trunk/src/conf_class.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

/*! \file
 * \brief Configuration managment for class{} blocks
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "ircd_defs.h"
#include "balloc.h"
#include "conf.h"
#include "s_serv.h"
#include "resv.h"
#include "channel.h"
#include "client.h"
#include "event.h"
#include "hook.h"
#include "irc_string.h"
#include "s_bsd.h"
#include "ircd.h"
#include "listener.h"
#include "hostmask.h"
#include "modules.h"
#include "numeric.h"
#include "fdlist.h"
#include "log.h"
#include "send.h"
#include "s_gline.h"
#include "memory.h"
#include "irc_res.h"
#include "userhost.h"
#include "s_user.h"
#include "channel_mode.h"
#include "parse.h"
#include "s_misc.h"
#include "conf_db.h"


struct ClassItem *class_default;

static dlink_list class_list = { NULL, NULL, 0 };


const dlink_list *
class_get_list(void)
{
  return &class_list;
}

struct ClassItem *
class_make(void)
{
  struct ClassItem *class = MyMalloc(sizeof(*class));

  dlinkAdd(class, &class->node, &class_list);

  return class;
}

void
class_free(struct ClassItem *class)
{
  assert(class);
  assert(class->active    == 0);
  assert(class->ref_count == 0);

  dlinkDelete(&class->node, &class_list);
  MyFree(class->name);
  MyFree(class);
}

void
class_init(void)
{
  class_default = class_make();

  DupString(class_default->name, "default");

  class_default->active    = 1;
  class_default->con_freq  = DEFAULT_CONNECTFREQUENCY;
  class_default->ping_freq = DEFAULT_PINGFREQUENCY;
  class_default->max_total = MAXIMUM_LINKS_DEFAULT;
  class_default->max_sendq = DEFAULT_SENDQ;
  class_default->max_recvq = DEFAULT_RECVQ;

  client_check_cb = register_callback("check_client", check_client);
}

const char *
get_client_class(const dlink_list *const list)
{
  const dlink_node *ptr = NULL;

  if ((ptr = list->head)) {
    const struct MaskItem *conf = ptr->data;

    assert(conf->class);
    assert(conf->type & (CONF_OPERATOR | CONF_CLIENT | CONF_SERVER));

    return conf->class->name;
  }

  return class_default->name;
}

unsigned int
get_client_ping(const dlink_list *const list, int *pingwarn)
{
  const dlink_node *ptr = NULL;
  int ping = 0;

  if ((ptr = list->head)) {
    const struct MaskItem *conf = ptr->data;

    assert(aconf->class);
    assert(aconf->type & (CONF_OPERATOR | CONF_CLIENT | CONF_SERVER));

    ping = get_conf_ping(conf, pingwarn);
    if (ping > 0)
      return ping;
  }

  return class_default->ping_freq;
}

unsigned int
get_sendq(const dlink_list *const list)
{
  const dlink_node *ptr = NULL;

  if ((ptr = list->head)) {
    const struct MaskItem *conf = ptr->data;

    assert(conf->class);
    assert(conf->type & (CONF_OPERATOR | CONF_CLIENT | CONF_SERVER));

    return conf->class->max_sendq;
  }

  return class_default->max_sendq;
}

unsigned int
get_recvq(const dlink_list *const list)
{
  const dlink_node *ptr = NULL;

  if ((ptr = list->head)) {
    const struct MaskItem *conf = ptr->data;

    assert(conf->class);
    assert(conf->type & (CONF_OPERATOR | CONF_CLIENT | CONF_SERVER));

    return conf->class->max_recvq;
  }

  return class_default->max_recvq;
}

/*
 * inputs       - Integer (Number of class)
 * output       - Pointer to ClassItem struct. Non-NULL expected
 * side effects - NONE
 */
struct ClassItem *
class_find(const char *name, int active)
{
  dlink_node *ptr = NULL;

  DLINK_FOREACH(ptr, class_list.head) {
    struct ClassItem *class = ptr->data;

    if (!irccmp(class->name, name))
      return active && !class->active ? NULL : class;
  }

  return NULL;
}

/*
 * We don't delete the class table, rather mark all entries for deletion.
 * The table is cleaned up by delete_marked_classes. - avalon
 */
void
class_mark_for_deletion(void)
{
  dlink_node *ptr = NULL;

  DLINK_FOREACH(ptr, class_list.head)
  {
    struct ClassItem *class = ptr->data;

    if (class != class_default)
      class->active = 0;
  }
}

void
class_delete_marked(void)
{
  dlink_node *ptr = NULL, *ptr_next = NULL;

  DLINK_FOREACH_SAFE(ptr, ptr_next, class_list.head) {
    struct ClassItem *class = ptr->data;

    if (!class->active && !class->ref_count)
    {
      destroy_cidr_class(class);
      class_free(class);
    }
  }
}

/*
 * cidr_limit_reached
 *
 * inputs       - int flag allowing over_rule of limits
 *              - pointer to the ip to be added
 *              - pointer to the class
 * output       - non zero if limit reached
 *                0 if limit not reached
 * side effects -
 */
int
cidr_limit_reached(int over_rule,
                   struct irc_ssaddr *ip, struct ClassItem *class)
{
  dlink_node *ptr = NULL;
  struct CidrItem *cidr = NULL;

  if (class->number_per_cidr <= 0)
    return 0;

  if (ip->ss.ss_family == AF_INET)
  {
    if (class->cidr_bitlen_ipv4 <= 0)
      return 0;

    DLINK_FOREACH(ptr, class->list_ipv4.head)
    {
      cidr = ptr->data;
      if (match_ipv4(ip, &cidr->mask, class->cidr_bitlen_ipv4))
      {
        if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
          return -1;
        cidr->number_on_this_cidr++;
        return 0;
      }
    }
    cidr = MyMalloc(sizeof(struct CidrItem));
    cidr->number_on_this_cidr = 1;
    cidr->mask = *ip;
    mask_addr(&cidr->mask, class->cidr_bitlen_ipv4);
    dlinkAdd(cidr, &cidr->node, &class->list_ipv4);
  }
#ifdef IPV6
  else if (class->cidr_bitlen_ipv6 > 0)
  {
    DLINK_FOREACH(ptr, class->list_ipv6.head)
    {
      cidr = ptr->data;
      if (match_ipv6(ip, &cidr->mask, class->cidr_bitlen_ipv6))
      {
        if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
          return -1;
        cidr->number_on_this_cidr++;
        return 0;
      }
    }
    cidr = MyMalloc(sizeof(struct CidrItem));
    cidr->number_on_this_cidr = 1;
    cidr->mask = *ip;
    mask_addr(&cidr->mask, class->cidr_bitlen_ipv6);
    dlinkAdd(cidr, &cidr->node, &class->list_ipv6);
  }
#endif
  return 0;
}

/*
 * remove_from_cidr_check
 *
 * inputs       - pointer to the ip to be removed
 *              - pointer to the class
 * output       - NONE
 * side effects -
 */
void
remove_from_cidr_check(struct irc_ssaddr *ip, struct ClassItem *aclass)
{
  dlink_node *ptr = NULL;
  dlink_node *next_ptr = NULL;
  struct CidrItem *cidr;

  if (aclass->number_per_cidr == 0)
    return;

  if (ip->ss.ss_family == AF_INET)
  {
    if (aclass->cidr_bitlen_ipv4 <= 0)
      return;

    DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv4.head)
    {
      cidr = ptr->data;
      if (match_ipv4(ip, &cidr->mask, aclass->cidr_bitlen_ipv4))
      {
        cidr->number_on_this_cidr--;
        if (cidr->number_on_this_cidr == 0)
        {
          dlinkDelete(ptr, &aclass->list_ipv4);
          MyFree(cidr);
          return;
        }
      }
    }
  }
#ifdef IPV6
  else if (aclass->cidr_bitlen_ipv6 > 0)
  {
    DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv6.head)
    {
      cidr = ptr->data;
      if (match_ipv6(ip, &cidr->mask, aclass->cidr_bitlen_ipv6))
      {
        cidr->number_on_this_cidr--;
        if (cidr->number_on_this_cidr == 0)
        {
          dlinkDelete(ptr, &aclass->list_ipv6);
          MyFree(cidr);
          return;
        }
      }
    }
  }
#endif
}

static void
rebuild_cidr_list(int aftype, struct ClassItem *oldcl, struct ClassItem *newcl,
                  dlink_list *old_list, dlink_list *new_list, int changed)
{
  dlink_node *ptr;
  struct Client *client_p;
  struct MaskItem *conf;

  if (!changed)
  {
    *new_list = *old_list;
    old_list->head = old_list->tail = NULL;
    old_list->length = 0;
    return;
  }

  DLINK_FOREACH(ptr, local_client_list.head)
  {
    client_p = ptr->data;
    if (client_p->localClient->aftype != aftype)
      continue;
    if (dlink_list_length(&client_p->localClient->confs) == 0)
      continue;

    conf = client_p->localClient->confs.tail->data;
    if (conf->type == CONF_CLIENT)
      if (conf->class == oldcl)
        cidr_limit_reached(1, &client_p->localClient->ip, newcl);
  }
}

/*
 * rebuild_cidr_class
 *
 * inputs       - pointer to old conf
 *              - pointer to new_class
 * output       - none
 * side effects - rebuilds the class link list of cidr blocks
 */
void
rebuild_cidr_class(struct ClassItem *old_class, struct ClassItem *new_class)
{
  if (old_class->number_per_cidr > 0 && new_class->number_per_cidr > 0)
  {
    if (old_class->cidr_bitlen_ipv4 > 0 && new_class->cidr_bitlen_ipv4 > 0)
      rebuild_cidr_list(AF_INET, old_class, new_class,
                        &old_class->list_ipv4, &new_class->list_ipv4,
                        old_class->cidr_bitlen_ipv4 != new_class->cidr_bitlen_ipv4);

#ifdef IPV6
    if (old_class->cidr_bitlen_ipv6 > 0 && new_class->cidr_bitlen_ipv6 > 0)
      rebuild_cidr_list(AF_INET6, old_class, new_class,
                        &old_class->list_ipv6, &new_class->list_ipv6,
                        old_class->cidr_bitlen_ipv6 != new_class->cidr_bitlen_ipv6);
#endif
  }

  destroy_cidr_class(old_class);
}

/*
 * destroy_cidr_list
 *
 * inputs       - pointer to class dlink list of cidr blocks
 * output       - none
 * side effects - completely destroys the class link list of cidr blocks
 */
static void
destroy_cidr_list(dlink_list *list)
{
  dlink_node *ptr = NULL, *next_ptr = NULL;

  DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
  {
    dlinkDelete(ptr, list);
    MyFree(ptr->data);
  }
}

/*
 * destroy_cidr_class
 *
 * inputs       - pointer to class
 * output       - none
 * side effects - completely destroys the class link list of cidr blocks
 */
void
destroy_cidr_class(struct ClassItem *class)
{
  destroy_cidr_list(&class->list_ipv4);
  destroy_cidr_list(&class->list_ipv6);
}
Revision:	1636
Committed:	Sun Nov 4 17:09:47 2012 UTC (11 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	10293 byte(s)
Log Message:	- Cleanup configuration subsystem - Fixed broken CIDR support for /challenge
#	User	Rev	Content
1	michael	1633	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			*
4			* Copyright (C) 2002 by the past and present ircd coders, and others.
5			*
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.
10			*
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.
15			*
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
19			* USA
20			*/
21
22			/*! \file
23			* \brief Configuration managment for class{} blocks
24	michael	1635	* \version $Id$
25	michael	1633	*/
26
27			#include "stdinc.h"
28			#include "list.h"
29			#include "ircd_defs.h"
30			#include "balloc.h"
31			#include "conf.h"
32			#include "s_serv.h"
33			#include "resv.h"
34			#include "channel.h"
35			#include "client.h"
36			#include "event.h"
37			#include "hook.h"
38			#include "irc_string.h"
39			#include "s_bsd.h"
40			#include "ircd.h"
41			#include "listener.h"
42			#include "hostmask.h"
43			#include "modules.h"
44			#include "numeric.h"
45			#include "fdlist.h"
46			#include "log.h"
47			#include "send.h"
48			#include "s_gline.h"
49			#include "memory.h"
50			#include "irc_res.h"
51			#include "userhost.h"
52			#include "s_user.h"
53			#include "channel_mode.h"
54			#include "parse.h"
55			#include "s_misc.h"
56			#include "conf_db.h"
57
58
59			struct ClassItem *class_default;
60
61			static dlink_list class_list = { NULL, NULL, 0 };
62
63
64			const dlink_list *
65			class_get_list(void)
66			{
67			return &class_list;
68			}
69
70			struct ClassItem *
71			class_make(void)
72			{
73			struct ClassItem class = MyMalloc(sizeof(class));
74
75			dlinkAdd(class, &class->node, &class_list);
76
77			return class;
78			}
79
80			void
81			class_free(struct ClassItem *class)
82			{
83			assert(class);
84			assert(class->active == 0);
85			assert(class->ref_count == 0);
86
87			dlinkDelete(&class->node, &class_list);
88			MyFree(class->name);
89			MyFree(class);
90			}
91
92			void
93			class_init(void)
94			{
95			class_default = class_make();
96
97			DupString(class_default->name, "default");
98	michael	1636
99			class_default->active = 1;
100	michael	1633	class_default->con_freq = DEFAULT_CONNECTFREQUENCY;
101			class_default->ping_freq = DEFAULT_PINGFREQUENCY;
102			class_default->max_total = MAXIMUM_LINKS_DEFAULT;
103			class_default->max_sendq = DEFAULT_SENDQ;
104			class_default->max_recvq = DEFAULT_RECVQ;
105
106			client_check_cb = register_callback("check_client", check_client);
107			}
108
109			const char *
110			get_client_class(const dlink_list *const list)
111			{
112			const dlink_node *ptr = NULL;
113
114			if ((ptr = list->head)) {
115			const struct MaskItem *conf = ptr->data;
116
117			assert(conf->class);
118			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
119
120			return conf->class->name;
121			}
122
123			return class_default->name;
124			}
125
126			unsigned int
127			get_client_ping(const dlink_list const list, int pingwarn)
128			{
129			const dlink_node *ptr = NULL;
130			int ping = 0;
131
132			if ((ptr = list->head)) {
133			const struct MaskItem *conf = ptr->data;
134
135			assert(aconf->class);
136			assert(aconf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
137
138			ping = get_conf_ping(conf, pingwarn);
139			if (ping > 0)
140			return ping;
141			}
142
143			return class_default->ping_freq;
144			}
145
146			unsigned int
147			get_sendq(const dlink_list *const list)
148			{
149			const dlink_node *ptr = NULL;
150
151			if ((ptr = list->head)) {
152			const struct MaskItem *conf = ptr->data;
153
154			assert(conf->class);
155			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
156
157			return conf->class->max_sendq;
158			}
159
160			return class_default->max_sendq;
161			}
162
163			unsigned int
164			get_recvq(const dlink_list *const list)
165			{
166			const dlink_node *ptr = NULL;
167
168			if ((ptr = list->head)) {
169			const struct MaskItem *conf = ptr->data;
170
171			assert(conf->class);
172			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
173
174			return conf->class->max_recvq;
175			}
176
177			return class_default->max_recvq;
178			}
179
180			/*
181			* inputs - Integer (Number of class)
182			* output - Pointer to ClassItem struct. Non-NULL expected
183			* side effects - NONE
184			*/
185			struct ClassItem *
186			class_find(const char *name, int active)
187			{
188			dlink_node *ptr = NULL;
189
190			DLINK_FOREACH(ptr, class_list.head) {
191			struct ClassItem *class = ptr->data;
192
193			if (!irccmp(class->name, name))
194			return active && !class->active ? NULL : class;
195			}
196
197			return NULL;
198			}
199
200			/*
201			* We don't delete the class table, rather mark all entries for deletion.
202			* The table is cleaned up by delete_marked_classes. - avalon
203			*/
204			void
205			class_mark_for_deletion(void)
206			{
207			dlink_node *ptr = NULL;
208
209			DLINK_FOREACH(ptr, class_list.head)
210			{
211			struct ClassItem *class = ptr->data;
212
213			if (class != class_default)
214			class->active = 0;
215			}
216			}
217
218			void
219			class_delete_marked(void)
220			{
221			dlink_node ptr = NULL, ptr_next = NULL;
222
223			DLINK_FOREACH_SAFE(ptr, ptr_next, class_list.head) {
224			struct ClassItem *class = ptr->data;
225
226			if (!class->active && !class->ref_count)
227			{
228			destroy_cidr_class(class);
229			class_free(class);
230			}
231			}
232			}
233
234			/*
235			* cidr_limit_reached
236			*
237			* inputs - int flag allowing over_rule of limits
238			* - pointer to the ip to be added
239			* - pointer to the class
240			* output - non zero if limit reached
241			* 0 if limit not reached
242			* side effects -
243			*/
244			int
245			cidr_limit_reached(int over_rule,
246			struct irc_ssaddr ip, struct ClassItem class)
247			{
248			dlink_node *ptr = NULL;
249			struct CidrItem *cidr = NULL;
250
251			if (class->number_per_cidr <= 0)
252			return 0;
253
254			if (ip->ss.ss_family == AF_INET)
255			{
256			if (class->cidr_bitlen_ipv4 <= 0)
257			return 0;
258
259			DLINK_FOREACH(ptr, class->list_ipv4.head)
260			{
261			cidr = ptr->data;
262			if (match_ipv4(ip, &cidr->mask, class->cidr_bitlen_ipv4))
263			{
264			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
265			return -1;
266			cidr->number_on_this_cidr++;
267			return 0;
268			}
269			}
270			cidr = MyMalloc(sizeof(struct CidrItem));
271			cidr->number_on_this_cidr = 1;
272			cidr->mask = *ip;
273			mask_addr(&cidr->mask, class->cidr_bitlen_ipv4);
274			dlinkAdd(cidr, &cidr->node, &class->list_ipv4);
275			}
276			#ifdef IPV6
277			else if (class->cidr_bitlen_ipv6 > 0)
278			{
279			DLINK_FOREACH(ptr, class->list_ipv6.head)
280			{
281			cidr = ptr->data;
282			if (match_ipv6(ip, &cidr->mask, class->cidr_bitlen_ipv6))
283			{
284			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
285			return -1;
286			cidr->number_on_this_cidr++;
287			return 0;
288			}
289			}
290			cidr = MyMalloc(sizeof(struct CidrItem));
291			cidr->number_on_this_cidr = 1;
292			cidr->mask = *ip;
293			mask_addr(&cidr->mask, class->cidr_bitlen_ipv6);
294			dlinkAdd(cidr, &cidr->node, &class->list_ipv6);
295			}
296			#endif
297			return 0;
298			}
299
300			/*
301			* remove_from_cidr_check
302			*
303			* inputs - pointer to the ip to be removed
304			* - pointer to the class
305			* output - NONE
306			* side effects -
307			*/
308			void
309			remove_from_cidr_check(struct irc_ssaddr ip, struct ClassItem aclass)
310			{
311			dlink_node *ptr = NULL;
312			dlink_node *next_ptr = NULL;
313			struct CidrItem *cidr;
314
315			if (aclass->number_per_cidr == 0)
316			return;
317
318			if (ip->ss.ss_family == AF_INET)
319			{
320			if (aclass->cidr_bitlen_ipv4 <= 0)
321			return;
322
323			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv4.head)
324			{
325			cidr = ptr->data;
326			if (match_ipv4(ip, &cidr->mask, aclass->cidr_bitlen_ipv4))
327			{
328			cidr->number_on_this_cidr--;
329			if (cidr->number_on_this_cidr == 0)
330			{
331			dlinkDelete(ptr, &aclass->list_ipv4);
332			MyFree(cidr);
333			return;
334			}
335			}
336			}
337			}
338			#ifdef IPV6
339			else if (aclass->cidr_bitlen_ipv6 > 0)
340			{
341			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv6.head)
342			{
343			cidr = ptr->data;
344			if (match_ipv6(ip, &cidr->mask, aclass->cidr_bitlen_ipv6))
345			{
346			cidr->number_on_this_cidr--;
347			if (cidr->number_on_this_cidr == 0)
348			{
349			dlinkDelete(ptr, &aclass->list_ipv6);
350			MyFree(cidr);
351			return;
352			}
353			}
354			}
355			}
356			#endif
357			}
358
359			static void
360			rebuild_cidr_list(int aftype, struct ClassItem oldcl, struct ClassItem newcl,
361			dlink_list old_list, dlink_list new_list, int changed)
362			{
363			dlink_node *ptr;
364			struct Client *client_p;
365			struct MaskItem *conf;
366
367			if (!changed)
368			{
369			new_list = old_list;
370			old_list->head = old_list->tail = NULL;
371			old_list->length = 0;
372			return;
373			}
374
375			DLINK_FOREACH(ptr, local_client_list.head)
376			{
377			client_p = ptr->data;
378			if (client_p->localClient->aftype != aftype)
379			continue;
380			if (dlink_list_length(&client_p->localClient->confs) == 0)
381			continue;
382
383			conf = client_p->localClient->confs.tail->data;
384			if (conf->type == CONF_CLIENT)
385			if (conf->class == oldcl)
386			cidr_limit_reached(1, &client_p->localClient->ip, newcl);
387			}
388			}
389
390			/*
391			* rebuild_cidr_class
392			*
393			* inputs - pointer to old conf
394			* - pointer to new_class
395			* output - none
396			* side effects - rebuilds the class link list of cidr blocks
397			*/
398			void
399			rebuild_cidr_class(struct ClassItem old_class, struct ClassItem new_class)
400			{
401			if (old_class->number_per_cidr > 0 && new_class->number_per_cidr > 0)
402			{
403			if (old_class->cidr_bitlen_ipv4 > 0 && new_class->cidr_bitlen_ipv4 > 0)
404			rebuild_cidr_list(AF_INET, old_class, new_class,
405			&old_class->list_ipv4, &new_class->list_ipv4,
406			old_class->cidr_bitlen_ipv4 != new_class->cidr_bitlen_ipv4);
407
408			#ifdef IPV6
409			if (old_class->cidr_bitlen_ipv6 > 0 && new_class->cidr_bitlen_ipv6 > 0)
410			rebuild_cidr_list(AF_INET6, old_class, new_class,
411			&old_class->list_ipv6, &new_class->list_ipv6,
412			old_class->cidr_bitlen_ipv6 != new_class->cidr_bitlen_ipv6);
413			#endif
414			}
415
416			destroy_cidr_class(old_class);
417			}
418
419			/*
420			* destroy_cidr_list
421			*
422			* inputs - pointer to class dlink list of cidr blocks
423			* output - none
424			* side effects - completely destroys the class link list of cidr blocks
425			*/
426			static void
427			destroy_cidr_list(dlink_list *list)
428			{
429			dlink_node ptr = NULL, next_ptr = NULL;
430
431			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
432			{
433			dlinkDelete(ptr, list);
434			MyFree(ptr->data);
435			}
436			}
437
438			/*
439			* destroy_cidr_class
440			*
441			* inputs - pointer to class
442			* output - none
443			* side effects - completely destroys the class link list of cidr blocks
444			*/
445			void
446			destroy_cidr_class(struct ClassItem *class)
447			{
448			destroy_cidr_list(&class->list_ipv4);
449			destroy_cidr_list(&class->list_ipv6);
450			}