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

   1 /* ldapsync.c -- LDAP Content Sync Routines */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2003-2011 The OpenLDAP Foundation.
   6  * Portions Copyright 2003 IBM Corporation.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17
  18 #include "portable.h"
  19
  20 #include <stdio.h>
  21
  22 #include <ac/string.h>
  23 #include <ac/socket.h>
  24
  25 #include "lutil.h"
  26 #include "slap.h"
  27 #include "../../libraries/liblber/lber-int.h" /* get ber_strndup() */
  28 #include "lutil_ldap.h"
  29
  30 struct slap_sync_cookie_s slap_sync_cookie =
  31         LDAP_STAILQ_HEAD_INITIALIZER( slap_sync_cookie );
  32
  33 void
  34 slap_compose_sync_cookie(
  35         Operation *op,
  36         struct berval *cookie,
  37         BerVarray csn,
  38         int rid,
  39         int sid )
  40 {
  41         int len, numcsn = 0;
  42
  43         if ( csn ) {
  44                 for (; !BER_BVISNULL( &csn[numcsn] ); numcsn++);
  45         }
  46
  47         if ( numcsn == 0 || rid == -1 ) {
  48                 char cookiestr[ LDAP_PVT_CSNSTR_BUFSIZE + 20 ];
  49                 if ( rid == -1 ) {
  50                         cookiestr[0] = '\0';
  51                         len = 0;
  52                 } else {
  53                         len = snprintf( cookiestr, sizeof( cookiestr ),
  54                                         "rid=%03d", rid );
  55                         if ( sid >= 0 ) {
  56                                 len += sprintf( cookiestr+len, ",sid=%03x", sid );
  57                         }
  58                 }
  59                 ber_str2bv_x( cookiestr, len, 1, cookie,
  60                         op ? op->o_tmpmemctx : NULL );
  61         } else {
  62                 char *ptr;
  63                 int i;
  64
  65                 len = 0;
  66                 for ( i=0; i<numcsn; i++)
  67                         len += csn[i].bv_len + 1;
  68
  69                 len += STRLENOF("rid=123,csn=");
  70                 if ( sid >= 0 )
  71                         len += STRLENOF("sid=xxx,");
  72
  73                 cookie->bv_val = slap_sl_malloc( len, op ? op->o_tmpmemctx : NULL );
  74
  75                 len = sprintf( cookie->bv_val, "rid=%03d,", rid );
  76                 ptr = cookie->bv_val + len;
  77                 if ( sid >= 0 ) {
  78                         ptr += sprintf( ptr, "sid=%03x,", sid );
  79                 }
  80                 ptr = lutil_strcopy( ptr, "csn=" );
  81                 for ( i=0; i<numcsn; i++) {
  82                         ptr = lutil_strncopy( ptr, csn[i].bv_val, csn[i].bv_len );
  83                         *ptr++ = ';';
  84                 }
  85                 ptr--;
  86                 *ptr = '\0';
  87                 cookie->bv_len = ptr - cookie->bv_val;
  88         }
  89 }
  90
  91 void
  92 slap_sync_cookie_free(
  93         struct sync_cookie *cookie,
  94         int free_cookie
  95 )
  96 {
  97         if ( cookie == NULL )
  98                 return;
  99
 100         if ( cookie->sids ) {
 101                 ch_free( cookie->sids );
 102                 cookie->sids = NULL;
 103         }
 104
 105         if ( cookie->ctxcsn ) {
 106                 ber_bvarray_free( cookie->ctxcsn );
 107                 cookie->ctxcsn = NULL;
 108         }
 109         cookie->numcsns = 0;
 110         if ( !BER_BVISNULL( &cookie->octet_str )) {
 111                 ch_free( cookie->octet_str.bv_val );
 112                 BER_BVZERO( &cookie->octet_str );
 113         }
 114
 115         if ( free_cookie ) {
 116                 ch_free( cookie );
 117         }
 118
 119         return;
 120 }
 121
 122 int
 123 slap_parse_csn_sid( struct berval *csnp )
 124 {
 125         char *p, *q;
 126         struct berval csn = *csnp;
 127         int i;
 128
 129         p = ber_bvchr( &csn, '#' );
 130         if ( !p )
 131                 return -1;
 132         p++;
 133         csn.bv_len -= p - csn.bv_val;
 134         csn.bv_val = p;
 135
 136         p = ber_bvchr( &csn, '#' );
 137         if ( !p )
 138                 return -1;
 139         p++;
 140         csn.bv_len -= p - csn.bv_val;
 141         csn.bv_val = p;
 142
 143         q = ber_bvchr( &csn, '#' );
 144         if ( !q )
 145                 return -1;
 146
 147         csn.bv_len = q - p;
 148
 149         i = strtol( p, &q, 16 );
 150         if ( p == q || q != p + csn.bv_len || i < 0 || i > SLAP_SYNC_SID_MAX ) {
 151                 i = -1;
 152         }
 153
 154         return i;
 155 }
 156
 157 int *
 158 slap_parse_csn_sids( BerVarray csns, int numcsns, void *memctx )
 159 {
 160         int i, *ret;
 161
 162         ret = slap_sl_malloc( numcsns * sizeof(int), memctx );
 163         for ( i=0; i<numcsns; i++ ) {
 164                 ret[i] = slap_parse_csn_sid( &csns[i] );
 165         }
 166         return ret;
 167 }
 168
 169 static slap_mr_match_func sidsort_cmp;
 170
 171 static const MatchingRule sidsort_mr = {
 172         {},
 173         NULL,
 174         {},
 175         {},
 176         0,
 177         NULL, NULL, NULL, sidsort_cmp
 178 };
 179 static const AttributeType sidsort_at = {
 180         {},
 181         {},
 182         NULL, NULL, (MatchingRule *)&sidsort_mr,
 183         NULL, NULL, NULL, NULL, NULL, NULL, NULL, SLAP_AT_SORTED_VAL
 184 };
 185 static const AttributeDescription sidsort_ad = {
 186         NULL,
 187         (AttributeType *)&sidsort_at
 188 };
 189
 190 static int
 191 sidsort_cmp(
 192         int *matchp,
 193         slap_mask_t flags,
 194         Syntax *syntax,
 195         MatchingRule *mr,
 196         struct berval *b1,
 197         void *v2 )
 198 {
 199         struct berval *b2 = v2;
 200         *matchp = b1->bv_len - b2->bv_len;
 201         return LDAP_SUCCESS;
 202 }
 203
 204 /* sort CSNs by SID. Use a fake Attribute with our own
 205  * syntax and matching rule, which sorts the nvals by
 206  * bv_len order. Stuff our sids into the bv_len.
 207  */
 208 int
 209 slap_sort_csn_sids( BerVarray csns, int *sids, int numcsns, void *memctx )
 210 {
 211         Attribute a;
 212         const char *text;
 213         int i, rc;
 214
 215         a.a_desc = (AttributeDescription *)&sidsort_ad;
 216         a.a_nvals = slap_sl_malloc( numcsns * sizeof(struct berval), memctx );
 217         for ( i=0; i<numcsns; i++ ) {
 218                 a.a_nvals[i].bv_len = sids[i];
 219                 a.a_nvals[i].bv_val = NULL;
 220         }
 221         a.a_vals = csns;
 222         a.a_numvals = numcsns;
 223         a.a_flags = 0;
 224         rc = slap_sort_vals( (Modifications *)&a, &text, &i, memctx );
 225         for ( i=0; i<numcsns; i++ )
 226                 sids[i] = a.a_nvals[i].bv_len;
 227         slap_sl_free( a.a_nvals, memctx );
 228         return rc;
 229 }
 230
 231 int
 232 slap_parse_sync_cookie(
 233         struct sync_cookie *cookie,
 234         void *memctx
 235 )
 236 {
 237         char *csn_ptr;
 238         char *csn_str;
 239         char *cval;
 240         char *next, *end;
 241         AttributeDescription *ad = slap_schema.si_ad_entryCSN;
 242
 243         if ( cookie == NULL )
 244                 return -1;
 245
 246         if ( cookie->octet_str.bv_len <= STRLENOF( "rid=" ) )
 247                 return -1;
 248
 249         cookie->rid = -1;
 250         cookie->sid = -1;
 251         cookie->ctxcsn = NULL;
 252         cookie->sids = NULL;
 253         cookie->numcsns = 0;
 254
 255         end = cookie->octet_str.bv_val + cookie->octet_str.bv_len;
 256
 257         for ( next=cookie->octet_str.bv_val; next < end; ) {
 258                 if ( !strncmp( next, "rid=", STRLENOF("rid=") )) {
 259                         char *rid_ptr = next;
 260                         cookie->rid = strtol( &rid_ptr[ STRLENOF( "rid=" ) ], &next, 10 );
 261                         if ( next == rid_ptr ||
 262                                 next > end ||
 263                                 ( *next && *next != ',' ) ||
 264                                 cookie->rid < 0 ||
 265                                 cookie->rid > SLAP_SYNC_RID_MAX )
 266                         {
 267                                 return -1;
 268                         }
 269                         if ( *next == ',' ) {
 270                                 next++;
 271                         }
 272                         if ( !ad ) {
 273                                 break;
 274                         }
 275                         continue;
 276                 }
 277                 if ( !strncmp( next, "sid=", STRLENOF("sid=") )) {
 278                         char *sid_ptr = next;
 279                         sid_ptr = next;
 280                         cookie->sid = strtol( &sid_ptr[ STRLENOF( "sid=" ) ], &next, 16 );
 281                         if ( next == sid_ptr ||
 282                                 next > end ||
 283                                 ( *next && *next != ',' ) ||
 284                                 cookie->sid < 0 ||
 285                                 cookie->sid > SLAP_SYNC_SID_MAX )
 286                         {
 287                                 return -1;
 288                         }
 289                         if ( *next == ',' ) {
 290                                 next++;
 291                         }
 292                         continue;
 293                 }
 294                 if ( !strncmp( next, "csn=", STRLENOF("csn=") )) {
 295                         struct berval stamp;
 296
 297                         next += STRLENOF("csn=");
 298                         while ( next < end ) {
 299                                 csn_str = next;
 300                                 csn_ptr = strchr( csn_str, '#' );
 301                                 if ( !csn_ptr || csn_ptr > end )
 302                                         break;
 303                                 /* ad will be NULL when called from main. we just
 304                                  * want to parse the rid then. But we still iterate
 305                                  * through the string to find the end.
 306                                  */
 307                                 cval = strchr( csn_ptr, ';' );
 308                                 if ( !cval )
 309                                         cval = strchr(csn_ptr, ',' );
 310                                 if ( cval )
 311                                         stamp.bv_len = cval - csn_str;
 312                                 else
 313                                         stamp.bv_len = end - csn_str;
 314                                 if ( ad ) {
 315                                         struct berval bv;
 316                                         stamp.bv_val = csn_str;
 317                                         if ( ad->ad_type->sat_syntax->ssyn_validate(
 318                                                 ad->ad_type->sat_syntax, &stamp ) != LDAP_SUCCESS )
 319                                                 break;
 320                                         if ( ad->ad_type->sat_equality->smr_normalize(
 321                                                 SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 322                                                 ad->ad_type->sat_syntax,
 323                                                 ad->ad_type->sat_equality,
 324                                                 &stamp, &bv, memctx ) != LDAP_SUCCESS )
 325                                                 break;
 326                                         ber_bvarray_add_x( &cookie->ctxcsn, &bv, memctx );
 327                                         cookie->numcsns++;
 328                                 }
 329                                 if ( cval ) {
 330                                         next = cval + 1;
 331                                         if ( *cval != ';' )
 332                                                 break;
 333                                 } else {
 334                                         next = end;
 335                                         break;
 336                                 }
 337                         }
 338                         continue;
 339                 }
 340                 next++;
 341         }
 342         if ( cookie->numcsns ) {
 343                 cookie->sids = slap_parse_csn_sids( cookie->ctxcsn, cookie->numcsns,
 344                         memctx );
 345                 if ( cookie->numcsns > 1 )
 346                         slap_sort_csn_sids( cookie->ctxcsn, cookie->sids, cookie->numcsns, memctx );
 347         }
 348         return 0;
 349 }
 350
 351 int
 352 slap_init_sync_cookie_ctxcsn(
 353         struct sync_cookie *cookie
 354 )
 355 {
 356         char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE + 4 ];
 357         struct berval octet_str = BER_BVNULL;
 358         struct berval ctxcsn = BER_BVNULL;
 359
 360         if ( cookie == NULL )
 361                 return -1;
 362
 363         octet_str.bv_len = snprintf( csnbuf, LDAP_PVT_CSNSTR_BUFSIZE + 4,
 364                                         "csn=%4d%02d%02d%02d%02d%02dZ#%06x#%02x#%06x",
 365                                         1900, 1, 1, 0, 0, 0, 0, 0, 0 );
 366         octet_str.bv_val = csnbuf;
 367         ch_free( cookie->octet_str.bv_val );
 368         ber_dupbv( &cookie->octet_str, &octet_str );
 369
 370         ctxcsn.bv_val = octet_str.bv_val + 4;
 371         ctxcsn.bv_len = octet_str.bv_len - 4;
 372         cookie->ctxcsn = NULL;
 373         value_add_one( &cookie->ctxcsn, &ctxcsn );
 374         cookie->numcsns = 1;
 375         cookie->sid = -1;
 376
 377         return 0;
 378 }
 379
 380 struct sync_cookie *
 381 slap_dup_sync_cookie(
 382         struct sync_cookie *dst,
 383         struct sync_cookie *src
 384 )
 385 {
 386         struct sync_cookie *new;
 387         int i;
 388
 389         if ( src == NULL )
 390                 return NULL;
 391
 392         if ( dst ) {
 393                 ber_bvarray_free( dst->ctxcsn );
 394                 dst->ctxcsn = NULL;
 395                 dst->sids = NULL;
 396                 ch_free( dst->octet_str.bv_val );
 397                 BER_BVZERO( &dst->octet_str );
 398                 new = dst;
 399         } else {
 400                 new = ( struct sync_cookie * )
 401                                 ch_calloc( 1, sizeof( struct sync_cookie ));
 402         }
 403
 404         new->rid = src->rid;
 405         new->sid = src->sid;
 406         new->numcsns = src->numcsns;
 407
 408         if ( src->numcsns ) {
 409                 if ( ber_bvarray_dup_x( &new->ctxcsn, src->ctxcsn, NULL )) {
 410                         if ( !dst ) {
 411                                 ch_free( new );
 412                         }
 413                         return NULL;
 414                 }
 415                 new->sids = ch_malloc( src->numcsns * sizeof(int) );
 416                 for (i=0; i<src->numcsns; i++)
 417                         new->sids[i] = src->sids[i];
 418         }
 419
 420         if ( !BER_BVISNULL( &src->octet_str )) {
 421                 ber_dupbv( &new->octet_str, &src->octet_str );
 422         }
 423
 424         return new;
 425 }
 426