external/bsd/openldap/dist/servers/slapd/ldapsync.c

   1 /* ldapsync.c -- LDAP Content Sync Routines */
   2 /* $OpenLDAP: pkg/ldap/servers/slapd/ldapsync.c,v 1.32.2.7 2008/02/11 23:26:44 kurt Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2003-2008 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_LUTIL_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 int
 170 slap_parse_sync_cookie(
 171         struct sync_cookie *cookie,
 172         void *memctx
 173 )
 174 {
 175         char *csn_ptr;
 176         char *csn_str;
 177         char *cval;
 178         char *next, *end;
 179         AttributeDescription *ad = slap_schema.si_ad_modifyTimestamp;
 180
 181         if ( cookie == NULL )
 182                 return -1;
 183
 184         if ( cookie->octet_str.bv_len <= STRLENOF( "rid=" ) )
 185                 return -1;
 186
 187         cookie->rid = -1;
 188         cookie->sid = -1;
 189         cookie->ctxcsn = NULL;
 190         cookie->sids = NULL;
 191         cookie->numcsns = 0;
 192
 193         end = cookie->octet_str.bv_val + cookie->octet_str.bv_len;
 194
 195         for ( next=cookie->octet_str.bv_val; next < end; ) {
 196                 if ( !strncmp( next, "rid=", STRLENOF("rid=") )) {
 197                         char *rid_ptr = next;
 198                         cookie->rid = strtol( &rid_ptr[ STRLENOF( "rid=" ) ], &next, 10 );
 199                         if ( next == rid_ptr ||
 200                                 next > end ||
 201                                 ( *next && *next != ',' ) ||
 202                                 cookie->rid < 0 ||
 203                                 cookie->rid > SLAP_SYNC_RID_MAX )
 204                         {
 205                                 return -1;
 206                         }
 207                         if ( *next == ',' ) {
 208                                 next++;
 209                         }
 210                         if ( !ad ) {
 211                                 break;
 212                         }
 213                         continue;
 214                 }
 215                 if ( !strncmp( next, "sid=", STRLENOF("sid=") )) {
 216                         char *sid_ptr = next;
 217                         sid_ptr = next;
 218                         cookie->sid = strtol( &sid_ptr[ STRLENOF( "sid=" ) ], &next, 16 );
 219                         if ( next == sid_ptr ||
 220                                 next > end ||
 221                                 ( *next && *next != ',' ) ||
 222                                 cookie->sid < 0 ||
 223                                 cookie->sid > SLAP_SYNC_SID_MAX )
 224                         {
 225                                 return -1;
 226                         }
 227                         if ( *next == ',' ) {
 228                                 next++;
 229                         }
 230                         continue;
 231                 }
 232                 if ( !strncmp( next, "csn=", STRLENOF("csn=") )) {
 233                         slap_syntax_validate_func *validate;
 234                         struct berval stamp;
 235
 236                         next += STRLENOF("csn=");
 237                         while ( next < end ) {
 238                                 csn_str = next;
 239                                 /* FIXME use csnValidate when it gets implemented */
 240                                 csn_ptr = strchr( csn_str, '#' );
 241                                 if ( !csn_ptr || csn_ptr > end )
 242                                         break;
 243                                 /* ad will be NULL when called from main. we just
 244                                  * want to parse the rid then. But we still iterate
 245                                  * through the string to find the end.
 246                                  */
 247                                 if ( ad ) {
 248                                         stamp.bv_val = csn_str;
 249                                         stamp.bv_len = csn_ptr - csn_str;
 250                                         validate = ad->ad_type->sat_syntax->ssyn_validate;
 251                                         if ( validate( ad->ad_type->sat_syntax, &stamp )
 252                                                 != LDAP_SUCCESS )
 253                                                 break;
 254                                 }
 255                                 cval = strchr( csn_ptr, ';' );
 256                                 if ( !cval )
 257                                         cval = strchr(csn_ptr, ',' );
 258                                 if ( cval )
 259                                         stamp.bv_len = cval - csn_str;
 260                                 else
 261                                         stamp.bv_len = end - csn_str;
 262                                 if ( ad ) {
 263                                         struct berval bv;
 264                                         ber_dupbv_x( &bv, &stamp, memctx );
 265                                         ber_bvarray_add_x( &cookie->ctxcsn, &bv, memctx );
 266                                         cookie->numcsns++;
 267                                 }
 268                                 if ( cval ) {
 269                                         next = cval + 1;
 270                                         if ( *cval != ';' )
 271                                                 break;
 272                                 } else {
 273                                         next = end;
 274                                         break;
 275                                 }
 276                         }
 277                         continue;
 278                 }
 279                 next++;
 280         }
 281         if ( cookie->numcsns ) {
 282                 cookie->sids = slap_parse_csn_sids( cookie->ctxcsn, cookie->numcsns,
 283                         memctx );
 284         }
 285         return 0;
 286 }
 287
 288 int
 289 slap_init_sync_cookie_ctxcsn(
 290         struct sync_cookie *cookie
 291 )
 292 {
 293         char csnbuf[ LDAP_LUTIL_CSNSTR_BUFSIZE + 4 ];
 294         struct berval octet_str = BER_BVNULL;
 295         struct berval ctxcsn = BER_BVNULL;
 296
 297         if ( cookie == NULL )
 298                 return -1;
 299
 300         octet_str.bv_len = snprintf( csnbuf, LDAP_LUTIL_CSNSTR_BUFSIZE + 4,
 301                                         "csn=%4d%02d%02d%02d%02d%02dZ#%06x#%02x#%06x",
 302                                         1900, 1, 1, 0, 0, 0, 0, 0, 0 );
 303         octet_str.bv_val = csnbuf;
 304         ch_free( cookie->octet_str.bv_val );
 305         ber_dupbv( &cookie->octet_str, &octet_str );
 306
 307         ctxcsn.bv_val = octet_str.bv_val + 4;
 308         ctxcsn.bv_len = octet_str.bv_len - 4;
 309         cookie->ctxcsn = NULL;
 310         value_add_one( &cookie->ctxcsn, &ctxcsn );
 311         cookie->numcsns = 1;
 312         cookie->sid = -1;
 313
 314         return 0;
 315 }
 316
 317 struct sync_cookie *
 318 slap_dup_sync_cookie(
 319         struct sync_cookie *dst,
 320         struct sync_cookie *src
 321 )
 322 {
 323         struct sync_cookie *new;
 324         int i;
 325
 326         if ( src == NULL )
 327                 return NULL;
 328
 329         if ( dst ) {
 330                 ber_bvarray_free( dst->ctxcsn );
 331                 dst->ctxcsn = NULL;
 332                 dst->sids = NULL;
 333                 ch_free( dst->octet_str.bv_val );
 334                 BER_BVZERO( &dst->octet_str );
 335                 new = dst;
 336         } else {
 337                 new = ( struct sync_cookie * )
 338                                 ch_calloc( 1, sizeof( struct sync_cookie ));
 339         }
 340
 341         new->rid = src->rid;
 342         new->sid = src->sid;
 343         new->numcsns = src->numcsns;
 344
 345         if ( src->numcsns ) {
 346                 if ( ber_bvarray_dup_x( &new->ctxcsn, src->ctxcsn, NULL )) {
 347                         if ( !dst ) {
 348                                 ch_free( new );
 349                         }
 350                         return NULL;
 351                 }
 352                 new->sids = ch_malloc( src->numcsns * sizeof(int) );
 353                 for (i=0; i<src->numcsns; i++)
 354                         new->sids[i] = src->sids[i];
 355         }
 356
 357         if ( !BER_BVISNULL( &src->octet_str )) {
 358                 ber_dupbv( &new->octet_str, &src->octet_str );
 359         }
 360
 361         return new;
 362 }
 363