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/*
Unix SMB/CIFS implementation.
ads (active directory) utility library
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
/* return a ldap dn path from a string, given separators and field name
caller must free
*/
char *ads_build_path(const char *realm, const char *sep, const char *field, int reverse)
{
char *p, *r;
int numbits = 0;
char *ret;
int len;
r = strdup(realm);
if (!r || !*r) return r;
for (p=r; *p; p++) {
if (strchr(sep, *p)) numbits++;
}
len = (numbits+1)*(strlen(field)+1) + strlen(r) + 1;
ret = malloc(len);
strlcpy(ret,field, len);
p=strtok(r,sep);
strlcat(ret, p, len);
while ((p=strtok(NULL,sep))) {
char *s;
if (reverse) {
asprintf(&s, "%s%s,%s", field, p, ret);
} else {
asprintf(&s, "%s,%s%s", ret, field, p);
}
free(ret);
ret = s;
}
free(r);
return ret;
}
/* return a dn of the form "dc=AA,dc=BB,dc=CC" from a
realm of the form AA.BB.CC
caller must free
*/
char *ads_build_dn(const char *realm)
{
return ads_build_path(realm, ".", "dc=", 0);
}
#ifdef HAVE_LDAP
/*
find the ldap server from DNS
*/
static char *find_ldap_server(ADS_STRUCT *ads)
{
char *list = NULL;
struct in_addr ip;
if (ads->realm &&
strcasecmp(ads->workgroup, lp_workgroup()) == 0 &&
ldap_domain2hostlist(ads->realm, &list) == LDAP_SUCCESS) {
char *p;
p = strchr(list, ':');
if (p) *p = 0;
return list;
}
/* get desperate, find the domain controller IP */
if (resolve_name(ads->workgroup, &ip, 0x1B)) {
return strdup(inet_ntoa(ip));
}
/* or a BDC ... */
if (resolve_name(ads->workgroup, &ip, 0x1C)) {
return strdup(inet_ntoa(ip));
}
return NULL;
}
#else
static char *find_ldap_server(ADS_STRUCT *ads)
{
/* Without LDAP this doesn't make much sense */
return NULL;
}
#endif
#ifndef LDAP_PORT
#define LDAP_PORT 389
#endif
/*
initialise a ADS_STRUCT, ready for some ads_ ops
*/
ADS_STRUCT *ads_init(const char *realm,
const char *workgroup,
const char *ldap_server,
const char *bind_path,
const char *password)
{
ADS_STRUCT *ads;
ads = (ADS_STRUCT *)smb_xmalloc(sizeof(*ads));
ZERO_STRUCTP(ads);
if (!workgroup) {
workgroup = lp_workgroup();
}
ads->realm = realm? strdup(realm) : NULL;
ads->workgroup = strdup(workgroup);
ads->ldap_server = ldap_server? strdup(ldap_server) : NULL;
ads->bind_path = bind_path? strdup(bind_path) : NULL;
ads->ldap_port = LDAP_PORT;
if (password) ads->password = strdup(password);
if (!ads->realm) {
ads->realm = strdup(lp_realm());
if (!ads->realm[0]) {
SAFE_FREE(ads->realm);
}
}
if (!ads->realm && strchr_m(ads->workgroup, '.')) {
/* the smb.conf has specified the realm in 'workgroup =' */
ads->realm = strdup(ads->workgroup);
}
if (!ads->bind_path && ads->realm) {
ads->bind_path = ads_build_dn(ads->realm);
}
if (!ads->ldap_server) {
if (strcasecmp(ads->workgroup, lp_workgroup()) == 0) {
ads->ldap_server = strdup(lp_ads_server());
}
if (!ads->ldap_server || !ads->ldap_server[0]) {
SAFE_FREE(ads->ldap_server);
ads->ldap_server = find_ldap_server(ads);
}
}
if (!ads->kdc_server) {
/* assume its the same as LDAP */
ads->kdc_server = ads->ldap_server? strdup(ads->ldap_server) : NULL;
}
if (ads->ldap_server) {
/* its very useful knowing the IP of the ldap server */
ads->ldap_ip = *interpret_addr2(ads->ldap_server);
}
return ads;
}
/* a simpler ads_init() interface using all defaults */
ADS_STRUCT *ads_init_simple(void)
{
return ads_init(NULL, NULL, NULL, NULL, NULL);
}
/*
free the memory used by the ADS structure initialized with 'ads_init(...)'
*/
void ads_destroy(ADS_STRUCT **ads)
{
if (ads && *ads) {
#if HAVE_LDAP
if ((*ads)->ld) ldap_unbind((*ads)->ld);
#endif
SAFE_FREE((*ads)->realm);
SAFE_FREE((*ads)->ldap_server);
SAFE_FREE((*ads)->ldap_server_name);
SAFE_FREE((*ads)->kdc_server);
SAFE_FREE((*ads)->bind_path);
SAFE_FREE((*ads)->password);
SAFE_FREE((*ads)->user_name);
ZERO_STRUCTP(*ads);
SAFE_FREE(*ads);
}
}
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