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)
173 const char *cli = "0";
174 const char *pool_name = NULL;
177 * Set up a storage area for instance data
179 data = rad_malloc(sizeof(*data));
183 memset(data, 0, sizeof(*data));
186 * If the configuration parameters can't be parsed, then
189 if (cf_section_parse(conf, data, module_config) < 0) {
193 cache_size = data->cache_size;
195 if (data->session_db == NULL) {
196 radlog(L_ERR, "rlm_ippool: 'session-db' must be set.");
200 if (data->ip_index == NULL) {
201 radlog(L_ERR, "rlm_ippool: 'ip-index' must be set.");
205 data->range_start = htonl(data->range_start);
206 data->range_stop = htonl(data->range_stop);
207 data->netmask = htonl(data->netmask);
208 if (data->range_start == 0 || data->range_stop == 0 || \
209 data->range_start >= data->range_stop ) {
210 radlog(L_ERR, "rlm_ippool: Invalid configuration data given.");
215 data->gdbm = gdbm_open(data->session_db, sizeof(int),
216 GDBM_WRCREAT | GDBM_IPPOOL_OPTS, 0600, NULL);
217 if (data->gdbm == NULL) {
218 radlog(L_ERR, "rlm_ippool: Failed to open file %s: %s",
219 data->session_db, strerror(errno));
222 data->ip = gdbm_open(data->ip_index, sizeof(int),
223 GDBM_WRCREAT | GDBM_IPPOOL_OPTS, 0600, NULL);
224 if (data->ip == NULL) {
225 radlog(L_ERR, "rlm_ippool: Failed to open file %s: %s",
226 data->ip_index, strerror(errno));
229 if (gdbm_setopt(data->gdbm, GDBM_CACHESIZE, &cache_size, sizeof(int)) == -1)
230 radlog(L_ERR, "rlm_ippool: Failed to set cache size");
231 if (gdbm_setopt(data->ip, GDBM_CACHESIZE, &cache_size, sizeof(int)) == -1)
232 radlog(L_ERR, "rlm_ippool: Failed to set cache size");
234 key_datum = gdbm_firstkey(data->gdbm);
235 if (key_datum.dptr == NULL){
237 * If the database does not exist initialize it.
238 * We set the nas/port pairs to not existent values and
247 DEBUG("rlm_ippool: Initializing database");
248 for(i=data->range_start,j=~0;i<=data->range_stop;i++,j--){
251 * Net and Broadcast addresses are excluded
253 or_result = i | data->netmask;
254 if (~data->netmask != 0 &&
255 (or_result == data->netmask ||
256 (~or_result == 0))) {
257 DEBUG("rlm_ippool: IP %s excluded",
258 ip_ntoa(str, ntohl(i)));
262 sprintf(init_str,"%016d",j);
263 DEBUG("rlm_ippool: Initialized bucket: %s",init_str);
264 memcpy(key.key, init_str,16);
265 key_datum.dptr = (char *) &key;
266 key_datum.dsize = sizeof(ippool_key);
268 entry.ipaddr = ntohl(i);
273 strcpy(entry.cli,cli);
275 data_datum.dptr = (char *) &entry;
276 data_datum.dsize = sizeof(ippool_info);
278 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
280 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
281 data->session_db, gdbm_strerror(gdbm_errno));
282 gdbm_close(data->gdbm);
283 gdbm_close(data->ip);
290 free(key_datum.dptr);
292 /* Add the ip pool name */
294 pool_name = cf_section_name2(conf);
295 if (pool_name != NULL)
296 data->name = strdup(pool_name);
298 pthread_mutex_init(&data->op_mutex, NULL);
306 * Check for an Accounting-Stop
307 * If we find one and we have allocated an IP to this nas/port combination, deallocate it.
309 static int ippool_accounting(void *instance, REQUEST *request)
311 rlm_ippool_t *data = (rlm_ippool_t *)instance;
315 int acctstatustype = 0;
324 char xlat_str[MAX_STRING_LEN];
325 FR_MD5_CTX md5_context;
328 if ((vp = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE, 0)) != NULL)
329 acctstatustype = vp->vp_integer;
331 RDEBUG("Could not find account status type in packet. Return NOOP.");
332 return RLM_MODULE_NOOP;
334 switch(acctstatustype){
336 if (!radius_xlat(xlat_str,MAX_STRING_LEN,data->key, request, NULL)){
337 RDEBUG("xlat on the 'key' directive failed");
338 return RLM_MODULE_NOOP;
340 fr_MD5Init(&md5_context);
341 fr_MD5Update(&md5_context, xlat_str, strlen(xlat_str));
342 fr_MD5Final(key_str, &md5_context);
344 fr_bin2hex(key_str,hex_str,16);
346 RDEBUG("MD5 on 'key' directive maps to: %s",hex_str);
347 memcpy(key.key,key_str,16);
350 /* We don't care about any other accounting packet */
351 RDEBUG("This is not an Accounting-Stop. Return NOOP.");
353 return RLM_MODULE_NOOP;
356 RDEBUG("Searching for an entry for key: '%s'",xlat_str);
357 key_datum.dptr = (char *) &key;
358 key_datum.dsize = sizeof(ippool_key);
360 pthread_mutex_lock(&data->op_mutex);
361 data_datum = gdbm_fetch(data->gdbm, key_datum);
362 if (data_datum.dptr != NULL){
365 * If the entry was found set active to zero
367 memcpy(&entry, data_datum.dptr, sizeof(ippool_info));
368 free(data_datum.dptr);
369 RDEBUG("Deallocated entry for ip: %s",ip_ntoa(str,entry.ipaddr));
375 * Save the reference to the entry
377 save_datum.dptr = key_datum.dptr;
378 save_datum.dsize = key_datum.dsize;
380 data_datum.dptr = (char *) &entry;
381 data_datum.dsize = sizeof(ippool_info);
383 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
385 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
386 data->session_db, gdbm_strerror(gdbm_errno));
387 pthread_mutex_unlock(&data->op_mutex);
388 return RLM_MODULE_FAIL;
392 * Decrease allocated count from the ip index
394 key_datum.dptr = (char *) &entry.ipaddr;
395 key_datum.dsize = sizeof(uint32_t);
396 data_datum = gdbm_fetch(data->ip, key_datum);
397 if (data_datum.dptr != NULL){
398 memcpy(&num, data_datum.dptr, sizeof(int));
399 free(data_datum.dptr);
402 RDEBUG("num: %d",num);
403 data_datum.dptr = (char *) #
404 data_datum.dsize = sizeof(int);
405 rcode = gdbm_store(data->ip, key_datum, data_datum, GDBM_REPLACE);
407 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
408 data->ip_index, gdbm_strerror(gdbm_errno));
409 pthread_mutex_unlock(&data->op_mutex);
410 return RLM_MODULE_FAIL;
412 if (num >0 && entry.extra == 1){
414 * We are doing MPPP and we still have nas/port entries referencing
415 * this ip. Delete this entry so that eventually we only keep one
416 * reference to this ip.
418 gdbm_delete(data->gdbm,save_datum);
422 pthread_mutex_unlock(&data->op_mutex);
425 pthread_mutex_unlock(&data->op_mutex);
426 RDEBUG("Entry not found");
429 return RLM_MODULE_OK;
432 static int ippool_postauth(void *instance, REQUEST *request)
434 rlm_ippool_t *data = (rlm_ippool_t *) instance;
452 char xlat_str[MAX_STRING_LEN];
453 FR_MD5_CTX md5_context;
456 /* quiet the compiler */
460 /* Check if Pool-Name attribute exists. If it exists check our name and
461 * run only if they match
463 if ((vp = pairfind(request->config_items, PW_POOL_NAME, 0)) != NULL){
464 if (data->name == NULL || (strcmp(data->name,vp->vp_strvalue) && strcmp(vp->vp_strvalue,"DEFAULT")))
465 return RLM_MODULE_NOOP;
467 RDEBUG("Could not find Pool-Name attribute.");
468 return RLM_MODULE_NOOP;
475 if ((vp = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0)) != NULL)
476 cli = vp->vp_strvalue;
479 if (!radius_xlat(xlat_str,MAX_STRING_LEN,data->key, request, NULL)){
480 RDEBUG("xlat on the 'key' directive failed");
481 return RLM_MODULE_NOOP;
483 fr_MD5Init(&md5_context);
484 fr_MD5Update(&md5_context, xlat_str, strlen(xlat_str));
485 fr_MD5Final(key_str, &md5_context);
487 fr_bin2hex(key_str,hex_str,16);
489 RDEBUG("MD5 on 'key' directive maps to: %s",hex_str);
490 memcpy(key.key,key_str,16);
492 RDEBUG("Searching for an entry for key: '%s'",hex_str);
493 key_datum.dptr = (char *) &key;
494 key_datum.dsize = sizeof(ippool_key);
496 pthread_mutex_lock(&data->op_mutex);
497 data_datum = gdbm_fetch(data->gdbm, key_datum);
498 if (data_datum.dptr != NULL){
500 * If there is a corresponding entry in the database with active=1 it is stale.
504 memcpy(&entry, data_datum.dptr, sizeof(ippool_info));
505 free(data_datum.dptr);
507 RDEBUG("Found a stale entry for ip: %s",ip_ntoa(str,entry.ipaddr));
513 * Save the reference to the entry
515 save_datum.dptr = key_datum.dptr;
516 save_datum.dsize = key_datum.dsize;
518 data_datum.dptr = (char *) &entry;
519 data_datum.dsize = sizeof(ippool_info);
521 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
523 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
524 data->session_db, gdbm_strerror(gdbm_errno));
525 pthread_mutex_unlock(&data->op_mutex);
526 return RLM_MODULE_FAIL;
528 /* Decrease allocated count from the ip index */
530 key_datum.dptr = (char *) &entry.ipaddr;
531 key_datum.dsize = sizeof(uint32_t);
532 data_datum = gdbm_fetch(data->ip, key_datum);
533 if (data_datum.dptr != NULL){
534 memcpy(&num, data_datum.dptr, sizeof(int));
535 free(data_datum.dptr);
538 RDEBUG("num: %d",num);
539 data_datum.dptr = (char *) #
540 data_datum.dsize = sizeof(int);
541 rcode = gdbm_store(data->ip, key_datum, data_datum, GDBM_REPLACE);
543 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
544 data->ip_index, gdbm_strerror(gdbm_errno));
545 pthread_mutex_unlock(&data->op_mutex);
546 return RLM_MODULE_FAIL;
548 if (num >0 && entry.extra == 1){
550 * We are doing MPPP and we still have nas/port entries referencing
551 * this ip. Delete this entry so that eventually we only keep one
552 * reference to this ip.
554 gdbm_delete(data->gdbm,save_datum);
561 pthread_mutex_unlock(&data->op_mutex);
564 * If there is a Framed-IP-Address attribute in the reply, check for override
566 if (pairfind(request->reply->vps, PW_FRAMED_IP_ADDRESS, 0) != NULL) {
567 RDEBUG("Found Framed-IP-Address attribute in reply attribute list.");
570 /* Override supplied Framed-IP-Address */
571 RDEBUG("override is set to yes. Override the existing Framed-IP-Address attribute.");
572 pairdelete(&request->reply->vps, PW_FRAMED_IP_ADDRESS);
575 RDEBUG("override is set to no. Return NOOP.");
576 return RLM_MODULE_NOOP;
581 * Walk through the database searching for an active=0 entry.
582 * We search twice. Once to see if we have an active entry with the same callerid
583 * so that MPPP can work ok and then once again to find a free entry.
586 pthread_mutex_lock(&data->op_mutex);
588 key_datum.dptr = NULL;
590 key_datum = gdbm_firstkey(data->gdbm);
591 while(key_datum.dptr){
592 data_datum = gdbm_fetch(data->gdbm, key_datum);
593 if (data_datum.dptr){
594 memcpy(&entry,data_datum.dptr, sizeof(ippool_info));
595 free(data_datum.dptr);
597 * If we find an entry for the same caller-id with active=1
598 * then we use that for multilink (MPPP) to work properly.
600 if (strcmp(entry.cli,cli) == 0 && entry.active){
605 nextkey = gdbm_nextkey(data->gdbm, key_datum);
606 free(key_datum.dptr);
611 if (key_datum.dptr == NULL){
612 key_datum = gdbm_firstkey(data->gdbm);
613 while(key_datum.dptr){
614 data_datum = gdbm_fetch(data->gdbm, key_datum);
615 if (data_datum.dptr){
616 memcpy(&entry,data_datum.dptr, sizeof(ippool_info));
617 free(data_datum.dptr);
620 * Find an entry with active == 0
621 * or an entry that has expired
623 if (entry.active == 0 || (entry.timestamp && ((entry.timeout &&
624 request->timestamp >= (entry.timestamp + entry.timeout)) ||
625 (data->max_timeout && request->timestamp >= (entry.timestamp + data->max_timeout))))){
628 tmp.dptr = (char *) &entry.ipaddr;
629 tmp.dsize = sizeof(uint32_t);
630 data_datum = gdbm_fetch(data->ip, tmp);
633 * If we find an entry in the ip index and the number is zero (meaning
634 * that we haven't allocated the same ip address to another nas/port pair)
635 * or if we don't find an entry then delete the session entry so
636 * that we can change the key
637 * Else we don't delete the session entry since we haven't yet deallocated the
638 * corresponding ip address and we continue our search.
641 if (data_datum.dptr){
642 memcpy(&num,data_datum.dptr, sizeof(int));
643 free(data_datum.dptr);
655 nextkey = gdbm_nextkey(data->gdbm, key_datum);
656 free(key_datum.dptr);
661 * If we have found a free entry set active to 1 then add a Framed-IP-Address attribute to
663 * We keep the operation mutex locked until after we have set the corresponding entry active
668 * Found == 1 means we have the nas/port combination entry in our database
669 * We exchange the ip address between the nas/port entry and the free entry
670 * Afterwards we will save the free ip address to the nas/port entry.
672 * ---------------------------------------------
673 * - NAS/PORT Entry |||| Free Entry ||| Time
674 * - IP1 IP2(Free) BEFORE
675 * - IP2(Free) IP1 AFTER
676 * ---------------------------------------------
678 * We only do this if we are NOT doing MPPP
682 datum data_datum_tmp;
685 memcpy(key_tmp.key,key_str,16);
686 key_datum_tmp.dptr = (char *) &key_tmp;
687 key_datum_tmp.dsize = sizeof(ippool_key);
689 data_datum_tmp = gdbm_fetch(data->gdbm, key_datum_tmp);
690 if (data_datum_tmp.dptr != NULL){
692 rcode = gdbm_store(data->gdbm, key_datum, data_datum_tmp, GDBM_REPLACE);
693 free(data_datum_tmp.dptr);
695 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
696 data->session_db, gdbm_strerror(gdbm_errno));
697 pthread_mutex_unlock(&data->op_mutex);
698 return RLM_MODULE_FAIL;
704 * We have not found the nas/port combination
708 * Delete the entry so that we can change the key
709 * All is well. We delete one entry and we add one entry
711 gdbm_delete(data->gdbm, key_datum);
715 * We are doing MPPP. (mppp should be 1)
716 * We don't do anything.
717 * We will create an extra not needed entry in the database in this case
718 * but we don't really care since we always also use the ip_index database
719 * when we search for a free entry.
720 * We will also delete that entry on the accounting section so that we only
721 * have one nas/port entry referencing each ip
726 radlog(L_ERR, "rlm_ippool: mppp is not one. Please report this behaviour.");
729 free(key_datum.dptr);
731 entry.timestamp = request->timestamp;
732 if ((vp = pairfind(request->reply->vps, PW_SESSION_TIMEOUT, 0)) != NULL)
733 entry.timeout = (time_t) vp->vp_integer;
738 data_datum.dptr = (char *) &entry;
739 data_datum.dsize = sizeof(ippool_info);
740 memcpy(key.key, key_str, 16);
741 key_datum.dptr = (char *) &key;
742 key_datum.dsize = sizeof(ippool_key);
744 DEBUG2("rlm_ippool: Allocating ip to key: '%s'",hex_str);
745 rcode = gdbm_store(data->gdbm, key_datum, data_datum, GDBM_REPLACE);
747 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
748 data->session_db, gdbm_strerror(gdbm_errno));
749 pthread_mutex_unlock(&data->op_mutex);
750 return RLM_MODULE_FAIL;
753 /* Increase the ip index count */
754 key_datum.dptr = (char *) &entry.ipaddr;
755 key_datum.dsize = sizeof(uint32_t);
756 data_datum = gdbm_fetch(data->ip, key_datum);
757 if (data_datum.dptr){
758 memcpy(&num,data_datum.dptr,sizeof(int));
759 free(data_datum.dptr);
763 RDEBUG("num: %d",num);
764 data_datum.dptr = (char *) #
765 data_datum.dsize = sizeof(int);
766 rcode = gdbm_store(data->ip, key_datum, data_datum, GDBM_REPLACE);
768 radlog(L_ERR, "rlm_ippool: Failed storing data to %s: %s",
769 data->ip_index, gdbm_strerror(gdbm_errno));
770 pthread_mutex_unlock(&data->op_mutex);
771 return RLM_MODULE_FAIL;
773 pthread_mutex_unlock(&data->op_mutex);
776 RDEBUG("Allocated ip %s to client key: %s",ip_ntoa(str,entry.ipaddr),hex_str);
777 vp = radius_paircreate(request, &request->reply->vps,
778 PW_FRAMED_IP_ADDRESS, PW_TYPE_IPADDR);
779 vp->vp_ipaddr = entry.ipaddr;
782 * If there is no Framed-Netmask attribute in the
785 if (pairfind(request->reply->vps, PW_FRAMED_IP_NETMASK, 0) == NULL) {
786 vp = radius_paircreate(request, &request->reply->vps,
787 PW_FRAMED_IP_NETMASK,
789 vp->vp_ipaddr = ntohl(data->netmask);
794 pthread_mutex_unlock(&data->op_mutex);
795 RDEBUG("No available ip addresses in pool.");
796 return RLM_MODULE_NOTFOUND;
799 return RLM_MODULE_OK;
802 static int ippool_detach(void *instance)
804 rlm_ippool_t *data = (rlm_ippool_t *) instance;
806 gdbm_close(data->gdbm);
807 gdbm_close(data->ip);
808 pthread_mutex_destroy(&data->op_mutex);
815 * The module name should be the only globally exported symbol.
816 * That is, everything else should be 'static'.
818 * If the module needs to temporarily modify it's instantiation
819 * data, the type should be changed to RLM_TYPE_THREAD_UNSAFE.
820 * The server will then take care of ensuring that the module
821 * is single-threaded.
823 module_t rlm_ippool = {
826 RLM_TYPE_THREAD_SAFE, /* type */
827 ippool_instantiate, /* instantiation */
828 ippool_detach, /* detach */
830 NULL, /* authentication */
831 NULL, /* authorization */
832 NULL, /* preaccounting */
833 ippool_accounting, /* accounting */
834 NULL, /* checksimul */
835 NULL, /* pre-proxy */
836 NULL, /* post-proxy */
837 ippool_postauth /* post-auth */