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-rw-r--r--src/nss-myhostname/ifconf.h32
-rw-r--r--src/nss-myhostname/netlink.c92
-rw-r--r--src/nss-myhostname/nss-myhostname.c110
3 files changed, 117 insertions, 117 deletions
diff --git a/src/nss-myhostname/ifconf.h b/src/nss-myhostname/ifconf.h
index cd598d2b43..92f03b261a 100644
--- a/src/nss-myhostname/ifconf.h
+++ b/src/nss-myhostname/ifconf.h
@@ -26,43 +26,19 @@
#include <assert.h>
#include <sys/socket.h>
+#include "socket-util.h"
+
struct address {
unsigned char family;
- uint8_t address[16];
+ union in_addr_union address;
unsigned char scope;
int ifindex;
};
-#define _public_ __attribute__ ((visibility("default")))
-#define _hidden_ __attribute__ ((visibility("hidden")))
-
-int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) _hidden_;
-
static inline size_t PROTO_ADDRESS_SIZE(int proto) {
assert(proto == AF_INET || proto == AF_INET6);
return proto == AF_INET6 ? 16 : 4;
}
-static inline int address_compare(const void *_a, const void *_b) {
- const struct address *a = _a, *b = _b;
-
- /* Order lowest scope first, IPv4 before IPv6, lowest interface index first */
-
- if (a->scope < b->scope)
- return -1;
- if (a->scope > b->scope)
- return 1;
-
- if (a->family == AF_INET && b->family == AF_INET6)
- return -1;
- if (a->family == AF_INET6 && b->family == AF_INET)
- return 1;
-
- if (a->ifindex < b->ifindex)
- return -1;
- if (a->ifindex > b->ifindex)
- return 1;
-
- return 0;
-}
+int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list);
diff --git a/src/nss-myhostname/netlink.c b/src/nss-myhostname/netlink.c
index b4a464c06a..e9518e3213 100644
--- a/src/nss-myhostname/netlink.c
+++ b/src/nss-myhostname/netlink.c
@@ -23,16 +23,37 @@
#include "sd-rtnl.h"
#include "rtnl-util.h"
#include "macro.h"
-
#include "ifconf.h"
+static int address_compare(const void *_a, const void *_b) {
+ const struct address *a = _a, *b = _b;
+
+ /* Order lowest scope first, IPv4 before IPv6, lowest interface index first */
+
+ if (a->scope < b->scope)
+ return -1;
+ if (a->scope > b->scope)
+ return 1;
+
+ if (a->family == AF_INET && b->family == AF_INET6)
+ return -1;
+ if (a->family == AF_INET6 && b->family == AF_INET)
+ return 1;
+
+ if (a->ifindex < b->ifindex)
+ return -1;
+ if (a->ifindex > b->ifindex)
+ return 1;
+
+ return 0;
+}
+
int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) {
- _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
- sd_rtnl_message *m;
+ _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
_cleanup_free_ struct address *list = NULL;
- struct address *new_list = NULL;
- unsigned n_list = 0;
+ size_t n_list = 0, n_allocated = 0;
+ sd_rtnl_message *m;
int r;
r = sd_rtnl_open(&rtnl, 0);
@@ -46,18 +67,11 @@ int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) {
r = sd_rtnl_call(rtnl, req, 0, &reply);
if (r < 0)
return r;
- m = reply;
- do {
- uint16_t type;
- unsigned char scope;
+ for (m = reply; m; m = sd_rtnl_message_next(m)) {
+ struct address *a;
unsigned char flags;
- unsigned char family;
- int ifindex;
- union {
- struct in_addr in;
- struct in6_addr in6;
- } address;
+ uint16_t type;
r = sd_rtnl_message_get_errno(m);
if (r < 0)
@@ -70,72 +84,66 @@ int ifconf_acquire_addresses(struct address **_list, unsigned *_n_list) {
if (type != RTM_NEWADDR)
continue;
- r = sd_rtnl_message_addr_get_scope(m, &scope);
+ r = sd_rtnl_message_addr_get_flags(m, &flags);
if (r < 0)
return r;
- if (scope == RT_SCOPE_HOST || scope == RT_SCOPE_NOWHERE)
+ if (flags & IFA_F_DEPRECATED)
continue;
- r = sd_rtnl_message_addr_get_flags(m, &flags);
+ if (!GREEDY_REALLOC(list, n_allocated, n_list+1))
+ return -ENOMEM;
+
+ a = list + n_list;
+
+ r = sd_rtnl_message_addr_get_scope(m, &a->scope);
if (r < 0)
return r;
- if (flags & IFA_F_DEPRECATED)
+ if (a->scope == RT_SCOPE_HOST || a->scope == RT_SCOPE_NOWHERE)
continue;
- r = sd_rtnl_message_addr_get_family(m, &family);
+ r = sd_rtnl_message_addr_get_family(m, &a->family);
if (r < 0)
return r;
- switch (family) {
+ switch (a->family) {
+
case AF_INET:
- r = sd_rtnl_message_read_in_addr(m, IFA_LOCAL, &address.in);
+ r = sd_rtnl_message_read_in_addr(m, IFA_LOCAL, &a->address.in);
if (r < 0) {
- r = sd_rtnl_message_read_in_addr(m, IFA_ADDRESS, &address.in);
+ r = sd_rtnl_message_read_in_addr(m, IFA_ADDRESS, &a->address.in);
if (r < 0)
continue;
}
break;
+
case AF_INET6:
- r = sd_rtnl_message_read_in6_addr(m, IFA_LOCAL, &address.in6);
+ r = sd_rtnl_message_read_in6_addr(m, IFA_LOCAL, &a->address.in6);
if (r < 0) {
- r = sd_rtnl_message_read_in6_addr(m, IFA_ADDRESS, &address.in6);
+ r = sd_rtnl_message_read_in6_addr(m, IFA_ADDRESS, &a->address.in6);
if (r < 0)
continue;
}
break;
+
default:
continue;
}
- r = sd_rtnl_message_addr_get_ifindex(m, &ifindex);
+ r = sd_rtnl_message_addr_get_ifindex(m, &a->ifindex);
if (r < 0)
return r;
- new_list = realloc(list, (n_list+1) * sizeof(struct address));
- if (!new_list)
- return -ENOMEM;
- else
- list = new_list;
-
- assert_cc(sizeof(address) <= 16);
-
- list[n_list].family = family;
- list[n_list].scope = scope;
- memcpy(list[n_list].address, &address, sizeof(address));
- list[n_list].ifindex = ifindex;
-
n_list++;
-
- } while ((m = sd_rtnl_message_next(m)));
+ };
if (n_list)
qsort(list, n_list, sizeof(struct address), address_compare);
- *_n_list = n_list;
*_list = list;
list = NULL;
+ *_n_list = n_list;
return 0;
}
diff --git a/src/nss-myhostname/nss-myhostname.c b/src/nss-myhostname/nss-myhostname.c
index 60e256d54f..9320e69ebd 100644
--- a/src/nss-myhostname/nss-myhostname.c
+++ b/src/nss-myhostname/nss-myhostname.c
@@ -98,32 +98,39 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
int *errnop, int *h_errnop,
int32_t *ttlp) {
- unsigned lo_ifi;
- char hn[HOST_NAME_MAX+1] = {};
- const char *canonical = NULL;
- size_t l, idx, ms;
- char *r_name;
struct gaih_addrtuple *r_tuple, *r_tuple_prev = NULL;
- struct address *addresses = NULL, *a;
+ _cleanup_free_ struct address *addresses = NULL;
+ _cleanup_free_ char *hn = NULL;
+ const char *canonical = NULL;
unsigned n_addresses = 0, n;
uint32_t local_address_ipv4;
+ struct address *a;
+ size_t l, idx, ms;
+ char *r_name;
+ int lo_ifi;
- if (strcasecmp(name, "localhost") == 0) {
+ assert(name);
+ assert(pat);
+ assert(buffer);
+ assert(errnop);
+ assert(h_errnop);
+
+ if (is_localhost(name)) {
/* We respond to 'localhost', so that /etc/hosts
* is optional */
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
} else {
- /* We respond to our local host name */
-
- if (gethostname(hn, sizeof(hn)-1) < 0) {
- *errnop = errno;
+ hn = gethostname_malloc();
+ if (!hn) {
+ *errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
- return NSS_STATUS_UNAVAIL;
+ return NSS_STATUS_TRYAGAIN;
}
- if (strcasecmp(name, hn) != 0) {
+ /* We respond to our local host name, our 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;
@@ -140,11 +147,10 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
lo_ifi = n_addresses <= 0 ? if_nametoindex(LOOPBACK_INTERFACE) : 0;
l = strlen(canonical);
- ms = ALIGN(l+1)+ALIGN(sizeof(struct gaih_addrtuple))*(n_addresses > 0 ? n_addresses : 2);
+ ms = ALIGN(l+1) + ALIGN(sizeof(struct gaih_addrtuple)) * (n_addresses > 0 ? n_addresses : 2);
if (buflen < ms) {
*errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
- free(addresses);
return NSS_STATUS_TRYAGAIN;
}
@@ -184,7 +190,7 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
r_tuple->name = r_name;
r_tuple->family = a->family;
r_tuple->scopeid = a->ifindex;
- memcpy(r_tuple->addr, a->address, 16);
+ memcpy(r_tuple->addr, &a->address, 16);
idx += ALIGN(sizeof(struct gaih_addrtuple));
r_tuple_prev = r_tuple;
@@ -202,8 +208,6 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
if (ttlp)
*ttlp = 0;
- free(addresses);
-
return NSS_STATUS_SUCCESS;
}
@@ -224,6 +228,12 @@ static enum nss_status fill_in_hostent(
struct address *a;
unsigned n, c;
+ assert(canonical);
+ assert(result);
+ assert(buffer);
+ assert(errnop);
+ assert(h_errnop);
+
alen = PROTO_ADDRESS_SIZE(af);
for (a = addresses, n = 0, c = 0; n < n_addresses; a++, n++)
@@ -234,15 +244,14 @@ static enum nss_status fill_in_hostent(
l_additional = additional ? strlen(additional) : 0;
ms = ALIGN(l_canonical+1)+
(additional ? ALIGN(l_additional+1) : 0) +
- sizeof(char*)+
+ sizeof(char*) +
(additional ? sizeof(char*) : 0) +
- (c > 0 ? c : 1)*ALIGN(alen)+
- (c > 0 ? c+1 : 2)*sizeof(char*);
+ (c > 0 ? c : 1) * ALIGN(alen)+
+ (c > 0 ? c+1 : 2) * sizeof(char*);
if (buflen < ms) {
*errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
- free(addresses);
return NSS_STATUS_TRYAGAIN;
}
@@ -277,7 +286,7 @@ static enum nss_status fill_in_hostent(
if (af != a->family)
continue;
- memcpy(r_addr + i*ALIGN(alen), a->address, alen);
+ memcpy(r_addr + i*ALIGN(alen), &a->address, alen);
i++;
}
@@ -330,8 +339,6 @@ static enum nss_status fill_in_hostent(
if (canonp)
*canonp = r_name;
- free(addresses);
-
return NSS_STATUS_SUCCESS;
}
@@ -344,11 +351,17 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
int32_t *ttlp,
char **canonp) {
- char hn[HOST_NAME_MAX+1] = {};
- struct address *addresses = NULL;
- unsigned n_addresses = 0;
+ _cleanup_free_ struct address *addresses = NULL;
const char *canonical, *additional = NULL;
+ _cleanup_free_ char *hn = NULL;
uint32_t local_address_ipv4;
+ unsigned n_addresses = 0;
+
+ assert(name);
+ assert(host);
+ assert(buffer);
+ assert(errnop);
+ assert(h_errnop);
if (af == AF_UNSPEC)
af = AF_INET;
@@ -359,17 +372,18 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
return NSS_STATUS_UNAVAIL;
}
- if (strcasecmp(name, "localhost") == 0) {
+ if (is_localhost(name)) {
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
} else {
- if (gethostname(hn, sizeof(hn)-1) < 0) {
- *errnop = errno;
+ hn = gethostname_malloc();
+ if (!hn) {
+ *errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
- return NSS_STATUS_UNAVAIL;
+ return NSS_STATUS_TRYAGAIN;
}
- if (strcasecmp(name, hn) != 0) {
+ if (!streq(name, hn) && !streq_ptr(startswith(name, hn), ".")) {
*errnop = ENOENT;
*h_errnop = HOST_NOT_FOUND;
return NSS_STATUS_NOTFOUND;
@@ -435,12 +449,18 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
int *errnop, int *h_errnop,
int32_t *ttlp) {
- char hn[HOST_NAME_MAX+1] = {};
- struct address *addresses = NULL;
- struct address *a;
- unsigned n_addresses = 0, n;
- uint32_t local_address_ipv4 = LOCALADDRESS_IPV4;
const char *canonical = NULL, *additional = NULL;
+ uint32_t local_address_ipv4 = LOCALADDRESS_IPV4;
+ _cleanup_free_ struct address *addresses = NULL;
+ _cleanup_free_ char *hn = NULL;
+ unsigned n_addresses = 0, n;
+ struct address *a;
+
+ assert(addr);
+ assert(host);
+ assert(buffer);
+ assert(errnop);
+ assert(h_errnop);
if (len != PROTO_ADDRESS_SIZE(af)) {
*errnop = EINVAL;
@@ -478,26 +498,22 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
if (af != a->family)
continue;
- if (memcmp(addr, a->address, PROTO_ADDRESS_SIZE(af)) == 0)
+ if (memcmp(addr, &a->address, PROTO_ADDRESS_SIZE(af)) == 0)
goto found;
}
*errnop = ENOENT;
*h_errnop = HOST_NOT_FOUND;
- free(addresses);
-
return NSS_STATUS_NOTFOUND;
found:
if (!canonical) {
- if (gethostname(hn, sizeof(hn)-1) < 0) {
- *errnop = errno;
+ hn = gethostname_malloc();
+ if (!hn) {
+ *errnop = ENOMEM;
*h_errnop = NO_RECOVERY;
-
- free(addresses);
-
- return NSS_STATUS_UNAVAIL;
+ return NSS_STATUS_TRYAGAIN;
}
canonical = hn;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-15 22:00:34 +0000