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/*
SSSD
IPA Backend Module -- SELinux user maps (maps retrieval)
Authors:
Jan Zeleny <jzeleny@redhat.com>
Copyright (C) 2012 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 "providers/ipa/ipa_common.h"
#include "providers/ipa/ipa_selinux_maps.h"
struct ipa_selinux_get_maps_state {
struct tevent_context *ev;
struct sysdb_ctx *sysdb;
struct sdap_handle *sh;
struct sdap_options *opts;
struct ipa_options *ipa_opts;
const char **attrs;
struct sdap_search_base **search_bases;
int search_base_iter;
char *cur_filter;
char *maps_filter;
size_t map_count;
struct sysdb_attrs **maps;
};
static errno_t
ipa_selinux_get_maps_next(struct tevent_req *req,
struct ipa_selinux_get_maps_state *state);
static void
ipa_selinux_get_maps_done(struct tevent_req *subreq);
struct tevent_req *ipa_selinux_get_maps_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct sysdb_ctx *sysdb,
struct sdap_handle *sh,
struct sdap_options *opts,
struct ipa_options *ipa_opts,
struct sdap_search_base **search_bases)
{
struct tevent_req *req;
struct ipa_selinux_get_maps_state *state;
errno_t ret;
req = tevent_req_create(mem_ctx, &state, struct ipa_selinux_get_maps_state);
if (req == NULL) {
return NULL;
}
state->ev = ev;
state->sysdb = sysdb;
state->sh = sh;
state->opts = opts;
state->ipa_opts = ipa_opts;
state->search_bases = search_bases;
state->search_base_iter = 0;
state->map_count = 0;
state->maps = NULL;
ret = build_attrs_from_map(state, ipa_opts->selinuxuser_map,
IPA_OPTS_SELINUX_USERMAP, NULL,
&state->attrs, NULL);
if (ret != EOK) goto fail;
state->cur_filter = NULL;
state->maps_filter = talloc_asprintf(state,
"(&(objectclass=%s)(%s=TRUE))",
ipa_opts->selinuxuser_map[IPA_OC_SELINUX_USERMAP].name,
ipa_opts->selinuxuser_map[IPA_AT_SELINUX_USERMAP_ENABLED].name);
if (state->maps_filter == NULL) {
ret = ENOMEM;
goto fail;
}
ret = ipa_selinux_get_maps_next(req, state);
if (ret == EOK) {
ret = EINVAL;
}
if (ret != EAGAIN) {
goto fail;
}
return req;
fail:
tevent_req_error(req, ret);
tevent_req_post(req, ev);
return req;
}
static errno_t
ipa_selinux_get_maps_next(struct tevent_req *req,
struct ipa_selinux_get_maps_state *state)
{
struct sdap_search_base *base;
struct tevent_req *subreq;
base = state->search_bases[state->search_base_iter];
if (base == NULL) {
return EOK;
}
talloc_zfree(state->cur_filter);
state->cur_filter = sdap_get_id_specific_filter(state, state->maps_filter,
base->filter);
if (state->cur_filter == NULL) {
return ENOMEM;
}
DEBUG(SSSDBG_TRACE_FUNC, "Trying to fetch SELinux maps with following "
"parameters: [%d][%s][%s]\n", base->scope,
state->cur_filter, base->basedn);
subreq = sdap_get_generic_send(state, state->ev, state->opts,
state->sh, base->basedn,
base->scope, state->cur_filter,
state->attrs,
state->ipa_opts->selinuxuser_map,
IPA_OPTS_SELINUX_USERMAP,
dp_opt_get_int(state->opts->basic,
SDAP_ENUM_SEARCH_TIMEOUT),
true);
if (subreq == NULL) {
return ENOMEM;
}
tevent_req_set_callback(subreq, ipa_selinux_get_maps_done, req);
return EAGAIN;
}
static void ipa_selinux_get_maps_done(struct tevent_req *subreq)
{
errno_t ret;
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct ipa_selinux_get_maps_state *state = tevent_req_data(req,
struct ipa_selinux_get_maps_state);
struct sysdb_attrs **results;
size_t total_count;
size_t count;
int i;
ret = sdap_get_generic_recv(subreq, state, &count, &results);
if (ret != EOK) {
goto done;
}
if (count > 0) {
DEBUG(SSSDBG_TRACE_FUNC,
"Found %zu user maps in current search base\n", count);
total_count = count + state->map_count;
state->maps = talloc_realloc(state, state->maps, struct sysdb_attrs *, total_count);
if (state->maps == NULL) {
ret = ENOMEM;
goto done;
}
i = 0;
while (state->map_count < total_count) {
state->maps[state->map_count] = talloc_steal(state->maps, results[i]);
state->map_count++;
i++;
}
}
state->search_base_iter++;
ret = ipa_selinux_get_maps_next(req, state);
if (ret == EAGAIN) {
return;
} else if (ret != EOK) {
goto done;
}
if (state->map_count == 0) {
DEBUG(SSSDBG_TRACE_FUNC, "No SELinux user maps found!\n");
ret = ENOENT;
}
done:
if (ret != EOK) {
tevent_req_error(req, ret);
} else {
tevent_req_done(req);
}
}
errno_t
ipa_selinux_get_maps_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
size_t *count,
struct sysdb_attrs ***maps)
{
struct ipa_selinux_get_maps_state *state =
tevent_req_data(req, struct ipa_selinux_get_maps_state);
TEVENT_REQ_RETURN_ON_ERROR(req);
*count = state->map_count;
*maps = talloc_steal(mem_ctx, state->maps);
return EOK;
}
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