-/***
- This file is part of systemd.
-
- Copyright 2008-2011 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
+/* SPDX-License-Identifier: LGPL-2.1+ */
#include <errno.h>
#include <net/if.h>
#include <netdb.h>
#include <nss.h>
#include <stdlib.h>
-#include <string.h>
#include "alloc-util.h"
+#include "errno-util.h"
#include "hostname-util.h"
#include "local-addresses.h"
#include "macro.h"
#include "nss-util.h"
#include "signal-util.h"
#include "string-util.h"
-#include "util.h"
/* We use 127.0.0.2 as IPv4 address. This has the advantage over
* 127.0.0.1 that it can be translated back to the local hostname. For
char *r_name;
unsigned n;
+ PROTECT_ERRNO;
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
assert(name);
} else if (is_gateway_hostname(name)) {
n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses);
- if (n_addresses <= 0) {
- *errnop = ENOENT;
- *h_errnop = HOST_NOT_FOUND;
- return NSS_STATUS_NOTFOUND;
- }
+ if (n_addresses <= 0)
+ goto not_found;
canonical = "_gateway";
} else {
hn = gethostname_malloc();
if (!hn) {
+ UNPROTECT_ERRNO;
*errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
return NSS_STATUS_TRYAGAIN;
}
- /* We respond to our local host name, our hostname suffixed with a single dot. */
- if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) {
- *errnop = ENOENT;
- *h_errnop = HOST_NOT_FOUND;
- return NSS_STATUS_NOTFOUND;
- }
+ /* We respond to our local hostname, our hostname suffixed with a single dot. */
+ if (!streq(name, hn) && !streq_ptr(startswith(name, hn), "."))
+ goto not_found;
n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses);
if (n_addresses < 0)
l = strlen(canonical);
ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2);
if (buflen < ms) {
+ UNPROTECT_ERRNO;
*errnop = ERANGE;
*h_errnop = NETDB_INTERNAL;
return NSS_STATUS_TRYAGAIN;
if (ttlp)
*ttlp = 0;
- /* Explicitly reset all error variables */
- *errnop = 0;
+ /* Explicitly reset both *h_errnop and h_errno to work around
+ * https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */
*h_errnop = NETDB_SUCCESS;
h_errno = 0;
return NSS_STATUS_SUCCESS;
+
+not_found:
+ *h_errnop = HOST_NOT_FOUND;
+ return NSS_STATUS_NOTFOUND;
}
static enum nss_status fill_in_hostent(
assert(errnop);
assert(h_errnop);
+ PROTECT_ERRNO;
+
alen = FAMILY_ADDRESS_SIZE(af);
for (a = addresses, n = 0, c = 0; n < n_addresses; a++, n++)
(c > 0 ? c+1 : 2) * sizeof(char*);
if (buflen < ms) {
+ UNPROTECT_ERRNO;
*errnop = ERANGE;
*h_errnop = NETDB_INTERNAL;
return NSS_STATUS_TRYAGAIN;
if (canonp)
*canonp = r_name;
- /* Explicitly reset all error variables */
- *errnop = 0;
+ /* Explicitly reset both *h_errnop and h_errno to work around
+ * https://bugzilla.redhat.com/show_bug.cgi?id=1125975 */
*h_errnop = NETDB_SUCCESS;
h_errno = 0;
uint32_t local_address_ipv4 = 0;
int n_addresses = 0;
+ PROTECT_ERRNO;
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
assert(name);
af = AF_INET;
if (!IN_SET(af, AF_INET, AF_INET6)) {
+ UNPROTECT_ERRNO;
*errnop = EAFNOSUPPORT;
*h_errnop = NO_DATA;
return NSS_STATUS_UNAVAIL;
} else if (is_gateway_hostname(name)) {
n_addresses = local_gateways(NULL, 0, af, &addresses);
- if (n_addresses <= 0) {
- *errnop = ENOENT;
- *h_errnop = HOST_NOT_FOUND;
- return NSS_STATUS_NOTFOUND;
- }
+ if (n_addresses <= 0)
+ goto not_found;
canonical = "_gateway";
} else {
hn = gethostname_malloc();
if (!hn) {
+ UNPROTECT_ERRNO;
*errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
return NSS_STATUS_TRYAGAIN;
}
- if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) {
- *errnop = ENOENT;
- *h_errnop = HOST_NOT_FOUND;
- return NSS_STATUS_NOTFOUND;
- }
+ if (!streq(name, hn) && !streq_ptr(startswith(name, hn), "."))
+ goto not_found;
n_addresses = local_addresses(NULL, 0, af, &addresses);
if (n_addresses < 0)
local_address_ipv4 = LOCALADDRESS_IPV4;
}
+ UNPROTECT_ERRNO;
+
return fill_in_hostent(
canonical, additional,
af,
errnop, h_errnop,
ttlp,
canonp);
+
+not_found:
+ *h_errnop = HOST_NOT_FOUND;
+ return NSS_STATUS_NOTFOUND;
}
enum nss_status _nss_myhostname_gethostbyaddr2_r(
bool additional_from_hostname = false;
unsigned n;
+ PROTECT_ERRNO;
BLOCK_SIGNALS(NSS_SIGNALS_BLOCK);
assert(addr);
assert(h_errnop);
if (!IN_SET(af, AF_INET, AF_INET6)) {
+ UNPROTECT_ERRNO;
*errnop = EAFNOSUPPORT;
*h_errnop = NO_DATA;
return NSS_STATUS_UNAVAIL;
}
if (len != FAMILY_ADDRESS_SIZE(af)) {
+ UNPROTECT_ERRNO;
*errnop = EINVAL;
*h_errnop = NO_RECOVERY;
return NSS_STATUS_UNAVAIL;
}
}
- *errnop = ENOENT;
*h_errnop = HOST_NOT_FOUND;
return NSS_STATUS_NOTFOUND;
if (!canonical || additional_from_hostname) {
hn = gethostname_malloc();
if (!hn) {
+ UNPROTECT_ERRNO;
*errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
return NSS_STATUS_TRYAGAIN;
additional = hn;
}
+ UNPROTECT_ERRNO;
return fill_in_hostent(
canonical, additional,
af,
projects / thirdparty / systemd.git / blobdiff