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-rw-r--r--servers/slapd/ldapsync.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/servers/slapd/ldapsync.c b/servers/slapd/ldapsync.c
new file mode 100644
index 0000000..3ba029f
--- /dev/null
+++ b/servers/slapd/ldapsync.c
@@ -0,0 +1,464 @@
+/* ldapsync.c -- LDAP Content Sync Routines */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2003 IBM Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "lutil.h"
+#include "slap.h"
+#include "../../libraries/liblber/lber-int.h" /* get ber_strndup() */
+#include "lutil_ldap.h"
+
+struct slap_sync_cookie_s slap_sync_cookie =
+ LDAP_STAILQ_HEAD_INITIALIZER( slap_sync_cookie );
+
+void
+slap_compose_sync_cookie(
+ Operation *op,
+ struct berval *cookie,
+ BerVarray csn,
+ int rid,
+ int sid )
+{
+ int len, numcsn = 0;
+
+ if ( csn ) {
+ for (; !BER_BVISNULL( &csn[numcsn] ); numcsn++);
+ }
+
+ if ( numcsn == 0 || rid == -1 ) {
+ char cookiestr[ LDAP_PVT_CSNSTR_BUFSIZE + 20 ];
+ if ( rid == -1 ) {
+ cookiestr[0] = '\0';
+ len = 0;
+ } else {
+ len = snprintf( cookiestr, sizeof( cookiestr ),
+ "rid=%03d", rid );
+ if ( sid >= 0 ) {
+ len += sprintf( cookiestr+len, ",sid=%03x", sid );
+ }
+ }
+ ber_str2bv_x( cookiestr, len, 1, cookie,
+ op ? op->o_tmpmemctx : NULL );
+ } else {
+ char *ptr;
+ int i;
+
+ len = 0;
+ for ( i=0; i<numcsn; i++)
+ len += csn[i].bv_len + 1;
+
+ len += STRLENOF("rid=123,csn=");
+ if ( sid >= 0 )
+ len += STRLENOF("sid=xxx,");
+
+ cookie->bv_val = slap_sl_malloc( len, op ? op->o_tmpmemctx : NULL );
+
+ len = sprintf( cookie->bv_val, "rid=%03d,", rid );
+ ptr = cookie->bv_val + len;
+ if ( sid >= 0 ) {
+ ptr += sprintf( ptr, "sid=%03x,", sid );
+ }
+ ptr = lutil_strcopy( ptr, "csn=" );
+ for ( i=0; i<numcsn; i++) {
+ ptr = lutil_strncopy( ptr, csn[i].bv_val, csn[i].bv_len );
+ *ptr++ = ';';
+ }
+ ptr--;
+ *ptr = '\0';
+ cookie->bv_len = ptr - cookie->bv_val;
+ }
+}
+
+void
+slap_sync_cookie_free(
+ struct sync_cookie *cookie,
+ int free_cookie
+)
+{
+ if ( cookie == NULL )
+ return;
+
+ if ( cookie->sids ) {
+ ch_free( cookie->sids );
+ cookie->sids = NULL;
+ }
+
+ if ( cookie->ctxcsn ) {
+ ber_bvarray_free( cookie->ctxcsn );
+ cookie->ctxcsn = NULL;
+ }
+ cookie->numcsns = 0;
+ if ( !BER_BVISNULL( &cookie->octet_str )) {
+ ch_free( cookie->octet_str.bv_val );
+ BER_BVZERO( &cookie->octet_str );
+ }
+
+ if ( free_cookie ) {
+ ch_free( cookie );
+ }
+
+ return;
+}
+
+int
+slap_parse_csn_sid( struct berval *csnp )
+{
+ char *p, *q;
+ struct berval csn = *csnp;
+ int i;
+
+ p = ber_bvchr( &csn, '#' );
+ if ( !p )
+ return -1;
+ p++;
+ csn.bv_len -= p - csn.bv_val;
+ csn.bv_val = p;
+
+ p = ber_bvchr( &csn, '#' );
+ if ( !p )
+ return -1;
+ p++;
+ csn.bv_len -= p - csn.bv_val;
+ csn.bv_val = p;
+
+ q = ber_bvchr( &csn, '#' );
+ if ( !q )
+ return -1;
+
+ csn.bv_len = q - p;
+
+ i = strtol( p, &q, 16 );
+ if ( p == q || q != p + csn.bv_len || i < 0 || i > SLAP_SYNC_SID_MAX ) {
+ i = -1;
+ }
+
+ return i;
+}
+
+int *
+slap_parse_csn_sids( BerVarray csns, int numcsns, void *memctx )
+{
+ int i, *ret;
+
+ ret = slap_sl_malloc( numcsns * sizeof(int), memctx );
+ for ( i=0; i<numcsns; i++ ) {
+ ret[i] = slap_parse_csn_sid( &csns[i] );
+ }
+ return ret;
+}
+
+static slap_mr_match_func sidsort_cmp;
+
+static const MatchingRule sidsort_mr = {
+ { 0 },
+ NULL,
+ { 0 },
+ { 0 },
+ 0,
+ NULL, NULL, NULL, sidsort_cmp
+};
+static const AttributeType sidsort_at = {
+ { 0 },
+ { 0 },
+ NULL, NULL, (MatchingRule *)&sidsort_mr,
+ NULL, NULL, NULL, NULL, NULL, NULL, NULL, SLAP_AT_SORTED_VAL
+};
+static const AttributeDescription sidsort_ad = {
+ NULL,
+ (AttributeType *)&sidsort_at
+};
+
+static int
+sidsort_cmp(
+ int *matchp,
+ slap_mask_t flags,
+ Syntax *syntax,
+ MatchingRule *mr,
+ struct berval *b1,
+ void *v2 )
+{
+ struct berval *b2 = v2;
+ *matchp = b1->bv_len - b2->bv_len;
+ return LDAP_SUCCESS;
+}
+
+/* sort CSNs by SID. Use a fake Attribute with our own
+ * syntax and matching rule, which sorts the nvals by
+ * bv_len order. Stuff our sids into the bv_len.
+ */
+int
+slap_sort_csn_sids( BerVarray csns, int *sids, int numcsns, void *memctx )
+{
+ Attribute a;
+ const char *text;
+ int i, rc;
+
+ a.a_desc = (AttributeDescription *)&sidsort_ad;
+ a.a_nvals = slap_sl_malloc( numcsns * sizeof(struct berval), memctx );
+ for ( i=0; i<numcsns; i++ ) {
+ a.a_nvals[i].bv_len = sids[i];
+ a.a_nvals[i].bv_val = NULL;
+ }
+ a.a_vals = csns;
+ a.a_numvals = numcsns;
+ a.a_flags = 0;
+ rc = slap_sort_vals( (Modifications *)&a, &text, &i, memctx );
+ for ( i=0; i<numcsns; i++ )
+ sids[i] = a.a_nvals[i].bv_len;
+ slap_sl_free( a.a_nvals, memctx );
+ return rc;
+}
+
+void
+slap_insert_csn_sids(
+ struct sync_cookie *ck,
+ int pos,
+ int sid,
+ struct berval *csn
+)
+{
+ int i;
+ ck->numcsns++;
+ ck->ctxcsn = ch_realloc( ck->ctxcsn,
+ (ck->numcsns+1) * sizeof(struct berval));
+ BER_BVZERO( &ck->ctxcsn[ck->numcsns] );
+ ck->sids = ch_realloc( ck->sids, ck->numcsns * sizeof(int));
+ for ( i = ck->numcsns-1; i > pos; i-- ) {
+ ck->ctxcsn[i] = ck->ctxcsn[i-1];
+ ck->sids[i] = ck->sids[i-1];
+ }
+ ck->sids[i] = sid;
+ ber_dupbv( &ck->ctxcsn[i], csn );
+}
+
+int
+slap_parse_sync_cookie(
+ struct sync_cookie *cookie,
+ void *memctx
+)
+{
+ char *csn_ptr;
+ char *csn_str;
+ char *cval;
+ char *next, *end;
+ AttributeDescription *ad = slap_schema.si_ad_entryCSN;
+
+ if ( cookie == NULL )
+ return -1;
+
+ if ( cookie->octet_str.bv_len <= STRLENOF( "rid=" ) )
+ return -1;
+
+ cookie->rid = -1;
+ cookie->sid = -1;
+ cookie->ctxcsn = NULL;
+ cookie->sids = NULL;
+ cookie->numcsns = 0;
+
+ end = cookie->octet_str.bv_val + cookie->octet_str.bv_len;
+
+ for ( next=cookie->octet_str.bv_val; next < end; ) {
+ if ( !strncmp( next, "rid=", STRLENOF("rid=") )) {
+ char *rid_ptr = next;
+ cookie->rid = strtol( &rid_ptr[ STRLENOF( "rid=" ) ], &next, 10 );
+ if ( next == rid_ptr ||
+ next > end ||
+ ( *next && *next != ',' ) ||
+ cookie->rid < 0 ||
+ cookie->rid > SLAP_SYNC_RID_MAX )
+ {
+ return -1;
+ }
+ if ( *next == ',' ) {
+ next++;
+ }
+ if ( !ad ) {
+ break;
+ }
+ continue;
+ }
+ if ( !strncmp( next, "sid=", STRLENOF("sid=") )) {
+ char *sid_ptr = next;
+ sid_ptr = next;
+ cookie->sid = strtol( &sid_ptr[ STRLENOF( "sid=" ) ], &next, 16 );
+ if ( next == sid_ptr ||
+ next > end ||
+ ( *next && *next != ',' ) ||
+ cookie->sid < 0 ||
+ cookie->sid > SLAP_SYNC_SID_MAX )
+ {
+ return -1;
+ }
+ if ( *next == ',' ) {
+ next++;
+ }
+ continue;
+ }
+ if ( !strncmp( next, "csn=", STRLENOF("csn=") )) {
+ struct berval stamp;
+
+ next += STRLENOF("csn=");
+ while ( next < end ) {
+ csn_str = next;
+ csn_ptr = strchr( csn_str, '#' );
+ if ( !csn_ptr || csn_ptr > end )
+ break;
+ /* ad will be NULL when called from main. we just
+ * want to parse the rid then. But we still iterate
+ * through the string to find the end.
+ */
+ cval = strchr( csn_ptr, ';' );
+ if ( !cval )
+ cval = strchr(csn_ptr, ',' );
+ if ( cval )
+ stamp.bv_len = cval - csn_str;
+ else
+ stamp.bv_len = end - csn_str;
+ if ( ad ) {
+ struct berval bv;
+ stamp.bv_val = csn_str;
+ if ( ad->ad_type->sat_syntax->ssyn_validate(
+ ad->ad_type->sat_syntax, &stamp ) != LDAP_SUCCESS )
+ break;
+ if ( ad->ad_type->sat_equality->smr_normalize(
+ SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
+ ad->ad_type->sat_syntax,
+ ad->ad_type->sat_equality,
+ &stamp, &bv, memctx ) != LDAP_SUCCESS )
+ break;
+ ber_bvarray_add_x( &cookie->ctxcsn, &bv, memctx );
+ cookie->numcsns++;
+ }
+ if ( cval ) {
+ next = cval + 1;
+ if ( *cval != ';' )
+ break;
+ } else {
+ next = end;
+ break;
+ }
+ }
+ continue;
+ }
+ next++;
+ }
+ if ( cookie->numcsns ) {
+ cookie->sids = slap_parse_csn_sids( cookie->ctxcsn, cookie->numcsns,
+ memctx );
+ if ( cookie->numcsns > 1 )
+ slap_sort_csn_sids( cookie->ctxcsn, cookie->sids, cookie->numcsns, memctx );
+ }
+ return 0;
+}
+
+/* count the numcsns and regenerate the list of SIDs in a recomposed cookie */
+void
+slap_reparse_sync_cookie(
+ struct sync_cookie *cookie,
+ void *memctx )
+{
+ if ( cookie->ctxcsn ) {
+ for (; !BER_BVISNULL( &cookie->ctxcsn[cookie->numcsns] ); cookie->numcsns++);
+ }
+ if ( cookie->numcsns ) {
+ cookie->sids = slap_parse_csn_sids( cookie->ctxcsn, cookie->numcsns, NULL );
+ if ( cookie->numcsns > 1 )
+ slap_sort_csn_sids( cookie->ctxcsn, cookie->sids, cookie->numcsns, memctx );
+ }
+}
+
+int
+slap_init_sync_cookie_ctxcsn(
+ struct sync_cookie *cookie
+)
+{
+ char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE + 4 ];
+ struct berval octet_str = BER_BVNULL;
+ struct berval ctxcsn = BER_BVNULL;
+
+ if ( cookie == NULL )
+ return -1;
+
+ octet_str.bv_len = snprintf( csnbuf, LDAP_PVT_CSNSTR_BUFSIZE + 4,
+ "csn=%4d%02d%02d%02d%02d%02dZ#%06x#%02x#%06x",
+ 1900, 1, 1, 0, 0, 0, 0, 0, 0 );
+ octet_str.bv_val = csnbuf;
+ ch_free( cookie->octet_str.bv_val );
+ ber_dupbv( &cookie->octet_str, &octet_str );
+
+ ctxcsn.bv_val = octet_str.bv_val + 4;
+ ctxcsn.bv_len = octet_str.bv_len - 4;
+ cookie->ctxcsn = NULL;
+ value_add_one( &cookie->ctxcsn, &ctxcsn );
+ cookie->numcsns = 1;
+ cookie->sid = -1;
+
+ return 0;
+}
+
+struct sync_cookie *
+slap_dup_sync_cookie(
+ struct sync_cookie *dst,
+ struct sync_cookie *src
+)
+{
+ struct sync_cookie *new;
+ int i;
+
+ if ( src == NULL )
+ return NULL;
+
+ if ( dst ) {
+ ber_bvarray_free( dst->ctxcsn );
+ dst->ctxcsn = NULL;
+ dst->sids = NULL;
+ ch_free( dst->octet_str.bv_val );
+ BER_BVZERO( &dst->octet_str );
+ new = dst;
+ } else {
+ new = ( struct sync_cookie * )
+ ch_calloc( 1, sizeof( struct sync_cookie ));
+ }
+
+ new->rid = src->rid;
+ new->sid = src->sid;
+ new->numcsns = src->numcsns;
+
+ if ( src->numcsns ) {
+ if ( ber_bvarray_dup_x( &new->ctxcsn, src->ctxcsn, NULL )) {
+ if ( !dst ) {
+ ch_free( new );
+ }
+ return NULL;
+ }
+ new->sids = ch_malloc( src->numcsns * sizeof(int) );
+ for (i=0; i<src->numcsns; i++)
+ new->sids[i] = src->sids[i];
+ }
+
+ if ( !BER_BVISNULL( &src->octet_str )) {
+ ber_dupbv( &new->octet_str, &src->octet_str );
+ }
+
+ return new;
+}
+