source3/modules/vfs_cap.c

   1 /*
   2  * CAP VFS module for Samba 3.x Version 0.3
   3  *
   4  * Copyright (C) Tim Potter, 1999-2000
   5  * Copyright (C) Alexander Bokovoy, 2002-2003
   6  * Copyright (C) Stefan (metze) Metzmacher, 2003
   7  * Copyright (C) TAKAHASHI Motonobu (monyo), 2003
   8  * Copyright (C) Jeremy Allison, 2007
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 3 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24
  25 #include "includes.h"
  26 #include "smbd/smbd.h"
  27
  28 /* cap functions */
  29 static char *capencode(TALLOC_CTX *ctx, const char *from);
  30 static char *capdecode(TALLOC_CTX *ctx, const char *from);
  31
  32 static uint64_t cap_disk_free(vfs_handle_struct *handle, const char *path,
  33         bool small_query, uint64_t *bsize,
  34         uint64_t *dfree, uint64_t *dsize)
  35 {
  36         char *cappath = capencode(talloc_tos(), path);
  37
  38         if (!cappath) {
  39                 errno = ENOMEM;
  40                 return (uint64_t)-1;
  41         }
  42         return SMB_VFS_NEXT_DISK_FREE(handle, cappath, small_query, bsize,
  43                                         dfree, dsize);
  44 }
  45
  46 static DIR *cap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
  47 {
  48         char *capname = capencode(talloc_tos(), fname);
  49
  50         if (!capname) {
  51                 errno = ENOMEM;
  52                 return NULL;
  53         }
  54         return SMB_VFS_NEXT_OPENDIR(handle, capname, mask, attr);
  55 }
  56
  57 static struct dirent *cap_readdir(vfs_handle_struct *handle,
  58                                       DIR *dirp,
  59                                       SMB_STRUCT_STAT *sbuf)
  60 {
  61         struct dirent *result;
  62         struct dirent *newdirent;
  63         char *newname;
  64         size_t newnamelen;
  65         DEBUG(3,("cap: cap_readdir\n"));
  66
  67         result = SMB_VFS_NEXT_READDIR(handle, dirp, NULL);
  68         if (!result) {
  69                 return NULL;
  70         }
  71
  72         newname = capdecode(talloc_tos(), result->d_name);
  73         if (!newname) {
  74                 return NULL;
  75         }
  76         DEBUG(3,("cap: cap_readdir: %s\n", newname));
  77         newnamelen = strlen(newname)+1;
  78         newdirent = (struct dirent *)talloc_array(talloc_tos(),
  79                         char,
  80                         sizeof(struct dirent)+
  81                                 newnamelen);
  82         if (!newdirent) {
  83                 return NULL;
  84         }
  85         memcpy(newdirent, result, sizeof(struct dirent));
  86         memcpy(&newdirent->d_name, newname, newnamelen);
  87         return newdirent;
  88 }
  89
  90 static int cap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
  91 {
  92         char *cappath = capencode(talloc_tos(), path);
  93
  94         if (!cappath) {
  95                 errno = ENOMEM;
  96                 return -1;
  97         }
  98         return SMB_VFS_NEXT_MKDIR(handle, cappath, mode);
  99 }
 100
 101 static int cap_rmdir(vfs_handle_struct *handle, const char *path)
 102 {
 103         char *cappath = capencode(talloc_tos(), path);
 104
 105         if (!cappath) {
 106                 errno = ENOMEM;
 107                 return -1;
 108         }
 109         return SMB_VFS_NEXT_RMDIR(handle, cappath);
 110 }
 111
 112 static int cap_open(vfs_handle_struct *handle, struct smb_filename *smb_fname,
 113                     files_struct *fsp, int flags, mode_t mode)
 114 {
 115         char *cappath;
 116         char *tmp_base_name = NULL;
 117         int ret;
 118
 119         cappath = capencode(talloc_tos(), smb_fname->base_name);
 120
 121         if (!cappath) {
 122                 errno = ENOMEM;
 123                 return -1;
 124         }
 125
 126         tmp_base_name = smb_fname->base_name;
 127         smb_fname->base_name = cappath;
 128
 129         DEBUG(3,("cap: cap_open for %s\n", smb_fname_str_dbg(smb_fname)));
 130         ret = SMB_VFS_NEXT_OPEN(handle, smb_fname, fsp, flags, mode);
 131
 132         smb_fname->base_name = tmp_base_name;
 133         TALLOC_FREE(cappath);
 134
 135         return ret;
 136 }
 137
 138 static int cap_rename(vfs_handle_struct *handle,
 139                       const struct smb_filename *smb_fname_src,
 140                       const struct smb_filename *smb_fname_dst)
 141 {
 142         char *capold = NULL;
 143         char *capnew = NULL;
 144         struct smb_filename *smb_fname_src_tmp = NULL;
 145         struct smb_filename *smb_fname_dst_tmp = NULL;
 146         int ret = -1;
 147
 148         capold = capencode(talloc_tos(), smb_fname_src->base_name);
 149         capnew = capencode(talloc_tos(), smb_fname_dst->base_name);
 150         if (!capold || !capnew) {
 151                 errno = ENOMEM;
 152                 goto out;
 153         }
 154
 155         /* Setup temporary smb_filename structs. */
 156         smb_fname_src_tmp = cp_smb_filename(talloc_tos(), smb_fname_src);
 157         if (smb_fname_src_tmp == NULL) {
 158                 errno = ENOMEM;
 159                 goto out;
 160         }
 161         smb_fname_dst_tmp = cp_smb_filename(talloc_tos(), smb_fname_dst);
 162         if (smb_fname_dst_tmp == NULL) {
 163                 errno = ENOMEM;
 164                 goto out;
 165         }
 166
 167         smb_fname_src_tmp->base_name = capold;
 168         smb_fname_dst_tmp->base_name = capnew;
 169
 170         ret = SMB_VFS_NEXT_RENAME(handle, smb_fname_src_tmp,
 171                                   smb_fname_dst_tmp);
 172  out:
 173         TALLOC_FREE(capold);
 174         TALLOC_FREE(capnew);
 175         TALLOC_FREE(smb_fname_src_tmp);
 176         TALLOC_FREE(smb_fname_dst_tmp);
 177
 178         return ret;
 179 }
 180
 181 static int cap_stat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 182 {
 183         char *cappath;
 184         char *tmp_base_name = NULL;
 185         int ret;
 186
 187         cappath = capencode(talloc_tos(), smb_fname->base_name);
 188
 189         if (!cappath) {
 190                 errno = ENOMEM;
 191                 return -1;
 192         }
 193
 194         tmp_base_name = smb_fname->base_name;
 195         smb_fname->base_name = cappath;
 196
 197         ret = SMB_VFS_NEXT_STAT(handle, smb_fname);
 198
 199         smb_fname->base_name = tmp_base_name;
 200         TALLOC_FREE(cappath);
 201
 202         return ret;
 203 }
 204
 205 static int cap_lstat(vfs_handle_struct *handle, struct smb_filename *smb_fname)
 206 {
 207         char *cappath;
 208         char *tmp_base_name = NULL;
 209         int ret;
 210
 211         cappath = capencode(talloc_tos(), smb_fname->base_name);
 212
 213         if (!cappath) {
 214                 errno = ENOMEM;
 215                 return -1;
 216         }
 217
 218         tmp_base_name = smb_fname->base_name;
 219         smb_fname->base_name = cappath;
 220
 221         ret = SMB_VFS_NEXT_LSTAT(handle, smb_fname);
 222
 223         smb_fname->base_name = tmp_base_name;
 224         TALLOC_FREE(cappath);
 225
 226         return ret;
 227 }
 228
 229 static int cap_unlink(vfs_handle_struct *handle,
 230                       const struct smb_filename *smb_fname)
 231 {
 232         struct smb_filename *smb_fname_tmp = NULL;
 233         char *cappath = NULL;
 234         int ret;
 235
 236         cappath = capencode(talloc_tos(), smb_fname->base_name);
 237         if (!cappath) {
 238                 errno = ENOMEM;
 239                 return -1;
 240         }
 241
 242         /* Setup temporary smb_filename structs. */
 243         smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
 244         if (smb_fname_tmp == NULL) {
 245                 errno = ENOMEM;
 246                 return -1;
 247         }
 248
 249         smb_fname_tmp->base_name = cappath;
 250
 251         ret = SMB_VFS_NEXT_UNLINK(handle, smb_fname_tmp);
 252
 253         TALLOC_FREE(smb_fname_tmp);
 254         return ret;
 255 }
 256
 257 static int cap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 258 {
 259         char *cappath = capencode(talloc_tos(), path);
 260
 261         if (!cappath) {
 262                 errno = ENOMEM;
 263                 return -1;
 264         }
 265         return SMB_VFS_NEXT_CHMOD(handle, cappath, mode);
 266 }
 267
 268 static int cap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 269 {
 270         char *cappath = capencode(talloc_tos(), path);
 271
 272         if (!cappath) {
 273                 errno = ENOMEM;
 274                 return -1;
 275         }
 276         return SMB_VFS_NEXT_CHOWN(handle, cappath, uid, gid);
 277 }
 278
 279 static int cap_lchown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 280 {
 281         char *cappath = capencode(talloc_tos(), path);
 282
 283         if (!cappath) {
 284                 errno = ENOMEM;
 285                 return -1;
 286         }
 287         return SMB_VFS_NEXT_LCHOWN(handle, cappath, uid, gid);
 288 }
 289
 290 static int cap_chdir(vfs_handle_struct *handle, const char *path)
 291 {
 292         char *cappath = capencode(talloc_tos(), path);
 293
 294         if (!cappath) {
 295                 errno = ENOMEM;
 296                 return -1;
 297         }
 298         DEBUG(3,("cap: cap_chdir for %s\n", path));
 299         return SMB_VFS_NEXT_CHDIR(handle, cappath);
 300 }
 301
 302 static int cap_ntimes(vfs_handle_struct *handle,
 303                       const struct smb_filename *smb_fname,
 304                       struct smb_file_time *ft)
 305 {
 306         struct smb_filename *smb_fname_tmp = NULL;
 307         char *cappath = NULL;
 308         int ret;
 309
 310         cappath = capencode(talloc_tos(), smb_fname->base_name);
 311
 312         if (!cappath) {
 313                 errno = ENOMEM;
 314                 return -1;
 315         }
 316
 317         /* Setup temporary smb_filename structs. */
 318         smb_fname_tmp = cp_smb_filename(talloc_tos(), smb_fname);
 319         if (smb_fname_tmp == NULL) {
 320                 errno = ENOMEM;
 321                 return -1;
 322         }
 323
 324         smb_fname_tmp->base_name = cappath;
 325
 326         ret = SMB_VFS_NEXT_NTIMES(handle, smb_fname_tmp, ft);
 327
 328         TALLOC_FREE(smb_fname_tmp);
 329         return ret;
 330 }
 331
 332
 333 static int cap_symlink(vfs_handle_struct *handle, const char *oldpath,
 334                        const char *newpath)
 335 {
 336         char *capold = capencode(talloc_tos(), oldpath);
 337         char *capnew = capencode(talloc_tos(), newpath);
 338
 339         if (!capold || !capnew) {
 340                 errno = ENOMEM;
 341                 return -1;
 342         }
 343         return SMB_VFS_NEXT_SYMLINK(handle, capold, capnew);
 344 }
 345
 346 static int cap_readlink(vfs_handle_struct *handle, const char *path,
 347                         char *buf, size_t bufsiz)
 348 {
 349         char *cappath = capencode(talloc_tos(), path);
 350
 351         if (!cappath) {
 352                 errno = ENOMEM;
 353                 return -1;
 354         }
 355         return SMB_VFS_NEXT_READLINK(handle, cappath, buf, bufsiz);
 356 }
 357
 358 static int cap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 359 {
 360         char *capold = capencode(talloc_tos(), oldpath);
 361         char *capnew = capencode(talloc_tos(), newpath);
 362
 363         if (!capold || !capnew) {
 364                 errno = ENOMEM;
 365                 return -1;
 366         }
 367         return SMB_VFS_NEXT_LINK(handle, capold, capnew);
 368 }
 369
 370 static int cap_mknod(vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev)
 371 {
 372         char *cappath = capencode(talloc_tos(), path);
 373
 374         if (!cappath) {
 375                 errno = ENOMEM;
 376                 return -1;
 377         }
 378         return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
 379 }
 380
 381 static char *cap_realpath(vfs_handle_struct *handle, const char *path)
 382 {
 383         /* monyo need capencode'ed and capdecode'ed? */
 384         char *cappath = capencode(talloc_tos(), path);
 385
 386         if (!cappath) {
 387                 errno = ENOMEM;
 388                 return NULL;
 389         }
 390         return SMB_VFS_NEXT_REALPATH(handle, cappath);
 391 }
 392
 393 static int cap_chmod_acl(vfs_handle_struct *handle, const char *path, mode_t mode)
 394 {
 395         char *cappath = capencode(talloc_tos(), path);
 396
 397         /* If the underlying VFS doesn't have ACL support... */
 398         if (!cappath) {
 399                 errno = ENOMEM;
 400                 return -1;
 401         }
 402         return SMB_VFS_NEXT_CHMOD_ACL(handle, cappath, mode);
 403 }
 404
 405 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle,
 406                                       const char *path, SMB_ACL_TYPE_T type,
 407                                       TALLOC_CTX *mem_ctx)
 408 {
 409         char *cappath = capencode(talloc_tos(), path);
 410
 411         if (!cappath) {
 412                 errno = ENOMEM;
 413                 return (SMB_ACL_T)NULL;
 414         }
 415         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cappath, type, mem_ctx);
 416 }
 417
 418 static int cap_sys_acl_set_file(vfs_handle_struct *handle, const char *path, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 419 {
 420         char *cappath = capencode(talloc_tos(), path);
 421
 422         if (!cappath) {
 423                 errno = ENOMEM;
 424                 return -1;
 425         }
 426         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, cappath, acltype, theacl);
 427 }
 428
 429 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
 430 {
 431         char *cappath = capencode(talloc_tos(), path);
 432
 433         if (!cappath) {
 434                 errno = ENOMEM;
 435                 return -1;
 436         }
 437         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cappath);
 438 }
 439
 440 static ssize_t cap_getxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t size)
 441 {
 442         char *cappath = capencode(talloc_tos(), path);
 443         char *capname = capencode(talloc_tos(), name);
 444
 445         if (!cappath || !capname) {
 446                 errno = ENOMEM;
 447                 return -1;
 448         }
 449         return SMB_VFS_NEXT_GETXATTR(handle, cappath, capname, value, size);
 450 }
 451
 452 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, void *value, size_t size)
 453 {
 454         char *cappath = capencode(talloc_tos(), path);
 455
 456         if (!cappath) {
 457                 errno = ENOMEM;
 458                 return -1;
 459         }
 460         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, cappath, value, size);
 461 }
 462
 463 static ssize_t cap_listxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 464 {
 465         char *cappath = capencode(talloc_tos(), path);
 466
 467         if (!cappath) {
 468                 errno = ENOMEM;
 469                 return -1;
 470         }
 471         return SMB_VFS_NEXT_LISTXATTR(handle, cappath, list, size);
 472 }
 473
 474 static int cap_removexattr(vfs_handle_struct *handle, const char *path, const char *name)
 475 {
 476         char *cappath = capencode(talloc_tos(), path);
 477         char *capname = capencode(talloc_tos(), name);
 478
 479         if (!cappath || !capname) {
 480                 errno = ENOMEM;
 481                 return -1;
 482         }
 483         return SMB_VFS_NEXT_REMOVEXATTR(handle, cappath, capname);
 484 }
 485
 486 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path)
 487 {
 488         char *cappath = capencode(talloc_tos(), path);
 489
 490         if (!cappath) {
 491                 errno = ENOMEM;
 492                 return -1;
 493         }
 494         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, cappath);
 495 }
 496
 497 static int cap_setxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 498 {
 499         char *cappath = capencode(talloc_tos(), path);
 500         char *capname = capencode(talloc_tos(), name);
 501
 502         if (!cappath || !capname) {
 503                 errno = ENOMEM;
 504                 return -1;
 505         }
 506         return SMB_VFS_NEXT_SETXATTR(handle, cappath, capname, value, size, flags);
 507 }
 508
 509 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp, const char *path, const void *value, size_t size, int flags)
 510 {
 511         char *cappath = capencode(talloc_tos(), path);
 512
 513         if (!cappath) {
 514                 errno = ENOMEM;
 515                 return -1;
 516         }
 517         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, cappath, value, size, flags);
 518 }
 519
 520 static struct vfs_fn_pointers vfs_cap_fns = {
 521         .disk_free_fn = cap_disk_free,
 522         .opendir_fn = cap_opendir,
 523         .readdir_fn = cap_readdir,
 524         .mkdir_fn = cap_mkdir,
 525         .rmdir_fn = cap_rmdir,
 526         .open_fn = cap_open,
 527         .rename_fn = cap_rename,
 528         .stat_fn = cap_stat,
 529         .lstat_fn = cap_lstat,
 530         .unlink_fn = cap_unlink,
 531         .chmod_fn = cap_chmod,
 532         .chown_fn = cap_chown,
 533         .lchown_fn = cap_lchown,
 534         .chdir_fn = cap_chdir,
 535         .ntimes_fn = cap_ntimes,
 536         .symlink_fn = cap_symlink,
 537         .readlink_fn = cap_readlink,
 538         .link_fn = cap_link,
 539         .mknod_fn = cap_mknod,
 540         .realpath_fn = cap_realpath,
 541         .chmod_acl_fn = cap_chmod_acl,
 542         .sys_acl_get_file_fn = cap_sys_acl_get_file,
 543         .sys_acl_set_file_fn = cap_sys_acl_set_file,
 544         .sys_acl_delete_def_file_fn = cap_sys_acl_delete_def_file,
 545         .getxattr_fn = cap_getxattr,
 546         .fgetxattr_fn = cap_fgetxattr,
 547         .listxattr_fn = cap_listxattr,
 548         .removexattr_fn = cap_removexattr,
 549         .fremovexattr_fn = cap_fremovexattr,
 550         .setxattr_fn = cap_setxattr,
 551         .fsetxattr_fn = cap_fsetxattr
 552 };
 553
 554 NTSTATUS vfs_cap_init(void);
 555 NTSTATUS vfs_cap_init(void)
 556 {
 557         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap",
 558                                 &vfs_cap_fns);
 559 }
 560
 561 /* For CAP functions */
 562 #define hex_tag ':'
 563 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 564 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 565 #define is_hex(s)               ((s)[0] == hex_tag)
 566
 567 static unsigned char hex2bin_table[256] = {
 568 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 569 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 570 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 571 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 572 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 573 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 574 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 575 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 576 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 577 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 578 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 579 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 580 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 581 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 582 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 583 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 584 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 585 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 586 };
 587 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 588
 589 /*******************************************************************
 590   original code -> ":xx"  - CAP format
 591 ********************************************************************/
 592
 593 static char *capencode(TALLOC_CTX *ctx, const char *from)
 594 {
 595         char *out = NULL;
 596         const char *p1;
 597         char *to = NULL;
 598         size_t len = 0;
 599
 600         for (p1 = from; *p1; p1++) {
 601                 if ((unsigned char)*p1 >= 0x80) {
 602                         len += 3;
 603                 } else {
 604                         len++;
 605                 }
 606         }
 607         len++;
 608
 609         to = talloc_array(ctx, char, len);
 610         if (!to) {
 611                 return NULL;
 612         }
 613
 614         for (out = to; *from;) {
 615                 /* buffer husoku error */
 616                 if ((unsigned char)*from >= 0x80) {
 617                         *out++ = hex_tag;
 618                         *out++ = bin2hex (((*from)>>4)&0x0f);
 619                         *out++ = bin2hex ((*from)&0x0f);
 620                         from++;
 621                 } else {
 622                         *out++ = *from++;
 623                 }
 624         }
 625         *out = '\0';
 626         return to;
 627 }
 628
 629 /*******************************************************************
 630   CAP -> original code
 631 ********************************************************************/
 632 /* ":xx" -> a byte */
 633
 634 static char *capdecode(TALLOC_CTX *ctx, const char *from)
 635 {
 636         const char *p1;
 637         char *out = NULL;
 638         char *to = NULL;
 639         size_t len = 0;
 640
 641         for (p1 = from; *p1; len++) {
 642                 if (is_hex(p1)) {
 643                         p1 += 3;
 644                 } else {
 645                         p1++;
 646                 }
 647         }
 648         len++;
 649
 650         to = talloc_array(ctx, char, len);
 651         if (!to) {
 652                 return NULL;
 653         }
 654
 655         for (out = to; *from;) {
 656                 if (is_hex(from)) {
 657                         *out++ = (hex2bin(from[1])<<4) | (hex2bin(from[2]));
 658                         from += 3;
 659                 } else {
 660                         *out++ = *from++;
 661                 }
 662         }
 663         *out = '\0';
 664         return to;
 665 }