mirror of
https://github.com/sheumann/hush.git
synced 2024-10-29 20:27:40 +00:00
ftpgetput: fix PASV mode, fix xatou0induced breakage,
improve error message, guard against garbage from remote server being printed. ~20 bytes code growth
This commit is contained in:
Denis Vlasenko
parent
6eebed561a
commit
562dc249e0
@ -25,15 +25,28 @@ typedef struct ftp_host_info_s {
|
||||
static char verbose_flag;
|
||||
static char 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);
|
||||
fprintf(stream, "%s %s\r\n", s1, s2);
|
||||
} else {
|
||||
fprintf(stream, "%s\r\n", s1);
|
||||
}
|
||||
@ -50,14 +63,23 @@ static int ftpcmd(const char *s1, const char *s2, FILE *stream, char *buf)
|
||||
}
|
||||
} while (!isdigit(buf[0]) || buf[3] != ' ');
|
||||
|
||||
return xatou(buf);
|
||||
buf[3] = '\0';
|
||||
n = xatou(buf);
|
||||
buf[3] = ' ';
|
||||
return n;
|
||||
}
|
||||
|
||||
static int xconnect_ftpdata(ftp_host_info_t *server, const char *buf)
|
||||
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);
|
||||
@ -78,24 +100,25 @@ static FILE *ftp_login(ftp_host_info_t *server)
|
||||
/* 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");
|
||||
/* Extremely unlikely */
|
||||
bb_perror_nomsg_and_die();
|
||||
}
|
||||
|
||||
if (ftpcmd(NULL, NULL, control_stream, buf) != 220) {
|
||||
bb_error_msg_and_die("%s", buf + 4);
|
||||
ftp_die(NULL, buf);
|
||||
}
|
||||
|
||||
/* Login to the server */
|
||||
switch (ftpcmd("USER ", server->user, control_stream, buf)) {
|
||||
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);
|
||||
if (ftpcmd("PASS", server->password, control_stream, buf) != 230) {
|
||||
ftp_die("PASS", buf);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
bb_error_msg_and_die("USER error: %s", buf + 4);
|
||||
ftp_die("USER", buf);
|
||||
}
|
||||
|
||||
ftpcmd("TYPE I", NULL, control_stream, buf);
|
||||
@ -121,14 +144,14 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
|
||||
|
||||
/* Connect to the data socket */
|
||||
if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
|
||||
bb_error_msg_and_die("PASV error: %s", buf + 4);
|
||||
ftp_die("PASV", buf);
|
||||
}
|
||||
fd_data = xconnect_ftpdata(server, buf);
|
||||
|
||||
if (ftpcmd("SIZE ", server_path, control_stream, buf) == 213) {
|
||||
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);
|
||||
// ftp_die("SIZE", buf);
|
||||
} else {
|
||||
do_continue = 0;
|
||||
}
|
||||
@ -160,8 +183,8 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
|
||||
}
|
||||
}
|
||||
|
||||
if (ftpcmd("RETR ", server_path, control_stream, buf) > 150) {
|
||||
bb_error_msg_and_die("RETR error: %s", buf + 4);
|
||||
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 */
|
||||
@ -185,7 +208,7 @@ int ftp_receive(ftp_host_info_t *server, FILE *control_stream,
|
||||
/* 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);
|
||||
ftp_die(NULL, buf);
|
||||
}
|
||||
ftpcmd("QUIT", NULL, control_stream, buf);
|
||||
|
||||
@ -209,7 +232,7 @@ int ftp_send(ftp_host_info_t *server, FILE *control_stream,
|
||||
|
||||
/* Connect to the data socket */
|
||||
if (ftpcmd("PASV", NULL, control_stream, buf) != 227) {
|
||||
bb_error_msg_and_die("PASV error: %s", buf + 4);
|
||||
ftp_die("PASV", buf);
|
||||
}
|
||||
fd_data = xconnect_ftpdata(server, buf);
|
||||
|
||||
@ -219,7 +242,7 @@ int ftp_send(ftp_host_info_t *server, FILE *control_stream,
|
||||
fd_local = xopen(local_path, O_RDONLY);
|
||||
fstat(fd_local, &sbuf);
|
||||
|
||||
sprintf(buf, "ALLO %lu", (unsigned long)sbuf.st_size);
|
||||
sprintf(buf, "ALLO %"OFF_FMT"u", sbuf.st_size);
|
||||
response = ftpcmd(buf, NULL, control_stream, buf);
|
||||
switch (response) {
|
||||
case 200:
|
||||
@ -227,18 +250,18 @@ int ftp_send(ftp_host_info_t *server, FILE *control_stream,
|
||||
break;
|
||||
default:
|
||||
close(fd_local);
|
||||
bb_error_msg_and_die("ALLO error: %s", buf + 4);
|
||||
ftp_die("ALLO", buf);
|
||||
break;
|
||||
}
|
||||
}
|
||||
response = ftpcmd("STOR ", server_path, control_stream, buf);
|
||||
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);
|
||||
ftp_die("STOR", buf);
|
||||
}
|
||||
|
||||
/* transfer the file */
|
||||
@ -249,7 +272,7 @@ int ftp_send(ftp_host_info_t *server, FILE *control_stream,
|
||||
/* close it all down */
|
||||
close(fd_data);
|
||||
if (ftpcmd(NULL, NULL, control_stream, buf) != 226) {
|
||||
bb_error_msg_and_die("error: %s", buf + 4);
|
||||
ftp_die("close", buf);
|
||||
}
|
||||
ftpcmd("QUIT", NULL, control_stream, buf);
|
||||
|
||||
@ -278,21 +301,24 @@ int ftpgetput_main(int argc, char **argv)
|
||||
{
|
||||
/* content-length of the file */
|
||||
unsigned opt;
|
||||
char *port = "ftp";
|
||||
const char *port = "ftp";
|
||||
/* socket to ftp server */
|
||||
FILE *control_stream;
|
||||
struct sockaddr_in s_in;
|
||||
/* continue a prev transfer (-c) */
|
||||
/* continue previous transfer (-c) */
|
||||
ftp_host_info_t *server;
|
||||
int (*ftp_action)(ftp_host_info_t *, FILE *, const char *, char *) = NULL;
|
||||
|
||||
#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 (ENABLE_FTPPUT && (!ENABLE_FTPGET || applet_name[3] == 'p')) {
|
||||
ftp_action = ftp_send;
|
||||
}
|
||||
if (ENABLE_FTPGET && (!ENABLE_FTPPUT || applet_name[3] == 'g')) {
|
||||
if (applet_name[3] == 'g') {
|
||||
ftp_action = ftp_receive;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Set default values */
|
||||
server = xmalloc(sizeof(ftp_host_info_t));
|
||||
@ -306,13 +332,11 @@ int ftpgetput_main(int argc, char **argv)
|
||||
#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 (argc - optind != 3) {
|
||||
bb_show_usage();
|
||||
}
|
||||
|
||||
if (opt & FTPGETPUT_OPT_CONTINUE) {
|
||||
do_continue = 1;
|
||||
}
|
||||
@ -324,15 +348,15 @@ int ftpgetput_main(int argc, char **argv)
|
||||
* 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]);
|
||||
bb_lookup_host(&s_in, argv[0]);
|
||||
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));
|
||||
argv[0], 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]);
|
||||
return ftp_action(server, control_stream, argv[1], argv[2]);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user