xref: /onnv-gate/usr/src/cmd/idmap/idmapd/idmap_config.c (revision 12065:0e89d02a32ea)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 */


/*
 * Config routines common to idmap(1M) and idmapd(1M)
 */

#include <stdlib.h>
#include <strings.h>
#include <libintl.h>
#include <ctype.h>
#include <errno.h>
#include "idmapd.h"
#include <stdio.h>
#include <stdarg.h>
#include <uuid/uuid.h>
#include <pthread.h>
#include <port.h>
#include <net/route.h>
#include <sys/u8_textprep.h>
#include "addisc.h"

#define	MACHINE_SID_LEN		(9 + 3 * 11)
#define	FMRI_BASE		"svc:/system/idmap"
#define	CONFIG_PG		"config"
#define	GENERAL_PG		"general"
#define	RECONFIGURE		1
#define	POKE_AUTO_DISCOVERY	2

enum event_type {
	EVENT_NOTHING,	/* Woke up for no good reason */
	EVENT_TIMEOUT,	/* Timeout expired */
	EVENT_ROUTING,	/* An interesting routing event happened */
	EVENT_DEGRADE,	/* An error occurred in the mainline */
	EVENT_REFRESH,	/* SMF refresh */
};

/*LINTLIBRARY*/


static pthread_t update_thread_handle = 0;

static int idmapd_ev_port = -1;
static int rt_sock = -1;

struct enum_lookup_map directory_mapping_map[] = {
	{ DIRECTORY_MAPPING_NONE, "none" },
	{ DIRECTORY_MAPPING_NAME, "name" },
	{ DIRECTORY_MAPPING_IDMU, "idmu" },
	{ 0, NULL },
};

static int
generate_machine_sid(char **machine_sid)
{
	char *p;
	uuid_t uu;
	int i, j, len, rlen;
	uint32_t rid;

	/*
	 * Generate and split 128-bit UUID into three 32-bit RIDs The
	 * machine_sid will be of the form S-1-5-21-N1-N2-N3 (that's
	 * four RIDs altogether).
	 *
	 * Technically we could use up to 14 random RIDs here, but it
	 * turns out that with some versions of Windows using SIDs with
	 * more than  five RIDs in security descriptors causes problems.
	 */

	*machine_sid = calloc(1, MACHINE_SID_LEN);
	if (*machine_sid == NULL) {
		idmapdlog(LOG_ERR, "Out of memory");
		return (-1);
	}
	(void) strcpy(*machine_sid, "S-1-5-21");
	p = *machine_sid + strlen("S-1-5-21");
	len = MACHINE_SID_LEN - strlen("S-1-5-21");

	uuid_clear(uu);
	uuid_generate_random(uu);

#if UUID_LEN != 16
#error UUID size is not 16!
#endif

	for (i = 0; i < 3; i++) {
		j = i * 4;
		rid = (uu[j] << 24) | (uu[j + 1] << 16) |
		    (uu[j + 2] << 8) | (uu[j + 3]);
		rlen = snprintf(p, len, "-%u", rid);
		p += rlen;
		len -= rlen;
	}

	return (0);
}


/* In the case of error, exists is set to FALSE anyway */
static int
prop_exists(idmap_cfg_handles_t *handles, const char *name, boolean_t *exists)
{

	scf_property_t *scf_prop;
	scf_value_t *value;

	*exists = B_FALSE;

	scf_prop = scf_property_create(handles->main);
	if (scf_prop == NULL) {
		idmapdlog(LOG_ERR, "scf_property_create() failed: %s",
		    scf_strerror(scf_error()));
		return (-1);
	}
	value = scf_value_create(handles->main);
	if (value == NULL) {
		idmapdlog(LOG_ERR, "scf_value_create() failed: %s",
		    scf_strerror(scf_error()));
		scf_property_destroy(scf_prop);
		return (-1);
	}

	if (scf_pg_get_property(handles->config_pg, name, scf_prop) == 0)
		*exists = B_TRUE;

	scf_value_destroy(value);
	scf_property_destroy(scf_prop);

	return (0);
}

/* Check if in the case of failure the original value of *val is preserved */
static int
get_val_int(idmap_cfg_handles_t *handles, const char *name,
	void *val, scf_type_t type)
{
	int rc = 0;

	scf_property_t *scf_prop;
	scf_value_t *value;
	uint8_t b;

	switch (type) {
	case SCF_TYPE_BOOLEAN:
		*(boolean_t *)val = B_FALSE;
		break;
	case SCF_TYPE_COUNT:
		*(uint64_t *)val = 0;
		break;
	case SCF_TYPE_INTEGER:
		*(int64_t *)val = 0;
		break;
	default:
		idmapdlog(LOG_ERR, "Invalid scf integer type (%d)",
		    type);
		abort();
	}

	scf_prop = scf_property_create(handles->main);
	if (scf_prop == NULL) {
		idmapdlog(LOG_ERR, "scf_property_create() failed: %s",
		    scf_strerror(scf_error()));
		return (-1);
	}
	value = scf_value_create(handles->main);
	if (value == NULL) {
		idmapdlog(LOG_ERR, "scf_value_create() failed: %s",
		    scf_strerror(scf_error()));
		scf_property_destroy(scf_prop);
		return (-1);
	}

	if (scf_pg_get_property(handles->config_pg, name, scf_prop) < 0)
	/* this is OK: the property is just undefined */
		goto destruction;


	if (scf_property_get_value(scf_prop, value) < 0)
	/* It is still OK when a property doesn't have any value */
		goto destruction;

	switch (type) {
	case SCF_TYPE_BOOLEAN:
		rc = scf_value_get_boolean(value, &b);
		*(boolean_t *)val = b;
		break;
	case SCF_TYPE_COUNT:
		rc = scf_value_get_count(value, val);
		break;
	case SCF_TYPE_INTEGER:
		rc = scf_value_get_integer(value, val);
		break;
	default:
		abort();	/* tested above */
		/* NOTREACHED */
	}

	if (rc != 0) {
		idmapdlog(LOG_ERR, "Can not retrieve config/%s:  %s",
		    name, scf_strerror(scf_error()));
	}

destruction:
	scf_value_destroy(value);
	scf_property_destroy(scf_prop);

	return (rc);
}

static char *
scf_value2string(const char *name, scf_value_t *value)
{
	static size_t max_val = 0;

	if (max_val == 0)
		max_val = scf_limit(SCF_LIMIT_MAX_VALUE_LENGTH);

	char buf[max_val + 1];
	if (scf_value_get_astring(value, buf, max_val + 1) < 0) {
		idmapdlog(LOG_ERR, "Can not retrieve config/%s:  %s",
		    name, scf_strerror(scf_error()));
		return (NULL);
	}

	char *s = strdup(buf);
	if (s == NULL)
		idmapdlog(LOG_ERR, "Out of memory");

	return (s);
}

static int
get_val_ds(idmap_cfg_handles_t *handles, const char *name, int defport,
		idmap_ad_disc_ds_t **val)
{
	idmap_ad_disc_ds_t *servers = NULL;
	scf_property_t *scf_prop;
	scf_value_t *value;
	scf_iter_t *iter;
	char *host, *portstr;
	int len, i;
	int count = 0;
	int rc = -1;

	*val = NULL;

restart:
	scf_prop = scf_property_create(handles->main);
	if (scf_prop == NULL) {
		idmapdlog(LOG_ERR, "scf_property_create() failed: %s",
		    scf_strerror(scf_error()));
		return (-1);
	}

	value = scf_value_create(handles->main);
	if (value == NULL) {
		idmapdlog(LOG_ERR, "scf_value_create() failed: %s",
		    scf_strerror(scf_error()));
		scf_property_destroy(scf_prop);
		return (-1);
	}

	iter = scf_iter_create(handles->main);
	if (iter == NULL) {
		idmapdlog(LOG_ERR, "scf_iter_create() failed: %s",
		    scf_strerror(scf_error()));
		scf_value_destroy(value);
		scf_property_destroy(scf_prop);
		return (-1);
	}

	if (scf_pg_get_property(handles->config_pg, name, scf_prop) < 0) {
		/* this is OK: the property is just undefined */
		rc = 0;
		goto destruction;
	}

	if (scf_iter_property_values(iter, scf_prop) < 0) {
		idmapdlog(LOG_ERR,
		    "scf_iter_property_values(%s) failed: %s",
		    name, scf_strerror(scf_error()));
		goto destruction;
	}

	/* Workaround scf bugs -- can't reset an iteration */
	if (count == 0) {
		while (scf_iter_next_value(iter, value) > 0)
			count++;

		if (count == 0) {
			/* no values */
			rc = 0;
			goto destruction;
		}

		scf_value_destroy(value);
		scf_iter_destroy(iter);
		scf_property_destroy(scf_prop);
		goto restart;
	}

	if ((servers = calloc(count + 1, sizeof (*servers))) == NULL) {
		idmapdlog(LOG_ERR, "Out of memory");
		goto destruction;
	}

	i = 0;
	while (i < count && scf_iter_next_value(iter, value) > 0) {
		servers[i].priority = 0;
		servers[i].weight = 100;
		servers[i].port = defport;
		if ((host = scf_value2string(name, value)) == NULL) {
			goto destruction;
		}
		if ((portstr = strchr(host, ':')) != NULL) {
			*portstr++ = '\0';
			servers[i].port = strtol(portstr,
			    (char **)NULL, 10);
			if (servers[i].port == 0)
				servers[i].port = defport;
		}
		len = strlcpy(servers[i].host, host,
		    sizeof (servers->host));

		free(host);

		/* Ignore this server if the hostname is too long */
		if (len < sizeof (servers->host))
			i++;
	}

	*val = servers;

	rc = 0;

destruction:
	scf_value_destroy(value);
	scf_iter_destroy(iter);
	scf_property_destroy(scf_prop);

	if (rc < 0) {
		if (servers)
			free(servers);
		*val = NULL;
	}

	return (rc);
}


static int
get_val_astring(idmap_cfg_handles_t *handles, const char *name, char **val)
{
	int rc = 0;

	scf_property_t *scf_prop;
	scf_value_t *value;

	scf_prop = scf_property_create(handles->main);
	if (scf_prop == NULL) {
		idmapdlog(LOG_ERR, "scf_property_create() failed: %s",
		    scf_strerror(scf_error()));
		return (-1);
	}
	value = scf_value_create(handles->main);
	if (value == NULL) {
		idmapdlog(LOG_ERR, "scf_value_create() failed: %s",
		    scf_strerror(scf_error()));
		scf_property_destroy(scf_prop);
		return (-1);
	}

	*val = NULL;

	if (scf_pg_get_property(handles->config_pg, name, scf_prop) < 0)
	/* this is OK: the property is just undefined */
		goto destruction;

	if (scf_property_get_value(scf_prop, value) < 0) {
		idmapdlog(LOG_ERR,
		    "scf_property_get_value(%s) failed: %s",
		    name, scf_strerror(scf_error()));
		rc = -1;
		goto destruction;
	}

	*val = scf_value2string(name, value);
	if (*val == NULL)
		rc = -1;

destruction:
	scf_value_destroy(value);
	scf_property_destroy(scf_prop);

	if (rc < 0) {
		if (*val)
			free(*val);
		*val = NULL;
	}

	return (rc);
}


static int
del_val(idmap_cfg_handles_t *handles, const char *name)
{
	int			rc = -1;
	int			ret;
	scf_transaction_t	*tx = NULL;
	scf_transaction_entry_t	*ent = NULL;

	if ((tx = scf_transaction_create(handles->main)) == NULL) {
		idmapdlog(LOG_ERR,
		    "scf_transaction_create() failed: %s",
		    scf_strerror(scf_error()));
		goto destruction;
	}
	if ((ent = scf_entry_create(handles->main)) == NULL) {
		idmapdlog(LOG_ERR,
		    "scf_entry_create() failed: %s",
		    scf_strerror(scf_error()));
		goto destruction;
	}

	do {
		if (scf_pg_update(handles->config_pg) == -1) {
			idmapdlog(LOG_ERR,
			    "scf_pg_update(%s) failed: %s",
			    name, scf_strerror(scf_error()));
			goto destruction;
		}
		if (scf_transaction_start(tx, handles->config_pg) != 0) {
			idmapdlog(LOG_ERR,
			    "scf_transaction_start(%s) failed: %s",
			    name, scf_strerror(scf_error()));
			goto destruction;
		}

		if (scf_transaction_property_delete(tx, ent, name) != 0) {
			/* Don't complain if it already doesn't exist. */
			if (scf_error() != SCF_ERROR_NOT_FOUND) {
				idmapdlog(LOG_ERR,
				    "scf_transaction_property_delete() failed:"
				    " %s",
				    scf_strerror(scf_error()));
			}
			goto destruction;
		}

		ret = scf_transaction_commit(tx);

		if (ret == 0)
			scf_transaction_reset(tx);
	} while (ret == 0);

	if (ret == -1) {
		idmapdlog(LOG_ERR,
		    "scf_transaction_commit(%s) failed: %s",
		    name, scf_strerror(scf_error()));
		goto destruction;
	}

	rc = 0;

destruction:
	if (ent != NULL)
		scf_entry_destroy(ent);
	if (tx != NULL)
		scf_transaction_destroy(tx);
	return (rc);
}


static int
set_val_astring(idmap_cfg_handles_t *handles, const char *name, const char *val)
{
	int			rc = -1;
	int			ret = -2;
	int			i;
	scf_property_t		*scf_prop = NULL;
	scf_value_t		*value = NULL;
	scf_transaction_t	*tx = NULL;
	scf_transaction_entry_t	*ent = NULL;

	if ((scf_prop = scf_property_create(handles->main)) == NULL ||
	    (value = scf_value_create(handles->main)) == NULL ||
	    (tx = scf_transaction_create(handles->main)) == NULL ||
	    (ent = scf_entry_create(handles->main)) == NULL) {
		idmapdlog(LOG_ERR, "Unable to set property %s",
		    name, scf_strerror(scf_error()));
		goto destruction;
	}

	for (i = 0; i < MAX_TRIES && (ret == -2 || ret == 0); i++) {
		if (scf_transaction_start(tx, handles->config_pg) == -1) {
			idmapdlog(LOG_ERR,
			    "scf_transaction_start(%s) failed: %s",
			    name, scf_strerror(scf_error()));
			goto destruction;
		}

		if (scf_transaction_property_new(tx, ent, name,
		    SCF_TYPE_ASTRING) < 0) {
			idmapdlog(LOG_ERR,
			    "scf_transaction_property_new() failed: %s",
			    scf_strerror(scf_error()));
			goto destruction;
		}

		if (scf_value_set_astring(value, val) == -1) {
			idmapdlog(LOG_ERR,
			    "scf_value_set_astring() failed: %s",
			    scf_strerror(scf_error()));
			goto destruction;
		}

		if (scf_entry_add_value(ent, value) == -1) {
			idmapdlog(LOG_ERR,
			    "scf_entry_add_value() failed: %s",
			    scf_strerror(scf_error()));
			goto destruction;
		}

		if ((ret = scf_transaction_commit(tx)) == 1)
			break;

		if (ret == 0 && i < MAX_TRIES - 1) {
			/*
			 * Property group set in scf_transaction_start()
			 * is not the most recent. Update pg, reset tx and
			 * retry tx.
			 */
			idmapdlog(LOG_WARNING,
			    "scf_transaction_commit(%s) failed - Retry: %s",
			    name, scf_strerror(scf_error()));
			if (scf_pg_update(handles->config_pg) == -1) {
				idmapdlog(LOG_ERR,
				    "scf_pg_update() failed: %s",
				    scf_strerror(scf_error()));
				goto destruction;
			}
			scf_transaction_reset(tx);
		}
	}


	if (ret == 1)
		rc = 0;
	else if (ret != -2)
		idmapdlog(LOG_ERR,
		    "scf_transaction_commit(%s) failed: %s",
		    name, scf_strerror(scf_error()));

destruction:
	scf_value_destroy(value);
	scf_entry_destroy(ent);
	scf_transaction_destroy(tx);
	scf_property_destroy(scf_prop);
	return (rc);
}



/*
 * This function updates a boolean value.
 * If nothing has changed it returns 0 else 1
 */
static int
update_bool(boolean_t *value, boolean_t *new, char *name)
{
	if (*value == *new)
		return (0);

	idmapdlog(LOG_INFO, "change %s=%s", name, *new ? "true" : "false");
	*value = *new;
	return (1);
}


/*
 * This function updates a string value.
 * If nothing has changed it returns 0 else 1
 */
static int
update_string(char **value, char **new, char *name)
{
	if (*new == NULL)
		return (0);

	if (*value != NULL && strcmp(*new, *value) == 0) {
		free(*new);
		*new = NULL;
		return (0);
	}

	idmapdlog(LOG_INFO, "change %s=%s", name, CHECK_NULL(*new));
	if (*value != NULL)
		free(*value);
	*value = *new;
	*new = NULL;
	return (1);
}

static int
update_enum(int *value, int *new, char *name, struct enum_lookup_map *map)
{
	if (*value == *new)
		return (0);

	idmapdlog(LOG_INFO, "change %s=%s", name, enum_lookup(*new, map));

	*value = *new;

	return (1);
}

/*
 * This function updates a directory service structure.
 * If nothing has changed it returns 0 else 1
 */
static int
update_dirs(idmap_ad_disc_ds_t **value, idmap_ad_disc_ds_t **new, char *name)
{
	int i;

	if (*value == *new)
		/* Nothing to do */
		return (0);

	if (*value != NULL && *new != NULL &&
	    ad_disc_compare_ds(*value, *new) == 0) {
		free(*new);
		*new = NULL;
		return (0);
	}

	if (*value != NULL)
		free(*value);

	*value = *new;
	*new = NULL;

	if (*value == NULL) {
		/* We're unsetting this DS property */
		idmapdlog(LOG_INFO, "change %s=<none>", name);
		return (1);
	}

	/* List all the new DSs */
	for (i = 0; (*value)[i].host[0] != '\0'; i++)
		idmapdlog(LOG_INFO, "change %s=%s port=%d", name,
		    (*value)[i].host, (*value)[i].port);
	return (1);
}

/*
 * This function updates a trusted domains structure.
 * If nothing has changed it returns 0 else 1
 */
static int
update_trusted_domains(ad_disc_trusteddomains_t **value,
			ad_disc_trusteddomains_t **new, char *name)
{
	int i;

	if (*value == *new)
		/* Nothing to do */
		return (0);

	if (*value != NULL && *new != NULL &&
	    ad_disc_compare_trusteddomains(*value, *new) == 0) {
		free(*new);
		*new = NULL;
		return (0);
	}

	if (*value != NULL)
		free(*value);

	*value = *new;
	*new = NULL;

	if (*value == NULL) {
		/* We're unsetting this DS property */
		idmapdlog(LOG_INFO, "change %s=<none>", name);
		return (1);
	}

	/* List all the new domains */
	for (i = 0; (*value)[i].domain[0] != '\0'; i++)
		idmapdlog(LOG_INFO, "change %s=%s direction=%s", name,
		    (*value)[i].domain,
		    (*value)[i].direction == 3 ? "bi-directional" : "inbound");
	return (1);
}


/*
 * This function updates a domains in a forest structure.
 * If nothing has changed it returns 0 else 1
 */
static int
update_domains_in_forest(ad_disc_domainsinforest_t **value,
			ad_disc_domainsinforest_t **new, char *name)
{
	int i;

	if (*value == *new)
		/* Nothing to do */
		return (0);

	if (*value != NULL && *new != NULL &&
	    ad_disc_compare_domainsinforest(*value, *new) == 0) {
		free(*new);
		*new = NULL;
		return (0);
	}

	if (*value != NULL)
		free(*value);

	*value = *new;
	*new = NULL;

	if (*value == NULL) {
		/* We're unsetting this DS property */
		idmapdlog(LOG_INFO, "change %s=<none>", name);
		return (1);
	}

	/* List all the new domains */
	for (i = 0; (*value)[i].domain[0] != '\0'; i++)
		idmapdlog(LOG_INFO, "change %s=%s", name,
		    (*value)[i].domain);
	return (1);
}


static void
free_trusted_forests(idmap_trustedforest_t **value, int *num_values)
{
	int i;

	for (i = 0; i < *num_values; i++) {
		free((*value)[i].forest_name);
		free((*value)[i].global_catalog);
		free((*value)[i].domains_in_forest);
	}
	free(*value);
	*value = NULL;
	*num_values = 0;
}


static int
compare_trusteddomainsinforest(ad_disc_domainsinforest_t *df1,
			ad_disc_domainsinforest_t *df2)
{
	int		i, j;
	int		num_df1 = 0;
	int		num_df2 = 0;
	boolean_t	match;

	for (i = 0; df1[i].domain[0] != '\0'; i++)
		if (df1[i].trusted)
			num_df1++;

	for (j = 0; df2[j].domain[0] != '\0'; j++)
		if (df2[j].trusted)
			num_df2++;

	if (num_df1 != num_df2)
		return (1);

	for (i = 0; df1[i].domain[0] != '\0'; i++) {
		if (df1[i].trusted) {
			match = B_FALSE;
			for (j = 0; df2[j].domain[0] != '\0'; j++) {
				if (df2[j].trusted &&
				    domain_eq(df1[i].domain, df2[j].domain) &&
				    strcmp(df1[i].sid, df2[j].sid) == 0) {
					match = B_TRUE;
					break;
				}
			}
			if (!match)
				return (1);
		}
	}
	return (0);
}



/*
 * This function updates trusted forest structure.
 * If nothing has changed it returns 0 else 1
 */
static int
update_trusted_forest(idmap_trustedforest_t **value, int *num_value,
			idmap_trustedforest_t **new, int *num_new, char *name)
{
	int i, j;
	boolean_t match;

	if (*value == *new)
		/* Nothing to do */
		return (0);

	if (*value != NULL && *new != NULL) {
		if (*num_value != *num_new)
			goto not_equal;
		for (i = 0; i < *num_value; i++) {
			match = B_FALSE;
			for (j = 0; j < *num_new; j++) {
				if (strcmp((*value)[i].forest_name,
				    (*new)[j].forest_name) == 0 &&
				    ad_disc_compare_ds(
				    (*value)[i].global_catalog,
				    (*new)[j].global_catalog) == 0 &&
				    compare_trusteddomainsinforest(
				    (*value)[i].domains_in_forest,
				    (*new)[j].domains_in_forest) == 0) {
					match = B_TRUE;
					break;
				}
			}
			if (!match)
				goto not_equal;
		}
		free_trusted_forests(new, num_new);
		return (0);
	}
not_equal:
	if (*value != NULL)
		free_trusted_forests(value, num_value);
	*value = *new;
	*num_value = *num_new;
	*new = NULL;
	*num_new = 0;

	if (*value == NULL) {
		/* We're unsetting this DS property */
		idmapdlog(LOG_INFO, "change %s=<none>", name);
		return (1);
	}

	/* List all the trusted forests */
	for (i = 0; i < *num_value; i++) {
		for (j = 0; (*value)[i].domains_in_forest[j].domain[0] != '\0';
		    j++) {
			/* List trusted Domains in the forest. */
			if ((*value)[i].domains_in_forest[j].trusted)
				idmapdlog(LOG_INFO, "change %s=%s domain=%s",
				    name, (*value)[i].forest_name,
				    (*value)[i].domains_in_forest[j].domain);
		}
		/* List the hosts */
		for (j = 0; (*value)[i].global_catalog[j].host[0] != '\0'; j++)
			idmapdlog(LOG_INFO, "change %s=%s host=%s port=%d",
			    name, (*value)[i].forest_name,
			    (*value)[i].global_catalog[j].host,
			    (*value)[i].global_catalog[j].port);
	}
	return (1);
}

const char *
enum_lookup(int value, struct enum_lookup_map *map)
{
	for (; map->string != NULL; map++) {
		if (value == map->value) {
			return (map->string);
		}
	}
	return ("(invalid)");
}

/*
 * Returns 1 if the PF_ROUTE socket event indicates that we should rescan the
 * interfaces.
 *
 * Shamelessly based on smb_nics_changed() and other PF_ROUTE uses in ON.
 */
static
boolean_t
pfroute_event_is_interesting(int rt_sock)
{
	int nbytes;
	int64_t msg[2048 / 8];
	struct rt_msghdr *rtm;
	boolean_t is_interesting = B_FALSE;

	for (;;) {
		if ((nbytes = read(rt_sock, msg, sizeof (msg))) <= 0)
			break;
		rtm = (struct rt_msghdr *)msg;
		if (rtm->rtm_version != RTM_VERSION)
			continue;
		if (nbytes < rtm->rtm_msglen)
			continue;
		switch (rtm->rtm_type) {
		case RTM_NEWADDR:
		case RTM_DELADDR:
		case RTM_IFINFO:
			is_interesting = B_TRUE;
			break;
		default:
			break;
		}
	}
	return (is_interesting);
}

/*
 * Wait for an event, and report what kind of event occurred.
 *
 * Note that there are cases where we are awoken but don't care about
 * the lower-level event.  We can't just loop here because we can't
 * readily calculate how long to sleep the next time.  We return
 * EVENT_NOTHING and let the caller loop.
 */
static
enum event_type
wait_for_event(struct timespec *timeoutp)
{
	port_event_t pe;

	memset(&pe, 0, sizeof (pe));
	if (port_get(idmapd_ev_port, &pe, timeoutp) != 0) {
		switch (errno) {
		case EINTR:
			return (EVENT_NOTHING);
		case ETIME:
			/* Timeout */
			return (EVENT_TIMEOUT);
		default:
			/* EBADF, EBADFD, EFAULT, EINVAL (end of time?)? */
			idmapdlog(LOG_ERR, "Event port failed: %s",
			    strerror(errno));
			exit(1);
			/* NOTREACHED */
		}
	}


	switch (pe.portev_source) {
	case 0:
		/*
		 * This isn't documented, but seems to be what you get if
		 * the timeout is zero seconds and there are no events
		 * pending.
		 */
		return (EVENT_TIMEOUT);

	case PORT_SOURCE_USER:
		if (pe.portev_events == POKE_AUTO_DISCOVERY)
			return (EVENT_DEGRADE);
		if (pe.portev_events == RECONFIGURE)
			return (EVENT_REFRESH);
		break;

	case PORT_SOURCE_FD:
		if (pe.portev_object == rt_sock) {
			/*
			 * PF_ROUTE socket read event:
			 *    re-associate fd
			 *    handle event
			 */
			if (port_associate(idmapd_ev_port, PORT_SOURCE_FD,
			    rt_sock, POLLIN, NULL) != 0) {
				idmapdlog(LOG_ERR, "Failed to re-associate the "
				    "routing socket with the event port: %s",
				    strerror(errno));
				abort();
			}
			/*
			 * The network configuration may still be in flux.
			 * No matter, the resolver will re-transmit and
			 * timeout if need be.
			 */
			if (pfroute_event_is_interesting(rt_sock)) {
				idmapdlog(LOG_DEBUG,
				    "Interesting routing event");
				return (EVENT_ROUTING);
			} else {
				idmapdlog(LOG_DEBUG,
				    "Boring routing event");
				return (EVENT_NOTHING);
			}
		}
		/* Event on an FD other than the routing FD? Ignore it. */
		break;
	}

	return (EVENT_NOTHING);
}

void *
idmap_cfg_update_thread(void *arg)
{

	const ad_disc_t		ad_ctx = _idmapdstate.cfg->handles.ad_ctx;

	for (;;) {
		struct timespec timeout;
		struct timespec	*timeoutp;
		int		rc;
		int		ttl;

		(void) ad_disc_SubnetChanged(ad_ctx);

		rc = idmap_cfg_load(_idmapdstate.cfg, CFG_DISCOVER);
		if (rc < -1) {
			idmapdlog(LOG_ERR, "Fatal errors while reading "
			    "SMF properties");
			exit(1);
		} else if (rc == -1) {
			idmapdlog(LOG_WARNING,
			    "Errors re-loading configuration may cause AD "
			    "lookups to fail");
		}

		/*
		 * Wait for an interesting event.  Note that we might get
		 * boring events between interesting events.  If so, we loop.
		 */
		for (;;) {
			ttl = ad_disc_get_TTL(ad_ctx);

			if (ttl < 0) {
				timeoutp = NULL;
			} else {
				timeoutp = &timeout;
				timeout.tv_sec = ttl;
				timeout.tv_nsec = 0;
			}

			switch (wait_for_event(timeoutp)) {
			case EVENT_NOTHING:
				idmapdlog(LOG_DEBUG, "Boring event.");
				continue;
			case EVENT_REFRESH:
				idmapdlog(LOG_INFO, "SMF refresh");
				/*
				 * Blow away the ccache, we might have
				 * re-joined the domain or joined a new one
				 */
				(void) unlink(IDMAP_CACHEDIR "/ccache");
				break;
			case EVENT_DEGRADE:
				idmapdlog(LOG_DEBUG,
				    "Service degraded");
				break;
			case EVENT_TIMEOUT:
				idmapdlog(LOG_DEBUG, "TTL expired");
				break;
			case EVENT_ROUTING:
				/* Already logged to DEBUG */
				break;
			}
			/* An interesting event! */
			break;
		}
	}
	/*
	 * Lint isn't happy with the concept of a function declared to
	 * return something, that doesn't return.  Of course, merely adding
	 * the return isn't enough, because it's never reached...
	 */
	/*NOTREACHED*/
	return (NULL);
}

int
idmap_cfg_start_updates(void)
{
	if ((idmapd_ev_port = port_create()) < 0) {
		idmapdlog(LOG_ERR, "Failed to create event port: %s",
		    strerror(errno));
		return (-1);
	}

	if ((rt_sock = socket(PF_ROUTE, SOCK_RAW, 0)) < 0) {
		idmapdlog(LOG_ERR, "Failed to open routing socket: %s",
		    strerror(errno));
		(void) close(idmapd_ev_port);
		return (-1);
	}

	if (fcntl(rt_sock, F_SETFL, O_NDELAY|O_NONBLOCK) < 0) {
		idmapdlog(LOG_ERR, "Failed to set routing socket flags: %s",
		    strerror(errno));
		(void) close(rt_sock);
		(void) close(idmapd_ev_port);
		return (-1);
	}

	if (port_associate(idmapd_ev_port, PORT_SOURCE_FD,
	    rt_sock, POLLIN, NULL) != 0) {
		idmapdlog(LOG_ERR, "Failed to associate the routing "
		    "socket with the event port: %s", strerror(errno));
		(void) close(rt_sock);
		(void) close(idmapd_ev_port);
		return (-1);
	}

	if ((errno = pthread_create(&update_thread_handle, NULL,
	    idmap_cfg_update_thread, NULL)) != 0) {
		idmapdlog(LOG_ERR, "Failed to start update thread: %s",
		    strerror(errno));
		(void) port_dissociate(idmapd_ev_port, PORT_SOURCE_FD, rt_sock);
		(void) close(rt_sock);
		(void) close(idmapd_ev_port);
		return (-1);
	}

	return (0);
}

/*
 * Reject attribute names with invalid characters.
 */
static
int
valid_ldap_attr(const char *attr) {
	for (; *attr; attr++) {
		if (!isalnum(*attr) && *attr != '-' &&
		    *attr != '_' && *attr != '.' && *attr != ';')
			return (0);
	}
	return (1);
}

static
int
check_smf_debug_mode(idmap_cfg_handles_t *handles)
{
	boolean_t new_debug_mode;
	int rc;

	rc = prop_exists(handles, "debug", &new_debug_mode);
	if (rc != 0)
		return (rc);

	if (_idmapdstate.debug_mode != new_debug_mode) {
		if (!_idmapdstate.debug_mode) {
			_idmapdstate.debug_mode = new_debug_mode;
			idmap_log_stderr(LOG_DEBUG);
			idmapdlog(LOG_DEBUG, "debug mode enabled");
		} else {
			idmapdlog(LOG_DEBUG, "debug mode disabled");
			idmap_log_stderr(-1);
			_idmapdstate.debug_mode = new_debug_mode;
		}
	}

	return (0);
}

/*
 * This is the half of idmap_cfg_load() that loads property values from
 * SMF (using the config/ property group of the idmap FMRI).
 *
 * Return values: 0 -> success, -1 -> failure, -2 -> hard failures
 *               -3 -> hard smf config failures
 * reading from SMF.
 */
static
int
idmap_cfg_load_smf(idmap_cfg_handles_t *handles, idmap_pg_config_t *pgcfg,
	int * const errors)
{
	int rc;
	char *s;

	*errors = 0;

	if (scf_pg_update(handles->config_pg) < 0) {
		idmapdlog(LOG_ERR, "scf_pg_update() failed: %s",
		    scf_strerror(scf_error()));
		return (-2);
	}

	if (scf_pg_update(handles->general_pg) < 0) {
		idmapdlog(LOG_ERR, "scf_pg_update() failed: %s",
		    scf_strerror(scf_error()));
		return (-2);
	}

	rc = check_smf_debug_mode(handles);
	if (rc != 0)
		(*errors)++;

	rc = get_val_int(handles, "unresolvable_sid_mapping",
	    &pgcfg->eph_map_unres_sids, SCF_TYPE_BOOLEAN);
	if (rc != 0)
		(*errors)++;

	rc = get_val_astring(handles, "directory_based_mapping", &s);
	if (rc != 0)
		(*errors)++;
	else if (s == NULL || strcasecmp(s, "none") == 0)
		pgcfg->directory_based_mapping = DIRECTORY_MAPPING_NONE;
	else if (strcasecmp(s, "name") == 0)
		pgcfg->directory_based_mapping = DIRECTORY_MAPPING_NAME;
	else if (strcasecmp(s, "idmu") == 0)
		pgcfg->directory_based_mapping = DIRECTORY_MAPPING_IDMU;
	else {
		pgcfg->directory_based_mapping = DIRECTORY_MAPPING_NONE;
		idmapdlog(LOG_ERR,
		"config/directory_based_mapping:  invalid value \"%s\" ignored",
		    s);
		(*errors)++;
	}
	free(s);

	rc = get_val_int(handles, "list_size_limit",
	    &pgcfg->list_size_limit, SCF_TYPE_COUNT);
	if (rc != 0)
		(*errors)++;

	rc = get_val_astring(handles, "domain_name",
	    &pgcfg->domain_name);
	if (rc != 0)
		(*errors)++;
	else {
		(void) ad_disc_set_DomainName(handles->ad_ctx,
		    pgcfg->domain_name);
		pgcfg->domain_name_auto_disc = B_FALSE;
	}

	rc = get_val_astring(handles, "default_domain",
	    &pgcfg->default_domain);
	if (rc != 0) {
		/*
		 * SCF failures fetching config/default_domain we treat
		 * as fatal as they may leave ID mapping rules that
		 * match unqualified winnames flapping in the wind.
		 */
		return (-2);
	}

	if (pgcfg->default_domain == NULL && pgcfg->domain_name != NULL) {
		pgcfg->default_domain = strdup(pgcfg->domain_name);
	}

	rc = get_val_astring(handles, "machine_sid", &pgcfg->machine_sid);
	if (rc != 0)
		(*errors)++;
	if (pgcfg->machine_sid == NULL) {
		/* If machine_sid not configured, generate one */
		if (generate_machine_sid(&pgcfg->machine_sid) < 0)
			return (-2);
		rc = set_val_astring(handles, "machine_sid",
		    pgcfg->machine_sid);
		if (rc != 0)
			(*errors)++;
	}

	rc = get_val_ds(handles, "domain_controller", 389,
	    &pgcfg->domain_controller);
	if (rc != 0)
		(*errors)++;
	else {
		(void) ad_disc_set_DomainController(handles->ad_ctx,
		    pgcfg->domain_controller);
		pgcfg->domain_controller_auto_disc = B_FALSE;
	}

	rc = get_val_astring(handles, "forest_name", &pgcfg->forest_name);
	if (rc != 0)
		(*errors)++;
	else {
		(void) ad_disc_set_ForestName(handles->ad_ctx,
		    pgcfg->forest_name);
		pgcfg->forest_name_auto_disc = B_FALSE;
	}

	rc = get_val_astring(handles, "site_name", &pgcfg->site_name);
	if (rc != 0)
		(*errors)++;
	else
		(void) ad_disc_set_SiteName(handles->ad_ctx, pgcfg->site_name);

	rc = get_val_ds(handles, "global_catalog", 3268,
	    &pgcfg->global_catalog);
	if (rc != 0)
		(*errors)++;
	else {
		(void) ad_disc_set_GlobalCatalog(handles->ad_ctx,
		    pgcfg->global_catalog);
		pgcfg->global_catalog_auto_disc = B_FALSE;
	}

	/* Unless we're doing directory-based name mapping, we're done. */
	if (pgcfg->directory_based_mapping != DIRECTORY_MAPPING_NAME)
		return (0);

	rc = get_val_astring(handles, "ad_unixuser_attr",
	    &pgcfg->ad_unixuser_attr);
	if (rc != 0)
		return (-2);
	if (pgcfg->ad_unixuser_attr != NULL &&
	    !valid_ldap_attr(pgcfg->ad_unixuser_attr)) {
		idmapdlog(LOG_ERR, "config/ad_unixuser_attr=%s is not a "
		    "valid LDAP attribute name", pgcfg->ad_unixuser_attr);
		return (-3);
	}

	rc = get_val_astring(handles, "ad_unixgroup_attr",
	    &pgcfg->ad_unixgroup_attr);
	if (rc != 0)
		return (-2);
	if (pgcfg->ad_unixgroup_attr != NULL &&
	    !valid_ldap_attr(pgcfg->ad_unixgroup_attr)) {
		idmapdlog(LOG_ERR, "config/ad_unixgroup_attr=%s is not a "
		    "valid LDAP attribute name", pgcfg->ad_unixgroup_attr);
		return (-3);
	}

	rc = get_val_astring(handles, "nldap_winname_attr",
	    &pgcfg->nldap_winname_attr);
	if (rc != 0)
		return (-2);
	if (pgcfg->nldap_winname_attr != NULL &&
	    !valid_ldap_attr(pgcfg->nldap_winname_attr)) {
		idmapdlog(LOG_ERR, "config/nldap_winname_attr=%s is not a "
		    "valid LDAP attribute name", pgcfg->nldap_winname_attr);
		return (-3);
	}
	if (pgcfg->ad_unixuser_attr == NULL &&
	    pgcfg->ad_unixgroup_attr == NULL &&
	    pgcfg->nldap_winname_attr == NULL) {
		idmapdlog(LOG_ERR,
		    "If config/directory_based_mapping property is set to "
		    "\"name\" then at least one of the following name mapping "
		    "attributes must be specified. (config/ad_unixuser_attr OR "
		    "config/ad_unixgroup_attr OR config/nldap_winname_attr)");
		return (-3);
	}

	return (rc);

}


/*
 * This is the half of idmap_cfg_load() that auto-discovers values of
 * discoverable properties that weren't already set via SMF properties.
 *
 * idmap_cfg_discover() is called *after* idmap_cfg_load_smf(), so it
 * needs to be careful not to overwrite any properties set in SMF.
 */
static
void
idmap_cfg_discover(idmap_cfg_handles_t *handles, idmap_pg_config_t *pgcfg)
{
	ad_disc_t ad_ctx = handles->ad_ctx;
	ad_disc_t trusted_ctx;
	int i, j, k, l;
	char *forestname;
	int num_trusteddomains;
	boolean_t new_forest;
	char *trusteddomain;
	idmap_ad_disc_ds_t *globalcatalog;
	idmap_trustedforest_t *trustedforests;
	ad_disc_domainsinforest_t *domainsinforest;

	idmapdlog(LOG_DEBUG, "Running discovery.");

	ad_disc_refresh(ad_ctx);

	if (pgcfg->default_domain == NULL)
		pgcfg->default_domain = ad_disc_get_DomainName(ad_ctx,
		    NULL);

	if (pgcfg->domain_name == NULL)
		pgcfg->domain_name = ad_disc_get_DomainName(ad_ctx,
		    &pgcfg->domain_name_auto_disc);

	if (pgcfg->domain_controller == NULL)
		pgcfg->domain_controller =
		    ad_disc_get_DomainController(ad_ctx, AD_DISC_PREFER_SITE,
		    &pgcfg->domain_controller_auto_disc);

	if (pgcfg->forest_name == NULL)
		pgcfg->forest_name = ad_disc_get_ForestName(ad_ctx,
		    &pgcfg->forest_name_auto_disc);

	if (pgcfg->site_name == NULL)
		pgcfg->site_name = ad_disc_get_SiteName(ad_ctx,
		    &pgcfg->site_name_auto_disc);

	if (pgcfg->global_catalog == NULL)
		pgcfg->global_catalog =
		    ad_disc_get_GlobalCatalog(ad_ctx, AD_DISC_PREFER_SITE,
		    &pgcfg->global_catalog_auto_disc);

	pgcfg->domains_in_forest =
	    ad_disc_get_DomainsInForest(ad_ctx, NULL);

	pgcfg->trusted_domains =
	    ad_disc_get_TrustedDomains(ad_ctx, NULL);

	if (pgcfg->forest_name != NULL && pgcfg->trusted_domains != NULL &&
	    pgcfg->trusted_domains[0].domain[0] != '\0') {
		/*
		 * We have trusted domains.  We need to go through every
		 * one and find its forest. If it is a new forest we then need
		 * to find its Global Catalog and the domains in the forest
		 */
		for (i = 0; pgcfg->trusted_domains[i].domain[0] != '\0'; i++)
			continue;
		num_trusteddomains = i;

		trustedforests = calloc(num_trusteddomains,
		    sizeof (idmap_trustedforest_t));
		j = 0;
		for (i = 0; pgcfg->trusted_domains[i].domain[0] != '\0'; i++) {
			trusteddomain = pgcfg->trusted_domains[i].domain;
			trusted_ctx = ad_disc_init();
			ad_disc_set_DomainName(trusted_ctx,
			    trusteddomain);
			forestname =
			    ad_disc_get_ForestName(trusted_ctx, NULL);
			if (forestname == NULL) {
				idmapdlog(LOG_DEBUG, "unable to discover "
				    "Forest Name for the trusted domain %s",
				    trusteddomain);
				ad_disc_fini(trusted_ctx);
				continue;
			}

			if (strcasecmp(forestname, pgcfg->forest_name) == 0) {
				/*
				 * Ignore the domain as it is part of
				 * the primary forest
				 */
				free(forestname);
				ad_disc_fini(trusted_ctx);
				continue;
			}

			/* Is this a new forest? */
			new_forest = B_TRUE;
			for (k = 0; k < j; k++) {
				if (strcasecmp(forestname,
				    trustedforests[k].forest_name) == 0) {
					new_forest = B_FALSE;
					domainsinforest =
					    trustedforests[k].domains_in_forest;
					break;
				}
			}
			if (!new_forest) {
				/* Mark the domain as trusted */
				for (l = 0;
				    domainsinforest[l].domain[0] != '\0'; l++) {
					if (domain_eq(trusteddomain,
					    domainsinforest[l].domain)) {
						domainsinforest[l].trusted =
						    TRUE;
						break;
					}
				}
				free(forestname);
				ad_disc_fini(trusted_ctx);
				continue;
			}

			/*
			 * Get the Global Catalog and the domains in
			 * this new forest.
			 */
			globalcatalog =
			    ad_disc_get_GlobalCatalog(trusted_ctx,
			    AD_DISC_PREFER_SITE, NULL);
			if (globalcatalog == NULL) {
				idmapdlog(LOG_DEBUG,
				    "unable to discover Global "
				    "Catalog for the trusted domain %s",
				    trusteddomain);
				free(forestname);
				ad_disc_fini(trusted_ctx);
				continue;
			}
			domainsinforest =
			    ad_disc_get_DomainsInForest(trusted_ctx,
			    NULL);
			if (domainsinforest == NULL) {
				idmapdlog(LOG_DEBUG,
				    "unable to discover Domains in the Forest "
				    "for the trusted domain %s",
				    trusteddomain);
				free(globalcatalog);
				free(forestname);
				ad_disc_fini(trusted_ctx);
				continue;
			}

			trustedforests[j].forest_name = forestname;
			trustedforests[j].global_catalog = globalcatalog;
			trustedforests[j].domains_in_forest = domainsinforest;
			j++;
			/* Mark the domain as trusted */
			for (l = 0; domainsinforest[l].domain[0] != '\0';
			    l++) {
				if (domain_eq(trusteddomain,
				    domainsinforest[l].domain)) {
					domainsinforest[l].trusted = TRUE;
					break;
				}
			}
			ad_disc_fini(trusted_ctx);
		}
		if (j > 0) {
			pgcfg->num_trusted_forests = j;
			pgcfg->trusted_forests = trustedforests;
		} else {
			free(trustedforests);
		}
	}

	if (pgcfg->domain_name == NULL)
		idmapdlog(LOG_DEBUG, "unable to discover Domain Name");
	if (pgcfg->domain_controller == NULL)
		idmapdlog(LOG_DEBUG, "unable to discover Domain Controller");
	if (pgcfg->forest_name == NULL)
		idmapdlog(LOG_DEBUG, "unable to discover Forest Name");
	if (pgcfg->site_name == NULL)
		idmapdlog(LOG_DEBUG, "unable to discover Site Name");
	if (pgcfg->global_catalog == NULL)
		idmapdlog(LOG_DEBUG, "unable to discover Global Catalog");
	if (pgcfg->domains_in_forest == NULL)
		idmapdlog(LOG_DEBUG,
		    "unable to discover Domains in the Forest");
	if (pgcfg->trusted_domains == NULL)
		idmapdlog(LOG_DEBUG, "unable to discover Trusted Domains");

	ad_disc_done(ad_ctx);
	idmapdlog(LOG_DEBUG, "Discovery done.");
}


/*
 * idmap_cfg_load() is called at startup, and periodically via the
 * update thread when the auto-discovery TTLs expire, as well as part of
 * the refresh method, to update the current configuration.  It always
 * reads from SMF, but you still have to refresh the service after
 * changing the config pg in order for the changes to take effect.
 *
 * There are two flags:
 *
 *  - CFG_DISCOVER
 *  - CFG_LOG
 *
 * If CFG_DISCOVER is set then idmap_cfg_load() calls
 * idmap_cfg_discover() to discover, via DNS and LDAP lookups, property
 * values that weren't set in SMF.
 *
 * If CFG_LOG is set then idmap_cfg_load() will log (to LOG_NOTICE)
 * whether the configuration changed.  This should be used only from the
 * refresh method.
 *
 * Return values: 0 -> success, -1 -> failure, -2 -> hard failures
 * reading from SMF.
 */
int
idmap_cfg_load(idmap_cfg_t *cfg, int flags)
{
	int rc = 0;
	int errors;
	int changed = 0;
	int ad_reload_required = 0;
	idmap_pg_config_t new_pgcfg, *live_pgcfg;

	live_pgcfg = &cfg->pgcfg;
	(void) memset(&new_pgcfg, 0, sizeof (new_pgcfg));

	pthread_mutex_lock(&cfg->handles.mutex);

	if ((rc = idmap_cfg_load_smf(&cfg->handles, &new_pgcfg, &errors)) < -1)
		goto err;

	if (flags & CFG_DISCOVER)
		idmap_cfg_discover(&cfg->handles, &new_pgcfg);

	WRLOCK_CONFIG();
	if (live_pgcfg->list_size_limit != new_pgcfg.list_size_limit) {
		idmapdlog(LOG_INFO, "change list_size=%d",
		    new_pgcfg.list_size_limit);
		live_pgcfg->list_size_limit = new_pgcfg.list_size_limit;
	}

	/* Non-discoverable props updated here */
	changed += update_string(&live_pgcfg->machine_sid,
	    &new_pgcfg.machine_sid, "machine_sid");

	changed += update_bool(&live_pgcfg->eph_map_unres_sids,
	    &new_pgcfg.eph_map_unres_sids, "unresolvable_sid_mapping");

	changed += update_enum(&live_pgcfg->directory_based_mapping,
	    &new_pgcfg.directory_based_mapping, "directory_based_mapping",
	    directory_mapping_map);

	changed += update_string(&live_pgcfg->ad_unixuser_attr,
	    &new_pgcfg.ad_unixuser_attr, "ad_unixuser_attr");

	changed += update_string(&live_pgcfg->ad_unixgroup_attr,
	    &new_pgcfg.ad_unixgroup_attr, "ad_unixgroup_attr");

	changed += update_string(&live_pgcfg->nldap_winname_attr,
	    &new_pgcfg.nldap_winname_attr, "nldap_winname_attr");

	/* Props that can be discovered and set in SMF updated here */
	changed += update_string(&live_pgcfg->default_domain,
	    &new_pgcfg.default_domain, "default_domain");

	changed += update_string(&live_pgcfg->domain_name,
	    &new_pgcfg.domain_name, "domain_name");
	live_pgcfg->domain_name_auto_disc = new_pgcfg.domain_name_auto_disc;

	changed += update_dirs(&live_pgcfg->domain_controller,
	    &new_pgcfg.domain_controller, "domain_controller");
	live_pgcfg->domain_controller_auto_disc =
	    new_pgcfg.domain_controller_auto_disc;

	changed += update_string(&live_pgcfg->forest_name,
	    &new_pgcfg.forest_name, "forest_name");
	live_pgcfg->forest_name_auto_disc = new_pgcfg.forest_name_auto_disc;

	changed += update_string(&live_pgcfg->site_name,
	    &new_pgcfg.site_name, "site_name");
	live_pgcfg->site_name_auto_disc = new_pgcfg.site_name_auto_disc;

	if (update_dirs(&live_pgcfg->global_catalog,
	    &new_pgcfg.global_catalog, "global_catalog")) {
		changed++;
		if (live_pgcfg->global_catalog != NULL &&
		    live_pgcfg->global_catalog[0].host[0] != '\0')
			ad_reload_required = TRUE;
	}
	live_pgcfg->global_catalog_auto_disc =
	    new_pgcfg.global_catalog_auto_disc;

	if (update_domains_in_forest(&live_pgcfg->domains_in_forest,
	    &new_pgcfg.domains_in_forest, "domains_in_forest")) {
		changed++;
		ad_reload_required = TRUE;
	}

	if (update_trusted_domains(&live_pgcfg->trusted_domains,
	    &new_pgcfg.trusted_domains, "trusted_domains")) {
		changed++;
		if (live_pgcfg->trusted_domains != NULL &&
		    live_pgcfg->trusted_domains[0].domain[0] != '\0')
			ad_reload_required = TRUE;
	}

	if (update_trusted_forest(&live_pgcfg->trusted_forests,
	    &live_pgcfg->num_trusted_forests, &new_pgcfg.trusted_forests,
	    &new_pgcfg.num_trusted_forests, "trusted_forest")) {
		changed++;
		if (live_pgcfg->trusted_forests != NULL)
			ad_reload_required = TRUE;
	}

	if (ad_reload_required)
		reload_ad();

	idmap_cfg_unload(&new_pgcfg);

	if (flags & CFG_LOG) {
		/*
		 * If the config changes as a result of a refresh of the
		 * service, then logging about it can provide useful
		 * feedback to the sysadmin.
		 */
		idmapdlog(LOG_NOTICE, "Configuration %schanged",
		    changed ? "" : "un");
	}

	UNLOCK_CONFIG();

err:
	pthread_mutex_unlock(&cfg->handles.mutex);

	if (rc < -1)
		return (rc);

	return ((errors == 0) ? 0 : -1);
}

/*
 * Initialize 'cfg'.
 */
idmap_cfg_t *
idmap_cfg_init()
{
	idmap_cfg_handles_t *handles;

	/* First the smf repository handles: */
	idmap_cfg_t *cfg = calloc(1, sizeof (idmap_cfg_t));
	if (!cfg) {
		idmapdlog(LOG_ERR, "Out of memory");
		return (NULL);
	}
	handles = &cfg->handles;

	(void) pthread_mutex_init(&handles->mutex, NULL);

	if (!(handles->main = scf_handle_create(SCF_VERSION))) {
		idmapdlog(LOG_ERR, "scf_handle_create() failed: %s",
		    scf_strerror(scf_error()));
		goto error;
	}

	if (scf_handle_bind(handles->main) < 0) {
		idmapdlog(LOG_ERR, "scf_handle_bind() failed: %s",
		    scf_strerror(scf_error()));
		goto error;
	}

	if (!(handles->service = scf_service_create(handles->main)) ||
	    !(handles->instance = scf_instance_create(handles->main)) ||
	    !(handles->config_pg = scf_pg_create(handles->main)) ||
	    !(handles->general_pg = scf_pg_create(handles->main))) {
		idmapdlog(LOG_ERR, "scf handle creation failed: %s",
		    scf_strerror(scf_error()));
		goto error;
	}

	if (scf_handle_decode_fmri(handles->main,
	    FMRI_BASE "/:properties/" CONFIG_PG,
	    NULL,				/* scope */
	    handles->service,		/* service */
	    handles->instance,		/* instance */
	    handles->config_pg,		/* pg */
	    NULL,				/* prop */
	    SCF_DECODE_FMRI_EXACT) < 0) {
		idmapdlog(LOG_ERR, "scf_handle_decode_fmri() failed: %s",
		    scf_strerror(scf_error()));
		goto error;
	}

	if (scf_service_get_pg(handles->service,
	    GENERAL_PG, handles->general_pg) < 0) {
		idmapdlog(LOG_ERR, "scf_service_get_pg() failed: %s",
		    scf_strerror(scf_error()));
		goto error;
	}

	if (check_smf_debug_mode(handles) != 0)
		goto error;

	/* Initialize AD Auto Discovery context */
	handles->ad_ctx = ad_disc_init();
	if (handles->ad_ctx == NULL)
		goto error;

	return (cfg);

error:
	(void) idmap_cfg_fini(cfg);
	return (NULL);
}

void
idmap_cfg_unload(idmap_pg_config_t *pgcfg)
{

	if (pgcfg->default_domain) {
		free(pgcfg->default_domain);
		pgcfg->default_domain = NULL;
	}
	if (pgcfg->domain_name) {
		free(pgcfg->domain_name);
		pgcfg->domain_name = NULL;
	}
	if (pgcfg->machine_sid) {
		free(pgcfg->machine_sid);
		pgcfg->machine_sid = NULL;
	}
	if (pgcfg->domain_controller) {
		free(pgcfg->domain_controller);
		pgcfg->domain_controller = NULL;
	}
	if (pgcfg->forest_name) {
		free(pgcfg->forest_name);
		pgcfg->forest_name = NULL;
	}
	if (pgcfg->site_name) {
		free(pgcfg->site_name);
		pgcfg->site_name = NULL;
	}
	if (pgcfg->global_catalog) {
		free(pgcfg->global_catalog);
		pgcfg->global_catalog = NULL;
	}
	if (pgcfg->trusted_domains) {
		free(pgcfg->trusted_domains);
		pgcfg->trusted_domains = NULL;
	}
	if (pgcfg->trusted_forests)
		free_trusted_forests(&pgcfg->trusted_forests,
		    &pgcfg->num_trusted_forests);

	if (pgcfg->ad_unixuser_attr) {
		free(pgcfg->ad_unixuser_attr);
		pgcfg->ad_unixuser_attr = NULL;
	}
	if (pgcfg->ad_unixgroup_attr) {
		free(pgcfg->ad_unixgroup_attr);
		pgcfg->ad_unixgroup_attr = NULL;
	}
	if (pgcfg->nldap_winname_attr) {
		free(pgcfg->nldap_winname_attr);
		pgcfg->nldap_winname_attr = NULL;
	}
}

int
idmap_cfg_fini(idmap_cfg_t *cfg)
{
	idmap_cfg_handles_t *handles = &cfg->handles;
	idmap_cfg_unload(&cfg->pgcfg);

	(void) pthread_mutex_destroy(&handles->mutex);
	scf_pg_destroy(handles->config_pg);
	scf_pg_destroy(handles->general_pg);
	scf_instance_destroy(handles->instance);
	scf_service_destroy(handles->service);
	scf_handle_destroy(handles->main);
	if (handles->ad_ctx != NULL)
		ad_disc_fini(handles->ad_ctx);
	free(cfg);

	return (0);
}

void
idmap_cfg_poke_updates(void)
{
	if (idmapd_ev_port != -1)
		(void) port_send(idmapd_ev_port, POKE_AUTO_DISCOVERY, NULL);
}

/*ARGSUSED*/
void
idmap_cfg_hup_handler(int sig)
{
	if (idmapd_ev_port >= 0)
		(void) port_send(idmapd_ev_port, RECONFIGURE, NULL);
}

/*
 * Upgrade the DS mapping flags.
 *
 * If the old ds_name_mapping_enabled flag is present, then
 *     if the new directory_based_mapping value is present, then
 *         if the two are compatible, delete the old and note it
 *         else delete the old and warn
 *     else
 *         set the new based on the old, and note it
 *         delete the old
 */
static
int
upgrade_directory_mapping(idmap_cfg_handles_t *handles)
{
	boolean_t legacy_ds_name_mapping_present;
	const char DS_NAME_MAPPING_ENABLED[] = "ds_name_mapping_enabled";
	const char DIRECTORY_BASED_MAPPING[] = "directory_based_mapping";
	int rc;

	rc = prop_exists(handles, DS_NAME_MAPPING_ENABLED,
	    &legacy_ds_name_mapping_present);

	if (rc != 0)
		return (rc);

	if (!legacy_ds_name_mapping_present)
		return (0);

	boolean_t legacy_ds_name_mapping_enabled;
	rc = get_val_int(handles, DS_NAME_MAPPING_ENABLED,
	    &legacy_ds_name_mapping_enabled, SCF_TYPE_BOOLEAN);
	if (rc != 0)
		return (rc);

	char *legacy_mode;
	char *legacy_bool_string;
	if (legacy_ds_name_mapping_enabled) {
		legacy_mode = "name";
		legacy_bool_string = "true";
	} else {
		legacy_mode = "none";
		legacy_bool_string = "false";
	}

	char *directory_based_mapping;
	rc = get_val_astring(handles, DIRECTORY_BASED_MAPPING,
	    &directory_based_mapping);
	if (rc != 0)
		return (rc);

	if (directory_based_mapping == NULL) {
		idmapdlog(LOG_INFO,
		    "Upgrading old %s=%s setting\n"
		    "to %s=%s.",
		    DS_NAME_MAPPING_ENABLED, legacy_bool_string,
		    DIRECTORY_BASED_MAPPING, legacy_mode);
		rc = set_val_astring(handles, DIRECTORY_BASED_MAPPING,
		    legacy_mode);
		if (rc != 0)
			return (rc);
	} else {
		boolean_t new_name_mapping;
		if (strcasecmp(directory_based_mapping, "name") == 0)
			new_name_mapping = B_TRUE;
		else
			new_name_mapping = B_FALSE;

		if (legacy_ds_name_mapping_enabled == new_name_mapping) {
			idmapdlog(LOG_INFO,
			    "Automatically removing old %s=%s setting\n"
			    "in favor of %s=%s.",
			    DS_NAME_MAPPING_ENABLED, legacy_bool_string,
			    DIRECTORY_BASED_MAPPING, directory_based_mapping);
		} else {
			idmapdlog(LOG_WARNING,
			    "Removing conflicting %s=%s setting\n"
			    "in favor of %s=%s.",
			    DS_NAME_MAPPING_ENABLED, legacy_bool_string,
			    DIRECTORY_BASED_MAPPING, directory_based_mapping);
		}
		free(directory_based_mapping);
	}

	rc = del_val(handles, DS_NAME_MAPPING_ENABLED);
	if (rc != 0)
		return (rc);

	return (0);
}

/*
 * Do whatever is necessary to upgrade idmap's configuration before
 * we load it.
 */
int
idmap_cfg_upgrade(idmap_cfg_t *cfg)
{
	int rc;

	rc = upgrade_directory_mapping(&cfg->handles);
	if (rc != 0)
		return (rc);

	return (0);
}