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-rw-r--r--ChangeLog5
-rw-r--r--nis/nss_nisplus/nisplus-hosts.c88
2 files changed, 49 insertions, 44 deletions
diff --git a/ChangeLog b/ChangeLog
index 9f5ff88..3258c32 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2006-04-15 Ulrich Drepper <drepper@redhat.com>
+
+ * nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_parse_hostent):
+ Significant cleanups. Correct adjustment for pointer array.
+
2006-04-14 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/syscalls.list: Add tee syscall.
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
index bf002d6..023e18f 100644
--- a/nis/nss_nisplus/nisplus-hosts.c
+++ b/nis/nss_nisplus/nisplus-hosts.c
@@ -36,15 +36,16 @@ static nis_result *result;
static nis_name tablename_val;
static u_long tablename_len;
-#define NISENTRYVAL(idx,col,res) \
- ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
+#define NISENTRYVAL(idx, col, res) \
+ (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
-#define NISENTRYLEN(idx,col,res) \
- ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
+#define NISENTRYLEN(idx, col, res) \
+ (NIS_RES_OBJECT (res)[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,
@@ -53,27 +54,26 @@ _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 (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)
+ __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)
return 0;
- if (room_left < NISENTRYLEN (0, 2, result) + 1)
+ char *data = first_unused;
+
+ if (room_left < (af == AF_INET6 || (flags & AI_V4MAPPED) != 0
+ ? IN6ADDRSZ : INADDRSZ))
{
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)
{
@@ -99,51 +99,53 @@ _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 += NISENTRYLEN (0, 0, result) +1;
- p = first_unused;
-
- line = p;
- for (i = 0; i < result->objects.objects_len; ++i)
+ 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)
{
if (strcmp (NISENTRYVAL (i, 1, result), host->h_name) != 0)
{
if (NISENTRYLEN (i, 1, result) + 2 > room_left)
goto no_more_room;
- *p++ = ' ';
- p = __stpncpy (p, NISENTRYVAL (i, 1, result),
- NISENTRYLEN (i, 1, result));
- *p = '\0';
- room_left -= (NISENTRYLEN (i, 1, result) + 1);
+ *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++ = '\0';
- first_unused = p;
+ *first_unused++ = '\0';
/* Adjust the pointer so it is aligned for
storing pointers. */
- 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 *))
+ 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;
+ host->h_addr_list = (char **) first_unused;
- room_left -= (2 * sizeof (char *));
+ room_left -= 3 * 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')
@@ -159,23 +161,21 @@ _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;
- ++i;
- }
- else
- host->h_aliases[i+1] = NULL;
+ *line++ = '\0';
}
+
+ host->h_aliases[i] = NULL;
+
return 1;
}
+
static enum nss_status
_nss_create_tablename (int *errnop)
{
generated by cgit v1.1 at 2024-12-04 21:52:46 +0000