git.sur5r.net Git - openldap/blob - servers/slapd/overlays/translucent.c

   1 /* Copyright 2004, Symas Corporation.
   2  * All Rights Reserved.
   3  */
   4
   5 #include "portable.h"
   6
   7 #ifdef SLAPD_OVER_TRANSLUCENT
   8
   9 #include <stdio.h>
  10
  11 #include <ac/string.h>
  12 #include <ac/socket.h>
  13
  14 #include "slap.h"
  15
  16 /* config block */
  17
  18 typedef struct translucent_configuration {
  19         int debug;
  20         int strict;
  21         int no_add;
  22         int glue;
  23 } translucent_configuration;
  24
  25 /* stack of captive backends */
  26
  27 typedef struct overlay_stack {
  28         BackendInfo *info;                      /* captive backend */
  29         void *private;                          /* local backend_private */
  30         translucent_configuration *config;      /* our_private: configuration */
  31 } overlay_stack;
  32
  33 /* for translucent_init() */
  34
  35 static slap_overinst translucent;
  36
  37 /*
  38 ** glue_parent()
  39 **      call syncrepl_add_glue() with the parent suffix;
  40 **
  41 */
  42
  43 static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
  44
  45 void glue_parent(Operation *op) {
  46         Operation nop = *op;
  47         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
  48         struct berval dn = { 0, NULL };
  49         char *odn = op->o_req_ndn.bv_val;
  50         Attribute *a;
  51         Entry *e;
  52         int idn, ldn;
  53
  54         /* tis more work to use strchr() for a berval... */
  55         for(idn = 0; odn[idn] && odn[idn] != ','; idn++);
  56         if(!idn || !odn[idn]) return;   /* because you never know */
  57         idn++;
  58         ldn = dn.bv_len = op->o_req_ndn.bv_len - idn;
  59         dn.bv_val = ch_malloc(ldn + 1);
  60         strcpy(dn.bv_val, odn + idn);
  61
  62         Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", dn.bv_val, 0, 0);
  63
  64         e = ch_calloc(1, sizeof(Entry));
  65         e->e_id = NOID;
  66         ber_dupbv(&e->e_name, &dn);
  67         ber_dupbv(&e->e_nname, &dn);
  68
  69         a = ch_calloc(1, sizeof(Attribute));
  70         a->a_desc = slap_schema.si_ad_objectClass;
  71         a->a_vals = ch_malloc(sizeof(struct berval) * 3);
  72         ber_dupbv(&a->a_vals[0], &glue[0]);
  73         ber_dupbv(&a->a_vals[1], &glue[1]);
  74         ber_dupbv(&a->a_vals[2], &glue[2]);
  75         a->a_nvals = a->a_vals;
  76         a->a_next = e->e_attrs;
  77         e->e_attrs = a;
  78
  79         a = ch_calloc(1, sizeof(Attribute));
  80         a->a_desc = slap_schema.si_ad_structuralObjectClass;
  81         a->a_vals = ch_malloc(sizeof(struct berval) * 2);
  82         ber_dupbv(&a->a_vals[0], &glue[1]);
  83         ber_dupbv(&a->a_vals[1], &glue[2]);
  84         a->a_nvals = a->a_vals;
  85         a->a_next = e->e_attrs;
  86         e->e_attrs = a;
  87
  88         nop.o_req_dn = dn;
  89         nop.o_req_ndn = dn;
  90         nop.ora_e = e;
  91         nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
  92
  93         syncrepl_add_glue(&nop, e);
  94         return;
  95 }
  96
  97 /*
  98 ** dup_bervarray()
  99 **      copy a BerVarray;
 100 */
 101
 102 BerVarray dup_bervarray(BerVarray b) {
 103         int i, len;
 104         BerVarray nb;
 105         for(len = 0; b[len].bv_val; len++);
 106         nb = ch_malloc((len+1) * sizeof(BerValue));
 107         for(i = 0; i < len; i++) ber_dupbv(&nb[i], &b[i]);
 108         nb[len].bv_val = NULL;
 109         nb[len].bv_len = 0;
 110         return(nb);
 111 }
 112
 113 /*
 114 ** free_attr_chain()
 115 **      free only the Attribute*, not the contents;
 116 **
 117 */
 118 void free_attr_chain(Attribute *a) {
 119         Attribute *ax;
 120         for(ax = NULL; a; a = a->a_next) {
 121                 if(ax) ch_free(ax);
 122                 ax = a;
 123         }
 124         return;
 125 }
 126
 127 /*
 128 ** translucent_add()
 129 **      if not bound as root, send ACCESS error;
 130 **      if config.glue, glue_parent();
 131 **      return CONTINUE;
 132 **
 133 */
 134
 135 static int translucent_add(Operation *op, SlapReply *rs) {
 136         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 137         overlay_stack *ov = on->on_bi.bi_private;
 138         Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
 139                 op->o_req_dn.bv_val, 0, 0);
 140         if(!be_isroot(op)) {
 141                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 142                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 143                         "user modification of overlay database not permitted");
 144                 return(rs->sr_err);
 145         }
 146         if(!ov->config->glue) glue_parent(op);
 147         return(SLAP_CB_CONTINUE);
 148 }
 149
 150 /*
 151 ** translucent_modrdn()
 152 **      if not bound as root, send ACCESS error;
 153 **      if !config.glue, glue_parent();
 154 **      else return CONTINUE;
 155 **
 156 */
 157
 158 static int translucent_modrdn(Operation *op, SlapReply *rs) {
 159         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 160         overlay_stack *ov = on->on_bi.bi_private;
 161         Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
 162                 op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
 163         if(!be_isroot(op)) {
 164                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 165                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 166                         "user modification of overlay database not permitted");
 167                 return(rs->sr_err);
 168         }
 169         if(!ov->config->glue) glue_parent(op);
 170         return(SLAP_CB_CONTINUE);
 171 }
 172
 173 /*
 174 ** translucent_delete()
 175 **      if not bound as root, send ACCESS error;
 176 **      else return CONTINUE;
 177 **
 178 */
 179
 180 static int translucent_delete(Operation *op, SlapReply *rs) {
 181         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 182         Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
 183                 op->o_req_dn.bv_val, 0, 0);
 184         if(!be_isroot(op)) {
 185                 op->o_bd->bd_info = (BackendInfo *) on->on_info;
 186                 send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
 187                         "user modification of overlay database not permitted");
 188                 return(rs->sr_err);
 189         }
 190         return(SLAP_CB_CONTINUE);
 191 }
 192
 193 /*
 194 ** translucent_modify()
 195 **      modify in local backend if exists in both;
 196 **      otherwise, add to local backend;
 197 **      fail if not defined in captive backend;
 198 **
 199 */
 200
 201 static int translucent_modify(Operation *op, SlapReply *rs) {
 202         SlapReply nrs = { REP_RESULT };
 203         Operation nop = *op;
 204
 205         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 206         overlay_stack *ov = on->on_bi.bi_private;
 207         translucent_configuration *cf = ov->config;
 208         void *private = op->o_bd->be_private;
 209         Entry ne, *e, *re = NULL;
 210         Attribute *a, *ax;
 211         Modifications *m, *mm;
 212         int del, rc, erc = 0;
 213
 214         Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
 215                 op->o_req_dn.bv_val, 0, 0);
 216
 217 /*
 218 ** fetch entry from the captive backend;
 219 ** if it did not exist, fail;
 220 ** release it, if captive backend supports this;
 221 **
 222 */
 223
 224         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 225         op->o_bd->be_private = ov->private;
 226         rc = ov->info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
 227         op->o_bd->be_private = private;
 228
 229         /* if(ov->config->no_add && (!re || rc != LDAP_SUCCESS)) */
 230         if(!re || rc != LDAP_SUCCESS) {
 231                 send_ldap_error(op, rs, LDAP_NO_SUCH_OBJECT,
 232                         "attempt to modify nonexistent local record");
 233                 return(rs->sr_err);
 234         }
 235
 236 /*
 237 ** fetch entry from local backend;
 238 ** if it exists:
 239 **      foreach Modification:
 240 **          if attr not present in local:
 241 **              if Mod == LDAP_MOD_DELETE:
 242 **                  if remote attr not present, return NO_SUCH;
 243 **                  if remote attr present, drop this Mod;
 244 **              else force this Mod to LDAP_MOD_ADD;
 245 **      return CONTINUE;
 246 **
 247 */
 248
 249         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
 250
 251         if(e && rc == LDAP_SUCCESS) {
 252                 Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
 253                 for(m = op->orm_modlist; m; m = m->sml_next) {
 254                         for(a = e->e_attrs; a; a = a->a_next)
 255                                 if(a->a_desc == m->sml_desc) break;
 256                         if(a) continue;         /* found local attr */
 257                         if(m->sml_op == LDAP_MOD_DELETE) {
 258                                 for(a = re->e_attrs; a; a = a->a_next)
 259                                         if(a->a_desc == m->sml_desc) break;
 260                                 /* not found remote attr */
 261                                 if(!a) {
 262                                         erc = LDAP_NO_SUCH_ATTRIBUTE;
 263                                         goto release;
 264                                 }
 265                                 if(ov->config->strict) {
 266                                         erc = LDAP_CONSTRAINT_VIOLATION;
 267                                         goto release;
 268                                 }
 269                                 Debug(LDAP_DEBUG_TRACE,
 270                                         "=> translucent_modify: silently dropping delete: %s\n",
 271                                         m->sml_desc->ad_cname.bv_val, 0, 0);
 272                                 for(mm = op->orm_modlist; mm->sml_next != m; mm = mm->sml_next);
 273                                 mm->sml_next = m->sml_next;
 274                                 mm = m;
 275                                 m = m->sml_next;
 276                                 mm->sml_next = NULL;            /* hack */
 277                                 slap_mods_free(mm);
 278                                 if(m) continue;
 279                         }
 280                         m->sml_op = LDAP_MOD_ADD;
 281                 }
 282                 erc = SLAP_CB_CONTINUE;
 283 release:
 284                 if(re) {
 285                         op->o_bd->be_private = ov->private;
 286                         if(ov->info->bi_entry_release_rw)
 287                                 ov->info->bi_entry_release_rw(op, re, 0);
 288                         else
 289                                 entry_free(re);
 290                         op->o_bd->be_private = private;
 291                 }
 292                 be_entry_release_r(op, e);
 293                 if(erc == SLAP_CB_CONTINUE) {
 294                         op->o_bd->bd_info = (BackendInfo *) on;
 295                         return(erc);
 296                 } else if(erc) {
 297                         send_ldap_error(op, rs, erc,
 298                                 "attempt to delete nonexistent attribute");
 299                         return(erc);
 300                 }
 301         }
 302
 303 /*
 304 ** foreach Modification:
 305 **      if MOD_ADD or MOD_REPLACE, add Attribute;
 306 ** if no Modifications were suitable:
 307 **      if config.strict, throw CONSTRAINT_VIOLATION;
 308 **      else, return early SUCCESS;
 309 ** fabricate Entry with new Attribute chain;
 310 ** glue_parent() for this Entry;
 311 ** call bi_op_add() in local backend;
 312 **
 313 */
 314
 315         Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
 316         a = NULL;
 317         for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
 318                 if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
 319                    ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
 320                         Debug(LDAP_DEBUG_ANY,
 321                                 "=> translucent_modify: silently dropped modification(%d): %s\n",
 322                                 m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
 323                         if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
 324                         continue;
 325                 }
 326                 a = ch_calloc(1, sizeof(Attribute));
 327                 a->a_desc  = m->sml_desc;
 328                 a->a_vals  = m->sml_values;
 329                 a->a_nvals = m->sml_nvalues;
 330                 a->a_next  = ax;
 331                 ax = a;
 332         }
 333
 334         if(del && ov->config->strict) {
 335                 free_attr_chain(a);
 336                 send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 337                         "attempt to delete attributes from local database");
 338                 return(rs->sr_err);
 339         }
 340
 341         if(!ax) {
 342                 if(ov->config->strict) {
 343                         send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
 344                                 "modification contained other than ADD or REPLACE");
 345                         return(rs->sr_err);
 346                 }
 347                 op->o_bd->bd_info = (BackendInfo *) on;
 348                 /* rs->sr_text = "no valid modification found"; */
 349                 rs->sr_err = LDAP_SUCCESS;
 350                 send_ldap_result(op, rs);
 351                 return(rs->sr_err);
 352         }
 353
 354         ne.e_id         = NOID;
 355         ne.e_name       = op->o_req_dn;
 356         ne.e_nname      = op->o_req_ndn;
 357         ne.e_attrs      = a;
 358         ne.e_ocflags    = 0;
 359         ne.e_bv.bv_len  = 0;
 360         ne.e_bv.bv_val  = NULL;
 361         ne.e_private    = NULL;
 362
 363         nop.o_tag       = LDAP_REQ_ADD;
 364         nop.oq_add.rs_e = &ne;
 365
 366         op->o_bd->bd_info = (BackendInfo *) on;
 367         glue_parent(&nop);
 368
 369         rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
 370         free_attr_chain(a);
 371
 372         return(rc);
 373 }
 374
 375 static int translucent_compare(Operation *op, SlapReply *rs) {
 376         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 377         overlay_stack *ov = on->on_bi.bi_private;
 378         void *private = op->o_bd->be_private;
 379         translucent_configuration *cf = ov->config;
 380
 381         AttributeAssertion *ava = op->orc_ava;
 382         Attribute *a, *an, *ra, *as = NULL;
 383         Entry *e, *ee, *re;
 384         int rc;
 385
 386         Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
 387                 op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
 388
 389 /*
 390 ** if the local backend has an entry for this attribute:
 391 **      CONTINUE and let it do the compare;
 392 **
 393 */
 394
 395         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 396         rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e);
 397         if(e && rc == LDAP_SUCCESS) {
 398                 be_entry_release_r(op, e);
 399                 op->o_bd->bd_info = (BackendInfo *) on;
 400                 return(SLAP_CB_CONTINUE);
 401         }
 402
 403 /*
 404 ** call compare() in the captive backend;
 405 ** return the result;
 406 **
 407 */
 408
 409         op->o_bd->be_private = ov->private;
 410         rc = ov->info->bi_op_compare(op, rs);
 411         op->o_bd->be_private = private;
 412         op->o_bd->bd_info = (BackendInfo *) on;
 413         return(rc);
 414 }
 415
 416 /*
 417 ** translucent_search_cb()
 418 **      merge local data with the search result
 419 **
 420 */
 421
 422 static int translucent_search_cb(Operation *op, SlapReply *rs) {
 423         slap_overinst *on;
 424         Entry *e, *re = NULL;
 425         Attribute *a, *ax, *an, *as = NULL;
 426         BerVarray b, bx;
 427         void *private;
 428         int i, rc, size;
 429
 430         if(!op || !rs || rs->sr_type != REP_SEARCH || !rs->sr_entry)
 431                 return(SLAP_CB_CONTINUE);
 432
 433         Debug(LDAP_DEBUG_TRACE, "==> tranclucent_search_cb: %s\n",
 434                 rs->sr_entry->e_name.bv_val, 0, 0);
 435
 436         on = (slap_overinst *) op->o_bd->bd_info;
 437         op->o_bd->bd_info = (BackendInfo *) on->on_info;
 438
 439         private = op->o_bd->be_private;
 440         op->o_bd->be_private = op->o_callback->sc_private;
 441
 442         rc = be_entry_get_rw(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &e);
 443
 444 /*
 445 ** if we got an entry from local backend:
 446 **      make a copy of this search result;
 447 **      foreach local attr:
 448 **              foreach search result attr:
 449 **                      if match, result attr with local attr;
 450 **                      if new local, add to list;
 451 **      append new local attrs to search result;
 452 **
 453 */
 454
 455         if(e && rc == LDAP_SUCCESS) {
 456                 re = entry_dup(rs->sr_entry);
 457                 for(ax = e->e_attrs; ax; ax = ax->a_next) {
 458 #if 0
 459                         if(is_at_operational(ax->a_desc->ad_type)) continue;
 460 #endif
 461                         for(a = re->e_attrs; a; a = a->a_next) {
 462                                 if(a->a_desc == ax->a_desc) {
 463                                         if(a->a_vals != a->a_nvals)
 464                                                 ber_bvarray_free(a->a_nvals);
 465                                         ber_bvarray_free(a->a_vals);
 466                                         a->a_vals = dup_bervarray(ax->a_vals);
 467                                         a->a_nvals = (ax->a_vals == ax->a_nvals) ?
 468                                                 a->a_vals : dup_bervarray(ax->a_nvals);
 469                                         break;
 470                                 }
 471                         }
 472                         if(a) continue;
 473                         an = attr_dup(ax);
 474                         an->a_next = as;
 475                         as = an;
 476                 }
 477                 be_entry_release_r(op, e);
 478
 479                 /* literally append, so locals are always last */
 480                 if(as) {
 481                         if(re->e_attrs) {
 482                                 for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
 483                                 ax->a_next = as;
 484                         } else {
 485                                 re->e_attrs = as;
 486                         }
 487                 }
 488                 rs->sr_entry = re;
 489                 rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
 490         }
 491
 492         op->o_bd->be_private = private;
 493         op->o_bd->bd_info = (BackendInfo *) on;
 494
 495         return(SLAP_CB_CONTINUE);
 496 }
 497
 498 /*
 499 ** translucent_search()
 500 **      search via captive backend;
 501 **      override results with any local data;
 502 **
 503 */
 504
 505 static int translucent_search(Operation *op, SlapReply *rs) {
 506         Operation nop = *op;
 507
 508         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 509         slap_callback cb = { NULL, NULL, NULL, NULL };
 510         overlay_stack *ov = on->on_bi.bi_private;
 511         translucent_configuration *cf = ov->config;
 512         void *private = op->o_bd->be_private;
 513         int rc;
 514
 515         Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
 516                 op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
 517         cb.sc_response = (slap_response *) translucent_search_cb;
 518         cb.sc_private = private;
 519
 520         cb.sc_next = nop.o_callback;
 521         nop.o_callback = &cb;
 522
 523         op->o_bd->be_private = ov->private;
 524         rc = ov->info->bi_op_search(&nop, rs);
 525         op->o_bd->be_private = private;
 526
 527         return(rs->sr_err);
 528 }
 529
 530
 531 /*
 532 ** translucent_bind()
 533 **      pass bind request to captive backend;
 534 **
 535 */
 536
 537 static int translucent_bind(Operation *op, SlapReply *rs) {
 538         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 539         overlay_stack *ov = on->on_bi.bi_private;
 540         void *private = op->o_bd->be_private;
 541         int rc = 0;
 542
 543         Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
 544                 op->o_req_dn.bv_val, op->orb_method, 0);
 545
 546         op->o_bd->be_private = ov->private;
 547         rc = ov->info->bi_op_bind(op, rs);
 548         op->o_bd->be_private = private;
 549
 550         return(rc);
 551 }
 552
 553 /*
 554 ** translucent_config()
 555 **      pass config directives to captive backend;
 556 **      parse unrecognized directives ourselves;
 557 **
 558 */
 559
 560 static int translucent_config(
 561         BackendDB       *be,
 562         const char      *fname,
 563         int             lineno,
 564         int             argc,
 565         char            **argv
 566 )
 567 {
 568         slap_overinst *on = (slap_overinst *) be->bd_info;
 569         overlay_stack *ov = on->on_bi.bi_private;
 570         void *private = be->be_private;
 571         int rc;
 572
 573         /* "this should never happen" */
 574         if(!ov->info) {
 575                 fprintf(stderr, "fatal: captive backend not initialized");
 576                 return(1);
 577         }
 578
 579         be->be_private = ov->private;
 580         rc = ov->info->bi_db_config ? ov->info->bi_db_config(be, fname, lineno, argc, argv) : 0;
 581         be->be_private = private;
 582
 583         /* pass okay or error up, SLAP_CONF_UNKNOWN might be ours */
 584         if(rc == 0 || rc == 1) return(rc);
 585
 586         rc = 0;
 587         if(!strcasecmp(*argv, "translucent_strict")) {
 588                 ov->config->strict++;
 589         } else if(!strcasecmp(*argv, "translucent_no_add")) {
 590                 ov->config->no_add++;
 591         } else if(!strcasecmp(*argv, "translucent_no_glue")) {
 592                 ov->config->glue++;
 593         } else if(!strcasecmp(*argv, "translucent_debug")) {
 594                 if(argc == 1) {
 595                         ov->config->debug = 0xFFFF;
 596                         rc = 0;
 597                 } else if(argc == 2) {
 598                         ov->config->debug = atoi(argv[1]);
 599                         rc = 0;
 600                 } else {
 601                         fprintf(stderr, "%s: line %d: too many arguments (%d) to debug\n",
 602                                 fname, lineno, argc);
 603                         rc = 1;
 604                 }
 605         } else {
 606                 fprintf(stderr, "%s: line %d: unknown keyword %s\n",
 607                         fname, lineno, *argv);
 608                 rc = SLAP_CONF_UNKNOWN;
 609         }
 610         return(rc);
 611 }
 612
 613 /*
 614 ** translucent_db_init()
 615 **      initialize the captive backend;
 616 **
 617 */
 618
 619 static int translucent_db_init(BackendDB *be) {
 620         slap_overinst *on = (slap_overinst *) be->bd_info;
 621         void *private = be->be_private;
 622         overlay_stack *ov;
 623         int rc;
 624
 625         Debug(LDAP_DEBUG_TRACE, "==> translucent_init\n", 0, 0, 0);
 626
 627         ov = ch_calloc(1, sizeof(overlay_stack));
 628         ov->config = ch_calloc(1, sizeof(translucent_configuration));
 629         ov->info = backend_info("ldap");
 630
 631         if(!ov->info) {
 632                 Debug(LDAP_DEBUG_ANY, "translucent: backend_info failed!\n", 0, 0, 0);
 633                 return(1);
 634         }
 635
 636         /* forcibly disable schema checking on the local backend */
 637         SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
 638
 639         be->be_private = NULL;
 640         rc = ov->info->bi_db_init ? ov->info->bi_db_init(be) : 0;
 641
 642         if(rc) Debug(LDAP_DEBUG_TRACE,
 643                 "translucent: bi_db_init() returned error %d\n", rc, 0, 0);
 644
 645         ov->private = be->be_private;
 646         be->be_private = private;
 647         on->on_bi.bi_private = ov;
 648         return(rc);
 649 }
 650
 651 /*
 652 ** translucent_open()
 653 **      if the captive backend has an open() method, call it;
 654 **
 655 */
 656
 657 static int translucent_open(BackendDB *be) {
 658         slap_overinst *on = (slap_overinst *) be->bd_info;
 659         overlay_stack *ov = on->on_bi.bi_private;
 660         void *private = be->be_private;
 661         int rc;
 662
 663         /* "should never happen" */
 664         if(!ov->info) {
 665                 Debug(LDAP_DEBUG_ANY, "translucent_open() called with bad ov->info\n", 0, 0, 0);
 666                 return(LDAP_OTHER);
 667         }
 668
 669         Debug(LDAP_DEBUG_TRACE, "translucent_open\n", 0, 0, 0);
 670
 671         be->be_private = ov->private;
 672         rc = ov->info->bi_db_open ? ov->info->bi_db_open(be) : 0;
 673         be->be_private = private;
 674
 675         if(rc) Debug(LDAP_DEBUG_TRACE,
 676                 "translucent: bi_db_open() returned error %d\n", rc, 0, 0);
 677
 678         return(rc);
 679 }
 680
 681 /*
 682 ** translucent_close()
 683 **      if the captive backend has a close() method, call it;
 684 **      free any config data;
 685 **
 686 */
 687
 688 static int translucent_close(BackendDB *be) {
 689         slap_overinst *on = (slap_overinst *) be->bd_info;
 690         overlay_stack *ov = on->on_bi.bi_private;
 691         translucent_configuration *cf = ov->config;
 692         void *private = be->be_private;
 693         int rc;
 694
 695         be->be_private = ov->private;
 696         rc = (ov->info && ov->info->bi_db_close) ? ov->info->bi_db_close(be) : 0;
 697         be->be_private = private;
 698         if(ov->config) ch_free(ov->config);
 699         ch_free(ov);
 700         return(rc);
 701 }
 702
 703 /*
 704 ** translucent_init()
 705 **      initialize the slap_overinst with our entry points;
 706 **
 707 */
 708
 709 int translucent_init() {
 710
 711         translucent.on_bi.bi_type       = "translucent";
 712         translucent.on_bi.bi_db_init    = translucent_db_init;
 713         translucent.on_bi.bi_db_config  = translucent_config;
 714         translucent.on_bi.bi_db_open    = translucent_open;
 715         translucent.on_bi.bi_db_close   = translucent_close;
 716         translucent.on_bi.bi_op_bind    = translucent_bind;
 717         translucent.on_bi.bi_op_add     = translucent_add;
 718         translucent.on_bi.bi_op_modify  = translucent_modify;
 719         translucent.on_bi.bi_op_modrdn  = translucent_modrdn;
 720         translucent.on_bi.bi_op_delete  = translucent_delete;
 721         translucent.on_bi.bi_op_search  = translucent_search;
 722         translucent.on_bi.bi_op_compare = translucent_compare;
 723
 724         return(overlay_register(&translucent));
 725 }
 726
 727 #if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
 728 int init_module(int argc, char *argv[]) {
 729         return translucent_init();
 730 }
 731 #endif
 732
 733 #endif /* SLAPD_OVER_TRANSLUCENT */
 734