ipa_hosts.c revision a3c8390d19593b1e5277d95bfb4ab206d4785150
/*
SSSD
Authors:
Jan Zeleny <jzeleny@redhat.com>
Copyright (C) 2012 Red Hat
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; either version 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
*/
#include "util/util.h"
#include "db/sysdb.h"
#include "providers/ldap/sdap_async.h"
#include "providers/ipa/ipa_hosts.h"
#include "providers/ipa/ipa_common.h"
struct ipa_host_state {
struct tevent_context *ev;
struct sysdb_ctx *sysdb;
struct sdap_handle *sh;
struct sdap_options *opts;
const char **attrs;
struct sdap_attr_map *host_map;
struct sdap_attr_map *hostgroup_map;
struct sdap_search_base **search_bases;
int search_base_iter;
char *cur_filter;
char *host_filter;
const char *hostname;
/* Return values */
size_t host_count;
struct sysdb_attrs **hosts;
size_t hostgroup_count;
struct sysdb_attrs **hostgroups;
struct sdap_attr_map_info *ipa_hostgroup_map;
};
static void
ipa_host_info_done(struct tevent_req *subreq);
static void
ipa_hostgroup_info_done(struct tevent_req *subreq);
static errno_t
ipa_host_info_next(struct tevent_req *req,
struct ipa_host_state *state);
static errno_t
ipa_hostgroup_info_next(struct tevent_req *req,
struct ipa_host_state *state);
/**
* hostname == NULL -> look up all hosts / host groups
* hostname != NULL -> look up only given host and groups
* it's member of
* hostgroup_map == NULL -> skip looking up hostgroups
*/
struct tevent_req *
ipa_host_info_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct sdap_handle *sh,
struct sdap_options *opts,
const char *hostname,
struct sdap_attr_map *host_map,
struct sdap_attr_map *hostgroup_map,
struct sdap_search_base **search_bases)
{
errno_t ret;
struct ipa_host_state *state;
struct tevent_req *req;
req = tevent_req_create(mem_ctx, &state, struct ipa_host_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->sh = sh;
state->opts = opts;
state->hostname = hostname;
state->search_bases = search_bases;
state->search_base_iter = 0;
state->cur_filter = NULL;
state->host_map = host_map;
state->hostgroup_map = hostgroup_map;
ret = build_attrs_from_map(state, host_map, IPA_OPTS_HOST,
NULL, &state->attrs, NULL);
if (ret != EOK) {
goto immediate;
}
if (hostname == NULL) {
state->host_filter = talloc_asprintf(state, "(objectClass=%s)",
host_map[IPA_OC_HOST].name);
} else {
state->host_filter = talloc_asprintf(state, "(&(objectClass=%s)(%s=%s))",
host_map[IPA_OC_HOST].name,
host_map[IPA_AT_HOST_FQDN].name,
hostname);
}
if (state->host_filter == NULL) {
ret = ENOMEM;
goto immediate;
}
ret = ipa_host_info_next(req, state);
if (ret == EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "No host search base configured?\n");
ret = EINVAL;
}
if (ret != EAGAIN) {
goto immediate;
}
return req;
immediate:
if (ret == EOK) {
tevent_req_done(req);
} else {
tevent_req_error(req, ret);
}
tevent_req_post(req, ev);
return req;
}
static errno_t ipa_host_info_next(struct tevent_req *req,
struct ipa_host_state *state)
{
struct sdap_search_base *base;
struct tevent_req *subreq;
base = state->search_bases[state->search_base_iter];
if (base == NULL) {
return EOK;
}
talloc_zfree(state->cur_filter);
state->cur_filter = sdap_get_id_specific_filter(state, state->host_filter,
base->filter);
if (state->cur_filter == NULL) {
return ENOMEM;
}
subreq = sdap_get_generic_send(state, state->ev, state->opts,
state->sh, base->basedn,
base->scope, state->cur_filter,
state->attrs, state->host_map,
IPA_OPTS_HOST,
dp_opt_get_int(state->opts->basic,
SDAP_ENUM_SEARCH_TIMEOUT),
true);
if (subreq == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Error requesting host info\n");
talloc_zfree(state->cur_filter);
return EIO;
}
tevent_req_set_callback(subreq, ipa_host_info_done, req);
return EAGAIN;
}
static void
ipa_host_info_done(struct tevent_req *subreq)
{
errno_t ret;
struct tevent_req *req =
tevent_req_callback_data(subreq, struct tevent_req);
struct ipa_host_state *state =
tevent_req_data(req, struct ipa_host_state);
const char *host_dn;
ret = sdap_get_generic_recv(subreq, state,
&state->host_count,
&state->hosts);
talloc_zfree(subreq);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
if (state->host_count == 0) {
state->search_base_iter++;
ret = ipa_host_info_next(req, state);
if (ret == EOK) {
/* No more search bases to try */
tevent_req_error(req, ENOENT);
} else if (ret != EAGAIN) {
tevent_req_error(req, ret);
}
return;
}
if (state->hostgroup_map) {
talloc_free(state->attrs);
ret = build_attrs_from_map(state, state->hostgroup_map,
IPA_OPTS_HOSTGROUP, NULL,
&state->attrs, NULL);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
/* Look up host groups */
if (state->hostname == NULL) {
talloc_zfree(state->host_filter);
state->host_filter = talloc_asprintf(state, "(objectClass=%s)",
state->hostgroup_map[IPA_OC_HOSTGROUP].name);
if (state->host_filter == NULL) {
tevent_req_error(req, ENOMEM);
return;
}
state->search_base_iter = 0;
ret = ipa_hostgroup_info_next(req, state);
if (ret == EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "No host search base configured?\n");
tevent_req_error(req, EINVAL);
return;
} else if (ret != EAGAIN) {
tevent_req_error(req, ret);
return;
}
} else {
state->ipa_hostgroup_map = talloc_zero(state, struct sdap_attr_map_info);
if (state->ipa_hostgroup_map == NULL) {
tevent_req_error(req, ENOMEM);
return;
}
state->ipa_hostgroup_map->map = state->hostgroup_map;
state->ipa_hostgroup_map->num_attrs = IPA_OPTS_HOSTGROUP;
ret = sysdb_attrs_get_string(state->hosts[0], SYSDB_ORIG_DN, &host_dn);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
if (!sdap_has_deref_support(state->sh, state->opts)) {
DEBUG(SSSDBG_CRIT_FAILURE, "Server does not support deref\n");
tevent_req_error(req, EIO);
return;
}
subreq = sdap_deref_search_send(state, state->ev, state->opts, state->sh,
host_dn,
state->hostgroup_map[IPA_AT_HOSTGROUP_MEMBER_OF].name,
state->attrs,
1, state->ipa_hostgroup_map,
dp_opt_get_int(state->opts->basic,
SDAP_ENUM_SEARCH_TIMEOUT));
if (subreq == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Error requesting host info\n");
tevent_req_error(req, EIO);
return;
}
tevent_req_set_callback(subreq, ipa_hostgroup_info_done, req);
}
} else {
/* Nothing else to do, just complete the req */
tevent_req_done(req);
}
}
static errno_t ipa_hostgroup_info_next(struct tevent_req *req,
struct ipa_host_state *state)
{
struct sdap_search_base *base;
struct tevent_req *subreq;
base = state->search_bases[state->search_base_iter];
if (base == NULL) {
return EOK;
}
talloc_zfree(state->cur_filter);
state->cur_filter = sdap_get_id_specific_filter(state, state->host_filter,
base->filter);
if (state->cur_filter == NULL) {
return ENOMEM;
}
subreq = sdap_get_generic_send(state, state->ev, state->opts, state->sh,
base->basedn, base->scope,
state->cur_filter, state->attrs,
state->hostgroup_map,
IPA_OPTS_HOSTGROUP,
dp_opt_get_int(state->opts->basic,
SDAP_ENUM_SEARCH_TIMEOUT),
true);
if (subreq == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Error requesting hostgroup info\n");
talloc_zfree(state->cur_filter);
return EIO;
}
tevent_req_set_callback(subreq, ipa_hostgroup_info_done, req);
return EAGAIN;
}
static void
ipa_hostgroup_info_done(struct tevent_req *subreq)
{
errno_t ret;
struct tevent_req *req =
tevent_req_callback_data(subreq, struct tevent_req);
struct ipa_host_state *state =
tevent_req_data(req, struct ipa_host_state);
size_t hostgroups_total;
size_t hostgroup_count;
struct sysdb_attrs **hostgroups;
struct sdap_deref_attrs **deref_result;
const char *hostgroup_name;
const char *hostgroup_dn;
int i, j;
if (state->hostname == NULL) {
ret = sdap_get_generic_recv(subreq, state,
&hostgroup_count,
&hostgroups);
talloc_zfree(subreq);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE,
"sdap_get_generic_recv failed: [%d]\n", ret);
tevent_req_error(req, ret);
return;
}
/* Merge the two arrays */
if (hostgroup_count > 0) {
hostgroups_total = hostgroup_count + state->hostgroup_count;
state->hostgroups = talloc_realloc(state, state->hostgroups,
struct sysdb_attrs *,
hostgroups_total);
if (state->hostgroups == NULL) {
tevent_req_error(req, ENOMEM);
return;
}
i = 0;
while(state->hostgroup_count < hostgroups_total) {
state->hostgroups[state->hostgroup_count] =
talloc_steal(state->hostgroups, hostgroups[i]);
state->hostgroup_count++;
i++;
}
}
/* Now look in the next base */
state->search_base_iter++;
ret = ipa_hostgroup_info_next(req, state);
if (ret != EOK && ret != EAGAIN) {
tevent_req_error(req, ret);
}
if (ret != EOK) {
/* Only continue if no error occurred
* and no req was created */
return;
}
} else {
ret = sdap_deref_search_recv(subreq, state,
&state->hostgroup_count,
&deref_result);
talloc_zfree(subreq);
if (ret != EOK) goto done;
if (state->hostgroup_count == 0) {
DEBUG(SSSDBG_FUNC_DATA, "No host groups were dereferenced\n");
} else {
state->hostgroups = talloc_zero_array(state, struct sysdb_attrs *,
state->hostgroup_count);
if (state->hostgroups == NULL) {
ret = ENOMEM;
goto done;
}
j = 0;
for (i = 0; i < state->hostgroup_count; i++) {
ret = sysdb_attrs_get_string(deref_result[i]->attrs,
SYSDB_ORIG_DN, &hostgroup_dn);
if (ret != EOK) goto done;
if (!sss_ldap_dn_in_search_bases(state, hostgroup_dn,
state->search_bases,
NULL)) {
continue;
}
ret = sysdb_attrs_get_string(deref_result[i]->attrs,
state->hostgroup_map[IPA_AT_HOSTGROUP_NAME].sys_name,
&hostgroup_name);
if (ret != EOK) goto done;
DEBUG(SSSDBG_FUNC_DATA, "Dereferenced host group: %s\n",
hostgroup_name);
state->hostgroups[j] = talloc_steal(state->hostgroups,
deref_result[i]->attrs);
j++;
}
state->hostgroup_count = j;
}
}
done:
if (ret == EOK) {
tevent_req_done(req);
} else {
DEBUG(SSSDBG_OP_FAILURE, "Error [%d][%s]\n", ret, strerror(ret));
tevent_req_error(req, ret);
}
}
errno_t ipa_host_info_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
size_t *host_count,
struct sysdb_attrs ***hosts,
size_t *hostgroup_count,
struct sysdb_attrs ***hostgroups)
{
size_t c;
struct ipa_host_state *state =
tevent_req_data(req, struct ipa_host_state);
TEVENT_REQ_RETURN_ON_ERROR(req);
*host_count = state->host_count;
*hosts = talloc_steal(mem_ctx, state->hosts);
for (c = 0; c < state->host_count; c++) {
/* Guarantee the memory heirarchy of the list */
talloc_steal(state->hosts, state->hosts[c]);
}
if (hostgroup_count) *hostgroup_count = state->hostgroup_count;
if (hostgroups) *hostgroups = talloc_steal(mem_ctx, state->hostgroups);
return EOK;
}