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/*
Authors:
Pavel Březina <pbrezina@redhat.com>
Copyright (C) 2011 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 <tevent.h>
#include <talloc.h>
#include "util/util.h"
#include "providers/ldap/sdap.h"
#include "providers/ldap/sdap_id_op.h"
#include "providers/ldap/sdap_sudo.h"
struct sdap_sudo_timer_state {
struct tevent_context *ev;
struct sdap_sudo_ctx *sudo_ctx;
time_t timeout; /* relative time how many seconds wait before
canceling fn request */
sdap_sudo_timer_fn_t fn; /* request executed on 'when' */
struct tevent_req *subreq;
struct tevent_timer *timer_timeout;
};
static void sdap_sudo_timer(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt);
static void sdap_sudo_timer_done(struct tevent_req *subreq);
static void sdap_sudo_timer_timeout(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt);
struct tevent_req * sdap_sudo_timer_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct sdap_sudo_ctx *sudo_ctx,
struct timeval when,
time_t timeout,
sdap_sudo_timer_fn_t fn)
{
struct tevent_req *req = NULL;
struct tevent_timer *timer = NULL;
struct sdap_sudo_timer_state *state = NULL;
int ret;
/* create request */
req = tevent_req_create(mem_ctx, &state, struct sdap_sudo_timer_state);
if (req == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE, ("tevent_req_create() failed\n"));
return NULL;
}
state->ev = ev;
state->sudo_ctx = sudo_ctx;
state->timeout = timeout;
state->fn = fn;
/* set timer */
timer = tevent_add_timer(ev, req, when, sdap_sudo_timer, req);
if (timer == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE, ("tevent_add_timer() failed\n"));
ret = ENOMEM;
goto immediately;
}
return req;
immediately:
if (ret == EOK) {
tevent_req_done(req);
} else {
tevent_req_error(req, ret);
}
tevent_req_post(req, ev);
return req;
}
int sdap_sudo_timer_recv(TALLOC_CTX *mem_ctx,
struct tevent_req *req,
struct tevent_req **_subreq)
{
struct sdap_sudo_timer_state *state = NULL;
state = tevent_req_data(req, struct sdap_sudo_timer_state);
TEVENT_REQ_RETURN_ON_ERROR(req);
*_subreq = talloc_steal(mem_ctx, state->subreq);
return EOK;
}
static void sdap_sudo_timer(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt)
{
struct tevent_req *req = NULL;
struct sdap_sudo_timer_state *state = NULL;
req = talloc_get_type(pvt, struct tevent_req);
state = tevent_req_data(req, struct sdap_sudo_timer_state);
/* issue request */
state->subreq = state->fn(state, state->sudo_ctx);
if (state->subreq == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to issue timed request!\n"));
tevent_req_error(req, ENOMEM);
return;
}
tevent_req_set_callback(state->subreq, sdap_sudo_timer_done, req);
/* schedule timeout */
tv = tevent_timeval_current_ofs(state->timeout, 0);
state->timer_timeout = tevent_add_timer(state->ev, state->subreq, tv,
sdap_sudo_timer_timeout, req);
if (state->timer_timeout == NULL) {
/* If we can't guarantee a timeout, we
* need to cancel the request, to avoid
* the possibility of starting another
* concurrently
*/
DEBUG(SSSDBG_CRIT_FAILURE, ("Failed to set timeout, "
"canceling request!\n"));
talloc_zfree(state->subreq);
tevent_req_error(req, ENOMEM);
}
}
static void sdap_sudo_timer_done(struct tevent_req *subreq)
{
struct tevent_req *req = NULL;
struct sdap_sudo_timer_state *state = NULL;
req = tevent_req_callback_data(subreq, struct tevent_req);
/* do not free subreq, it is returned in recv */
/* cancel timeout */
state = tevent_req_data(req, struct sdap_sudo_timer_state);
talloc_zfree(state->timer_timeout);
tevent_req_done(req);
}
static void sdap_sudo_timer_timeout(struct tevent_context *ev,
struct tevent_timer *tt,
struct timeval tv, void *pvt)
{
struct tevent_req *req = NULL;
struct sdap_sudo_timer_state *state = NULL;
req = talloc_get_type(pvt, struct tevent_req);
state = tevent_req_data(req, struct sdap_sudo_timer_state);
DEBUG(SSSDBG_CRIT_FAILURE, ("Request timed out. Is timeout too small?"
" (%lds)!\n", state->timeout));
talloc_zfree(state->subreq);
tevent_req_error(req, EAGAIN);
}
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