responder_get_domains.c revision aac3ca699a09090072ae4d68bdda8dec990ae393
/*
Authors:
Jan Zeleny <jzeleny@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 "util/util.h"
#include "responder/common/responder.h"
#include "providers/data_provider.h"
#include "db/sysdb.h"
struct sss_dp_domains_info {
struct resp_ctx *rctx;
struct sss_domain_info *dom;
const char *hint;
bool force;
struct sss_dp_req_state *state;
};
static DBusMessage *sss_dp_get_domains_msg(void *pvt);
static errno_t get_domains_next(struct tevent_req *req);
static void sss_dp_get_domains_callback(struct tevent_req *subreq);
static errno_t get_domains_done(struct tevent_req *req);
static errno_t check_last_request(struct resp_ctx *rctx, const char *hint);
struct tevent_req *sss_dp_get_domains_send(TALLOC_CTX *mem_ctx,
struct resp_ctx *rctx,
bool force,
const char *hint)
{
errno_t ret;
struct tevent_req *req;
struct sss_dp_domains_info *info;
req = tevent_req_create(mem_ctx, &info, struct sss_dp_domains_info);
if (req == NULL) {
return NULL;
}
if (rctx->domains == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("No domains configured.\n"));
ret = EINVAL;
goto immediately;
}
if (!force) {
ret = check_last_request(rctx, hint);
if (ret == EOK) {
DEBUG(SSSDBG_TRACE_FUNC,
("Last call was too recent, nothing to do!\n"));
goto immediately;
} else if (ret != EAGAIN) {
DEBUG(SSSDBG_TRACE_FUNC, ("check_domain_request failed with [%d][%s]\n",
ret, strerror(ret)));
goto immediately;
}
}
info->rctx = rctx;
info->dom = rctx->domains;
info->force = force;
if (hint != NULL) {
info->hint = hint;
} else {
info->hint = talloc_strdup(info, "");
if (info->hint == NULL) {
ret = ENOMEM;
goto immediately;
}
}
ret = get_domains_next(req);
if (ret != EAGAIN) {
goto immediately;
}
return req;
immediately:
if (ret == EOK) {
tevent_req_done(req);
} else {
tevent_req_error(req, ret);
}
tevent_req_post(req, rctx->ev);
return req;
}
static errno_t get_domains_next(struct tevent_req *req)
{
struct sss_dp_domains_info *info;
struct tevent_req *subreq;
struct sss_dp_req_state *state;
errno_t ret;
char *key;
info = tevent_req_data(req, struct sss_dp_domains_info);
/* Skip all local domains. */
while(info->dom != NULL && !NEED_CHECK_PROVIDER(info->dom->provider)) {
info->dom = info->dom->next;
}
if (info->dom == NULL) {
return EOK;
}
subreq = tevent_req_create(info, &state, struct sss_dp_req_state);
if (subreq == NULL) {
return ENOMEM;
}
key = talloc_asprintf(info, "domains@%s", info->dom->name);
if (key == NULL) {
talloc_free(subreq);
return ENOMEM;
}
ret = sss_dp_issue_request(info, info->rctx, key, info->dom,
sss_dp_get_domains_msg, info, subreq);
talloc_free(key);
if (ret != EOK) {
talloc_free(subreq);
return ret;
}
tevent_req_set_callback(subreq, sss_dp_get_domains_callback, req);
return EAGAIN;
}
static DBusMessage *
sss_dp_get_domains_msg(void *pvt)
{
struct sss_dp_domains_info *info;
DBusMessage *msg = NULL;
dbus_bool_t dbret;
info = talloc_get_type(pvt, struct sss_dp_domains_info);
msg = dbus_message_new_method_call(NULL,
DP_PATH,
DP_INTERFACE,
DP_METHOD_GETDOMAINS);
if (msg == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Out of memory?!\n"));
return NULL;
}
DEBUG(SSSDBG_TRACE_FUNC,
("Sending get domains request for [%s][%sforced][%s]\n",
info->dom->name, info->force ? "" : "not ", info->hint));
/* Send the hint argument to provider as well. This will
* be useful for some cases of transitional trust where
* the server might not know all trusted domains
*/
dbret = dbus_message_append_args(msg,
DBUS_TYPE_BOOLEAN, &info->force,
DBUS_TYPE_STRING, &info->hint,
DBUS_TYPE_INVALID);
if (!dbret) {
DEBUG(SSSDBG_OP_FAILURE ,("Failed to build message\n"));
dbus_message_unref(msg);
return NULL;
}
return msg;
}
static void sss_dp_get_domains_callback(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq, struct tevent_req);
struct sss_dp_domains_info *info = tevent_req_data(req, struct sss_dp_domains_info);
errno_t ret;
dbus_uint16_t dp_err;
dbus_uint32_t dp_ret;
char *err_msg;
/* TODO: handle errors better */
ret = sss_dp_req_recv(info, subreq, &dp_err, &dp_ret, &err_msg);
talloc_free(subreq);
if (ret != EOK) {
goto fail;
}
ret = get_domains_done(req);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("get_domains_done failed, "
"trying next domain.\n"));
goto fail;
}
info->dom = info->dom->next;
ret = get_domains_next(req);
if (ret == EOK) {
tevent_req_done(req);
} else if (ret != EAGAIN) {
goto fail;
}
return;
fail:
tevent_req_error(req, ret);
return;
}
static errno_t get_domains_done(struct tevent_req *req)
{
int ret;
size_t c;
struct sss_dp_domains_info *state;
struct sss_domain_info *domain;
struct sss_domain_info **new_sd_list = NULL;
size_t subdomain_count;
struct sysdb_subdom **subdomains;
struct sysdb_subdom *master_info;
state = tevent_req_data(req, struct sss_dp_domains_info);
domain = state->dom;
/* Retrieve all subdomains of this domain from sysdb
* and create their struct sss_domain_info representations
*/
ret = sysdb_get_subdomains(domain, domain->sysdb,
&subdomain_count, &subdomains);
if (ret != EOK) {
DEBUG(SSSDBG_FUNC_DATA, ("sysdb_get_subdomains failed.\n"));
goto done;
}
if (subdomain_count == 0) {
talloc_zfree(domain->subdomains);
domain->subdomain_count = 0;
goto done;
}
new_sd_list = talloc_zero_array(domain, struct sss_domain_info *,
subdomain_count);
if (new_sd_list == NULL) {
ret = ENOMEM;
goto done;
}
for (c = 0; c < subdomain_count; c++) {
DEBUG(SSSDBG_FUNC_DATA, ("Adding subdomain [%s] to the domain [%s]!\n",
subdomains[c]->name, domain->name));
new_sd_list[c] = new_subdomain(new_sd_list, domain,
subdomains[c]->name,
subdomains[c]->flat_name,
subdomains[c]->id);
if (new_sd_list[c] == NULL) {
ret = ENOMEM;
goto done;
}
}
/* Link all subdomains into single-linked list
* (the list is used when processing all domains)
*/
while (c > 1) {
new_sd_list[c-1]->next = new_sd_list[c];
--c;
}
if (domain->flat_name == NULL) {
ret = sysdb_master_domain_get_info(domain, domain->sysdb, &master_info);
if (ret != EOK) {
DEBUG(SSSDBG_FUNC_DATA, ("sysdb_master_domain_get_info " \
"failed.\n"));
goto done;
}
domain->flat_name = talloc_strdup(domain, master_info->flat_name);
talloc_free(master_info);
DEBUG(SSSDBG_TRACE_LIBS, ("Adding flat name [%s] to domain [%s].\n",
domain->flat_name, domain->name));
}
errno = 0;
ret = gettimeofday(&domain->subdomains_last_checked, NULL);
if (ret == -1) {
ret = errno;
goto done;
}
domain->subdomain_count = subdomain_count;
talloc_zfree(domain->subdomains);
domain->subdomains = new_sd_list;
new_sd_list = NULL;
ret = EOK;
done:
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("Failed to update sub-domains "
"of domain [%s].\n", domain->name));
talloc_free(new_sd_list);
}
return ret;
}
errno_t sss_dp_get_domains_recv(struct tevent_req *req)
{
TEVENT_REQ_RETURN_ON_ERROR(req);
return EOK;
}
static errno_t check_last_request(struct resp_ctx *rctx, const char *hint)
{
struct sss_domain_info *dom;
time_t now = time(NULL);
time_t diff;
int i;
diff = now-rctx->get_domains_last_call.tv_sec;
if (diff >= rctx->domains_timeout) {
/* Timeout, expired, fetch domains again */
return EAGAIN;
}
if (hint != NULL) {
dom = rctx->domains;
while (dom) {
for (i = 0; i< dom->subdomain_count; i++) {
if (strcasecmp(dom->subdomains[i]->name, hint) == 0) {
diff = now-dom->subdomains_last_checked.tv_sec;
if (diff >= rctx->domains_timeout) {
/* Timeout, expired, fetch domains again */
return EAGAIN;
}
/* Skip the rest of this domain, but check other domains
* perhaps this subdomain will be also a part of another
* domain where it will need refreshing
*/
break;
}
}
dom = dom->next;
}
}
return EOK;
}