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/*
SSSD
Proxy netgroup handler
Authors:
Sumit Bose <sbose@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 "providers/proxy/proxy.h"
#include "util/util.h"
#define BUFLEN 1024
#define get_triple_el(s) ((s) ? (s) : "")
static errno_t make_netgroup_attr(struct __netgrent netgrent,
struct sysdb_attrs *attrs)
{
int ret;
char *dummy;
if (netgrent.type == group_val) {
ret =sysdb_attrs_add_string(attrs, SYSDB_NETGROUP_MEMBER,
netgrent.val.group);
if (ret != EOK) {
DEBUG(1, ("sysdb_attrs_add_string failed.\n"));
return ret;
}
} else if (netgrent.type == triple_val) {
dummy = talloc_asprintf(attrs, "(%s,%s,%s)",
get_triple_el(netgrent.val.triple.host),
get_triple_el(netgrent.val.triple.user),
get_triple_el(netgrent.val.triple.domain));
if (dummy == NULL) {
DEBUG(1, ("talloc_asprintf failed.\n"));
return ENOMEM;
}
ret = sysdb_attrs_add_string(attrs, SYSDB_NETGROUP_TRIPLE, dummy);
if (ret != EOK) {
DEBUG(1, ("sysdb_attrs_add_string failed.\n"));
return ret;
}
} else {
DEBUG(1, ("Unknown netgrent entry type [%d].\n", netgrent.type));
return EINVAL;
}
return EOK;
}
static errno_t save_netgroup(struct sysdb_ctx *sysdb,
struct sss_domain_info *domain,
const char *name,
struct sysdb_attrs *attrs,
bool lowercase,
uint64_t cache_timeout)
{
errno_t ret;
char *lower;
if (lowercase) {
lower = sss_tc_utf8_str_tolower(NULL, name);
if (!lower) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Cannot convert name to lowercase\n"));
return ENOMEM;
}
ret = sysdb_attrs_add_string(attrs, SYSDB_NAME_ALIAS, lower);
talloc_free(lower);
if (ret) {
DEBUG(SSSDBG_OP_FAILURE, ("Could not add name alias\n"));
return ret;
}
}
ret = sysdb_add_netgroup(sysdb, domain, name, NULL,
attrs, NULL, cache_timeout, 0);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("sysdb_add_netgroup failed.\n"));
return ret;
}
return EOK;
}
static errno_t handle_error(enum nss_status status, struct sysdb_ctx *sysdb,
struct sss_domain_info *domain, const char *name)
{
errno_t ret;
switch (status) {
case NSS_STATUS_SUCCESS:
DEBUG(SSSDBG_TRACE_INTERNAL, ("Netgroup lookup succeeded\n"));
ret = EOK;
break;
case NSS_STATUS_NOTFOUND:
DEBUG(SSSDBG_MINOR_FAILURE, ("The netgroup was not found\n"));
ret = sysdb_delete_netgroup(sysdb, domain, name);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Cannot delete netgroup: %d\n", ret));
ret = EIO;
}
break;
case NSS_STATUS_UNAVAIL:
DEBUG(SSSDBG_TRACE_LIBS,
("The proxy target did not respond, going offline\n"));
ret = ENXIO;
break;
default:
DEBUG(SSSDBG_CRIT_FAILURE, ("Unexpected error looking up netgroup\n"));
ret = EIO;
break;
}
return ret;
}
errno_t get_netgroup(struct proxy_id_ctx *ctx,
struct sysdb_ctx *sysdb,
struct sss_domain_info *dom,
const char *name)
{
struct __netgrent result;
enum nss_status status;
char buffer[BUFLEN];
int ret;
TALLOC_CTX *tmp_ctx = NULL;
struct sysdb_attrs *attrs;
memset(&result, 0, sizeof(result));
status = ctx->ops.setnetgrent(name, &result);
if (status != NSS_STATUS_SUCCESS) {
DEBUG(SSSDBG_OP_FAILURE,
("setnetgrent failed for netgroup [%s].\n", name));
ret = handle_error(status, sysdb, dom, name);
goto done;
}
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_new failed.\n"));
ret = ENOMEM;
goto done;
}
attrs = sysdb_new_attrs(tmp_ctx);
if (attrs == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("sysdb_new_attrs failed.\n"));
ret = ENOMEM;
goto done;
}
do {
status = ctx->ops.getnetgrent_r(&result, buffer, BUFLEN, &ret);
if (status != NSS_STATUS_SUCCESS &&
status != NSS_STATUS_RETURN &&
status != NSS_STATUS_NOTFOUND) {
ret = handle_error(status, sysdb, dom, name);
DEBUG(SSSDBG_OP_FAILURE,
("getnetgrent_r failed for netgroup [%s]: [%d][%s].\n",
name, ret, strerror(ret)));
goto done;
}
if (status == NSS_STATUS_SUCCESS) {
ret = make_netgroup_attr(result, attrs);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, ("make_netgroup_attr failed.\n"));
goto done;
}
}
} while (status != NSS_STATUS_RETURN && status != NSS_STATUS_NOTFOUND);
status = ctx->ops.endnetgrent(&result);
if (status != NSS_STATUS_SUCCESS) {
DEBUG(SSSDBG_OP_FAILURE, ("endnetgrent failed.\n"));
ret = handle_error(status, sysdb, dom, name);
goto done;
}
ret = save_netgroup(sysdb, dom, name, attrs,
!dom->case_sensitive,
dom->netgroup_timeout);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE, ("sysdb_add_netgroup failed.\n"));
goto done;
}
ret = EOK;
done:
talloc_free(tmp_ctx);
return ret;
}
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