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authorUlrich Drepper <drepper@redhat.com>2008-05-10 23:27:39 +0000
committerUlrich Drepper <drepper@redhat.com>2008-05-10 23:27:39 +0000
commit1eb946b93509b94db2bddce741f2f3b483418a6d (patch)
tree054e49d0b1be9539a0d778c4b1a6252ac4d68523 /nis/nss_nisplus/nisplus-hosts.c
parenta82e8bb8d0b51d30cb0d8d24f0ff0f72066cf2ce (diff)
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* include/resolv.h: Adjust __libc_res_nquery and __libc_res_nsend
prototypes. * include/arpa/nameser_compat.h: Define T_UNSPEC. * nis/Versions (libnss_nis): Export _nss_nis_gethostbyname4_r. (libnss_nisplus): Export _nss_nisplus_gethostbyname4_r. * nis/nss_nis/nis-hosts.c (LINE_PARSER): Change to also handle af==AF_UNSPEC. (_nss_nis_gethostbyname4_r): New function. * nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_parse_hostent): Change to also handle af==AF_UNSPEC. (get_tablename): New function. Use it to avoid duplication. (_nss_nisplus_gethostbyname4_r): New function. * nscd/aicache.c (addhstaiX): Use gethostbyname4_r function is available. * nss/Versions (libnss_files): Export _nss_files_gethostbyname4_r. * nss/nss.h: Define struct gaih_addrtuple. * nss/nss_files/files-hosts.c (LINE_PARSER): Change to also handle af==AF_UNSPEC. (_nss_files_gethostbyname4_r): New function. * resolv/Versions (libnss_dns): Export _nss_dns_gethostbyname4_r. * resolv/gethnmaddr.c: Adjust __libc_res_nsearch and __libc_res_nquery calls. * resolv/res_query.c (__libc_res_nquery): Take two additional parameters for second answer buffer. Handle type=T_UNSPEC to mean look up IPv4 and IPv6. Change all callers. * resolv/res_send.c (__libc_res_nsend): Take five aditional parameters for an additional query and answer buffer. Pass to send_vc and send_dg. (send_vc): Send possibly two requests and receive two answers. (send_dg): Likewise. * resolv/nss_dns/dns-host.c: Adjust calls to __libc_res_nsearch and __libc_res_nquery. (_nss_dns_gethostbyname4_r): New function. (gaih_getanswer_slice): Likewise. (gaih_getanswer): Likewise. * resolv/nss_dns/dns-canon.c (_nss_dns_getcanonname_r): Adjust __libc_res_nquery call. * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyaddr_r): Likewise. (_nss_dns_getnetbyname_r): Adjust __libc_res_nsearch call. * sysdeps/posix/getaddrinfo.c: Use gethostbyname4_r function is available.
Diffstat (limited to 'nis/nss_nisplus/nisplus-hosts.c')
-rw-r--r--nis/nss_nisplus/nisplus-hosts.c222
1 files changed, 144 insertions, 78 deletions
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
index f5f0ac96da..37d44773fc 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) 1997-2003, 2005, 2006, 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
@@ -17,6 +17,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <assert.h>
#include <atomic.h>
#include <ctype.h>
#include <errno.h>
@@ -58,15 +59,15 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
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)
+ 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)
return 0;
char *data = first_unused;
- if (room_left < (af == AF_INET6 || (flags & AI_V4MAPPED) != 0
+ if (room_left < (af != AF_INET || (flags & AI_V4MAPPED) != 0
? IN6ADDRSZ : INADDRSZ))
{
no_more_room:
@@ -75,8 +76,10 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
}
/* Parse address. */
- if (af == AF_INET && inet_pton (af, NISENTRYVAL (0, 2, result), data) > 0)
+ if (af != AF_INET6
+ && inet_pton (AF_INET, NISENTRYVAL (0, 2, result), data) > 0)
{
+ assert ((flags & AI_V4MAPPED) == 0 || af != AF_UNSPEC);
if (flags & AI_V4MAPPED)
{
map_v4v6_address (data, data);
@@ -89,7 +92,7 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
host->h_length = INADDRSZ;
}
}
- else if (af == AF_INET6
+ else if (af != AF_INET
&& inet_pton (AF_INET6, NISENTRYVAL (0, 2, result), data) > 0)
{
host->h_addrtype = AF_INET6;
@@ -109,27 +112,33 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
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. */
+ room_left -= NISENTRYLEN (0, 0, result) + 1;
char *line = first_unused;
- for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
+
+ /* When this is a call to gethostbyname4_r we do not need the aliases. */
+ if (af != AF_UNSPEC)
{
- if (strcmp (NISENTRYVAL (i, 1, result), host->h_name) != 0)
+ /* XXX Rewrite at some point to allocate the array first and then
+ copy the strings. It is wasteful to first concatenate the strings
+ to just split them again later. */
+ for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
{
- 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;
+ 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;
+ }
}
+ *first_unused++ = '\0';
}
- *first_unused++ = '\0';
/* Adjust the pointer so it is aligned for
storing pointers. */
@@ -147,30 +156,34 @@ _nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
host->h_addr_list[1] = NULL;
host->h_aliases = &host->h_addr_list[2];
- i = 0;
- while (*line != '\0')
+ /* When this is a call to gethostbyname4_r we do not need the aliases. */
+ if (af != AF_UNSPEC)
{
- /* Skip leading blanks. */
- while (isspace (*line))
- ++line;
+ i = 0;
+ while (*line != '\0')
+ {
+ /* Skip leading blanks. */
+ while (isspace (*line))
+ ++line;
- if (*line == '\0')
- break;
+ if (*line == '\0')
+ break;
- if (room_left < sizeof (char *))
- goto no_more_room;
+ if (room_left < sizeof (char *))
+ goto no_more_room;
- room_left -= sizeof (char *);
- host->h_aliases[i++] = line;
+ room_left -= sizeof (char *);
+ host->h_aliases[i++] = line;
- while (*line != '\0' && *line != ' ')
- ++line;
+ while (*line != '\0' && *line != ' ')
+ ++line;
- if (*line == ' ')
- *line++ = '\0';
- }
+ if (*line == ' ')
+ *line++ = '\0';
+ }
- host->h_aliases[i] = NULL;
+ host->h_aliases[i] = NULL;
+ }
return 1;
}
@@ -204,6 +217,7 @@ _nss_create_tablename (int *errnop)
return NSS_STATUS_SUCCESS;
}
+
enum nss_status
_nss_nisplus_sethostent (int stayopen)
{
@@ -226,6 +240,7 @@ _nss_nisplus_sethostent (int stayopen)
return status;
}
+
enum nss_status
_nss_nisplus_endhostent (void)
{
@@ -242,6 +257,7 @@ _nss_nisplus_endhostent (void)
return NSS_STATUS_SUCCESS;
}
+
static enum nss_status
internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
size_t buflen, int *errnop, int *herrnop)
@@ -329,6 +345,7 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
return NSS_STATUS_SUCCESS;
}
+
enum nss_status
_nss_nisplus_gethostent_r (struct hostent *result, char *buffer,
size_t buflen, int *errnop, int *herrnop)
@@ -345,26 +362,33 @@ _nss_nisplus_gethostent_r (struct hostent *result, char *buffer,
return status;
}
+
+static enum nss_status
+get_tablename (int *herrnop)
+{
+ __libc_lock_lock (lock);
+
+ enum nss_status status = _nss_create_tablename (herrnop);
+
+ __libc_lock_unlock (lock);
+
+ if (status != NSS_STATUS_SUCCESS)
+ *herrnop = NETDB_INTERNAL;
+
+ return status;
+}
+
+
static enum nss_status
internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
char *buffer, size_t buflen, int *errnop,
int *herrnop, int flags)
{
- int parse_res, retval;
-
if (tablename_val == NULL)
{
- __libc_lock_lock (lock);
-
- enum nss_status status = _nss_create_tablename (errnop);
-
- __libc_lock_unlock (lock);
-
+ enum nss_status status = get_tablename (herrnop);
if (status != NSS_STATUS_SUCCESS)
- {
- *herrnop = NETDB_INTERNAL;
- return NSS_STATUS_UNAVAIL;
- }
+ return status;
}
if (name == NULL)
@@ -374,39 +398,36 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return NSS_STATUS_NOTFOUND;
}
- 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. */
snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
- result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+ nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
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
+ char *bufptr = buf;
+ size_t buflen = sizeof (buf);
+
+ 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)
{
/* 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;
+ guarantee the returned alias name has a length limit. */
+ name = NISENTRYVAL(0, 0, result);
+ size_t buflen = strlen (name) + 10 + tablename_len;
bufptr = alloca (buflen);
- snprintf (bufptr, buflen, "[cname=%s],%s",
- entryval, tablename_val);
}
+ snprintf (bufptr, buflen, "[cname=%s],%s", name, tablename_val);
+
nis_freeresult (result);
result = nis_list (bufptr, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
}
@@ -417,7 +438,7 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return NSS_STATUS_TRYAGAIN;
}
- retval = niserr2nss (result->status);
+ int retval = niserr2nss (result->status);
if (__builtin_expect (retval != NSS_STATUS_SUCCESS, 0))
{
if (retval == NSS_STATUS_TRYAGAIN)
@@ -431,8 +452,8 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return retval;
}
- parse_res = _nss_nisplus_parse_hostent (result, af, host, buffer,
- buflen, errnop, flags);
+ int parse_res = _nss_nisplus_parse_hostent (result, af, host, buffer,
+ buflen, errnop, flags);
nis_freeresult (result);
@@ -450,16 +471,24 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
return NSS_STATUS_NOTFOUND;
}
+
enum nss_status
_nss_nisplus_gethostbyname2_r (const char *name, int af, struct hostent *host,
char *buffer, size_t buflen, int *errnop,
int *herrnop)
{
+ if (af != AF_INET && af != AF_INET6)
+ {
+ *herrnop = HOST_NOT_FOUND;
+ return NSS_STATUS_NOTFOUND;
+ }
+
return internal_gethostbyname2_r (name, af, host, buffer, buflen, errnop,
herrnop,
((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0));
}
+
enum nss_status
_nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
char *buffer, size_t buflen, int *errnop,
@@ -480,6 +509,7 @@ _nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
buflen, errnop, h_errnop, 0);
}
+
enum nss_status
_nss_nisplus_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
struct hostent *host, char *buffer,
@@ -487,12 +517,7 @@ _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);
-
+ enum nss_status status = get_tablename (herrnop);
if (status != NSS_STATUS_SUCCESS)
return status;
}
@@ -547,3 +572,44 @@ _nss_nisplus_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
__set_errno (olderr);
return NSS_STATUS_NOTFOUND;
}
+
+
+enum nss_status
+_nss_nisplus_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat,
+ char *buffer, size_t buflen, int *errnop,
+ int *herrnop, int32_t *ttlp)
+{
+ struct hostent host;
+
+ enum nss_status status = internal_gethostbyname2_r (name, AF_UNSPEC, &host,
+ buffer, buflen,
+ errnop, herrnop, 0);
+ if (__builtin_expect (status == NSS_STATUS_SUCCESS, 1))
+ {
+ if (*pat == NULL)
+ {
+ uintptr_t pad = (-(uintptr_t) buffer
+ % __alignof__ (struct gaih_addrtuple));
+ buffer += pad;
+ buflen = buflen > pad ? buflen - pad : 0;
+
+ if (__builtin_expect (buflen < sizeof (struct gaih_addrtuple), 0))
+ {
+ free (result);
+ *errnop = ERANGE;
+ *herrnop = NETDB_INTERNAL;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ }
+
+ (*pat)->next = NULL;
+ (*pat)->name = host.h_name;
+ (*pat)->family = host.h_addrtype;
+
+ memcpy ((*pat)->addr, host.h_addr_list[0], host.h_length);
+ (*pat)->scopeid = 0;
+ assert (host.h_addr_list[1] == NULL);
+ }
+
+ return status;
+}