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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * Copyright 2000 The FreeRADIUS server project
21 * FIXME add copyrights
30 #ifdef HAVE_SYS_TYPES_H
31 #include <sys/types.h>
34 #ifdef HAVE_NETINET_IN_H
35 #include <netinet/in.h>
38 #include "libradius.h"
42 static const char rcsid[] = "$Id$";
44 #define REALM_FORMAT_PREFIX 0
45 #define REALM_FORMAT_SUFFIX 1
47 typedef struct realm_config_t {
53 static CONF_PARSER module_config[] = {
54 { "format", PW_TYPE_STRING_PTR,
55 offsetof(realm_config_t,formatstring), NULL, "suffix" },
56 { "delimiter", PW_TYPE_STRING_PTR,
57 offsetof(realm_config_t,delim), NULL, "@" },
58 { NULL, -1, 0, NULL, NULL } /* end the list */
62 * Internal function to cut down on duplicated code.
64 * Returns NULL on don't proxy, realm otherwise.
66 static REALM *check_for_realm(void *instance, REQUEST *request)
68 char namebuf[MAX_STRING_LEN];
70 char *realmname = NULL;
75 struct realm_config_t *inst = instance;
78 * If the request has a proxy entry, then it's a proxy
79 * reply, and we're walking through the module list again.
81 * In that case, don't bother trying to proxy the request
84 * Also, if there's no User-Name attribute, we can't
87 if ((request->proxy != NULL) ||
88 (request->username == NULL)) {
89 DEBUG2(" rlm_realm: Proxy reply, or no User-Name. Ignoring.");
94 * Check for 'Realm' attribute. If it exists, then we've proxied
95 * it already ( via another rlm_realm instance ) and should return.
98 if ( (vp = pairfind(request->packet->vps, PW_REALM)) != NULL ) {
99 DEBUG2(" rlm_realm: Request already proxied. Ignoring.");
104 * We will be modifing this later, so we want our own copy
107 strNcpy(namebuf, (char *)request->username->strvalue, sizeof(namebuf));
113 case REALM_FORMAT_SUFFIX:
115 /* DEBUG2(" rlm_realm: Checking for suffix after \"%c\"", inst->delim[0]); */
116 realmname = strrchr(username, inst->delim[0]);
123 case REALM_FORMAT_PREFIX:
125 /* DEBUG2(" rlm_realm: Checking for prefix before \"%c\"", inst->delim[0]); */
127 ptr = strchr(username, inst->delim[0]);
131 realmname = username;
142 * Print out excruciatingly descriptive debugging messages
143 * for the people who find it too difficult to think about
147 DEBUG2(" rlm_realm: Looking up realm \"%s\" for User-Name = \"%s\"",
148 realmname, request->username->strvalue);
150 DEBUG2(" rlm_realm: No '%c' in User-Name = \"%s\", looking up realm NULL",
151 inst->delim[0], request->username->strvalue);
157 realm = realm_find(realmname, (request->packet->code == PW_ACCOUNTING_REQUEST));
159 DEBUG2(" rlm_realm: No such realm \"%s\"",
160 (realmname == NULL) ? "NULL" : realmname);
163 DEBUG2(" rlm_realm: Found realm \"%s\"", realm->realm);
166 * If we've been told to strip the realm off, then do so.
168 if (realm->striprealm) {
170 * Create the Stripped-User-Name attribute, if it
174 if (request->username->attribute != PW_STRIPPED_USER_NAME) {
175 vp = paircreate(PW_STRIPPED_USER_NAME, PW_TYPE_STRING);
177 radlog(L_ERR|L_CONS, "no memory");
180 pairadd(&request->packet->vps, vp);
181 DEBUG2(" rlm_realm: Adding Stripped-User-Name = \"%s\"", username);
183 vp = request->username;
184 DEBUG2(" rlm_realm: Setting Stripped-User-Name = \"%s\"", username);
187 strcpy(vp->strvalue, username);
188 vp->length = strlen((char *)vp->strvalue);
189 request->username = vp;
192 DEBUG2(" rlm_realm: Proxying request from user %s to realm %s",
193 username, realm->realm);
196 * Add the realm name to the request.
198 pairadd(&request->packet->vps, pairmake("Realm", realm->realm,
200 DEBUG2(" rlm_realm: Adding Realm = \"%s\"", realm->realm);
203 * Figure out what to do with the request.
205 switch (request->packet->code) {
207 DEBUG2(" rlm_realm: Unknown packet code %d\n",
208 request->packet->code);
209 return NULL; /* don't do anything */
212 * Perhaps accounting proxying was turned off.
214 case PW_ACCOUNTING_REQUEST:
215 if (realm->acct_ipaddr == htonl(INADDR_NONE)) {
216 DEBUG2(" rlm_realm: Accounting realm is LOCAL.");
220 if (realm->acct_port == 0) {
221 DEBUG2(" rlm_realm: acct_port is not set. Proxy cancelled.");
227 * Perhaps authentication proxying was turned off.
229 case PW_AUTHENTICATION_REQUEST:
230 if (realm->ipaddr == htonl(INADDR_NONE)) {
231 DEBUG2(" rlm_realm: Authentication realm is LOCAL.");
235 if (realm->auth_port == 0) {
236 DEBUG2(" rlm_realm: auth_port is not set. Proxy cancelled.");
243 * If this request has arrived from another freeradius server
244 * that has already proxied the request, we don't need to do
247 for (vp = request->packet->vps; vp; vp = vp->next) {
248 if (vp->attribute == PW_FREERADIUS_PROXIED_TO) {
249 if (request->packet->code == PW_AUTHENTICATION_REQUEST &&
250 vp->lvalue == realm->ipaddr) {
251 DEBUG2(" rlm_realm: Request not proxied due to Freeradius-Proxied-To");
254 if (request->packet->code == PW_ACCOUNTING_REQUEST &&
255 vp->lvalue == realm->acct_ipaddr) {
256 DEBUG2(" rlm_realm: Request not proxied due to Freeradius-Proxied-To");
266 * Add a "Proxy-To-Realm" attribute to the request.
268 static void add_proxy_to_realm(VALUE_PAIR **vps, REALM *realm)
273 * Tell the server to proxy this request to another
276 vp = pairmake("Proxy-To-Realm", realm->realm, T_OP_EQ);
278 radlog(L_ERR|L_CONS, "no memory");
283 * Add it, even if it's already present.
289 * Perform the realm module instantiation. Configuration info is
290 * stored in *instance for later use.
293 static int realm_instantiate(CONF_SECTION *conf, void **instance)
295 struct realm_config_t *inst;
297 /* setup a storage area for instance data */
298 inst = rad_malloc(sizeof(*inst));
302 memset(inst, 0, sizeof(*inst));
304 if(cf_section_parse(conf, inst, module_config) < 0) {
309 if(strcasecmp(inst->formatstring, "suffix") == 0) {
310 inst->format = REALM_FORMAT_SUFFIX;
311 } else if(strcasecmp(inst->formatstring, "prefix") == 0) {
312 inst->format = REALM_FORMAT_PREFIX;
314 radlog(L_ERR, "Bad value \"%s\" for realm format value", inst->formatstring);
318 free(inst->formatstring);
319 if(strlen(inst->delim) != 1) {
320 radlog(L_ERR, "Bad value \"%s\" for realm delimiter value", inst->delim);
335 * Examine a request for a username with an realm, and if it
336 * corresponds to something in the realms file, set that realm as
339 * This should very nearly duplicate the old proxy_send() code
341 static int realm_authorize(void *instance, REQUEST *request)
346 * Check if we've got to proxy the request.
347 * If not, return without adding a Proxy-To-Realm
350 realm = check_for_realm(instance, request);
352 return RLM_MODULE_NOOP;
356 * Maybe add a Proxy-To-Realm attribute to the request.
358 DEBUG2(" rlm_realm: Preparing to proxy authentication request to realm \"%s\"\n",
360 add_proxy_to_realm(&request->config_items, realm);
362 return RLM_MODULE_UPDATED; /* try the next module */
366 * This does the exact same thing as the realm_authorize, it's just called
369 static int realm_preacct(void *instance, REQUEST *request)
371 const char *name = (char *)request->username->strvalue;
375 return RLM_MODULE_OK;
379 * Check if we've got to proxy the request.
380 * If not, return without adding a Proxy-To-Realm
383 realm = check_for_realm(instance, request);
385 return RLM_MODULE_NOOP;
390 * Maybe add a Proxy-To-Realm attribute to the request.
392 DEBUG2(" rlm_realm: Preparing to proxy accounting request to realm \"%s\"\n",
394 add_proxy_to_realm(&request->config_items, realm);
396 return RLM_MODULE_UPDATED; /* try the next module */
399 static int realm_detach(void *instance)
401 struct realm_config_t *inst = instance;
407 /* globally exported name */
408 module_t rlm_realm = {
410 0, /* type: reserved */
411 NULL, /* initialization */
412 realm_instantiate, /* instantiation */
414 NULL, /* authentication */
415 realm_authorize, /* authorization */
416 realm_preacct, /* preaccounting */
417 NULL, /* accounting */
418 NULL, /* checksimul */
419 NULL, /* pre-proxy */
420 NULL, /* post-proxy */
423 realm_detach, /* detach */