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/*
* paircmp.c Valuepair functions for various attributes
*
* Version: $Id$
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* Copyright 2000,2006 The FreeRADIUS server project
* Copyright 2000 Alan DeKok <aland@ox.org>
*/
RCSID("$Id$")
#include <freeradius-devel/radiusd.h>
#include <freeradius-devel/rad_assert.h>
#include "rlm_expr.h"
/*
* Compare prefix/suffix.
*
* If they compare:
* - if PW_STRIP_USER_NAME is present in check_pairs,
* strip the username of prefix/suffix.
* - if PW_STRIP_USER_NAME is not present in check_pairs,
* add a PW_STRIPPED_USER_NAME to the request.
*/
static int presufcmp(UNUSED void *instance,
REQUEST *request,
UNUSED VALUE_PAIR *req,
VALUE_PAIR *check,
VALUE_PAIR *check_pairs,
UNUSED VALUE_PAIR **reply_pairs)
{
VALUE_PAIR *vp;
char const *name;
char rest[MAX_STRING_LEN];
int len, namelen;
int ret = -1;
if (!request->username) {
return -1;
}
VERIFY_VP(request->username);
VERIFY_VP(check);
rad_assert(request->username->da->type == PW_TYPE_STRING);
name = request->username->vp_strvalue;
#if 0 /* DEBUG */
printf("Comparing %s and %s, check->attr is %d\n", name, check->vp_strvalue, check->attribute);
#endif
len = strlen(check->vp_strvalue);
if (check->da->vendor == 0) switch (check->da->attr) {
case PW_PREFIX:
ret = strncmp(name, check->vp_strvalue, len);
if (ret == 0)
strlcpy(rest, name + len, sizeof(rest));
break;
case PW_SUFFIX:
namelen = strlen(name);
if (namelen < len)
break;
ret = strcmp(name + namelen - len,
check->vp_strvalue);
if (ret == 0) {
strlcpy(rest, name, namelen - len + 1);
}
break;
}
if (ret != 0) {
return ret;
}
/*
* If Strip-User-Name == No, then don't do any more.
*/
vp = fr_pair_find_by_num(check_pairs, PW_STRIP_USER_NAME, 0, TAG_ANY);
if (vp && !vp->vp_integer) return ret;
/*
* See where to put the stripped user name.
*/
vp = fr_pair_find_by_num(check_pairs, PW_STRIPPED_USER_NAME, 0, TAG_ANY);
if (!vp) {
vp = radius_pair_create(request->packet, &request->packet->vps, PW_STRIPPED_USER_NAME, 0);
if (!vp) return ret;
request->username = vp;
}
fr_pair_value_strcpy(vp, rest);
return ret;
}
/*
* Compare the request packet type.
*/
static int packetcmp(UNUSED void *instance,
REQUEST *request,
UNUSED VALUE_PAIR *req,
VALUE_PAIR *check,
UNUSED VALUE_PAIR *check_pairs,
UNUSED VALUE_PAIR **reply_pairs)
{
if (request->packet->code == check->vp_integer) {
return 0;
}
return 1;
}
/*
* Compare the response packet type.
*/
static int responsecmp(UNUSED void *instance,
REQUEST *request,
UNUSED VALUE_PAIR *req,
VALUE_PAIR *check,
UNUSED VALUE_PAIR *check_pairs,
UNUSED VALUE_PAIR **reply_pairs)
{
if (request->reply->code == check->vp_integer) {
return 0;
}
return 1;
}
/*
* Generic comparisons, via xlat.
*/
static int genericcmp(UNUSED void *instance,
REQUEST *request,
VALUE_PAIR *req,
VALUE_PAIR *check,
UNUSED VALUE_PAIR *check_pairs,
UNUSED VALUE_PAIR **reply_pairs)
{
if ((check->op != T_OP_REG_EQ) &&
(check->op != T_OP_REG_NE)) {
int rcode;
char name[1024];
char value[1024];
VALUE_PAIR *vp;
snprintf(name, sizeof(name), "%%{%s}", check->da->name);
if (radius_xlat(value, sizeof(value), request, name, NULL, NULL) < 0) {
return 0;
}
vp = fr_pair_make(req, NULL, check->da->name, value, check->op);
/*
* Paircmp returns 0 for failed comparison,
* 1 for succeeded.
*/
rcode = fr_pair_cmp(check, vp);
/*
* We're being called from radius_callback_compare,
* which wants 0 for success, and 1 for fail (sigh)
*
* We should really fix the API so that it is
* consistent. i.e. the comparison callbacks should
* return ONLY the resut of comparing A to B.
* The radius_callback_cmp function should then
* take care of using the operator to see if the
* condition (A OP B) is true or not.
*
* This would also allow "<", etc. to work in the
* callback functions...
*
* See rlm_ldap, ...groupcmp() for something that
* returns 0 for matched, and 1 for didn't match.
*/
rcode = !rcode;
fr_pair_list_free(&vp);
return rcode;
}
/*
* Will do the xlat for us
*/
return radius_compare_vps(request, check, req);
}
static int generic_attrs[] = {
PW_CLIENT_IP_ADDRESS,
PW_PACKET_SRC_IP_ADDRESS,
PW_PACKET_DST_IP_ADDRESS,
PW_PACKET_SRC_PORT,
PW_PACKET_DST_PORT,
PW_REQUEST_PROCESSING_STAGE,
PW_PACKET_SRC_IPV6_ADDRESS,
PW_PACKET_DST_IPV6_ADDRESS,
PW_VIRTUAL_SERVER,
0
};
/*
* Register server-builtin special attributes.
*/
void pair_builtincompare_add(void *instance)
{
int i;
paircompare_register(dict_attrbyvalue(PW_PREFIX, 0), dict_attrbyvalue(PW_USER_NAME, 0), false, presufcmp, instance);
paircompare_register(dict_attrbyvalue(PW_SUFFIX, 0), dict_attrbyvalue(PW_USER_NAME, 0), false, presufcmp, instance);
paircompare_register(dict_attrbyvalue(PW_PACKET_TYPE, 0), NULL, true, packetcmp, instance);
paircompare_register(dict_attrbyvalue(PW_RESPONSE_PACKET_TYPE, 0), NULL, true, responsecmp, instance);
for (i = 0; generic_attrs[i] != 0; i++) {
paircompare_register(dict_attrbyvalue(generic_attrs[i], 0), NULL, true, genericcmp, instance);
}
}
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