mc/vfs/smbfs.c

/* Virtual File System: Midnight Commander file system.

   Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
   Free Software Foundation, Inc.

   Written by Wayne Roberts <wroberts1@home.com>, 1997
	      Andrew V. Samoilov <sav@bcs.zp.ua> 2002, 2003

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library 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 Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/* Namespace: exports init_smbfs, smbfs_set_debug(), smbfs_set_debugf() */
#include <config.h>
#include <stdio.h>
#include <sys/types.h>

#undef	USE_NCURSES	/* Don't include *curses.h */
#include "../src/global.h"
#include "../src/tty.h"		/* enable/disable interrupt key */
#include "../src/wtools.h"	/* message() */
#include "../src/main.h"	/* print_vfs_message */
#include "utilvfs.h"

#undef	PACKAGE_BUGREPORT
#undef	PACKAGE_NAME
#undef	PACKAGE_STRING
#undef	PACKAGE_TARNAME
#undef	PACKAGE_VERSION

#include "samba/include/config.h"
/* don't load crap in "samba/include/includes.h" we don't use and which 
   conflicts with definitions in other includes */
#undef HAVE_LIBREADLINE
#define NO_CONFIG_H
#undef	VERSION

#include "samba/include/includes.h"

#include <string.h>

#include "vfs.h"
#include "vfs-impl.h"
#include "smbfs.h"

#define SMBFS_MAX_CONNECTIONS 16
static const char * const IPC = "IPC$";
static const char * const URL_HEADER = "/#smb:";
#define HEADER_LEN	6

static int my_errno;
static uint32 err;

/* stuff that is same with each connection */
extern int DEBUGLEVEL;
extern pstring myhostname;
extern struct in_addr ipzero;
static mode_t myumask = 0755;
extern pstring global_myname;
static int smbfs_open_connections = 0;
static gboolean got_user = FALSE;
static gboolean got_pass = FALSE;
static pstring password;
static pstring username;
static struct vfs_class vfs_smbfs_ops;

static struct _smbfs_connection {
	struct cli_state *cli;
	struct in_addr dest_ip;
	BOOL have_ip;
	char *host;			/* server name */
	char *service;			/* share name */
	char *domain;
	char *user;
	char *home;
	char *password;
	int port;
	int name_type;
	time_t	last_use;
} smbfs_connections [SMBFS_MAX_CONNECTIONS];
/* unique to each connection */

/* modifies *share */
static struct cli_state * smbfs_do_connect (const char *server, char *share);

typedef struct _smbfs_connection smbfs_connection;
static smbfs_connection *current_bucket;

typedef struct {
	struct cli_state *cli;
	int fnum;
	off_t nread;
	uint16 attr;
} smbfs_handle;

static GSList *auth_list;

/* this function allows you to write:
 * char *s = g_strdup("hello, world");
 * s = free_after(g_strconcat(s, s, (char *)0), s);
 */
static inline char *
free_after (char *result, char *string_to_free)
{
	g_free(string_to_free);
	return result;
}


static void 
smbfs_auth_free (struct smb_authinfo const *a)
{
    g_free (a->host);
    g_free (a->share);
    g_free (a->domain);
    g_free (a->user);
    wipe_password (a->password);
}

static void
smbfs_auth_free_all (void)
{
    if (auth_list) {
        g_slist_foreach (auth_list, (GFunc)smbfs_auth_free, 0);
        g_slist_free (auth_list);
        auth_list = 0;
    }
}

static gint
smbfs_auth_cmp_host_and_share (gconstpointer _a, gconstpointer _b)
{
    struct smb_authinfo const *a = (struct smb_authinfo const *)_a;
    struct smb_authinfo const *b = (struct smb_authinfo const *)_b;

    if (!a->host || !a->share || !b->host || !b->share)
        return 1;
    if (strcmp (a->host, b->host) != 0)
        return 1;
    if (strcmp (a->share, b->share) != 0)
        return 1;
    return 0;
}

static gint
smbfs_auth_cmp_host (gconstpointer _a, gconstpointer _b)
{
    struct smb_authinfo const *a = (struct smb_authinfo const *)_a;
    struct smb_authinfo const *b = (struct smb_authinfo const *)_b;

    if (!a->host || !b->host)
        return 1;
    if (strcmp (a->host, b->host) != 0)
        return 1;
    if (strcmp (a->share, IPC) != 0)
        return 1;
    return 0;
}

static void
smbfs_auth_add (const char *host, const char *share, const char *domain,
              const char *user, const char *password)
{
    struct smb_authinfo *auth = g_new (struct smb_authinfo, 1);
    
    if (!auth)
        return;

    /* Don't check for NULL, g_strdup already does. */
    auth->host = g_strdup (host);
    auth->share = g_strdup (share);
    auth->domain = g_strdup (domain);
    auth->user = g_strdup (user);
    auth->password = g_strdup (password);
    auth_list = g_slist_prepend (auth_list, auth);
}

static void
smbfs_auth_remove (const char *host, const char *share)
{
    struct smb_authinfo data;
    struct smb_authinfo *auth;
    GSList *list;

    data.host = g_strdup (host);
    data.share = g_strdup (share);
    list = g_slist_find_custom (auth_list, 
                                &data, 
                                smbfs_auth_cmp_host_and_share);
    g_free (data.host);
    g_free (data.share);
    if (!list)
        return;
    auth = list->data;
    auth_list = g_slist_remove (auth_list, auth);
    smbfs_auth_free (auth);
}

/* Set authentication information in bucket. Return 1 if successful, else 0 */
/* Information in auth_list overrides user if pass is NULL. */
/* bucket->host and bucket->service must be valid. */
static int
smbfs_bucket_set_authinfo (smbfs_connection *bucket, 
        const char *domain, const char *user, const char *pass,
        int fallback_to_host)
{
    struct smb_authinfo data;
    struct smb_authinfo *auth;
    GSList *list;

    if (domain && user && pass) {
        g_free (bucket->domain);
        g_free (bucket->user);
        g_free (bucket->password);
        bucket->domain = g_strdup (domain);
        bucket->user = g_strdup (user);
        bucket->password = g_strdup (pass);
        smbfs_auth_remove (bucket->host, bucket->service);
        smbfs_auth_add (bucket->host, bucket->service,
                  domain, user, pass);
        return 1;
    }

    data.host = bucket->host;
    data.share = bucket->service;
    list = g_slist_find_custom (auth_list, &data, smbfs_auth_cmp_host_and_share);
    if (!list && fallback_to_host)
        list = g_slist_find_custom (auth_list, &data, smbfs_auth_cmp_host);
    if (list) {
        auth = list->data;
        bucket->domain = g_strdup (auth->domain);
        bucket->user = g_strdup (auth->user);
        bucket->password = g_strdup (auth->password);
        return 1;
    }

    if (got_pass) {
        bucket->domain = g_strdup (lp_workgroup ());
        bucket->user = g_strdup (got_user ? username : user);
        bucket->password = g_strdup (password);
        return 1;
    }

    auth = vfs_smb_get_authinfo (bucket->host, 
				 bucket->service,
				 (domain ? domain : lp_workgroup ()),
				 user);
    if (auth) {
        g_free (bucket->domain);
        g_free (bucket->user);
        g_free (bucket->password);
        bucket->domain = g_strdup (auth->domain);
        bucket->user = g_strdup (auth->user);
        bucket->password = g_strdup (auth->password);
        smbfs_auth_remove (bucket->host, bucket->service);
        auth_list = g_slist_prepend (auth_list, auth);
        return 1;
    }
    return 0;
}

void
smbfs_set_debug (int arg)
{
    DEBUGLEVEL = arg;
}

void
smbfs_set_debugf (const char *filename)
{
    extern pstring debugf;
    extern FILE *dbf;
    if (DEBUGLEVEL > 0) {
	FILE *outfile = fopen (filename, "w");
	if (outfile) {
	    setup_logging ("", True);	/* No needs for timestamp for each message */
	    dbf = outfile;
	    setbuf (dbf, NULL);
	    pstrcpy (debugf, filename);
	}
    }
}

/********************** The callbacks ******************************/
static int
smbfs_init (struct vfs_class * me)
{
    const char *servicesf = CONFIGDIR PATH_SEP_STR "smb.conf";

    /*  DEBUGLEVEL = 4; */

    TimeInit ();
    charset_initialise ();

    DEBUG (3, ("smbfs_init(%s)\n", me->name));

    if (!get_myname (myhostname, NULL))
	DEBUG (0, ("Failed to get my hostname.\n"));

    if (!lp_load (servicesf, True, False, False))
	DEBUG (0, ("Cannot load %s - run testparm to debug it\n", servicesf));

    codepage_initialise (lp_client_code_page ());

    load_interfaces ();

    myumask = umask (0);
    umask (myumask);
    myumask = ~myumask;

    if (getenv ("USER")) {
	char *p;

	pstrcpy (username, getenv ("USER"));
	got_user = TRUE;
	DEBUG (3, ("smbfs_init(): $USER:%s\n", username));
	if ((p = strchr (username, '%'))) {
	    *p = 0;
	    pstrcpy (password, p + 1);
	    got_pass = TRUE;
	    memset (strchr (getenv ("USER"), '%') + 1, 'X', strlen (password));
	    DEBUG (3, ("smbfs_init(): $USER%%pass: %s%%%s\n",
		       username, password));
	}
	strupper (username);
    }
    if (getenv ("PASSWD")) {
	pstrcpy (password, getenv ("PASSWD"));
	got_pass = TRUE;
    }
    return 1;
}

static void
smbfs_fill_names (struct vfs_class *me, fill_names_f func)
{
    int i;
    char *path;

    (void) me;

    for (i = 0; i < SMBFS_MAX_CONNECTIONS; i++) {
	if (smbfs_connections [i].cli) {
	    path = g_strconcat (URL_HEADER,
		smbfs_connections[i].user, "@",
		smbfs_connections[i].host,
		"/", smbfs_connections[i].service,
		NULL);
	    (*func)(path);
	    g_free (path);
	}
    }
}

#define CNV_LANG(s) dos_to_unix(s,False)
#define GNAL_VNC(s) unix_to_dos(s,False)
/* does same as do_get() in client.c */
/* called from vfs.c:1080, count = buffer size */
static int
smbfs_read (void *data, char *buffer, int count)
{
    smbfs_handle *info = (smbfs_handle *) data;
	int n;

	DEBUG(3, ("smbfs_read(fnum:%d, nread:%d, count:%d)\n",
		info->fnum, (int)info->nread, count));
	n = cli_read(info->cli, info->fnum, buffer, info->nread, count);
	if (n > 0)
		info->nread += n;
	return n;
}

static int
smbfs_write (void *data, const char *buf, int nbyte)
{
    smbfs_handle *info = (smbfs_handle *) data;
	int n;

	DEBUG(3, ("smbfs_write(fnum:%d, nread:%d, nbyte:%d)\n",
		info->fnum, (int)info->nread, nbyte));
	n = cli_write(info->cli, info->fnum, 0, buf, info->nread, nbyte);
	if (n > 0)
		info->nread += n;
    return n;
}

static int
smbfs_close (void *data)
{
    smbfs_handle *info = (smbfs_handle *) data;
    DEBUG (3, ("smbfs_close(fnum:%d)\n", info->fnum));

    /* FIXME: Why too different cli have the same outbuf
     * if file is copied to share
     */
    if (info->cli->outbuf == NULL) {
	my_errno = EINVAL;
	return -1;
    }
#if 0
    /* if imlementing archive_level:    add rname to smbfs_handle */
    if (archive_level >= 2 && (inf->attr & aARCH)) {
	cli_setatr (info->cli, rname, info->attr & ~(uint16) aARCH, 0);
    }
#endif
    return (cli_close (info->cli, info->fnum) == True) ? 0 : -1;
}

static int
smbfs_errno (struct vfs_class *me)
{
    (void) me;

    DEBUG(3, ("smbfs_errno: %s\n", g_strerror(my_errno)));
    return my_errno;
}

typedef struct dir_entry {
    char *text;
    struct dir_entry *next;
    struct stat my_stat;
    int    merrno;
} dir_entry;

typedef struct {
    gboolean server_list;
    char *dirname;
    char *path;			/* the dir originally passed to smbfs_opendir */
    smbfs_connection *conn;
    dir_entry *entries;
    dir_entry *current;
} opendir_info;

static opendir_info
	*previous_info,
	*current_info,
	*current_share_info,
	*current_server_info;

static gboolean first_direntry;

static dir_entry *
smbfs_new_dir_entry (const char *name)
{
    static int inode_counter;
    dir_entry *new_entry;
    new_entry = g_new0 (dir_entry, 1);
    new_entry->text = dos_to_unix (g_strdup (name), 1);

    if (first_direntry) {
	current_info->entries = new_entry;
	first_direntry = FALSE;
    } else {
	current_info->current->next = new_entry;
    }
    current_info->current = new_entry;
    new_entry->my_stat.st_ino = inode_counter++;

    return new_entry;
}

/* browse for shares on server */
static void
smbfs_browsing_helper (const char *name, uint32 type, const char *comment, void *state)
{
    const char *typestr = "";
    dir_entry *new_entry = smbfs_new_dir_entry (name);

    (void) state;

    switch (type) {
    case STYPE_DISKTREE:
	typestr = "Disk";
	/*      show this as dir        */
	new_entry->my_stat.st_mode =
	    (S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP |
	     S_IXOTH) & myumask;
	break;
    case STYPE_PRINTQ:
	typestr = "Printer";
	break;
    case STYPE_DEVICE:
	typestr = "Device";
	break;
    case STYPE_IPC:
	typestr = "IPC";
	break;
    }
    DEBUG (3, ("\t%-15.15s%-10.10s%s\n", name, typestr, comment));
}

static void
smbfs_loaddir_helper (file_info * finfo, const char *mask, void *entry)
{
    dir_entry *new_entry = (dir_entry *) entry;
    time_t t = finfo->mtime;	/* the time is assumed to be passed as GMT */

    (void) mask;

#if 0				/* I want to see dot files */
    if (finfo->mode & aHIDDEN)
	return;			/* don't bother with hidden files, "~$" screws up mc */
#endif
    if (!entry)
	new_entry = smbfs_new_dir_entry (finfo->name);

    new_entry->my_stat.st_size = finfo->size;
    new_entry->my_stat.st_mtime = finfo->mtime;
    new_entry->my_stat.st_atime = finfo->atime;
    new_entry->my_stat.st_ctime = finfo->ctime;
    new_entry->my_stat.st_uid = finfo->uid;
    new_entry->my_stat.st_gid = finfo->gid;

    new_entry->my_stat.st_mode =	/*  rw-rw-rw */
	S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH;

/*  if (finfo->mode & aVOLID);	 nothing similar in real world */
    if (finfo->mode & aDIR)
	new_entry->my_stat.st_mode |=	/* drwxrwxrwx */
	    S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
    else
	new_entry->my_stat.st_mode |= S_IFREG;	/* if not dir, regular file? */
/*  if (finfo->mode & aARCH);	DOS archive	*/
/*  if (finfo->mode & aHIDDEN);	like a dot file? */
/*  if (finfo->mode & aSYSTEM); like a kernel? */
    if (finfo->mode & aRONLY)
	new_entry->my_stat.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
    new_entry->my_stat.st_mode &= myumask;

    DEBUG (entry ? 3 : 6, ("  %-30s%7.7s%8.0f  %s",
			   CNV_LANG (finfo->name),
			   attrib_string (finfo->mode),
			   (double) finfo->size,
			   asctime (LocalTime (&t))));
}

/* takes "/foo/bar/file" and gives malloced "\\foo\\bar\\file" */
static char *
smbfs_convert_path (const char *remote_file, gboolean trailing_asterik)
{
    const char *p, *my_remote;
    char *result;

    my_remote = remote_file;
    if (strncmp (my_remote, URL_HEADER, HEADER_LEN) == 0) {	/* if passed directly */
		my_remote += HEADER_LEN;
		if (*my_remote == '/')		/* from server browsing */
			my_remote++;
		p = strchr(my_remote, '/');
		if (p)
			my_remote = p+1;	/* advance to end of server name */
	}

    if (*my_remote == '/')
        my_remote++;  /* strip off leading '/' */
    p = strchr(my_remote, '/');
    if (p)
        my_remote = p;   /* strip off share/service name */
    /* create remote filename as understood by smb clientgen */
    result = g_strconcat (my_remote, trailing_asterik ? "/*" : "", (char *) NULL);
    unix_to_dos (result, /* inplace = */ 1); /* code page conversion */
    str_replace(result, '/', '\\');
    return result;
}

static void
smbfs_srv_browsing_helper (const char *name, uint32 m, const char *comment,
			   void *state)
{
    dir_entry *new_entry = smbfs_new_dir_entry (name);

    (void) m;
    (void) state;

    /* show this as dir */
    new_entry->my_stat.st_mode =
	(S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP |
	 S_IXOTH) & myumask;

    DEBUG (3, ("\t%-16.16s     %s\n", name, comment));
}

static BOOL
smbfs_reconnect(smbfs_connection *conn, int *retries)
{
	char *host;
	DEBUG(3, ("RECONNECT\n"));

	if (*(conn->host) == 0)
		host = g_strdup(conn->cli->desthost);		/* server browsing */
	else
		host = g_strdup(conn->host);

	cli_shutdown(conn->cli);

   	if (!(conn->cli = smbfs_do_connect(host, conn->service))) {
		message (1, MSG_ERROR,
			_(" reconnect to %s failed\n "), conn->host);
		g_free(host);
		return False;
	}
	g_free(host);
	if (++(*retries) == 2)
		return False;
	return True;
}

static BOOL
smbfs_send(struct cli_state *cli)
{
	size_t len;
	size_t nwritten=0;
	ssize_t ret;

	len = smb_len(cli->outbuf) + 4;

	while (nwritten < len) {
		ret = write_socket(cli->fd, cli->outbuf+nwritten, len - nwritten);
		if (ret <= 0) {
		    if (errno == EPIPE)
			return False;
		} else
		    nwritten += ret;
	}
	
	return True;
}

/****************************************************************************
See if server has cut us off by checking for EPIPE when writing.
Taken from cli_chkpath()
****************************************************************************/
static BOOL
smbfs_chkpath(struct cli_state *cli, const char *path, BOOL send_only)
{
	fstring path2;
	char *p;
	
	fstrcpy(path2,path);
        unix_to_dos (path2, 1);
	trim_string(path2,NULL,"\\");
	if (!*path2) *path2 = '\\';
	
	memset(cli->outbuf,'\0',smb_size);
	set_message(cli->outbuf,0,4 + strlen(path2),True);
	SCVAL(cli->outbuf,smb_com,SMBchkpth);
	SSVAL(cli->outbuf,smb_tid,cli->cnum);

	cli->rap_error = 0;
	cli->nt_error = 0;
	SSVAL(cli->outbuf,smb_pid,cli->pid);
	SSVAL(cli->outbuf,smb_uid,cli->vuid);
	SSVAL(cli->outbuf,smb_mid,cli->mid);
	if (cli->protocol > PROTOCOL_CORE) {
		SCVAL(cli->outbuf,smb_flg,0x8);
		SSVAL(cli->outbuf,smb_flg2,0x1);
	}
	
	p = smb_buf(cli->outbuf);
	*p++ = 4;
	fstrcpy(p,path2);

	if (!smbfs_send(cli)) {
		DEBUG(3, ("smbfs_chkpath: couldnt send\n"));
		return False;
	}
	if (send_only) {
		client_receive_smb(cli->fd, cli->inbuf, cli->timeout);
		DEBUG(3, ("smbfs_chkpath: send only OK\n"));
		return True;	/* just testing for EPIPE */
	}
	if (!client_receive_smb(cli->fd, cli->inbuf, cli->timeout)) {
		DEBUG(3, ("smbfs_chkpath: receive error\n"));
		return False;
	}
	if ((my_errno = cli_error(cli, NULL, NULL, NULL))) {
		if (my_errno == 20 || my_errno == 13)
			return True;	/* ignore if 'not a directory' error */
		DEBUG(3, ("smbfs_chkpath: cli_error: %s\n", g_strerror(my_errno)));
		return False;
	}

	return True;
}

#if 1
static int
smbfs_fs (const char *text)
{
	const char *p = text;
	int count = 0;
	
	while ((p = strchr(p, '/')) != NULL) {
		count++;
		p++;
	}
	if (count == 1)
		return strlen(text);
	return count;
}
#endif

static int
smbfs_loaddir (opendir_info *smbfs_info)
{
    uint16 attribute = aDIR | aSYSTEM | aHIDDEN;
    int servlen = strlen (smbfs_info->conn->service);
    const char *info_dirname = smbfs_info->dirname;
    char *my_dirname;

    DEBUG (3, ("smbfs_loaddir: dirname:%s\n", info_dirname));
    first_direntry = TRUE;

    if (current_info) {
	DEBUG (3,
	       ("smbfs_loaddir: new:'%s', cached:'%s'\n", info_dirname,
		current_info->dirname));
	/* if new desired dir is longer than cached in current_info */
	if (smbfs_fs (info_dirname) > smbfs_fs (current_info->dirname)) {
	    DEBUG (3, ("saving to previous_info\n"));
	    previous_info = current_info;
	}
    }

    current_info = smbfs_info;

    if (strcmp (info_dirname, "/") == 0) {
	if (!strcmp (smbfs_info->path, URL_HEADER)) {
	    DEBUG (6, ("smbfs_loaddir: browsing %s\n", IPC));
	    /* browse for servers */
	    if (!cli_NetServerEnum
		(smbfs_info->conn->cli, smbfs_info->conn->domain,
		 SV_TYPE_ALL, smbfs_srv_browsing_helper, NULL))
		return 0;
	    else
		current_server_info = smbfs_info;
	    smbfs_info->server_list = TRUE;
	} else {
	    /* browse for shares */
	    if (cli_RNetShareEnum
		(smbfs_info->conn->cli, smbfs_browsing_helper, NULL) < 1)
		return 0;
	    else
		current_share_info = smbfs_info;
	}
	goto done;
    }

    /* do regular directory listing */
    if (strncmp (smbfs_info->conn->service, info_dirname + 1, servlen) == 0) {
	/* strip share name from dir */
	my_dirname = g_strdup (info_dirname + servlen);
	*my_dirname = '/';
	my_dirname = free_after(smbfs_convert_path (my_dirname, TRUE), my_dirname);
    } else
	my_dirname = smbfs_convert_path (info_dirname, TRUE);

    DEBUG (6, ("smbfs_loaddir: service: %s\n", smbfs_info->conn->service));
    DEBUG (6,
	   ("smbfs_loaddir: cli->share: %s\n",
	    smbfs_info->conn->cli->share));
    DEBUG (6,
	   ("smbfs_loaddir: calling cli_list with mask %s\n", my_dirname));
    /* do file listing: cli_list returns number of files */
    if (cli_list
	(smbfs_info->conn->cli, my_dirname, attribute,
	 smbfs_loaddir_helper, NULL) < 0) {
	/* cli_list returns -1 if directory empty or cannot read socket */
	my_errno = cli_error (smbfs_info->conn->cli, NULL, &err, NULL);
	g_free (my_dirname);
	return 0;
    }
    if (*(my_dirname) == 0)
	smbfs_info->dirname = smbfs_info->conn->service;
    g_free (my_dirname);
/*	do_dskattr();	*/

  done:
/*	current_info->parent = smbfs_info->dirname;	*/

    smbfs_info->current = smbfs_info->entries;
    return 1;			/* 1 = ok */
}

#ifdef	SMBFS_FREE_DIR
static void
smbfs_free_dir (dir_entry *de)
{
    if (!de) return;

    smbfs_free_dir (de->next);
    g_free (de->text);
    g_free (de);
}
#endif


/* The readdir routine loads the complete directory */
/* It's too slow to ask the server each time */
/* It now also sends the complete lstat information for each file */
static void *
smbfs_readdir(void *info)
{
    static union vfs_dirent smbfs_readdir_data;
    static char *const dirent_dest = smbfs_readdir_data.dent.d_name;
    opendir_info *smbfs_info = (opendir_info *) info;

    DEBUG(4, ("smbfs_readdir(%s)\n", smbfs_info->dirname));

    if (!smbfs_info->entries)
	if (!smbfs_loaddir(smbfs_info))
	    return NULL;

    if (smbfs_info->current == 0) {	/* reached end of dir entries */
	DEBUG(3, ("smbfs_readdir: smbfs_info->current = 0\n"));
#ifdef	SMBFS_FREE_DIR
	smbfs_free_dir(smbfs_info->entries);
	smbfs_info->entries = 0;
#endif
	return NULL;
    }
    g_strlcpy(dirent_dest, smbfs_info->current->text, MC_MAXPATHLEN);
    smbfs_info->current = smbfs_info->current->next;

    compute_namelen(&smbfs_readdir_data.dent);

    return &smbfs_readdir_data;
}

static int
smbfs_closedir (void *info)
{
    opendir_info *smbfs_info = (opendir_info *) info;
/*    dir_entry *p, *q;	*/

	DEBUG(3, ("smbfs_closedir(%s)\n", smbfs_info->dirname));
	/*	CLOSE HERE */
    
/*    for (p = smbfs_info->entries; p;){
		q = p;
		p = p->next;
		g_free (q->text);
		g_free (q);
    }
    g_free (info);	*/
    return 0;
}

static int
smbfs_chmod (struct vfs_class *me, const char *path, int mode)
{
	(void) me;

	DEBUG(3, ("smbfs_chmod(path:%s, mode:%d)\n", path, mode));
/*	my_errno = EOPNOTSUPP;
	return -1;	*/	/* cannot chmod on smb filesystem */
	return 0;		/* make mc happy */
}

static int
smbfs_chown (struct vfs_class *me, const char *path, int owner, int group)
{
	(void) me;

	DEBUG(3, ("smbfs_chown(path:%s, owner:%d, group:%d)\n", path, owner, group));
	my_errno = EOPNOTSUPP;	/* ready for your labotomy? */
	return -1;
}

static int
smbfs_utime (struct vfs_class *me, const char *path, struct utimbuf *times)
{
	(void) me;
	(void) times;

	DEBUG(3, ("smbfs_utime(path:%s)\n", path));
	my_errno = EOPNOTSUPP;
	return -1;
}

static int
smbfs_readlink (struct vfs_class *me, const char *path, char *buf, size_t size)
{
	(void) me;

	DEBUG (3,
	    ("smbfs_readlink(path:%s, buf:%s, size:%d)\n", path, buf,
	    (int) size));
	my_errno = EOPNOTSUPP;
	return -1;		/* no symlinks on smb filesystem? */
}

static int
smbfs_symlink (struct vfs_class *me, const char *n1, const char *n2)
{
	(void) me;

	DEBUG(3, ("smbfs_symlink(n1:%s, n2:%s)\n", n1, n2));
	my_errno = EOPNOTSUPP;
	return -1;		/* no symlinks on smb filesystem? */
}

/* Extract the hostname and username from the path */
/* path is in the form: [user@]hostname/share/remote-dir */
#define smbfs_get_host_and_username(path, host, user, port, pass) \
	vfs_split_url (*path, host, user, port, pass, SMB_PORT, 0)

/***************************************************** 
	return a connection to a SMB server
	current_bucket needs to be set before calling
*******************************************************/
static struct cli_state *
smbfs_do_connect (const char *server, char *share)
{
	struct cli_state *c;
	struct nmb_name called, calling;
	struct in_addr ip;

	DEBUG(3, ("smbfs_do_connect(%s, %s)\n", server, share));
	if (*share == '\\') {
		server = share+2;
		share = strchr(server,'\\');
		if (!share) return NULL;
		*share = 0;
		share++;
	}

	make_nmb_name(&calling, global_myname, 0x0);
	make_nmb_name(&called , server, current_bucket->name_type);

    for (;;) {

	ip = (current_bucket->have_ip) ? current_bucket->dest_ip : ipzero;

	/* have to open a new connection */
	if (!(c = cli_initialise(NULL))) {
		my_errno = ENOMEM;
		return NULL;
	}

	pwd_init(&(c->pwd));	/* should be moved into cli_initialise()? */
	pwd_set_cleartext(&(c->pwd), current_bucket->password);

	if ((cli_set_port(c, current_bucket->port) == 0) ||
			!cli_connect(c, server, &ip)) {
		DEBUG(1, ("Connection to %s failed\n", server));
		break;
	}

	if (!cli_session_request(c, &calling, &called)) {
		my_errno = cli_error(c, NULL, &err, NULL);
		DEBUG(1, ("session request to %s failed\n", called.name));
		cli_shutdown(c);
		if (strcmp(called.name, "*SMBSERVER")) {
			make_nmb_name(&called , "*SMBSERVER", 0x20);
			continue;
		}
		return NULL;
	}

	DEBUG(3, (" session request ok\n"));

	if (!cli_negprot(c)) {
		DEBUG(1, ("protocol negotiation failed\n"));
		break;
	}

	if (!cli_session_setup(c, current_bucket->user, 
			       current_bucket->password, strlen(current_bucket->password),
			       current_bucket->password, strlen(current_bucket->password),
			       current_bucket->domain)) {
		DEBUG(1,("session setup failed: %s\n", cli_errstr(c)));
		smbfs_auth_remove (server, share);
		break;
	}

	if (*c->server_domain || *c->server_os || *c->server_type)
		DEBUG(5,("Domain=[%s] OS=[%s] Server=[%s]\n",
			c->server_domain,c->server_os,c->server_type));
	
	DEBUG(3, (" session setup ok\n"));

	if (!cli_send_tconX(c, share, "?????",
			    current_bucket->password, strlen(current_bucket->password)+1)) {
		DEBUG(1,("%s: tree connect failed: %s\n", share, cli_errstr(c)));
		break;
	}

	DEBUG(3, (" tconx ok\n"));

	my_errno = 0;
	return c;
    }

    my_errno = cli_error(c, NULL, &err, NULL);
    cli_shutdown(c);
    return NULL;
    
}

static int
smbfs_get_master_browser(char **host)
{
	static char so_broadcast[] = "SO_BROADCAST";
	int count;
	struct in_addr *ip_list, bcast_addr;

	/* does port = 137 for win95 master browser? */
	int fd= open_socket_in( SOCK_DGRAM, 0, 3,
                             interpret_addr(lp_socket_address()), True ); 
	if (fd == -1)
		return 0;
	set_socket_options(fd, so_broadcast);
	ip_list = iface_bcast(ipzero);
	bcast_addr = *ip_list;
	if ((ip_list = name_query(fd, "\01\02__MSBROWSE__\02", 1, True, 
		True, bcast_addr, &count, NULL))) {
		if (!count)
			return 0;
		/* just return first master browser */
		*host = g_strdup(inet_ntoa(ip_list[0]));
		return 1;
	}
	return 0;
}

static void 
smbfs_free_bucket (smbfs_connection *bucket)
{
	g_free (bucket->host);
	g_free (bucket->service);
	g_free (bucket->domain);
	g_free (bucket->user);
	wipe_password (bucket->password);
	g_free (bucket->home);
	memset (bucket, 0, sizeof (smbfs_connection));
}

static smbfs_connection *
smbfs_get_free_bucket (void)
{
    int i;
    
    for (i = 0; i < SMBFS_MAX_CONNECTIONS; i++)
		if (!smbfs_connections [i].cli) return &smbfs_connections [i];

	{	/* search for most dormant connection */
		int oldest = 0;	/* index */
		time_t oldest_time = smbfs_connections[0].last_use;
		for (i = 1; i < SMBFS_MAX_CONNECTIONS; i++) {
			if (smbfs_connections[i].last_use < oldest_time) {
				oldest_time = smbfs_connections[i].last_use;
				oldest = i;
			}
		}
		cli_shutdown(smbfs_connections[oldest].cli);
		smbfs_free_bucket (&smbfs_connections[oldest]);
		return &smbfs_connections[oldest];
	}

    /* This can't happend, since we have checked for max connections before */
    vfs_die("Internal error: smbfs_get_free_bucket");
    return 0;	/* shut up, stupid gcc */
}

/* This routine keeps track of open connections */
/* Returns a connected socket to host */
static smbfs_connection *
smbfs_open_link (char *host, char *path, const char *user, int *port,
		 char *this_pass)
{
    int i;
    smbfs_connection *bucket;
    pstring service;
    struct in_addr *dest_ip = NULL;

    DEBUG (3, ("smbfs_open_link(host:%s, path:%s)\n", host, path));

    if (strcmp (host, path) == 0)	/* if host & path are same: */
	pstrcpy (service, IPC);		/* setup for browse */
    else {			/* get share name from path, path starts with server name */
	char *p;
	if ((p = strchr (path, '/')))	/* get share aka                            */
	    pstrcpy (service, ++p);	/* service name from path               */
	else
	    pstrcpy (service, "");
	/* now check for trailing directory/filenames   */
	p = strchr (service, '/');
	if (p)
	    *p = 0;		/* cut off dir/files: sharename only */
	if (!*service)
	    pstrcpy (service, IPC);	/* setup for browse */
	DEBUG (6, ("smbfs_open_link: service from path:%s\n", service));
    }

    if (got_user)
	user = username;	/* global from getenv */

    /* Is the link actually open? */
    for (i = 0; i < SMBFS_MAX_CONNECTIONS; i++) {
	if (!smbfs_connections[i].cli)
	    continue;
	if ((strcmp (host, smbfs_connections[i].host) == 0) &&
	    (strcmp (user, smbfs_connections[i].user) == 0) &&
	    (strcmp (service, smbfs_connections[i].service) == 0)) {
	    int retries = 0;
	    BOOL inshare = (*host != 0 && *path != 0 && strchr (path, '/'));
	    /* check if this connection has died */
	    while (!smbfs_chkpath (smbfs_connections[i].cli, "\\", !inshare)) {
		if (!smbfs_reconnect (&smbfs_connections[i], &retries))
		    return 0;
	    }
	    DEBUG (6, ("smbfs_open_link: returning smbfs_connection[%d]\n", i));
	    current_bucket = &smbfs_connections[i];
	    smbfs_connections[i].last_use = time (NULL);
	    return &smbfs_connections[i];
	}
	/* connection not found, find if we have ip for new connection */
	if (strcmp (host, smbfs_connections[i].host) == 0)
	    dest_ip = &smbfs_connections[i].cli->dest_ip;
    }

    /* make new connection */
    bucket = smbfs_get_free_bucket ();
    bucket->name_type = 0x20;
    bucket->home = 0;
    bucket->port = *port;
    bucket->have_ip = False;
    if (dest_ip) {
	bucket->have_ip = True;
	bucket->dest_ip = *dest_ip;
    }
    current_bucket = bucket;

    bucket->user = g_strdup (user);
    bucket->service = g_strdup (service);

    if (!(*host)) {		/* if blank host name, browse for servers */
	if (!smbfs_get_master_browser (&host))	/* set host to ip of master browser */
	    return 0;		/* could not find master browser? */
	g_free (host);
	bucket->host = g_strdup ("");	/* blank host means master browser */
    } else
	bucket->host = g_strdup (host);

    if (!smbfs_bucket_set_authinfo (bucket, 0,	/* domain currently not used */
			      user, this_pass, 1))
	return 0;

    /* connect to share */
    while (!(bucket->cli = smbfs_do_connect (host, service))) {

	if (my_errno != EPERM)
	    return 0;
	message (1, MSG_ERROR, _(" Authentication failed "));

	/* authentication failed, try again */
	smbfs_auth_remove (bucket->host, bucket->service);
	if (!smbfs_bucket_set_authinfo (bucket, bucket->domain, bucket->user, 0, 0))
	    return 0;

    }

    smbfs_open_connections++;
    DEBUG (3, ("smbfs_open_link:smbfs_open_connections: %d\n",
	       smbfs_open_connections));
    return bucket;
}

static char *
smbfs_get_path (smbfs_connection ** sc, const char *path)
{
    char *user, *host, *remote_path, *pass;
    int port = SMB_PORT;

    DEBUG (3, ("smbfs_get_path(%s)\n", path));
    if (strncmp (path, URL_HEADER, HEADER_LEN))
	return NULL;
    path += HEADER_LEN;

    if (*path == '/')		/* '/' leading server name */
	path++;			/* probably came from server browsing */

    if ((remote_path =
	 smbfs_get_host_and_username (&path, &host, &user, &port, &pass)))
	if ((*sc =
	     smbfs_open_link (host, remote_path, user, &port, pass)) == NULL) {
	    g_free (remote_path);
	    remote_path = NULL;
	}
    g_free (host);
    g_free (user);
    if (pass)
	wipe_password (pass);

    if (!remote_path)
	return NULL;

    /* NOTE: tildes are deprecated. See ftpfs.c */
    {
	int f = !strcmp (remote_path, "/~");
	if (f || !strncmp (remote_path, "/~/", 3)) {
	    char *s;
	    s = concat_dir_and_file ((*sc)->home, remote_path + 3 - f);
	    g_free (remote_path);
	    return s;
	}
    }
    return remote_path;
}

#if 0
static int
is_error (int result, int errno_num)
{
    if (!(result == -1))
		return my_errno = 0;
    else 
		my_errno = errno_num;
    return 1;
}
#endif

static void *
smbfs_opendir (struct vfs_class *me, const char *dirname)
{
    opendir_info *smbfs_info;
	smbfs_connection *sc;
	char *remote_dir;

    (void) me;

    DEBUG(3, ("smbfs_opendir(dirname:%s)\n", dirname));

    if (!(remote_dir = smbfs_get_path (&sc, dirname)))
	return NULL;

    /* FIXME: where freed? */
    smbfs_info = g_new (opendir_info, 1);
	smbfs_info->server_list = FALSE;
    smbfs_info->path = g_strdup(dirname);		/* keep original */
	smbfs_info->dirname = remote_dir;
    smbfs_info->conn = sc;
    smbfs_info->entries = 0;
    smbfs_info->current = 0;

    return smbfs_info;
}

static int
smbfs_fake_server_stat (const char *server_url, const char *path, struct stat *buf)
{
    dir_entry *dentry;
    const char *p;

    (void) server_url;

    if ((p = strrchr (path, '/')))
	path = p + 1;		/* advance until last '/' */

    if (!current_info->entries) {
	if (!smbfs_loaddir (current_info))	/* browse host */
	    return -1;
    }

    if (current_info->server_list == True) {
	dentry = current_info->entries;
	DEBUG (4, ("fake stat for SERVER \"%s\"\n", path));
	while (dentry) {
	    if (strcmp (dentry->text, path) == 0) {
		DEBUG (4, ("smbfs_fake_server_stat: %s:%4o\n",
			   dentry->text, (int)dentry->my_stat.st_mode));
		memcpy (buf, &dentry->my_stat, sizeof (struct stat));
		return 0;
	    }
	    dentry = dentry->next;
	}
    }
    my_errno = ENOENT;
    return -1;
}

static int
smbfs_fake_share_stat (const char *server_url, const char *path, struct stat *buf)
{
    dir_entry *dentry;
    if (strlen (path) < strlen (server_url))
	return -1;

    if (!current_share_info) {	/* Server was not stat()ed */
	/* Make sure there is such share at server */
	smbfs_connection *sc;
	char *p;
	p = smbfs_get_path (&sc, path);
	g_free (p);
	if (p) {
	    memset (buf, 0, sizeof (*buf));
	    /*      show this as dir        */
	    buf->st_mode =
		(S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP |
		 S_IXOTH) & myumask;
	    return 0;
	}
	return -1;
    }

    path += strlen (server_url);	/* we only want share name */
    path++;

    if (*path == '/')		/* '/' leading server name */
	path++;			/* probably came from server browsing */

    if (!current_share_info->entries) {
	if (!smbfs_loaddir (current_share_info))	/* browse host */
	    return -1;
    }
    dentry = current_share_info->entries;
    DEBUG (3, ("smbfs_fake_share_stat: %s on %s\n", path, server_url));
    while (dentry) {
	if (strcmp (dentry->text, path) == 0) {
	    DEBUG (6, ("smbfs_fake_share_stat: %s:%4o\n",
		       dentry->text, (int) dentry->my_stat.st_mode));
	    memcpy (buf, &dentry->my_stat, sizeof (struct stat));
	    return 0;
	}
	dentry = dentry->next;
    }
    my_errno = ENOENT;
    return -1;
}

/* stat a single file, smbfs_get_remote_stat callback  */
static dir_entry *single_entry;

/* stat a single file */
static int
smbfs_get_remote_stat (smbfs_connection * sc, const char *path, struct stat *buf)
{
    uint16 attribute = aDIR | aSYSTEM | aHIDDEN;
    char *mypath;

    DEBUG (3, ("smbfs_get_remote_stat(): mypath:%s\n", path));

    mypath = smbfs_convert_path (path, FALSE);

#if 0	/* single_entry is never free()d now.  And only my_stat is used */
    single_entry = g_new (dir_entry, 1);

    single_entry->text = dos_to_unix (g_strdup (finfo->name), 1);

    single_entry->next = 0;
#endif
    if (!single_entry)
	single_entry = g_new0 (dir_entry, 1);

    if (cli_list
	(sc->cli, mypath, attribute, smbfs_loaddir_helper, single_entry) < 1) {
	my_errno = ENOENT;
	g_free (mypath);
	return -1;		/* cli_list returns number of files */
    }

    memcpy (buf, &single_entry->my_stat, sizeof (struct stat));

/* don't free here, use for smbfs_fstat() */
/*	g_free(single_entry->text);
	g_free(single_entry);	*/
    g_free (mypath);
    return 0;
}

static int
smbfs_search_dir_entry (dir_entry *dentry, const char *text, struct stat *buf)
{
	while (dentry) {
		if (strcmp(text, dentry->text) == 0) {
			memcpy(buf, &dentry->my_stat, sizeof(struct stat));
			memcpy(&single_entry->my_stat, &dentry->my_stat,
				sizeof(struct stat));
			return 0;
		}
		dentry = dentry->next;
	}
	return -1;
}

static int
smbfs_get_stat_info (smbfs_connection * sc, const char *path, struct stat *buf)
{
    char *p;
#if 0
    dir_entry *dentry = current_info->entries;
#endif
    const char *mypath = path;

    mypath++;			/* cut off leading '/' */
    if ((p = strrchr (mypath, '/')))
	mypath = p + 1;		/* advance until last file/dir name */
    DEBUG (3, ("smbfs_get_stat_info: mypath:%s, current_info->dirname:%s\n",
	       mypath, current_info->dirname));
#if 0
    if (!dentry) {
	DEBUG (1, ("No dir entries (empty dir) cached:'%s', wanted:'%s'\n",
		   current_info->dirname, path));
	return -1;
    }
#endif
    if (!single_entry)		/* when found, this will be written too */
	single_entry = g_new (dir_entry, 1);
    if (smbfs_search_dir_entry (current_info->entries, mypath, buf) == 0) {
	return 0;
    }
    /* now try to identify mypath as PARENT dir */
    {
	char *mdp;
	char *mydir;
	mdp = mydir = g_strdup (current_info->dirname);
	if ((p = strrchr (mydir, '/')))
	    *p = 0;		/* advance util last '/' */
	if ((p = strrchr (mydir, '/')))
	    mydir = p + 1;	/* advance util last '/' */
	if (strcmp (mydir, mypath) == 0) {	/* fake a stat for ".." */
	    memset (buf, 0, sizeof (struct stat));
	    buf->st_mode = (S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH) & myumask;
	    memcpy (&single_entry->my_stat, buf, sizeof (struct stat));
	    g_free (mdp);
	    DEBUG (1, ("	PARENT:found in %s\n", current_info->dirname));
	    return 0;
	}
	g_free (mdp);
    }
    /* now try to identify as CURRENT dir? */
    {
	char *dnp = current_info->dirname;
	DEBUG (6, ("smbfs_get_stat_info: is %s current dir? this dir is: %s\n",
		   mypath, current_info->dirname));
	if (*dnp == '/')
	    dnp++;
	else {
	    return -1;
	}
	if (strcmp (mypath, dnp) == 0) {
	    memset (buf, 0, sizeof (struct stat));
	    buf->st_mode = (S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH) & myumask;
	    memcpy (&single_entry->my_stat, buf, sizeof (struct stat));
	    DEBUG (1, ("	CURRENT:found in %s\n", current_info->dirname));
	    return 0;
	}
    }
    DEBUG (3, ("'%s' not found in current_info '%s'\n", path,
	       current_info->dirname));
    /* try to find this in the PREVIOUS listing */
    if (previous_info) {
	if (smbfs_search_dir_entry (previous_info->entries, mypath, buf) == 0)
	    return 0;
	DEBUG (3, ("'%s' not found in previous_info '%s'\n", path,
		   previous_info->dirname));
    }
    /* try to find this in the SHARE listing */
    if (current_share_info) {
	if (smbfs_search_dir_entry (current_share_info->entries, mypath, buf) == 0)
	    return 0;
	DEBUG (3, ("'%s' not found in share_info '%s'\n", path,
		   current_share_info->dirname));
    }
    /* try to find this in the SERVER listing */
    if (current_server_info) {
	if (smbfs_search_dir_entry (current_server_info->entries, mypath, buf) == 0)
	    return 0;
	DEBUG (3, ("'%s' not found in server_info '%s'\n", path,
		   current_server_info->dirname));
    }
    /* nothing found. get stat file info from server */
    return smbfs_get_remote_stat (sc, path, buf);
}

static int
smbfs_chdir (struct vfs_class *me, const char *path)
{
    char *remote_dir;
    smbfs_connection *sc;

    (void) me;

    DEBUG (3, ("smbfs_chdir(path:%s)\n", path));
    if (!(remote_dir = smbfs_get_path (&sc, path)))
	return -1;
    g_free (remote_dir);

    return 0;
}

static int
smbfs_loaddir_by_name (struct vfs_class *me, const char *path)
{
	void *info;
	char *mypath, *p;

	mypath = g_strdup(path);
	p = strrchr(mypath, '/');

	if (p > mypath)
		*p = 0;
	DEBUG(6, ("smbfs_loaddir_by_name(%s)\n", mypath));
	smbfs_chdir(me, mypath);
	info = smbfs_opendir (me, mypath);
	g_free(mypath);
	if (!info)
		return -1;
	smbfs_readdir(info);
	smbfs_loaddir(info);
	return 0;
}

static int
smbfs_stat (struct vfs_class * me, const char *path, struct stat *buf)
{
    smbfs_connection *sc;
    pstring server_url;
    char *service, *pp, *at;
    const char *p;

    DEBUG (3, ("smbfs_stat(path:%s)\n", path));

    if (!current_info) {
	DEBUG (1, ("current_info = NULL: "));
	if (smbfs_loaddir_by_name (me, path) < 0)
	    return -1;
    }

    /* check if stating server */
    p = path;
    if (strncmp (p, URL_HEADER, HEADER_LEN)) {
	DEBUG (1, ("'%s' doesnt start with '%s' (length %d)\n",
		   p, URL_HEADER, HEADER_LEN));
	return -1;
    }

    p += HEADER_LEN;
    if (*p == '/')
	p++;

    pp = strchr (p, '/');	/* advance past next '/' */
    at = strchr (p, '@');
    pstrcpy (server_url, URL_HEADER);
    if (at && at < pp) {	/* user@server */
    	char *z = &(server_url[sizeof (server_url) - 1]);
	const char *s = p;

	at = &(server_url [HEADER_LEN]) + (at - p + 1);
	if (z > at)
	    z = at;
	at = &(server_url [HEADER_LEN]);
	while (at < z)
	    *at++ = *s++;
	*z = 0;
    }
    pstrcat (server_url, current_bucket->host);

    if (!pp) {
	if (!current_info->server_list) {
	    if (smbfs_loaddir_by_name (me, path) < 0)
		return -1;
	}
	return smbfs_fake_server_stat (server_url, path, buf);
    }

    if (!strchr (++pp, '/')) {
	return smbfs_fake_share_stat (server_url, path, buf);
    }

    /* stating inside share at this point */
    if (!(service = smbfs_get_path (&sc, path)))  /* connects if necessary */
	return -1;
    {
	int hostlen = strlen (current_bucket->host);
	char *ppp = service + strlen (service) - hostlen;
	char *sp = server_url + strlen (server_url) - hostlen;

	if (strcmp (sp, ppp) == 0) {
	    /* make server name appear as directory */
	    DEBUG (1, ("smbfs_stat: showing server as directory\n"));
	    memset (buf, 0, sizeof (struct stat));
	    buf->st_mode = (S_IFDIR | S_IRUSR | S_IRGRP | S_IROTH) & myumask;
	    g_free (service);
	    return 0;
	}
    }
    /* check if current_info is in share requested */
    p = service;
    pp = strchr (p, '/');
    if (pp) {
	p = ++pp;		/* advance past server name */
	pp = strchr (p, '/');
    }
    if (pp)
	*pp = 0;		/* cut off everthing after service name */
    else
	p = IPC;		/* browsing for services */
    pp = current_info->dirname;
    if (*pp == '/')
	pp++;
    if (strncmp (p, pp, strlen (p)) != 0) {
	DEBUG (6, ("desired '%s' is not loaded, we have '%s'\n", p, pp));
	if (smbfs_loaddir_by_name (me, path) < 0) {
	    g_free (service);
	    return -1;
	}
	DEBUG (6, ("loaded dir: '%s'\n", current_info->dirname));
    }
    g_free (service);
    /* stat dirs & files under shares now */
    return smbfs_get_stat_info (sc, path, buf);
}

#define smbfs_lstat smbfs_stat	/* no symlinks on smb filesystem? */

static int
smbfs_lseek (void *data, off_t offset, int whence)
{
    smbfs_handle *info = (smbfs_handle *) data;
    size_t size;

    DEBUG (3,
	   ("smbfs_lseek(info->nread => %d, offset => %d, whence => %d) \n",
	    (int) info->nread, (int) offset, whence));

    switch (whence) {
    case SEEK_SET:
	info->nread = offset;
	break;
    case SEEK_CUR:
	info->nread += offset;
	break;
    case SEEK_END:
	if (!cli_qfileinfo (info->cli, info->fnum,
			    NULL, &size, NULL, NULL, NULL,
			    NULL, NULL) &&
	    !cli_getattrE (info->cli, info->fnum,
			   NULL, &size, NULL, NULL, NULL)) {
	    errno = EINVAL;
	    return -1;
	}
	info->nread = size + offset;
	break;
    }

    return info->nread;
}

static int
smbfs_mknod (struct vfs_class *me, const char *path, int mode, int dev)
{
    (void) me;

	DEBUG(3, ("smbfs_mknod(path:%s, mode:%d, dev:%d)\n", path, mode, dev));
	my_errno = EOPNOTSUPP;
    return -1;
}

static int
smbfs_mkdir (struct vfs_class * me, const char *path, mode_t mode)
{
    smbfs_connection *sc;
    char *remote_file;
    char *cpath;

    (void) me;

    DEBUG (3, ("smbfs_mkdir(path:%s, mode:%d)\n", path, (int) mode));
    if ((remote_file = smbfs_get_path (&sc, path)) == 0)
	return -1;
    g_free (remote_file);
    cpath = smbfs_convert_path (path, FALSE);

    if (!cli_mkdir (sc->cli, cpath)) {
	my_errno = cli_error (sc->cli, NULL, &err, NULL);
	message (1, MSG_ERROR, _(" Error %s creating directory %s "),
		    cli_errstr (sc->cli), CNV_LANG (cpath));
	g_free (cpath);
	return -1;
    }
    g_free (cpath);
    return 0;
}

static int
smbfs_rmdir (struct vfs_class *me, const char *path)
{
	smbfs_connection *sc;
	char *remote_file;
	char *cpath;

	(void) me;

	DEBUG(3, ("smbfs_rmdir(path:%s)\n", path));
	if ((remote_file = smbfs_get_path (&sc, path)) == 0)
		return -1;
	g_free (remote_file);
	cpath = smbfs_convert_path (path, FALSE);

	if (!cli_rmdir(sc->cli, cpath)) {
		my_errno = cli_error(sc->cli, NULL, &err, NULL);
		message (1, MSG_ERROR, _(" Error %s removing directory %s "), 
			cli_errstr(sc->cli), CNV_LANG(cpath));
		g_free (cpath);
		return -1;
	} 

	g_free (cpath);
	return 0;
}

static int
smbfs_link (struct vfs_class *me, const char *p1, const char *p2)
{
    (void) me;

    DEBUG (3, ("smbfs_link(p1:%s, p2:%s)\n", p1, p2));
    my_errno = EOPNOTSUPP;
    return -1;
}

static void
smbfs_free (vfsid id)
{
    DEBUG (3, ("smbfs_free(%p)\n", id));
    smbfs_auth_free_all ();
}

/* Gives up on a socket and reopens the connection, the child own the socket
 * now
 */
static void
smbfs_forget (const char *path)
{
    char *host, *user, *p;
    int port, i;

    if (strncmp (path, URL_HEADER, HEADER_LEN))
	return;

    DEBUG (3, ("smbfs_forget(path:%s)\n", path));

    path += 6;
    if (path[0] == '/' && path[1] == '/')
	path += 2;

    if ((p = smbfs_get_host_and_username (&path, &host, &user, &port, NULL))) {
	g_free (p);
	for (i = 0; i < SMBFS_MAX_CONNECTIONS; i++) {
	    if (smbfs_connections[i].cli
		&& (strcmp (host, smbfs_connections[i].host) == 0)
		&& (strcmp (user, smbfs_connections[i].user) == 0)
		&& (port == smbfs_connections[i].port)) {

		/* close socket: the child owns it now */
		cli_shutdown (smbfs_connections[i].cli);

		/* reopen the connection */
		smbfs_connections[i].cli =
		    smbfs_do_connect (host, smbfs_connections[i].service);
	    }
	}
    }
    g_free (host);
    g_free (user);
}

static int
smbfs_setctl (struct vfs_class *me, const char *path, int ctlop, void *arg)
{
    (void) me;
    (void) arg;

    DEBUG (3, ("smbfs_setctl(path:%s, ctlop:%d)\n", path, ctlop));
    switch (ctlop) {
    case VFS_SETCTL_FORGET:
	smbfs_forget (path);
	return 0;
    }
    return 0;
}


static smbfs_handle *
smbfs_open_readwrite (smbfs_handle *remote_handle, char *rname, int flags, int mode)
{
    size_t size;

    (void) mode;

    if (flags & O_TRUNC)	/* if it exists truncate to zero */
	DEBUG (3, ("smbfs_open: O_TRUNC\n"));

    remote_handle->fnum =
#if 1	/* Don't play with flags, it is cli_open() headache */
	cli_open (remote_handle->cli, rname, flags, DENY_NONE);
#else	/* What's a reasons to has this code ? */
	cli_open (remote_handle->cli, rname, ((flags & O_CREAT)
					      || (flags ==
						  (O_WRONLY | O_APPEND))) ?
		  flags : O_RDONLY, DENY_NONE);
#endif
    if (remote_handle->fnum == -1) {
	message (1, MSG_ERROR, _(" %s opening remote file %s "),
		    cli_errstr (remote_handle->cli), CNV_LANG (rname));
	DEBUG (1, ("smbfs_open(rname:%s) error:%s\n",
		   rname, cli_errstr (remote_handle->cli)));
	my_errno = cli_error (remote_handle->cli, NULL, &err, NULL);
	return NULL;
    }

    if (flags & O_CREAT)
	return remote_handle;

    if (!cli_qfileinfo (remote_handle->cli, remote_handle->fnum,
			&remote_handle->attr, &size, NULL, NULL, NULL, NULL,
			NULL)
	&& !cli_getattrE (remote_handle->cli, remote_handle->fnum,
			  &remote_handle->attr, &size, NULL, NULL, NULL)) {
	message (1, MSG_ERROR, " getattrib: %s ",
		    cli_errstr (remote_handle->cli));
	DEBUG (1,
	       ("smbfs_open(rname:%s) getattrib:%s\n", rname,
		cli_errstr (remote_handle->cli)));
	my_errno = cli_error (remote_handle->cli, NULL, &err, NULL);
	cli_close (remote_handle->cli, remote_handle->fnum);
	return NULL;
    }

    if ((flags == (O_WRONLY | O_APPEND)) /* file.c:copy_file_file() -> do_append */
	&& smbfs_lseek (remote_handle, 0, SEEK_END) == -1) {
	cli_close (remote_handle->cli, remote_handle->fnum);
	return NULL;
    }

    return remote_handle;
}

static void *
smbfs_open (struct vfs_class *me, const char *file, int flags, int mode)
{
    char *remote_file;
    void *ret;
    smbfs_connection	*sc;
    smbfs_handle	*remote_handle;

    (void) me;

    DEBUG(3, ("smbfs_open(file:%s, flags:%d, mode:%o)\n", file, flags, mode));

    if (!(remote_file = smbfs_get_path (&sc, file)))
	return 0;

    remote_file = free_after(smbfs_convert_path (remote_file, FALSE), remote_file);

    remote_handle		= g_new (smbfs_handle, 2);
    remote_handle->cli		= sc->cli;
    remote_handle->nread	= 0;

    ret = smbfs_open_readwrite (remote_handle, remote_file, flags, mode);

    g_free (remote_file);
    if (!ret)
	g_free (remote_handle);

    return ret;
}

static int
smbfs_unlink (struct vfs_class *me, const char *path)
{
    smbfs_connection *sc;
    char *remote_file;

    (void) me;

    if ((remote_file = smbfs_get_path (&sc, path)) == 0)
	return -1;

    remote_file = free_after(smbfs_convert_path (remote_file, FALSE), remote_file);

    if (!cli_unlink(sc->cli, remote_file)) {
	message (1, MSG_ERROR, _(" %s removing remote file %s "), 
			cli_errstr(sc->cli), CNV_LANG(remote_file));
	g_free (remote_file);
	return -1;
    }   
    g_free (remote_file);
    return 0;
}

static int
smbfs_rename (struct vfs_class *me, const char *a, const char *b)
{
    smbfs_connection *sc;
    char *ra, *rb;
    int retval;

    (void) me;

    if ((ra = smbfs_get_path (&sc, a)) == 0)
	return -1;
 
    if ((rb = smbfs_get_path (&sc, b)) == 0) {
	g_free (ra);
	return -1;
    }

    ra = free_after (smbfs_convert_path (ra, FALSE), ra);
    rb = free_after (smbfs_convert_path (rb, FALSE), rb);

    retval = cli_rename(sc->cli, ra, rb);

    g_free (ra);
    g_free (rb);

    if (!retval) {
	message (1, MSG_ERROR, _(" %s renaming files\n"), 
			cli_errstr(sc->cli));
	return -1;
    }   
    return 0;
}

static int
smbfs_fstat (void *data, struct stat *buf)
{
    smbfs_handle *remote_handle = (smbfs_handle *)data;

	DEBUG(3, ("smbfs_fstat(fnum:%d)\n", remote_handle->fnum));

	/* use left over from previous smbfs_get_remote_stat, if available */
	if (single_entry)
		memcpy(buf, &single_entry->my_stat, sizeof(struct stat));
	else {	/* single_entry not set up: bug */
		my_errno = EFAULT;
		return -EFAULT;
	}
	return 0;
}

void
init_smbfs (void)
{
    vfs_smbfs_ops.name = "smbfs";
    vfs_smbfs_ops.prefix = "smb:";
    vfs_smbfs_ops.flags = VFSF_NOLINKS;
    vfs_smbfs_ops.init = smbfs_init;
    vfs_smbfs_ops.fill_names = smbfs_fill_names;
    vfs_smbfs_ops.open = smbfs_open;
    vfs_smbfs_ops.close = smbfs_close;
    vfs_smbfs_ops.read = smbfs_read;
    vfs_smbfs_ops.write = smbfs_write;
    vfs_smbfs_ops.opendir = smbfs_opendir;
    vfs_smbfs_ops.readdir = smbfs_readdir;
    vfs_smbfs_ops.closedir = smbfs_closedir;
    vfs_smbfs_ops.stat = smbfs_stat;
    vfs_smbfs_ops.lstat = smbfs_lstat;
    vfs_smbfs_ops.fstat = smbfs_fstat;
    vfs_smbfs_ops.chmod = smbfs_chmod;
    vfs_smbfs_ops.chown = smbfs_chown;
    vfs_smbfs_ops.utime = smbfs_utime;
    vfs_smbfs_ops.readlink = smbfs_readlink;
    vfs_smbfs_ops.symlink = smbfs_symlink;
    vfs_smbfs_ops.link = smbfs_link;
    vfs_smbfs_ops.unlink = smbfs_unlink;
    vfs_smbfs_ops.rename = smbfs_rename;
    vfs_smbfs_ops.chdir = smbfs_chdir;
    vfs_smbfs_ops.ferrno = smbfs_errno;
    vfs_smbfs_ops.lseek = smbfs_lseek;
    vfs_smbfs_ops.mknod = smbfs_mknod;
    vfs_smbfs_ops.free = smbfs_free;
    vfs_smbfs_ops.mkdir = smbfs_mkdir;
    vfs_smbfs_ops.rmdir = smbfs_rmdir;
    vfs_smbfs_ops.setctl = smbfs_setctl;
    vfs_register_class (&vfs_smbfs_ops);
}