389-ds-base/ldap/servers/plugins/replication/repl_controls.c

/** BEGIN COPYRIGHT BLOCK
 * This Program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; version 2 of the License.
 * 
 * This Program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA.
 * 
 * In addition, as a special exception, Red Hat, Inc. gives You the additional
 * right to link the code of this Program with code not covered under the GNU
 * General Public License ("Non-GPL Code") and to distribute linked combinations
 * including the two, subject to the limitations in this paragraph. Non-GPL Code
 * permitted under this exception must only link to the code of this Program
 * through those well defined interfaces identified in the file named EXCEPTION
 * found in the source code files (the "Approved Interfaces"). The files of
 * Non-GPL Code may instantiate templates or use macros or inline functions from
 * the Approved Interfaces without causing the resulting work to be covered by
 * the GNU General Public License. Only Red Hat, Inc. may make changes or
 * additions to the list of Approved Interfaces. You must obey the GNU General
 * Public License in all respects for all of the Program code and other code used
 * in conjunction with the Program except the Non-GPL Code covered by this
 * exception. If you modify this file, you may extend this exception to your
 * version of the file, but you are not obligated to do so. If you do not wish to
 * provide this exception without modification, you must delete this exception
 * statement from your version and license this file solely under the GPL without
 * exception. 
 * 
 * 
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif


#include "slapi-plugin.h"
#include "repl5.h"
#include "repl.h" /* For LDAP_CONTROL_REPL_MODRDN_EXTRAMODS */

/*
 * repl_controls.c - convenience functions for creating and
 * decoding controls that implement 5.0-style replication
 * protocol operations.
 *
 * TODO: Send modrdn mods with modrdn operation
 *       Fix ber_printf() and ber_scanf() format strings - some are
 *       the wrong types.
 */

/*
 * Return a pointer to a NSDS50ReplUpdateInfoControl.
 * The control looks like this:
 *
 * NSDS50ReplUpdateInfoControl ::= SEQUENCE { 
 *     uuid OCTET STRING, 
 *     csn OCTET STRING, 
 *     OPTIONAL [new]superior-uuid OCTET STRING 
 *     OPTIONAL modrdn_mods XXXggood WHAT TYPE???
 * } 
 */
int
create_NSDS50ReplUpdateInfoControl(const char *uuid,
	const char *superior_uuid, const CSN *csn,
	LDAPMod **modrdn_mods, LDAPControl **ctrlp)
{
	int retval;
	BerElement *tmp_bere = NULL;
	char csn_str[CSN_STRSIZE];	

	if (NULL == ctrlp)
	{
		retval = LDAP_PARAM_ERROR;
		goto loser;
	}
	else
	{
		if ((tmp_bere = ber_alloc()) == NULL)
		{
			retval = LDAP_NO_MEMORY;
			goto loser;
		}
		else
		{
			/* Stuff uuid and csn into BerElement */
			if (ber_printf(tmp_bere, "{") == -1)
			{
				retval = LDAP_ENCODING_ERROR;
				goto loser;
			}

			/* Stuff uuid of this entry into BerElement */
			if (ber_printf(tmp_bere, "s", uuid) == -1)
			{
				retval = LDAP_ENCODING_ERROR;
				goto loser;
			}

			/* Stuff csn of this change into BerElement */
			csn_as_string(csn, PR_FALSE, csn_str);
			if (ber_printf(tmp_bere, "s", csn_str) == -1)
			{
				retval = LDAP_ENCODING_ERROR;
				goto loser;
			}

			/* If present, stuff uuid of parent entry into BerElement */
			if (NULL != superior_uuid)
			{
				if (ber_printf(tmp_bere, "s", superior_uuid) == -1)
				{
					retval = LDAP_ENCODING_ERROR;
					goto loser;
				}
			}

			/* If present, add the modrdn mods */
			if (NULL != modrdn_mods)
			{
				int i;
				if (ber_printf(tmp_bere, "{" ) == -1)
				{
					retval = LDAP_ENCODING_ERROR;
					goto loser;
				}
				/* for each modification to be performed... */
				for (i = 0; NULL != modrdn_mods[i]; i++)
				{
					if (ber_printf(tmp_bere, "{e{s[V]}}",
						modrdn_mods[i]->mod_op & ~LDAP_MOD_BVALUES,
						modrdn_mods[i]->mod_type, modrdn_mods[i]->mod_bvalues ) == -1)
					{
						retval = LDAP_ENCODING_ERROR;
						goto loser;
					}
				}
				if (ber_printf(tmp_bere, "}") == -1)
				{
					retval = LDAP_ENCODING_ERROR;
					goto loser;
				}
			}

			/* Close the sequence */
			if (ber_printf(tmp_bere, "}") == -1)
			{
				retval = LDAP_ENCODING_ERROR;
				goto loser;
			}

			retval = slapi_build_control( REPL_NSDS50_UPDATE_INFO_CONTROL_OID,
			    tmp_bere, 1 /* is critical */, ctrlp);
		}
	}
loser:
	if (NULL != tmp_bere)
	{
		ber_free(tmp_bere, 1); 
		tmp_bere = NULL;
	}
	return retval;
}


/*
 * Destroy a ReplUpdateInfoControl and set the pointer to NULL.
 */
void
destroy_NSDS50ReplUpdateInfoControl(LDAPControl **ctrlp)
{
	if (NULL != ctrlp && NULL != *ctrlp)
	{
		ldap_control_free(*ctrlp);
		*ctrlp = NULL;
	}
}




/*
 * Look through the array of controls. If an NSDS50ReplUpdateInfoControl
 * is present, decode it and return pointers to the broken-out
 * components. The caller is responsible for freeing pointers to
 * the returned objects. The caller may indicate that it is not
 * interested in any of the output parameters by passing NULL
 * for that parameter.
 *
 * Returns 0 if the control is not present, 1 if it is present, and
 * -1 if an error occurs.
 */
int
decode_NSDS50ReplUpdateInfoControl(LDAPControl **controlsp, 
	char **uuid, char **superior_uuid,
	CSN **csn, LDAPMod ***modrdn_mods)
{
	struct berval *ctl_value = NULL;
	int iscritical = 0;
	int rc = -1;
	struct berval uuid_val = {0};
	struct berval superior_uuid_val = {0};
	struct berval csn_val = {0};
	BerElement *tmp_bere = NULL;
	Slapi_Mods modrdn_smods;
	PRBool got_modrdn_mods = PR_FALSE;
	ber_len_t len;

	slapi_mods_init(&modrdn_smods, 4);
	if (slapi_control_present(controlsp, REPL_NSDS50_UPDATE_INFO_CONTROL_OID,
	    &ctl_value, &iscritical))
	{
		if (!BV_HAS_DATA(ctl_value) || (tmp_bere = ber_init(ctl_value)) == NULL)
		{
			rc = -1;
			goto loser;
		}
		if (ber_scanf(tmp_bere, "{oo", &uuid_val, &csn_val) == LBER_ERROR)
		{
			rc = -1;
			goto loser;
		}
		if (ber_peek_tag(tmp_bere, &len) == LBER_OCTETSTRING)
		{
			/* The optional superior_uuid is present */
			if (ber_scanf(tmp_bere, "o", &superior_uuid_val) == LBER_DEFAULT)
			{
				rc = -1;
				goto loser;
			}
		}
		if (ber_peek_tag(tmp_bere, &len) == LBER_SEQUENCE)
		{
			ber_tag_t emtag;
			ber_len_t emlen;
			char *emlast;

			for ( emtag = ber_first_element( tmp_bere, &emlen, &emlast );
				  emtag != LBER_ERROR && emtag != LBER_END_OF_SEQORSET;
				  emtag = ber_next_element( tmp_bere, &emlen, emlast ))
			{
				struct berval **embvals;
				ber_int_t op;
				char *type;
				if ( ber_scanf( tmp_bere, "{i{a[V]}}", &op, &type, &embvals ) == LBER_ERROR )
				{
					rc = -1;
					goto loser;
				}
				slapi_mods_add_modbvps(&modrdn_smods, op, type, embvals);
				slapi_ch_free_string( &type );
				ber_bvecfree( embvals );
			}
			got_modrdn_mods = PR_TRUE;
		}
		if (ber_scanf(tmp_bere, "}") == LBER_ERROR)
		{
			rc = -1;
			goto loser;
		}

		if (NULL != uuid)
		{
			*uuid = slapi_ch_malloc(uuid_val.bv_len + 1);
			strncpy(*uuid, uuid_val.bv_val, uuid_val.bv_len);
			(*uuid)[uuid_val.bv_len] = '\0';
		}

		if (NULL != csn)
		{
			char *csnstr = slapi_ch_malloc(csn_val.bv_len + 1);
			strncpy(csnstr, csn_val.bv_val, csn_val.bv_len);
			csnstr[csn_val.bv_len] = '\0';
			*csn = csn_new_by_string(csnstr);
			slapi_ch_free((void **)&csnstr);
		}

		if (NULL != superior_uuid && NULL != superior_uuid_val.bv_val)
		{
			*superior_uuid = slapi_ch_malloc(superior_uuid_val.bv_len + 1);
			strncpy(*superior_uuid, superior_uuid_val.bv_val,
			    superior_uuid_val.bv_len);
			(*superior_uuid)[superior_uuid_val.bv_len] = '\0';
		}

		if (NULL != modrdn_mods && got_modrdn_mods)
		{
			*modrdn_mods = slapi_mods_get_ldapmods_passout(&modrdn_smods);
		}
		slapi_mods_done(&modrdn_smods);

		rc = 1;
	}
	else
	{
		rc = 0;
	}
loser:
	/* XXXggood free CSN here if allocated */

	if (NULL != tmp_bere)
	{
		ber_free(tmp_bere, 1); 
		tmp_bere = NULL;
	}
	if (NULL != uuid_val.bv_val)
	{
		ldap_memfree(uuid_val.bv_val); 
		uuid_val.bv_val = NULL;
	}
	if (NULL != superior_uuid_val.bv_val)
	{
		ldap_memfree(superior_uuid_val.bv_val);
		superior_uuid_val.bv_val = NULL;
	}
	if (NULL != csn_val.bv_val)
	{
		ldap_memfree(csn_val.bv_val); 
		csn_val.bv_val = NULL;
	}
	return rc;
}



void
add_repl_control_mods( Slapi_PBlock *pb, Slapi_Mods *smods )
{
    struct berval *embvp;
    LDAPControl **controls = NULL;

    slapi_pblock_get( pb, SLAPI_REQCONTROLS, &controls);
    if ( slapi_control_present( controls,
				LDAP_CONTROL_REPL_MODRDN_EXTRAMODS, 
				&embvp, NULL ))
	{
    	if ( embvp != NULL && embvp->bv_len > 0 && embvp->bv_val != NULL )
    	{
    	    /* Parse the extramods stuff */
    	    ber_int_t op;
    	    char *type;
    	    ber_len_t emlen;
    	    ber_tag_t emtag;
    	    char *emlast;
    	    BerElement *ember = ber_init( embvp );
    	    if ( ember != NULL )
    		{
        		for ( emtag = ber_first_element( ember, &emlen, &emlast );
        		      emtag != LBER_ERROR && emtag != LBER_END_OF_SEQORSET;
        		      emtag = ber_next_element( ember, &emlen, emlast ))
			    {
        		    struct berval **embvals = NULL;
        		    type = NULL;
        		    if ( ber_scanf( ember, "{i{a[V]}}", &op, &type, &embvals ) != LBER_ERROR )
					{
        				slapi_mods_add_modbvps( smods, op, type, embvals);
					/* GGOODREPL I suspect this will cause two sets of lastmods attr values
						to end up in the entry. We need to remove the old ones.
					*/
        		    }
        		    slapi_ch_free_string( &type );
        		    ber_bvecfree( embvals );
        		}
    	    }
    	    ber_free( ember, 1 );
    	}
    }
}