aboutsummaryrefslogtreecommitdiff
path: root/networking/ftpd.c
diff options
context:
space:
mode:
Diffstat (limited to 'networking/ftpd.c')
-rw-r--r--networking/ftpd.c109
1 files changed, 65 insertions, 44 deletions
diff --git a/networking/ftpd.c b/networking/ftpd.c
index 675324803..3b98bacf4 100644
--- a/networking/ftpd.c
+++ b/networking/ftpd.c
@@ -62,15 +62,26 @@
/* Convert a constant to 3-digit string, packed into uint32_t */
enum {
/* Shift for Nth decimal digit */
- SHIFT2 = 0 * BB_LITTLE_ENDIAN + 24 * BB_BIG_ENDIAN,
- SHIFT1 = 8 * BB_LITTLE_ENDIAN + 16 * BB_BIG_ENDIAN,
- SHIFT0 = 16 * BB_LITTLE_ENDIAN + 8 * BB_BIG_ENDIAN,
+ SHIFT2 = 0 * BB_LITTLE_ENDIAN + 24 * BB_BIG_ENDIAN,
+ SHIFT1 = 8 * BB_LITTLE_ENDIAN + 16 * BB_BIG_ENDIAN,
+ SHIFT0 = 16 * BB_LITTLE_ENDIAN + 8 * BB_BIG_ENDIAN,
+ /* And for 4th position (space) */
+ SHIFTsp = 24 * BB_LITTLE_ENDIAN + 0 * BB_BIG_ENDIAN,
};
#define STRNUM32(s) (uint32_t)(0 \
| (('0' + ((s) / 1 % 10)) << SHIFT0) \
| (('0' + ((s) / 10 % 10)) << SHIFT1) \
| (('0' + ((s) / 100 % 10)) << SHIFT2) \
)
+#define STRNUM32sp(s) (uint32_t)(0 \
+ | (' ' << SHIFTsp) \
+ | (('0' + ((s) / 1 % 10)) << SHIFT0) \
+ | (('0' + ((s) / 10 % 10)) << SHIFT1) \
+ | (('0' + ((s) / 100 % 10)) << SHIFT2) \
+)
+
+#define MSG_OK "Operation successful\r\n"
+#define MSG_ERR "Error\r\n"
struct globals {
int pasv_listen_fd;
@@ -88,9 +99,15 @@ struct globals {
#if ENABLE_FEATURE_FTP_WRITE
char *rnfr_filename;
#endif
+ /* We need these aligned to uint32_t */
+ char msg_ok [(sizeof("NNN " MSG_OK ) + 3) & 0xfffc];
+ char msg_err[(sizeof("NNN " MSG_ERR) + 3) & 0xfffc];
};
#define G (*(struct globals*)&bb_common_bufsiz1)
-#define INIT_G() do { } while (0)
+#define INIT_G() do { \
+ strcpy(G.msg_ok + 4, MSG_OK ); \
+ strcpy(G.msg_err + 4, MSG_ERR); \
+} while (0)
static char *
@@ -161,17 +178,21 @@ cmdio_write(uint32_t status_str, const char *str)
}
static void
-cmdio_write_ok(int status)
+cmdio_write_ok(unsigned status)
{
- fdprintf(STDOUT_FILENO, "%u Operation successful\r\n", status);
+ *(uint32_t *) G.msg_ok = status;
+ xwrite(STDOUT_FILENO, G.msg_ok, sizeof("NNN " MSG_OK) - 1);
}
+#define WRITE_OK(a) cmdio_write_ok(STRNUM32sp(a))
/* TODO: output strerr(errno) if errno != 0? */
static void
-cmdio_write_error(int status)
+cmdio_write_error(unsigned status)
{
- fdprintf(STDOUT_FILENO, "%u Error\r\n", status);
+ *(uint32_t *) G.msg_err = status;
+ xwrite(STDOUT_FILENO, G.msg_err, sizeof("NNN " MSG_ERR) - 1);
}
+#define WRITE_ERR(a) cmdio_write_error(STRNUM32sp(a))
static void
cmdio_write_raw(const char *p_text)
@@ -228,10 +249,10 @@ static void
handle_cwd(void)
{
if (!G.ftp_arg || chdir(G.ftp_arg) != 0) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
- cmdio_write_ok(FTP_CWDOK);
+ WRITE_OK(FTP_CWDOK);
}
static void
@@ -318,7 +339,7 @@ ftpdataio_get_pasv_fd(void)
remote_fd = accept(G.pasv_listen_fd, NULL, 0);
if (remote_fd < 0) {
- cmdio_write_error(FTP_BADSENDCONN);
+ WRITE_ERR(FTP_BADSENDCONN);
return remote_fd;
}
@@ -459,7 +480,7 @@ handle_port(void)
#endif
) {
bail:
- cmdio_write_error(FTP_BADCMD);
+ WRITE_ERR(FTP_BADCMD);
return;
}
@@ -503,7 +524,7 @@ handle_port(void)
G.port_addr = get_peer_lsa(STDIN_FILENO);
set_nport(G.port_addr, port);
#endif
- cmdio_write_ok(FTP_PORTOK);
+ WRITE_OK(FTP_PORTOK);
}
static void
@@ -511,7 +532,7 @@ handle_rest(void)
{
/* When ftp_arg == NULL simply restart from beginning */
G.restart_pos = G.ftp_arg ? xatoi_u(G.ftp_arg) : 0;
- cmdio_write_ok(FTP_RESTOK);
+ WRITE_OK(FTP_RESTOK);
}
static void
@@ -532,13 +553,13 @@ handle_retr(void)
/* O_NONBLOCK is useful if file happens to be a device node */
local_file_fd = G.ftp_arg ? open(G.ftp_arg, O_RDONLY | O_NONBLOCK) : -1;
if (local_file_fd < 0) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
if (fstat(local_file_fd, &statbuf) != 0 || !S_ISREG(statbuf.st_mode)) {
/* Note - pretend open failed */
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
goto file_close_out;
}
G.local_file_fd = local_file_fd;
@@ -563,9 +584,9 @@ handle_retr(void)
bytes_transferred = bb_copyfd_eof(local_file_fd, remote_fd);
close(remote_fd);
if (bytes_transferred < 0)
- cmdio_write_error(FTP_BADSENDFILE);
+ WRITE_ERR(FTP_BADSENDFILE);
else
- cmdio_write_ok(FTP_TRANSFEROK);
+ WRITE_OK(FTP_TRANSFEROK);
file_close_out:
close(local_file_fd);
@@ -645,7 +666,7 @@ handle_dir_common(int opts)
cmdio_write(0, line); /* hack: 0 results in no status at all */
free(line);
}
- cmdio_write_ok(FTP_STATFILE_OK);
+ WRITE_OK(FTP_STATFILE_OK);
} else {
/* LIST/NLST [<filename>] */
int remote_fd = get_remote_transfer_fd(" Here comes the directory listing");
@@ -664,7 +685,7 @@ handle_dir_common(int opts)
}
}
close(remote_fd);
- cmdio_write_ok(FTP_TRANSFEROK);
+ WRITE_OK(FTP_TRANSFEROK);
}
fclose(ls_fp); /* closes ls_fd too */
}
@@ -694,7 +715,7 @@ handle_size(void)
|| stat(G.ftp_arg, &statbuf) != 0
|| !S_ISREG(statbuf.st_mode)
) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
sprintf(buf, STR(FTP_STATFILE_OK)" %"OFF_FMT"u\r\n", statbuf.st_size);
@@ -708,30 +729,30 @@ static void
handle_mkd(void)
{
if (!G.ftp_arg || mkdir(G.ftp_arg, 0777) != 0) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
- cmdio_write_ok(FTP_MKDIROK);
+ WRITE_OK(FTP_MKDIROK);
}
static void
handle_rmd(void)
{
if (!G.ftp_arg || rmdir(G.ftp_arg) != 0) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
- cmdio_write_ok(FTP_RMDIROK);
+ WRITE_OK(FTP_RMDIROK);
}
static void
handle_dele(void)
{
if (!G.ftp_arg || unlink(G.ftp_arg) != 0) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
- cmdio_write_ok(FTP_DELEOK);
+ WRITE_OK(FTP_DELEOK);
}
static void
@@ -739,7 +760,7 @@ handle_rnfr(void)
{
free(G.rnfr_filename);
G.rnfr_filename = xstrdup(G.ftp_arg);
- cmdio_write_ok(FTP_RNFROK);
+ WRITE_OK(FTP_RNFROK);
}
static void
@@ -758,10 +779,10 @@ handle_rnto(void)
G.rnfr_filename = NULL;
if (retval) {
- cmdio_write_error(FTP_FILEFAIL);
+ WRITE_ERR(FTP_FILEFAIL);
return;
}
- cmdio_write_ok(FTP_RENAMEOK);
+ WRITE_OK(FTP_RENAMEOK);
}
static void
@@ -798,7 +819,7 @@ handle_upload_common(int is_append, int is_unique)
|| fstat(local_file_fd, &statbuf) != 0
|| !S_ISREG(statbuf.st_mode)
) {
- cmdio_write_error(FTP_UPLOADFAIL);
+ WRITE_ERR(FTP_UPLOADFAIL);
if (local_file_fd >= 0)
goto close_local_and_bail;
return;
@@ -817,9 +838,9 @@ handle_upload_common(int is_append, int is_unique)
bytes_transferred = bb_copyfd_eof(remote_fd, local_file_fd);
close(remote_fd);
if (bytes_transferred < 0)
- cmdio_write_error(FTP_BADSENDFILE);
+ WRITE_ERR(FTP_BADSENDFILE);
else
- cmdio_write_ok(FTP_TRANSFEROK);
+ WRITE_OK(FTP_TRANSFEROK);
close_local_and_bail:
close(local_file_fd);
@@ -981,7 +1002,7 @@ int ftpd_main(int argc, char **argv)
setsockopt(STDIN_FILENO, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
setsockopt(STDIN_FILENO, SOL_SOCKET, SO_OOBINLINE, &const_int_1, sizeof(const_int_1));
- cmdio_write_ok(FTP_GREET);
+ WRITE_OK(FTP_GREET);
signal(SIGALRM, timeout_handler);
#ifdef IF_WE_WANT_TO_REQUIRE_LOGIN
@@ -1002,14 +1023,14 @@ int ftpd_main(int argc, char **argv)
break;
cmdio_write_raw(STR(FTP_NEEDUSER)" Login with USER\r\n");
} else if (cmdval == const_QUIT) {
- cmdio_write_ok(FTP_GOODBYE);
+ WRITE_OK(FTP_GOODBYE);
return 0;
} else {
cmdio_write_raw(STR(FTP_LOGINERR)" Login with USER and PASS\r\n");
}
}
}
- cmdio_write_ok(FTP_LOGINOK);
+ WRITE_OK(FTP_LOGINOK);
#endif
/* RFC-959 Section 5.1
@@ -1054,23 +1075,23 @@ int ftpd_main(int argc, char **argv)
uint32_t cmdval = cmdio_get_cmd_and_arg();
if (cmdval == const_QUIT) {
- cmdio_write_ok(FTP_GOODBYE);
+ WRITE_OK(FTP_GOODBYE);
return 0;
}
else if (cmdval == const_USER)
- cmdio_write_ok(FTP_GIVEPWORD);
+ WRITE_OK(FTP_GIVEPWORD);
else if (cmdval == const_PASS)
- cmdio_write_ok(FTP_LOGINOK);
+ WRITE_OK(FTP_LOGINOK);
else if (cmdval == const_NOOP)
- cmdio_write_ok(FTP_NOOPOK);
+ WRITE_OK(FTP_NOOPOK);
else if (cmdval == const_TYPE)
- cmdio_write_ok(FTP_TYPEOK);
+ WRITE_OK(FTP_TYPEOK);
else if (cmdval == const_STRU)
- cmdio_write_ok(FTP_STRUOK);
+ WRITE_OK(FTP_STRUOK);
else if (cmdval == const_MODE)
- cmdio_write_ok(FTP_MODEOK);
+ WRITE_OK(FTP_MODEOK);
else if (cmdval == const_ALLO)
- cmdio_write_ok(FTP_ALLOOK);
+ WRITE_OK(FTP_ALLOOK);
else if (cmdval == const_SYST)
cmdio_write_raw(STR(FTP_SYSTOK)" UNIX Type: L8\r\n");
else if (cmdval == const_PWD)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 21:02:47 +0000