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 2001,2006 The FreeRADIUS server project
21 * Copyright 2002 Kostas Kalevras <kkalev@noc.ntua.gr>
23 * March 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
25 * April 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
26 * - Add support for the Pool-Name attribute
27 * May 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
28 * - Check the return value of a gdbm_fetch() we didn't check
29 * - Change the nas entry in the ippool_key structure from uint32 to string[64]
30 * That should allow us to also use the NAS-Identifier attribute
31 * Sep 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
32 * - Move from authorize to post-auth
33 * - Use mutex locks when accessing the gdbm files
34 * - Fail if we don't find nas port information
35 * Oct 2002, Kostas Kalevras <kkalev@noc.ntua.gr>
36 * - Do a memset(0) on the key.nas before doing searches. Nusty bug
37 * Jul 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
38 * - Make Multilink work this time
39 * - Instead of locking file operations, lock transactions. That means we only keep
40 * one big transaction lock instead of per file locks (mutexes).
41 * Sep 2003, Kostas Kalevras <kkalev@noc.ntua.gr>
42 * - Fix postauth to not leak ip's
43 * Add an extra attribute in each entry <char extra> signifying if we need to delete this
44 * entry in the accounting phase. This is only true in case we are doing MPPP
45 * Various other code changes. Code comments should explain things
46 * Highly experimental at this phase.
47 * Mar 2004, Kostas Kalevras <kkalev@noc.ntua.gr>
48 * - Add a timestamp and a timeout attribute in ippool_info. When we assign an ip we set timestamp
49 * to request->timestamp and timeout to %{Session-Timeout:-0}. When we search for a free entry
50 * we check if timeout has expired. If it has then we free the entry. We also add a maximum
51 * timeout configuration directive. If it is non zero then we also use that one to free entries.
52 * Jul 2004, Kostas Kalevras <kkalev@noc.ntua.gr>
53 * - If Pool-Name is set to DEFAULT then always run.
54 * Mar 2005, Kostas Kalevras <kkalev@noc.ntua.gr>
55 * - Make the key an MD5 of a configurable xlated string. This closes Bug #42
58 #include <freeradius-devel/ident.h>
61 #include <freeradius-devel/radiusd.h>
62 #include <freeradius-devel/modules.h>
67 #include "../../include/md5.h"
71 #ifdef NEEDS_GDBM_SYNC
72 # define GDBM_SYNCOPT GDBM_SYNC
74 # define GDBM_SYNCOPT 0
78 #define GDBM_IPPOOL_OPTS (GDBM_SYNCOPT | GDBM_NOLOCK)
80 #define GDBM_IPPOOL_OPTS (GDBM_SYNCOPT)
83 #define MAX_NAS_NAME_SIZE 64
86 * Define a structure for our module configuration.
88 * These variables do not need to be in a structure, but it's
89 * a lot cleaner to do so, and a pointer to the structure can
90 * be used as the instance handle.
92 typedef struct rlm_ippool_t {
105 #ifdef HAVE_PTHREAD_H
106 pthread_mutex_t op_mutex;
110 #ifndef HAVE_PTHREAD_H
112 * This is easier than ifdef's throughout the code.
114 #define pthread_mutex_init(_x, _y)
115 #define pthread_mutex_destroy(_x)
116 #define pthread_mutex_lock(_x)
117 #define pthread_mutex_unlock(_x)
120 typedef struct ippool_info {
129 typedef struct ippool_key {
134 * A mapping of configuration file names to internal variables.
136 * Note that the string is dynamically allocated, so it MUST
137 * be freed. When the configuration file parse re-reads the string,
138 * it free's the old one, and strdup's the new one, placing the pointer
139 * to the strdup'd string into 'config.string'. This gets around
142 static const CONF_PARSER module_config[] = {
143 { "session-db", PW_TYPE_STRING_PTR, offsetof(rlm_ippool_t,session_db), NULL, NULL },
144 { "ip-index", PW_TYPE_STRING_PTR, offsetof(rlm_ippool_t,ip_index), NULL, NULL },
145 { "key", PW_TYPE_STRING_PTR, offsetof(rlm_ippool_t,key), NULL, "%{NAS-IP-Address} %{NAS-Port}" },
146 { "range-start", PW_TYPE_IPADDR, offsetof(rlm_ippool_t,range_start), NULL, "0" },
147 { "range-stop", PW_TYPE_IPADDR, offsetof(rlm_ippool_t,range_stop), NULL, "0" },
148 { "netmask", PW_TYPE_IPADDR, offsetof(rlm_ippool_t,netmask), NULL, "0" },
149 { "cache-size", PW_TYPE_INTEGER, offsetof(rlm_ippool_t,cache_size), NULL, "1000" },
150 { "override", PW_TYPE_BOOLEAN, offsetof(rlm_ippool_t,override), NULL, "no" },
151 { "maximum-timeout", PW_TYPE_INTEGER, offsetof(rlm_ippool_t,max_timeout), NULL, "0" },
152 { NULL, -1, 0, NULL, NULL }
156 * Do any per-module initialization that is separate to each
157 * configured instance of the module. e.g. set up connections
158 * to external databases, read configuration files, set up
159 * dictionary entries, etc.
161 * If configuration information is given in the config section
162 * that must be referenced in later calls, store a handle to it
163 * in *instance otherwise put a null pointer there.
165 static int ippool_instantiate(CONF_SECTION *conf, void **instance)
175 const char *cli = "0";
176 char *pool_name = NULL;
179 * Set up a storage area for instance data
181 data = rad_malloc(sizeof(*data));
185 memset(data, 0, sizeof(*data));
188 * If the configuration parameters can't be parsed, then
191 if (cf_section_parse(conf, data, module_config) < 0) {
195 cache_size = data->cache_size;
197 if (data->session_db == NULL) {
198 radlog(L_ERR, "rlm_ippool: 'session-db' must be set.");
202 if (data->ip_index == NULL) {
203 radlog(L_ERR, "rlm_ippool: 'ip-index' must be set.");
207 data->range_start = htonl(data->range_start);
208 data->range_stop = htonl(data->range_stop);
209 data->netmask = htonl(data->netmask);
210 if (data->range_start == 0 || data->range_stop == 0 || \
211 data->range_start >= data->range_stop ) {
212 radlog(L_ERR, "rlm_ippool: Invalid configuration data given.");
217 data->gdbm = gdbm_open(data->session_db, sizeof(int),
218 GDBM_WRCREAT | GDBM_IPPOOL_OPTS, 0600, NULL);
219 if (data->gdbm == NULL) {
220 radlog(L_ERR, "rlm_ippool: Failed to open file %s: %s",
221 data->session_db, strerror(errno));
224 data->ip = gdbm_open(data->ip_index, sizeof(int),
225 GDBM_WRCREAT | GDBM_IPPOOL_OPTS, 0600, NULL);
226 if (data->ip == NULL) {
227 radlog(L_ERR, "rlm_ippool: Failed to open file %s: %s",
228 data->ip_index, strerror(errno));
231 if (gdbm_setopt(data->gdbm, GDBM_CACHESIZE, &cache_size, sizeof(int)) == -1)
232 radlog(L_ERR, "rlm_ippool: Failed to set cache size");
233 if (gdbm_setopt(data->ip, GDBM_CACHESIZE, &cache_size, sizeof(int)) == -1)
234 radlog(L_ERR, "rlm_ippool: Failed to set cache size");
236 key_datum = gdbm_firstkey(data->gdbm);
237 if (key_datum.dptr == NULL){
239 * If the database does not exist initialize it.
240 * We set the nas/port pairs to not existent values and
248 DEBUG("rlm_ippool: Initializing database");
249 for(i=data->range_start,j=~0;i<=data->range_stop;i++,j--){
252 * Net and Broadcast addresses are excluded
254 or_result = i | data->netmask;
255 if (~data->netmask != 0 &&
256 (or_result == data->netmask ||
257 (~or_result == 0))) {
258 DEBUG("rlm_ippool: IP %s excluded",
259 ip_ntoa(str, ntohl(i)));
263 sprintf(init_str,"%016d",j);
264 DEBUG("rlm_ippool: Initialized bucket: %s",init_str);
265 memcpy(key.key, init_str,16);
266 key_datum.dptr = (char *) &key;
267 key_datum.dsize = sizeof(ippool_key);
269 entry.ipaddr = ntohl(i);
274 strcpy(entry.cli,cli);
276 data_datum.dptr = (char *) &entry;
277 data_datum.dsize = sizeof(ippool_info);
279 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
281 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
282 data->session_db, gdbm_strerror(gdbm_errno));
284 gdbm_close(data->gdbm);
285 gdbm_close(data->ip);
291 free(key_datum.dptr);
293 /* Add the ip pool name */
295 pool_name = cf_section_name2(conf);
296 if (pool_name != NULL)
297 data->name = strdup(pool_name);
299 pthread_mutex_init(&data->op_mutex, NULL);
307 * Check for an Accounting-Stop
308 * If we find one and we have allocated an IP to this nas/port combination, deallocate it.
310 static int ippool_accounting(void *instance, REQUEST *request)
312 rlm_ippool_t *data = (rlm_ippool_t *)instance;
316 int acctstatustype = 0;
325 char xlat_str[MAX_STRING_LEN];
329 if ((vp = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE)) != NULL)
330 acctstatustype = vp->vp_integer;
332 DEBUG("rlm_ippool: Could not find account status type in packet. Return NOOP.");
333 return RLM_MODULE_NOOP;
335 switch(acctstatustype){
337 if (!radius_xlat(xlat_str,MAX_STRING_LEN,data->key, request, NULL)){
338 DEBUG("rlm_ippool: xlat on the 'key' directive failed");
339 return RLM_MODULE_NOOP;
341 MD5Init(&md5_context);
342 MD5Update(&md5_context, xlat_str, strlen(xlat_str));
343 MD5Final(key_str, &md5_context);
345 lrad_bin2hex(key_str,hex_str,16);
347 DEBUG("rlm_ippool: MD5 on 'key' directive maps to: %s",hex_str);
348 memcpy(key.key,key_str,16);
351 /* We don't care about any other accounting packet */
352 DEBUG("rlm_ippool: This is not an Accounting-Stop. Return NOOP.");
354 return RLM_MODULE_NOOP;
357 DEBUG("rlm_ippool: Searching for an entry for key: '%s'",xlat_str);
358 key_datum.dptr = (char *) &key;
359 key_datum.dsize = sizeof(ippool_key);
361 pthread_mutex_lock(&data->op_mutex);
362 data_datum = gdbm_fetch(data->gdbm, key_datum);
363 if (data_datum.dptr != NULL){
366 * If the entry was found set active to zero
368 memcpy(&entry, data_datum.dptr, sizeof(ippool_info));
369 free(data_datum.dptr);
370 DEBUG("rlm_ippool: Deallocated entry for ip: %s",ip_ntoa(str,entry.ipaddr));
376 * Save the reference to the entry
378 save_datum.dptr = key_datum.dptr;
379 save_datum.dsize = key_datum.dsize;
381 data_datum.dptr = (char *) &entry;
382 data_datum.dsize = sizeof(ippool_info);
384 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
386 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
387 data->session_db, gdbm_strerror(gdbm_errno));
388 pthread_mutex_unlock(&data->op_mutex);
389 return RLM_MODULE_FAIL;
393 * Decrease allocated count from the ip index
395 key_datum.dptr = (char *) &entry.ipaddr;
396 key_datum.dsize = sizeof(uint32_t);
397 data_datum = gdbm_fetch(data->ip, key_datum);
398 if (data_datum.dptr != NULL){
399 memcpy(&num, data_datum.dptr, sizeof(int));
400 free(data_datum.dptr);
403 DEBUG("rlm_ippool: num: %d",num);
404 data_datum.dptr = (char *) #
405 data_datum.dsize = sizeof(int);
406 rcode = gdbm_store(data->ip, key_datum, data_datum, GDBM_REPLACE);
408 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
409 data->ip_index, gdbm_strerror(gdbm_errno));
410 pthread_mutex_unlock(&data->op_mutex);
411 return RLM_MODULE_FAIL;
413 if (num >0 && entry.extra == 1){
415 * We are doing MPPP and we still have nas/port entries referencing
416 * this ip. Delete this entry so that eventually we only keep one
417 * reference to this ip.
419 gdbm_delete(data->gdbm,save_datum);
423 pthread_mutex_unlock(&data->op_mutex);
426 pthread_mutex_unlock(&data->op_mutex);
427 DEBUG("rlm_ippool: Entry not found");
430 return RLM_MODULE_OK;
433 static int ippool_postauth(void *instance, REQUEST *request)
435 rlm_ippool_t *data = (rlm_ippool_t *) instance;
453 char xlat_str[MAX_STRING_LEN];
457 /* quiet the compiler */
461 /* Check if Pool-Name attribute exists. If it exists check our name and
462 * run only if they match
464 if ((vp = pairfind(request->config_items, PW_POOL_NAME)) != NULL){
465 if (data->name == NULL || (strcmp(data->name,vp->vp_strvalue) && strcmp(vp->vp_strvalue,"DEFAULT")))
466 return RLM_MODULE_NOOP;
468 DEBUG("rlm_ippool: Could not find Pool-Name attribute.");
469 return RLM_MODULE_NOOP;
476 if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID)) != NULL)
477 cli = vp->vp_strvalue;
480 if (!radius_xlat(xlat_str,MAX_STRING_LEN,data->key, request, NULL)){
481 DEBUG("rlm_ippool: xlat on the 'key' directive failed");
482 return RLM_MODULE_NOOP;
484 MD5Init(&md5_context);
485 MD5Update(&md5_context, xlat_str, strlen(xlat_str));
486 MD5Final(key_str, &md5_context);
488 lrad_bin2hex(key_str,hex_str,16);
490 DEBUG("rlm_ippool: MD5 on 'key' directive maps to: %s",hex_str);
491 memcpy(key.key,key_str,16);
493 DEBUG("rlm_ippool: Searching for an entry for key: '%s'",hex_str);
494 key_datum.dptr = (char *) &key;
495 key_datum.dsize = sizeof(ippool_key);
497 pthread_mutex_lock(&data->op_mutex);
498 data_datum = gdbm_fetch(data->gdbm, key_datum);
499 if (data_datum.dptr != NULL){
501 * If there is a corresponding entry in the database with active=1 it is stale.
505 memcpy(&entry, data_datum.dptr, sizeof(ippool_info));
506 free(data_datum.dptr);
508 DEBUG("rlm_ippool: Found a stale entry for ip: %s",ip_ntoa(str,entry.ipaddr));
514 * Save the reference to the entry
516 save_datum.dptr = key_datum.dptr;
517 save_datum.dsize = key_datum.dsize;
519 data_datum.dptr = (char *) &entry;
520 data_datum.dsize = sizeof(ippool_info);
522 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
524 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
525 data->session_db, gdbm_strerror(gdbm_errno));
526 pthread_mutex_unlock(&data->op_mutex);
527 return RLM_MODULE_FAIL;
529 /* Decrease allocated count from the ip index */
531 key_datum.dptr = (char *) &entry.ipaddr;
532 key_datum.dsize = sizeof(uint32_t);
533 data_datum = gdbm_fetch(data->ip, key_datum);
534 if (data_datum.dptr != NULL){
535 memcpy(&num, data_datum.dptr, sizeof(int));
536 free(data_datum.dptr);
539 DEBUG("rlm_ippool: num: %d",num);
540 data_datum.dptr = (char *) #
541 data_datum.dsize = sizeof(int);
542 rcode = gdbm_store(data->ip, key_datum, data_datum, GDBM_REPLACE);
544 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
545 data->ip_index, gdbm_strerror(gdbm_errno));
546 pthread_mutex_unlock(&data->op_mutex);
547 return RLM_MODULE_FAIL;
549 if (num >0 && entry.extra == 1){
551 * We are doing MPPP and we still have nas/port entries referencing
552 * this ip. Delete this entry so that eventually we only keep one
553 * reference to this ip.
555 gdbm_delete(data->gdbm,save_datum);
562 pthread_mutex_unlock(&data->op_mutex);
565 * If there is a Framed-IP-Address attribute in the reply, check for override
567 if (pairfind(request->reply->vps, PW_FRAMED_IP_ADDRESS) != NULL) {
568 DEBUG("rlm_ippool: Found Framed-IP-Address attribute in reply attribute list.");
571 /* Override supplied Framed-IP-Address */
572 DEBUG("rlm_ippool: override is set to yes. Override the existing Framed-IP-Address attribute.");
573 pairdelete(&request->reply->vps, PW_FRAMED_IP_ADDRESS);
576 DEBUG("rlm_ippool: override is set to no. Return NOOP.");
577 return RLM_MODULE_NOOP;
582 * Walk through the database searching for an active=0 entry.
583 * We search twice. Once to see if we have an active entry with the same callerid
584 * so that MPPP can work ok and then once again to find a free entry.
587 pthread_mutex_lock(&data->op_mutex);
589 key_datum.dptr = NULL;
591 key_datum = gdbm_firstkey(data->gdbm);
592 while(key_datum.dptr){
593 data_datum = gdbm_fetch(data->gdbm, key_datum);
594 if (data_datum.dptr){
595 memcpy(&entry,data_datum.dptr, sizeof(ippool_info));
596 free(data_datum.dptr);
598 * If we find an entry for the same caller-id with active=1
599 * then we use that for multilink (MPPP) to work properly.
601 if (strcmp(entry.cli,cli) == 0 && entry.active){
606 nextkey = gdbm_nextkey(data->gdbm, key_datum);
607 free(key_datum.dptr);
612 if (key_datum.dptr == NULL){
613 key_datum = gdbm_firstkey(data->gdbm);
614 while(key_datum.dptr){
615 data_datum = gdbm_fetch(data->gdbm, key_datum);
616 if (data_datum.dptr){
617 memcpy(&entry,data_datum.dptr, sizeof(ippool_info));
618 free(data_datum.dptr);
621 * Find an entry with active == 0
622 * or an entry that has expired
624 if (entry.active == 0 || (entry.timestamp && ((entry.timeout &&
625 request->timestamp >= (entry.timestamp + entry.timeout)) ||
626 (data->max_timeout && request->timestamp >= (entry.timestamp + data->max_timeout))))){
629 tmp.dptr = (char *) &entry.ipaddr;
630 tmp.dsize = sizeof(uint32_t);
631 data_datum = gdbm_fetch(data->ip, tmp);
634 * If we find an entry in the ip index and the number is zero (meaning
635 * that we haven't allocated the same ip address to another nas/port pair)
636 * or if we don't find an entry then delete the session entry so
637 * that we can change the key
638 * Else we don't delete the session entry since we haven't yet deallocated the
639 * corresponding ip address and we continue our search.
642 if (data_datum.dptr){
643 memcpy(&num,data_datum.dptr, sizeof(int));
644 free(data_datum.dptr);
656 nextkey = gdbm_nextkey(data->gdbm, key_datum);
657 free(key_datum.dptr);
662 * If we have found a free entry set active to 1 then add a Framed-IP-Address attribute to
664 * We keep the operation mutex locked until after we have set the corresponding entry active
669 * Found == 1 means we have the nas/port combination entry in our database
670 * We exchange the ip address between the nas/port entry and the free entry
671 * Afterwards we will save the free ip address to the nas/port entry.
673 * ---------------------------------------------
674 * - NAS/PORT Entry |||| Free Entry ||| Time
675 * - IP1 IP2(Free) BEFORE
676 * - IP2(Free) IP1 AFTER
677 * ---------------------------------------------
679 * We only do this if we are NOT doing MPPP
683 datum data_datum_tmp;
686 memcpy(key_tmp.key,key_str,16);
687 key_datum_tmp.dptr = (char *) &key_tmp;
688 key_datum_tmp.dsize = sizeof(ippool_key);
690 data_datum_tmp = gdbm_fetch(data->gdbm, key_datum_tmp);
691 if (data_datum_tmp.dptr != NULL){
693 rcode = gdbm_store(data->gdbm, key_datum, data_datum_tmp, GDBM_REPLACE);
694 free(data_datum_tmp.dptr);
696 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
697 data->session_db, gdbm_strerror(gdbm_errno));
698 pthread_mutex_unlock(&data->op_mutex);
699 return RLM_MODULE_FAIL;
705 * We have not found the nas/port combination
709 * Delete the entry so that we can change the key
710 * All is well. We delete one entry and we add one entry
712 gdbm_delete(data->gdbm, key_datum);
716 * We are doing MPPP. (mppp should be 1)
717 * We don't do anything.
718 * We will create an extra not needed entry in the database in this case
719 * but we don't really care since we always also use the ip_index database
720 * when we search for a free entry.
721 * We will also delete that entry on the accounting section so that we only
722 * have one nas/port entry referencing each ip
727 radlog(L_ERR, "rlm_ippool: mppp is not one. Please report this behaviour.");
730 free(key_datum.dptr);
732 entry.timestamp = request->timestamp;
733 if ((vp = pairfind(request->reply->vps, PW_SESSION_TIMEOUT)) != NULL)
734 entry.timeout = (time_t) vp->vp_integer;
739 data_datum.dptr = (char *) &entry;
740 data_datum.dsize = sizeof(ippool_info);
741 memcpy(key.key, key_str, 16);
742 key_datum.dptr = (char *) &key;
743 key_datum.dsize = sizeof(ippool_key);
745 DEBUG2("rlm_ippool: Allocating ip to key: '%s'",hex_str);
746 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
748 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
749 data->session_db, gdbm_strerror(gdbm_errno));
750 pthread_mutex_unlock(&data->op_mutex);
751 return RLM_MODULE_FAIL;
754 /* Increase the ip index count */
755 key_datum.dptr = (char *) &entry.ipaddr;
756 key_datum.dsize = sizeof(uint32_t);
757 data_datum = gdbm_fetch(data->ip, key_datum);
758 if (data_datum.dptr){
759 memcpy(&num,data_datum.dptr,sizeof(int));
760 free(data_datum.dptr);
764 DEBUG("rlm_ippool: num: %d",num);
765 data_datum.dptr = (char *) #
766 data_datum.dsize = sizeof(int);
767 rcode = gdbm_store(data->ip, key_datum, data_datum, GDBM_REPLACE);
769 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
770 data->ip_index, gdbm_strerror(gdbm_errno));
771 pthread_mutex_unlock(&data->op_mutex);
772 return RLM_MODULE_FAIL;
774 pthread_mutex_unlock(&data->op_mutex);
777 DEBUG("rlm_ippool: Allocated ip %s to client key: %s",ip_ntoa(str,entry.ipaddr),hex_str);
778 vp = radius_paircreate(request, &request->reply->vps,
779 PW_FRAMED_IP_ADDRESS, PW_TYPE_IPADDR);
780 vp->vp_ipaddr = entry.ipaddr;
783 * If there is no Framed-Netmask attribute in the
786 if (pairfind(request->reply->vps, PW_FRAMED_IP_NETMASK) == NULL) {
787 vp = radius_paircreate(request, &request->reply->vps,
788 PW_FRAMED_IP_NETMASK,
790 vp->vp_ipaddr = ntohl(data->netmask);
795 pthread_mutex_unlock(&data->op_mutex);
796 DEBUG("rlm_ippool: No available ip addresses in pool.");
797 return RLM_MODULE_NOTFOUND;
800 return RLM_MODULE_OK;
803 static int ippool_detach(void *instance)
805 rlm_ippool_t *data = (rlm_ippool_t *) instance;
807 gdbm_close(data->gdbm);
808 gdbm_close(data->ip);
809 pthread_mutex_destroy(&data->op_mutex);
816 * The module name should be the only globally exported symbol.
817 * That is, everything else should be 'static'.
819 * If the module needs to temporarily modify it's instantiation
820 * data, the type should be changed to RLM_TYPE_THREAD_UNSAFE.
821 * The server will then take care of ensuring that the module
822 * is single-threaded.
824 module_t rlm_ippool = {
827 RLM_TYPE_THREAD_SAFE, /* type */
828 ippool_instantiate, /* instantiation */
829 ippool_detach, /* detach */
831 NULL, /* authentication */
832 NULL, /* authorization */
833 NULL, /* preaccounting */
834 ippool_accounting, /* accounting */
835 NULL, /* checksimul */
836 NULL, /* pre-proxy */
837 NULL, /* post-proxy */
838 ippool_postauth /* post-auth */