openldap/servers/slapd/modify.c

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/*
* 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.
*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
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#include "slap.h"
static void modlist_free(LDAPModList *ml);
static void add_lastmods(Operation *op, LDAPModList **ml);
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void
do_modify(
Connection *conn,
Operation *op
)
{
char *ndn;
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char *last;
unsigned long tag, len;
LDAPModList *modlist, *tmp;
LDAPModList **modtail;
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Backend *be;
Debug( LDAP_DEBUG_TRACE, "do_modify\n", 0, 0, 0 );
/*
* 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 ) {
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Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL, "" );
return;
}
Debug( LDAP_DEBUG_ARGS, "do_modify: dn (%s)\n", ndn, 0, 0 );
(void) dn_normalize_case( ndn );
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/* collect modifications & save for later */
modlist = NULL;
modtail = &modlist;
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for ( tag = ber_first_element( op->o_ber, &len, &last );
tag != LBER_DEFAULT;
tag = ber_next_element( op->o_ber, &len, last ) )
{
(*modtail) = (LDAPModList *) ch_calloc( 1, sizeof(LDAPModList) );
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if ( ber_scanf( op->o_ber, "{i{a[V]}}", &(*modtail)->ml_op,
&(*modtail)->ml_type, &(*modtail)->ml_bvalues )
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== LBER_ERROR )
{
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
"decoding error" );
free( ndn );
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free( *modtail );
*modtail = NULL;
modlist_free( modlist );
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return;
}
if ( (*modtail)->ml_op != LDAP_MOD_ADD &&
(*modtail)->ml_op != LDAP_MOD_DELETE &&
(*modtail)->ml_op != LDAP_MOD_REPLACE )
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{
send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
"unrecognized modify operation" );
free( ndn );
modlist_free( modlist );
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return;
}
if ( (*modtail)->ml_bvalues == NULL
&& (*modtail)->ml_op != LDAP_MOD_DELETE )
{
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send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
"no values given" );
free( ndn );
modlist_free( modlist );
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return;
}
attr_normalize( (*modtail)->ml_type );
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modtail = &(*modtail)->ml_next;
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}
*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 );
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}
#endif
Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d MOD dn=\"%s\"\n",
conn->c_connid, op->o_opid, ndn, 0, 0 );
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/*
* 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 );
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send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS, NULL,
default_referral );
return;
}
/* alias suffix if approp */
ndn = suffixAlias ( ndn, op, be );
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/*
* 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.
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*/
if ( be->be_modify != NULL ) {
/* do the update here */
if ( be->be_update_ndn == NULL ||
strcmp( be->be_update_ndn, op->o_ndn ) == 0 )
{
if ( (be->be_lastmod == ON || ( be->be_lastmod == UNDEFINED &&
global_lastmod == ON ) ) && be->be_update_ndn == NULL ) {
add_lastmods( op, &modlist );
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}
if ( (*be->be_modify)( be, conn, op, ndn, modlist ) == 0 ) {
replog( be, LDAP_REQ_MODIFY, ndn, modlist, 0 );
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}
/* send a referral */
} else {
send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS, NULL,
default_referral );
}
} else {
send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
"Function not implemented" );
}
free( ndn );
modlist_free( modlist );
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}
static void
modlist_free(
LDAPModList *ml
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)
{
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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}
}
static void
add_lastmods( Operation *op, LDAPModList **modlist )
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{
char buf[22];
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struct berval bv;
struct berval *bvals[2];
LDAPModList **m;
LDAPModList *tmp;
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struct tm *ltm;
Debug( LDAP_DEBUG_TRACE, "add_lastmods\n", 0, 0, 0 );
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 ( strcasecmp( (*m)->ml_type, "modifytimestamp" ) == 0 ||
strcasecmp( (*m)->ml_type, "modifiersname" ) == 0 ||
strcasecmp( (*m)->ml_type, "createtimestamp" ) == 0 ||
strcasecmp( (*m)->ml_type, "creatorsname" ) == 0 ) {
Debug( LDAP_DEBUG_TRACE,
"add_lastmods: found lastmod attr: %s\n",
(*m)->ml_type, 0, 0 );
tmp = *m;
*m = (*m)->ml_next;
free( tmp->ml_type );
if ( tmp->ml_bvalues != NULL ) {
ber_bvecfree( tmp->ml_bvalues );
}
free( tmp );
if (!*m)
break;
}
}
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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 );
}
tmp = (LDAPModList *) ch_calloc( 1, sizeof(LDAPModList) );
tmp->ml_type = ch_strdup( "modifiersname" );
tmp->ml_op = LDAP_MOD_REPLACE;
tmp->ml_bvalues = (struct berval **) ch_calloc( 1,
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2 * sizeof(struct berval *) );
tmp->ml_bvalues[0] = ber_bvdup( &bv );
tmp->ml_next = *modlist;
*modlist = tmp;
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ldap_pvt_thread_mutex_lock( &currenttime_mutex );
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#ifndef LDAP_LOCALTIME
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ltm = gmtime( &currenttime );
strftime( buf, sizeof(buf), "%Y%m%d%H%M%SZ", ltm );
#else
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ltm = localtime( &currenttime );
strftime( buf, sizeof(buf), "%y%m%d%H%M%SZ", ltm );
#endif
ldap_pvt_thread_mutex_unlock( &currenttime_mutex );
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bv.bv_val = buf;
bv.bv_len = strlen( bv.bv_val );
tmp = (LDAPModList *) ch_calloc( 1, sizeof(LDAPModList) );
tmp->ml_type = ch_strdup( "modifytimestamp" );
tmp->ml_op = LDAP_MOD_REPLACE;
tmp->ml_bvalues = (struct berval **) ch_calloc( 1, 2 * sizeof(struct berval *) );
tmp->ml_bvalues[0] = ber_bvdup( &bv );
tmp->ml_next = *modlist;
*modlist = tmp;
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}