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/*
* Copyright (C) 2008 Martin Willi
* Copyright (C) 2007 Andreas Steffen
* Hochschule fuer Technik Rapperswil
*
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* 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.
*/
#ifndef LDAP_DEPRECATED
#define LDAP_DEPRECATED 1
#endif /* LDAP_DEPRECATED */
#include <ldap.h>
#include <errno.h>
#include <library.h>
#include <debug.h>
#include "ldap_fetcher.h"
#define DEFAULT_TIMEOUT 10
typedef struct private_ldap_fetcher_t private_ldap_fetcher_t;
/**
* Private Data of a ldap_fetcher_t object.
*/
struct private_ldap_fetcher_t {
/**
* Public data
*/
ldap_fetcher_t public;
/**
* timeout to use for fetches
*/
u_int timeout;
};
/**
* Parses the result returned by an ldap query
*/
static bool parse(LDAP *ldap, LDAPMessage *result, chunk_t *response)
{
LDAPMessage *entry = ldap_first_entry(ldap, result);
bool success = FALSE;
if (entry)
{
BerElement *ber = NULL;
char *attr;
attr = ldap_first_attribute(ldap, entry, &ber);
if (attr)
{
struct berval **values = ldap_get_values_len(ldap, entry, attr);
if (values)
{
if (values[0])
{
*response = chunk_alloc(values[0]->bv_len);
memcpy(response->ptr, values[0]->bv_val, response->len);
success = TRUE;
}
else
{
DBG1("LDAP response contains no values");
}
ldap_value_free_len(values);
}
else
{
DBG1("getting LDAP values failed: %s",
ldap_err2string(ldap_result2error(ldap, entry, 0)));
}
ldap_memfree(attr);
}
else
{
DBG1("finding LDAP attributes failed: %s",
ldap_err2string(ldap_result2error(ldap, entry, 0)));
}
ber_free(ber, 0);
}
else
{
DBG1("finding first LDAP entry failed: %s",
ldap_err2string(ldap_result2error(ldap, entry, 0)));
}
return success;
}
static status_t fetch(private_ldap_fetcher_t *this, char *url,
chunk_t *result, va_list args)
{
LDAP *ldap;
LDAPURLDesc *lurl;
LDAPMessage *msg;
int res;
int ldap_version = LDAP_VERSION3;
struct timeval timeout;
status_t status = FAILED;
if (!strneq(url, "ldap", 4))
{
return NOT_SUPPORTED;
}
if (ldap_url_parse(url, &lurl) != LDAP_SUCCESS)
{
return NOT_SUPPORTED;
}
ldap = ldap_init(lurl->lud_host, lurl->lud_port);
if (ldap == NULL)
{
DBG1("LDAP initialization failed: %s", strerror(errno));
ldap_free_urldesc(lurl);
return FAILED;
}
timeout.tv_sec = this->timeout;
timeout.tv_usec = 0;
ldap_set_option(ldap, LDAP_OPT_PROTOCOL_VERSION, &ldap_version);
ldap_set_option(ldap, LDAP_OPT_NETWORK_TIMEOUT, &timeout);
DBG2("sending LDAP request to '%s'...", url);
res = ldap_simple_bind_s(ldap, NULL, NULL);
if (res == LDAP_SUCCESS)
{
res = ldap_search_st(ldap, lurl->lud_dn, lurl->lud_scope,
lurl->lud_filter, lurl->lud_attrs,
0, &timeout, &msg);
if (res == LDAP_SUCCESS)
{
if (parse(ldap, msg, result))
{
status = SUCCESS;
}
ldap_msgfree(msg);
}
else
{
DBG1("LDAP search failed: %s", ldap_err2string(res));
}
}
else
{
DBG1("LDAP bind to '%s' failed: %s", url, ldap_err2string(res));
}
ldap_unbind_s(ldap);
ldap_free_urldesc(lurl);
return status;
}
/**
* Implementation of fetcher_t.set_option.
*/
static bool set_option(private_ldap_fetcher_t *this, fetcher_option_t option, ...)
{
va_list args;
va_start(args, option);
switch (option)
{
case FETCH_TIMEOUT:
{
this->timeout = va_arg(args, u_int);
return TRUE;
}
default:
return FALSE;
}
}
/**
* Implements ldap_fetcher_t.destroy
*/
static void destroy(private_ldap_fetcher_t *this)
{
free(this);
}
/*
* Described in header.
*/
ldap_fetcher_t *ldap_fetcher_create()
{
private_ldap_fetcher_t *this = malloc_thing(private_ldap_fetcher_t);
this->public.interface.fetch = (status_t(*)(fetcher_t*,char*,chunk_t*))fetch;
this->public.interface.set_option = (bool(*)(fetcher_t*, fetcher_option_t option, ...))set_option;
this->public.interface.destroy = (void (*)(fetcher_t*))destroy;
this->timeout = DEFAULT_TIMEOUT;
return &this->public;
}
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