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Diffstat (limited to 'nis/nss_nisplus/nisplus-hosts.c')
-rw-r--r--nis/nss_nisplus/nisplus-hosts.c371
1 files changed, 176 insertions, 195 deletions
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
index f5f0ac96da..540469894e 100644
--- a/nis/nss_nisplus/nisplus-hosts.c
+++ b/nis/nss_nisplus/nisplus-hosts.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2002, 2003, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
@@ -17,16 +17,15 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
-#include <atomic.h>
-#include <ctype.h>
-#include <errno.h>
-#include <netdb.h>
#include <nss.h>
+#include <netdb.h>
+#include <errno.h>
+#include <ctype.h>
#include <string.h>
-#include <arpa/inet.h>
#include <netinet/in.h>
-#include <rpcsvc/nis.h>
+#include <arpa/inet.h>
#include <bits/libc-lock.h>
+#include <rpcsvc/nis.h>
#include "nss-nisplus.h"
@@ -36,16 +35,15 @@ static nis_result *result;
static nis_name tablename_val;
static u_long tablename_len;
-#define NISENTRYVAL(idx, col, res) \
- (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
+#define NISENTRYVAL(idx,col,res) \
+ ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
-#define NISENTRYLEN(idx, col, res) \
- (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
+#define NISENTRYLEN(idx,col,res) \
+ ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
/* Get implementation for some internal functions. */
#include <resolv/mapv4v6addr.h>
-
static int
_nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
char *buffer, size_t buflen, int *errnop,
@@ -54,26 +52,27 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
unsigned int i;
char *first_unused = buffer;
size_t room_left = buflen;
+ char *data, *p, *line;
if (result == NULL)
return 0;
if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
- __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ ||
- strcmp(NIS_RES_OBJECT (result)[0].EN_data.en_type, "hosts_tbl") != 0 ||
- NIS_RES_OBJECT (result)[0].EN_data.en_cols.en_cols_len < 4)
+ __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ ||
+ strcmp(result->objects.objects_val[0].EN_data.en_type,
+ "hosts_tbl") != 0 ||
+ result->objects.objects_val[0].EN_data.en_cols.en_cols_len < 4)
return 0;
- char *data = first_unused;
-
- if (room_left < (af == AF_INET6 || (flags & AI_V4MAPPED) != 0
- ? IN6ADDRSZ : INADDRSZ))
+ if (room_left < NISENTRYLEN (0, 2, result) + 1)
{
no_more_room:
*errnop = ERANGE;
return -1;
}
+ data = first_unused;
+
/* Parse address. */
if (af == AF_INET && inet_pton (af, NISENTRYVAL (0, 2, result), data) > 0)
{
@@ -99,53 +98,51 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
/* Illegal address: ignore line. */
return 0;
- first_unused += host->h_length;
- room_left -= host->h_length;
+ first_unused+=host->h_length;
+ room_left-=host->h_length;
if (NISENTRYLEN (0, 0, result) + 1 > room_left)
goto no_more_room;
+ p = __stpncpy (first_unused, NISENTRYVAL (0, 0, result),
+ NISENTRYLEN (0, 0, result));
+ *p = '\0';
+ room_left -= (NISENTRYLEN (0, 0, result) + 1);
host->h_name = first_unused;
- first_unused = __stpncpy (first_unused, NISENTRYVAL (0, 0, result),
- NISENTRYLEN (0, 0, result));
- *first_unused++ = '\0';
- room_left -= NISENTRYLEN (0, 0, result) + 1;
-
- /* XXX Rewrite at some point to allocate the array first and then
- copy the strings. It wasteful to first concatenate the strings
- to just split them again later. */
- char *line = first_unused;
- for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
+ first_unused += NISENTRYLEN (0, 0, result) +1;
+ p = first_unused;
+
+ line = p;
+ for (i = 0; i < result->objects.objects_len; ++i)
{
if (strcmp (NISENTRYVAL (i, 1, result), host->h_name) != 0)
{
if (NISENTRYLEN (i, 1, result) + 2 > room_left)
goto no_more_room;
- *first_unused++ = ' ';
- first_unused = __stpncpy (first_unused, NISENTRYVAL (i, 1, result),
- NISENTRYLEN (i, 1, result));
- *first_unused = '\0';
- room_left -= NISENTRYLEN (i, 1, result) + 1;
+ *p++ = ' ';
+ p = __stpncpy (p, NISENTRYVAL (i, 1, result),
+ NISENTRYLEN (i, 1, result));
+ *p = '\0';
+ room_left -= (NISENTRYLEN (i, 1, result) + 1);
}
}
- *first_unused++ = '\0';
+ *p++ = '\0';
+ first_unused = p;
/* Adjust the pointer so it is aligned for
storing pointers. */
- size_t adjust = ((__alignof__ (char *)
- - (first_unused - (char *) 0) % __alignof__ (char *))
- % __alignof__ (char *));
- if (room_left < adjust + 3 * sizeof (char *))
- goto no_more_room;
- first_unused += adjust;
- room_left -= adjust;
+ first_unused += __alignof__ (char *) - 1;
+ first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
host->h_addr_list = (char **) first_unused;
+ if (room_left < 2 * sizeof (char *))
+ goto no_more_room;
- room_left -= 3 * sizeof (char *);
+ room_left -= (2 * sizeof (char *));
host->h_addr_list[0] = data;
host->h_addr_list[1] = NULL;
host->h_aliases = &host->h_addr_list[2];
+ host->h_aliases[0] = NULL;
i = 0;
while (*line != '\0')
@@ -161,46 +158,41 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
goto no_more_room;
room_left -= sizeof (char *);
- host->h_aliases[i++] = line;
+ host->h_aliases[i] = line;
while (*line != '\0' && *line != ' ')
++line;
if (*line == ' ')
- *line++ = '\0';
+ {
+ *line = '\0';
+ ++line;
+ ++i;
+ }
+ else
+ host->h_aliases[i+1] = NULL;
}
-
- host->h_aliases[i] = NULL;
-
return 1;
}
-
static enum nss_status
_nss_create_tablename (int *errnop)
{
if (tablename_val == NULL)
{
- const char *local_dir = nis_local_directory ();
- size_t local_dir_len = strlen (local_dir);
- static const char prefix[] = "hosts.org_dir.";
+ char buf [40 + strlen (nis_local_directory ())];
+ char *p;
- char *p = malloc (sizeof (prefix) + local_dir_len);
- if (p == NULL)
+ p = __stpcpy (buf, "hosts.org_dir.");
+ p = __stpcpy (p, nis_local_directory ());
+ tablename_val = __strdup (buf);
+ if (tablename_val == NULL)
{
*errnop = errno;
return NSS_STATUS_TRYAGAIN;
}
-
- memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
-
- tablename_len = sizeof (prefix) - 1 + local_dir_len;
-
- atomic_write_barrier ();
-
- tablename_val = p;
+ tablename_len = strlen (tablename_val);
}
-
return NSS_STATUS_SUCCESS;
}
@@ -212,11 +204,9 @@ _nss_nisplus_sethostent (int stayopen)
__libc_lock_lock (lock);
- if (result != NULL)
- {
- nis_freeresult (result);
- result = NULL;
- }
+ if (result)
+ nis_freeresult (result);
+ result = NULL;
if (tablename_val == NULL)
status = _nss_create_tablename (&err);
@@ -231,11 +221,9 @@ _nss_nisplus_endhostent (void)
{
__libc_lock_lock (lock);
- if (result != NULL)
- {
- nis_freeresult (result);
- result = NULL;
- }
+ if (result)
+ nis_freeresult (result);
+ result = NULL;
__libc_lock_unlock (lock);
@@ -265,11 +253,6 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
}
result = nis_first_entry (tablename_val);
- if (result == NULL)
- {
- *errnop = errno;
- return NSS_STATUS_TRYAGAIN;
- }
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
enum nss_status retval = niserr2nss (result->status);
@@ -284,13 +267,11 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
}
else
{
+ nis_result *res2;
+
saved_res = result;
- result = nis_next_entry (tablename_val, &result->cookie);
- if (result == NULL)
- {
- *errnop = errno;
- return NSS_STATUS_TRYAGAIN;
- }
+ res2 = nis_next_entry(tablename_val, &result->cookie);
+ result = res2;
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
{
enum nss_status retval= niserr2nss (result->status);
@@ -354,12 +335,8 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
if (tablename_val == NULL)
{
- __libc_lock_lock (lock);
-
enum nss_status status = _nss_create_tablename (errnop);
- __libc_lock_unlock (lock);
-
if (status != NSS_STATUS_SUCCESS)
{
*herrnop = NETDB_INTERNAL;
@@ -373,81 +350,75 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
*herrnop = NETDB_INTERNAL;
return NSS_STATUS_NOTFOUND;
}
+ else
+ {
+ nis_result *result;
+ char buf[strlen (name) + 255 + tablename_len];
+ int olderr = errno;
- nis_result *result;
- char buf[strlen (name) + 10 + tablename_len];
- int olderr = errno;
+ /* Search at first in the alias list, and use the correct name
+ for the next search */
+ sprintf (buf, "[name=%s],%s", name, tablename_val);
+ result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
- /* Search at first in the alias list, and use the correct name
- for the next search. */
- snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
- result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+ if (result != NULL)
+ {
+ /* If we do not find it, try it as original name. But if the
+ database is correct, we should find it in the first case, too */
+ if ((result->status != NIS_SUCCESS
+ && result->status != NIS_S_SUCCESS)
+ || __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
+ || strcmp (result->objects.objects_val->EN_data.en_type,
+ "hosts_tbl") != 0
+ || result->objects.objects_val->EN_data.en_cols.en_cols_len < 3)
+ sprintf (buf, "[cname=%s],%s", name, tablename_val);
+ else
+ sprintf (buf, "[cname=%s],%s", NISENTRYVAL(0, 0, result),
+ tablename_val);
- if (result != NULL)
- {
- char *bufptr = buf;
-
- /* If we did not find it, try it as original name. But if the
- database is correct, we should find it in the first case, too. */
- if ((result->status != NIS_SUCCESS
- && result->status != NIS_S_SUCCESS)
- || __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
- || strcmp (result->objects.objects_val->EN_data.en_type,
- "hosts_tbl") != 0
- || result->objects.objects_val->EN_data.en_cols.en_cols_len < 3)
- snprintf (buf, sizeof (buf), "[cname=%s],%s", name, tablename_val);
- else
+ nis_freeresult (result);
+ result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+ }
+
+ if (result == NULL)
{
- /* We need to allocate a new buffer since there is no
- guarantee the returned name has a length limit. */
- const char *entryval = NISENTRYVAL(0, 0, result);
- size_t buflen = strlen (entryval) + 10 + tablename_len;
- bufptr = alloca (buflen);
- snprintf (bufptr, buflen, "[cname=%s],%s",
- entryval, tablename_val);
+ *errnop = ENOMEM;
+ return NSS_STATUS_TRYAGAIN;
}
+ retval = niserr2nss (result->status);
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ *errnop = errno;
+ *herrnop = NETDB_INTERNAL;
+ }
+ else
+ __set_errno (olderr);
+ nis_freeresult (result);
+ return retval;
+ }
+
+ parse_res = _nss_nisplus_parse_hostent (result, af, host, buffer,
+ buflen, errnop, flags);
nis_freeresult (result);
- result = nis_list (bufptr, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
- }
- if (result == NULL)
- {
- *errnop = ENOMEM;
- return NSS_STATUS_TRYAGAIN;
- }
+ if (parse_res > 0)
+ return NSS_STATUS_SUCCESS;
- retval = niserr2nss (result->status);
- if (__builtin_expect (retval != NSS_STATUS_SUCCESS, 0))
- {
- if (retval == NSS_STATUS_TRYAGAIN)
+ *herrnop = NETDB_INTERNAL;
+ if (parse_res == -1)
{
- *errnop = errno;
- *herrnop = NETDB_INTERNAL;
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
}
else
- __set_errno (olderr);
- nis_freeresult (result);
- return retval;
- }
-
- parse_res = _nss_nisplus_parse_hostent (result, af, host, buffer,
- buflen, errnop, flags);
-
- nis_freeresult (result);
-
- if (parse_res > 0)
- return NSS_STATUS_SUCCESS;
-
- *herrnop = NETDB_INTERNAL;
- if (parse_res == -1)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
+ {
+ __set_errno (olderr);
+ return NSS_STATUS_NOTFOUND;
+ }
}
-
- __set_errno (olderr);
- return NSS_STATUS_NOTFOUND;
}
enum nss_status
@@ -460,6 +431,17 @@ _nss_nisplus_gethostbyname2_r (const char *name, int af, struct hostent *host,
((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0));
}
+#if 0
+enum nss_status
+_nss_nisplus_getipnodebyname_r (const char *name, int af, int flags,
+ struct hostent *result, char *buffer,
+ size_t buflen, int *errnop, int *herrnop)
+{
+ return internal_gethostbyname2_r (name, af, result, buffer, buflen,
+ errnop, herrnop, flags);
+}
+#endif
+
enum nss_status
_nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
char *buffer, size_t buflen, int *errnop,
@@ -487,63 +469,62 @@ _nss_nisplus_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
{
if (tablename_val == NULL)
{
- __libc_lock_lock (lock);
-
enum nss_status status = _nss_create_tablename (errnop);
- __libc_lock_unlock (lock);
-
if (status != NSS_STATUS_SUCCESS)
return status;
}
if (addr == NULL)
return NSS_STATUS_NOTFOUND;
-
- char buf[24 + tablename_len];
- int retval, parse_res;
- int olderr = errno;
-
- snprintf (buf, sizeof (buf), "[addr=%s],%s",
- inet_ntoa (*(const struct in_addr *) addr), tablename_val);
- nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
-
- if (result == NULL)
+ else
{
- __set_errno (ENOMEM);
- return NSS_STATUS_TRYAGAIN;
- }
+ nis_result *result;
+ char buf[255 + tablename_len];
+ int retval, parse_res;
+ int olderr = errno;
- retval = niserr2nss (result->status);
- if (__builtin_expect (retval != NSS_STATUS_SUCCESS, 0))
- {
- if (retval == NSS_STATUS_TRYAGAIN)
+ sprintf (buf, "[addr=%s],%s",
+ inet_ntoa (*(const struct in_addr *) addr), tablename_val);
+ result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+
+ if (result == NULL)
{
- *errnop = errno;
- *herrnop = NETDB_INTERNAL;
+ __set_errno (ENOMEM);
+ return NSS_STATUS_TRYAGAIN;
}
- else
- __set_errno (olderr);
- nis_freeresult (result);
- return retval;
- }
+ retval = niserr2nss (result->status);
+ if (retval != NSS_STATUS_SUCCESS)
+ {
+ if (retval == NSS_STATUS_TRYAGAIN)
+ {
+ *errnop = errno;
+ *herrnop = NETDB_INTERNAL;
+ }
+ else
+ __set_errno (olderr);
+ nis_freeresult (result);
+ return retval;
+ }
- parse_res = _nss_nisplus_parse_hostent (result, af, host,
- buffer, buflen, errnop,
- ((_res.options & RES_USE_INET6)
- ? AI_V4MAPPED : 0));
- nis_freeresult (result);
+ parse_res = _nss_nisplus_parse_hostent (result, af, host,
+ buffer, buflen, errnop,
+ ((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0));
+ nis_freeresult (result);
- if (parse_res > 0)
- return NSS_STATUS_SUCCESS;
+ if (parse_res > 0)
+ return NSS_STATUS_SUCCESS;
- *herrnop = NETDB_INTERNAL;
- if (parse_res == -1)
- {
- *errnop = ERANGE;
- return NSS_STATUS_TRYAGAIN;
+ *herrnop = NETDB_INTERNAL;
+ if (parse_res == -1)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ else
+ {
+ __set_errno (olderr);
+ return NSS_STATUS_NOTFOUND;
+ }
}
-
- __set_errno (olderr);
- return NSS_STATUS_NOTFOUND;
}