/*
Authors:
Jan Cholasta <jcholast@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 "util/util.h"
#include "util/crypto/sss_crypto.h"
#include "db/sysdb_ssh.h"
#include "providers/ldap/ldap_common.h"
#include "providers/ipa/ipa_common.h"
#include "providers/ipa/ipa_hostid.h"
#include "providers/ipa/ipa_hosts.h"
struct hosts_get_state {
struct tevent_context *ev;
struct ipa_hostid_ctx *ctx;
struct sdap_id_op *op;
struct sss_domain_info *domain;
const char *name;
const char *alias;
size_t count;
struct sysdb_attrs **hosts;
int dp_error;
};
static errno_t
hosts_get_retry(struct tevent_req *req);
static void
hosts_get_connect_done(struct tevent_req *subreq);
static void
hosts_get_done(struct tevent_req *subreq);
struct tevent_req *
hosts_get_send(TALLOC_CTX *memctx,
struct tevent_context *ev,
struct ipa_hostid_ctx *hostid_ctx,
const char *name,
const char *alias)
{
struct tevent_req *req;
struct hosts_get_state *state;
struct sdap_id_ctx *ctx;
errno_t ret;
ctx = hostid_ctx->sdap_id_ctx;
req = tevent_req_create(memctx, &state, struct hosts_get_state);
if (!req) return NULL;
state->ev = ev;
state->ctx = hostid_ctx;
state->dp_error = DP_ERR_FATAL;
state->op = sdap_id_op_create(state, ctx->conn->conn_cache);
if (!state->op) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_create failed\n");
ret = ENOMEM;
goto fail;
}
state->domain = ctx->be->domain;
state->name = name;
state->alias = alias;
ret = hosts_get_retry(req);
if (ret != EOK) {
goto fail;
}
return req;
fail:
tevent_req_error(req, ret);
tevent_req_post(req, ev);
return req;
}
static errno_t
hosts_get_retry(struct tevent_req *req)
{
struct hosts_get_state *state = tevent_req_data(req,
struct hosts_get_state);
struct tevent_req *subreq;
errno_t ret = EOK;
subreq = sdap_id_op_connect_send(state->op, state, &ret);
if (!subreq) {
return ret;
}
tevent_req_set_callback(subreq, hosts_get_connect_done, req);
return EOK;
}
static void
hosts_get_connect_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct hosts_get_state *state = tevent_req_data(req,
struct hosts_get_state);
int dp_error = DP_ERR_FATAL;
errno_t 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;
}
subreq = ipa_host_info_send(state, state->ev,
sdap_id_op_handle(state->op),
state->ctx->sdap_id_ctx->opts, state->name,
state->ctx->ipa_opts->host_map, NULL,
state->ctx->host_search_bases);
if (!subreq) {
tevent_req_error(req, ENOMEM);
return;
}
tevent_req_set_callback(subreq, hosts_get_done, req);
}
static void
hosts_get_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq,
struct tevent_req);
struct hosts_get_state *state = tevent_req_data(req,
struct hosts_get_state);
int dp_error = DP_ERR_FATAL;
errno_t ret;
struct sysdb_attrs *attrs;
time_t now = time(NULL);
ret = ipa_host_info_recv(subreq, state,
&state->count, &state->hosts,
NULL, NULL);
talloc_zfree(subreq);
ret = sdap_id_op_done(state->op, ret, &dp_error);
if (dp_error == DP_ERR_OK && ret != EOK) {
/* retry */
ret = hosts_get_retry(req);
if (ret != EOK) {
goto done;
}
return;
}
if (ret != EOK && ret != ENOENT) {
goto done;
}
if (state->count == 0) {
DEBUG(SSSDBG_OP_FAILURE,
"No host with name [%s] found.\n", state->name);
ret = sysdb_delete_ssh_host(state->domain, state->name);
if (ret != EOK && ret != ENOENT) {
goto done;
}
ret = EINVAL;
goto done;
}
if (state->count > 1) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Found more than one host with name [%s].\n", state->name);
ret = EINVAL;
goto done;
}
attrs = sysdb_new_attrs(state);
if (!attrs) {
ret = ENOMEM;
goto done;
}
/* we are interested only in the host keys */
ret = sysdb_attrs_copy_values(state->hosts[0], attrs, SYSDB_SSH_PUBKEY);
if (ret != EOK) {
goto done;
}
ret = sysdb_store_ssh_host(state->domain, state->name, state->alias,
state->domain->ssh_host_timeout, now, attrs);
if (ret != EOK) {
goto done;
}
dp_error = DP_ERR_OK;
done:
state->dp_error = dp_error;
if (ret == EOK) {
tevent_req_done(req);
} else {
tevent_req_error(req, ret);
}
}
static errno_t
hosts_get_recv(struct tevent_req *req,
int *dp_error_out)
{
struct hosts_get_state *state = tevent_req_data(req,
struct hosts_get_state);
if (dp_error_out) {
*dp_error_out = state->dp_error;
}
TEVENT_REQ_RETURN_ON_ERROR(req);
return EOK;
}
struct ipa_hostid_handler_state {
struct dp_reply_std reply;
};
static void ipa_hostid_handler_done(struct tevent_req *subreq);
struct tevent_req *
ipa_hostid_handler_send(TALLOC_CTX *mem_ctx,
struct ipa_hostid_ctx *hostid_ctx,
struct dp_hostid_data *data,
struct dp_req_params *params)
{
struct ipa_hostid_handler_state *state;
struct tevent_req *subreq;
struct tevent_req *req;
errno_t ret;
req = tevent_req_create(mem_ctx, &state, struct ipa_hostid_handler_state);
if (req == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "tevent_req_create() failed\n");
return NULL;
}
subreq = hosts_get_send(state, params->ev, hostid_ctx,
data->name, data->alias);
if (subreq == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to send request\n");
ret = ENOMEM;
goto immediately;
}
tevent_req_set_callback(subreq, ipa_hostid_handler_done, req);
return req;
immediately:
dp_reply_std_set(&state->reply, DP_ERR_DECIDE, ret, NULL);
/* TODO For backward compatibility we always return EOK to DP now. */
tevent_req_done(req);
tevent_req_post(req, params->ev);
return req;
}
static void ipa_hostid_handler_done(struct tevent_req *subreq)
{
struct ipa_hostid_handler_state *state;
struct tevent_req *req;
int dp_error;
errno_t ret;
req = tevent_req_callback_data(subreq, struct tevent_req);
state = tevent_req_data(req, struct ipa_hostid_handler_state);
ret = hosts_get_recv(subreq, &dp_error);
talloc_zfree(subreq);
/* TODO For backward compatibility we always return EOK to DP now. */
dp_reply_std_set(&state->reply, dp_error, ret, NULL);
tevent_req_done(req);
}
errno_t
ipa_hostid_handler_recv(TALLOC_CTX *mem_ctx,
struct tevent_req *req,
struct dp_reply_std *data)
{
struct ipa_hostid_handler_state *state = NULL;
state = tevent_req_data(req, struct ipa_hostid_handler_state);
TEVENT_REQ_RETURN_ON_ERROR(req);
*data = state->reply;
return EOK;
}