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ldap-grp.c
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ldap-grp.c
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/* Copyright (C) 1997-2006 Luke Howard.
This file is part of the nss_ldap library.
Contributed by Luke Howard, <[email protected]>, 1997.
The nss_ldap library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The nss_ldap library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the nss_ldap library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
static char rcsId[] =
"$Id$";
#include "config.h"
#ifdef HAVE_PORT_BEFORE_H
#include <port_before.h>
#endif
#if defined(HAVE_THREAD_H) && !defined(_AIX)
#include <thread.h>
#elif defined(HAVE_PTHREAD_H)
#include <pthread.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <grp.h>
#ifdef HAVE_LBER_H
#include <lber.h>
#endif
#ifdef HAVE_LDAP_H
#include <ldap.h>
#endif
#ifndef HAVE_SNPRINTF
#include "snprintf.h"
#endif
#include "ldap-nss.h"
#include "ldap-grp.h"
#include "util.h"
#ifdef HAVE_PORT_AFTER_H
#include <port_after.h>
#endif
#ifdef HAVE_NSS_H
static ent_context_t *gr_context = NULL;
#endif
#ifdef HAVE_USERSEC_H
typedef struct ldap_initgroups_args
{
char *grplist;
size_t listlen;
int depth;
struct name_list *known_groups;
int backlink;
}
ldap_initgroups_args_t;
#else
# ifdef HAVE_NSSWITCH_H
typedef struct ldap_initgroups_args
{
struct nss_groupsbymem *gbm;
int depth;
struct name_list *known_groups;
int backlink;
}
ldap_initgroups_args_t;
# else
typedef struct ldap_initgroups_args
{
gid_t group;
long int *start;
long int *size;
gid_t **groups;
long int limit;
int depth;
struct name_list *known_groups;
int backlink;
}
ldap_initgroups_args_t;
# endif
#endif /* HAVE_USERSEC_H */
static NSS_STATUS
ng_chase (const char *dn, ldap_initgroups_args_t * lia);
static NSS_STATUS
ng_chase_backlink (const char ** membersOf, ldap_initgroups_args_t * lia);
/*
* Range retrieval logic was reimplemented from example in
* http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ldap/ldap/searching_using_range_retrieval.asp
*/
static NSS_STATUS
do_parse_range (const char *attributeType,
const char *attributeDescription, int *start, int *end)
{
NSS_STATUS stat = NSS_NOTFOUND;
char *attribute;
size_t attributeTypeLength;
size_t attributeDescriptionLength;
char *p;
#ifdef HAVE_STRTOK_R
char *st = NULL;
#endif
debug ("==> do_parse_range");
*start = 0;
*end = -1;
if (strcasecmp (attributeType, attributeDescription) == 0)
{
debug ("==> do_parse_range: returns NSS_SUCCESS");
return NSS_SUCCESS;
}
attributeDescriptionLength = strlen (attributeDescription);
attributeTypeLength = strlen (attributeType);
if (attributeDescriptionLength < attributeTypeLength)
{
/* could not be a subtype */
debug ("<== do_parse_range: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
/* XXX need to copy as strtok() is destructive */
attribute = strdup (attributeDescription);
if (attribute == NULL)
{
debug ("<== do_parse_range: returns NSS_TRYAGAIN");
return NSS_TRYAGAIN;
}
#ifndef HAVE_STRTOK_R
for (p = strtok (attribute, ";"); p != NULL; p = strtok (NULL, ";"))
#else
for (p = strtok_r (attribute, ";", &st);
p != NULL; p = strtok_r (NULL, ";", &st))
#endif /* !HAVE_STRTOK_R */
{
char *q;
if (p == attribute)
{
if (strcasecmp (p, attributeType) != 0)
{
free (attribute);
debug ("<== do_parse_range: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
}
else if (strncasecmp (p, "range=", sizeof ("range=") - 1) == 0)
{
p += sizeof ("range=") - 1;
q = strchr (p, '-');
if (q == NULL)
{
free (attribute);
debug ("<== do_parse_range: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
*q++ = '\0';
*start = strtoul (p, (char **) NULL, 10);
if (strcmp (q, "*") == 0)
*end = -1;
else
*end = strtoul (q, (char **) NULL, 10);
stat = NSS_SUCCESS;
break;
}
}
free (attribute);
debug ("<== do_parse_range: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
static NSS_STATUS
do_get_range_values (LDAPMessage * e,
const char *attributeType,
int *start, int *end, char ***pGroupMembers)
{
NSS_STATUS stat = NSS_NOTFOUND;
BerElement *ber = NULL;
char *attribute;
debug ("==> do_get_range_values");
*pGroupMembers = NULL;
for (attribute = _nss_ldap_first_attribute (e, &ber);
attribute != NULL; attribute = _nss_ldap_next_attribute (e, ber))
{
stat = do_parse_range (attributeType, attribute, start, end);
if (stat == NSS_SUCCESS)
{
*pGroupMembers = _nss_ldap_get_values (e, attribute);
if (*pGroupMembers == NULL)
{
stat = NSS_NOTFOUND;
}
else if ((*pGroupMembers)[0] == NULL)
{
debug (":== do_get_range_values: call ldap_value_free");
ldap_value_free (*pGroupMembers);
*pGroupMembers = NULL;
stat = NSS_NOTFOUND;
}
}
#ifdef HAVE_LDAP_MEMFREE
debug (":== do_get_range_values: call ldap_memfree");
ldap_memfree (attribute);
#endif
if (stat == NSS_SUCCESS)
break;
}
if (ber != NULL)
{
debug (":== do_get_range_values: call ber_free");
ber_free (ber, 0);
}
debug ("<== do_get_range_values: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
/*
* Format an attribute with description as:
* attribute;range=START-END
*/
static NSS_STATUS
do_construct_range_attribute (const char *attribute,
int start,
int end,
char **buffer,
size_t * buflen,
const char **pAttributeWithRange)
{
size_t len;
char startbuf[32], endbuf[32];
debug ("==> do_construct_range_attribute");
snprintf (startbuf, sizeof (startbuf), "%u", start);
if (end != -1)
snprintf (endbuf, sizeof (endbuf), "%u", end);
else
snprintf (endbuf, sizeof (endbuf), "*");
len = strlen (attribute) + sizeof (";range=") - 1;
len += strlen (startbuf) + 1 /* - */ + strlen (endbuf);
len++; /* \0 */
if (*buflen < len)
{
debug ("<== do_construct_range_attribute: returns NSS_TRYAGAIN");
return NSS_TRYAGAIN;
}
*pAttributeWithRange = *buffer;
snprintf (*buffer, len, "%s;range=%s-%s", attribute, startbuf, endbuf);
*buffer += len;
*buflen -= len;
debug ("<== do_construct_range_attribute: returns NSS_SUCCESS");
return NSS_SUCCESS;
}
/*
* Expand group members, including nested groups
*/
static NSS_STATUS
do_parse_group_members (LDAPMessage * e,
char ***pGroupMembers,
size_t * pGroupMembersCount,
size_t * pGroupMembersNext,
size_t * pGroupMembersBufferSize,
int *pGroupMembersBufferIsMalloced,
char **buffer, size_t * buflen,
int *depth,
struct name_list **pKnownGroups,
int itemsLeft) /* traversed groups */
{
NSS_STATUS stat = NSS_SUCCESS;
char **dnValues = NULL;
char **uidValues = NULL;
char **groupMembers;
size_t groupMembersCount, i;
char **valiter;
/* support for range retrieval */
const char *uniquemember_attr;
const char *uniquemember_attrs[2];
LDAPMessage *res = NULL;
int start, end = 0;
char *groupdn = NULL;
debug ("==> do_parse_group_members");
uniquemember_attr = ATM (LM_GROUP, uniqueMember);
uniquemember_attrs[0] = uniquemember_attr;
uniquemember_attrs[1] = NULL;
if (*depth > LDAP_NSS_MAXGR_DEPTH)
{
debug ("<== do_parse_group_members: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
i = *pGroupMembersNext; /* index of next member */
groupMembers = *pGroupMembers;
groupdn = _nss_ldap_get_dn (e);
if (groupdn == NULL)
{
stat = NSS_NOTFOUND;
goto out;
}
if (_nss_ldap_namelist_find (*pKnownGroups, groupdn))
{
stat = NSS_NOTFOUND;
goto out;
}
/* store group DN for nested group loop detection */
stat = _nss_ldap_namelist_push (pKnownGroups, groupdn);
if (stat != NSS_SUCCESS)
{
goto out;
}
do
{
if (e == NULL)
{
stat = NSS_NOTFOUND;
goto out;
}
groupMembersCount = 0; /* number of members in this group */
(void) do_get_range_values (e, uniquemember_attrs[0], &start, &end, &dnValues);
if (dnValues != NULL)
{
debug (":== do_parse_group_members: call ldap_count_values on dnValues");
groupMembersCount += ldap_count_values (dnValues);
}
uidValues = _nss_ldap_get_values (e, ATM (LM_GROUP, memberUid));
if (uidValues != NULL)
{
debug (":== do_parse_group_members: call ldap_count_values on uidValues");
groupMembersCount += ldap_count_values (uidValues);
}
/*
* Check whether we need to increase the group membership buffer.
* As an optimization the buffer is preferentially allocated off
* the stack
*/
if ((*pGroupMembersCount + groupMembersCount) * sizeof (char *) >=
*pGroupMembersBufferSize)
{
*pGroupMembersBufferSize =
(*pGroupMembersCount + groupMembersCount + 1) * sizeof (char *);
*pGroupMembersBufferSize +=
(LDAP_NSS_NGROUPS * sizeof (char *)) - 1;
*pGroupMembersBufferSize -=
(*pGroupMembersBufferSize %
(LDAP_NSS_NGROUPS * sizeof (char *)));
if (*pGroupMembersBufferIsMalloced == 0)
{
groupMembers = *pGroupMembers;
*pGroupMembers = NULL; /* force malloc() */
}
*pGroupMembers =
(char **) realloc (*pGroupMembers, *pGroupMembersBufferSize);
if (*pGroupMembers == NULL)
{
*pGroupMembersBufferIsMalloced = 0; /* don't try to free */
stat = NSS_TRYAGAIN;
goto out;
}
if (*pGroupMembersBufferIsMalloced == 0)
{
memcpy (*pGroupMembers, groupMembers, i * sizeof (char *));
groupMembers = NULL; /* defensive programming */
*pGroupMembersBufferIsMalloced = 1;
}
}
groupMembers = *pGroupMembers;
*pGroupMembersCount += groupMembersCount;
/* Parse distinguished name members */
if (dnValues != NULL)
{
for (valiter = dnValues; *valiter != NULL; valiter++)
{
LDAPMessage *res;
NSS_STATUS parseStat;
int isNestedGroup = 0;
char *uid;
uid = strrchr (*valiter, '#');
if (uid != NULL)
{
*uid = '\0';
}
parseStat = _nss_ldap_dn2uid (*valiter, &groupMembers[i],
buffer, buflen, &isNestedGroup,
&res);
if (parseStat == NSS_SUCCESS)
{
if (isNestedGroup == 0)
{
/* just a normal user which we have flattened */
i++;
itemsLeft--;
continue;
}
(*depth)++;
parseStat =
do_parse_group_members (_nss_ldap_first_entry (res),
&groupMembers, pGroupMembersCount, &i,
pGroupMembersBufferSize,
pGroupMembersBufferIsMalloced,
buffer, buflen, depth,
pKnownGroups, itemsLeft);
(*depth)--;
if (parseStat == NSS_TRYAGAIN)
{
stat = NSS_TRYAGAIN;
goto out;
}
debug (":== do_parse_group_members: call ldap_msgfree");
ldap_msgfree (res);
}
else if (parseStat == NSS_TRYAGAIN)
{
stat = NSS_TRYAGAIN;
goto out;
}
}
}
/* Parse RFC 2307 (flat) members */
if (uidValues != NULL)
{
for (valiter = uidValues; *valiter != NULL; valiter++)
{
size_t len = strlen (*valiter) + 1;
if (*buflen < len)
{
stat = NSS_TRYAGAIN;
goto out;
}
groupMembers[i] = *buffer;
*buffer += len;
*buflen -= len;
memcpy (groupMembers[i++], *valiter, len);
}
}
/* Get next range for Active Directory compat */
if (end != -1)
{
stat = do_construct_range_attribute (uniquemember_attr,
end + 1,
-1,
buffer,
buflen,
&uniquemember_attrs[0]);
if (stat == NSS_SUCCESS)
{
if (dnValues != NULL)
{
debug (":== do_parse_group_members: call ldap_value_free on dnValues");
ldap_value_free (dnValues);
dnValues = NULL;
}
if (uidValues != NULL)
{
debug (":== do_parse_group_members: call ldap_value_free on uidValues");
ldap_value_free (uidValues);
uidValues = NULL;
}
if (res != NULL)
{
debug (":== do_parse_group_members: call ldap_msgfree");
ldap_msgfree (res);
res = NULL;
}
stat = _nss_ldap_read (groupdn, uniquemember_attrs, &res);
if (stat != NSS_SUCCESS)
goto out;
e = _nss_ldap_first_entry (res);
}
}
}
while (end != -1);
out:
if (dnValues != NULL)
{
debug (":== do_parse_group_members: call ldap_value_free on dnValues");
ldap_value_free (dnValues);
}
if (uidValues != NULL)
{
debug (":== do_parse_group_members: call ldap_value_free on uidValues");
ldap_value_free (uidValues);
}
if (res != NULL)
{
debug (":== do_parse_group_members: call ldap_msgfree");
ldap_msgfree (res);
}
if (groupdn != NULL)
{
#ifdef HAVE_LDAP_MEMFREE
debug (":== do_parse_group_members: call ldap_memfree");
ldap_memfree (groupdn);
#else
free (groupdn);
#endif
}
*pGroupMembers = groupMembers;
*pGroupMembersNext = i;
debug ("<== do_parse_group_members: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
/*
* "Fix" group membership list into caller provided buffer,
* and NULL terminate.
*/
static NSS_STATUS
do_fix_group_members_buffer (char **mallocedGroupMembers,
size_t groupMembersCount,
char ***pGroupMembers,
char **buffer, size_t * buflen)
{
size_t len;
debug ("==> do_fix_group_members_buffer");
len = (groupMembersCount + 1) * sizeof (char *);
if (bytesleft (*buffer, *buflen, char *) < len)
{
debug ("<== do_fix_group_members_buffer: returns NSS_TRYAGAIN");
return NSS_TRYAGAIN;
}
align (*buffer, *buflen, char *);
*pGroupMembers = (char **) *buffer;
*buffer += len;
*buflen -= len;
memcpy (*pGroupMembers, mallocedGroupMembers,
groupMembersCount * sizeof (char *));
(*pGroupMembers)[groupMembersCount] = NULL;
debug ("<== do_fix_group_members_buffer: returns NSS_SUCCESS");
return NSS_SUCCESS;
}
static NSS_STATUS
_nss_ldap_parse_gr (LDAPMessage * e,
ldap_state_t * pvt,
void *result, char *buffer, size_t buflen)
{
struct group *gr = (struct group *) result;
char *gid;
NSS_STATUS stat;
char **groupMembers;
size_t groupMembersCount, groupMembersAttrCount;
size_t groupMembersBufferSize;
char *groupMembersBuffer[LDAP_NSS_NGROUPS];
int groupMembersBufferIsMalloced;
int depth;
struct name_list *knownGroups = NULL;
debug ("==> _nss_ldap_parse_gr");
stat =
_nss_ldap_assign_attrval (e, ATM (LM_GROUP, gidNumber), &gid, &buffer,
&buflen);
if (stat != NSS_SUCCESS)
{
debug ("<== _nss_ldap_parse_gr: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
gr->gr_gid =
(*gid == '\0') ? (unsigned) GID_NOBODY : (gid_t) strtoul (gid,
(char **) NULL,
10);
stat =
_nss_ldap_assign_attrval (e, ATM (LM_GROUP, cn), &gr->gr_name, &buffer,
&buflen);
if (stat != NSS_SUCCESS)
{
debug ("<== _nss_ldap_parse_gr: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
stat =
_nss_ldap_assign_userpassword (e, ATM (LM_GROUP, userPassword),
&gr->gr_passwd, &buffer, &buflen);
if (stat != NSS_SUCCESS)
{
debug ("<== _nss_ldap_parse_gr: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
if (_nss_ldap_test_config_flag (NSS_LDAP_FLAGS_RFC2307BIS))
{
groupMembers = groupMembersBuffer;
groupMembersAttrCount = 0;
groupMembersCount = 0;
groupMembersBufferSize = sizeof (groupMembersBuffer);
groupMembersBufferIsMalloced = 0;
depth = 0;
stat = do_parse_group_members (e, &groupMembers,
&groupMembersAttrCount,
&groupMembersCount,
&groupMembersBufferSize,
&groupMembersBufferIsMalloced, &buffer,
&buflen, &depth, &knownGroups, 0);
if (stat != NSS_SUCCESS)
{
if (groupMembersBufferIsMalloced)
free (groupMembers);
_nss_ldap_namelist_destroy (&knownGroups);
debug ("<== _nss_ldap_parse_gr: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
stat = do_fix_group_members_buffer (groupMembers, groupMembersCount,
&gr->gr_mem, &buffer, &buflen);
if (groupMembersBufferIsMalloced)
free (groupMembers);
_nss_ldap_namelist_destroy (&knownGroups);
}
else
{
stat =
_nss_ldap_assign_attrvals (e, ATM (LM_GROUP, memberUid), NULL,
&gr->gr_mem, &buffer, &buflen, NULL);
}
debug ("<== _nss_ldap_parse_gr: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
/*
* Add a group ID to a group list, and optionally the group IDs
* of any groups to which this group belongs (RFC2307bis nested
* group expansion is done by do_parse_initgroups_nested()).
*/
static NSS_STATUS
do_parse_initgroups (LDAPMessage * e,
ldap_state_t * pvt, void *result,
char *buffer, size_t buflen)
{
char **values;
ssize_t i;
gid_t gid;
ldap_initgroups_args_t *lia = (ldap_initgroups_args_t *) result;
debug ("==> do_parse_initgroups");
values = _nss_ldap_get_values (e, ATM (LM_GROUP, gidNumber));
if (values == NULL)
{
/* invalid group; skip it */
debug ("<== do_parse_initgroups: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
if (values[0] == NULL)
{
/* invalid group; skip it */
debug ("<== do_parse_initgroups: calls ldap_value_free and returns NSS_NOTFOUND");
ldap_value_free (values);
return NSS_NOTFOUND;
}
#ifdef HAVE_USERSEC_H
i = strlen (values[0]);
lia->grplist = realloc (lia->grplist, lia->listlen + i + 2);
if (lia->grplist == NULL)
{
debug ("<== do_parse_initgroups: calls ldap_value_free and returns NSS_TRYAGAIN");
ldap_value_free (values);
return NSS_TRYAGAIN;
}
memcpy (lia->grplist + lia->listlen, values[0], i);
lia->grplist[lia->listlen + i] = ',';
lia->listlen += i + 1;
debug ("<== do_parse_initgroups: calls ldap_value_free");
ldap_value_free (values);
#else
gid = strtoul (values[0], (char **) NULL, 10);
debug ("<== do_parse_initgroups: calls ldap_value_free");
ldap_value_free (values);
if (gid == LONG_MAX && errno == ERANGE)
{
/* invalid group, skip it */
debug ("<== do_parse_initgroups: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
# ifdef HAVE_NSSWITCH_H
/* weed out duplicates; is this really our resposibility? */
for (i = 0; i < lia->gbm->numgids; i++)
{
if (lia->gbm->gid_array[i] == (gid_t) gid)
{
debug ("<== do_parse_initgroups: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
}
if (lia->gbm->numgids == lia->gbm->maxgids)
{
/* can't fit any more */
/*
* should probably return NSS_TRYAGAIN but IIRC
* will send Solaris into an infinite loop XXX
*/
debug ("<== do_parse_initgroups: returns NSS_SUCCESS");
return NSS_SUCCESS;
}
lia->gbm->gid_array[lia->gbm->numgids++] = (gid_t) gid;
# else
if (gid == lia->group)
{
/* primary group, so skip it */
debug ("<== do_parse_initgroups: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
if (lia->limit > 0)
{
if (*(lia->start) >= lia->limit)
{
/* can't fit any more */
debug ("<== do_parse_initgroups: returns NSS_TRYAGAIN");
return NSS_TRYAGAIN;
}
}
if (*(lia->size) == 0)
{
*(lia->groups) = (gid_t *) realloc(*(lia->groups),
LDAP_NSS_NGROUPS * sizeof (gid_t));
if (*(lia->groups) == NULL)
{
debug ("<== do_parse_initgroups: returns NSS_TRYAGAIN");
return NSS_TRYAGAIN;
}
*(lia->size) = LDAP_NSS_NGROUPS;
}
if (*(lia->start) == *(lia->size))
{
/* Need a bigger buffer */
*(lia->groups) = (gid_t *) realloc (*(lia->groups),
2 * *(lia->size) * sizeof (gid_t));
if (*(lia->groups) == NULL)
{
debug ("<== do_parse_initgroups: returns NSS_TRYAGAIN");
return NSS_TRYAGAIN;
}
*(lia->size) *= 2;
}
else
{
assert(*(lia->start) < *(lia->size));
}
/* weed out duplicates; is this really our responsibility? */
for (i = 0; i < *(lia->start); i++)
{
if ((*(lia->groups))[i] == gid)
{
debug ("<== do_parse_initgroups: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
}
/* add to group list */
(*(lia->groups))[*(lia->start)] = gid;
(*(lia->start)) += 1;
# endif /* HAVE_NSSWITCH_H */
#endif /* HAVE_USERSEC_H */
debug ("<== do_parse_initgroups: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
static NSS_STATUS
do_parse_initgroups_nested (LDAPMessage * e,
ldap_state_t * pvt, void *result,
char *buffer, size_t buflen)
{
NSS_STATUS stat;
ldap_initgroups_args_t *lia = (ldap_initgroups_args_t *) result;
char **values;
char *groupdn;
debug ("==> do_parse_initgroups_nested");
stat = do_parse_initgroups (e, pvt, result, buffer, buflen);
if (stat != NSS_NOTFOUND)
{
debug ("<== do_parse_initgroups_nested: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
if (!_nss_ldap_test_config_flag (NSS_LDAP_FLAGS_RFC2307BIS))
{
debug ("<== do_parse_initgroups_nested: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
if (lia->backlink != 0)
{
/*
* Now add the GIDs of any groups of which this group is
* a member.
*/
values = _nss_ldap_get_values (e, ATM (LM_GROUP, memberOf));
if (values != NULL)
{
NSS_STATUS stat;
lia->depth++;
stat = ng_chase_backlink ((const char **)values, lia);
lia->depth--;
debug ("<== do_parse_initgroups_nested: calls ldap_value_free");
ldap_value_free (values);
debug ("<== do_parse_initgroups_nested: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
}
else
{
/*
* Now add the GIDs of any groups which refer to this group
*/
groupdn = _nss_ldap_get_dn (e);
if (groupdn != NULL)
{
NSS_STATUS stat;
lia->depth++;
stat = ng_chase (groupdn, lia);
lia->depth--;
#ifdef HAVE_LDAP_MEMFREE
debug ("<== do_parse_initgroups_nested: calls ldap_memfree");
ldap_memfree (groupdn);
#else
free (groupdn);
#endif
}
}
debug ("<== do_parse_initgroups_nested: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
static NSS_STATUS
ng_chase (const char *dn, ldap_initgroups_args_t * lia)
{
ldap_args_t a;
NSS_STATUS stat;
ent_context_t *ctx = NULL;
const char *gidnumber_attrs[2];
int erange;
debug ("==> ng_chase");
if (lia->depth > LDAP_NSS_MAXGR_DEPTH)
{
debug ("<== ns_chase: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
if (_nss_ldap_namelist_find (lia->known_groups, dn))
{
debug ("<== ns_chase: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
gidnumber_attrs[0] = ATM (LM_GROUP, gidNumber);
gidnumber_attrs[1] = NULL;
LA_INIT (a);
LA_STRING (a) = dn;
LA_TYPE (a) = LA_TYPE_STRING;
if (_nss_ldap_ent_context_init_internal_locked (&ctx) == NULL)
{
debug ("<== ns_chase: returns NSS_UNAVAIL");
return NSS_UNAVAIL;
}
stat = _nss_ldap_getent_ex (&a, &ctx, lia, NULL, 0,
&erange, _nss_ldap_filt_getgroupsbydn,
LM_GROUP, gidnumber_attrs,
do_parse_initgroups_nested);
if (stat == NSS_SUCCESS)
{
stat = _nss_ldap_namelist_push (&lia->known_groups, dn);
}
_nss_ldap_ent_context_release (&ctx);
debug ("<== ns_chase: returns %s(%d)", __nss_ldap_status2string(stat), stat);
return stat;
}
static NSS_STATUS
ng_chase_backlink (const char ** membersOf, ldap_initgroups_args_t * lia)
{
ldap_args_t a;
NSS_STATUS stat;
ent_context_t *ctx = NULL;
const char *gidnumber_attrs[3];
const char **memberP;
const char **filteredMembersOf; /* remove already traversed groups */
size_t memberCount, i;
int erange;
debug ("==> ng_chase_backlink");
if (lia->depth > LDAP_NSS_MAXGR_DEPTH)
{
debug ("<== ng_chase_backlink: returns NSS_NOTFOUND");
return NSS_NOTFOUND;
}
for (memberCount = 0; membersOf[memberCount] != NULL; memberCount++)