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();

  class_default->name      = xstrdup("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;
}

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)
{
  const dlink_node *ptr = NULL;

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

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

    return conf->class->ping_freq;
  }

  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:	1646
Committed:	Wed Nov 7 21:02:43 2012 UTC (12 years, 9 months ago) by michael
Content type:	text/x-csrc
File size:	10151 byte(s)
Log Message:	- First pass of conf parser stabilization/cleanup
#	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	michael	1646	class_default->name = xstrdup("default");
98	michael	1636	class_default->active = 1;
99	michael	1633	class_default->con_freq = DEFAULT_CONNECTFREQUENCY;
100			class_default->ping_freq = DEFAULT_PINGFREQUENCY;
101			class_default->max_total = MAXIMUM_LINKS_DEFAULT;
102			class_default->max_sendq = DEFAULT_SENDQ;
103			class_default->max_recvq = DEFAULT_RECVQ;
104			}
105
106			const char *
107			get_client_class(const dlink_list *const list)
108			{
109			const dlink_node *ptr = NULL;
110
111			if ((ptr = list->head)) {
112			const struct MaskItem *conf = ptr->data;
113
114			assert(conf->class);
115			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
116
117			return conf->class->name;
118			}
119
120			return class_default->name;
121			}
122
123			unsigned int
124	michael	1644	get_client_ping(const dlink_list *const list)
125	michael	1633	{
126			const dlink_node *ptr = NULL;
127
128			if ((ptr = list->head)) {
129			const struct MaskItem *conf = ptr->data;
130
131			assert(aconf->class);
132			assert(aconf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
133
134	michael	1644	return conf->class->ping_freq;
135	michael	1633	}
136
137			return class_default->ping_freq;
138			}
139
140			unsigned int
141			get_sendq(const dlink_list *const list)
142			{
143			const dlink_node *ptr = NULL;
144
145			if ((ptr = list->head)) {
146			const struct MaskItem *conf = ptr->data;
147
148			assert(conf->class);
149			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
150
151			return conf->class->max_sendq;
152			}
153
154			return class_default->max_sendq;
155			}
156
157			unsigned int
158			get_recvq(const dlink_list *const list)
159			{
160			const dlink_node *ptr = NULL;
161
162			if ((ptr = list->head)) {
163			const struct MaskItem *conf = ptr->data;
164
165			assert(conf->class);
166			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
167
168			return conf->class->max_recvq;
169			}
170
171			return class_default->max_recvq;
172			}
173
174			/*
175			* inputs - Integer (Number of class)
176			* output - Pointer to ClassItem struct. Non-NULL expected
177			* side effects - NONE
178			*/
179			struct ClassItem *
180			class_find(const char *name, int active)
181			{
182			dlink_node *ptr = NULL;
183
184			DLINK_FOREACH(ptr, class_list.head) {
185			struct ClassItem *class = ptr->data;
186
187			if (!irccmp(class->name, name))
188			return active && !class->active ? NULL : class;
189			}
190
191			return NULL;
192			}
193
194			/*
195			* We don't delete the class table, rather mark all entries for deletion.
196			* The table is cleaned up by delete_marked_classes. - avalon
197			*/
198			void
199			class_mark_for_deletion(void)
200			{
201			dlink_node *ptr = NULL;
202
203			DLINK_FOREACH(ptr, class_list.head)
204			{
205			struct ClassItem *class = ptr->data;
206
207			if (class != class_default)
208			class->active = 0;
209			}
210			}
211
212			void
213			class_delete_marked(void)
214			{
215			dlink_node ptr = NULL, ptr_next = NULL;
216
217			DLINK_FOREACH_SAFE(ptr, ptr_next, class_list.head) {
218			struct ClassItem *class = ptr->data;
219
220			if (!class->active && !class->ref_count)
221			{
222			destroy_cidr_class(class);
223			class_free(class);
224			}
225			}
226			}
227
228			/*
229			* cidr_limit_reached
230			*
231			* inputs - int flag allowing over_rule of limits
232			* - pointer to the ip to be added
233			* - pointer to the class
234			* output - non zero if limit reached
235			* 0 if limit not reached
236			* side effects -
237			*/
238			int
239			cidr_limit_reached(int over_rule,
240			struct irc_ssaddr ip, struct ClassItem class)
241			{
242			dlink_node *ptr = NULL;
243			struct CidrItem *cidr = NULL;
244
245	michael	1644	if (class->number_per_cidr == 0)
246	michael	1633	return 0;
247
248			if (ip->ss.ss_family == AF_INET)
249			{
250	michael	1644	if (class->cidr_bitlen_ipv4 == 0)
251	michael	1633	return 0;
252
253			DLINK_FOREACH(ptr, class->list_ipv4.head)
254			{
255			cidr = ptr->data;
256			if (match_ipv4(ip, &cidr->mask, class->cidr_bitlen_ipv4))
257			{
258			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
259			return -1;
260			cidr->number_on_this_cidr++;
261			return 0;
262			}
263			}
264			cidr = MyMalloc(sizeof(struct CidrItem));
265			cidr->number_on_this_cidr = 1;
266			cidr->mask = *ip;
267			mask_addr(&cidr->mask, class->cidr_bitlen_ipv4);
268			dlinkAdd(cidr, &cidr->node, &class->list_ipv4);
269			}
270			#ifdef IPV6
271			else if (class->cidr_bitlen_ipv6 > 0)
272			{
273			DLINK_FOREACH(ptr, class->list_ipv6.head)
274			{
275			cidr = ptr->data;
276			if (match_ipv6(ip, &cidr->mask, class->cidr_bitlen_ipv6))
277			{
278			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
279			return -1;
280			cidr->number_on_this_cidr++;
281			return 0;
282			}
283			}
284			cidr = MyMalloc(sizeof(struct CidrItem));
285			cidr->number_on_this_cidr = 1;
286			cidr->mask = *ip;
287			mask_addr(&cidr->mask, class->cidr_bitlen_ipv6);
288			dlinkAdd(cidr, &cidr->node, &class->list_ipv6);
289			}
290			#endif
291			return 0;
292			}
293
294			/*
295			* remove_from_cidr_check
296			*
297			* inputs - pointer to the ip to be removed
298			* - pointer to the class
299			* output - NONE
300			* side effects -
301			*/
302			void
303			remove_from_cidr_check(struct irc_ssaddr ip, struct ClassItem aclass)
304			{
305			dlink_node *ptr = NULL;
306			dlink_node *next_ptr = NULL;
307			struct CidrItem *cidr;
308
309			if (aclass->number_per_cidr == 0)
310			return;
311
312			if (ip->ss.ss_family == AF_INET)
313			{
314	michael	1644	if (aclass->cidr_bitlen_ipv4 == 0)
315	michael	1633	return;
316
317			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv4.head)
318			{
319			cidr = ptr->data;
320			if (match_ipv4(ip, &cidr->mask, aclass->cidr_bitlen_ipv4))
321			{
322			cidr->number_on_this_cidr--;
323			if (cidr->number_on_this_cidr == 0)
324			{
325			dlinkDelete(ptr, &aclass->list_ipv4);
326			MyFree(cidr);
327			return;
328			}
329			}
330			}
331			}
332			#ifdef IPV6
333			else if (aclass->cidr_bitlen_ipv6 > 0)
334			{
335			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv6.head)
336			{
337			cidr = ptr->data;
338			if (match_ipv6(ip, &cidr->mask, aclass->cidr_bitlen_ipv6))
339			{
340			cidr->number_on_this_cidr--;
341			if (cidr->number_on_this_cidr == 0)
342			{
343			dlinkDelete(ptr, &aclass->list_ipv6);
344			MyFree(cidr);
345			return;
346			}
347			}
348			}
349			}
350			#endif
351			}
352
353			static void
354			rebuild_cidr_list(int aftype, struct ClassItem oldcl, struct ClassItem newcl,
355			dlink_list old_list, dlink_list new_list, int changed)
356			{
357			dlink_node *ptr;
358			struct Client *client_p;
359			struct MaskItem *conf;
360
361			if (!changed)
362			{
363			new_list = old_list;
364			old_list->head = old_list->tail = NULL;
365			old_list->length = 0;
366			return;
367			}
368
369			DLINK_FOREACH(ptr, local_client_list.head)
370			{
371			client_p = ptr->data;
372			if (client_p->localClient->aftype != aftype)
373			continue;
374			if (dlink_list_length(&client_p->localClient->confs) == 0)
375			continue;
376
377			conf = client_p->localClient->confs.tail->data;
378			if (conf->type == CONF_CLIENT)
379			if (conf->class == oldcl)
380			cidr_limit_reached(1, &client_p->localClient->ip, newcl);
381			}
382			}
383
384			/*
385			* rebuild_cidr_class
386			*
387			* inputs - pointer to old conf
388			* - pointer to new_class
389			* output - none
390			* side effects - rebuilds the class link list of cidr blocks
391			*/
392			void
393			rebuild_cidr_class(struct ClassItem old_class, struct ClassItem new_class)
394			{
395			if (old_class->number_per_cidr > 0 && new_class->number_per_cidr > 0)
396			{
397			if (old_class->cidr_bitlen_ipv4 > 0 && new_class->cidr_bitlen_ipv4 > 0)
398			rebuild_cidr_list(AF_INET, old_class, new_class,
399			&old_class->list_ipv4, &new_class->list_ipv4,
400			old_class->cidr_bitlen_ipv4 != new_class->cidr_bitlen_ipv4);
401
402			#ifdef IPV6
403			if (old_class->cidr_bitlen_ipv6 > 0 && new_class->cidr_bitlen_ipv6 > 0)
404			rebuild_cidr_list(AF_INET6, old_class, new_class,
405			&old_class->list_ipv6, &new_class->list_ipv6,
406			old_class->cidr_bitlen_ipv6 != new_class->cidr_bitlen_ipv6);
407			#endif
408			}
409
410			destroy_cidr_class(old_class);
411			}
412
413			/*
414			* destroy_cidr_list
415			*
416			* inputs - pointer to class dlink list of cidr blocks
417			* output - none
418			* side effects - completely destroys the class link list of cidr blocks
419			*/
420			static void
421			destroy_cidr_list(dlink_list *list)
422			{
423			dlink_node ptr = NULL, next_ptr = NULL;
424
425			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
426			{
427			dlinkDelete(ptr, list);
428			MyFree(ptr->data);
429			}
430			}
431
432			/*
433			* destroy_cidr_class
434			*
435			* inputs - pointer to class
436			* output - none
437			* side effects - completely destroys the class link list of cidr blocks
438			*/
439			void
440			destroy_cidr_class(struct ClassItem *class)
441			{
442			destroy_cidr_list(&class->list_ipv4);
443			destroy_cidr_list(&class->list_ipv6);
444			}