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ftpd.c
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/*
* Copyright (c) 2002 Florian Schulze.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the authors nor the names of the contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* ftpd.c - This file is part of the FTP daemon for lwIP
*
*/
/*
* 2021-12-28: Modified by Terje Io for grblHAL networking
* 2022-08-25: Modified by Terje Io for grblHAL VFS
*/
/*
* Based on this version: https://github.com/toelke/lwip-ftpd
*/
#ifdef ARDUINO
#include "../driver.h"
#include "../grbl/vfs.h"
#include "../grbl/stream_file.h"
#else
#include "driver.h"
#include "grbl/vfs.h"
#include "grbl/stream_file.h"
#endif
#if FTP_ENABLE
#include <stdio.h>
#include <stdarg.h>
#include <ctype.h>
#include <string.h>
#include <time.h>
#include "lwip/debug.h"
#include "lwip/stats.h"
#include "lwip/tcp.h"
#include "ftpd.h"
#include "sfifo.h"
#include "../sdcard/sdcard.h"
#ifndef FTPD_POLL_INTERVAL
#define FTPD_POLL_INTERVAL 4
#endif
#ifdef LWIP_DEBUGF
#undef LWIP_DEBUGF
#endif
#define FTPD_DEBUG 0
#if FTPD_DEBUG
#define LWIP_DEBUGF(debug, message) do { dbg message; } while(0)
void dbg (char *msg, ...)
{
char buffer[200];
va_list arg;
va_start(arg, msg);
vsprintf(buffer, msg, arg);
va_end(arg);
hal.stream.write(buffer);
}
#else
#define LWIP_DEBUGF(debug, message)
#endif
#define TELNET_IAC 255
#ifndef FTP_TXPOLL
#define FTP_TXPOLL 0
#endif
#ifndef EINVAL
#define EINVAL 1
#define ENOMEM 2
#define ENODEV 3
#endif
//PROGMEM static const char *msg110 = "110 MARK %s = %s.";
/*
110 Restart marker reply.
In this case, the text is exact and not left to the
particular implementation; it must read:
MARK yyyy = mmmm
Where yyyy is User-process data stream marker, and mmmm
server's equivalent marker (note the spaces between markers
and "=").
*/
//PROGMEM static const char *msg120 = "120 Service ready in nnn minutes.";
//PROGMEM static const char *msg125 = "125 Data connection already open; transfer starting.";
PROGMEM static const char *msg150 = "150 File status okay; about to open data connection.";
PROGMEM static const char *msg150recv = "150 Opening BINARY mode data connection for %s (%i bytes).";
PROGMEM static const char *msg150stor = "150 Opening BINARY mode data connection for %s.";
PROGMEM static const char *msg200 = "200 Command okay.";
//PROGMEM static const char *msg202 = "202 Command not implemented, superfluous at this site.";
//PROGMEM static const char *msg211 = "211 System status, or system help reply.";
//PROGMEM static const char *msg212 = "212 Directory status.";
//PROGMEM static const char *msg213 = "213 File status.";
//PROGMEM static const char *msg214 = "214 %s.";
/*
214 Help message.
On how to use the server or the meaning of a particular
non-standard command. This reply is useful only to the
human user.
*/
PROGMEM static const char *msg214SYST = "214 %s system type.";
/*
215 NAME system type.
Where NAME is an official system name from the list in the
Assigned Numbers document.
*/
PROGMEM static const char *msg220 = "220 lwIP FTP Server ready.";
/*
220 Service ready for new user.
*/
PROGMEM static const char *msg221 = "221 Goodbye.";
/*
221 Service closing control connection.
Logged out if appropriate.
*/
//PROGMEM static const char *msg225 = "225 Data connection open; no transfer in progress.";
PROGMEM static const char *msg226 = "226 Closing data connection.";
/*
Requested file action successful (for example, file
transfer or file abort).
*/
PROGMEM static const char *msg227 = "227 Entering Passive Mode (%i,%i,%i,%i,%i,%i).";
/*
227 Entering Passive Mode (h1,h2,h3,h4,p1,p2).
*/
PROGMEM static const char *msg230 = "230 User logged in, proceed.";
PROGMEM static const char *msg250 = "250 Requested file action okay, completed.";
PROGMEM static const char *msg257PWD = "257 \"%s\" is current directory.";
PROGMEM static const char *msg257 = "257 \"%s\" created.";
/*
257 "PATHNAME" created.
*/
PROGMEM static const char *msg331 = "331 User name okay, need password.";
//PROGMEM static const char *msg332 = "332 Need account for login.";
PROGMEM static const char *msg350 = "350 Requested file action pending further information.";
//PROGMEM static const char *msg421 = "421 Service not available, closing control connection.";
/*
This may be a reply to any command if the service knows it
must shut down.
*/
//PROGMEM static const char *msg425 = "425 Can't open data connection.";
//PROGMEM static const char *msg426 = "426 Connection closed; transfer aborted.";
PROGMEM static const char *msg450 = "450 Requested file action not taken.";
/*
File unavailable (e.g., file busy).
*/
PROGMEM static const char *msg451 = "451 Requested action aborted: local error in processing.";
PROGMEM static const char *msg452 = "452 Requested action not taken.";
/*
Insufficient storage space in system.
*/
//PROGMEM static const char *msg500 = "500 Syntax error, command unrecognized.";
/*
This may include errors such as command line too long.
*/
PROGMEM static const char *msg501 = "501 Syntax error in parameters or arguments.";
PROGMEM static const char *msg502 = "502 Command not implemented.";
PROGMEM static const char *msg503 = "503 Bad sequence of commands.";
//PROGMEM static const char *msg504 = "504 Command not implemented for that parameter.";
//PROGMEM static const char *msg530 = "530 Not logged in.";
//PROGMEM static const char *msg532 = "532 Need account for storing files.";
PROGMEM static const char *msg550 = "550 Requested action not taken.";
/*
File unavailable (e.g., file not found, no access).
*/
//PROGMEM static const char *msg551 = "551 Requested action aborted: page type unknown.";
//PROGMEM static const char *msg552 = "552 Requested file action aborted.";
/*
Exceeded storage allocation (for current directory or
dataset).
*/
//PROGMEM static const char *msg553 = "553 Requested action not taken.";
/*
File name not allowed.
*/
enum ftpd_state_e {
FTPD_USER,
FTPD_PASS,
FTPD_IDLE,
FTPD_NLST,
FTPD_LIST,
FTPD_RETR,
FTPD_RNFR,
FTPD_STOR,
FTPD_QUIT
};
PROGMEM static const char *month_table[12] = {
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec"
};
typedef struct {
int connected;
int eof;
vfs_dir_t *vfs_dir;
vfs_dirent_t *vfs_dirent;
vfs_file_t *vfs_file;
sfifo_t fifo;
struct tcp_pcb *msgpcb;
struct ftpd_msgstate *msgfs;
} ftpd_datastate_t;
typedef struct {
char *text;
int len;
} ftpd_cmd_t;
typedef struct ftpd_msgstate {
enum ftpd_state_e state;
sfifo_t fifo;
vfs_t *vfs;
struct ip4_addr dataip;
u16_t dataport;
struct tcp_pcb *datalistenpcb;
struct tcp_pcb *datapcb;
ftpd_datastate_t *datafs;
int passive;
char *renamefrom;
ftpd_cmd_t cmd;
} ftpd_msgstate_t;
#if FTP_TXPOLL
static struct {
ftpd_datastate_t *fsd;
struct tcp_pcb *pcb;
} poll;
#endif
static void send_msg (struct tcp_pcb *pcb, ftpd_msgstate_t *fsm, const char *msg, ...);
static void ftpd_dataerr (void *arg, err_t err)
{
ftpd_datastate_t *fsd = arg;
LWIP_DEBUGF(FTPD_DEBUG, ("ftpd_dataerr: %s (%i)\n", lwip_strerr(err), err));
if (fsd != NULL) {
fsd->msgfs->datafs = NULL;
fsd->msgfs->state = FTPD_IDLE;
free(fsd);
}
}
static void ftpd_dataclose (struct tcp_pcb *pcb, ftpd_datastate_t *fsd)
{
if(fsd->vfs_file)
vfs_close(fsd->vfs_file);
if(fsd->vfs_dir)
vfs_closedir(fsd->vfs_dir);
tcp_arg(pcb, NULL);
tcp_sent(pcb, NULL);
tcp_recv(pcb, NULL);
if (fsd->msgfs) {
if (fsd->msgfs->datalistenpcb) {
tcp_arg(fsd->msgfs->datalistenpcb, NULL);
tcp_accept(fsd->msgfs->datalistenpcb, NULL);
tcp_close(fsd->msgfs->datalistenpcb);
fsd->msgfs->datalistenpcb = NULL;
}
fsd->msgfs->datafs = NULL;
fsd->msgfs->state = FTPD_IDLE;
}
sfifo_close(&fsd->fifo);
free(fsd);
tcp_arg(pcb, NULL);
tcp_close(pcb);
}
static void send_data (struct tcp_pcb *pcb, ftpd_datastate_t *fsd)
{
u16_t len;
if ((len = sfifo_used(&fsd->fifo)) > 0) {
int i = fsd->fifo.readpos;
/* We cannot send more data than space available in the send buffer. */
len = tcp_sndbuf(pcb) < len ? tcp_sndbuf(pcb) : len;
LWIP_DEBUGF(FTPD_DEBUG, ("send_data: %d %d %d\n", len, i, *(fsd->fifo.buffer + i)));
if ((i + len) > fsd->fifo.size) {
if (tcp_write(pcb, fsd->fifo.buffer + i, (u16_t)(fsd->fifo.size - i), 1) != ERR_OK) {
LWIP_DEBUGF(FTPD_DEBUG, ("send_data: error writing!\n"));
return;
}
len -= fsd->fifo.size - i;
fsd->fifo.readpos = 0;
i = 0;
}
if (tcp_write(pcb, fsd->fifo.buffer + i, len, 1) != ERR_OK) {
LWIP_DEBUGF(FTPD_DEBUG, ("send_data: error writing!\n"));
return;
}
fsd->fifo.readpos += len;
if(fsd->eof && sfifo_used(&fsd->fifo) == 0)
tcp_output(pcb);
}
}
static void send_file (ftpd_datastate_t *fsd, struct tcp_pcb *pcb)
{
if (!fsd->connected)
return;
int len = 0;
if (fsd->vfs_file) {
static char buffer[512];
LWIP_DEBUGF(FTPD_DEBUG, ("send_file: %d\n", sfifo_space(&fsd->fifo)));
while((len = sfifo_space(&fsd->fifo)) > 256) {
len = vfs_read(buffer, 1, len > sizeof(buffer) ? sizeof(buffer) : len, fsd->vfs_file);
if (vfs_errno) {
fsd->vfs_file = NULL; /* FS error */
break;
}
if (len > 0)
sfifo_write(&fsd->fifo, buffer, len);
if ((fsd->eof = vfs_eof(fsd->vfs_file))) {
vfs_close(fsd->vfs_file);
fsd->vfs_file = NULL;
break;
}
}
if(len >= 0)
send_data(pcb, fsd);
}
if (!fsd->vfs_file) {
if (len >= 0 && sfifo_used(&fsd->fifo) > 0) {
send_data(pcb, fsd);
return;
}
ftpd_msgstate_t *fsm = fsd->msgfs;
struct tcp_pcb *msgpcb = fsd->msgpcb;
ftpd_dataclose(pcb, fsd);
send_msg(msgpcb, fsm, len < 0 ? msg451 : msg226);
}
}
static void send_next_directory (ftpd_datastate_t *fsd, struct tcp_pcb *pcb, int shortlist)
{
int len;
char buffer[512];
while (1) {
if (fsd->vfs_dirent == NULL)
fsd->vfs_dirent = vfs_readdir(fsd->vfs_dir);
if (fsd->vfs_dirent) {
if (shortlist) {
len = sprintf(buffer, "%s\r\n", fsd->vfs_dirent->name);
if (sfifo_space(&fsd->fifo) < len) {
send_data(pcb, fsd);
return;
}
sfifo_write(&fsd->fifo, buffer, len);
fsd->vfs_dirent = NULL;
} else {
vfs_stat_t st;
time_t current_time = (time_t)-1;
int current_year;
struct tm *s_time;
#ifndef __IMXRT1062__
time(¤t_time);
#endif
s_time = gmtime(¤t_time);
current_year = s_time->tm_year;
strcat(strcpy(buffer, "/"), fsd->vfs_dirent->name);
// vfs_stat(fsd->vfs_dirent->name, &st);
vfs_stat(fsd->vfs_dirent->name, &st);
#ifdef ESP_PLATFORM
s_time = gmtime(&st.st_mtim);
#else
s_time = gmtime(&st.st_mtime);
#endif
if (s_time->tm_year == current_year)
len = sprintf(buffer, "-rw-rw-rw- 1 user ftp %11" UINT32SFMT " %s %02i %02i:%02i %s\r\n", (uint32_t)st.st_size, month_table[s_time->tm_mon], s_time->tm_mday, s_time->tm_hour, s_time->tm_min, fsd->vfs_dirent->name);
else
len = sprintf(buffer, "-rw-rw-rw- 1 user ftp %11" UINT32SFMT " %s %02i %5i %s\r\n", (uint32_t)st.st_size, month_table[s_time->tm_mon], s_time->tm_mday, s_time->tm_year + 1900, fsd->vfs_dirent->name);
if (st.st_mode.directory)
buffer[0] = 'd';
if (sfifo_space(&fsd->fifo) < len) {
send_data(pcb, fsd);
return;
}
sfifo_write(&fsd->fifo, buffer, len);
fsd->vfs_dirent = NULL;
}
} else {
if (sfifo_used(&fsd->fifo) > 0) {
send_data(pcb, fsd);
return;
}
ftpd_msgstate_t *fsm = fsd->msgfs;
struct tcp_pcb *msgpcb = fsd->msgpcb;
ftpd_dataclose(pcb, fsd);
fsm->datapcb = NULL;
send_msg(msgpcb, fsm, msg226);
return;
}
}
}
static err_t ftpd_datasent (void *arg, struct tcp_pcb *pcb, u16_t len)
{
ftpd_datastate_t *fsd = arg;
switch (fsd->msgfs->state) {
case FTPD_LIST:
send_next_directory(fsd, pcb, 0);
break;
case FTPD_NLST:
send_next_directory(fsd, pcb, 1);
break;
case FTPD_RETR:
#if FTP_TXPOLL
poll.fsd = fsd;
poll.pcb = pcb;
#else
send_file(fsd, pcb);
#endif
break;
default:
break;
}
return ERR_OK;
}
static err_t ftpd_datarecv (void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
{
ftpd_datastate_t *fsd = arg;
if (err == ERR_OK && p != NULL) {
u16_t tot_len = 0;
struct pbuf *q = p;
do {
int len;
len = vfs_write(q->payload, 1, q->len, fsd->vfs_file);
tot_len += len;
if (len != q->len)
break;
} while((q = q->next));
/* Inform TCP that we have taken the data. */
tcp_recved(pcb, tot_len);
pbuf_free(p);
}
if (err == ERR_OK && p == NULL) {
ftpd_msgstate_t *fsm = fsd->msgfs;
struct tcp_pcb *msgpcb = fsd->msgpcb;
ftpd_dataclose(pcb, fsd);
fsm->datapcb = NULL;
send_msg(msgpcb, fsm, msg226);
}
return ERR_OK;
}
static err_t ftpd_dataconnected (void *arg, struct tcp_pcb *pcb, err_t err)
{
ftpd_datastate_t *fsd = arg;
fsd->msgfs->datapcb = pcb;
fsd->connected = 1;
/* Tell TCP that we wish to be informed of incoming data by a call
to the ftpd_datarecv() function. */
tcp_recv(pcb, ftpd_datarecv);
/* Tell TCP that we wish be to informed of data that has been
successfully sent by a call to the ftpd_sent() function. */
tcp_sent(pcb, ftpd_datasent);
tcp_err(pcb, ftpd_dataerr);
switch (fsd->msgfs->state) {
case FTPD_LIST:
send_next_directory(fsd, pcb, 0);
break;
case FTPD_NLST:
send_next_directory(fsd, pcb, 1);
break;
case FTPD_RETR:
#if FTP_TXPOLL
poll.fsd = fsd;
poll.pcb = pcb;
#else
send_file(fsd, pcb);
#endif
break;
default:
break;
}
return ERR_OK;
}
static int open_dataconnection (struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
if (fsm->passive)
return 0;
/* Allocate memory for the structure that holds the state of the connection. */
fsm->datafs = malloc(sizeof(ftpd_datastate_t));
if (fsm->datafs == NULL) {
LWIP_DEBUGF(FTPD_DEBUG, ("open_dataconnection: Out of memory\n"));
send_msg(pcb, fsm, msg451);
return 1;
}
memset(fsm->datafs, 0, sizeof(ftpd_datastate_t));
fsm->datafs->msgfs = fsm;
fsm->datafs->msgpcb = pcb;
if (sfifo_init(&fsm->datafs->fifo, 2000) != 0) {
free(fsm->datafs);
send_msg(pcb, fsm, msg451);
return 1;
}
fsm->datapcb = tcp_new();
if (fsm->datapcb == NULL) {
sfifo_close(&fsm->datafs->fifo);
free(fsm->datafs);
send_msg(pcb, fsm, msg451);
return 1;
}
/* Tell TCP that this is the structure we wish to be passed for our callbacks. */
tcp_arg(fsm->datapcb, fsm->datafs);
ip_addr_t dataip;
IP_SET_TYPE_VAL(dataip, IPADDR_TYPE_V4);
ip4_addr_copy(*ip_2_ip4(&dataip), fsm->dataip);
tcp_connect(fsm->datapcb, &dataip, fsm->dataport, ftpd_dataconnected);
LWIP_DEBUGF(FTPD_DEBUG, ("open con\n"));
return 0;
}
static void cmd_user (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, msg331);
fsm->state = FTPD_PASS;
/*
send_msg(pcb, fs, msgLoginFailed);
fs->state = FTPD_QUIT;
*/
}
static void cmd_pass (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, msg230);
fsm->state = FTPD_IDLE;
/*
send_msg(pcb, fs, msgLoginFailed);
fs->state = FTPD_QUIT;
*/
}
static void cmd_port (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
unsigned pHi, pLo;
unsigned ip[4];
if (sscanf(arg, "%u,%u,%u,%u,%u,%u", &(ip[0]), &(ip[1]), &(ip[2]), &(ip[3]), &pHi, &pLo) != 6)
send_msg(pcb, fsm, msg501);
else {
IP4_ADDR(&fsm->dataip, (u8_t) ip[0], (u8_t) ip[1], (u8_t) ip[2], (u8_t) ip[3]);
fsm->dataport = ((u16_t) pHi << 8) | (u16_t) pLo;
send_msg(pcb, fsm, msg200);
}
}
static void cmd_quit (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, msg221);
fsm->state = FTPD_QUIT;
}
static void cmd_cwd (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, vfs_chdir(vfs_fixpath(arg)) ? msg550 : msg250);
}
static void cmd_cdup (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, vfs_chdir("..") ? msg550 : msg250);
}
static void cmd_pwd (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
char *path;
if ((path = vfs_getcwd(NULL, 0))) {
send_msg(pcb, fsm, msg257PWD, path);
free(path);
} else
send_msg(pcb, fsm, msg550);
}
static void cmd_list_common (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm, int shortlist)
{
vfs_dir_t *vfs_dir;
char *cwd;
if (!(cwd = vfs_getcwd(NULL, 0))) {
send_msg(pcb, fsm, msg451);
return;
}
vfs_dir = vfs_opendir(cwd);
free(cwd);
if (!vfs_dir) {
send_msg(pcb, fsm, msg451);
return;
}
if (open_dataconnection(pcb, fsm) != 0) {
vfs_closedir(vfs_dir);
return;
}
fsm->datafs->vfs_dir = vfs_dir;
fsm->datafs->vfs_dirent = NULL;
fsm->state = shortlist ? FTPD_NLST : FTPD_LIST;
send_msg(pcb, fsm, msg150);
}
static void cmd_nlst (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
cmd_list_common(arg, pcb, fsm, 1);
}
static void cmd_list (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
cmd_list_common(arg, pcb, fsm, 0);
}
static void cmd_retr (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
vfs_file_t *vfs_file;
vfs_stat_t st;
vfs_stat(arg, &st);
if (st.st_mode.directory) {
send_msg(pcb, fsm, msg550);
return;
}
if (!(vfs_file = vfs_open(arg, "rb"))) {
send_msg(pcb, fsm, msg550);
return;
}
send_msg(pcb, fsm, msg150recv, arg, st.st_size);
if (open_dataconnection(pcb, fsm) != 0) {
vfs_close(vfs_file);
return;
}
fsm->datafs->vfs_file = vfs_file;
fsm->state = FTPD_RETR;
}
static void cmd_stor (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
vfs_file_t *vfs_file;
if (!(vfs_file = vfs_open(arg, "wb"))) {
send_msg(pcb, fsm, msg550);
return;
}
send_msg(pcb, fsm, msg150stor, arg);
if (open_dataconnection(pcb, fsm) != 0) {
vfs_close(vfs_file);
return;
}
fsm->datafs->vfs_file = vfs_file;
fsm->state = FTPD_STOR;
}
static void cmd_noop (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, msg200);
}
static void cmd_syst (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
send_msg(pcb, fsm, msg214SYST, "UNIX");
}
static void cmd_pasv (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
static u16_t port = 4096;
static u16_t start_port = 4096;
struct tcp_pcb *temppcb;
/* Allocate memory for the structure that holds the state of the connection. */
if (!(fsm->datafs = malloc(sizeof(ftpd_datastate_t)))) {
LWIP_DEBUGF(FTPD_DEBUG, ("cmd_pasv: Out of memory\n"));
send_msg(pcb, fsm, msg451);
return;
}
memset(fsm->datafs, 0, sizeof(ftpd_datastate_t));
if (sfifo_init(&fsm->datafs->fifo, 3000) != 0) {
free(fsm->datafs);
send_msg(pcb, fsm, msg451);
return;
}
if (!(fsm->datalistenpcb = tcp_new())) {
free(fsm->datafs);
sfifo_close(&fsm->datafs->fifo);
send_msg(pcb, fsm, msg451);
return;
}
start_port = port;
while (1) {
err_t err;
if(++port > 0x7fff)
port = 4096;
fsm->dataport = port;
if ((err = tcp_bind(fsm->datalistenpcb, (ip_addr_t*)&pcb->local_ip, fsm->dataport)) == ERR_OK)
break;
if (start_port == port)
err = ERR_CLSD;
if (err == ERR_USE)
continue;
else {
ftpd_dataclose(fsm->datalistenpcb, fsm->datafs);
fsm->datalistenpcb = NULL;
fsm->datafs = NULL;
return;
}
}
if (!(temppcb = tcp_listen(fsm->datalistenpcb))) {
LWIP_DEBUGF(FTPD_DEBUG, ("cmd_pasv: tcp_listen failed\n"));
ftpd_dataclose(fsm->datalistenpcb, fsm->datafs);
fsm->datalistenpcb = NULL;
fsm->datafs = NULL;
return;
}
fsm->datalistenpcb = temppcb;
fsm->passive = 1;
fsm->datafs->connected = 0;
fsm->datafs->msgfs = fsm;
fsm->datafs->msgpcb = pcb;
/* Tell TCP that this is the structure we wish to be passed for our callbacks. */
tcp_arg(fsm->datalistenpcb, fsm->datafs);
tcp_accept(fsm->datalistenpcb, ftpd_dataconnected);
send_msg(pcb, fsm, msg227, ip4_addr1(ip_2_ip4(&pcb->local_ip)), ip4_addr2(ip_2_ip4(&pcb->local_ip)), ip4_addr3(ip_2_ip4(&pcb->local_ip)), ip4_addr4(ip_2_ip4(&pcb->local_ip)), (fsm->dataport >> 8) & 0xff, (fsm->dataport) & 0xff);
}
static void cmd_abrt (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
if (fsm->datafs != NULL) {
tcp_arg(fsm->datapcb, NULL);
tcp_sent(fsm->datapcb, NULL);
tcp_recv(fsm->datapcb, NULL);
tcp_abort(pcb);
sfifo_close(&fsm->datafs->fifo);
free(fsm->datafs);
fsm->datafs = NULL;
}
fsm->state = FTPD_IDLE;
}
static void cmd_type (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
LWIP_DEBUGF(FTPD_DEBUG, ("Got TYPE -%s-\n", arg));
// if(strcmp(arg, "I") != 0) {
// send_msg(pcb, fsm, msg502);
// return;
// }
send_msg(pcb, fsm, msg200);
}
static void cmd_mode (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
LWIP_DEBUGF(FTPD_DEBUG, ("Got MODE -%s-\n", arg));
send_msg(pcb, fsm, msg502);
}
static void cmd_rnfr (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
if (arg == NULL || *arg == '\0') {
send_msg(pcb, fsm, msg501);
return;
}
if (fsm->renamefrom)
free(fsm->renamefrom);
fsm->renamefrom = malloc(strlen(arg) + 1);
if (fsm->renamefrom == NULL) {
LWIP_DEBUGF(FTPD_DEBUG, ("cmd_rnfr: Out of memory\n"));
send_msg(pcb, fsm, msg451);
return;
}
strcpy(fsm->renamefrom, arg);
fsm->state = FTPD_RNFR;
send_msg(pcb, fsm, msg350);
}
static void cmd_rnto (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
if (fsm->state != FTPD_RNFR) {
send_msg(pcb, fsm, msg503);
return;
}
fsm->state = FTPD_IDLE;
if (arg == NULL) {
send_msg(pcb, fsm, msg501);
return;
}
if (*arg == '\0') {
send_msg(pcb, fsm, msg501);
return;
}
send_msg(pcb, fsm, vfs_rename(fsm->renamefrom, arg) ? msg450 : msg250);
}
static void cmd_mkd (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
if (arg == NULL || *arg == '\0') {
send_msg(pcb, fsm, msg501);
return;
}
send_msg(pcb, fsm, vfs_mkdir(arg /*, VFS_IRWXU | VFS_IRWXG | VFS_IRWXO*/) ? msg550 : msg257, arg);
}
static void cmd_rmd (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
vfs_stat_t st;
if (arg == NULL || *arg == '\0') {
send_msg(pcb, fsm, msg501);
return;
}
if (vfs_stat(vfs_fixpath(arg), &st) != 0) {
send_msg(pcb, fsm, msg550);
return;
}
if (!st.st_mode.directory) {
send_msg(pcb, fsm, msg550);
return;
}
send_msg(pcb, fsm, vfs_rmdir(arg) ? msg550 : msg250);
}
static void cmd_dele (char *arg, struct tcp_pcb *pcb, ftpd_msgstate_t *fsm)
{
vfs_stat_t st;
if (arg == NULL || *arg == '\0') {
send_msg(pcb, fsm, msg501);
return;
}
if (vfs_stat(arg, &st) != 0) {
send_msg(pcb, fsm, msg550);
return;
}
if (st.st_mode.directory) {
send_msg(pcb, fsm, msg550);
return;
}
send_msg(pcb, fsm, vfs_unlink(arg) ? msg550 : msg250);
}
typedef struct {
char const *const cmd;
void (*func) (char *arg, struct tcp_pcb * pcb, ftpd_msgstate_t * fsm);
bool check_busy;
} ftpd_command_t;
static const ftpd_command_t ftpd_commands[] = {
{"USER", cmd_user, 0},
{"PASS", cmd_pass, 0},
{"PORT", cmd_port, 0},
{"QUIT", cmd_quit, 0},
{"CWD", cmd_cwd, 1},
{"CDUP", cmd_cdup, 1},
{"PWD", cmd_pwd, 0},
{"XPWD", cmd_pwd, 0},
{"NLST", cmd_nlst, 1},
{"LIST", cmd_list, 1},
{"RETR", cmd_retr, 1},
{"STOR", cmd_stor, 1},
{"NOOP", cmd_noop, 0},
{"SYST", cmd_syst, 0},
{"ABOR", cmd_abrt, 0},
{"TYPE", cmd_type, 0},
{"MODE", cmd_mode, 0},
{"RNFR", cmd_rnfr, 1},
{"RNTO", cmd_rnto, 1},