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/*
bsdnss.c - BSD NSS functions
This file was part of the nss-pam-ldapd FreeBSD port and part of the
nss_ldap FreeBSD port before that.
Copyright (C) 2003 Jacques Vidrine
Copyright (C) 2006 Artem Kazakov
Copyright (C) 2009 Alexander V. Chernikov
Copyright (C) 2011-2016 Arthur de Jong
Copyright (C) 2011 Tom Judge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#include "config.h"
#include <errno.h>
#include <sys/param.h>
#include <netinet/in.h>
#include "prototypes.h"
#include "common.h"
#include "compat/attrs.h"
#define BUFFER_SIZE 1024
NSS_METHOD_PROTOTYPE(__nss_compat_getgrnam_r);
NSS_METHOD_PROTOTYPE(__nss_compat_getgrgid_r);
NSS_METHOD_PROTOTYPE(__nss_compat_getgrent_r);
NSS_METHOD_PROTOTYPE(__nss_compat_setgrent);
NSS_METHOD_PROTOTYPE(__nss_compat_endgrent);
NSS_METHOD_PROTOTYPE(__freebsd_getgroupmembership);
NSS_METHOD_PROTOTYPE(__nss_compat_getpwnam_r);
NSS_METHOD_PROTOTYPE(__nss_compat_getpwuid_r);
NSS_METHOD_PROTOTYPE(__nss_compat_getpwent_r);
NSS_METHOD_PROTOTYPE(__nss_compat_setpwent);
NSS_METHOD_PROTOTYPE(__nss_compat_endpwent);
NSS_METHOD_PROTOTYPE(__nss_compat_gethostbyname);
NSS_METHOD_PROTOTYPE(__nss_compat_gethostbyname2);
NSS_METHOD_PROTOTYPE(__nss_compat_gethostbyaddr);
static ns_mtab methods[] = {
{ NSDB_GROUP, "getgrnam_r", __nss_compat_getgrnam_r, (void *)NSS_NAME(getgrnam_r) },
{ NSDB_GROUP, "getgrgid_r", __nss_compat_getgrgid_r, (void *)NSS_NAME(getgrgid_r) },
{ NSDB_GROUP, "getgrent_r", __nss_compat_getgrent_r, (void *)NSS_NAME(getgrent_r) },
{ NSDB_GROUP, "setgrent", __nss_compat_setgrent, (void *)NSS_NAME(setgrent) },
{ NSDB_GROUP, "endgrent", __nss_compat_endgrent, (void *)NSS_NAME(endgrent) },
{ NSDB_GROUP, "getgroupmembership", __freebsd_getgroupmembership, NULL },
{ NSDB_PASSWD, "getpwnam_r", __nss_compat_getpwnam_r, (void *)NSS_NAME(getpwnam_r) },
{ NSDB_PASSWD, "getpwuid_r", __nss_compat_getpwuid_r, (void *)NSS_NAME(getpwuid_r) },
{ NSDB_PASSWD, "getpwent_r", __nss_compat_getpwent_r, (void *)NSS_NAME(getpwent_r) },
{ NSDB_PASSWD, "setpwent", __nss_compat_setpwent, (void *)NSS_NAME(setpwent) },
{ NSDB_PASSWD, "endpwent", __nss_compat_endpwent, (void *)NSS_NAME(endpwent) },
{ NSDB_HOSTS, "gethostbyname", __nss_compat_gethostbyname, (void *)NSS_NAME(gethostbyname_r) },
{ NSDB_HOSTS, "gethostbyaddr", __nss_compat_gethostbyaddr, (void *)NSS_NAME(gethostbyaddr_r) },
{ NSDB_HOSTS, "gethostbyname2", __nss_compat_gethostbyname2, (void *)NSS_NAME(gethostbyname2_r) },
{ NSDB_GROUP_COMPAT, "getgrnam_r", __nss_compat_getgrnam_r, (void *)NSS_NAME(getgrnam_r) },
{ NSDB_GROUP_COMPAT, "getgrgid_r", __nss_compat_getgrgid_r, (void *)NSS_NAME(getgrgid_r) },
{ NSDB_GROUP_COMPAT, "getgrent_r", __nss_compat_getgrent_r, (void *)NSS_NAME(getgrent_r) },
{ NSDB_GROUP_COMPAT, "setgrent", __nss_compat_setgrent, (void *)NSS_NAME(setgrent) },
{ NSDB_GROUP_COMPAT, "endgrent", __nss_compat_endgrent, (void *)NSS_NAME(endgrent) },
{ NSDB_PASSWD_COMPAT, "getpwnam_r", __nss_compat_getpwnam_r, (void *)NSS_NAME(getpwnam_r) },
{ NSDB_PASSWD_COMPAT, "getpwuid_r", __nss_compat_getpwuid_r, (void *)NSS_NAME(getpwuid_r) },
{ NSDB_PASSWD_COMPAT, "getpwent_r", __nss_compat_getpwent_r, (void *)NSS_NAME(getpwent_r) },
{ NSDB_PASSWD_COMPAT, "setpwent", __nss_compat_setpwent, (void *)NSS_NAME(setpwent) },
{ NSDB_PASSWD_COMPAT, "endpwent", __nss_compat_endpwent, (void *)NSS_NAME(endpwent) },
};
typedef nss_status_t (*gethbn_t)(const char *, struct hostent *, char *, size_t, int *, int *);
typedef nss_status_t (*gethba_t)(struct in_addr *, int, int, struct hostent *, char *, size_t, int *, int *);
int __nss_compat_gethostbyname(void UNUSED(*retval), void *mdata, va_list ap)
{
gethbn_t fn;
const char *name;
struct hostent *result;
char buffer[BUFFER_SIZE];
int errnop;
int h_errnop;
int af;
nss_status_t status;
fn = (gethbn_t)mdata;
name = va_arg(ap, const char *);
af = va_arg(ap, int);
result = va_arg(ap, struct hostent *);
status = fn(name, result, buffer, sizeof(buffer), &errnop, &h_errnop);
status = __nss_compat_result(status, errnop);
h_errno = h_errnop;
return status;
}
int __nss_compat_gethostbyname2(void UNUSED(*retval), void *mdata, va_list ap)
{
gethbn_t fn;
const char *name;
struct hostent *result;
char buffer[BUFFER_SIZE];
int errnop;
int h_errnop;
int af;
nss_status_t status;
fn = (gethbn_t)mdata;
name = va_arg(ap, const char *);
af = va_arg(ap, int);
result = va_arg(ap, struct hostent *);
status = fn(name, result, buffer, sizeof(buffer), &errnop, &h_errnop);
status = __nss_compat_result(status, errnop);
h_errno = h_errnop;
return status;
}
int __nss_compat_gethostbyaddr(void UNUSED(*retval), void *mdata, va_list ap)
{
gethba_t fn;
struct in_addr *addr;
int len;
int type;
struct hostent *result;
char buffer[BUFFER_SIZE];
int errnop;
int h_errnop;
nss_status_t status;
fn = (gethba_t)mdata;
addr = va_arg(ap, struct in_addr *);
len = va_arg(ap, int);
type = va_arg(ap, int);
result = va_arg(ap, struct hostent *);
status = fn(addr, len, type, result, buffer, sizeof(buffer), &errnop, &h_errnop);
status = __nss_compat_result(status, errnop);
h_errno = h_errnop;
return status;
}
static int __gr_addgid(gid_t gid, gid_t *groups, int maxgrp, int *groupc)
{
int ret, dupc;
/* skip duplicates */
for (dupc = 0; dupc < MIN(maxgrp, *groupc); dupc++)
{
if (groups[dupc] == gid)
return 1;
}
ret = 1;
if (*groupc < maxgrp) /* add this gid */
groups[*groupc] = gid;
else
ret = 0;
(*groupc)++;
return ret;
}
int __freebsd_getgroupmembership(void UNUSED(*retval), void UNUSED(*mdata_),
va_list ap)
{
int err;
nss_status_t s;
gid_t group;
gid_t *tmpgroups;
const char *user;
gid_t *groups;
int maxgrp, *grpcnt;
int i;
long int lstart, lsize;
user = va_arg(ap, const char *);
group = va_arg(ap, gid_t);
groups = va_arg(ap, gid_t *);
maxgrp = va_arg(ap, int);
grpcnt = va_arg(ap, int *);
tmpgroups = malloc(maxgrp * sizeof(gid_t));
if (tmpgroups == NULL)
return NSS_STATUS_UNAVAIL;
/* insert primary membership */
__gr_addgid(group, groups, maxgrp, grpcnt);
lstart = 0;
lsize = maxgrp;
s = NSS_NAME(initgroups_dyn)(user, group, &lstart, &lsize, &tmpgroups, 0, &err);
if (s == NSS_STATUS_SUCCESS)
{
for (i = 0; i < lstart; i++)
__gr_addgid(tmpgroups[i], groups, maxgrp, grpcnt);
s = NSS_STATUS_NOTFOUND;
}
free(tmpgroups);
return __nss_compat_result(s, 0);
}
ns_mtab *nss_module_register(const char UNUSED(*source), unsigned int *mtabsize,
nss_module_unregister_fn *unreg)
{
*mtabsize = sizeof(methods) / sizeof(methods[0]);
*unreg = NULL;
return methods;
}
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