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b844272610
mc/vfs/ftpfs.c
Pavel Machek b844272610 Minor bug fix.
1998-09-23 11:37:29 +00:00

1849 lines
45 KiB
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/* Virtual File System: FTP file system.
Copyright (C) 1995 The Free Software Foundation
Written by: 1995 Ching Hui
1995 Jakub Jelinek
1995, 1996, 1997 Miguel de Icaza
1997 Norbert Warmuth
1998 Pavel Machek
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* FTPfs TODO:
- make it more robust - all the connects etc. should handle EADDRINUSE and
ERETRY (have I spelled these names correctly?)
- make the user able to flush a connection - all the caches will get empty
etc., (tarfs as well), we should give there a user selectable timeout
and assign a key sequence.
- use hash table instead of linklist to cache ftpfs directory.
*/
#include <config.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <stdarg.h>
#include <fcntl.h>
#include <pwd.h>
#include <ctype.h> /* For isdigit */
#ifdef SCO_FLAVOR
# include <sys/timeb.h> /* alex: for struct timeb definition */
#endif /* SCO_FLAVOR */
#include <time.h>
#include <sys/types.h>
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#if HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#include "../src/fs.h"
#include "../src/mad.h"
#include "../src/setup.h"
#include "../src/tty.h" /* enable/disable interrupt key */
#include "../src/main.h"
#include <netdb.h> /* struct hostent */
#include <sys/socket.h> /* AF_INET */
#include <netinet/in.h> /* struct in_addr */
#ifdef HAVE_SETSOCKOPT
# include <netinet/ip.h> /* IP options */
#endif
#include <arpa/inet.h>
#include <arpa/ftp.h>
#include <arpa/telnet.h>
#ifndef SCO_FLAVOR
# include <sys/time.h> /* alex: this redefines struct timeval */
#endif /* SCO_FLAVOR */
#include <sys/param.h>
#ifdef USE_TERMNET
#include <termnet.h>
#endif
#include "../src/mem.h"
#define WANT_PARSE_LS_LGA
#include "vfs.h"
#include "tcputil.h"
#include "../src/util.h"
#include "../src/dialog.h"
#include "container.h"
#include "ftpfs.h"
#ifndef MAXHOSTNAMELEN
# define MAXHOSTNAMELEN 64
#endif
#define UPLOAD_ZERO_LENGTH_FILE
static int my_errno;
static int code;
/* Delay to retry a connection */
int ftpfs_retry_seconds = 30;
/* Method to use to connect to ftp sites */
int ftpfs_use_passive_connections = 1;
/* Method used to get directory listings:
1: try 'LIST -la <path>', if it fails
fall back to CWD <path>; LIST
0: always use CWD <path>; LIST
*/
int ftpfs_use_unix_list_options = 1;
/* Use the ~/.netrc */
int use_netrc = 1;
extern char *home_dir;
/* Anonymous setup */
char *ftpfs_anonymous_passwd = 0;
int ftpfs_directory_timeout;
/* Proxy host */
char *ftpfs_proxy_host = 0;
/* Reget flag */
int do_reget = 0;
/* wether we have to use proxy by default? */
int ftpfs_always_use_proxy;
/* source routing host */
extern int source_route;
/* Where we store the transactions */
static FILE *logfile = NULL;
/* If true, the directory cache is forced to reload */
static int force_expiration = 0;
static struct linklist *connections_list;
/* command wait_flag: */
#define NONE 0x00
#define WAIT_REPLY 0x01
#define WANT_STRING 0x02
static char reply_str [80];
static char *ftpfs_get_current_directory(struct connection *bucket);
static int __ftpfs_chdir (struct connection *bucket ,char *remote_path);
static struct direntry *_get_file_entry(struct connection *bucket,
char *file_name, int op, int flags);
static void free_bucket (void *data);
static void connection_destructor(void *data);
static void flush_all_directory(struct connection *bucket);
static int get_line (int sock, char *buf, int buf_len, char term);
static char *get_path (struct connection **bucket, char *path);
/* Extract the hostname and username from the path */
/* path is in the form: [user@]hostname:port/remote-dir, e.g.:
* ftp://sunsite.unc.edu/pub/linux
* ftp://miguel@sphinx.nuclecu.unam.mx/c/nc
* ftp://tsx-11.mit.edu:8192/
* ftp://joe@foo.edu:11321/private
* If the user is empty, e.g. ftp://@roxanne/private, then your login name
* is supplied.
* */
static char *my_get_host_and_username (char *path, char **host, char **user, int *port, char **pass)
{
return get_host_and_username (path, host, user, port, 21, 1, pass);
}
/* Returns a reply code, check /usr/include/arpa/ftp.h for possible values */
static int get_reply (int sock, char *string_buf, int string_len)
{
char answer[1024];
int i;
for (;;) {
if (!get_line(sock, answer, sizeof(answer), '\n')) {
if (string_buf)
*string_buf = 0;
code = 421;
return 4;
}
switch(sscanf(answer, "%d", &code)) {
case 0:
if (string_buf) {
strncpy(string_buf, answer, string_len - 1);
*(string_buf + string_len - 1) = 0;
}
code = 500;
return 5;
case 1:
if (answer[3] == '-') {
while (1) {
if (!get_line(sock, answer, sizeof(answer), '\n')) {
if (string_buf)
*string_buf = 0;
code = 421;
return 4;
}
if ((sscanf(answer, "%d", &i) > 0) &&
(code == i) && (answer[3] == ' '))
break;
}
}
if (string_buf) {
strncpy(string_buf, answer, string_len - 1);
*(string_buf + string_len - 1) = 0;
}
return code / 100;
}
}
}
static int command (struct connection *bucket, int wait_reply,
char *fmt, ...)
{
va_list ap;
char buf[2048]; /* FIXME: buffer exceed ?? */
int n, status;
int sock = qsock (bucket);
va_start (ap, fmt);
vsprintf (buf, fmt, ap);
va_end (ap);
n = strlen(buf);
buf[n++] = '\r';
buf[n++] = '\n';
buf[n] = 0;
if (logfile){
if (strncmp (buf, "PASS ", 5) == 0) {
char *tmp = "PASS <Password not logged>\r\n";
fwrite (tmp, strlen (tmp), 1, logfile);
} else
fwrite (buf, strlen (buf), 1, logfile);
fflush (logfile);
}
got_sigpipe = 0;
enable_interrupt_key();
status = write(sock, buf, strlen(buf));
if (status < 0){
code = 421;
if (errno == EPIPE){
got_sigpipe = 1;
}
disable_interrupt_key();
return TRANSIENT;
}
disable_interrupt_key();
if (wait_reply)
return get_reply (sock, (wait_reply & WANT_STRING) ? reply_str : NULL, sizeof (reply_str)-1);
return COMPLETE;
}
static void
connection_close (void *data)
{
struct connection *bucket = data;
if (qsock (bucket) != -1){
print_vfs_message ("ftpfs: Disconnecting from %s", qhost(bucket));
command(bucket, NONE, "QUIT");
close(qsock(bucket));
}
}
/* some defines only used by changetype */
/* These two are valid values for the second parameter */
#define TYPE_ASCII 0
#define TYPE_BINARY 1
/* This one is only used to initialize bucket->isbinary, don't use it as
second parameter to changetype. */
#define TYPE_UNKNOWN -1
static int
changetype (struct connection *bucket, int binary)
{
if (binary != bucket->isbinary) {
if (command (bucket, WAIT_REPLY, "TYPE %c", binary ? 'I' : 'A') != COMPLETE) ERRNOR (EIO, -1);
bucket->isbinary = binary;
}
return binary;
}
/* This routine logs the user in */
static int
login_server (struct connection *bucket, char *netrcpass)
{
#if defined(HSC_PROXY)
char *proxypass, *proxyname;
#endif
char *pass;
char *op;
char *name; /* login user name */
int anon = 0;
bucket->isbinary = TYPE_UNKNOWN;
if (netrcpass)
op = strdup (netrcpass);
else {
if (!strcmp (quser(bucket), "anonymous") ||
!strcmp (quser(bucket), "ftp")) {
op = strdup(ftpfs_anonymous_passwd);
anon = 1;
} else {
char *p;
if (!bucket->password){
p = copy_strings (" FTP: Password required for ", quser(bucket),
" ", NULL);
op = vfs_get_password (p);
free (p);
if (op == NULL) ERRNOR (EPERM, 0);
bucket->password = strdup (op);
} else
op = strdup (bucket->password);
}
}
if (!anon || logfile)
pass = strdup (op);
else
pass = copy_strings ("-", op, 0);
wipe_password (op);
/* Proxy server accepts: username@host-we-want-to-connect*/
if (qproxy (bucket)){
#if defined(HSC_PROXY)
char *p, *host;
int port;
p = my_get_host_and_username(ftpfs_proxy_host, &host, &proxyname,
&port, &proxypass);
if (p)
free (p);
free(host);
if (proxypass)
wipe_password (proxypass);
p = copy_strings(" Proxy: Password required for ", proxyname, " ",
NULL);
proxypass = vfs_get_password (p);
free(p);
if (proxypass == NULL) {
wipe_password (pass);
free (proxyname);
ERRNOR (EPERM, 0);
}
name = strdup(quser (bucket));
#else
name = copy_strings (quser(bucket), "@",
qhost(bucket)[0] == '!' ? qhost(bucket)+1 : qhost(bucket), 0);
#endif
} else
name = strdup (quser (bucket));
if (get_reply (qsock(bucket), NULL, 0) == COMPLETE) {
#if defined(HSC_PROXY)
if (qproxy(bucket)) {
print_vfs_message("ftpfs: sending proxy login name");
if (command (bucket, 1, "USER %s", proxyname) == CONTINUE) {
print_vfs_message("ftpfs: sending proxy user password");
if (command (bucket, 1, "PASS %s", proxypass) == COMPLETE)
{
print_vfs_message("ftpfs: proxy authentication succeeded");
if (command (bucket, 1, "SITE %s", qhost(bucket)+1) ==
COMPLETE) {
print_vfs_message("ftpfs: connected to %s", qhost(bucket)+1);
}
else {
bucket->failed_on_login = 1;
/* my_errno = E; */
if (proxypass)
wipe_password (proxypass);
wipe_password (pass);
free (proxyname);
free (name);
return 0;
}
}
else {
bucket->failed_on_login = 1;
/* my_errno = E; */
if (proxypass)
wipe_password (proxypass);
wipe_password (pass);
free (proxyname);
free (name);
return 0;
}
}
else {
bucket->failed_on_login = 1;
/* my_errno = E; */
if (proxypass)
wipe_password (proxypass);
wipe_password (pass);
free (proxyname);
free (name);
return 0;
}
if (proxypass)
wipe_password (proxypass);
free (proxyname);
}
#endif
print_vfs_message("ftpfs: sending login name");
code = command (bucket, WAIT_REPLY, "USER %s", name);
switch (code){
case CONTINUE:
print_vfs_message("ftpfs: sending user password");
if (command (bucket, WAIT_REPLY, "PASS %s", pass) != COMPLETE)
break;
case COMPLETE:
print_vfs_message("ftpfs: logged in");
wipe_password (pass);
free (name);
return 1;
default:
bucket->failed_on_login = 1;
/* my_errno = E; */
if (bucket->password)
wipe_password (bucket->password);
bucket->password = 0;
/* This matches the end of the code below, just to make it
* obvious to the optimizer
*/
wipe_password (pass);
free (name);
return 0;
}
}
print_vfs_message ("ftpfs: Login incorrect for user %s ", quser(bucket));
my_errno = EPERM;
wipe_password (pass);
free (name);
return 0;
}
#ifdef HAVE_SETSOCKOPT
static void
setup_source_route (int socket, int dest)
{
char buffer [20];
char *ptr = buffer;
if (!source_route)
return;
bzero (buffer, sizeof (buffer));
*ptr++ = IPOPT_LSRR;
*ptr++ = 3 + 8;
*ptr++ = 4; /* pointer */
/* First hop */
bcopy ((char *) &source_route, ptr, sizeof (int));
ptr += 4;
/* Second hop (ie, final destination) */
bcopy ((char *) &dest, ptr, sizeof (int));
ptr += 4;
while ((ptr - buffer) & 3)
ptr++;
if (setsockopt (socket, IPPROTO_IP, IP_OPTIONS,
buffer, ptr - buffer) < 0)
message_2s (1, MSG_ERROR, _(" Could not set source routing (%s)"), unix_error_string (errno));
}
#else
#define setup_source_route(x,y)
#endif
static struct no_proxy_entry {
char *domain;
void *next;
} *no_proxy;
static void
load_no_proxy_list ()
{
/* FixMe: shouldn't be hardcoded!!! */
char s[258]; /* provide for 256 characters and nl */
struct no_proxy_entry *np, *current = 0;
FILE *npf;
int c;
char *p;
char *mc_file;
static int loaded;
if (loaded)
return;
mc_file = concat_dir_and_file (mc_home, "mc.no_proxy");
if (exist_file (mc_file) &&
(npf = fopen (mc_file, "r"))) {
while (fgets (s, 258, npf) || !(feof (npf) || ferror (npf))) {
if (!(p = strchr (s, '\n'))) { /* skip bogus entries */
while ((c = getc (npf)) != EOF && c != '\n')
;
continue;
}
if (p == s)
continue;
*p = '\0';
p = xmalloc (strlen (s), "load_no_proxy_list:1");
np = xmalloc (sizeof (*np), "load_no_proxy_list:2");
strcpy (p, s);
np->domain = p;
np->next = 0;
if (no_proxy)
current->next = np;
else
no_proxy = np;
current = np;
}
fclose (npf);
loaded = 1;
}
free (mc_file);
}
static int
ftpfs_check_proxy (char *host)
{
struct no_proxy_entry *npe;
if (!ftpfs_proxy_host || !*ftpfs_proxy_host || !host || !*host)
return 0; /* sanity check */
if (*host == '!')
return 1;
if (!ftpfs_always_use_proxy)
return 0;
if (!strchr (host, '.'))
return 0;
load_no_proxy_list ();
for (npe = no_proxy; npe; npe=npe->next) {
char *domain = npe->domain;
if (domain[0] == '.') {
int ld = strlen (domain);
int lh = strlen (host);
while (ld && lh && host[lh - 1] == domain[ld - 1]) {
ld--;
lh--;
}
if (!ld)
return 0;
} else
if (!strcasecmp (host, domain))
return 0;
}
return 1;
}
static void
ftpfs_get_proxy_host_and_port (char *proxy, char **host, int *port)
{
char *user, *pass, *dir;
#if defined(HSC_PROXY)
#define HSC_DEFAULT_PORT 9875
dir = get_host_and_username(proxy, host, &user, port, HSC_DEFAULT_PORT, 1,
&pass);
#else
dir = get_host_and_username(proxy, host, &user, port, 21, 1,
&pass);
#endif
free(user);
if (pass)
wipe_password (pass);
if (dir)
free(dir);
}
static int
ftpfs_open_socket(struct connection *bucket)
{
struct sockaddr_in server_address;
struct hostent *hp;
int my_socket;
char *host;
int port;
int free_host = 0;
/* Use a proxy host? */
host = qhost(bucket);
if (!host || !*host){
print_vfs_message ("ftpfs: Invalid host name.");
my_errno = EINVAL;
return -1;
}
/* Hosts to connect to that start with a ! should use proxy */
if (qproxy(bucket)) {
ftpfs_get_proxy_host_and_port (ftpfs_proxy_host, &host, &port);
free_host = 1;
}
/* Get host address */
bzero ((char *) &server_address, sizeof (server_address));
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = inet_addr (host);
if (server_address.sin_addr.s_addr != -1)
server_address.sin_family = AF_INET;
else {
hp = gethostbyname(host);
if (hp == NULL){
print_vfs_message("ftpfs: Invalid host address.");
my_errno = EINVAL;
if (free_host)
free (host);
return -1;
}
server_address.sin_family = hp->h_addrtype;
/* We copy only 4 bytes, we can not trust hp->h_length, as it comes from the DNS */
bcopy ((char *) hp->h_addr, (char *) &server_address.sin_addr, 4);
}
#define THE_PORT qproxy(bucket) ? port : qport (bucket)
server_address.sin_port = htons (THE_PORT);
/* Connect */
if ((my_socket = socket (AF_INET, SOCK_STREAM, 0)) < 0) {
my_errno = errno;
if (free_host)
free (host);
return -1;
}
setup_source_route (my_socket, server_address.sin_addr.s_addr);
print_vfs_message("ftpfs: making connection to %s", host);
if (free_host)
free (host);
enable_interrupt_key(); /* clear the interrupt flag */
if (connect (my_socket, (struct sockaddr *) &server_address,
sizeof (server_address)) < 0){
my_errno = errno;
if (errno == EINTR && got_interrupt())
print_vfs_message("ftpfs: connection interrupted by user");
else
print_vfs_message("ftpfs: connection to server failed: %s",
unix_error_string(errno));
disable_interrupt_key();
close (my_socket);
return -1;
}
disable_interrupt_key();
return my_socket;
}
static struct connection *
open_command_connection (char *host, char *user, int port, char *netrcpass)
{
struct connection *bucket;
int retry_seconds, count_down;
bucket = xmalloc(sizeof(struct connection),
"struct connection");
if (bucket == NULL) ERRNOR (ENOMEM, NULL);
#ifdef HAVE_MAD
{
extern void *watch_free_pointer;
if (!watch_free_pointer)
watch_free_pointer = host;
}
#endif
qhost(bucket) = strdup (host);
quser(bucket) = strdup (user);
qcdir(bucket) = NULL;
qport(bucket) = port;
qlock(bucket) = 0;
qhome(bucket) = NULL;
qproxy(bucket)= 0;
qupdir(bucket)= 0;
qdcache(bucket)=0;
bucket->__inode_counter = 0;
bucket->lock = 0;
bucket->use_proxy = ftpfs_check_proxy (host);
bucket->password = 0;
bucket->use_passive_connection = ftpfs_use_passive_connections | source_route;
bucket->use_source_route = source_route;
bucket->strict_rfc959_list_cmd = !ftpfs_use_unix_list_options;
bucket->isbinary = TYPE_UNKNOWN;
/* We do not want to use the passive if we are using proxies */
if (bucket->use_proxy)
bucket->use_passive_connection = 0;
if ((qdcache(bucket) = linklist_init()) == NULL) {
my_errno = ENOMEM;
free (qhost(bucket));
free (quser(bucket));
free (bucket);
return NULL;
}
retry_seconds = 0;
do {
bucket->failed_on_login = 0;
qsock(bucket) = ftpfs_open_socket(bucket);
if (qsock(bucket) == -1) {
free_bucket (bucket);
return NULL;
}
if (login_server(bucket, netrcpass)) {
/* Logged in, no need to retry the connection */
break;
} else {
if (bucket->failed_on_login){
/* Close only the socket descriptor */
close (qsock (bucket));
} else {
connection_destructor (bucket);
return NULL;
}
if (ftpfs_retry_seconds){
retry_seconds = ftpfs_retry_seconds;
enable_interrupt_key ();
for (count_down = retry_seconds; count_down; count_down--){
print_vfs_message ("Waiting to retry... %d (Control-C to cancel)", count_down);
sleep (1);
if (got_interrupt ()){
/* my_errno = E; */
disable_interrupt_key ();
free_bucket (bucket);
return NULL;
}
}
disable_interrupt_key ();
}
}
} while (retry_seconds);
qhome(bucket) = ftpfs_get_current_directory (bucket);
if (!qhome(bucket))
qhome(bucket) = strdup ("/");
qupdir(bucket) = strdup ("/"); /* FIXME: I changed behavior to ignore last_current_dir */
return bucket;
}
static int
is_connection_closed(struct connection *bucket)
{
fd_set rset;
struct timeval t;
if (got_sigpipe){
return 1;
}
t.tv_sec = 0;
t.tv_usec = 0;
FD_ZERO(&rset);
FD_SET(qsock(bucket), &rset);
while (1) {
if (select(qsock(bucket) + 1, &rset, NULL, NULL, &t) < 0)
if (errno != EINTR)
return 1;
return 0;
#if 0
if (FD_ISSET(qsock(bucket), &rset)) {
n = read(qsock(bucket), &read_ahead, sizeof(read_ahead));
if (n <= 0)
return 1;
} else
#endif
}
}
/* This routine keeps track of open connections */
/* Returns a connected socket to host */
static struct connection *
open_link (char *host, char *user, int port, char *netrcpass)
{
int sock;
struct connection *bucket;
struct linklist *lptr;
for (lptr = connections_list->next;
lptr != connections_list; lptr = lptr->next) {
bucket = lptr->data;
if ((strcmp (host, qhost(bucket)) == 0) &&
(strcmp (user, quser(bucket)) == 0) &&
(port == qport(bucket))) {
/* check the connection is closed or not, just hack */
if (is_connection_closed(bucket)) {
flush_all_directory(bucket);
sock = ftpfs_open_socket(bucket);
if (sock != -1) {
close(qsock(bucket));
qsock(bucket) = sock;
if (login_server(bucket, netrcpass))
return bucket;
}
/* connection refused */
lptr->prev->next = lptr->next;
lptr->next->prev = lptr->prev;
connection_destructor(bucket);
return NULL;
}
return bucket;
}
}
bucket = open_command_connection(host, user, port, netrcpass);
if (bucket == NULL)
return NULL;
if (!linklist_insert(connections_list, bucket)) {
my_errno = ENOMEM;
connection_destructor(bucket);
return NULL;
}
return bucket;
}
/* The returned directory should always contain a trailing slash */
static char *ftpfs_get_current_directory(struct connection *bucket)
{
char buf[4096], *bufp, *bufq;
if (command(bucket, NONE, "PWD") == COMPLETE &&
get_reply(qsock(bucket), buf, sizeof(buf)) == COMPLETE) {
bufp = NULL;
for (bufq = buf; *bufq; bufq++)
if (*bufq == '"') {
if (!bufp) {
bufp = bufq + 1;
} else {
*bufq = 0;
if (*bufp) {
if (*(bufq - 1) != '/') {
*bufq++ = '/';
*bufq = 0;
}
return strdup (bufp);
} else ERRNOR (EIO, NULL);
}
}
}
my_errno = EIO;
return NULL;
}
/* Setup Passive ftp connection, we use it for source routed connections */
static int
setup_passive (int my_socket, struct connection *bucket, struct sockaddr_in *sa)
{
int xa, xb, xc, xd, xe, xf;
char n [6];
char *c = reply_str;
if (command (bucket, WAIT_REPLY | WANT_STRING, "PASV") != COMPLETE)
return 0;
/* Parse remote parameters */
for (c = reply_str + 4; (*c) && (!isdigit (*c)); c++)
;
if (!*c)
return 0;
if (!isdigit (*c))
return 0;
if (sscanf (c, "%d,%d,%d,%d,%d,%d", &xa, &xb, &xc, &xd, &xe, &xf) != 6)
return 0;
n [0] = (unsigned char) xa;
n [1] = (unsigned char) xb;
n [2] = (unsigned char) xc;
n [3] = (unsigned char) xd;
n [4] = (unsigned char) xe;
n [5] = (unsigned char) xf;
bcopy ((void *)n, &(sa->sin_addr.s_addr), 4);
bcopy ((void *)&n[4], &(sa->sin_port), 2);
setup_source_route (my_socket, sa->sin_addr.s_addr);
if (connect (my_socket, (struct sockaddr *) sa, sizeof (struct sockaddr_in)) < 0)
return 0;
return 1;
}
static int
initconn (struct connection *bucket)
{
struct sockaddr_in data_addr;
int data, len = sizeof(data_addr);
struct protoent *pe;
getsockname(qsock(bucket), (struct sockaddr *) &data_addr, &len);
data_addr.sin_port = 0;
pe = getprotobyname("tcp");
if (pe == NULL) ERRNOR (EIO, -1);
data = socket (AF_INET, SOCK_STREAM, pe->p_proto);
if (data < 0) ERRNOR (EIO, -1);
#ifdef ORIGINAL_CONNECT_CODE
if (bucket->use_source_route){
int c;
if ((c = setup_passive (data, bucket, &data_addr)))
return data;
print_vfs_message("ftpfs: could not setup passive mode for source routing");
bucket->use_source_route = 0;
}
#else
if (bucket->use_passive_connection){
if ((bucket->use_passive_connection = setup_passive (data, bucket, &data_addr)))
return data;
bucket->use_source_route = 0;
bucket->use_passive_connection = 0;
print_vfs_message ("ftpfs: could not setup passive mode");
}
#endif
/* If passive setup fails, fallback to active connections */
/* Active FTP connection */
if (bind (data, (struct sockaddr *)&data_addr, len) < 0)
goto error_return;
getsockname(data, (struct sockaddr *) &data_addr, &len);
if (listen (data, 1) < 0)
goto error_return;
{
unsigned char *a = (unsigned char *)&data_addr.sin_addr;
unsigned char *p = (unsigned char *)&data_addr.sin_port;
if (command (bucket, WAIT_REPLY, "PORT %d,%d,%d,%d,%d,%d", a[0], a[1],
a[2], a[3], p[0], p[1]) != COMPLETE)
goto error_return;
}
return data;
error_return:
close(data);
my_errno = EIO;
return -1;
}
static int
open_data_connection (struct connection *bucket, char *cmd, char *remote,
int isbinary)
{
struct sockaddr_in from;
int s, j, data, fromlen = sizeof(from);
if ((s = initconn (bucket)) == -1)
return -1;
if (changetype (bucket, isbinary) == -1)
return -1;
if (do_reget > 0){
j = command (bucket, WAIT_REPLY, "REST %d", do_reget);
do_reget = 0;
if (j != CONTINUE)
return -1;
}
if (remote)
j = command (bucket, WAIT_REPLY, "%s %s", cmd, remote);
else
j = command (bucket, WAIT_REPLY, "%s", cmd);
if (j != PRELIM) ERRNOR (EPERM, -1);
enable_interrupt_key();
if (bucket->use_passive_connection)
data = s;
else {
data = accept (s, (struct sockaddr *)&from, &fromlen);
if (data < 0) {
my_errno = errno;
close(s);
return -1;
}
close(s);
}
disable_interrupt_key();
return data;
}
static void
my_abort (struct connection *bucket, int dsock)
{
static unsigned char ipbuf[3] = { IAC, IP, IAC };
fd_set mask;
char buf[1024];
print_vfs_message("ftpfs: aborting transfer.");
if (send(qsock(bucket), ipbuf, sizeof(ipbuf), MSG_OOB) != sizeof(ipbuf)) {
print_vfs_message("ftpfs: abort error: %s", unix_error_string(errno));
return;
}
if (command(bucket, NONE, "%cABOR", DM) != COMPLETE){
print_vfs_message ("ftpfs: abort failed");
return;
}
if (dsock != -1) {
FD_ZERO(&mask);
FD_SET(dsock, &mask);
if (select(dsock + 1, &mask, NULL, NULL, NULL) > 0)
while (read(dsock, buf, sizeof(buf)) > 0);
}
if ((get_reply(qsock(bucket), NULL, 0) == TRANSIENT) && (code == 426))
get_reply(qsock(bucket), NULL, 0);
}
static void
resolve_symlink(struct connection *bucket, struct dir *dir)
{
struct linklist *flist;
struct direntry *fe, *fel;
char tmp[MC_MAXPATHLEN];
print_vfs_message("Resolving symlink...");
dir->symlink_status = FTPFS_RESOLVED_SYMLINKS;
for (flist = dir->file_list->next; flist != dir->file_list; flist = flist->next) {
/* flist->data->l_stat is alread initialized with 0 */
fel = flist->data;
if (S_ISLNK(fel->s.st_mode)) {
if (fel->linkname[0] == '/') {
if (strlen (fel->linkname) >= MC_MAXPATHLEN)
continue;
strcpy (tmp, fel->linkname);
} else {
if ((strlen (dir->remote_path) + strlen (fel->linkname)) >= MC_MAXPATHLEN)
continue;
strcpy (tmp, dir->remote_path);
if (tmp[1] != '\0')
strcat (tmp, "/");
strcat (tmp + 1, fel->linkname);
}
for ( ;; ) {
fe = _get_file_entry(bucket, tmp, 0, 0);
if (fe) {
if (S_ISLNK (fe->s.st_mode) && fe->l_stat == 0) {
/* Symlink points to link which isn't resolved, yet. */
if (fe->linkname[0] == '/') {
if (strlen (fe->linkname) >= MC_MAXPATHLEN)
break;
strcpy (tmp, fe->linkname);
} else {
/* at this point tmp looks always like this
/directory/filename, i.e. no need to check
strrchr's return value */
*(strrchr (tmp, '/') + 1) = '\0'; /* dirname */
if ((strlen (tmp) + strlen (fe->linkname)) >= MC_MAXPATHLEN)
break;
strcat (tmp, fe->linkname);
}
continue;
} else {
fel->l_stat = xmalloc(sizeof(struct stat),
"resolve_symlink: struct stat");
if ( S_ISLNK (fe->s.st_mode))
*fel->l_stat = *fe->l_stat;
else
*fel->l_stat = fe->s;
(*fel->l_stat).st_ino = bucket->__inode_counter++;
}
}
break;
}
}
}
}
#define X "ftp"
#define X_myname "/#ftp:"
#define X_vfs_ops ftpfs_vfs_ops
#define X_fill_names ftpfs_fill_names
#define X_hint_reread ftpfs_hint_reread
#define X_flushdir ftpfs_flushdir
#define X_done ftpfs_done
#include "shared_ftp_fish.c"
static char*
get_path (struct connection **bucket, char *path)
{
return s_get_path (bucket, path, "/#ftp:");
}
static struct dir *
retrieve_dir(struct connection *bucket, char *remote_path, int resolve_symlinks)
{
#ifdef OLD_READ
FILE *fp;
#endif
int sock, has_symlinks;
struct linklist *file_list, *p;
struct direntry *fe;
char buffer[8192];
struct dir *dcache;
int got_intr = 0;
int has_spaces = (strchr (remote_path, ' ') != NULL);
canonicalize_pathname (remote_path);
for (p = qdcache(bucket)->next;p != qdcache(bucket);
p = p->next) {
dcache = p->data;
if (strcmp(dcache->remote_path, remote_path) == 0) {
struct timeval tim;
gettimeofday(&tim, NULL);
if ((tim.tv_sec < dcache->timestamp.tv_sec) && !force_expiration) {
if (resolve_symlinks && dcache->symlink_status == FTPFS_UNRESOLVED_SYMLINKS)
resolve_symlink(bucket, dcache);
return dcache;
} else {
force_expiration = 0;
p->next->prev = p->prev;
p->prev->next = p->next;
dir_destructor(dcache);
free (p);
break;
}
}
}
has_symlinks = 0;
if (bucket->strict_rfc959_list_cmd)
print_vfs_message("ftpfs: Reading FTP directory... (don't use UNIX ls options)");
else
print_vfs_message("ftpfs: Reading FTP directory...");
if (has_spaces || bucket->strict_rfc959_list_cmd)
if (__ftpfs_chdir(bucket, remote_path) != COMPLETE) {
my_errno = ENOENT;
print_vfs_message("ftpfs: CWD failed.");
return NULL;
}
file_list = linklist_init();
if (file_list == NULL) ERRNOR (ENOMEM, NULL);
dcache = xmalloc(sizeof(struct dir),
"struct dir");
if (dcache == NULL) {
my_errno = ENOMEM;
linklist_destroy(file_list, NULL);
print_vfs_message("ftpfs: FAIL");
return NULL;
}
gettimeofday(&dcache->timestamp, NULL);
dcache->timestamp.tv_sec += ftpfs_directory_timeout;
dcache->file_list = file_list;
dcache->remote_path = strdup(remote_path);
dcache->count = 1;
dcache->symlink_status = FTPFS_NO_SYMLINKS;
if (bucket->strict_rfc959_list_cmd == 1)
sock = open_data_connection (bucket, "LIST", 0, TYPE_ASCII);
else if (has_spaces)
sock = open_data_connection (bucket, "LIST -la", ".", TYPE_ASCII);
else {
char *path = copy_strings (remote_path, PATH_SEP_STR, ".", (char *) 0);
sock = open_data_connection (bucket, "LIST -la", path, TYPE_ASCII);
free (path);
}
if (sock == -1)
goto error_3;
#ifdef OLD_READ
#define close_this_sock(x,y) fclose (x)
fp = fdopen(sock, "r");
if (fp == NULL) {
my_errno = errno;
close(sock);
goto error_2;
}
#else
#define close_this_sock(x,y) close (y)
#endif
/* Clear the interrupt flag */
enable_interrupt_key ();
errno = 0;
#ifdef OLD_READ
while (fgets (buffer, sizeof (buffer), fp) != NULL) {
if (got_intr = got_interrupt ())
break;
#else
while ((got_intr = get_line_interruptible (buffer, sizeof (buffer), sock)) != EINTR){
#endif
int eof = got_intr == 0;
if (logfile){
fputs (buffer, logfile);
fputs ("\n", logfile);
fflush (logfile);
}
if (buffer [0] == 0 && eof)
break;
fe = xmalloc(sizeof(struct direntry), "struct direntry");
fe->freshly_created = 0;
fe->tmp_reget = 0;
fe->local_filename = NULL;
if (fe == NULL) {
my_errno = ENOMEM;
goto error_1;
}
if (parse_ls_lga (buffer, &fe->s, &fe->name, &fe->linkname)) {
fe->count = 1;
fe->local_filename = fe->remote_filename = NULL;
fe->l_stat = NULL;
fe->bucket = bucket;
(fe->s).st_ino = bucket->__inode_counter++;
if (S_ISLNK(fe->s.st_mode))
has_symlinks = 1;
if (!linklist_insert(file_list, fe)) {
free(fe);
my_errno = ENOMEM;
goto error_1;
}
}
else
free(fe);
if (eof)
break;
}
if (got_intr){
disable_interrupt_key();
print_vfs_message("ftpfs: reading FTP directory interrupt by user");
#ifdef OLD_READ
my_abort(bucket, fileno(fp));
#else
my_abort(bucket, sock);
#endif
close_this_sock(fp, sock);
my_errno = EINTR;
goto error_3;
}
close_this_sock(fp, sock);
disable_interrupt_key();
if (get_reply (qsock (bucket), NULL, 0) != COMPLETE) {
my_errno = EIO;
goto error_3;
}
if (file_list->next == file_list) {
if (bucket->__inode_counter == 0 && !bucket->strict_rfc959_list_cmd) {
/* It's our first attempt to get a directory listing from this
server (UNIX style LIST command) */
bucket->strict_rfc959_list_cmd = 1;
free(dcache->remote_path);
free(dcache);
linklist_destroy(file_list, direntry_destructor);
return retrieve_dir (bucket, remote_path, resolve_symlinks);
}
my_errno = EACCES;
goto error_3;
}
if (!linklist_insert(qdcache(bucket), dcache)) {
my_errno = ENOMEM;
goto error_3;
}
if (has_symlinks) {
if (resolve_symlinks)
resolve_symlink(bucket, dcache);
else
dcache->symlink_status = FTPFS_UNRESOLVED_SYMLINKS;
}
print_vfs_message("ftpfs: got listing");
return dcache;
error_1:
disable_interrupt_key();
close_this_sock(fp, sock);
#ifdef OLD_READ
error_2:
#endif
get_reply(qsock(bucket), NULL, 0);
error_3:
free(dcache->remote_path);
free(dcache);
linklist_destroy(file_list, direntry_destructor);
print_vfs_message("ftpfs: failed");
return NULL;
}
static int
store_file(struct direntry *fe)
{
int local_handle, sock, n, total;
#ifdef HAVE_STRUCT_LINGER
struct linger li;
#else
int flag_one = 1;
#endif
char buffer[8192];
struct stat s;
local_handle = open(fe->local_filename, O_RDONLY);
unlink (fe->local_filename);
if (local_handle == -1) ERRNOR (EIO, 0);
fstat(local_handle, &s);
sock = open_data_connection(fe->bucket, "STOR", fe->remote_filename, TYPE_BINARY);
if (sock < 0) {
close(local_handle);
return 0;
}
#ifdef HAVE_STRUCT_LINGER
li.l_onoff = 1;
li.l_linger = 120;
setsockopt(sock, SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(li));
#else
setsockopt(sock, SOL_SOCKET, SO_LINGER, &flag_one, sizeof (flag_one));
#endif
total = 0;
enable_interrupt_key();
while (1) {
while ((n = read(local_handle, buffer, sizeof(buffer))) < 0) {
if (errno == EINTR) {
if (got_interrupt()) {
my_errno = EINTR;
goto error_return;
}
else
continue;
}
my_errno = errno;
goto error_return;
}
if (n == 0)
break;
while (write(sock, buffer, n) < 0) {
if (errno == EINTR) {
if (got_interrupt()) {
my_errno = EINTR;
goto error_return;
}
else
continue;
}
my_errno = errno;
goto error_return;
}
total += n;
print_vfs_message("ftpfs: storing file %d (%d)",
total, s.st_size);
}
disable_interrupt_key();
close(sock);
close(local_handle);
if (get_reply (qsock (fe->bucket), NULL, 0) != COMPLETE) ERRNOR (EIO, 0);
return 1;
error_return:
disable_interrupt_key();
close(sock);
close(local_handle);
get_reply(qsock(fe->bucket), NULL, 0);
return 0;
}
static int
linear_start(struct direntry *fe)
{
fe->local_stat.st_mtime = 0;
fe->data_sock = open_data_connection(fe->bucket, "RETR", fe->remote_filename, TYPE_BINARY);
if (fe->data_sock == -1)
ERRNOR (EACCES, 0);
return 1;
}
static int
linear_abort (struct direntry *fe)
{
my_abort(fe->bucket, fe->data_sock);
fe->data_sock = -1;
}
static int
linear_read (struct direntry *fe, void *buf, int len)
{
int n;
while ((n = read (fe->data_sock, buf, len))<0) {
if ((errno == EINTR) && !got_interrupt())
continue;
break;
}
if (n<0) linear_abort(fe);
if (!n) {
if ((get_reply (qsock (fe->bucket), NULL, 0) != COMPLETE)) {
my_errno = EIO;
n=-1;
}
fe->data_sock = -1;
}
ERRNOR (errno, n);
}
static int
linear_close (struct direntry *fe)
{
if (fe->data_sock != -1)
linear_abort(fe);
}
int ftpfs_ctl (void *data, int ctlop, int arg)
{
int n = 0;
struct filp *fp = data;
int v;
switch (ctlop) {
case MCCTL_IS_NOTREADY:
{
int v = select_on_two (fp->fe->data_sock, 0);
if (((v < 0) && (errno == EINTR)) || v == 0)
return 1;
return 0;
}
default:
return 0;
}
}
static int
send_ftp_command(char *filename, char *cmd, int flags)
{
char *remote_path;
struct connection *bucket;
int r;
int flush_directory_cache = (flags & OPT_FLUSH) && (normal_flush > 0);
if (!(remote_path = get_path(&bucket, filename)))
return -1;
r = command (bucket, WAIT_REPLY, cmd, remote_path);
free(remote_path);
vfs_add_noncurrent_stamps (&ftpfs_vfs_ops, (vfsid) bucket, NULL);
if (flags & OPT_IGNORE_ERROR)
r = COMPLETE;
if (r != COMPLETE) ERRNOR (EPERM, -1);
if (flush_directory_cache)
flush_all_directory(bucket);
return 0;
}
/* This routine is called as the last step in load_setup */
void
ftpfs_init_passwd(void)
{
struct passwd *passwd_info;
char *p, hostname[MAXHOSTNAMELEN];
struct hostent *hp;
ftpfs_anonymous_passwd = load_anon_passwd ();
if (ftpfs_anonymous_passwd)
return;
if ((passwd_info = getpwuid (geteuid ())) == NULL)
p = "guest";
else
p = passwd_info->pw_name;
gethostname(hostname, sizeof(hostname));
hp = gethostbyname(hostname);
if (hp != NULL)
ftpfs_anonymous_passwd = copy_strings (p, "@", hp->h_name, NULL);
else
ftpfs_anonymous_passwd = copy_strings (p, "@", hostname, NULL);
endpwent ();
}
void
ftpfs_init ()
{
connections_list = linklist_init();
ftpfs_directory_timeout = FTPFS_DIRECTORY_TIMEOUT;
}
int ftpfs_chmod (char *path, int mode)
{
char buf[40];
sprintf(buf, "SITE CHMOD %4.4o %%s", mode & 07777);
return send_ftp_command(path, buf, OPT_IGNORE_ERROR | OPT_FLUSH);
}
int ftpfs_chown (char *path, int owner, int group)
{
#if 0
my_errno = EPERM;
return -1;
#else
/* Everyone knows it is not possible to chown remotely, so why bother them.
If someone's root, then copy/move will always try to chown it... */
return 0;
#endif
}
static int ftpfs_unlink (char *path)
{
return send_ftp_command(path, "DELE %s", OPT_FLUSH);
}
/* Return true if path is the same directoy as the one we are on now */
static int
is_same_dir (char *path, struct connection *bucket)
{
if (!qcdir (bucket))
return 0;
if (strcmp (path, qcdir (bucket)) == 0)
return 1;
return 0;
}
static int
__ftpfs_chdir (struct connection *bucket ,char *remote_path)
{
int r;
if (!bucket->cwd_defered && is_same_dir (remote_path, bucket))
return COMPLETE;
r = command (bucket, WAIT_REPLY, "CWD %s", remote_path);
if (r != COMPLETE) {
my_errno = EIO;
} else {
if (qcdir(bucket))
free(qcdir(bucket));
qcdir(bucket) = strdup (remote_path);
bucket->cwd_defered = 0;
}
return r;
}
static int ftpfs_rename (char *path1, char *path2)
{
send_ftp_command(path1, "RNFR %s", OPT_FLUSH);
return send_ftp_command(path2, "RNTO %s", OPT_FLUSH);
}
static int ftpfs_mkdir (char *path, mode_t mode)
{
return send_ftp_command(path, "MKD %s", OPT_FLUSH);
}
static int ftpfs_rmdir (char *path)
{
return send_ftp_command(path, "RMD %s", OPT_FLUSH);
}
void ftpfs_set_debug (char *file)
{
logfile = fopen (file, "w+");
}
void ftpfs_forget (char *file)
{
struct linklist *l;
char *host, *user, *pass, *rp;
int port;
#ifndef BROKEN_PATHS
if (strncmp (file, "/#ftp:", 6))
return; /* Normal: consider cd /bla/#ftp */
#else
if (!(file = strstr (file, "/#ftp:")))
return;
#endif
file += 6;
if (!(rp = my_get_host_and_username (file, &host, &user, &port, &pass))) {
free (host);
free (user);
if (pass)
wipe_password (pass);
return;
}
/* we do not care about the path actually */
free (rp);
for (l = connections_list->next; l != connections_list; l = l->next){
struct connection *bucket = l->data;
if ((strcmp (host, qhost (bucket)) == 0) &&
(strcmp (user, quser (bucket)) == 0) &&
(port == qport (bucket))){
/* close socket: the child owns it now */
close (bucket->sock);
bucket->sock = -1;
/* reopen the connection */
bucket->sock = ftpfs_open_socket (bucket);
if (bucket->sock != -1)
login_server (bucket, pass);
break;
}
}
free (host);
free (user);
if (pass)
wipe_password (pass);
}
vfs ftpfs_vfs_ops = {
s_open,
s_close,
s_read,
s_write,
s_opendir,
s_readdir,
s_closedir,
s_telldir,
s_seekdir,
s_stat,
s_lstat,
s_fstat,
ftpfs_chmod,
ftpfs_chown, /* not really implemented but returns success */
NULL,
s_readlink,
NULL,
NULL,
ftpfs_unlink,
ftpfs_rename,
s_chdir,
s_errno,
s_lseek,
NULL,
s_getid,
s_nothingisopen,
s_free,
s_getlocalcopy,
s_ungetlocalcopy,
ftpfs_mkdir,
ftpfs_rmdir,
ftpfs_ctl,
s_setctl,
ftpfs_forget
#ifdef HAVE_MMAP
, NULL,
NULL
#endif
};
#ifdef USE_NETRC
static char buffer[100];
static char *netrc, *netrcp;
static int netrc_next (void)
{
char *p;
int i;
static char *keywords [] = { "default", "machine",
"login", "password", "passwd",
"account", "macdef" };
while (1) {
netrcp = skip_separators (netrcp);
if (*netrcp != '\n')
break;
netrcp++;
}
if (!*netrcp)
return 0;
p = buffer;
if (*netrcp == '"') {
for (;*netrcp != '"' && *netrcp; netrcp++) {
if (*netrcp == '\\')
netrcp++;
*p++ = *netrcp;
}
} else {
for (;*netrcp != '\n' && *netrcp != '\t' && *netrcp != ' ' &&
*netrcp != ',' && *netrcp; netrcp++) {
if (*netrcp == '\\')
netrcp++;
*p++ = *netrcp;
}
}
*p = 0;
if (!*buffer)
return 0;
for (i = 0; i < sizeof (keywords) / sizeof (keywords [0]); i++)
if (!strcmp (keywords [i], buffer))
break;
return i + 1;
}
int lookup_netrc (char *host, char **login, char **pass)
{
char *netrcname, *tmp;
char hostname[MAXHOSTNAMELEN], *domain;
int keyword;
struct stat mystat;
static int be_angry = 1;
static struct rupcache {
struct rupcache *next;
char *host;
char *login;
char *pass;
} *rup_cache = NULL, *rupp;
for (rupp = rup_cache; rupp != NULL; rupp = rupp->next)
if (!strcmp (host, rupp->host)) {
if (rupp->login != NULL)
*login = strdup (rupp->login);
if (rupp->pass != NULL)
*pass = strdup (rupp->pass);
return 0;
}
netrcname = xmalloc (strlen (home_dir) + strlen ("/.netrc") + 1, "netrc");
strcpy (netrcname, home_dir);
strcat (netrcname, "/.netrc");
netrcp = netrc = load_file (netrcname);
if (netrc == NULL) {
free (netrcname);
return 0;
}
if (gethostname (hostname, sizeof (hostname)) < 0)
*hostname = 0;
if (!(domain = strchr (hostname, '.')))
domain = "";
while ((keyword = netrc_next ())) {
if (keyword == 2) {
if (netrc_next () != 8)
continue;
if (strcasecmp (host, buffer) &&
((tmp = strchr (host, '.')) == NULL ||
strcasecmp (tmp, domain) ||
strncasecmp (host, buffer, tmp - host) ||
buffer [tmp - host]))
continue;
} else if (keyword != 1)
continue;
while ((keyword = netrc_next ()) > 2) {
switch (keyword) {
case 3:
if (netrc_next ())
if (*login == NULL)
*login = strdup (buffer);
else if (strcmp (*login, buffer))
keyword = 20;
break;
case 4:
case 5:
if (strcmp (*login, "anonymous") && strcmp (*login, "ftp") &&
stat (netrcname, &mystat) >= 0 &&
(mystat.st_mode & 077)) {
if (be_angry) {
message_1s (1, MSG_ERROR, _("~/.netrc file has not correct mode.\n"
"Remove password or correct mode."));
be_angry = 0;
}
free (netrc);
free (netrcname);
return -1;
}
if (netrc_next () && *pass == NULL)
*pass = strdup (buffer);
break;
case 6:
if (stat (netrcname, &mystat) >= 0 &&
(mystat.st_mode & 077)) {
if (be_angry) {
message_1s (1, MSG_ERROR, _("~/.netrc file has not correct mode.\n"
"Remove password or correct mode."));
be_angry = 0;
}
free (netrc);
free (netrcname);
return -1;
}
netrc_next ();
break;
case 7:
for (;;) {
while (*netrcp != '\n' && *netrcp);
if (*netrcp != '\n')
break;
netrcp++;
if (*netrcp == '\n' || !*netrcp)
break;
}
break;
}
if (keyword == 20)
break;
}
if (keyword == 20)
continue;
else
break;
}
rupp = (struct rupcache *) xmalloc (sizeof (struct rupcache), "");
rupp->host = strdup (host);
rupp->login = rupp->pass = 0;
if (*login != NULL)
rupp->login = strdup (*login);
if (*pass != NULL)
rupp->pass = strdup (*pass);
rupp->next = rup_cache;
rup_cache = rupp;
free (netrc);
free (netrcname);
return 0;
}
#ifndef HAVE_STRNCASECMP
int strncasecmp (char *s, char *d, int l)
{
int result;
while (l--){
if (result = (0x20 | *s) - (0x20 | *d))
break;
if (!*s)
return 0;
s++;
d++;
}
}
#endif
#endif /* USE_NETRC */
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