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/*
Authors:
Fabiano Fidêncio <fidencio@redhat.com>
Copyright (C) 2017 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 "responder/common/cache_req/cache_req_domain.h"
struct cache_req_domain *
cache_req_domain_get_domain_by_name(struct cache_req_domain *domains,
const char *name)
{
struct cache_req_domain *dom;
struct cache_req_domain *ret = NULL;
DLIST_FOR_EACH(dom, domains) {
if (sss_domain_get_state(dom->domain) == DOM_DISABLED) {
continue;
}
if (strcasecmp(dom->domain->name, name) == 0 ||
(dom->domain->flat_name != NULL &&
strcasecmp(dom->domain->flat_name, name) == 0)) {
ret = dom;
break;
}
}
if (ret == NULL) {
DEBUG(SSSDBG_OP_FAILURE, "Unknown domains [%s].\n", name);
}
return ret;
}
void cache_req_domain_list_zfree(struct cache_req_domain **cr_domains)
{
struct cache_req_domain *p, *q, *r;
DLIST_FOR_EACH_SAFE(p, q, *cr_domains) {
r = p;
DLIST_REMOVE(*cr_domains, p);
talloc_zfree(r);
}
*cr_domains = NULL;
}
static bool
cache_req_domain_use_fqnames(struct sss_domain_info *domain,
bool enforce_non_fqnames)
{
struct sss_domain_info *head;
head = get_domains_head(domain);
/*
* In order to decide whether fully_qualified_names must be used on the
* lookups we have to take into consideration:
* - use_fully_qualified_name value of the head of the domains;
* (head->fqnames)
* - the presence of a domains' resolution order list;
* (non_fqnames_enforced)
*
* The relationship between those two can be described by:
* - head->fqnames:
* - true: in this case doesn't matter whether it's enforced or not,
* fully-qualified-names will _always_ be used
* - false: in this case (which is also the default case), the usage
* depends on it being enforced;
*
* - enforce_non_fqnames:
* - true: in this case, the usage of fully-qualified-names is not
* needed;
* - false: in this case, the usage of fully-qualified-names will be
* done accordingly to what's set for the domain itself.
*/
if (head->fqnames) {
return true;
} else if (enforce_non_fqnames) {
return false;
} else {
return domain->fqnames;
}
}
static struct cache_req_domain *
cache_req_domain_new_list_from_string_list(TALLOC_CTX *mem_ctx,
struct sss_domain_info *domains,
char **resolution_order)
{
struct cache_req_domain *cr_domains = NULL;
struct cache_req_domain *cr_domain;
struct sss_domain_info *dom;
char *name;
int flag = SSS_GND_ALL_DOMAINS;
int i;
bool enforce_non_fqnames = false;
errno_t ret;
/* Firstly, in case a domains' resolution order is passed ... iterate over
* the list adding its domains to the flatten cache req domains' list */
if (resolution_order != NULL) {
enforce_non_fqnames = true;
for (i = 0; resolution_order[i] != NULL; i++) {
name = resolution_order[i];
for (dom = domains; dom; dom = get_next_domain(dom, flag)) {
if (strcasecmp(name, dom->name) != 0) {
continue;
}
cr_domain = talloc_zero(mem_ctx, struct cache_req_domain);
if (cr_domain == NULL) {
ret = ENOMEM;
goto done;
}
cr_domain->domain = dom;
cr_domain->fqnames =
cache_req_domain_use_fqnames(dom, enforce_non_fqnames);
/* when using the domain resolution order, using shortnames as
* input is allowed by default. However, we really want to use
* the fully qualified name as output in order to avoid
* conflicts whith users who have the very same name. */
sss_domain_info_set_output_fqnames(cr_domain->domain, true);
DLIST_ADD_END(cr_domains, cr_domain,
struct cache_req_domain *);
break;
}
}
}
/* Then iterate through all the other domains (and subdomains) and add them
* to the flatten cache req domains' list */
for (dom = domains; dom; dom = get_next_domain(dom, flag)) {
if (string_in_list(dom->name, resolution_order, false)) {
continue;
}
cr_domain = talloc_zero(mem_ctx, struct cache_req_domain);
if (cr_domain == NULL) {
ret = ENOMEM;
goto done;
}
cr_domain->domain = dom;
cr_domain->fqnames =
cache_req_domain_use_fqnames(dom, enforce_non_fqnames);
/* when using the domain resolution order, using shortnames as input
* is allowed by default. However, we really want to use the fully
* qualified name as output in order to avoid conflicts whith users
* who have the very same name. */
if (resolution_order != NULL) {
sss_domain_info_set_output_fqnames(cr_domain->domain, true);
}
DLIST_ADD_END(cr_domains, cr_domain, struct cache_req_domain *);
}
ret = EOK;
done:
if (ret != EOK) {
cache_req_domain_list_zfree(&cr_domains);
}
return cr_domains;
}
errno_t
cache_req_domain_new_list_from_domain_resolution_order(
TALLOC_CTX *mem_ctx,
struct sss_domain_info *domains,
const char *domain_resolution_order,
struct cache_req_domain **_cr_domains)
{
TALLOC_CTX *tmp_ctx;
struct cache_req_domain *cr_domains;
char **list = NULL;
errno_t ret;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
return ENOMEM;
}
if (domain_resolution_order != NULL) {
if (strcmp(domain_resolution_order, ":") != 0) {
DEBUG(SSSDBG_TRACE_FUNC,
"Domain resolution order list (split by ':'): \"%s\"\n",
domain_resolution_order);
ret = split_on_separator(tmp_ctx, domain_resolution_order, ':',
true, true, &list, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_MINOR_FAILURE,
"split_on_separator() failed [%d]: [%s].\n",
ret, sss_strerror(ret));
goto done;
}
} else {
DEBUG(SSSDBG_TRACE_FUNC,
"Domain resolution order list: ':' "
"(do not use any specific order)\n");
}
} else {
DEBUG(SSSDBG_TRACE_FUNC,
"Domain resolution order list: not set\n");
}
cr_domains = cache_req_domain_new_list_from_string_list(mem_ctx, domains,
list);
if (cr_domains == NULL) {
ret = ENOMEM;
DEBUG(SSSDBG_OP_FAILURE,
"cache_req_domain_new_list_from_domain_resolution_order() "
"failed [%d]: [%s].\n",
ret, sss_strerror(ret));
goto done;
}
*_cr_domains = cr_domains;
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
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