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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 <errno.h>
#include <time.h>
#include <sys/time.h>
#include "util/util.h"
#include "db/sysdb.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_async.h"
#include "providers/ldap/sdap_idmap.h"
#include "providers/ldap/sdap_async_enum.h"
extern struct tevent_req *ldap_id_cleanup_send(TALLOC_CTX *memctx,
struct tevent_context *ev,
struct sdap_id_ctx *ctx);
/* ==Enumeration-Task===================================================== */
static void ldap_id_enumerate_reschedule(struct tevent_req *req);
static void ldap_id_enumerate_timeout(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval tv, void *pvt);
static void ldap_id_enumerate_timer(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt)
{
struct sdap_id_ctx *ctx = talloc_get_type(pvt, struct sdap_id_ctx);
struct tevent_timer *timeout;
struct tevent_req *req;
int delay;
errno_t ret;
if (be_is_offline(ctx->be)) {
DEBUG(4, ("Backend is marked offline, retry later!\n"));
/* schedule starting from now, not the last run */
delay = dp_opt_get_int(ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
tv = tevent_timeval_current_ofs(delay, 0);
ldap_id_enumerate_set_timer(ctx, tv);
return;
}
req = sdap_dom_enum_send(ctx, ev, ctx, ctx->opts->sdom, ctx->conn);
if (!req) {
DEBUG(1, ("Failed to schedule enumeration, retrying later!\n"));
/* schedule starting from now, not the last run */
delay = dp_opt_get_int(ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
tv = tevent_timeval_current_ofs(delay, 0);
ret = ldap_id_enumerate_set_timer(ctx, tv);
if (ret != EOK) {
DEBUG(1, ("Error setting up enumerate timer\n"));
}
return;
}
tevent_req_set_callback(req, ldap_id_enumerate_reschedule, ctx);
/* if enumeration takes so long, either we try to enumerate too
* frequently, or something went seriously wrong */
delay = dp_opt_get_int(ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
tv = tevent_timeval_current_ofs(delay, 0);
timeout = tevent_add_timer(ctx->be->ev, req, tv,
ldap_id_enumerate_timeout, req);
if (timeout == NULL) {
/* If we can't guarantee a timeout, we
* need to cancel the request, to avoid
* the possibility of starting another
* concurrently
*/
talloc_zfree(req);
DEBUG(1, ("Failed to schedule enumeration, retrying later!\n"));
/* schedule starting from now, not the last run */
delay = dp_opt_get_int(ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
tv = tevent_timeval_current_ofs(delay, 0);
ret = ldap_id_enumerate_set_timer(ctx, tv);
if (ret != EOK) {
DEBUG(1, ("Error setting up enumerate timer\n"));
}
return;
}
return;
}
static void ldap_id_enumerate_timeout(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval tv, void *pvt)
{
struct tevent_req *req = talloc_get_type(pvt, struct tevent_req);
struct sdap_id_ctx *ctx = tevent_req_callback_data(req,
struct sdap_id_ctx);
int delay;
delay = dp_opt_get_int(ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
DEBUG(1, ("Enumeration timed out! Timeout too small? (%ds)!\n", delay));
tv = tevent_timeval_current_ofs(delay, 0);
ldap_id_enumerate_set_timer(ctx, tv);
talloc_zfree(req);
}
static void ldap_id_enumerate_reschedule(struct tevent_req *req)
{
struct sdap_id_ctx *ctx = tevent_req_callback_data(req,
struct sdap_id_ctx);
struct timeval tv;
int delay;
errno_t ret;
ret = sdap_dom_enum_recv(req);
talloc_zfree(req);
if (ret != EOK) {
/* On error schedule starting from now, not the last run */
tv = tevent_timeval_current();
} else {
tv = ctx->opts->sdom->last_enum;
}
delay = dp_opt_get_int(ctx->opts->basic, SDAP_ENUM_REFRESH_TIMEOUT);
tv = tevent_timeval_add(&tv, delay, 0);
ldap_id_enumerate_set_timer(ctx, tv);
}
int ldap_id_enumerate_set_timer(struct sdap_id_ctx *ctx, struct timeval tv)
{
struct tevent_timer *enum_task;
DEBUG(6, ("Scheduling next enumeration at %ld.%ld\n",
(long)tv.tv_sec, (long)tv.tv_usec));
enum_task = tevent_add_timer(ctx->be->ev, ctx,
tv, ldap_id_enumerate_timer, ctx);
if (!enum_task) {
DEBUG(0, ("FATAL: failed to setup enumeration task!\n"));
return EFAULT;
}
return EOK;
}
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