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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 <string.h>
#include <tevent.h>
#include "providers/dp_backend.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap.h"
#include "providers/ldap/sdap_async.h"
#include "providers/ldap/sdap_sudo.h"
#include "providers/ldap/sdap_sudo_cache.h"
#include "providers/ldap/sdap_sudo_timer.h"
#include "db/sysdb_sudo.h"
static void
sdap_sudo_shutdown(struct be_req *req)
{
sdap_handler_done(req, DP_ERR_OK, EOK, NULL);
}
struct bet_ops sdap_sudo_ops = {
.handler = sdap_sudo_handler,
.finalize = sdap_sudo_shutdown
};
int sdap_sudo_setup_tasks(struct sdap_id_ctx *id_ctx);
int sdap_sudo_init(struct be_ctx *be_ctx,
struct sdap_id_ctx *id_ctx,
struct bet_ops **ops,
void **pvt_data)
{
int ret;
DEBUG(SSSDBG_TRACE_INTERNAL, ("Initializing sudo LDAP back end\n"));
*ops = &sdap_sudo_ops;
*pvt_data = id_ctx;
ret = ldap_get_sudo_options(id_ctx, be_ctx->cdb,
be_ctx->conf_path, id_ctx->opts);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("Cannot get SUDO options [%d]: %s\n",
ret, strerror(ret)));
return ret;
}
ret = sdap_sudo_setup_tasks(id_ctx);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("SUDO setup failed [%d]: %s\n",
ret, strerror(ret)));
return ret;
}
return EOK;
}
int sdap_sudo_setup_tasks(struct sdap_id_ctx *id_ctx)
{
struct sdap_sudo_refresh_ctx *refresh_ctx = NULL;
struct timeval tv;
int ret = EOK;
bool refreshed = false;
bool refresh_enabled = dp_opt_get_bool(id_ctx->opts->basic,
SDAP_SUDO_REFRESH_ENABLED);
/* set up periodical update of sudo rules */
if (refresh_enabled) {
refresh_ctx = sdap_sudo_refresh_ctx_init(id_ctx, id_ctx->be, id_ctx,
id_ctx->opts,
tevent_timeval_zero());
if (refresh_ctx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE,
("sdap_sudo_refresh_ctx_init() failed!\n"));
return ENOMEM;
}
/* If this is the first startup, we need to kick off
* an refresh immediately, to close a window where
* clients requesting sudo information won't get an
* immediate reply with no entries
*/
ret = sysdb_sudo_get_refreshed(id_ctx->be->sysdb, &refreshed);
if (ret != EOK) {
return ret;
}
if (refreshed) {
/* At least one update 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.
*/
tv = tevent_timeval_current_ofs(10, 0);
DEBUG(SSSDBG_FUNC_DATA, ("Delaying first refresh of SUDO rules "
"for 10 seconds\n"));
} else {
/* This is our first startup. Schedule the
* update to start immediately once we
* enter the mainloop.
*/
tv = tevent_timeval_current();
}
ret = sdap_sudo_refresh_set_timer(refresh_ctx, tv);
if (ret != EOK) {
talloc_free(refresh_ctx);
return ret;
}
}
return EOK;
}
static void sdap_sudo_reply(struct tevent_req *req)
{
struct be_req *be_req = NULL;
int dp_error;
int error;
int ret;
be_req = tevent_req_callback_data(req, struct be_req);
ret = sdap_sudo_refresh_recv(req, &dp_error, &error);
talloc_zfree(req);
if (ret != EOK) {
sdap_handler_done(be_req, DP_ERR_FATAL, ret, strerror(ret));
return;
}
sdap_handler_done(be_req, dp_error, error, strerror(error));
}
void sdap_sudo_handler(struct be_req *be_req)
{
struct tevent_req *req = NULL;
struct be_sudo_req *sudo_req = NULL;
struct sdap_id_ctx *id_ctx = NULL;
int ret = EOK;
id_ctx = talloc_get_type(be_req->be_ctx->bet_info[BET_SUDO].pvt_bet_data,
struct sdap_id_ctx);
sudo_req = talloc_get_type(be_req->req_data, struct be_sudo_req);
/* get user info */
if (sudo_req->username != NULL) {
ret = sysdb_get_sudo_user_info(sudo_req, sudo_req->username,
id_ctx->be->sysdb,
&sudo_req->uid, &sudo_req->groups);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to get uid and groups of %s\n",
sudo_req->username));
goto fail;
}
} else {
sudo_req->uid = 0;
sudo_req->groups = NULL;
}
req = sdap_sudo_refresh_send(be_req, id_ctx->be, sudo_req, id_ctx->opts,
id_ctx->conn_cache);
if (req == NULL) {
ret = ENOMEM;
goto fail;
}
tevent_req_set_callback(req, sdap_sudo_reply, be_req);
return;
fail:
sdap_handler_done(be_req, DP_ERR_FATAL, ret, NULL);
}
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