X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fnss-myhostname%2Fnss-myhostname.c;h=fed76c62e72f1ce2e915c556e4ff60991d9782bd;hb=dc75168823540076b354135f6e2de7a9a978fbca;hp=2f768603b00d2d6ea26ad6b4add2d72ce1f9cffa;hpb=df17ddee0853482bfaefc36b9bd3424a64621915;p=elogind.git
diff --git a/src/nss-myhostname/nss-myhostname.c b/src/nss-myhostname/nss-myhostname.c
index 2f768603b..fed76c62e 100644
--- a/src/nss-myhostname/nss-myhostname.c
+++ b/src/nss-myhostname/nss-myhostname.c
@@ -19,16 +19,12 @@
along with systemd; If not, see .
***/
-#include
#include
-#include
#include
#include
#include
-#include
#include
#include
-#include
#include "local-addresses.h"
#include "macro.h"
@@ -38,7 +34,7 @@
/* 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
* IPv6 we use ::1 which unfortunately will not translate back to the
- * hostname but instead something like "localhost6" or so. */
+ * hostname but instead something like "localhost" or so. */
#define LOCALADDRESS_IPV4 (htonl(0x7F000002))
#define LOCALADDRESS_IPV6 &in6addr_loopback
@@ -47,6 +43,13 @@
NSS_GETHOSTBYNAME_PROTOTYPES(myhostname);
NSS_GETHOSTBYADDR_PROTOTYPES(myhostname);
+static bool is_gateway(const char *hostname) {
+ assert(hostname);
+
+ return streq(hostname, "gateway") ||
+ streq(hostname, "gateway.");
+}
+
enum nss_status _nss_myhostname_gethostbyname4_r(
const char *name,
struct gaih_addrtuple **pat,
@@ -78,7 +81,7 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
- } else if (streq(name, "gateway") || streq(name, "gateway.")) {
+ } else if (is_gateway(name)) {
n_addresses = local_gateways(NULL, 0, AF_UNSPEC, &addresses);
if (n_addresses <= 0) {
@@ -348,7 +351,7 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
- } else if (streq(name, "gateway") || streq(name, "gateway.")) {
+ } else if (is_gateway(name)) {
n_addresses = local_gateways(NULL, 0, af, &addresses);
if (n_addresses <= 0) {
@@ -408,6 +411,7 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
_cleanup_free_ char *hn = NULL;
int n_addresses = 0;
struct local_address *a;
+ bool additional_from_hostname = false;
unsigned n;
assert(addr);
@@ -429,7 +433,6 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
}
if (af == AF_INET) {
-
if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4)
goto found;
@@ -443,10 +446,10 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
assert(af == AF_INET6);
if (memcmp(addr, LOCALADDRESS_IPV6, 16) == 0) {
- additional = "localhost";
+ canonical = "localhost";
+ additional_from_hostname = true;
goto found;
}
-
}
n_addresses = local_addresses(NULL, 0, AF_UNSPEC, &addresses);
@@ -455,18 +458,8 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
if (af != a->family)
continue;
- if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) {
-
- hn = gethostname_malloc();
- if (!hn) {
- *errnop = ENOMEM;
- *h_errnop = NO_RECOVERY;
- return NSS_STATUS_TRYAGAIN;
- }
-
- canonical = hn;
+ if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0)
goto found;
- }
}
}
@@ -480,7 +473,6 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
continue;
if (memcmp(addr, &a->address, FAMILY_ADDRESS_SIZE(af)) == 0) {
-
canonical = "gateway";
goto found;
}
@@ -493,6 +485,20 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
return NSS_STATUS_NOTFOUND;
found:
+ if (!canonical || (!additional && additional_from_hostname)) {
+ hn = gethostname_malloc();
+ if (!hn) {
+ *errnop = ENOMEM;
+ *h_errnop = NO_RECOVERY;
+ return NSS_STATUS_TRYAGAIN;
+ }
+
+ if (!canonical)
+ canonical = hn;
+
+ if (!additional && additional_from_hostname)
+ additional = hn;
+ }
return fill_in_hostent(
canonical, additional,
@@ -504,7 +510,6 @@ found:
errnop, h_errnop,
ttlp,
NULL);
-
}
NSS_GETHOSTBYNAME_FALLBACKS(myhostname);