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/*
SSSD
LDAP Identity Backend Module - subid ranges support
Copyright (C) 2021 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 "db/sysdb_subid.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ldap/sdap_async.h"
#include "providers/ldap/sdap_ops.h"
static int subid_ranges_get_retry(struct tevent_req *req);
static void subid_ranges_get_connect_done(struct tevent_req *subreq);
static void subid_ranges_get_search(struct tevent_req *req);
static void subid_ranges_get_done(struct tevent_req *subreq);
struct subid_ranges_get_state {
struct tevent_context *ev;
struct sdap_id_ctx *ctx;
struct sdap_domain *sdom;
struct sdap_id_conn_ctx *conn;
struct sdap_id_op *op;
struct sss_domain_info *domain;
char *filter;
char *name;
const char **attrs;
int dp_error;
int sdap_ret;
};
struct tevent_req *subid_ranges_get_send(TALLOC_CTX *memctx,
struct tevent_context *ev,
struct sdap_id_ctx *ctx,
struct sdap_domain *sdom,
struct sdap_id_conn_ctx *conn,
const char *filter_value,
const char *extra_value)
{
struct tevent_req *req;
struct subid_ranges_get_state *state;
int ret;
req = tevent_req_create(memctx, &state, struct subid_ranges_get_state);
if (!req) return NULL;
state->ev = ev;
state->ctx = ctx;
state->sdom = sdom;
state->conn = conn;
state->dp_error = DP_ERR_FATAL;
state->name = talloc_strdup(state, filter_value);
if (!state->name) {
DEBUG(SSSDBG_OP_FAILURE, "talloc_strdup failed\n");
ret = ENOMEM;
goto done;
}
state->op = sdap_id_op_create(state, state->conn->conn_cache);
if (!state->op) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_create failed\n");
ret = ENOMEM;
goto done;
}
state->domain = sdom->dom;
state->filter = talloc_asprintf(state,
"(&(%s=%s)(%s=%s))",
SYSDB_OBJECTCLASS,
ctx->opts->subid_map[SDAP_OC_SUBID_RANGE].name,
ctx->opts->subid_map[SDAP_AT_SUBID_RANGE_OWNER].name,
extra_value);
ret = subid_ranges_get_retry(req);
if (ret != EOK) {
goto done;
}
return req;
done:
if (ret != EOK) {
tevent_req_error(req, ret);
} else {
tevent_req_done(req);
}
return tevent_req_post(req, ev);
}
static int subid_ranges_get_retry(struct tevent_req *req)
{
struct subid_ranges_get_state *state = tevent_req_data(req,
struct subid_ranges_get_state);
struct tevent_req *subreq;
int ret = EOK;
subreq = sdap_id_op_connect_send(state->op, state, &ret);
if (!subreq) {
return ret;
}
tevent_req_set_callback(subreq, subid_ranges_get_connect_done, req);
return EOK;
}
static void subid_ranges_get_connect_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct subid_ranges_get_state *state = tevent_req_data(req,
struct subid_ranges_get_state);
int dp_error = DP_ERR_FATAL;
int ret;
ret = sdap_id_op_connect_recv(subreq, &dp_error);
talloc_zfree(subreq);
if (ret != EOK) {
state->dp_error = dp_error;
tevent_req_error(req, ret);
return;
}
subid_ranges_get_search(req);
}
static void subid_ranges_get_search(struct tevent_req *req)
{
struct subid_ranges_get_state *state = tevent_req_data(req,
struct subid_ranges_get_state);
struct tevent_req *subreq = NULL;
const char **attrs;
int ret;
ret = build_attrs_from_map(state, state->ctx->opts->subid_map,
SDAP_OPTS_SUBID_RANGE, NULL, &attrs, NULL);
if (ret != EOK) {
tevent_req_error(req, ENOMEM);
return;
}
subreq = sdap_search_bases_send(state, state->ev, state->ctx->opts,
sdap_id_op_handle(state->op),
state->sdom->subid_ranges_search_bases,
state->ctx->opts->subid_map,
false, /* allow_paging */
dp_opt_get_int(state->ctx->opts->basic,
SDAP_SEARCH_TIMEOUT),
state->filter,
attrs,
NULL);
talloc_free(attrs);
if (!subreq) {
tevent_req_error(req, ENOMEM);
return;
}
tevent_req_set_callback(subreq, subid_ranges_get_done, req);
}
static void subid_ranges_get_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct subid_ranges_get_state *state = tevent_req_data(req,
struct subid_ranges_get_state);
int dp_error = DP_ERR_FATAL;
int ret;
struct sysdb_attrs **results;
size_t num_results;
ret = sdap_search_bases_recv(subreq, state, &num_results, &results);
talloc_zfree(subreq);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
ret = sdap_id_op_done(state->op, ret, &dp_error);
if (dp_error == DP_ERR_OK && ret != EOK) {
/* retry */
ret = subid_ranges_get_retry(req);
if (ret != EOK) {
tevent_req_error(req, ret);
return;
}
return;
}
state->sdap_ret = ret;
if (ret && ret != ENOENT) {
DEBUG(SSSDBG_OP_FAILURE, "Failed to retrieve subid ranges.\n");
state->dp_error = dp_error;
tevent_req_error(req, ret);
return;
}
if (num_results == 0 || !results) {
DEBUG(SSSDBG_MINOR_FAILURE,
"No such user '%s' or user doesn't have subid range\n",
state->name);
sysdb_delete_subid_range(state->domain, state->name);
} else {
if (num_results > 1) {
DEBUG(SSSDBG_OP_FAILURE,
"Multiple subid ranges, only first will be processed\n");
}
/* store range */
sysdb_store_subid_range(state->domain, state->name,
state->domain->user_timeout,
results[0]);
}
state->dp_error = DP_ERR_OK;
tevent_req_done(req);
}
int subid_ranges_get_recv(struct tevent_req *req, int *dp_error_out,
int *sdap_ret)
{
struct subid_ranges_get_state *state = tevent_req_data(req,
struct subid_ranges_get_state);
if (dp_error_out) {
*dp_error_out = state->dp_error;
}
if (sdap_ret) {
*sdap_ret = state->sdap_ret;
}
TEVENT_REQ_RETURN_ON_ERROR(req);
return EOK;
}
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