modules/access/smb.c

   1 /*****************************************************************************
   2  * smb.c: SMB input module
   3  *****************************************************************************
   4  * Copyright (C) 2001-2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include <vlc_common.h>
  32 #include <vlc_fs.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_access.h>
  35
  36 #ifdef WIN32
  37 #   ifdef HAVE_FCNTL_H
  38 #       include <fcntl.h>
  39 #   endif
  40 #   ifdef HAVE_SYS_STAT_H
  41 #       include <sys/stat.h>
  42 #   endif
  43 #   include <io.h>
  44 #   define smbc_open(a,b,c) vlc_open(a,b,c)
  45 #   define smbc_fstat(a,b) _fstati64(a,b)
  46 #   define smbc_read read
  47 #   define smbc_lseek _lseeki64
  48 #   define smbc_close close
  49 #else
  50 #   include <libsmbclient.h>
  51 #endif
  52
  53 #include <errno.h>
  54
  55 /*****************************************************************************
  56  * Module descriptor
  57  *****************************************************************************/
  58 static int  Open ( vlc_object_t * );
  59 static void Close( vlc_object_t * );
  60
  61 #define CACHING_TEXT N_("Caching value in ms")
  62 #define CACHING_LONGTEXT N_( \
  63     "Caching value for SMB streams. This " \
  64     "value should be set in milliseconds." )
  65 #define USER_TEXT N_("SMB user name")
  66 #define USER_LONGTEXT N_("User name that will " \
  67     "be used for the connection.")
  68 #define PASS_TEXT N_("SMB password")
  69 #define PASS_LONGTEXT N_("Password that will be " \
  70     "used for the connection.")
  71 #define DOMAIN_TEXT N_("SMB domain")
  72 #define DOMAIN_LONGTEXT N_("Domain/Workgroup that " \
  73     "will be used for the connection.")
  74
  75 #define SMB_HELP N_("Samba (Windows network shares) input")
  76 vlc_module_begin ()
  77     set_shortname( "SMB" )
  78     set_description( N_("SMB input") )
  79     set_help(SMB_HELP)
  80     set_capability( "access", 0 )
  81     set_category( CAT_INPUT )
  82     set_subcategory( SUBCAT_INPUT_ACCESS )
  83     add_integer( "smb-caching", 2 * DEFAULT_PTS_DELAY / 1000,
  84                  CACHING_TEXT, CACHING_LONGTEXT, true )
  85         change_safe()
  86     add_string( "smb-user", NULL, USER_TEXT, USER_LONGTEXT,
  87                 false )
  88     add_password( "smb-pwd", NULL, PASS_TEXT,
  89                   PASS_LONGTEXT, false )
  90     add_string( "smb-domain", NULL, DOMAIN_TEXT,
  91                 DOMAIN_LONGTEXT, false )
  92     add_shortcut( "smb" )
  93     set_callbacks( Open, Close )
  94 vlc_module_end ()
  95
  96 /*****************************************************************************
  97  * Local prototypes
  98  *****************************************************************************/
  99 static ssize_t Read( access_t *, uint8_t *, size_t );
 100 static int Seek( access_t *, uint64_t );
 101 static int Control( access_t *, int, va_list );
 102
 103 struct access_sys_t
 104 {
 105     int i_smb;
 106 };
 107
 108 #ifdef WIN32
 109 static void Win32AddConnection( access_t *, char *, char *, char *, char * );
 110 #else
 111 static void smb_auth( const char *srv, const char *shr, char *wg, int wglen,
 112                       char *un, int unlen, char *pw, int pwlen )
 113 {
 114     VLC_UNUSED(srv);
 115     VLC_UNUSED(shr);
 116     VLC_UNUSED(wg);
 117     VLC_UNUSED(wglen);
 118     VLC_UNUSED(un);
 119     VLC_UNUSED(unlen);
 120     VLC_UNUSED(pw);
 121     VLC_UNUSED(pwlen);
 122     //wglen = unlen = pwlen = 0;
 123 }
 124 #endif
 125
 126 /****************************************************************************
 127  * Open: connect to smb server and ask for file
 128  ****************************************************************************/
 129 static int Open( vlc_object_t *p_this )
 130 {
 131     access_t     *p_access = (access_t*)p_this;
 132     access_sys_t *p_sys;
 133     struct stat  filestat;
 134     char         *psz_location, *psz_uri;
 135     char         *psz_user = NULL, *psz_pwd = NULL, *psz_domain = NULL;
 136     int          i_ret;
 137     int          i_smb;
 138
 139     /* Parse input URI
 140      * [[[domain;]user[:password@]]server[/share[/path[/file]]]] */
 141     psz_location = strchr( p_access->psz_location, '/' );
 142     if( !psz_location )
 143     {
 144         msg_Err( p_access, "invalid SMB URI: smb://%s", psz_location );
 145         return VLC_EGENERIC;
 146     }
 147     else
 148     {
 149         char *psz_tmp = strdup( p_access->psz_location );
 150         char *psz_parser;
 151
 152         psz_tmp[ psz_location - p_access->psz_location ] = 0;
 153         psz_location = p_access->psz_location;
 154         psz_parser = strchr( psz_tmp, '@' );
 155         if( psz_parser )
 156         {
 157             /* User info is there */
 158             *psz_parser = 0;
 159             psz_location = p_access->psz_location + (psz_parser - psz_tmp) + 1;
 160
 161             psz_parser = strchr( psz_tmp, ':' );
 162             if( psz_parser )
 163             {
 164                 /* Password found */
 165                 psz_pwd = strdup( psz_parser+1 );
 166                 *psz_parser = 0;
 167             }
 168
 169             psz_parser = strchr( psz_tmp, ';' );
 170             if( psz_parser )
 171             {
 172                 /* Domain found */
 173                 *psz_parser = 0; psz_parser++;
 174                 psz_domain = strdup( psz_tmp );
 175             }
 176             else psz_parser = psz_tmp;
 177
 178             psz_user = strdup( psz_parser );
 179         }
 180
 181         free( psz_tmp );
 182     }
 183
 184     /* Build an SMB URI
 185      * smb://[[[domain;]user[:password@]]server[/share[/path[/file]]]] */
 186
 187     if( !psz_user ) psz_user = var_InheritString( p_access, "smb-user" );
 188     if( psz_user && !*psz_user ) { free( psz_user ); psz_user = NULL; }
 189     if( !psz_pwd ) psz_pwd = var_InheritString( p_access, "smb-pwd" );
 190     if( psz_pwd && !*psz_pwd ) { free( psz_pwd ); psz_pwd = NULL; }
 191     if( !psz_domain ) psz_domain = var_InheritString( p_access, "smb-domain" );
 192     if( psz_domain && !*psz_domain ) { free( psz_domain ); psz_domain = NULL; }
 193
 194 #ifdef WIN32
 195     if( psz_user )
 196         Win32AddConnection( p_access, psz_location, psz_user, psz_pwd, psz_domain);
 197     i_ret = asprintf( &psz_uri, "//%s", psz_location );
 198 #else
 199     if( psz_user )
 200         i_ret = asprintf( &psz_uri, "smb://%s%s%s%s%s@%s",
 201                           psz_domain ? psz_domain : "", psz_domain ? ";" : "",
 202                           psz_user, psz_pwd ? ":" : "",
 203                           psz_pwd ? psz_pwd : "", psz_location );
 204     else
 205         i_ret = asprintf( &psz_uri, "smb://%s", psz_location );
 206 #endif
 207
 208     free( psz_user );
 209     free( psz_pwd );
 210     free( psz_domain );
 211
 212     if( i_ret == -1 )
 213         return VLC_ENOMEM;
 214
 215 #ifndef WIN32
 216     if( smbc_init( smb_auth, 0 ) )
 217     {
 218         free( psz_uri );
 219         return VLC_EGENERIC;
 220     }
 221 #endif
 222
 223 /*
 224 ** some version of glibc defines open as a macro, causing havoc
 225 ** with other macros using 'open' under the hood, such as the
 226 ** following one:
 227 */
 228 #if defined(smbc_open) && defined(open)
 229 # undef open
 230 #endif
 231     if( (i_smb = smbc_open( psz_uri, O_RDONLY, 0 )) < 0 )
 232     {
 233         msg_Err( p_access, "open failed for '%s' (%m)",
 234                  p_access->psz_location );
 235         free( psz_uri );
 236         return VLC_EGENERIC;
 237     }
 238
 239     /* Init p_access */
 240     STANDARD_READ_ACCESS_INIT;
 241
 242     i_ret = smbc_fstat( i_smb, &filestat );
 243     if( i_ret )
 244     {
 245         errno = i_ret;
 246         msg_Err( p_access, "stat failed (%m)" );
 247     }
 248     else
 249         p_access->info.i_size = filestat.st_size;
 250
 251     free( psz_uri );
 252
 253     p_sys->i_smb = i_smb;
 254
 255     /* Update default_pts to a suitable value for smb access */
 256     var_Create( p_access, "smb-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 257
 258     return VLC_SUCCESS;
 259 }
 260
 261 /*****************************************************************************
 262  * Close: free unused data structures
 263  *****************************************************************************/
 264 static void Close( vlc_object_t *p_this )
 265 {
 266     access_t     *p_access = (access_t*)p_this;
 267     access_sys_t *p_sys = p_access->p_sys;
 268
 269     smbc_close( p_sys->i_smb );
 270     free( p_sys );
 271 }
 272
 273 /*****************************************************************************
 274  * Seek: try to go at the right place
 275  *****************************************************************************/
 276 static int Seek( access_t *p_access, uint64_t i_pos )
 277 {
 278     access_sys_t *p_sys = p_access->p_sys;
 279     int64_t      i_ret;
 280
 281     if( i_pos >= INT64_MAX )
 282         return VLC_EGENERIC;
 283
 284     msg_Dbg( p_access, "seeking to %"PRId64, i_pos );
 285
 286     i_ret = smbc_lseek( p_sys->i_smb, i_pos, SEEK_SET );
 287     if( i_ret == -1 )
 288     {
 289         msg_Err( p_access, "seek failed (%m)" );
 290         return VLC_EGENERIC;
 291     }
 292
 293     p_access->info.b_eof = false;
 294     p_access->info.i_pos = i_ret;
 295
 296     return VLC_SUCCESS;
 297 }
 298
 299 /*****************************************************************************
 300  * Read:
 301  *****************************************************************************/
 302 static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
 303 {
 304     access_sys_t *p_sys = p_access->p_sys;
 305     int i_read;
 306
 307     if( p_access->info.b_eof ) return 0;
 308
 309     i_read = smbc_read( p_sys->i_smb, p_buffer, i_len );
 310     if( i_read < 0 )
 311     {
 312         msg_Err( p_access, "read failed (%m)" );
 313         return -1;
 314     }
 315
 316     if( i_read == 0 ) p_access->info.b_eof = true;
 317     else if( i_read > 0 ) p_access->info.i_pos += i_read;
 318
 319     return i_read;
 320 }
 321
 322 /*****************************************************************************
 323  * Control:
 324  *****************************************************************************/
 325 static int Control( access_t *p_access, int i_query, va_list args )
 326 {
 327     switch( i_query )
 328     {
 329     case ACCESS_CAN_SEEK:
 330     case ACCESS_CAN_FASTSEEK:
 331     case ACCESS_CAN_PAUSE:
 332     case ACCESS_CAN_CONTROL_PACE:
 333         *va_arg( args, bool* ) = true;
 334         break;
 335
 336     case ACCESS_GET_PTS_DELAY:
 337         *va_arg( args, int64_t * )
 338                   = var_GetInteger( p_access, "smb-caching" ) * 1000;
 339         break;
 340
 341     case ACCESS_SET_PAUSE_STATE:
 342         /* Nothing to do */
 343         break;
 344
 345     case ACCESS_GET_TITLE_INFO:
 346     case ACCESS_SET_TITLE:
 347     case ACCESS_SET_SEEKPOINT:
 348     case ACCESS_SET_PRIVATE_ID_STATE:
 349     case ACCESS_GET_CONTENT_TYPE:
 350         return VLC_EGENERIC;
 351
 352     default:
 353         msg_Warn( p_access, "unimplemented query in control" );
 354         return VLC_EGENERIC;
 355
 356     }
 357
 358     return VLC_SUCCESS;
 359 }
 360
 361 #ifdef WIN32
 362 static void Win32AddConnection( access_t *p_access, char *psz_path,
 363                                 char *psz_user, char *psz_pwd,
 364                                 char *psz_domain )
 365 {
 366     DWORD WINAPI (*OurWNetAddConnection2)( LPNETRESOURCE, LPCTSTR, LPCTSTR, DWORD );
 367     char psz_remote[MAX_PATH], psz_server[MAX_PATH], psz_share[MAX_PATH];
 368     NETRESOURCE net_resource;
 369     DWORD i_result;
 370     char *psz_parser;
 371     VLC_UNUSED( psz_domain );
 372
 373     HINSTANCE hdll = LoadLibrary(_T("MPR.DLL"));
 374     if( !hdll )
 375     {
 376         msg_Warn( p_access, "couldn't load mpr.dll" );
 377         return;
 378     }
 379
 380     OurWNetAddConnection2 =
 381       (void *)GetProcAddress( hdll, _T("WNetAddConnection2A") );
 382     if( !OurWNetAddConnection2 )
 383     {
 384         msg_Warn( p_access, "couldn't find WNetAddConnection2 in mpr.dll" );
 385         return;
 386     }
 387
 388     memset( &net_resource, 0, sizeof(net_resource) );
 389     net_resource.dwType = RESOURCETYPE_DISK;
 390
 391     /* Find out server and share names */
 392     strlcpy( psz_server, psz_path, sizeof( psz_server ) );
 393     psz_share[0] = 0;
 394     psz_parser = strchr( psz_path, '/' );
 395     if( psz_parser )
 396     {
 397         char *psz_parser2 = strchr( ++psz_parser, '/' );
 398         if( psz_parser2 )
 399             strlcpy( psz_share, psz_parser, sizeof( psz_share ) );
 400    }
 401
 402     snprintf( psz_remote, sizeof( psz_remote ), "\\\\%s\\%s", psz_server, psz_share );
 403     net_resource.lpRemoteName = psz_remote;
 404
 405     i_result = OurWNetAddConnection2( &net_resource, psz_pwd, psz_user, 0 );
 406
 407     if( i_result != NO_ERROR )
 408     {
 409         msg_Dbg( p_access, "connected to %s", psz_remote );
 410     }
 411     else if( i_result != ERROR_ALREADY_ASSIGNED &&
 412              i_result != ERROR_DEVICE_ALREADY_REMEMBERED )
 413     {
 414         msg_Dbg( p_access, "already connected to %s", psz_remote );
 415     }
 416     else
 417     {
 418         msg_Dbg( p_access, "failed to connect to %s", psz_remote );
 419     }
 420
 421     FreeLibrary( hdll );
 422 }
 423 #endif // WIN32