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openldap/servers/slapd/modify.c

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/*
* Copyright 1998-1999 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 "slap.h"
static void modlist_free(LDAPModList *ml);
static int add_modified_attrs( Operation *op, LDAPModList **modlist );
int
do_modify(
Connection *conn,
Operation *op
)
{
char *ndn;
char *last;
ber_tag_t tag;
ber_len_t len;
LDAPModList *modlist;
LDAPModList **modtail;
#ifdef LDAP_DEBUG
LDAPModList *tmp;
#endif
Backend *be;
int rc;
Debug( LDAP_DEBUG_TRACE, "do_modify\n", 0, 0, 0 );
if( op->o_bind_in_progress ) {
Debug( LDAP_DEBUG_ANY, "do_modify: SASL bind in progress.\n",
0, 0, 0 );
send_ldap_result( conn, op, LDAP_SASL_BIND_IN_PROGRESS,
NULL, "SASL bind in progress", NULL, NULL );
return LDAP_SASL_BIND_IN_PROGRESS;
}
/*
* 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" /*}*/, &ndn ) == LBER_ERROR ) {
Debug( LDAP_DEBUG_ANY, "do_modify: ber_scanf failed\n", 0, 0, 0 );
send_ldap_disconnect( conn, op,
LDAP_PROTOCOL_ERROR, "decoding error" );
return -1;
}
Debug( LDAP_DEBUG_ARGS, "do_modify: dn (%s)\n", ndn, 0, 0 );
if( dn_normalize_case( ndn ) == NULL ) {
Debug( LDAP_DEBUG_ANY, "do_modify: invalid dn (%s)\n", ndn, 0, 0 );
send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
"invalid DN", NULL, NULL );
free( ndn );
return rc;
}
/* collect modifications & save for later */
modlist = NULL;
modtail = &modlist;
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" );
free( ndn );
free( *modtail );
*modtail = NULL;
modlist_free( modlist );
return -1;
}
(*modtail)->ml_op = mop;
if ( (*modtail)->ml_op != LDAP_MOD_ADD &&
(*modtail)->ml_op != LDAP_MOD_DELETE &&
(*modtail)->ml_op != LDAP_MOD_REPLACE )
{
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR,
NULL, "unrecognized modify operation", NULL, NULL );
free( ndn );
modlist_free( modlist );
return LDAP_PROTOCOL_ERROR;
}
if ( (*modtail)->ml_bvalues == NULL
&& (*modtail)->ml_op != LDAP_MOD_DELETE )
{
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR,
NULL, "unrecognized modify operation", NULL, NULL );
free( ndn );
modlist_free( modlist );
return LDAP_PROTOCOL_ERROR;
}
attr_normalize( (*modtail)->ml_type );
modtail = &(*modtail)->ml_next;
}
*modtail = NULL;
#ifdef LDAP_DEBUG
Debug( LDAP_DEBUG_ARGS, "modifications:\n", 0, 0, 0 );
for ( tmp = modlist; tmp != NULL; tmp = tmp->ml_next ) {
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
if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
free( ndn );
modlist_free( modlist );
Debug( LDAP_DEBUG_ANY, "do_modify: get_ctrls failed\n", 0, 0, 0 );
return rc;
}
Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d MOD dn=\"%s\"\n",
op->o_connid, op->o_opid, ndn, 0, 0 );
/*
* 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 )) == NULL ) {
free( ndn );
modlist_free( modlist );
send_ldap_result( conn, op, rc = LDAP_REFERRAL,
NULL, NULL, default_referral, NULL );
return rc;
}
if ( global_readonly || be->be_readonly ) {
Debug( LDAP_DEBUG_ANY, "do_modify: database is read-only\n",
0, 0, 0 );
send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
NULL, "database is read-only", NULL, NULL );
goto done;
}
/* 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 */
#ifndef SLAPD_MULTIMASTER
/* we don't have to check for replicator dn
* because we accept each modify request
*/
if ( be->be_update_ndn == NULL ||
strcmp( be->be_update_ndn, op->o_ndn ) == 0 )
#endif
{
if ( (be->be_lastmod == ON || (be->be_lastmod == UNDEFINED &&
global_lastmod == ON)) && be->be_update_ndn == NULL )
{
rc = add_modified_attrs( op, &modlist );
if( rc != LDAP_SUCCESS ) {
free( ndn );
modlist_free( modlist );
send_ldap_result( conn, op, rc,
NULL, "no-user-modification attribute type",
NULL, NULL );
return rc;
}
}
if ( (*be->be_modify)( be, conn, op, ndn, modlist ) == 0
#ifdef SLAPD_MULTIMASTER
&& ( be->be_update_ndn == NULL ||
strcmp( be->be_update_ndn, op->o_ndn ) != 0 )
#endif
) {
/* but we log only the ones not from a replicator user */
replog( be, op, ndn, modlist );
}
#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, "Function not implemented", NULL, NULL );
}
done:
free( ndn );
modlist_free( modlist );
return rc;
}
static int
add_modified_attrs( Operation *op, LDAPModList **modlist )
{
char buf[22];
struct berval bv;
struct berval *bvals[2];
LDAPModList *m;
struct tm *ltm;
time_t currenttime;
bvals[0] = &bv;
bvals[1] = NULL;
/* remove any attempts by the user to modify these attrs */
for ( m = *modlist; m != NULL; m = m->ml_next ) {
if ( oc_check_no_usermod_attr( m->ml_type ) ) {
return LDAP_CONSTRAINT_VIOLATION;
}
}
if ( op->o_dn == NULL || op->o_dn[0] == '\0' ) {
bv.bv_val = "NULLDN";
bv.bv_len = strlen( bv.bv_val );
} else {
bv.bv_val = op->o_dn;
bv.bv_len = strlen( bv.bv_val );
}
m = (LDAPModList *) ch_calloc( 1, sizeof(LDAPModList) );
m->ml_type = ch_strdup( "modifiersname" );
m->ml_op = LDAP_MOD_REPLACE;
m->ml_bvalues = (struct berval **) ch_calloc(2, sizeof(struct berval *));
m->ml_bvalues[0] = ber_bvdup( &bv );
m->ml_next = *modlist;
*modlist = m;
currenttime = slap_get_time();
ldap_pvt_thread_mutex_lock( &gmtime_mutex );
#ifndef LDAP_LOCALTIME
ltm = gmtime( &currenttime );
strftime( buf, sizeof(buf), "%Y%m%d%H%M%SZ", ltm );
#else
ltm = localtime( &currenttime );
strftime( buf, sizeof(buf), "%y%m%d%H%M%SZ", ltm );
#endif
ldap_pvt_thread_mutex_unlock( &gmtime_mutex );
bv.bv_val = buf;
bv.bv_len = strlen( bv.bv_val );
m = (LDAPModList *) ch_calloc( 1, sizeof(LDAPModList) );
m->ml_type = ch_strdup( "modifytimestamp" );
m->ml_op = LDAP_MOD_REPLACE;
m->ml_bvalues = (struct berval **) ch_calloc(2, sizeof(struct berval *));
m->ml_bvalues[0] = ber_bvdup( &bv );
m->ml_next = *modlist;
*modlist = m;
return LDAP_SUCCESS;
}
static void
modlist_free(
LDAPModList *ml
)
{
LDAPModList *next;
for ( ; ml != NULL; ml = next ) {
next = ml->ml_next;
free( ml->ml_type );
if ( ml->ml_bvalues != NULL )
ber_bvecfree( ml->ml_bvalues );
free( ml );
}
}
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