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 2001 The FreeRADIUS server project
21 * Copyright 2001 Alan DeKok <aland@ox.org>
22 * Copyright 2001,2002 Kostas Kalevras <kkalev@noc.ntua.gr>
27 #include "libradius.h"
41 #ifdef NEEDS_GDBM_SYNC
42 # define GDBM_SYNCOPT GDBM_SYNC
44 # define GDBM_SYNCOPT 0
48 #define GDBM_COUNTER_OPTS (GDBM_SYNCOPT | GDBM_NOLOCK)
50 #define GDBM_COUNTER_OPTS (GDBM_SYNCOPT)
53 #ifndef HAVE_GDBM_FDESC
54 #define gdbm_fdesc(foo) (-1)
57 #define UNIQUEID_MAX_LEN 32
59 static const char rcsid[] = "$Id$";
62 * Define a structure for our module configuration.
64 * These variables do not need to be in a structure, but it's
65 * a lot cleaner to do so, and a pointer to the structure can
66 * be used as the instance handle.
68 typedef struct rlm_counter_t {
69 char *filename; /* name of the database file */
70 char *reset; /* daily, weekly, monthly, never or user defined */
71 char *key_name; /* User-Name */
72 char *count_attribute; /* Acct-Session-Time */
73 char *counter_name; /* Daily-Session-Time */
74 char *check_name; /* Daily-Max-Session */
75 char *service_type; /* Service-Type to search for */
81 time_t reset_time; /* The time of the next reset. */
82 time_t last_reset; /* The time of the last reset. */
83 int dict_attr; /* attribute number for the counter. */
84 GDBM_FILE gdbm; /* The gdbm file handle */
86 pthread_mutex_t mutex; /* A mutex to lock the gdbm file for only one reader/writer */
90 #ifndef HAVE_PTHREAD_H
92 * This is a lot simpler than putting ifdef's around
93 * every use of the pthread functions.
95 #define pthread_mutex_lock(a)
96 #define pthread_mutex_unlock(a)
97 #define pthread_mutex_init(a,b)
98 #define pthread_mutex_destroy(a)
101 typedef struct rad_counter {
102 unsigned int user_counter;
103 char uniqueid[UNIQUEID_MAX_LEN];
107 * A mapping of configuration file names to internal variables.
109 * Note that the string is dynamically allocated, so it MUST
110 * be freed. When the configuration file parse re-reads the string,
111 * it free's the old one, and strdup's the new one, placing the pointer
112 * to the strdup'd string into 'config.string'. This gets around
115 static CONF_PARSER module_config[] = {
116 { "filename", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,filename), NULL, NULL },
117 { "key", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,key_name), NULL, NULL },
118 { "reset", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,reset), NULL, NULL },
119 { "count-attribute", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,count_attribute), NULL, NULL },
120 { "counter-name", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,counter_name), NULL, NULL },
121 { "check-name", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,check_name), NULL, NULL },
122 { "allowed-servicetype", PW_TYPE_STRING_PTR, offsetof(rlm_counter_t,service_type),NULL, NULL },
123 { "cache-size", PW_TYPE_INTEGER, offsetof(rlm_counter_t,cache_size), NULL, "1000" },
124 { NULL, -1, 0, NULL, NULL }
129 * See if the counter matches.
131 static int counter_cmp(void *instance, REQUEST *req, VALUE_PAIR *request, VALUE_PAIR *check,
132 VALUE_PAIR *check_pairs, VALUE_PAIR **reply_pairs)
134 rlm_counter_t *data = (rlm_counter_t *) instance;
140 check_pairs = check_pairs; /* shut the compiler up */
141 reply_pairs = reply_pairs;
144 * Find the key attribute.
146 key_vp = pairfind(request, data->key_attr);
147 if (key_vp == NULL) {
148 return RLM_MODULE_NOOP;
151 key_datum.dptr = key_vp->strvalue;
152 key_datum.dsize = key_vp->length;
154 count_datum = gdbm_fetch(data->gdbm, key_datum);
156 if (count_datum.dptr == NULL) {
159 memcpy(&counter, count_datum.dptr, sizeof(rad_counter));
160 free(count_datum.dptr);
162 return counter.user_counter - check->lvalue;
165 static int add_defaults(rlm_counter_t *data)
169 const char *default1 = "DEFAULT1";
170 const char *default2 = "DEFAULT2";
172 DEBUG2("rlm_counter: add_defaults: Start");
174 key_datum.dptr = (const char *) default1;
175 key_datum.dsize = strlen(default1);
176 time_datum.dptr = (char *) &data->reset_time;
177 time_datum.dsize = sizeof(time_t);
179 if (gdbm_store(data->gdbm, key_datum, time_datum, GDBM_REPLACE) < 0){
180 radlog(L_ERR, "rlm_counter: Failed storing data to %s: %s",
181 data->filename, gdbm_strerror(gdbm_errno));
182 return RLM_MODULE_FAIL;
184 DEBUG2("rlm_counter: DEFAULT1 set to %d",(int)data->reset_time);
186 key_datum.dptr = (const char *) default2;
187 key_datum.dsize = strlen(default2);
188 time_datum.dptr = (char *) &data->last_reset;
189 time_datum.dsize = sizeof(time_t);
191 if (gdbm_store(data->gdbm, key_datum, time_datum, GDBM_REPLACE) < 0){
192 radlog(L_ERR, "rlm_counter: Failed storing data to %s: %s",
193 data->filename, gdbm_strerror(gdbm_errno));
194 return RLM_MODULE_FAIL;
196 DEBUG2("rlm_counter: DEFAULT2 set to %d",(int)data->last_reset);
197 DEBUG2("rlm_counter: add_defaults: End");
199 return RLM_MODULE_OK;
202 static int reset_db(rlm_counter_t *data)
204 int cache_size = data->cache_size;
207 DEBUG2("rlm_counter: reset_db: Closing database");
208 gdbm_close(data->gdbm);
211 * Open a completely new database.
213 data->gdbm = gdbm_open(data->filename, sizeof(int),
214 GDBM_NEWDB | GDBM_COUNTER_OPTS, 0600, NULL);
215 if (data->gdbm == NULL) {
216 radlog(L_ERR, "rlm_counter: Failed to open file %s: %s",
217 data->filename, strerror(errno));
218 return RLM_MODULE_FAIL;
220 if (gdbm_setopt(data->gdbm, GDBM_CACHESIZE, &cache_size, sizeof(int)) == -1)
221 radlog(L_ERR, "rlm_counter: Failed to set cache size");
222 DEBUG2("rlm_counter: reset_db: Opened new database");
227 ret = add_defaults(data);
228 if (ret != RLM_MODULE_OK)
231 DEBUG2("rlm_counter: reset_db ended");
233 return RLM_MODULE_OK;
236 static int find_next_reset(rlm_counter_t *data, time_t timeval)
243 tm = localtime_r(&timeval, &s_tm);
244 tm->tm_sec = tm->tm_min = 0;
246 if (data->reset == NULL)
248 if (isdigit((int) data->reset[0])){
251 len = strlen(data->reset);
254 last = data->reset[len - 1];
255 if (!isalpha((int) last))
257 num = atoi(data->reset);
258 DEBUG("rlm_counter: num=%d, last=%c",num,last);
260 if (strcmp(data->reset, "hourly") == 0 || last == 'h') {
262 * Round up to the next nearest hour.
265 data->reset_time = mktime(tm);
266 } else if (strcmp(data->reset, "daily") == 0 || last == 'd') {
268 * Round up to the next nearest day.
272 data->reset_time = mktime(tm);
273 } else if (strcmp(data->reset, "weekly") == 0 || last == 'w') {
275 * Round up to the next nearest week.
278 tm->tm_mday += (7 - tm->tm_wday) +(7*(num-1));
279 data->reset_time = mktime(tm);
280 } else if (strcmp(data->reset, "monthly") == 0 || last == 'm') {
284 data->reset_time = mktime(tm);
285 } else if (strcmp(data->reset, "never") == 0) {
286 data->reset_time = 0;
288 radlog(L_ERR, "rlm_counter: Unknown reset timer \"%s\"",
292 DEBUG2("rlm_counter: Current Time: %d, Next reset %d",
293 (int)timeval,(int)data->reset_time);
300 * Do any per-module initialization that is separate to each
301 * configured instance of the module. e.g. set up connections
302 * to external databases, read configuration files, set up
303 * dictionary entries, etc.
305 * If configuration information is given in the config section
306 * that must be referenced in later calls, store a handle to it
307 * in *instance otherwise put a null pointer there.
309 static int counter_instantiate(CONF_SECTION *conf, void **instance)
320 const char *default1 = "DEFAULT1";
321 const char *default2 = "DEFAULT2";
324 * Set up a storage area for instance data
326 data = rad_malloc(sizeof(*data));
330 memset(data, 0, sizeof(*data));
333 * If the configuration parameters can't be parsed, then
336 if (cf_section_parse(conf, data, module_config) < 0) {
340 cache_size = data->cache_size;
343 * Discover the attribute number of the key.
345 if (data->key_name == NULL) {
346 radlog(L_ERR, "rlm_counter: 'key' must be set.");
349 dattr = dict_attrbyname(data->key_name);
351 radlog(L_ERR, "rlm_counter: No such attribute %s",
355 data->key_attr = dattr->attr;
358 * Discover the attribute number of the counter.
360 if (data->count_attribute == NULL) {
361 radlog(L_ERR, "rlm_counter: 'count-attribute' must be set.");
364 dattr = dict_attrbyname(data->count_attribute);
366 radlog(L_ERR, "rlm_counter: No such attribute %s",
367 data->count_attribute);
370 data->count_attr = dattr->attr;
373 * Create a new attribute for the counter.
375 if (data->counter_name == NULL) {
376 radlog(L_ERR, "rlm_counter: 'counter-name' must be set.");
380 memset(&flags, 0, sizeof(flags));
381 dict_addattr(data->counter_name, 0, PW_TYPE_INTEGER, -1, flags);
382 dattr = dict_attrbyname(data->counter_name);
384 radlog(L_ERR, "rlm_counter: Failed to create counter attribute %s",
388 data->dict_attr = dattr->attr;
389 DEBUG2("rlm_counter: Counter attribute %s is number %d",
390 data->counter_name, data->dict_attr);
393 * Create a new attribute for the check item.
395 if (data->check_name == NULL) {
396 radlog(L_ERR, "rlm_counter: 'check-name' must be set.");
399 dict_addattr(data->check_name, 0, PW_TYPE_INTEGER, -1, flags);
400 dattr = dict_attrbyname(data->check_name);
402 radlog(L_ERR, "rlm_counter: Failed to create check attribute %s",
406 data->check_attr = dattr->attr;
409 * Find the attribute for the allowed protocol
411 if (data->service_type != NULL) {
412 if ((dval = dict_valbyname(PW_SERVICE_TYPE, data->service_type)) == NULL) {
413 radlog(L_ERR, "rlm_counter: Failed to find attribute number for %s",
417 data->service_val = dval->value;
421 * Find when to reset the database.
423 if (data->reset == NULL) {
424 radlog(L_ERR, "rlm_counter: 'reset' must be set.");
428 data->reset_time = 0;
429 data->last_reset = now;
431 if (find_next_reset(data,now) == -1)
434 if (data->filename == NULL) {
435 radlog(L_ERR, "rlm_counter: 'filename' must be set.");
438 data->gdbm = gdbm_open(data->filename, sizeof(int),
439 GDBM_WRCREAT | GDBM_COUNTER_OPTS, 0600, NULL);
440 if (data->gdbm == NULL) {
441 radlog(L_ERR, "rlm_counter: Failed to open file %s: %s",
442 data->filename, strerror(errno));
445 if (gdbm_setopt(data->gdbm, GDBM_CACHESIZE, &cache_size, sizeof(int)) == -1)
446 radlog(L_ERR, "rlm_counter: Failed to set cache size");
449 * Look for the DEFAULT1 entry. This entry if it exists contains the
450 * time of the next database reset. This time is set each time we reset
451 * the database. If next_reset < now then we reset the database.
452 * That way we can overcome the problem where radiusd is down during a database
453 * reset time. If we did not keep state information in the database then the reset
454 * would be extended and that would create problems.
456 * We also store the time of the last reset in the DEFAULT2 entry.
458 * If DEFAULT1 and DEFAULT2 do not exist (new database) we add them to the database
461 key_datum.dptr = (const char *)default1;
462 key_datum.dsize = strlen(default1);
464 time_datum = gdbm_fetch(data->gdbm, key_datum);
465 if (time_datum.dptr != NULL){
466 time_t next_reset = 0;
468 memcpy(&next_reset, time_datum.dptr, sizeof(time_t));
469 free(time_datum.dptr);
470 if (next_reset && next_reset <= now){
472 data->last_reset = now;
473 ret = reset_db(data);
474 if (ret != RLM_MODULE_OK)
478 data->reset_time = next_reset;
479 key_datum.dptr = (const char *)default2;
480 key_datum.dsize = strlen(default2);
482 time_datum = gdbm_fetch(data->gdbm, key_datum);
483 if (time_datum.dptr != NULL){
484 memcpy(&data->last_reset, time_datum.dptr, sizeof(time_t));
485 free(time_datum.dptr);
489 ret = add_defaults(data);
490 if (ret != RLM_MODULE_OK)
496 * Register the counter comparison operation.
498 paircompare_register(data->dict_attr, 0, counter_cmp, data);
503 pthread_mutex_init(&data->mutex, NULL);
511 * Write accounting information to this modules database.
513 static int counter_accounting(void *instance, REQUEST *request)
515 rlm_counter_t *data = (rlm_counter_t *)instance;
518 VALUE_PAIR *key_vp, *count_vp, *proto_vp, *uniqueid_vp;
521 int acctstatustype = 0;
524 if ((key_vp = pairfind(request->packet->vps, PW_ACCT_STATUS_TYPE)) != NULL)
525 acctstatustype = key_vp->lvalue;
527 DEBUG("rlm_counter: Could not find account status type in packet.");
528 return RLM_MODULE_NOOP;
530 if (acctstatustype != PW_STATUS_STOP){
531 DEBUG("rlm_counter: We only run on Accounting-Stop packets.");
532 return RLM_MODULE_NOOP;
534 uniqueid_vp = pairfind(request->packet->vps, PW_ACCT_UNIQUE_SESSION_ID);
535 if (uniqueid_vp != NULL)
536 DEBUG("rlm_counter: Packet Unique ID = '%s'",uniqueid_vp->strvalue);
539 * Before doing anything else, see if we have to reset
542 if (data->reset_time && (data->reset_time <= request->timestamp)) {
545 data->last_reset = data->reset_time;
546 find_next_reset(data,request->timestamp);
547 pthread_mutex_lock(&data->mutex);
548 ret = reset_db(data);
549 pthread_mutex_unlock(&data->mutex);
550 if (ret != RLM_MODULE_OK)
554 * Check if we need to watch out for a specific service-type. If yes then check it
556 if (data->service_type != NULL) {
557 if ((proto_vp = pairfind(request->packet->vps, PW_SERVICE_TYPE)) == NULL){
558 DEBUG("rlm_counter: Could not find Service-Type attribute in the request. Returning NOOP.");
559 return RLM_MODULE_NOOP;
561 if (proto_vp->lvalue != data->service_val){
562 DEBUG("rlm_counter: This Service-Type is not allowed. Returning NOOP.");
563 return RLM_MODULE_NOOP;
569 * Look for the key. User-Name is special. It means
570 * The REAL username, after stripping.
572 key_vp = (data->key_attr == PW_USER_NAME) ? request->username : pairfind(request->packet->vps, data->key_attr);
574 DEBUG("rlm_counter: Could not find the key-attribute in the request. Returning NOOP.");
575 return RLM_MODULE_NOOP;
579 * Look for the attribute to use as a counter.
581 count_vp = pairfind(request->packet->vps, data->count_attr);
582 if (count_vp == NULL){
583 DEBUG("rlm_counter: Could not find the count-attribute in the request.");
584 return RLM_MODULE_NOOP;
587 key_datum.dptr = key_vp->strvalue;
588 key_datum.dsize = key_vp->length;
590 pthread_mutex_lock(&data->mutex);
591 count_datum = gdbm_fetch(data->gdbm, key_datum);
592 pthread_mutex_unlock(&data->mutex);
593 if (count_datum.dptr == NULL){
594 counter.user_counter = 0;
595 if (uniqueid_vp != NULL)
596 strncpy(uniqueid_vp->strvalue,counter.uniqueid,UNIQUEID_MAX_LEN - 1);
598 memset((char *)counter.uniqueid,0,UNIQUEID_MAX_LEN);
601 memcpy(&counter, count_datum.dptr, sizeof(rad_counter));
602 free(count_datum.dptr);
603 if (counter.uniqueid)
604 DEBUG("rlm_counter: Counter Unique ID = '%s'",counter.uniqueid);
605 if (uniqueid_vp != NULL){
606 if (counter.uniqueid != NULL &&
607 strncmp(uniqueid_vp->strvalue,counter.uniqueid, UNIQUEID_MAX_LEN - 1) == 0){
608 DEBUG("rlm_counter: Unique IDs for user match. Droping the request.");
609 return RLM_MODULE_NOOP;
611 strncpy(counter.uniqueid,uniqueid_vp->strvalue,UNIQUEID_MAX_LEN - 1);
613 DEBUG("rlm_counter: User=%s, Counter=%d.",request->username->strvalue,counter.user_counter);
616 if (data->count_attr == PW_ACCT_SESSION_TIME) {
618 * If session time < diff then the user got in after the
619 * last reset. So add his session time, otherwise add the
622 * That way if he logged in at 23:00 and we reset the
623 * daily counter at 24:00 and he logged out at 01:00
624 * then we will only count one hour (the one in the new
625 * day). That is the right thing
627 diff = request->timestamp - data->last_reset;
628 counter.user_counter += (count_vp->lvalue < diff) ? count_vp->lvalue : diff;
630 } else if (count_vp->type == PW_TYPE_INTEGER) {
632 * Integers get counted, without worrying about
635 counter.user_counter += count_vp->lvalue;
639 * The attribute is NOT an integer, just count once
640 * more that we've seen it.
642 counter.user_counter++;
645 DEBUG("rlm_counter: User=%s, New Counter=%d.",request->username->strvalue,counter.user_counter);
646 count_datum.dptr = (rad_counter *) &counter;
647 count_datum.dsize = sizeof(rad_counter);
649 pthread_mutex_lock(&data->mutex);
650 rcode = gdbm_store(data->gdbm, key_datum, count_datum, GDBM_REPLACE);
651 pthread_mutex_unlock(&data->mutex);
653 radlog(L_ERR, "rlm_counter: Failed storing data to %s: %s",
654 data->filename, gdbm_strerror(gdbm_errno));
655 return RLM_MODULE_FAIL;
658 return RLM_MODULE_OK;
662 * Find the named user in this modules database. Create the set
663 * of attribute-value pairs to check and reply with for this user
664 * from the database. The authentication code only needs to check
665 * the password, the rest is done here.
667 static int counter_authorize(void *instance, REQUEST *request)
669 rlm_counter_t *data = (rlm_counter_t *) instance;
670 int ret=RLM_MODULE_NOOP;
675 VALUE_PAIR *key_vp, *check_vp;
676 VALUE_PAIR *reply_item;
679 /* quiet the compiler */
684 * Before doing anything else, see if we have to reset
687 if (data->reset_time && (data->reset_time <= request->timestamp)) {
690 data->last_reset = data->reset_time;
691 find_next_reset(data,request->timestamp);
692 pthread_mutex_lock(&data->mutex);
693 ret2 = reset_db(data);
694 pthread_mutex_unlock(&data->mutex);
695 if (ret2 != RLM_MODULE_OK)
701 * Look for the key. User-Name is special. It means
702 * The REAL username, after stripping.
704 DEBUG2("rlm_counter: Entering module authorize code");
705 key_vp = (data->key_attr == PW_USER_NAME) ? request->username : pairfind(request->packet->vps, data->key_attr);
706 if (key_vp == NULL) {
707 DEBUG2("rlm_counter: Could not find Key value pair");
712 * Look for the check item
714 if ((check_vp= pairfind(request->config_items, data->check_attr)) == NULL) {
715 DEBUG2("rlm_counter: Could not find Check item value pair");
719 key_datum.dptr = key_vp->strvalue;
720 key_datum.dsize = key_vp->length;
727 counter.user_counter = 0;
729 pthread_mutex_lock(&data->mutex);
730 count_datum = gdbm_fetch(data->gdbm, key_datum);
731 pthread_mutex_unlock(&data->mutex);
732 if (count_datum.dptr != NULL){
733 memcpy(&counter, count_datum.dptr, sizeof(rad_counter));
734 free(count_datum.dptr);
738 * Check if check item > counter
740 res=check_vp->lvalue - counter.user_counter;
742 if (data->count_attr == PW_ACCT_SESSION_TIME) {
744 * Do the following only if the count attribute is
749 * We are assuming that simultaneous-use=1. But
750 * even if that does not happen then our user
751 * could login at max for 2*max-usage-time Is
756 * User is allowed, but set Session-Timeout.
757 * Stolen from main/auth.c
761 * If we are near a reset then add the next
762 * limit, so that the user will not need to
765 if (data->reset_time && (
766 res >= (data->reset_time - request->timestamp))) {
767 res += check_vp->lvalue;
770 if ((reply_item = pairfind(request->reply->vps, PW_SESSION_TIMEOUT)) != NULL) {
771 if (reply_item->lvalue > res)
772 reply_item->lvalue = res;
774 if ((reply_item = paircreate(PW_SESSION_TIMEOUT, PW_TYPE_INTEGER)) == NULL) {
775 radlog(L_ERR|L_CONS, "no memory");
776 return RLM_MODULE_NOOP;
778 reply_item->lvalue = res;
779 pairadd(&request->reply->vps, reply_item);
785 DEBUG2("rlm_counter: (Check item - counter) is greater than zero");
786 DEBUG2("rlm_counter: Authorized user %s, check_item=%d, counter=%d",
787 key_vp->strvalue,check_vp->lvalue,counter.user_counter);
788 DEBUG2("rlm_counter: Sent Reply-Item for user %s, Type=Session-Timeout, value=%d",
789 key_vp->strvalue,res);
792 char module_fmsg[MAX_STRING_LEN];
793 VALUE_PAIR *module_fmsg_vp;
796 * User is denied access, send back a reply message
798 sprintf(msg, "Your maximum %s usage time has been reached", data->reset);
799 reply_item=pairmake("Reply-Message", msg, T_OP_EQ);
800 pairadd(&request->reply->vps, reply_item);
802 snprintf(module_fmsg,sizeof(module_fmsg), "rlm_counter: Maximum %s usage time reached", data->reset);
803 module_fmsg_vp = pairmake("Module-Failure-Message", module_fmsg, T_OP_EQ);
804 pairadd(&request->packet->vps, module_fmsg_vp);
806 ret=RLM_MODULE_REJECT;
808 DEBUG2("rlm_counter: Rejected user %s, check_item=%d, counter=%d",
809 key_vp->strvalue,check_vp->lvalue,counter.user_counter);
815 static int counter_detach(void *instance)
817 rlm_counter_t *data = (rlm_counter_t *) instance;
819 paircompare_unregister(data->dict_attr, counter_cmp);
820 gdbm_close(data->gdbm);
821 free(data->filename);
823 free(data->key_name);
824 free(data->count_attribute);
825 free(data->counter_name);
826 pthread_mutex_destroy(&data->mutex);
833 * The module name should be the only globally exported symbol.
834 * That is, everything else should be 'static'.
836 * If the module needs to temporarily modify it's instantiation
837 * data, the type should be changed to RLM_TYPE_THREAD_UNSAFE.
838 * The server will then take care of ensuring that the module
839 * is single-threaded.
841 module_t rlm_counter = {
843 RLM_TYPE_THREAD_SAFE, /* type */
844 NULL, /* initialization */
845 counter_instantiate, /* instantiation */
847 NULL, /* authentication */
848 counter_authorize, /* authorization */
849 NULL, /* preaccounting */
850 counter_accounting, /* accounting */
851 NULL, /* checksimul */
852 NULL, /* pre-proxy */
853 NULL, /* post-proxy */
856 counter_detach, /* detach */