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/*
SSSD
LDAP Identity Enumeration
Authors:
Simo Sorce <ssorce@redhat.com>
Copyright (C) 2009 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/ldap_common.h"
#include "providers/ldap/sdap_async_enum.h"
errno_t ldap_id_setup_enumeration(struct be_ctx *be_ctx,
struct sdap_id_ctx *id_ctx,
struct sdap_domain *sdom,
be_ptask_send_t send_fn,
be_ptask_recv_t recv_fn,
void *pvt)
{
errno_t ret;
time_t first_delay;
time_t period;
time_t offset;
time_t cleanup;
bool has_enumerated;
struct ldap_enum_ctx *ectx = NULL;
char *name = NULL;
ret = sysdb_has_enumerated(sdom->dom, SYSDB_HAS_ENUMERATED_ID,
&has_enumerated);
if (ret == ENOENT) {
/* default value */
has_enumerated = false;
} else if (ret != EOK) {
return ret;
}
if (has_enumerated) {
/* At least one enumeration has previously run,
* so clients will get cached data. We will delay
* starting to enumerate by 10s so we don't slow
* down the startup process if this is happening
* during system boot.
*/
first_delay = 10;
} else {
/* This is our first startup. Schedule the
* enumeration to start immediately once we
* enter the mainloop.
*/
first_delay = 0;
}
cleanup = dp_opt_get_int(id_ctx->opts->basic, SDAP_PURGE_CACHE_TIMEOUT);
if (cleanup == 0) {
/* We need to cleanup the cache once in a while when enumerating, otherwise
* enumeration would only download deltas since the previous lastUSN and would
* not detect removed entries
*/
ret = dp_opt_set_int(id_ctx->opts->basic, SDAP_PURGE_CACHE_TIMEOUT,
LDAP_ENUM_PURGE_TIMEOUT);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Cannot set cleanup timeout, enumeration wouldn't "
"detect removed entries!\n");
return ret;
}
}
period = dp_opt_get_int(id_ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
offset = dp_opt_get_int(id_ctx->opts->basic, SDAP_ENUM_REFRESH_OFFSET);
ectx = talloc(sdom, struct ldap_enum_ctx);
if (ectx == NULL) {
return ENOMEM;
}
ectx->sdom = sdom;
ectx->pvt = pvt;
name = talloc_asprintf(NULL, "Enumeration [id] of %s",
sdom->dom->name);
if (name == NULL) {
ret = ENOMEM;
goto done;
}
ret = be_ptask_create(id_ctx, be_ctx,
period, /* period */
first_delay, /* first_delay */
5, /* enabled delay */
offset, /* random offset */
period, /* timeout */
0, /* max_backoff */
send_fn, recv_fn,
ectx, name,
BE_PTASK_OFFLINE_SKIP | BE_PTASK_SCHEDULE_FROM_LAST,
&id_ctx->task);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Unable to initialize enumeration periodic task\n");
goto done;
}
ret = EOK;
done:
talloc_free(name);
if (ret != EOK) {
talloc_free(ectx);
}
return ret;
}
struct ldap_enumeration_state {
struct ldap_enum_ctx *ectx;
struct sdap_id_ctx *id_ctx;
struct sss_domain_info *dom;
};
static void ldap_enumeration_done(struct tevent_req *subreq);
struct tevent_req *
ldap_id_enumeration_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct be_ctx *be_ctx,
struct be_ptask *be_ptask,
void *pvt)
{
struct ldap_enumeration_state *state;
struct tevent_req *req;
struct tevent_req *subreq;
struct ldap_enum_ctx *ectx;
errno_t ret;
req = tevent_req_create(mem_ctx, &state,
struct ldap_enumeration_state);
if (req == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "tevent_req_create() failed\n");
return NULL;
}
ectx = talloc_get_type(pvt, struct ldap_enum_ctx);
if (ectx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Cannot retrieve ldap_enum_ctx!\n");
ret = EFAULT;
goto fail;
}
state->ectx = ectx;
state->dom = ectx->sdom->dom;
state->id_ctx = talloc_get_type_abort(ectx->pvt, struct sdap_id_ctx);
subreq = sdap_dom_enum_send(state, ev, state->id_ctx, ectx->sdom,
state->id_ctx->conn);
if (subreq == NULL) {
/* The ptask API will reschedule the enumeration on its own on
* failure */
DEBUG(SSSDBG_OP_FAILURE,
"Failed to schedule enumeration, retrying later!\n");
ret = EIO;
goto fail;
}
tevent_req_set_callback(subreq, ldap_enumeration_done, req);
return req;
fail:
tevent_req_error(req, ret);
tevent_req_post(req, ev);
return req;
}
static void
ldap_enumeration_done(struct tevent_req *subreq)
{
errno_t ret;
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
ret = sdap_dom_enum_recv(subreq);
talloc_zfree(subreq);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
tevent_req_done(req);
}
errno_t
ldap_id_enumeration_recv(struct tevent_req *req)
{
TEVENT_REQ_RETURN_ON_ERROR(req);
return EOK;
}
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