[SCM] NSS Wrapper Repository - branch master updated
Andreas Schneider
asn at samba.org
Mon Nov 18 12:19:52 UTC 2019
The branch, master has been updated
via 79b4874 nwrap: Use size_t for iterations, can't be negative
via 19b9b95 nwrap: Try different backends for gethostbyname[2][_r]
via 6b81c15 nwrap: Try different backends in gethostbyaddr
from 9d72b6e pkgconfig: Fix path to library in nss_wrapper.pc
https://git.samba.org/?p=nss_wrapper.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit 79b48745f55cc4947b437f0f1912cbad51eade63
Author: Samuel Cabrero <scabrero at suse.de>
Date: Mon Nov 11 18:31:17 2019 +0100
nwrap: Use size_t for iterations, can't be negative
Signed-off-by: Samuel Cabrero <scabrero at suse.de>
Reviewed-by: Andreas Schneider <asn at samba.org>
commit 19b9b95f1e91359c3e43e3136b4ba8b284807252
Author: Samuel Cabrero <scabrero at suse.de>
Date: Thu Oct 10 18:12:08 2019 +0200
nwrap: Try different backends for gethostbyname[2][_r]
Signed-off-by: Samuel Cabrero <scabrero at suse.de>
Reviewed-by: Andreas Schneider <asn at samba.org>
commit 6b81c152eae18b8cf9f4a80fb33b31ddf3af0a7f
Author: Samuel Cabrero <scabrero at suse.de>
Date: Thu Oct 10 13:47:06 2019 +0200
nwrap: Try different backends in gethostbyaddr
Signed-off-by: Samuel Cabrero <scabrero at suse.de>
Reviewed-by: Andreas Schneider <asn at samba.org>
-----------------------------------------------------------------------
Summary of changes:
src/nss_wrapper.c | 457 ++++++++++++++++++++++++++++++++++++++++++++++++------
1 file changed, 412 insertions(+), 45 deletions(-)
Changeset truncated at 500 lines:
diff --git a/src/nss_wrapper.c b/src/nss_wrapper.c
index 1bcd3b1..ff41eeb 100644
--- a/src/nss_wrapper.c
+++ b/src/nss_wrapper.c
@@ -395,6 +395,14 @@ struct nwrap_module_nss_fns {
NSS_STATUS (*_nss_getgrent_r)(struct group *result, char *buffer,
size_t buflen, int *errnop);
NSS_STATUS (*_nss_endgrent)(void);
+ NSS_STATUS (*_nss_gethostbyaddr_r)(const void *addr, socklen_t addrlen,
+ int af, struct hostent *result,
+ char *buffer, size_t buflen,
+ int *errnop, int *h_errnop);
+ NSS_STATUS (*_nss_gethostbyname2_r)(const char *name, int af,
+ struct hostent *result,
+ char *buffer, size_t buflen,
+ int *errnop, int *h_errnop);
};
struct nwrap_backend {
@@ -405,6 +413,8 @@ struct nwrap_backend {
struct nwrap_module_nss_fns *fns;
};
+struct nwrap_vector;
+
struct nwrap_ops {
struct passwd * (*nw_getpwnam)(struct nwrap_backend *b,
const char *name);
@@ -440,6 +450,18 @@ struct nwrap_ops {
struct group *grdst, char *buf,
size_t buflen, struct group **grdstp);
void (*nw_endgrent)(struct nwrap_backend *b);
+ struct hostent *(*nw_gethostbyaddr)(struct nwrap_backend *b,
+ const void *addr,
+ socklen_t len, int type);
+ struct hostent *(*nw_gethostbyname)(struct nwrap_backend *b,
+ const char *name);
+ struct hostent *(*nw_gethostbyname2)(struct nwrap_backend *b,
+ const char *name, int af);
+ int (*nw_gethostbyname2_r)(struct nwrap_backend *b,
+ const char *name, int af,
+ struct hostent *hedst,
+ char *buf, size_t buflen,
+ struct hostent **hedstp);
};
/* Public prototypes */
@@ -485,6 +507,18 @@ static int nwrap_files_getgrent_r(struct nwrap_backend *b,
struct group *grdst, char *buf,
size_t buflen, struct group **grdstp);
static void nwrap_files_endgrent(struct nwrap_backend *b);
+static struct hostent *nwrap_files_gethostbyaddr(struct nwrap_backend *b,
+ const void *addr,
+ socklen_t len, int type);
+static struct hostent *nwrap_files_gethostbyname(struct nwrap_backend *b,
+ const char *name);
+static struct hostent *nwrap_files_gethostbyname2(struct nwrap_backend *b,
+ const char *name, int af);
+static int nwrap_files_gethostbyname2_r(struct nwrap_backend *b,
+ const char *name, int af,
+ struct hostent *hedst,
+ char *buf, size_t buflen,
+ struct hostent **hedstp);
/* prototypes for module backend */
@@ -522,6 +556,18 @@ static void nwrap_module_setgrent(struct nwrap_backend *b);
static void nwrap_module_endgrent(struct nwrap_backend *b);
static int nwrap_module_initgroups(struct nwrap_backend *b,
const char *user, gid_t group);
+static struct hostent *nwrap_module_gethostbyaddr(struct nwrap_backend *b,
+ const void *addr,
+ socklen_t len, int type);
+static struct hostent *nwrap_module_gethostbyname(struct nwrap_backend *b,
+ const char *name);
+static struct hostent *nwrap_module_gethostbyname2(struct nwrap_backend *b,
+ const char *name, int af);
+static int nwrap_module_gethostbyname2_r(struct nwrap_backend *b,
+ const char *name, int af,
+ struct hostent *hedst,
+ char *buf, size_t buflen,
+ struct hostent **hedstp);
struct nwrap_ops nwrap_files_ops = {
.nw_getpwnam = nwrap_files_getpwnam,
@@ -541,6 +587,10 @@ struct nwrap_ops nwrap_files_ops = {
.nw_getgrent = nwrap_files_getgrent,
.nw_getgrent_r = nwrap_files_getgrent_r,
.nw_endgrent = nwrap_files_endgrent,
+ .nw_gethostbyaddr = nwrap_files_gethostbyaddr,
+ .nw_gethostbyname = nwrap_files_gethostbyname,
+ .nw_gethostbyname2 = nwrap_files_gethostbyname2,
+ .nw_gethostbyname2_r = nwrap_files_gethostbyname2_r,
};
struct nwrap_ops nwrap_module_ops = {
@@ -561,6 +611,10 @@ struct nwrap_ops nwrap_module_ops = {
.nw_getgrent = nwrap_module_getgrent,
.nw_getgrent_r = nwrap_module_getgrent_r,
.nw_endgrent = nwrap_module_endgrent,
+ .nw_gethostbyaddr = nwrap_module_gethostbyaddr,
+ .nw_gethostbyname = nwrap_module_gethostbyname,
+ .nw_gethostbyname2 = nwrap_module_gethostbyname2,
+ .nw_gethostbyname2_r = nwrap_module_gethostbyname2_r,
};
struct nwrap_libc {
@@ -571,7 +625,7 @@ struct nwrap_libc {
};
struct nwrap_main {
- int num_backends;
+ size_t num_backends;
struct nwrap_backend *backends;
struct nwrap_libc *libc;
};
@@ -1475,6 +1529,10 @@ static struct nwrap_module_nss_fns *nwrap_load_module_fns(struct nwrap_backend *
nwrap_load_module_fn(b, "getgrent_r");
*(void **)(&fns->_nss_endgrent) =
nwrap_load_module_fn(b, "endgrent");
+ *(void **)(&fns->_nss_gethostbyaddr_r) =
+ nwrap_load_module_fn(b, "gethostbyaddr_r");
+ *(void **)(&fns->_nss_gethostbyname2_r) =
+ nwrap_load_module_fn(b, "gethostbyname2_r");
return fns;
}
@@ -1501,7 +1559,7 @@ static void *nwrap_load_module(const char *so_path)
static bool nwrap_module_init(const char *name,
struct nwrap_ops *ops,
const char *so_path,
- int *num_backends,
+ size_t *num_backends,
struct nwrap_backend **backends)
{
struct nwrap_backend *b;
@@ -3513,9 +3571,9 @@ static void nwrap_files_endgrent(struct nwrap_backend *b)
}
/* hosts functions */
-static int nwrap_files_gethostbyname(const char *name, int af,
- struct hostent *result,
- struct nwrap_vector *addr_list)
+static int nwrap_files_internal_gethostbyname(const char *name, int af,
+ struct hostent *result,
+ struct nwrap_vector *addr_list)
{
struct nwrap_entlist *el;
struct hostent *he;
@@ -3611,11 +3669,11 @@ no_ent:
return -1;
}
-#ifdef HAVE_GETHOSTBYNAME_R
-static int nwrap_gethostbyname_r(const char *name,
- struct hostent *ret,
- char *buf, size_t buflen,
- struct hostent **result, int *h_errnop)
+static int nwrap_files_gethostbyname2_r(struct nwrap_backend *b,
+ const char *name, int af,
+ struct hostent *hedst,
+ char *buf, size_t buflen,
+ struct hostent **hedstp)
{
struct nwrap_vector *addr_list = malloc(sizeof(struct nwrap_vector));
union {
@@ -3624,6 +3682,9 @@ static int nwrap_gethostbyname_r(const char *name,
} g;
int rc;
+ (void) b; /* unused */
+ (void) af; /* unused */
+
if (addr_list == NULL) {
NWRAP_LOG(NWRAP_LOG_ERROR,
"Unable to allocate memory for address list");
@@ -3633,9 +3694,9 @@ static int nwrap_gethostbyname_r(const char *name,
ZERO_STRUCTP(addr_list);
- rc = nwrap_files_gethostbyname(name, AF_UNSPEC, ret, addr_list);
+ rc = nwrap_files_internal_gethostbyname(name, AF_UNSPEC, hedst,
+ addr_list);
if (rc == -1) {
- *h_errnop = h_errno;
if (addr_list->items != NULL) {
free(addr_list->items);
}
@@ -3659,11 +3720,32 @@ static int nwrap_gethostbyname_r(const char *name,
free(addr_list);
g.ptr = buf;
- ret->h_addr_list = g.list;
- *result = ret;
+ hedst->h_addr_list = g.list;
+ *hedstp = hedst;
return 0;
}
+#ifdef HAVE_GETHOSTBYNAME_R
+static int nwrap_gethostbyname_r(const char *name,
+ struct hostent *ret,
+ char *buf, size_t buflen,
+ struct hostent **result, int *h_errnop)
+{
+ int rc;
+ size_t i;
+
+ for (i=0; i < nwrap_main_global->num_backends; i++) {
+ struct nwrap_backend *b = &nwrap_main_global->backends[i];
+ rc = b->ops->nw_gethostbyname2_r(b, name, AF_UNSPEC, ret,
+ buf, buflen, result);
+ if (rc == 0) {
+ return 0;
+ }
+ }
+ *h_errnop = h_errno;
+ return ENOENT;
+}
+
int gethostbyname_r(const char *name,
struct hostent *ret,
char *buf, size_t buflen,
@@ -3682,6 +3764,42 @@ int gethostbyname_r(const char *name,
}
#endif
+#ifdef HAVE_GETHOSTBYNAME2_R
+static int nwrap_gethostbyname2_r(const char *name, int af,
+ struct hostent *ret,
+ char *buf, size_t buflen,
+ struct hostent **result, int *h_errnop)
+{
+ int rc;
+ size_t i;
+
+ for (i=0; i < nwrap_main_global->num_backends; i++) {
+ struct nwrap_backend *b = &nwrap_main_global->backends[i];
+ rc = b->ops->nw_gethostbyname2_r(b, name, af, ret,
+ buf, buflen, result);
+ if (rc == 0) {
+ return 0;
+ }
+ }
+ *h_errnop = h_errno;
+ return ENOENT;
+}
+
+int gethostbyname2_r(const char *name, int af,
+ struct hostent *ret,
+ char *buf, size_t buflen,
+ struct hostent **result, int *h_errnop)
+{
+ if (!nss_wrapper_hosts_enabled()) {
+ return libc_gethostbyname2_r(name, af, ret, buf, buflen,
+ result, h_errnop);
+ }
+
+ return nwrap_gethostbyname2_r(name, af, ret, buf, buflen, result,
+ h_errnop);
+}
+#endif
+
static int nwrap_files_getaddrinfo(const char *name,
unsigned short port,
const struct addrinfo *hints,
@@ -3785,7 +3903,8 @@ static int nwrap_files_getaddrinfo(const char *name,
return rc;
}
-static struct hostent *nwrap_files_gethostbyaddr(const void *addr,
+static struct hostent *nwrap_files_gethostbyaddr(struct nwrap_backend *b,
+ const void *addr,
socklen_t len, int type)
{
struct hostent *he;
@@ -3795,6 +3914,7 @@ static struct hostent *nwrap_files_gethostbyaddr(const void *addr,
size_t i;
bool ok;
+ (void) b; /* unused */
(void) len; /* unused */
ok = nwrap_files_cache_reload(nwrap_he_global.cache);
@@ -3831,15 +3951,23 @@ static int nwrap_gethostbyaddr_r(const void *addr, socklen_t len, int type,
char *buf, size_t buflen,
struct hostent **result, int *h_errnop)
{
- *result = nwrap_files_gethostbyaddr(addr, len, type);
+ size_t i;
+ for (i=0; i < nwrap_main_global->num_backends; i++) {
+ struct nwrap_backend *b = &nwrap_main_global->backends[i];
+ *result = b->ops->nw_gethostbyaddr(b, addr, len, type);
+ if (*result != NULL) {
+ break;
+ }
+ }
+
if (*result != NULL) {
memset(buf, '\0', buflen);
*ret = **result;
return 0;
- } else {
- *h_errnop = h_errno;
- return -1;
}
+
+ *h_errnop = h_errno;
+ return -1;
}
int gethostbyaddr_r(const void *addr, socklen_t len, int type,
@@ -4336,13 +4464,177 @@ static void nwrap_module_endgrent(struct nwrap_backend *b)
b->fns->_nss_endgrent();
}
+static struct hostent *nwrap_module_gethostbyaddr(struct nwrap_backend *b,
+ const void *addr,
+ socklen_t len, int type)
+{
+ static struct hostent he;
+ static char *buf = NULL;
+ static size_t buflen = 1000;
+ NSS_STATUS status;
+
+ if (b->fns->_nss_gethostbyaddr_r == NULL) {
+ return NULL;
+ }
+
+ if (buf == NULL) {
+ buf = (char *)malloc(buflen);
+ if (buf == NULL) {
+ return NULL;
+ }
+ }
+again:
+ status = b->fns->_nss_gethostbyaddr_r(addr, len, type, &he,
+ buf, buflen, &errno, &h_errno);
+ if (status == NSS_STATUS_TRYAGAIN) {
+ buflen *= 2;
+ buf = (char *)realloc(buf, buflen);
+ if (buf == NULL) {
+ return NULL;
+ }
+ goto again;
+ }
+ if (status == NSS_STATUS_NOTFOUND) {
+ SAFE_FREE(buf);
+ return NULL;
+ }
+ if (status != NSS_STATUS_SUCCESS) {
+ SAFE_FREE(buf);
+ return NULL;
+ }
+
+ return &he;
+}
+
+static int nwrap_module_gethostbyname2_r(struct nwrap_backend *b,
+ const char *name, int af,
+ struct hostent *hedst,
+ char *buf, size_t buflen,
+ struct hostent **hedstp)
+{
+ NSS_STATUS status;
+
+ *hedstp = NULL;
+
+ if (b->fns->_nss_gethostbyname2_r == NULL) {
+ return ENOENT;
+ }
+
+ status = b->fns->_nss_gethostbyname2_r(name, af, hedst,
+ buf, buflen, &errno, &h_errno);
+ switch (status) {
+ case NSS_STATUS_SUCCESS:
+ *hedstp = hedst;
+ return 0;
+ case NSS_STATUS_NOTFOUND:
+ if (errno != 0) {
+ return errno;
+ }
+ return ENOENT;
+ case NSS_STATUS_TRYAGAIN:
+ if (errno != 0) {
+ return errno;
+ }
+ return ERANGE;
+ default:
+ if (errno != 0) {
+ return errno;
+ }
+ return status;
+ }
+}
+
+static struct hostent *nwrap_module_gethostbyname(struct nwrap_backend *b,
+ const char *name)
+{
+ static struct hostent he;
+ static char *buf = NULL;
+ static size_t buflen = 1000;
+ NSS_STATUS status;
+
+ if (b->fns->_nss_gethostbyname2_r == NULL) {
+ return NULL;
+ }
+
+ if (buf == NULL) {
+ buf = (char *)malloc(buflen);
+ if (buf == NULL) {
+ return NULL;
+ }
+ }
+
+again:
+ status = b->fns->_nss_gethostbyname2_r(name, AF_UNSPEC, &he,
+ buf, buflen, &errno, &h_errno);
+ if (status == NSS_STATUS_TRYAGAIN) {
+ buflen *= 2;
+ buf = (char *)realloc(buf, buflen);
+ if (buf == NULL) {
+ return NULL;
+ }
+ goto again;
+ }
+ if (status == NSS_STATUS_NOTFOUND) {
+ SAFE_FREE(buf);
+ return NULL;
+ }
+ if (status != NSS_STATUS_SUCCESS) {
+ SAFE_FREE(buf);
+ return NULL;
+ }
+
+ return &he;
+}
+
+static struct hostent *nwrap_module_gethostbyname2(struct nwrap_backend *b,
+ const char *name, int af)
+{
+ static struct hostent he;
+ static char *buf = NULL;
+ static size_t buflen = 1000;
+ NSS_STATUS status;
+
+ if (b->fns->_nss_gethostbyname2_r == NULL) {
+ return NULL;
+ }
+
+ if (buf == NULL) {
+ buf = (char *)malloc(buflen);
+ if (buf == NULL) {
+ return NULL;
+ }
+ }
+
+again:
+ status = b->fns->_nss_gethostbyname2_r(name, af, &he,
+ buf, buflen, &errno, &h_errno);
+ if (status == NSS_STATUS_TRYAGAIN) {
+ buflen *= 2;
+ buf = (char *)realloc(buf, buflen);
+ if (buf == NULL) {
+ return NULL;
+ }
+ goto again;
+ }
+ if (status == NSS_STATUS_NOTFOUND) {
+ SAFE_FREE(buf);
+ return NULL;
+ }
+ if (status != NSS_STATUS_SUCCESS) {
+ SAFE_FREE(buf);
+ return NULL;
+ }
+
+ return &he;
+}
+
/****************************************************************************
* GETPWNAM
***************************************************************************/
static struct passwd *nwrap_getpwnam(const char *name)
{
- int i;
+ size_t i;
struct passwd *pwd;
for (i=0; i < nwrap_main_global->num_backends; i++) {
@@ -4372,7 +4664,8 @@ struct passwd *getpwnam(const char *name)
static int nwrap_getpwnam_r(const char *name, struct passwd *pwdst,
char *buf, size_t buflen, struct passwd **pwdstp)
{
- int i,ret;
+ size_t i;
+ int ret;
for (i=0; i < nwrap_main_global->num_backends; i++) {
--
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