6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2003,2006 The FreeRADIUS server project
21 * Copyright 2003 Kostas Kalevras <kkalev@noc.ntua.gr>
24 #include <freeradius-devel/ident.h>
27 #include <freeradius-devel/autoconf.h>
33 #include <freeradius-devel/radiusd.h>
34 #include <freeradius-devel/modules.h>
39 #define REG_EXTENDED (0)
46 * Define a structure for our module configuration.
48 * These variables do not need to be in a structure, but it's
49 * a lot cleaner to do so, and a pointer to the structure can
50 * be used as the instance handle.
52 typedef struct rlm_checkval_t {
53 char *item_name; /* The attribute inside Access-Request ie Calling-Station-Id */
54 char *check_name; /* The attribute to check it with ie Allowed-Calling-Station-Id */
55 char *data_type; /* string,integer,ipaddr,date,abinary,octets */
59 int notfound_reject; /* If we don't find the item_name in the request send back a reject */
63 * A mapping of configuration file names to internal variables.
65 * Note that the string is dynamically allocated, so it MUST
66 * be freed. When the configuration file parse re-reads the string,
67 * it free's the old one, and strdup's the new one, placing the pointer
68 * to the strdup'd string into 'config.string'. This gets around
71 static const CONF_PARSER module_config[] = {
72 { "item-name", PW_TYPE_STRING_PTR, offsetof(rlm_checkval_t,item_name), NULL, NULL},
73 { "check-name", PW_TYPE_STRING_PTR, offsetof(rlm_checkval_t,check_name), NULL, NULL},
74 { "data-type", PW_TYPE_STRING_PTR, offsetof(rlm_checkval_t,data_type),NULL, "integer"},
75 { "notfound-reject", PW_TYPE_BOOLEAN, offsetof(rlm_checkval_t,notfound_reject),NULL, "no"},
76 { NULL, -1, 0, NULL, NULL } /* end the list */
80 static int checkval_detach(void *instance)
82 rlm_checkval_t *data = (rlm_checkval_t *) instance;
89 * Do any per-module initialization that is separate to each
90 * configured instance of the module. e.g. set up connections
91 * to external databases, read configuration files, set up
92 * dictionary entries, etc.
94 * If configuration information is given in the config section
95 * that must be referenced in later calls, store a handle to it
96 * in *instance otherwise put a null pointer there.
98 static int checkval_instantiate(CONF_SECTION *conf, void **instance)
100 rlm_checkval_t *data;
104 static const LRAD_NAME_NUMBER names[] = {
105 { "string", PW_TYPE_STRING },
106 { "integer", PW_TYPE_INTEGER },
107 { "ipaddr", PW_TYPE_IPADDR },
108 { "date", PW_TYPE_DATE },
109 { "abinary", PW_TYPE_OCTETS },
110 { "octets", PW_TYPE_OCTETS },
111 { "binary", PW_TYPE_OCTETS },
116 * Set up a storage area for instance data
118 data = rad_malloc(sizeof(*data));
122 memset(data, 0, sizeof(*data));
125 * If the configuration parameters can't be parsed, then
128 if (cf_section_parse(conf, data, module_config) < 0) {
129 checkval_detach(data);
134 * Check if data_type exists
136 if (!data->data_type || !strlen(data->data_type)){
137 radlog(L_ERR, "rlm_checkval: Data type not defined");
138 checkval_detach(data);
141 if (!data->item_name || !strlen(data->item_name)){
142 radlog(L_ERR, "rlm_checkval: Item name not defined");
143 checkval_detach(data);
146 if (!data->check_name || !strlen(data->check_name)){
147 radlog(L_ERR, "rlm_checkval: Check item name not defined");
148 checkval_detach(data);
153 * Discover the attribute number of the item name
155 dattr = dict_attrbyname(data->item_name);
157 radlog(L_ERR, "rlm_checkval: No such attribute %s",
159 checkval_detach(data);
162 data->item_attr = dattr->attr;
165 * Add the check attribute name to the dictionary
166 * if it does not already exists. dict_addattr() handles that
169 memset(&flags, 0, sizeof(flags));
170 dict_addattr(data->check_name, 0, PW_TYPE_STRING, -1,flags);
171 dattr = dict_attrbyname(data->check_name);
173 radlog(L_ERR, "rlm_checkval: No such attribute %s",
175 checkval_detach(data);
178 data->chk_attr = dattr->attr;
179 DEBUG2("rlm_checkval: Registered name %s for attribute %d",
180 dattr->name,dattr->attr);
183 * Convert the string type to an integer type,
184 * so we don't have to do string comparisons on each
187 data->dat_type = lrad_str2int(names, data->data_type, -1);
188 if (data->dat_type < 0) {
189 radlog(L_ERR, "rlm_checkval: Data type %s in not known",data->data_type);
190 checkval_detach(data);
199 static int do_checkval(void *instance, REQUEST *request)
201 rlm_checkval_t *data = (rlm_checkval_t *) instance;
202 int ret=RLM_MODULE_NOOP;
203 VALUE_PAIR *chk_vp, *item_vp;
207 /* quiet the compiler */
213 * Look for the check item
216 if (!(item_vp = pairfind(request->packet->vps, data->item_attr))){
217 DEBUG2("rlm_checkval: Could not find item named %s in request", data->item_name);
218 if (data->notfound_reject)
219 ret = RLM_MODULE_REJECT;
221 ret = RLM_MODULE_NOTFOUND;
224 DEBUG2("rlm_checkval: Item Name: %s, Value: %s",data->item_name, item_vp->vp_strvalue);
225 tmp = request->config_items;
227 if (!(chk_vp = pairfind(tmp, data->chk_attr))){
229 DEBUG2("rlm_checkval: Could not find attribute named %s in check pairs",data->check_name);
230 ret = RLM_MODULE_NOTFOUND;
236 DEBUG2("rlm_checkval: Value Name: %s, Value: %s",data->check_name, chk_vp->vp_strvalue);
239 * Check if item != check
242 if (data->dat_type == PW_TYPE_STRING ||
243 data->dat_type == PW_TYPE_OCTETS) {
244 if (item_vp->length != chk_vp->length)
245 ret = RLM_MODULE_REJECT;
247 if (!memcmp(item_vp->vp_strvalue,
249 (size_t) chk_vp->length))
252 ret = RLM_MODULE_REJECT;
255 else{ /* Integer or Date */
257 if (item_vp->lvalue == chk_vp->lvalue)
260 ret = RLM_MODULE_REJECT;
263 if (ret == RLM_MODULE_REJECT &&
264 chk_vp->operator == T_OP_REG_EQ) {
267 char err_msg[MAX_STRING_LEN];
269 DEBUG("rlm_checkval: Doing regex");
270 err = regcomp(®, (char *)chk_vp->vp_strvalue, REG_EXTENDED|REG_NOSUB);
272 regerror(err, ®,err_msg, MAX_STRING_LEN);
273 DEBUG("rlm_checkval: regcomp() returned error: %s", err_msg);
274 return RLM_MODULE_FAIL;
276 if (regexec(®, (char *)item_vp->vp_strvalue,0, NULL, 0) == 0)
279 ret = RLM_MODULE_REJECT;
284 } while (ret == RLM_MODULE_REJECT &&
287 if (ret == RLM_MODULE_REJECT) {
288 if (!item_vp && data->notfound_reject){
289 char module_fmsg[MAX_STRING_LEN];
290 VALUE_PAIR *module_fmsg_vp;
292 snprintf(module_fmsg,sizeof(module_fmsg),
293 "rlm_checkval: Could not find item named %s in request", data->item_name);
294 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
295 pairadd(&request->packet->vps, module_fmsg_vp);
298 char module_fmsg[MAX_STRING_LEN];
299 VALUE_PAIR *module_fmsg_vp;
301 snprintf(module_fmsg,sizeof(module_fmsg),
302 "rlm_checkval: This %s is not allowed for the user", data->item_name);
303 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
304 pairadd(&request->packet->vps, module_fmsg_vp);
314 static int checkval_authorize(void *instance, REQUEST *request)
316 return do_checkval(instance,request);
319 static int checkval_accounting(void *instance, REQUEST *request)
321 return do_checkval(instance,request);
325 * The module name should be the only globally exported symbol.
326 * That is, everything else should be 'static'.
328 * If the module needs to temporarily modify it's instantiation
329 * data, the type should be changed to RLM_TYPE_THREAD_UNSAFE.
330 * The server will then take care of ensuring that the module
331 * is single-threaded.
333 module_t rlm_checkval = {
337 checkval_instantiate, /* instantiation */
338 checkval_detach, /* detach */
340 NULL, /* authentication */
341 checkval_authorize, /* authorization */
342 NULL, /* preaccounting */
343 checkval_accounting, /* accounting */
344 NULL, /* checksimul */
345 NULL, /* pre-proxy */
346 NULL, /* post-proxy */