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openldap/servers/slapd/modify.c
Kurt Zeilenga 2a7036e5b0 ITS#963: Multimaster patch
2001-01-16 06:49:49 +00:00

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/* $OpenLDAP$ */
/*
* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
/*
* Copyright (c) 1995 Regents of the University of Michigan.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of Michigan at Ann Arbor. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "ldap_pvt.h"
#include "slap.h"
int
do_modify(
Connection *conn,
Operation *op )
{
char *dn, *ndn = NULL;
char *last;
ber_tag_t tag;
ber_len_t len;
LDAPModList *modlist = NULL;
LDAPModList **modtail = &modlist;
#ifdef LDAP_DEBUG
LDAPModList *tmp;
#endif
Modifications *mods = NULL;
Backend *be;
int rc;
const char *text;
int manageDSAit;
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
"do_modify: enter\n" ));
#else
Debug( LDAP_DEBUG_TRACE, "do_modify\n", 0, 0, 0 );
#endif
/*
* Parse the modify request. It looks like this:
*
* ModifyRequest := [APPLICATION 6] SEQUENCE {
* name DistinguishedName,
* mods SEQUENCE OF SEQUENCE {
* operation ENUMERATED {
* add (0),
* delete (1),
* replace (2)
* },
* modification SEQUENCE {
* type AttributeType,
* values SET OF AttributeValue
* }
* }
* }
*/
if ( ber_scanf( op->o_ber, "{a" /*}*/, &dn ) == LBER_ERROR ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"do_modify: ber_scanf failed\n" ));
#else
Debug( LDAP_DEBUG_ANY, "do_modify: ber_scanf failed\n", 0, 0, 0 );
#endif
send_ldap_disconnect( conn, op,
LDAP_PROTOCOL_ERROR, "decoding error" );
return SLAPD_DISCONNECT;
}
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
"do_modify: dn (%s)\n", dn ));
#else
Debug( LDAP_DEBUG_ARGS, "do_modify: dn (%s)\n", dn, 0, 0 );
#endif
/* collect modifications & save for later */
for ( tag = ber_first_element( op->o_ber, &len, &last );
tag != LBER_DEFAULT;
tag = ber_next_element( op->o_ber, &len, last ) )
{
ber_int_t mop;
(*modtail) = (LDAPModList *) ch_calloc( 1, sizeof(LDAPModList) );
if ( ber_scanf( op->o_ber, "{i{a[V]}}", &mop,
&(*modtail)->ml_type, &(*modtail)->ml_bvalues )
== LBER_ERROR )
{
send_ldap_disconnect( conn, op,
LDAP_PROTOCOL_ERROR, "decoding modlist error" );
rc = SLAPD_DISCONNECT;
goto cleanup;
}
switch( mop ) {
case LDAP_MOD_ADD:
if ( (*modtail)->ml_bvalues == NULL ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"do_modify: modify/add operation (%ld) requires values\n",
(long)mop ));
#else
Debug( LDAP_DEBUG_ANY,
"do_modify: modify/add operation (%ld) requires values\n",
(long) mop, 0, 0 );
#endif
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR,
NULL, "modify/add operation requires values",
NULL, NULL );
rc = LDAP_PROTOCOL_ERROR;
goto cleanup;
}
/* fall through */
case LDAP_MOD_DELETE:
case LDAP_MOD_REPLACE:
break;
default: {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"do_modify: invalid modify operation (%ld)\n",
(long)mop ));
#else
Debug( LDAP_DEBUG_ANY,
"do_modify: invalid modify operation (%ld)\n",
(long) mop, 0, 0 );
#endif
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR,
NULL, "unrecognized modify operation", NULL, NULL );
rc = LDAP_PROTOCOL_ERROR;
goto cleanup;
}
}
(*modtail)->ml_op = mop;
modtail = &(*modtail)->ml_next;
}
*modtail = NULL;
if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"do_modify: get_ctrls failed\n" ));
#else
Debug( LDAP_DEBUG_ANY, "do_modify: get_ctrls failed\n", 0, 0, 0 );
#endif
goto cleanup;
}
ndn = ch_strdup( dn );
if( dn_normalize( ndn ) == NULL ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"do_modify: invalid dn (%s)\n", dn ));
#else
Debug( LDAP_DEBUG_ANY, "do_modify: invalid dn (%s)\n", dn, 0, 0 );
#endif
send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
"invalid DN", NULL, NULL );
goto cleanup;
}
if( ndn == '\0' ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"do_modify: attempt to modify root DSE.\n" ));
#else
Debug( LDAP_DEBUG_ANY, "do_modify: root dse!\n", 0, 0, 0 );
#endif
send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
NULL, "modify upon the root DSE not supported", NULL, NULL );
goto cleanup;
}
#ifdef LDAP_DEBUG
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
"do_modify: modifications:\n" ));
#else
Debug( LDAP_DEBUG_ARGS, "modifications:\n", 0, 0, 0 );
#endif
for ( tmp = modlist; tmp != NULL; tmp = tmp->ml_next ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
"\t%s: %s\n", tmp->ml_op == LDAP_MOD_ADD ?
"add" : (tmp->ml_op == LDAP_MOD_DELETE ?
"delete" : "replace"), tmp->ml_type ));
#else
Debug( LDAP_DEBUG_ARGS, "\t%s: %s\n",
tmp->ml_op == LDAP_MOD_ADD
? "add" : (tmp->ml_op == LDAP_MOD_DELETE
? "delete" : "replace"), tmp->ml_type, 0 );
#endif
}
#endif
Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d MOD dn=\"%s\"\n",
op->o_connid, op->o_opid, dn, 0, 0 );
manageDSAit = get_manageDSAit( op );
/*
* We could be serving multiple database backends. Select the
* appropriate one, or send a referral to our "referral server"
* if we don't hold it.
*/
if ( (be = select_backend( ndn, manageDSAit )) == NULL ) {
send_ldap_result( conn, op, rc = LDAP_REFERRAL,
NULL, NULL, default_referral, NULL );
goto cleanup;
}
/* check restrictions */
rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
if( rc != LDAP_SUCCESS ) {
send_ldap_result( conn, op, rc,
NULL, text, NULL, NULL );
goto cleanup;
}
/* check for referrals */
rc = backend_check_referrals( be, conn, op, dn, ndn );
if ( rc != LDAP_SUCCESS ) {
goto cleanup;
}
/* deref suffix alias if appropriate */
ndn = suffix_alias( be, ndn );
/*
* do the modify if 1 && (2 || 3)
* 1) there is a modify function implemented in this backend;
* 2) this backend is master for what it holds;
* 3) it's a replica and the dn supplied is the update_ndn.
*/
if ( be->be_modify ) {
/* do the update here */
int repl_user = (be->be_update_ndn != NULL &&
strcmp( be->be_update_ndn, op->o_ndn ) == 0);
#ifndef SLAPD_MULTIMASTER
/* Multimaster slapd does not have to check for replicator dn
* because it accepts each modify request
*/
if ( be->be_update_ndn == NULL || repl_user )
#endif
{
int update = be->be_update_ndn != NULL;
const char *text;
rc = slap_modlist2mods( modlist, update, &mods, &text );
if( rc != LDAP_SUCCESS ) {
send_ldap_result( conn, op, rc,
NULL, text, NULL, NULL );
goto cleanup;
}
if ( (be->be_lastmod == ON || (be->be_lastmod == UNDEFINED &&
global_lastmod == ON)) && !repl_user )
{
Modifications **modstail;
for( modstail = &mods;
*modstail != NULL;
modstail = &(*modstail)->sml_next )
{
/* empty */
}
rc = slap_mods_opattrs( op, modstail, &text );
if( rc != LDAP_SUCCESS ) {
send_ldap_result( conn, op, rc,
NULL, text,
NULL, NULL );
goto cleanup;
}
}
if ( (*be->be_modify)( be, conn, op, dn, ndn, mods ) == 0
#ifdef SLAPD_MULTIMASTER
&& !repl_user
#endif
) {
/* but we log only the ones not from a replicator user */
replog( be, op, dn, mods );
}
#ifndef SLAPD_MULTIMASTER
/* send a referral */
} else {
send_ldap_result( conn, op, rc = LDAP_REFERRAL, NULL, NULL,
be->be_update_refs ? be->be_update_refs : default_referral,
NULL );
#endif
}
} else {
send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
NULL, "operation not supported within namingContext", NULL, NULL );
}
cleanup:
free( dn );
if( ndn != NULL ) free( ndn );
if ( modlist != NULL )
slap_modlist_free( modlist );
if ( mods != NULL )
slap_mods_free( mods );
return rc;
}
/*
* convert a raw list of modifications to internal format
* Do basic attribute type checking and syntax validation.
*/
int slap_modlist2mods(
LDAPModList *ml,
int update,
Modifications **mods,
const char **text )
{
int rc;
Modifications **modtail = mods;
for( ; ml != NULL; ml = ml->ml_next ) {
Modifications *mod;
AttributeDescription *ad = NULL;
mod = (Modifications *)
ch_calloc( 1, sizeof(Modifications) );
/* copy the op */
mod->sml_op = ml->ml_op;
/* convert to attribute description */
rc = slap_str2ad( ml->ml_type, &mod->sml_desc, text );
if( rc != LDAP_SUCCESS ) {
slap_mods_free( mod );
return rc;
}
ad = mod->sml_desc;
if( slap_syntax_is_binary( ad->ad_type->sat_syntax )
&& !slap_ad_is_binary( ad ))
{
/* attribute requires binary transfer */
slap_mods_free( mod );
*text = "attribute requires ;binary transfer";
return LDAP_UNDEFINED_TYPE;
}
if( !slap_syntax_is_binary( ad->ad_type->sat_syntax )
&& slap_ad_is_binary( ad ))
{
/* attribute requires binary transfer */
slap_mods_free( mod );
*text = "attribute disallows ;binary transfer";
return LDAP_UNDEFINED_TYPE;
}
if (!update && is_at_no_user_mod( ad->ad_type )) {
/* user modification disallowed */
slap_mods_free( mod );
*text = "no user modification allowed";
return LDAP_CONSTRAINT_VIOLATION;
}
/*
* check values
*/
if( ml->ml_bvalues != NULL ) {
ber_len_t nvals;
slap_syntax_validate_func *validate =
ad->ad_type->sat_syntax->ssyn_validate;
if( !validate ) {
#ifdef NEW_LOGGING
LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
"modlist2mods: no validator for syntax %S\n",
ad->ad_type->sat_syntax->ssyn_oid ));
#else
Debug( LDAP_DEBUG_TRACE,
"modlist2mods: no validator for syntax %s\n",
ad->ad_type->sat_syntax->ssyn_oid, 0, 0 );
#endif
slap_mods_free( mod );
*text = "no validator for syntax";
return LDAP_INVALID_SYNTAX;
}
/*
* check that each value is valid per syntax
*/
for( nvals = 0; ml->ml_bvalues[nvals]; nvals++ ) {
rc = validate( ad->ad_type->sat_syntax, ml->ml_bvalues[nvals] );
if( rc != 0 ) {
slap_mods_free( mod );
*text = "value contains invalid data";
return LDAP_INVALID_SYNTAX;
}
}
/*
* a rough single value check... an additional check is needed
* to catch add of single value to existing single valued attribute
*/
if( ( mod->sml_op == LDAP_MOD_ADD || mod->sml_op == LDAP_MOD_REPLACE )
&& nvals > 1 && is_at_single_value( ad->ad_type ))
{
slap_mods_free( mod );
*text = "multiple values provided";
return LDAP_INVALID_SYNTAX;
}
}
mod->sml_bvalues = ml->ml_bvalues;
ml->ml_values = NULL;
*modtail = mod;
modtail = &mod->sml_next;
}
return LDAP_SUCCESS;
}
int slap_mods_opattrs(
Operation *op,
Modifications **modtail,
const char **text )
{
struct berval name, timestamp;
time_t now = slap_get_time();
char timebuf[22];
struct tm *ltm;
Modifications *mod;
int mop = op->o_tag == LDAP_REQ_ADD
? LDAP_MOD_ADD : LDAP_MOD_REPLACE;
assert( modtail != NULL );
assert( *modtail == NULL );
ldap_pvt_thread_mutex_lock( &gmtime_mutex );
ltm = gmtime( &now );
strftime( timebuf, sizeof(timebuf), "%Y%m%d%H%M%SZ", ltm );
ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
timestamp.bv_val = timebuf;
timestamp.bv_len = strlen(timebuf);
if( op->o_dn == NULL || op->o_dn[0] == '\0' ) {
name.bv_val = SLAPD_ANONYMOUS;
name.bv_len = sizeof(SLAPD_ANONYMOUS)-1;
} else {
name.bv_val = op->o_dn;
name.bv_len = strlen( op->o_dn );
}
if( op->o_tag == LDAP_REQ_ADD ) {
mod = (Modifications *) ch_calloc( 1, sizeof( Modifications ) );
mod->sml_op = mop;
mod->sml_desc = ad_dup( slap_schema.si_ad_creatorsName );
mod->sml_bvalues = (struct berval **) malloc( 2 * sizeof( struct berval * ) );
mod->sml_bvalues[0] = ber_bvdup( &name );
mod->sml_bvalues[1] = NULL;
*modtail = mod;
modtail = &mod->sml_next;
mod = (Modifications *) ch_calloc( 1, sizeof( Modifications ) );
mod->sml_op = mop;
mod->sml_desc = ad_dup( slap_schema.si_ad_createTimestamp );
mod->sml_bvalues = (struct berval **) malloc( 2 * sizeof( struct berval * ) );
mod->sml_bvalues[0] = ber_bvdup( &timestamp );
mod->sml_bvalues[1] = NULL;
*modtail = mod;
modtail = &mod->sml_next;
}
mod = (Modifications *) ch_calloc( 1, sizeof( Modifications ) );
mod->sml_op = mop;
mod->sml_desc = ad_dup( slap_schema.si_ad_modifiersName );
mod->sml_bvalues = (struct berval **) malloc( 2 * sizeof( struct berval * ) );
mod->sml_bvalues[0] = ber_bvdup( &name );
mod->sml_bvalues[1] = NULL;
*modtail = mod;
modtail = &mod->sml_next;
mod = (Modifications *) ch_calloc( 1, sizeof( Modifications ) );
mod->sml_op = mop;
mod->sml_desc = ad_dup( slap_schema.si_ad_modifyTimestamp );
mod->sml_bvalues = (struct berval **) malloc( 2 * sizeof( struct berval * ) );
mod->sml_bvalues[0] = ber_bvdup( &timestamp );
mod->sml_bvalues[1] = NULL;
*modtail = mod;
modtail = &mod->sml_next;
return LDAP_SUCCESS;
}
void
slap_mod_free(
Modification *mod,
int freeit
)
{
ad_free( mod->sm_desc, 1 );
if ( mod->sm_bvalues != NULL )
ber_bvecfree( mod->sm_bvalues );
if( freeit )
free( mod );
}
void
slap_mods_free(
Modifications *ml
)
{
Modifications *next;
for ( ; ml != NULL; ml = next ) {
next = ml->sml_next;
slap_mod_free( &ml->sml_mod, 0 );
free( ml );
}
}
void
slap_modlist_free(
LDAPModList *ml
)
{
LDAPModList *next;
for ( ; ml != NULL; ml = next ) {
next = ml->ml_next;
if (ml->ml_type)
free( ml->ml_type );
if ( ml->ml_bvalues != NULL )
ber_bvecfree( ml->ml_bvalues );
free( ml );
}
}
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