is N1.N2.N3.N4 (we ignore it)
*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);
+ set_nport(&lsa->u.sa, htons(port_num));
+ return xconnect_stream(lsa);
}
-static FILE *ftp_login(ftp_host_info_t *server)
+static int pump_data_and_QUIT(int from, int to)
{
- 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();
+ /* copy the file */
+ if (bb_copyfd_eof(from, to) == -1) {
+ /* error msg is already printed by bb_copyfd_eof */
+ return EXIT_FAILURE;
}
- if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
- ftp_die(NULL, buf);
- }
+ /* close data connection */
+ close(from); /* don't know which one is that, so we close both */
+ close(to);
- /* 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);
+ /* does server confirm that transfer is finished? */
+ if (ftpcmd(NULL, NULL) != 226) {
+ ftp_die(NULL);
}
+ ftpcmd("QUIT", NULL);
- ftpcmd("TYPE I", NULL, control_stream, buf);
-
- return control_stream;
+ return EXIT_SUCCESS;
}
#if !ENABLE_FTPGET
-int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
- const char *local_path, char *server_path);
+int ftp_receive(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)
+int ftp_receive(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);
+ /* connect to the data socket */
+ fd_data = xconnect_ftpdata();
- 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 {
+ if (ftpcmd("SIZE", server_path) != 213) {
do_continue = 0;
}
if (do_continue) {
struct stat sbuf;
- if (lstat(local_path, &sbuf) < 0) {
- bb_perror_msg_and_die("lstat");
+ /* lstat would be wrong here! */
+ if (stat(local_path, &sbuf) < 0) {
+ bb_perror_msg_and_die("stat");
}
if (sbuf.st_size > 0) {
beg_range = sbuf.st_size;
}
if (do_continue) {
- sprintf(buf, "REST %"OFF_FMT"d", beg_range);
- if (ftpcmd(buf, NULL, control_stream, buf) != 350) {
+ sprintf(buf, "REST %"OFF_FMT"u", beg_range);
+ if (ftpcmd(buf, NULL) != 350) {
do_continue = 0;
- } else {
- //if (filesize != -1)
- // filesize -= beg_range;
}
}
- if (ftpcmd("RETR", server_path, control_stream, buf) > 150) {
- ftp_die("RETR", buf);
+ if (ftpcmd("RETR", server_path) > 150) {
+ ftp_die("RETR");
}
- /* only make a local file if we know that one exists on the remote server */
+ /* create local file _after_ we know that remote file exists */
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);
+ fd_local = xopen(local_path,
+ do_continue ? (O_APPEND | O_WRONLY)
+ : (O_CREAT | O_TRUNC | O_WRONLY)
+ );
}
- ftpcmd("QUIT", NULL, control_stream, buf);
- return EXIT_SUCCESS;
+ return pump_data_and_QUIT(fd_data, fd_local);
}
#endif
#if !ENABLE_FTPPUT
-int ftp_send(ftp_host_info_t *server, FILE *control_stream,
- const char *server_path, char *local_path);
+int ftp_send(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)
+int ftp_send(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);
+ /* connect to the data socket */
+ fd_data = xconnect_ftpdata();
/* get the local file */
fd_local = STDIN_FILENO;
- if (NOT_LONE_DASH(local_path)) {
+ 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);
+
+ response = ftpcmd("STOR", server_path);
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);
+ ftp_die("STOR");
}
- /* 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;
+ return pump_data_and_QUIT(fd_local, fd_data);
}
#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 char ftpgetput_longopts[] =
+static const char ftpgetput_longopts[] ALIGN1 =
"continue\0" Required_argument "c"
"verbose\0" No_argument "v"
"username\0" Required_argument "u"
;
#endif
-int ftpgetput_main(int argc, char **argv);
-int ftpgetput_main(int argc, char **argv)
+int ftpgetput_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ftpgetput_main(int argc UNUSED_PARAM, 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;
+ int (*ftp_action)(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
+ INIT_G();
/* Set default values */
- server = xmalloc(sizeof(*server));
- server->user = "anonymous";
- server->password = "busybox@";
+ user = "anonymous";
+ password = "busybox@";
/*
* Decipher the command line
#if ENABLE_FEATURE_FTPGETPUT_LONG_OPTIONS
applet_long_options = ftpgetput_longopts;
#endif
- opt_complementary = "=3"; /* must have 3 params */
- opt = getopt32(argc, argv, "cvu:p:P:", &server->user, &server->password, &port);
+ opt_complementary = "-2:vv:cc"; /* must have 2 to 3 params; -v and -c count */
+ getopt32(argv, "cvu:p:P:", &user, &password, &port,
+ &verbose_flag, &do_continue);
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 = xhost2sockaddr(argv[0], bb_lookup_port(port, "tcp", 21));
+ lsa = xhost2sockaddr(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));
+ xmalloc_sockaddr2dotted(&lsa->u.sa));
}
- /* Connect/Setup/Configure the FTP session */
- control_stream = ftp_login(server);
-
- return ftp_action(server, control_stream, argv[1], argv[2]);
+ ftp_login();
+ return ftp_action(argv[1], argv[2] ? argv[2] : argv[1]);
}
projects / platform / upstream / busybox.git / blobdiff