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/*
SSSD
ipa_dyndns.c
Authors:
Stephen Gallagher <sgallagh@redhat.com>
Copyright (C) 2010 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 <ctype.h>
#include "util/util.h"
#include "providers/ldap/sdap_dyndns.h"
#include "providers/ipa/ipa_common.h"
#include "providers/ipa/ipa_dyndns.h"
#include "providers/data_provider.h"
#include "providers/be_dyndns.h"
struct ipa_dyndns_update_state {
struct ipa_options *ipa_ctx;
struct sdap_id_op *sdap_op;
};
static void
ipa_dyndns_sdap_update_done(struct tevent_req *subreq);
static struct tevent_req *
ipa_dyndns_update_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct be_ctx *be_ctx,
struct be_ptask *be_ptask,
void *pvt);
static errno_t
ipa_dyndns_update_recv(struct tevent_req *req);
static void
ipa_dyndns_update_connect_done(struct tevent_req *subreq);
errno_t ipa_dyndns_init(struct be_ctx *be_ctx,
struct ipa_options *ctx)
{
errno_t ret;
const time_t ptask_first_delay = 10;
int period;
int offset;
uint32_t extraflags = 0;
ctx->be_res = be_ctx->be_res;
if (ctx->be_res == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "Resolver must be initialized in order "
"to use the IPA dynamic DNS updates\n");
return EINVAL;
}
period = dp_opt_get_int(ctx->dyndns_ctx->opts, DP_OPT_DYNDNS_REFRESH_INTERVAL);
if (period == 0) {
DEBUG(SSSDBG_TRACE_FUNC, "DNS will not be updated periodically, "
"dyndns_refresh_interval is 0\n");
extraflags |= BE_PTASK_NO_PERIODIC;
offset = 0;
} else {
offset = dp_opt_get_int(ctx->dyndns_ctx->opts, DP_OPT_DYNDNS_REFRESH_OFFSET);
}
ret = be_ptask_create(ctx, be_ctx, period, ptask_first_delay, 0, offset,
period, 0,
ipa_dyndns_update_send, ipa_dyndns_update_recv, ctx,
"Dyndns update",
extraflags |
BE_PTASK_OFFLINE_DISABLE |
BE_PTASK_SCHEDULE_FROM_LAST,
NULL);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unable to setup ptask "
"[%d]: %s\n", ret, sss_strerror(ret));
}
return ret;
}
static struct tevent_req *
ipa_dyndns_update_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct be_ctx *be_ctx,
struct be_ptask *be_ptask,
void *pvt)
{
int ret;
struct ipa_options *ctx;
struct ipa_dyndns_update_state *state;
struct tevent_req *req, *subreq;
struct sdap_id_ctx *sdap_ctx;
DEBUG(SSSDBG_TRACE_FUNC, "Performing update\n");
ctx = talloc_get_type(pvt, struct ipa_options);
sdap_ctx = ctx->id_ctx->sdap_id_ctx;
req = tevent_req_create(ctx, &state, struct ipa_dyndns_update_state);
if (req == NULL) {
return NULL;
}
state->ipa_ctx = ctx;
if (ctx->dyndns_ctx->last_refresh + 60 > time(NULL) ||
ctx->dyndns_ctx->timer_in_progress) {
DEBUG(SSSDBG_FUNC_DATA, "Last periodic update ran recently or timer "
"in progress, not scheduling another update\n");
tevent_req_done(req);
tevent_req_post(req, sdap_ctx->be->ev);
return req;
}
state->ipa_ctx->dyndns_ctx->last_refresh = time(NULL);
/* Make sure to have a valid LDAP connection */
state->sdap_op = sdap_id_op_create(state, sdap_ctx->conn->conn_cache);
if (state->sdap_op == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_create failed\n");
ret = ENOMEM;
goto done;
}
subreq = sdap_id_op_connect_send(state->sdap_op, state, &ret);
if (!subreq) {
DEBUG(SSSDBG_OP_FAILURE, "sdap_id_op_connect_send failed: [%d](%s)\n",
ret, sss_strerror(ret));
ret = ENOMEM;
goto done;
}
tevent_req_set_callback(subreq, ipa_dyndns_update_connect_done, req);
ret = EOK;
done:
if (ret != EOK) {
tevent_req_error(req, ret);
tevent_req_post(req, sdap_ctx->be->ev);
}
return req;
}
static void
ipa_dyndns_update_connect_done(struct tevent_req *subreq)
{
int dp_error;
int ret;
struct ipa_options *ctx;
struct tevent_req *req;
struct ipa_dyndns_update_state *state;
struct sdap_id_ctx *sdap_ctx;
req = tevent_req_callback_data(subreq, struct tevent_req);
state = tevent_req_data(req, struct ipa_dyndns_update_state);
ret = sdap_id_op_connect_recv(subreq, &dp_error);
talloc_zfree(subreq);
if (ret != EOK) {
if (dp_error == DP_ERR_OFFLINE) {
DEBUG(SSSDBG_MINOR_FAILURE, "No server is available, "
"dynamic DNS update is skipped in offline mode.\n");
tevent_req_error(req, ERR_DYNDNS_OFFLINE);
} else {
DEBUG(SSSDBG_OP_FAILURE,
"Failed to connect to LDAP server: [%d](%s)\n",
ret, sss_strerror(ret));
tevent_req_error(req, ERR_NETWORK_IO);
}
return;
}
ctx = state->ipa_ctx;
sdap_ctx = ctx->id_ctx->sdap_id_ctx;
/* The following three checks are here to prevent SEGFAULT
* from ticket #3076. */
if (ctx->service == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "service structure not initialized\n");
ret = EINVAL;
goto done;
}
if (ctx->service->sdap == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "sdap structure not initialized\n");
ret = EINVAL;
goto done;
}
if (ctx->service->sdap->uri == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "LDAP uri not set\n");
ret = EINVAL;
goto done;
}
if (strncmp(ctx->service->sdap->uri,
"ldap://", 7) != 0) {
DEBUG(SSSDBG_CRIT_FAILURE, "Unexpected format of LDAP URI.\n");
ret = EIO;
goto done;
}
subreq = sdap_dyndns_update_send(state, sdap_ctx->be->ev,
sdap_ctx->be,
ctx->dyndns_ctx->opts,
sdap_ctx,
ctx->dyndns_ctx->auth_type,
ctx->dyndns_ctx->auth_ptr_type,
dp_opt_get_string(ctx->dyndns_ctx->opts,
DP_OPT_DYNDNS_IFACE),
dp_opt_get_string(ctx->basic,
IPA_HOSTNAME),
dp_opt_get_string(ctx->basic,
IPA_KRB5_REALM),
dp_opt_get_int(ctx->dyndns_ctx->opts,
DP_OPT_DYNDNS_TTL),
true);
if (!subreq) {
ret = EIO;
DEBUG(SSSDBG_OP_FAILURE,
"sdap_id_op_connect_send failed: [%d](%s)\n",
ret, sss_strerror(ret));
goto done;
}
tevent_req_set_callback(subreq, ipa_dyndns_sdap_update_done, req);
ret = EOK;
done:
if (ret != EOK) {
tevent_req_error(req, ret);
tevent_req_post(req, sdap_ctx->be->ev);
}
}
static void ipa_dyndns_sdap_update_done(struct tevent_req *subreq)
{
struct tevent_req *req = tevent_req_callback_data(subreq, struct tevent_req);
errno_t ret;
ret = sdap_dyndns_update_recv(subreq);
talloc_zfree(subreq);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE,
"Dynamic DNS update failed [%d]: %s\n", ret, sss_strerror(ret));
tevent_req_error(req, ret);
return;
}
tevent_req_done(req);
}
static errno_t ipa_dyndns_update_recv(struct tevent_req *req)
{
TEVENT_REQ_RETURN_ON_ERROR(req);
return EOK;
}
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