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Add MLSD and MLST commands

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This commit is contained in:
Michael Theall 2017-11-02 00:47:18 -05:00
parent 30c1b7a77d
commit 7b1176d374
2 changed files with 568 additions and 156 deletions
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2
README.md
View File

@ -46,6 +46,8 @@ Supported Commands
- LIST
- MDTM
- MKD
- MLSD
- MLST
- MODE (no-op)
- NLST
- NOOP

722
source/ftp.c
View File

@ -1,5 +1,6 @@
/* This is FTP server implementation is based on RFC 959
* (https://tools.ietf.org/html/rfc959) and suggested implementation details
/* This FTP server implementation is based on RFC 959,
* (https://tools.ietf.org/html/rfc959), RFC 3659
* (https://tools.ietf.org/html/rfc3659) and suggested implementation details
* from https://cr.yp.to/ftp/filesystem.html
*/
#include "ftp.h"
@ -60,6 +61,8 @@ FTP_DECLARE(HELP);
FTP_DECLARE(LIST);
FTP_DECLARE(MDTM);
FTP_DECLARE(MKD);
FTP_DECLARE(MLSD);
FTP_DECLARE(MLST);
FTP_DECLARE(MODE);
FTP_DECLARE(NLST);
FTP_DECLARE(NOOP);
@ -107,25 +110,45 @@ typedef enum
SESSION_RECV = BIT(3), /*!< data transfer in source mode */
SESSION_SEND = BIT(4), /*!< data transfer in sink mode */
SESSION_RENAME = BIT(5), /*!< last command was RNFR and buffer contains path */
SESSION_NLST = BIT(6), /*!< list command is NLST */
SESSION_URGENT = BIT(7), /*!< in telnet urgent mode */
SESSION_URGENT = BIT(6), /*!< in telnet urgent mode */
} session_flags_t;
/*! ftp_xfer_dir mode */
typedef enum
{
XFER_DIR_LIST, /*!< Long list */
XFER_DIR_MLSD, /*!< Machine list directory */
XFER_DIR_MLST, /*!< Machine list */
XFER_DIR_NLST, /*!< Short list */
XFER_DIR_STAT, /*!< Stat command */
} xfer_dir_mode_t;
typedef enum
{
SESSION_MLST_TYPE = BIT(0),
SESSION_MLST_SIZE = BIT(1),
SESSION_MLST_MODIFY = BIT(2),
SESSION_MLST_PERM = BIT(3),
SESSION_MLST_UNIX_MODE = BIT(4),
} session_mlst_flags_t;
/*! ftp session */
struct ftp_session_t
{
char cwd[4096]; /*!< current working directory */
char lwd[4096]; /*!< list working directory */
struct sockaddr_in peer_addr; /*!< peer address for data connection */
struct sockaddr_in pasv_addr; /*!< listen address for PASV connection */
int cmd_fd; /*!< socket for command connection */
int pasv_fd; /*!< listen socket for PASV */
int data_fd; /*!< socket for data transfer */
time_t timestamp; /*!< time from last command */
session_flags_t flags; /*!< session flags */
session_state_t state; /*!< session state */
ftp_session_t *next; /*!< link to next session */
ftp_session_t *prev; /*!< link to prev session */
char cwd[4096]; /*!< current working directory */
char lwd[4096]; /*!< list working directory */
struct sockaddr_in peer_addr; /*!< peer address for data connection */
struct sockaddr_in pasv_addr; /*!< listen address for PASV connection */
int cmd_fd; /*!< socket for command connection */
int pasv_fd; /*!< listen socket for PASV */
int data_fd; /*!< socket for data transfer */
time_t timestamp; /*!< time from last command */
session_flags_t flags; /*!< session flags */
xfer_dir_mode_t dir_mode; /*!< dir transfer mode */
session_mlst_flags_t mlst_flags; /*!< session MLST flags */
session_state_t state; /*!< session state */
ftp_session_t *next; /*!< link to next session */
ftp_session_t *prev; /*!< link to prev session */
loop_status_t (*transfer)(ftp_session_t*); /*! data transfer callback */
char buffer[XFER_BUFFERSIZE]; /*! persistent data between callbacks */
@ -165,6 +188,8 @@ static ftp_command_t ftp_commands[] =
FTP_COMMAND(LIST),
FTP_COMMAND(MDTM),
FTP_COMMAND(MKD),
FTP_COMMAND(MLSD),
FTP_COMMAND(MLST),
FTP_COMMAND(MODE),
FTP_COMMAND(NLST),
FTP_COMMAND(NOOP),
@ -673,6 +698,217 @@ ftp_session_set_state(ftp_session_t *session,
}
}
/*! fill directory entry
*
* @param[in] session ftp session
* @param[in] st stat data
* @param[in] path path to fill
* @param[in] len path length
* @param[in] type type fact
*
* @returns errno
*/
static int
ftp_session_fill_dirent_type(ftp_session_t *session, const struct stat *st,
const char *path, size_t len, const char *type)
{
session->buffersize = 0;
if(session->dir_mode == XFER_DIR_MLSD
|| session->dir_mode == XFER_DIR_MLST)
{
if(session->dir_mode == XFER_DIR_MLST)
session->buffer[session->buffersize++] = ' ';
if(session->mlst_flags & SESSION_MLST_TYPE)
{
/* type fact */
if(!type)
{
type = "???";
if(S_ISREG(st->st_mode))
type = "file";
else if(S_ISDIR(st->st_mode))
type = "dir";
#ifndef _3DS
else if(S_ISLNK(st->st_mode))
type = "os.unix=symlink";
else if(S_ISCHR(st->st_mode))
type = "os.unix=character";
else if(S_ISBLK(st->st_mode))
type = "os.unix=block";
else if(S_ISFIFO(st->st_mode))
type = "os.unix=fifo";
else if(S_ISSOCK(st->st_mode))
type = "os.unix=socket";
#endif
}
session->buffersize +=
sprintf(session->buffer + session->buffersize, "Type=%s;", type);
}
if(session->mlst_flags & SESSION_MLST_SIZE)
{
/* size fact */
session->buffersize +=
sprintf(session->buffer + session->buffersize, "Size=%lld;",
(signed long long)st->st_size);
}
if(session->mlst_flags & SESSION_MLST_MODIFY)
{
/* mtime fact */
session->buffersize +=
sprintf(session->buffer + session->buffersize, "Modify=%ld;", st->st_mtime);
}
if(session->mlst_flags & SESSION_MLST_PERM)
{
/* permission fact */
strcpy(session->buffer + session->buffersize, "Perm=");
session->buffersize += strlen("Perm=");
/* append permission */
if(S_ISREG(st->st_mode) && (st->st_mode & S_IWUSR))
session->buffer[session->buffersize++] = 'a';
/* create permission */
if(S_ISDIR(st->st_mode) && (st->st_mode & S_IWUSR))
session->buffer[session->buffersize++] = 'c';
/* delete permission */
session->buffer[session->buffersize++] = 'd';
/* chdir permission */
if(S_ISDIR(st->st_mode) && (st->st_mode & S_IXUSR))
session->buffer[session->buffersize++] = 'e';
/* rename permission */
session->buffer[session->buffersize++] = 'f';
/* list permission */
if(S_ISDIR(st->st_mode) && (st->st_mode & S_IRUSR))
session->buffer[session->buffersize++] = 'l';
/* mkdir permission */
if(S_ISDIR(st->st_mode) && (st->st_mode & S_IWUSR))
session->buffer[session->buffersize++] = 'm';
/* delete permission */
if(S_ISDIR(st->st_mode) && (st->st_mode & S_IWUSR))
session->buffer[session->buffersize++] = 'p';
/* read permission */
if(S_ISREG(st->st_mode) && (st->st_mode & S_IRUSR))
session->buffer[session->buffersize++] = 'r';
/* write permission */
if(S_ISREG(st->st_mode) && (st->st_mode & S_IWUSR))
session->buffer[session->buffersize++] = 'w';
session->buffer[session->buffersize++] = ';';
}
if(session->mlst_flags & SESSION_MLST_UNIX_MODE)
{
/* unix mode fact */
mode_t mask = S_IRWXU | S_IRWXG | S_IRWXO | S_ISVTX | S_ISGID | S_ISUID;
session->buffersize =
sprintf(session->buffer, "UNIX.mode=0%lo;",
(unsigned long)(st->st_mode & mask));
}
/* make sure space precedes name */
if(session->buffer[session->buffersize-1] != ' ')
session->buffer[session->buffersize++] = ' ';
}
else if(session->dir_mode != XFER_DIR_NLST)
{
if(session->dir_mode == XFER_DIR_STAT)
session->buffer[session->buffersize++] = ' ';
/* perms nlinks owner group size */
session->buffersize +=
sprintf(session->buffer + session->buffersize,
"%c%c%c%c%c%c%c%c%c%c %lu 3DS 3DS %lld ",
S_ISREG(st->st_mode) ? '-' :
S_ISDIR(st->st_mode) ? 'd' :
#ifndef _3DS
S_ISLNK(st->st_mode) ? 'l' :
S_ISCHR(st->st_mode) ? 'c' :
S_ISBLK(st->st_mode) ? 'b' :
S_ISFIFO(st->st_mode) ? 'p' :
S_ISSOCK(st->st_mode) ? 's' :
#endif
'?',
st->st_mode & S_IRUSR ? 'r' : '-',
st->st_mode & S_IWUSR ? 'w' : '-',
st->st_mode & S_IXUSR ? 'x' : '-',
st->st_mode & S_IRGRP ? 'r' : '-',
st->st_mode & S_IWGRP ? 'w' : '-',
st->st_mode & S_IXGRP ? 'x' : '-',
st->st_mode & S_IROTH ? 'r' : '-',
st->st_mode & S_IWOTH ? 'w' : '-',
st->st_mode & S_IXOTH ? 'x' : '-',
(unsigned long)st->st_nlink,
(signed long long)st->st_size);
/* timestamp */
struct tm *tm = gmtime(&st->st_mtime);
if(tm)
{
const char *fmt = "%b %e %Y ";
if(session->timestamp > st->st_mtime
&& session->timestamp - st->st_mtime < (60*60*24*365/2))
{
fmt = "%b %e %H:%M ";
}
session->buffersize +=
strftime(session->buffer + session->buffersize,
sizeof(session->buffer) - session->buffersize,
fmt, tm);
}
else
{
session->buffersize +=
sprintf(session->buffer + session->buffersize, "Jan 1 1970 ");
}
}
if(session->buffersize + len + 2 > sizeof(session->buffer))
{
/* buffer will overflow */
return EOVERFLOW;
}
/* copy path */
memcpy(session->buffer+session->buffersize, path, len);
len = session->buffersize + len;
session->buffer[len++] = '\r';
session->buffer[len++] = '\n';
session->buffersize = len;
return 0;
}
/*! fill directory entry
*
* @param[in] session ftp session
* @param[in] st stat data
* @param[in] path path to fill
* @param[in] len path length
*
* @returns errno
*/
static int
ftp_session_fill_dirent(ftp_session_t *session, const struct stat *st,
const char *path, size_t len)
{
return ftp_session_fill_dirent_type(session, st, path, len, NULL);
}
/*! transfer loop
*
* Try to transfer as much data as the sockets will allow without blocking
@ -779,6 +1015,45 @@ decode_path(ftp_session_t *session,
}
}
/*! fill cdir directory entry
*
* @param[in] session ftp session
* @param[in] path path to fill
*
* @returns errno
*/
static int
ftp_session_fill_dirent_cdir(ftp_session_t *session, const char *path)
{
int rc;
struct stat st;
char *buffer;
size_t len;
rc = stat(path, &st);
/* double-check this was a directory */
if(rc == 0 && !S_ISDIR(st.st_mode))
{
/* shouldn't happen but just in case */
rc = -1;
errno = ENOTDIR;
}
if(rc != 0)
return errno;
/* encode \n in path */
len = strlen(path);
buffer = encode_path(path, &len, false);
if(!buffer)
return ENOMEM;
/* fill dirent with listed directory as type=cdir */
rc = ftp_session_fill_dirent_type(session, &st, buffer, len, "cdir");
free(buffer);
return rc;
}
/*! send a response on the command socket
*
* @param[in] session ftp session
@ -926,10 +1201,14 @@ ftp_session_new(int listen_fd)
/* initialize session */
strcpy(session->cwd, "/");
session->peer_addr.sin_addr.s_addr = INADDR_ANY;
session->cmd_fd = new_fd;
session->pasv_fd = -1;
session->data_fd = -1;
session->state = COMMAND_STATE;
session->cmd_fd = new_fd;
session->pasv_fd = -1;
session->data_fd = -1;
session->mlst_flags = SESSION_MLST_TYPE
| SESSION_MLST_SIZE
| SESSION_MLST_MODIFY
| SESSION_MLST_PERM;
session->state = COMMAND_STATE;
/* link to the sessions list */
if(sessions == NULL)
@ -1869,6 +2148,7 @@ build_path(ftp_session_t *session,
int rc;
char *p;
session->buffersize = 0;
memset(session->buffer, 0, sizeof(session->buffer));
/* make sure the input is a valid path */
@ -1881,12 +2161,15 @@ build_path(ftp_session_t *session,
if(args[0] == '/')
{
/* this is an absolute path */
if(strlen(args) > sizeof(session->buffer)-1)
size_t len = strlen(args);
if(len > sizeof(session->buffer)-1)
{
errno = ENAMETOOLONG;
return -1;
}
strncpy(session->buffer, args, sizeof(session->buffer));
memcpy(session->buffer, args, len);
session->buffersize = len;
}
else
{
@ -1903,16 +2186,21 @@ build_path(ftp_session_t *session,
errno = ENAMETOOLONG;
return -1;
}
session->buffersize = rc;
}
/* remove trailing / */
p = session->buffer + strlen(session->buffer);
p = session->buffer + session->buffersize;
while(p > session->buffer && *--p == '/')
{
*p = 0;
--session->buffersize;
}
/* if we ended with an empty path, it is the root directory */
if(strlen(session->buffer) == 0)
strcpy(session->buffer, "/");
if(session->buffersize == 0)
session->buffer[session->buffersize++] = '/';
return 0;
}
@ -1928,9 +2216,6 @@ list_transfer(ftp_session_t *session)
{
ssize_t rc;
size_t len;
uint64_t mtime;
time_t t_mtime;
struct tm *tm;
char *buffer;
struct stat st;
struct dirent *dent;
@ -1938,8 +2223,8 @@ list_transfer(ftp_session_t *session)
/* check if we sent all available data */
if(session->bufferpos == session->buffersize)
{
/* check if this was a STAT */
if(session->data_fd == session->cmd_fd)
/* check xfer dir type */
if(session->dir_mode == XFER_DIR_STAT)
rc = 213;
else
rc = 226;
@ -1968,14 +2253,14 @@ list_transfer(ftp_session_t *session)
return LOOP_CONTINUE;
/* check if this was a NLST */
if(session->flags & SESSION_NLST)
if(session->dir_mode == XFER_DIR_NLST)
{
/* NLST gives the whole path name */
session->buffersize = 0;
if(build_path(session, session->lwd, dent->d_name) == 0)
{
/* encode \n in path */
len = strlen(session->buffer);
len = session->buffersize;
buffer = encode_path(session->buffer, &len, false);
if(buffer != NULL)
{
@ -2007,14 +2292,28 @@ list_transfer(ftp_session_t *session)
if(!(entry->attributes & FS_ATTRIBUTE_READ_ONLY))
st.st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
st.st_size = entry->fileSize;
st.st_size = entry->fileSize;
st.st_mtime = 0;
bool getmtime = true;
if(session->dir_mode == XFER_DIR_MLSD
|| session->dir_mode == XFER_DIR_MLST)
{
if(!(session->mlst_flags & SESSION_MLST_MODIFY))
getmtime = false;
}
else if(session->dir_mode == XFER_DIR_NLST)
getmtime = false;
if((rc = build_path(session, session->lwd, dent->d_name)) != 0)
console_print(RED "build_path: %d %s\n" RESET, errno, strerror(errno));
else if((rc = sdmc_getmtime(session->buffer, &mtime)) != 0)
else if(getmtime)
{
console_print(RED "sdmc_getmtime '%s': 0x%x\n" RESET, session->buffer, rc);
mtime = 0;
uint64_t mtime = 0;
if((rc = sdmc_getmtime(session->buffer, &mtime)) != 0)
console_print(RED "sdmc_getmtime '%s': 0x%x\n" RESET, session->buffer, rc);
else
st.st_mtime = mtime;
}
}
else
@ -2032,8 +2331,6 @@ list_transfer(ftp_session_t *session)
ftp_send_response(session, 550, "unavailable\r\n");
return LOOP_EXIT;
}
mtime = st.st_mtime;
}
#else
/* lstat the entry */
@ -2049,68 +2346,20 @@ list_transfer(ftp_session_t *session)
ftp_send_response(session, 550, "unavailable\r\n");
return LOOP_EXIT;
}
mtime = st.st_mtime;
#endif
/* encode \n in path */
len = strlen(dent->d_name);
buffer = encode_path(dent->d_name, &len, false);
if(buffer != NULL)
{
/* copy to the session buffer to send */
session->buffersize =
sprintf(session->buffer,
"%c%c%c%c%c%c%c%c%c%c 1 3DS 3DS %lld ",
S_ISREG(st.st_mode) ? '-' :
S_ISDIR(st.st_mode) ? 'd' :
S_ISLNK(st.st_mode) ? 'l' :
S_ISCHR(st.st_mode) ? 'c' :
S_ISBLK(st.st_mode) ? 'b' :
S_ISFIFO(st.st_mode) ? 'p' :
S_ISSOCK(st.st_mode) ? 's' : '?',
st.st_mode & S_IRUSR ? 'r' : '-',
st.st_mode & S_IWUSR ? 'w' : '-',
st.st_mode & S_IXUSR ? 'x' : '-',
st.st_mode & S_IRGRP ? 'r' : '-',
st.st_mode & S_IWGRP ? 'w' : '-',
st.st_mode & S_IXGRP ? 'x' : '-',
st.st_mode & S_IROTH ? 'r' : '-',
st.st_mode & S_IWOTH ? 'w' : '-',
st.st_mode & S_IXOTH ? 'x' : '-',
(signed long long)st.st_size);
t_mtime = mtime;
tm = gmtime(&t_mtime);
if(tm != NULL)
rc = ftp_session_fill_dirent(session, &st, buffer, len);
free(buffer);
if(rc != 0)
{
const char *fmt = "%b %e %Y ";
if(session->timestamp > mtime && session->timestamp - mtime < (60*60*24*365/2))
fmt = "%b %e %H:%M ";
session->buffersize +=
strftime(session->buffer + session->buffersize,
sizeof(session->buffer) - session->buffersize,
fmt, tm);
}
else
{
session->buffersize +=
sprintf(session->buffer + session->buffersize, "Jan 1 1970 ");
}
if(session->buffersize + len + 2 > sizeof(session->buffer))
{
/* buffer will overflow */
free(buffer);
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 425, "%s\r\n", strerror(EOVERFLOW));
ftp_send_response(session, 425, "%s\r\n", strerror(rc));
return LOOP_EXIT;
}
memcpy(session->buffer+session->buffersize, buffer, len);
free(buffer);
len = session->buffersize + len;
session->buffer[len++] = '\r';
session->buffer[len++] = '\n';
session->buffersize = len;
}
else
session->buffersize = 0;
@ -2338,14 +2587,6 @@ ftp_xfer_file(ftp_session_t *session,
ftp_send_response(session, 503, "Bad sequence of commands\r\n");
}
/*! ftp_xfer_dir mode */
typedef enum
{
XFER_DIR_LIST, /*!< Long list */
XFER_DIR_NLST, /*!< Short list */
XFER_DIR_STAT, /*!< Stat command */
} xfer_dir_mode_t;
/*! Transfer a directory
*
* @param[in] session ftp session
@ -2362,11 +2603,11 @@ ftp_xfer_dir(ftp_session_t *session,
ssize_t rc;
size_t len;
struct stat st;
const char *base;
char *buffer;
/* set up the transfer */
session->flags &= ~(SESSION_RECV|SESSION_NLST);
session->dir_mode = mode;
session->flags &= ~SESSION_RECV;
session->flags |= SESSION_SEND;
session->transfer = list_transfer;
@ -2395,10 +2636,11 @@ ftp_xfer_dir(ftp_session_t *session,
/* error getting stat */
rc = errno;
/* work around broken clients that think LIST -a is a thing */
/* work around broken clients that think LIST -a is valid */
if(workaround && mode == XFER_DIR_LIST)
{
if(args[0] == '-' && (args[1] == 'a' || args[1] == 'l')) {
if(args[0] == '-' && (args[1] == 'a' || args[1] == 'l'))
{
if(args[2] == 0)
buffer = strdup(args+2);
else
@ -2419,43 +2661,62 @@ ftp_xfer_dir(ftp_session_t *session,
ftp_send_response(session, 550, "%s\r\n", strerror(rc));
return;
}
/* get the base name */
base = strrchr(session->buffer, '/') + 1;
/* encode \n in path */
len = strlen(base);
buffer = encode_path(base, &len, false);
if(buffer != NULL)
else if(mode == XFER_DIR_MLSD)
{
/* copy to the session buffer to send */
session->buffersize =
sprintf(session->buffer,
"-rwxrwxrwx 1 3DS 3DS %lld Jan 1 1970 ",
(signed long long)st.st_size);
if(session->buffersize + len + 2 > sizeof(session->buffer))
{
/* buffer will overflow */
free(buffer);
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 425, "%s\r\n", strerror(EOVERFLOW));
return;
}
memcpy(session->buffer + session->buffersize, buffer, len);
free(buffer);
len = session->buffersize + len;
session->buffer[len++] = '\r';
session->buffer[len++] = '\n';
session->buffersize = len;
/* specified file instead of directory for MLSD */
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 501, "%s\r\n", strerror(EINVAL));
return;
}
else if(mode == XFER_DIR_NLST)
{
/* NLST uses full path name */
len = session->buffersize;
buffer = encode_path(session->buffer, &len, false);
}
else
session->buffersize = 0;
{
/* everything else uses base name */
const char *base = strrchr(session->buffer, '/') + 1;
len = strlen(base);
buffer = encode_path(base, &len, false);
}
if(buffer)
{
rc = ftp_session_fill_dirent(session, &st, buffer, len);
free(buffer);
}
else
rc = ENOMEM;
if(rc != 0)
{
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 550, "%s\r\n", strerror(rc));
return;
}
}
else
{
/* it was a directory, so set it as the lwd */
strcpy(session->lwd, session->buffer);
memcpy(session->lwd, session->buffer, session->buffersize);
session->lwd[session->buffersize] = 0;
session->buffersize = 0;
if(session->dir_mode == XFER_DIR_MLSD
&& (session->mlst_flags & SESSION_MLST_TYPE))
{
/* send this directory as type=cdir */
rc = ftp_session_fill_dirent_cdir(session, session->lwd);
if(rc != 0)
{
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 550, "%s\r\n", strerror(rc));
return;
}
}
}
}
else if(ftp_session_open_cwd(session) != 0)
@ -2467,11 +2728,34 @@ ftp_xfer_dir(ftp_session_t *session,
}
else
{
/* set the lwd as the cwd */
/* set the cwd as the lwd */
strcpy(session->lwd, session->cwd);
session->buffersize = 0;
if(session->dir_mode == XFER_DIR_MLSD
&& (session->mlst_flags & SESSION_MLST_TYPE))
{
/* send this directory as type=cdir */
rc = ftp_session_fill_dirent_cdir(session, session->lwd);
if(rc != 0)
{
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 550, "%s\r\n", strerror(rc));
return;
}
}
}
if(session->flags & (SESSION_PORT|SESSION_PASV))
if(mode == XFER_DIR_MLST || mode == XFER_DIR_STAT)
{
/* this is a little different; we have to send the data over the command socket */
ftp_session_set_state(session, DATA_TRANSFER_STATE, CLOSE_PASV | CLOSE_DATA);
session->data_fd = session->cmd_fd;
session->flags |= SESSION_SEND;
ftp_send_response(session, -213, "Status\r\n");
return;
}
else if(session->flags & (SESSION_PORT|SESSION_PASV))
{
ftp_session_set_state(session, DATA_CONNECT_STATE, CLOSE_DATA);
@ -2489,17 +2773,8 @@ ftp_xfer_dir(ftp_session_t *session,
return;
}
else if(mode == XFER_DIR_STAT)
{
/* this is a little different; we have to send the data over the command socket */
ftp_session_set_state(session, DATA_TRANSFER_STATE, CLOSE_PASV | CLOSE_DATA);
session->data_fd = session->cmd_fd;
session->flags |= SESSION_SEND;
ftp_send_response(session, -213, "Status\r\n");
return;
}
/* we must have got LIST or NLST without a preceding PORT or PASV */
/* we must have got LIST/MLSD/MLST/NLST without a preceding PORT or PASV */
ftp_session_set_state(session, COMMAND_STATE, CLOSE_PASV | CLOSE_DATA);
ftp_send_response(session, 503, "Bad sequence of commands\r\n");
}
@ -2567,7 +2842,7 @@ FTP_DECLARE(APPE)
console_print(CYAN "%s %s\n" RESET, __func__, args ? args : "");
/* open the file in append mode */
return ftp_xfer_file(session, args, XFER_FILE_APPE);
ftp_xfer_file(session, args, XFER_FILE_APPE);
}
/*! @fn static void CDUP(ftp_session_t *session, const char *args)
@ -2693,12 +2968,19 @@ FTP_DECLARE(FEAT)
/* list our features */
ftp_send_response(session, -211, "\r\n"
" MDTM\r\n"
" PASV\r\n"
" SIZE\r\n"
" UTF8\r\n"
"\r\n"
"211 End\r\n");
" MDTM\r\n"
" MLST Type%s;Size%s;Modify%s;Perm%s;UNIX.mode%s;\r\n"
" PASV\r\n"
" SIZE\r\n"
" TVFS\r\n"
" UTF8\r\n"
"\r\n"
"211 End\r\n",
session->mlst_flags & SESSION_MLST_TYPE ? "*" : "",
session->mlst_flags & SESSION_MLST_SIZE ? "*" : "",
session->mlst_flags & SESSION_MLST_MODIFY ? "*" : "",
session->mlst_flags & SESSION_MLST_PERM ? "*" : "",
session->mlst_flags & SESSION_MLST_UNIX_MODE ? "*" : "");
}
/*! @fn static void HELP(ftp_session_t *session, const char *args)
@ -2717,9 +2999,9 @@ FTP_DECLARE(HELP)
/* list our accepted commands */
ftp_send_response(session, -214,
"The following commands are recognized\r\n"
" ABOR ALLO APPE CDUP CWD DELE FEAT HELP LIST MDTM MKD MODE NLST NOOP\r\n"
" OPTS PASS PASV PORT PWD QUIT REST RETR RMD RNFR RNTO STAT STOR STOU\r\n"
" STRU SYST TYPE USER XCUP XCWD XMKD XPWD XRMD\r\n"
" ABOR ALLO APPE CDUP CWD DELE FEAT HELP LIST MDTM MKD MLSD MLST MODE\r\n"
" NLST NOOP OPTS PASS PASV PORT PWD QUIT REST RETR RMD RNFR RNTO STAT\r\n"
" STOR STOU STRU SYST TYPE USER XCUP XCWD XMKD XPWD XRMD\r\n"
"214 End\r\n");
}
@ -2737,7 +3019,7 @@ FTP_DECLARE(LIST)
console_print(CYAN "%s %s\n" RESET, __func__, args ? args : "");
/* open the path in LIST mode */
return ftp_xfer_dir(session, args, XFER_DIR_LIST, true);
ftp_xfer_dir(session, args, XFER_DIR_LIST, true);
}
/*! @fn static void MDTM(ftp_session_t *session, const char *args)
@ -2841,6 +3123,84 @@ FTP_DECLARE(MKD)
ftp_send_response(session, 250, "OK\r\n");
}
/*! @fn static void MLSD(ftp_session_t *session, const char *args)
*
* @brief set transfer mode
*
* @param[in] session ftp session
* @param[in] args arguments
*/
FTP_DECLARE(MLSD)
{
console_print(CYAN "%s %s\n" RESET, __func__, args ? args : "");
/* open the path in MLSD mode */
ftp_xfer_dir(session, args, XFER_DIR_MLSD, true);
}
/*! @fn static void MLST(ftp_session_t *session, const char *args)
*
* @brief set transfer mode
*
* @param[in] session ftp session
* @param[in] args arguments
*/
FTP_DECLARE(MLST)
{
struct stat st;
int rc;
char *path;
size_t len;
console_print(CYAN "%s %s\n" RESET, __func__, args ? args : "");
ftp_session_set_state(session, COMMAND_STATE, 0);
/* build the path */
if(build_path(session, session->cwd, args) != 0)
{
ftp_send_response(session, 501, "%s\r\n", strerror(errno));
return;
}
/* stat path */
rc = lstat(session->buffer, &st);
if(rc != 0)
{
ftp_send_response(session, 550, "%s\r\n", strerror(errno));
return;
}
/* encode \n in path */
len = session->buffersize;
path = encode_path(session->buffer, &len, true);
if(!path)
{
ftp_send_response(session, 550, "%s\r\n", strerror(ENOMEM));
return;
}
session->dir_mode = XFER_DIR_MLST;
rc = ftp_session_fill_dirent(session, &st, path, len);
free(path);
if(rc != 0)
{
ftp_send_response(session, 550, "%s\r\n", strerror(errno));
return;
}
path = malloc(session->buffersize);
if(!path)
{
ftp_send_response(session, 550, "%s\r\n", strerror(ENOMEM));
return;
}
memcpy(path, session->buffer, session->buffersize);
ftp_send_response(session, -250, "Status\r\n%s250 End\r\n", path);
free(path);
}
/*! @fn static void MODE(ftp_session_t *session, const char *args)
*
* @brief set transfer mode
@ -2909,7 +3269,7 @@ FTP_DECLARE(OPTS)
ftp_session_set_state(session, COMMAND_STATE, 0);
/* we only accept the following options */
/* we accept the following UTF8 options */
if(strcasecmp(args, "UTF8") == 0
|| strcasecmp(args, "UTF8 ON") == 0
|| strcasecmp(args, "UTF8 NLST") == 0)
@ -2918,6 +3278,56 @@ FTP_DECLARE(OPTS)
return;
}
/* check MLST options */
if(strncasecmp(args, "MLST ", 5) == 0)
{
static const struct
{
const char *name;
session_mlst_flags_t flag;
} mlst_flags[] =
{
{ "Type;", SESSION_MLST_TYPE, },
{ "Size;", SESSION_MLST_SIZE, },
{ "Modify;", SESSION_MLST_MODIFY, },
{ "Perm;", SESSION_MLST_PERM, },
{ "UNIX.mode;", SESSION_MLST_UNIX_MODE, },
};
static const size_t num_mlst_flags = sizeof(mlst_flags)/sizeof(mlst_flags[0]);
session_mlst_flags_t flags = 0;
args += 5;
const char *p = args;
while(*p)
{
for(size_t i = 0; i < num_mlst_flags; ++i)
{
if(strncasecmp(mlst_flags[i].name, p, strlen(mlst_flags[i].name)) == 0)
{
flags |= mlst_flags[i].flag;
p += strlen(mlst_flags[i].name)-1;
break;
}
}
while(*p && *p != ';')
++p;
if(*p == ';')
++p;
}
session->mlst_flags = flags;
ftp_send_response(session, 200, "MLST OPTS%s%s%s%s%s%s\r\n",
flags ? " " : "",
flags & SESSION_MLST_TYPE ? "Type;" : "",
flags & SESSION_MLST_SIZE ? "Size;" : "",
flags & SESSION_MLST_MODIFY ? "Modify;" : "",
flags & SESSION_MLST_PERM ? "Perm;" : "",
flags & SESSION_MLST_UNIX_MODE ? "UNIX.mode;" : "");
return;
}
ftp_send_response(session, 504, "invalid argument\r\n");
}