/*
 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation. Portions created by Netscape are
 * Copyright (C) 1998-1999 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s):
 */
/*
 * setoption.c - ldap_set_option implementation
 */

#include "ldap-int.h"
#ifdef _SOLARIS_SDK
#include "solaris-priv.h"
#endif

extern int nsldapi_sasl_secprops(const char *in,
	sasl_security_properties_t *secprops);

#define	LDAP_SETCLR_BITOPT(ld, bit, optdata) \
	if (optdata != NULL) {		\
		(ld)->ld_options |= bit;	\
	} else {				\
		(ld)->ld_options &= ~bit;	\
	}


int
LDAP_CALL
ldap_set_option(LDAP *ld, int option, const void *optdata)
{
	int		rc, i;
	char		*matched, *errstr;

	if (!nsldapi_initialized) {
		nsldapi_initialize_defaults();
	}

	/*
	 * process global options (not associated with an LDAP session handle)
	 */
	if (option == LDAP_OPT_MEMALLOC_FN_PTRS) {
		struct lber_memalloc_fns	memalloc_fns;

		/* set libldap ones via a struct copy */
		nsldapi_memalloc_fns = *((struct ldap_memalloc_fns *)optdata);

		/* also set liblber memory allocation callbacks */
		memalloc_fns.lbermem_malloc =
		    nsldapi_memalloc_fns.ldapmem_malloc;
		memalloc_fns.lbermem_calloc =
		    nsldapi_memalloc_fns.ldapmem_calloc;
		memalloc_fns.lbermem_realloc =
		    nsldapi_memalloc_fns.ldapmem_realloc;
		memalloc_fns.lbermem_free =
		    nsldapi_memalloc_fns.ldapmem_free;
		if (ber_set_option(NULL, LBER_OPT_MEMALLOC_FN_PTRS,
		    &memalloc_fns) != 0) {
			return (-1);
		}

		return (0);
	}
	/*
	 * LDAP_OPT_DEBUG_LEVEL is global
	 */
	if (LDAP_OPT_DEBUG_LEVEL == option) {
#ifdef LDAP_DEBUG
		ldap_debug = *((int *)optdata);
#endif
		return (0);
	}

	/*
	 * if ld is NULL, arrange to modify our default settings
	 */
	if (ld == NULL) {
		ld = &nsldapi_ld_defaults;
#ifdef LDAP_DEBUG
		ldap_debug = 0;
#endif

	}

	/*
	 * process options that are associated with an LDAP session handle
	 */
	if (!NSLDAPI_VALID_LDAP_POINTER(ld)) {
		return (-1);	/* punt */
	}

	rc = 0;
	if (ld != &nsldapi_ld_defaults &&
		option != LDAP_OPT_EXTRA_THREAD_FN_PTRS &&
		option != LDAP_OPT_THREAD_FN_PTRS) {
		LDAP_MUTEX_LOCK(ld, LDAP_OPTION_LOCK);
	}
	switch (option) {
	/* options that can be turned on and off */
#ifdef LDAP_DNS
	case LDAP_OPT_DNS:
		LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_DNS, optdata);
		break;
#endif

	case LDAP_OPT_REFERRALS:
		LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_REFERRALS, optdata);
		break;

#ifdef LDAP_SSLIO_HOOKS
	case LDAP_OPT_SSL:
		LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_SSL, optdata);
		break;
#endif

	case LDAP_OPT_RESTART:
		LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_RESTART, optdata);
		break;

	case LDAP_OPT_RECONNECT:
		LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_RECONNECT, optdata);
		break;

#ifdef LDAP_ASYNC_IO
	case LDAP_OPT_ASYNC_CONNECT:
		LDAP_SETCLR_BITOPT(ld, LDAP_BITOPT_ASYNC, optdata);
		break;
#endif /* LDAP_ASYNC_IO */

	/* fields in the LDAP structure */
	case LDAP_OPT_DEREF:
		ld->ld_deref = *((int *)optdata);
		break;
	case LDAP_OPT_SIZELIMIT:
		ld->ld_sizelimit = *((int *)optdata);
		break;
	case LDAP_OPT_TIMELIMIT:
		ld->ld_timelimit = *((int *)optdata);
		break;
	case LDAP_OPT_REFERRAL_HOP_LIMIT:
		ld->ld_refhoplimit = *((int *)optdata);
		break;
	case LDAP_OPT_PROTOCOL_VERSION:
		ld->ld_version = *((int *)optdata);
		if (ld->ld_defconn != NULL) {	/* also set in default conn. */
			ld->ld_defconn->lconn_version = ld->ld_version;
		}
		break;
	case LDAP_OPT_SERVER_CONTROLS:
		/* nsldapi_dup_controls returns -1 and sets lderrno on error */
		rc = nsldapi_dup_controls(ld, &ld->ld_servercontrols,
		    (LDAPControl **)optdata);
		break;
	case LDAP_OPT_CLIENT_CONTROLS:
		/* nsldapi_dup_controls returns -1 and sets lderrno on error */
		rc = nsldapi_dup_controls(ld, &ld->ld_clientcontrols,
		    (LDAPControl **)optdata);
		break;

	/* rebind proc */
	case LDAP_OPT_REBIND_FN:
		ld->ld_rebind_fn = (LDAP_REBINDPROC_CALLBACK *) optdata;
		break;
	case LDAP_OPT_REBIND_ARG:
		ld->ld_rebind_arg = (void *) optdata;
		break;

#ifdef LDAP_SSLIO_HOOKS
	/* i/o function pointers */
	case LDAP_OPT_IO_FN_PTRS:
		if ((rc = nsldapi_install_compat_io_fns(ld,
		    (struct ldap_io_fns *)optdata)) != LDAP_SUCCESS) {
			LDAP_SET_LDERRNO(ld, rc, NULL, NULL);
			rc = -1;
		}
		break;

	/* extended i/o function pointers */
	case LDAP_X_OPT_EXTIO_FN_PTRS:
	    /* denotes use of old iofns struct (no writev) */
	    if (((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_size ==
			LDAP_X_EXTIO_FNS_SIZE_REV0) {
		ld->ld_extio_size = LDAP_X_EXTIO_FNS_SIZE;
	    ld->ld_extclose_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_close;
	    ld->ld_extconnect_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_connect;
	    ld->ld_extread_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_read;
	    ld->ld_extwrite_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_write;
	    ld->ld_extpoll_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_poll;
	    ld->ld_extnewhandle_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_newhandle;
	    ld->ld_extdisposehandle_fn =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->
		lextiof_disposehandle;
	    ld->ld_ext_session_arg =
		((struct ldap_x_ext_io_fns_rev0 *)optdata)->lextiof_session_arg;
	    ld->ld_extwritev_fn = NULL;
	    if (ber_sockbuf_set_option(ld->ld_sbp, LBER_SOCKBUF_OPT_EXT_IO_FNS,
				&(ld->ld_ext_io_fns)) != 0) {
			return (LDAP_LOCAL_ERROR);
		}
	    } else {
	    /* struct copy */
		ld->ld_ext_io_fns = *((struct ldap_x_ext_io_fns *)optdata);
	    }
	    if ((rc = nsldapi_install_lber_extiofns(ld, ld->ld_sbp))
						!= LDAP_SUCCESS) {
		LDAP_SET_LDERRNO(ld, rc, NULL, NULL);
		rc = -1;
	    }
		break;
#endif

	/* thread function pointers */
	case LDAP_OPT_THREAD_FN_PTRS:
		/*
		 * It is only safe to set the thread function pointers
		 * when one thread is using the LDAP session handle.
		 */
		/* free existing mutexes (some are allocated by ldap_init()) */
		nsldapi_mutex_free_all(ld);

		/* struct copy */
		ld->ld_thread = *((struct ldap_thread_fns *)optdata);

		/* allocate new mutexes */
		nsldapi_mutex_alloc_all(ld);

		/* LDAP_OPTION_LOCK was never locked... so just return */
		return (rc);

	/* extra thread function pointers */
	case LDAP_OPT_EXTRA_THREAD_FN_PTRS:
	/* The extra thread funcs will only pick up the threadid */
	    ld->ld_thread2  = *((struct ldap_extra_thread_fns *)optdata);

	/* Reset the rest of the structure preserving the threadid fn */
	    ld->ld_mutex_trylock_fn =  (LDAP_TF_MUTEX_TRYLOCK_CALLBACK *)NULL;
	    ld->ld_sema_alloc_fn = (LDAP_TF_SEMA_ALLOC_CALLBACK *) NULL;
	    ld->ld_sema_free_fn = (LDAP_TF_SEMA_FREE_CALLBACK *) NULL;
	    ld->ld_sema_wait_fn = (LDAP_TF_SEMA_WAIT_CALLBACK *) NULL;
	    ld->ld_sema_post_fn = (LDAP_TF_SEMA_POST_CALLBACK *) NULL;

	/* We assume that only one thread is active when replacing */
	/* the threadid function.  We will now proceed and reset all */
	/* of the threadid/refcounts */
	    for (i = 0; i < LDAP_MAX_LOCK; i++) {
		ld->ld_mutex_threadid[i] = (void *) -1;
		ld->ld_mutex_refcnt[i] = 0;
	    }

	    return (rc);

	/* DNS function pointers */
	case LDAP_OPT_DNS_FN_PTRS:
		/* struct copy */
		ld->ld_dnsfn = *((struct ldap_dns_fns *)optdata);
		break;

	/* cache function pointers */
	case LDAP_OPT_CACHE_FN_PTRS:
		/* struct copy */
		ld->ld_cache = *((struct ldap_cache_fns *)optdata);
		break;
	case LDAP_OPT_CACHE_STRATEGY:
		ld->ld_cache_strategy = *((int *)optdata);
		break;
	case LDAP_OPT_CACHE_ENABLE:
		ld->ld_cache_on = *((int *)optdata);
		break;

	case LDAP_OPT_ERROR_NUMBER:
		LDAP_GET_LDERRNO(ld, &matched, &errstr);
		matched = nsldapi_strdup(matched);
		errstr = nsldapi_strdup(errstr);
		LDAP_SET_LDERRNO(ld, *((int *)optdata), matched, errstr);
		break;

	case LDAP_OPT_ERROR_STRING:
		rc = LDAP_GET_LDERRNO(ld, &matched, NULL);
		matched = nsldapi_strdup(matched);
		LDAP_SET_LDERRNO(ld, rc, matched,
		    nsldapi_strdup((char *)optdata));
		rc = LDAP_SUCCESS;
		break;

	case LDAP_OPT_MATCHED_DN:
		rc = LDAP_GET_LDERRNO(ld, NULL, &errstr);
		errstr = nsldapi_strdup(errstr);
		LDAP_SET_LDERRNO(ld, rc,
		    nsldapi_strdup((char *)optdata), errstr);
		rc = LDAP_SUCCESS;
		break;

	case LDAP_OPT_PREFERRED_LANGUAGE:
		if (NULL != ld->ld_preferred_language) {
			NSLDAPI_FREE(ld->ld_preferred_language);
		}
		ld->ld_preferred_language = nsldapi_strdup((char *)optdata);
		break;

	case LDAP_OPT_HOST_NAME:
		if (NULL != ld->ld_defhost) {
			NSLDAPI_FREE(ld->ld_defhost);
		}
		ld->ld_defhost = nsldapi_strdup((char *)optdata);
		break;

	case LDAP_X_OPT_CONNECT_TIMEOUT:
		ld->ld_connect_timeout = *((int *)optdata);
		break;

#ifdef _SOLARIS_SDK
	/* recursion prevention dns functions */
	case LDAP_X_OPT_DNS_SKIPDB:
		rc = prldap_x_install_dns_skipdb(ld, (const char *)optdata);
		break;
#endif
#ifdef LDAP_SASLIO_HOOKS
	/* SASL options */
	case LDAP_OPT_X_SASL_MECH:
		if (NULL != ld->ld_def_sasl_mech) {

			NSLDAPI_FREE(ld->ld_def_sasl_mech);
		}
		ld->ld_def_sasl_mech = nsldapi_strdup((char *)optdata);
		break;
	case LDAP_OPT_X_SASL_REALM:
		if (NULL != ld->ld_def_sasl_realm) {
			NSLDAPI_FREE(ld->ld_def_sasl_realm);
		}
		ld->ld_def_sasl_realm = nsldapi_strdup((char *)optdata);
		break;
	case LDAP_OPT_X_SASL_AUTHCID:
		if (NULL != ld->ld_def_sasl_authcid) {
			NSLDAPI_FREE(ld->ld_def_sasl_authcid);
		}
		ld->ld_def_sasl_authcid = nsldapi_strdup((char *)optdata);
		break;
	case LDAP_OPT_X_SASL_AUTHZID:
		if (NULL != ld->ld_def_sasl_authzid) {
			NSLDAPI_FREE(ld->ld_def_sasl_authzid);
		}
		ld->ld_def_sasl_authzid = nsldapi_strdup((char *)optdata);
		break;
	case LDAP_OPT_X_SASL_SSF_EXTERNAL:
		{
		    int sc;
		    sasl_ssf_t extprops;
		    sasl_conn_t *ctx;
		    if (ld->ld_defconn == NULL ||
			ld->ld_defconn->lconn_sb == NULL) {
			return (-1);
		    }
		    ctx = (sasl_conn_t *)
				(ld->ld_defconn->lconn_sb->sb_sasl_ctx);
		    if (ctx == NULL) {
			return (-1);
		    }
		    memset(&extprops, 0L, sizeof (extprops));
		    extprops = * ((sasl_ssf_t *)optdata);
		    sc = sasl_setprop(ctx, SASL_SSF_EXTERNAL,
				(void *) &extprops);
		    if (sc != SASL_OK) {
			return (-1);
		    }
		}
		break;
	case LDAP_OPT_X_SASL_SECPROPS:
		{
			int sc;
			sc = nsldapi_sasl_secprops((char *)optdata,
				&ld->ld_sasl_secprops);
			return (sc == LDAP_SUCCESS ? 0 : -1);
		}
	case LDAP_OPT_X_SASL_SSF_MIN:
		ld->ld_sasl_secprops.min_ssf = *((sasl_ssf_t *)optdata);
		break;
	case LDAP_OPT_X_SASL_SSF_MAX:
		ld->ld_sasl_secprops.max_ssf = *((sasl_ssf_t *)optdata);
		break;
	case LDAP_OPT_X_SASL_MAXBUFSIZE:
		ld->ld_sasl_secprops.maxbufsize = *((sasl_ssf_t *)optdata);
		break;
	case LDAP_OPT_X_SASL_SSF:	/* read only */
		LDAP_SET_LDERRNO(ld, LDAP_PARAM_ERROR, NULL, NULL);
		rc = -1;
		break;
#endif

	default:
		LDAP_SET_LDERRNO(ld, LDAP_PARAM_ERROR, NULL, NULL);
		rc = -1;
	}

	if (ld != &nsldapi_ld_defaults) {
	    LDAP_MUTEX_UNLOCK(ld, LDAP_OPTION_LOCK);
	}
	return (rc);
}