sysdb_services.c revision eb29ae58117ca88868491fe2240e27393c7a9068
/*
SSSD
Authors:
Stephen Gallagher <sgallagh@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 "db/sysdb.h"
#include "db/sysdb_private.h"
#include "db/sysdb_services.h"
errno_t
sysdb_svc_add(TALLOC_CTX *mem_ctx,
struct sysdb_ctx *sysdb,
const char *primary_name,
int port,
const char **aliases,
const char **protocols,
struct ldb_dn **dn);
static errno_t
sysdb_svc_update(struct sysdb_ctx *sysdb,
struct ldb_dn *dn,
int port,
const char **aliases,
const char **protocols);
errno_t
sysdb_svc_remove_alias(struct sysdb_ctx *sysdb,
struct ldb_dn *dn,
const char *alias);
errno_t
sysdb_getservbyname(TALLOC_CTX *mem_ctx,
struct sysdb_ctx *sysdb,
const char *name,
const char *proto,
struct ldb_result **_res)
{
errno_t ret;
int lret;
TALLOC_CTX *tmp_ctx;
static const char *attrs[] = SYSDB_SVC_ATTRS;
struct ldb_dn *base_dn;
struct ldb_result *res;
char *sanitized_name;
char *sanitized_proto;
*_res = NULL;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) {
return ENOMEM;
}
base_dn = ldb_dn_new_fmt(tmp_ctx, sysdb->ldb,
SYSDB_TMPL_SVC_BASE,
sysdb->domain->name);
if (!base_dn) {
ret = ENOMEM;
goto done;
}
ret = sss_filter_sanitize(tmp_ctx, name, &sanitized_name);
if (ret != EOK) {
goto done;
}
if (proto) {
ret = sss_filter_sanitize(tmp_ctx, proto, &sanitized_proto);
if (ret != EOK) {
goto done;
}
}
lret = ldb_search(sysdb->ldb, tmp_ctx, &res, base_dn,
LDB_SCOPE_SUBTREE, attrs,
SYSDB_SVC_BYNAME_FILTER,
proto?sanitized_proto:"*",
sanitized_name, sanitized_name);
if (lret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(lret);
goto done;
}
if (res->count == 0) {
ret = ENOENT;
goto done;
}
*_res = talloc_steal(mem_ctx, res);
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t
sysdb_getservbyport(TALLOC_CTX *mem_ctx,
struct sysdb_ctx *sysdb,
int port,
const char *proto,
struct ldb_result **_res)
{
errno_t ret;
int lret;
TALLOC_CTX *tmp_ctx;
static const char *attrs[] = SYSDB_SVC_ATTRS;
struct ldb_dn *base_dn;
struct ldb_result *res;
char *sanitized_proto = NULL;
if (port <= 0) {
return EINVAL;
}
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) {
return ENOMEM;
}
base_dn = ldb_dn_new_fmt(tmp_ctx, sysdb->ldb,
SYSDB_TMPL_SVC_BASE,
sysdb->domain->name);
if (!base_dn) {
ret = ENOMEM;
goto done;
}
if (proto) {
ret = sss_filter_sanitize(tmp_ctx, proto, &sanitized_proto);
if (ret != EOK) {
goto done;
}
}
lret = ldb_search(sysdb->ldb, tmp_ctx, &res, base_dn,
LDB_SCOPE_SUBTREE, attrs,
SYSDB_SVC_BYPORT_FILTER,
sanitized_proto?sanitized_proto:"*",
(unsigned int) port);
if (lret) {
ret = sysdb_error_to_errno(lret);
goto done;
}
if (res->count == 0) {
ret = ENOENT;
goto done;
}
*_res = talloc_steal(mem_ctx, res);
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t
sysdb_store_service(struct sysdb_ctx *sysdb,
const char *primary_name,
int port,
const char **aliases,
const char **protocols,
struct sysdb_attrs *extra_attrs,
char **remove_attrs,
uint64_t cache_timeout,
time_t now)
{
errno_t ret;
errno_t sret;
TALLOC_CTX *tmp_ctx;
bool in_transaction = false;
struct ldb_result *res = NULL;
const char *name;
unsigned int i;
struct ldb_dn *update_dn = NULL;
struct sysdb_attrs *attrs;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) return ENOMEM;
ret = sysdb_transaction_start(sysdb);
if (ret != EOK) goto done;
in_transaction = true;
/* Check that the port is unique
* If the port appears for any service other than
* the one matching the primary_name, we need to
* remove them so that getservbyport() can work
* properly. Last entry saved to the cache should
* always "win".
*/
ret = sysdb_getservbyport(tmp_ctx, sysdb, port, NULL, &res);
if (ret != EOK && ret != ENOENT) {
goto done;
} else if (ret != ENOENT) {
if (res->count != 1) {
/* Somehow the cache has multiple entries with
* the same port. This is corrupted. We'll delete
* them all to sort it out.
*/
for (i = 0; i < res->count; i++) {
DEBUG(SSSDBG_TRACE_FUNC,
("Corrupt cache entry [%s] detected. Deleting\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[i]->dn)));
ret = sysdb_delete_entry(sysdb, res->msgs[i]->dn, true);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not delete corrupt cache entry [%s]\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[i]->dn)));
goto done;
}
}
} else {
/* Check whether this is the same name as we're currently
* saving to the cache.
*/
name = ldb_msg_find_attr_as_string(res->msgs[0],
SYSDB_NAME,
NULL);
if (!name || strcmp(name, primary_name) != 0) {
if (!name) {
DEBUG(SSSDBG_CRIT_FAILURE,
("A service with no name?\n"));
/* Corrupted */
}
/* Either this is a corrupt entry or it's another service
* claiming ownership of this port. In order to account
* for port reassignments, we need to delete the old entry.
*/
DEBUG(SSSDBG_TRACE_FUNC,
("Corrupt or replaced cache entry [%s] detected. "
"Deleting\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[0]->dn)));
ret = sysdb_delete_entry(sysdb, res->msgs[0]->dn, true);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not delete cache entry [%s]\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[0]->dn)));
}
}
}
}
talloc_zfree(res);
/* Ok, ports should now be unique. Now look
* the service up by name to determine if we
* need to update existing entries or modify
* aliases.
*/
ret = sysdb_getservbyname(tmp_ctx, sysdb, primary_name, NULL, &res);
if (ret != EOK && ret != ENOENT) {
goto done;
} else if (ret != ENOENT) { /* Found entries */
for (i = 0; i < res->count; i++) {
/* Check whether this is the same name as we're currently
* saving to the cache.
*/
name = ldb_msg_find_attr_as_string(res->msgs[i],
SYSDB_NAME,
NULL);
if (!name) {
/* Corrupted */
DEBUG(SSSDBG_CRIT_FAILURE,
("A service with no name?\n"));
DEBUG(SSSDBG_TRACE_FUNC,
("Corrupt cache entry [%s] detected. Deleting\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[i]->dn)));
ret = sysdb_delete_entry(sysdb, res->msgs[i]->dn, true);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not delete corrupt cache entry [%s]\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[i]->dn)));
goto done;
}
} else if (strcmp(name, primary_name) == 0) {
/* This is the same service name, so we need
* to update this entry with the values
* provided.
*/
if(update_dn) {
DEBUG(SSSDBG_CRIT_FAILURE,
("Two existing services with the same name: [%s]? "
"Deleting both.\n",
primary_name));
/* Delete the entry from the previous pass */
ret = sysdb_delete_entry(sysdb, update_dn, true);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not delete cache entry [%s]\n",
ldb_dn_canonical_string(tmp_ctx,
update_dn)));
goto done;
}
/* Delete the new entry as well */
ret = sysdb_delete_entry(sysdb, res->msgs[i]->dn, true);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not delete cache entry [%s]\n",
ldb_dn_canonical_string(tmp_ctx,
res->msgs[i]->dn)));
goto done;
}
update_dn = NULL;
} else {
update_dn = talloc_steal(tmp_ctx, res->msgs[i]->dn);
}
} else {
/* Another service is claiming this name as an alias.
* In order to account for aliases being promoted to
* primary names, we need to make sure to remove the
* old alias entry.
*/
ret = sysdb_svc_remove_alias(sysdb,
res->msgs[i]->dn,
primary_name);
if (ret != EOK) goto done;
}
}
talloc_zfree(res);
}
if (update_dn) {
/* Update the existing entry */
ret = sysdb_svc_update(sysdb, update_dn, port, aliases, protocols);
} else {
/* Add a new entry */
ret = sysdb_svc_add(tmp_ctx, sysdb, primary_name, port,
aliases, protocols, &update_dn);
}
if (ret != EOK) goto done;
/* Set the cache timeout */
if (!extra_attrs) {
attrs = sysdb_new_attrs(tmp_ctx);
if (!attrs) {
ret = ENOMEM;
goto done;
}
} else {
attrs = extra_attrs;
}
ret = sysdb_attrs_add_time_t(attrs, SYSDB_LAST_UPDATE, now);
if (ret) goto done;
ret = sysdb_attrs_add_time_t(attrs, SYSDB_CACHE_EXPIRE,
((cache_timeout) ?
(now + cache_timeout) : 0));
if (ret) goto done;
ret = sysdb_set_entry_attr(sysdb, update_dn, attrs, SYSDB_MOD_REP);
if (ret != EOK) goto done;
if (remove_attrs) {
ret = sysdb_remove_attrs(sysdb, primary_name,
SYSDB_MEMBER_SERVICE,
remove_attrs);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
("Could not remove missing attributes: [%s]\n",
strerror(ret)));
goto done;
}
}
ret = sysdb_transaction_commit(sysdb);
if (ret == EOK) in_transaction = false;
done:
if (in_transaction) {
sret = sysdb_transaction_cancel(sysdb);
if (sret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Could not cancel transaction\n"));
}
}
talloc_free(tmp_ctx);
return ret;
}
struct ldb_dn *
sysdb_svc_dn(struct sysdb_ctx *sysdb, TALLOC_CTX *mem_ctx,
const char *domain, const char *name)
{
errno_t ret;
char *clean_name;
struct ldb_dn *dn;
ret = sysdb_dn_sanitize(NULL, name, &clean_name);
if (ret != EOK) {
return NULL;
}
dn = ldb_dn_new_fmt(mem_ctx, sysdb->ldb, SYSDB_TMPL_SVC,
clean_name, domain);
talloc_free(clean_name);
return dn;
}
errno_t
sysdb_svc_add(TALLOC_CTX *mem_ctx,
struct sysdb_ctx *sysdb,
const char *primary_name,
int port,
const char **aliases,
const char **protocols,
struct ldb_dn **dn)
{
errno_t ret;
int lret;
TALLOC_CTX *tmp_ctx;
struct ldb_message *msg;
unsigned long i;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) return ENOMEM;
msg = ldb_msg_new(tmp_ctx);
if (!msg) {
ret = ENOMEM;
goto done;
}
/* svc dn */
msg->dn = sysdb_svc_dn(sysdb, msg, sysdb->domain->name, primary_name);
if (!msg->dn) {
ret = ENOMEM;
goto done;
}
/* Objectclass */
ret = add_string(msg, LDB_FLAG_MOD_ADD,
SYSDB_OBJECTCLASS, SYSDB_SVC_CLASS);
if (ret != EOK) goto done;
/* Set the primary name */
ret = add_string(msg, LDB_FLAG_MOD_ADD,
SYSDB_NAME, primary_name);
if (ret != EOK) goto done;
/* Set the port number */
ret = add_ulong(msg, LDB_FLAG_MOD_ADD,
SYSDB_SVC_PORT, port);
if (ret != EOK) goto done;
/* If this service has any aliases, include them */
if (aliases && aliases[0]) {
/* Set the name aliases */
lret = ldb_msg_add_empty(msg, SYSDB_NAME_ALIAS,
LDB_FLAG_MOD_ADD, NULL);
if (lret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(lret);
goto done;
}
for (i=0; aliases[i]; i++) {
lret = ldb_msg_add_string(msg, SYSDB_NAME_ALIAS, aliases[i]);
if (lret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(lret);
goto done;
}
}
}
/* Set the protocols */
lret = ldb_msg_add_empty(msg, SYSDB_SVC_PROTO,
LDB_FLAG_MOD_ADD, NULL);
if (lret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(lret);
goto done;
}
for (i=0; protocols[i]; i++) {
lret = ldb_msg_add_string(msg, SYSDB_SVC_PROTO, protocols[i]);
if (lret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(lret);
goto done;
}
}
/* creation time */
ret = add_ulong(msg, LDB_FLAG_MOD_ADD, SYSDB_CREATE_TIME,
(unsigned long)time(NULL));
if (ret) goto done;
lret = ldb_add(sysdb->ldb, msg);
ret = sysdb_error_to_errno(lret);
if (ret == EOK && dn) {
*dn = talloc_steal(mem_ctx, msg->dn);
}
done:
if (ret) {
DEBUG(SSSDBG_TRACE_INTERNAL,
("Error: %d (%s)\n", ret, strerror(ret)));
}
talloc_free(tmp_ctx);
return ret;
}
static errno_t
sysdb_svc_update(struct sysdb_ctx *sysdb,
struct ldb_dn *dn,
int port,
const char **aliases,
const char **protocols)
{
errno_t ret;
struct ldb_message *msg;
int lret;
unsigned int i;
if (!dn || !protocols || !protocols[0]) {
return EINVAL;
}
msg = ldb_msg_new(NULL);
if (!msg) {
ret = ENOMEM;
goto done;
}
msg->dn = dn;
/* Update the port */
ret = add_ulong(msg, SYSDB_MOD_REP,
SYSDB_SVC_PORT, port);
if (ret != EOK) goto done;
if (aliases && aliases[0]) {
/* Update the aliases */
lret = ldb_msg_add_empty(msg, SYSDB_NAME_ALIAS, SYSDB_MOD_REP, NULL);
if (lret != LDB_SUCCESS) {
ret = ENOMEM;
goto done;
}
for (i = 0; aliases[i]; i++) {
lret = ldb_msg_add_fmt(msg, SYSDB_NAME_ALIAS, "%s", aliases[i]);
if (lret != LDB_SUCCESS) {
ret = EINVAL;
goto done;
}
}
}
/* Update the protocols */
lret = ldb_msg_add_empty(msg, SYSDB_SVC_PROTO, SYSDB_MOD_REP, NULL);
if (lret != LDB_SUCCESS) {
ret = ENOMEM;
goto done;
}
for (i = 0; protocols[i]; i++) {
lret = ldb_msg_add_fmt(msg, SYSDB_SVC_PROTO, "%s", protocols[i]);
if (lret != LDB_SUCCESS) {
ret = EINVAL;
goto done;
}
}
lret = ldb_modify(sysdb->ldb, msg);
ret = sysdb_error_to_errno(lret);
done:
if (ret) {
DEBUG(SSSDBG_TRACE_INTERNAL,
("Error: %d (%s)\n", ret, strerror(ret)));
}
talloc_free(msg);
return ret;
}
errno_t
sysdb_svc_remove_alias(struct sysdb_ctx *sysdb,
struct ldb_dn *dn,
const char *alias)
{
errno_t ret;
struct ldb_message *msg;
int lret;
msg = ldb_msg_new(NULL);
if (!msg) {
ret = ENOMEM;
goto done;
}
msg->dn = dn;
ret = add_string(msg, SYSDB_MOD_DEL,
SYSDB_NAME_ALIAS, alias);
if (ret != EOK) goto done;
lret = ldb_modify(sysdb->ldb, msg);
ret = sysdb_error_to_errno(lret);
done:
if (ret) {
DEBUG(SSSDBG_TRACE_INTERNAL,
("Error: %d (%s)\n", ret, strerror(ret)));
}
talloc_zfree(msg);
return ret;
}
errno_t
sysdb_svc_delete(struct sysdb_ctx *sysdb,
const char *name,
int port,
const char *proto)
{
errno_t ret, sret;
TALLOC_CTX *tmp_ctx;
struct ldb_result *res;
unsigned int i;
bool in_transaction = false;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) {
return ENOMEM;
}
ret = sysdb_transaction_start(sysdb);
if (ret != EOK) goto done;
in_transaction = true;
if (name) {
ret = sysdb_getservbyname(tmp_ctx, sysdb, name, proto, &res);
if (ret != EOK && ret != ENOENT) goto done;
if (ret == ENOENT) {
/* Doesn't exist in the DB. Nothing to do */
ret = EOK;
goto done;
}
} else {
ret = sysdb_getservbyport(tmp_ctx, sysdb, port, proto, &res);
if (ret != EOK && ret != ENOENT) goto done;
if (ret == ENOENT) {
/* Doesn't exist in the DB. Nothing to do */
ret = EOK;
goto done;
}
}
/* There should only be one matching entry,
* but if there are multiple, we should delete
* them all to de-corrupt the DB.
*/
for (i = 0; i < res->count; i++) {
ret = sysdb_delete_entry(sysdb, res->msgs[i]->dn, false);
if (ret != EOK) goto done;
}
ret = sysdb_transaction_commit(sysdb);
in_transaction = false;
done:
if (in_transaction) {
sret = sysdb_transaction_cancel(sysdb);
if (sret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE,
("Could not cancel transaction\n"));
}
}
if (ret != EOK && ret != ENOENT) {
DEBUG(SSSDBG_TRACE_INTERNAL,
("Error: %d (%s)\n", ret, strerror(ret)));
}
talloc_zfree(tmp_ctx);
return ret;
}
errno_t
sysdb_enumservent(TALLOC_CTX *mem_ctx,
struct sysdb_ctx *sysdb,
struct ldb_result **_res)
{
errno_t ret;
int lret;
TALLOC_CTX *tmp_ctx;
static const char *attrs[] = SYSDB_SVC_ATTRS;
struct ldb_dn *base_dn;
struct ldb_result *res;
*_res = NULL;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) {
return ENOMEM;
}
base_dn = ldb_dn_new_fmt(tmp_ctx, sysdb->ldb,
SYSDB_TMPL_SVC_BASE,
sysdb->domain->name);
if (!base_dn) {
ret = ENOMEM;
goto done;
}
lret = ldb_search(sysdb->ldb, tmp_ctx, &res, base_dn,
LDB_SCOPE_SUBTREE, attrs,
SYSDB_SC);
if (lret != LDB_SUCCESS) {
ret = sysdb_error_to_errno(lret);
goto done;
}
if (res->count == 0) {
ret = ENOENT;
goto done;
}
*_res = talloc_steal(mem_ctx, res);
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
errno_t
sysdb_set_service_attr(struct sysdb_ctx *sysdb,
const char *name,
struct sysdb_attrs *attrs,
int mod_op)
{
errno_t ret;
struct ldb_dn *dn;
TALLOC_CTX *tmp_ctx;
tmp_ctx = talloc_new(NULL);
if (!tmp_ctx) {
return ENOMEM;
}
dn = sysdb_svc_dn(sysdb, tmp_ctx, sysdb->domain->name, name);
if (!dn) {
ret = ENOMEM;
goto done;
}
ret = sysdb_set_entry_attr(sysdb, dn, attrs, mod_op);
done:
talloc_free(tmp_ctx);
return ret;
}