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;
}

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:	1644
Committed:	Tue Nov 6 22:20:16 2012 UTC (13 years, 8 months ago) by michael
Content type:	text/x-csrc
File size:	10148 byte(s)
Log Message:	- More config subsystem cleanups
#	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
107			const char *
108			get_client_class(const dlink_list *const list)
109			{
110			const dlink_node *ptr = NULL;
111
112			if ((ptr = list->head)) {
113			const struct MaskItem *conf = ptr->data;
114
115			assert(conf->class);
116			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
117
118			return conf->class->name;
119			}
120
121			return class_default->name;
122			}
123
124			unsigned int
125	michael	1644	get_client_ping(const dlink_list *const list)
126	michael	1633	{
127			const dlink_node *ptr = NULL;
128
129			if ((ptr = list->head)) {
130			const struct MaskItem *conf = ptr->data;
131
132			assert(aconf->class);
133			assert(aconf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
134
135	michael	1644	return conf->class->ping_freq;
136	michael	1633	}
137
138			return class_default->ping_freq;
139			}
140
141			unsigned int
142			get_sendq(const dlink_list *const list)
143			{
144			const dlink_node *ptr = NULL;
145
146			if ((ptr = list->head)) {
147			const struct MaskItem *conf = ptr->data;
148
149			assert(conf->class);
150			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
151
152			return conf->class->max_sendq;
153			}
154
155			return class_default->max_sendq;
156			}
157
158			unsigned int
159			get_recvq(const dlink_list *const list)
160			{
161			const dlink_node *ptr = NULL;
162
163			if ((ptr = list->head)) {
164			const struct MaskItem *conf = ptr->data;
165
166			assert(conf->class);
167			assert(conf->type & (CONF_OPERATOR \| CONF_CLIENT \| CONF_SERVER));
168
169			return conf->class->max_recvq;
170			}
171
172			return class_default->max_recvq;
173			}
174
175			/*
176			* inputs - Integer (Number of class)
177			* output - Pointer to ClassItem struct. Non-NULL expected
178			* side effects - NONE
179			*/
180			struct ClassItem *
181			class_find(const char *name, int active)
182			{
183			dlink_node *ptr = NULL;
184
185			DLINK_FOREACH(ptr, class_list.head) {
186			struct ClassItem *class = ptr->data;
187
188			if (!irccmp(class->name, name))
189			return active && !class->active ? NULL : class;
190			}
191
192			return NULL;
193			}
194
195			/*
196			* We don't delete the class table, rather mark all entries for deletion.
197			* The table is cleaned up by delete_marked_classes. - avalon
198			*/
199			void
200			class_mark_for_deletion(void)
201			{
202			dlink_node *ptr = NULL;
203
204			DLINK_FOREACH(ptr, class_list.head)
205			{
206			struct ClassItem *class = ptr->data;
207
208			if (class != class_default)
209			class->active = 0;
210			}
211			}
212
213			void
214			class_delete_marked(void)
215			{
216			dlink_node ptr = NULL, ptr_next = NULL;
217
218			DLINK_FOREACH_SAFE(ptr, ptr_next, class_list.head) {
219			struct ClassItem *class = ptr->data;
220
221			if (!class->active && !class->ref_count)
222			{
223			destroy_cidr_class(class);
224			class_free(class);
225			}
226			}
227			}
228
229			/*
230			* cidr_limit_reached
231			*
232			* inputs - int flag allowing over_rule of limits
233			* - pointer to the ip to be added
234			* - pointer to the class
235			* output - non zero if limit reached
236			* 0 if limit not reached
237			* side effects -
238			*/
239			int
240			cidr_limit_reached(int over_rule,
241			struct irc_ssaddr ip, struct ClassItem class)
242			{
243			dlink_node *ptr = NULL;
244			struct CidrItem *cidr = NULL;
245
246	michael	1644	if (class->number_per_cidr == 0)
247	michael	1633	return 0;
248
249			if (ip->ss.ss_family == AF_INET)
250			{
251	michael	1644	if (class->cidr_bitlen_ipv4 == 0)
252	michael	1633	return 0;
253
254			DLINK_FOREACH(ptr, class->list_ipv4.head)
255			{
256			cidr = ptr->data;
257			if (match_ipv4(ip, &cidr->mask, class->cidr_bitlen_ipv4))
258			{
259			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
260			return -1;
261			cidr->number_on_this_cidr++;
262			return 0;
263			}
264			}
265			cidr = MyMalloc(sizeof(struct CidrItem));
266			cidr->number_on_this_cidr = 1;
267			cidr->mask = *ip;
268			mask_addr(&cidr->mask, class->cidr_bitlen_ipv4);
269			dlinkAdd(cidr, &cidr->node, &class->list_ipv4);
270			}
271			#ifdef IPV6
272			else if (class->cidr_bitlen_ipv6 > 0)
273			{
274			DLINK_FOREACH(ptr, class->list_ipv6.head)
275			{
276			cidr = ptr->data;
277			if (match_ipv6(ip, &cidr->mask, class->cidr_bitlen_ipv6))
278			{
279			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
280			return -1;
281			cidr->number_on_this_cidr++;
282			return 0;
283			}
284			}
285			cidr = MyMalloc(sizeof(struct CidrItem));
286			cidr->number_on_this_cidr = 1;
287			cidr->mask = *ip;
288			mask_addr(&cidr->mask, class->cidr_bitlen_ipv6);
289			dlinkAdd(cidr, &cidr->node, &class->list_ipv6);
290			}
291			#endif
292			return 0;
293			}
294
295			/*
296			* remove_from_cidr_check
297			*
298			* inputs - pointer to the ip to be removed
299			* - pointer to the class
300			* output - NONE
301			* side effects -
302			*/
303			void
304			remove_from_cidr_check(struct irc_ssaddr ip, struct ClassItem aclass)
305			{
306			dlink_node *ptr = NULL;
307			dlink_node *next_ptr = NULL;
308			struct CidrItem *cidr;
309
310			if (aclass->number_per_cidr == 0)
311			return;
312
313			if (ip->ss.ss_family == AF_INET)
314			{
315	michael	1644	if (aclass->cidr_bitlen_ipv4 == 0)
316	michael	1633	return;
317
318			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv4.head)
319			{
320			cidr = ptr->data;
321			if (match_ipv4(ip, &cidr->mask, aclass->cidr_bitlen_ipv4))
322			{
323			cidr->number_on_this_cidr--;
324			if (cidr->number_on_this_cidr == 0)
325			{
326			dlinkDelete(ptr, &aclass->list_ipv4);
327			MyFree(cidr);
328			return;
329			}
330			}
331			}
332			}
333			#ifdef IPV6
334			else if (aclass->cidr_bitlen_ipv6 > 0)
335			{
336			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv6.head)
337			{
338			cidr = ptr->data;
339			if (match_ipv6(ip, &cidr->mask, aclass->cidr_bitlen_ipv6))
340			{
341			cidr->number_on_this_cidr--;
342			if (cidr->number_on_this_cidr == 0)
343			{
344			dlinkDelete(ptr, &aclass->list_ipv6);
345			MyFree(cidr);
346			return;
347			}
348			}
349			}
350			}
351			#endif
352			}
353
354			static void
355			rebuild_cidr_list(int aftype, struct ClassItem oldcl, struct ClassItem newcl,
356			dlink_list old_list, dlink_list new_list, int changed)
357			{
358			dlink_node *ptr;
359			struct Client *client_p;
360			struct MaskItem *conf;
361
362			if (!changed)
363			{
364			new_list = old_list;
365			old_list->head = old_list->tail = NULL;
366			old_list->length = 0;
367			return;
368			}
369
370			DLINK_FOREACH(ptr, local_client_list.head)
371			{
372			client_p = ptr->data;
373			if (client_p->localClient->aftype != aftype)
374			continue;
375			if (dlink_list_length(&client_p->localClient->confs) == 0)
376			continue;
377
378			conf = client_p->localClient->confs.tail->data;
379			if (conf->type == CONF_CLIENT)
380			if (conf->class == oldcl)
381			cidr_limit_reached(1, &client_p->localClient->ip, newcl);
382			}
383			}
384
385			/*
386			* rebuild_cidr_class
387			*
388			* inputs - pointer to old conf
389			* - pointer to new_class
390			* output - none
391			* side effects - rebuilds the class link list of cidr blocks
392			*/
393			void
394			rebuild_cidr_class(struct ClassItem old_class, struct ClassItem new_class)
395			{
396			if (old_class->number_per_cidr > 0 && new_class->number_per_cidr > 0)
397			{
398			if (old_class->cidr_bitlen_ipv4 > 0 && new_class->cidr_bitlen_ipv4 > 0)
399			rebuild_cidr_list(AF_INET, old_class, new_class,
400			&old_class->list_ipv4, &new_class->list_ipv4,
401			old_class->cidr_bitlen_ipv4 != new_class->cidr_bitlen_ipv4);
402
403			#ifdef IPV6
404			if (old_class->cidr_bitlen_ipv6 > 0 && new_class->cidr_bitlen_ipv6 > 0)
405			rebuild_cidr_list(AF_INET6, old_class, new_class,
406			&old_class->list_ipv6, &new_class->list_ipv6,
407			old_class->cidr_bitlen_ipv6 != new_class->cidr_bitlen_ipv6);
408			#endif
409			}
410
411			destroy_cidr_class(old_class);
412			}
413
414			/*
415			* destroy_cidr_list
416			*
417			* inputs - pointer to class dlink list of cidr blocks
418			* output - none
419			* side effects - completely destroys the class link list of cidr blocks
420			*/
421			static void
422			destroy_cidr_list(dlink_list *list)
423			{
424			dlink_node ptr = NULL, next_ptr = NULL;
425
426			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
427			{
428			dlinkDelete(ptr, list);
429			MyFree(ptr->data);
430			}
431			}
432
433			/*
434			* destroy_cidr_class
435			*
436			* inputs - pointer to class
437			* output - none
438			* side effects - completely destroys the class link list of cidr blocks
439			*/
440			void
441			destroy_cidr_class(struct ClassItem *class)
442			{
443			destroy_cidr_list(&class->list_ipv4);
444			destroy_cidr_list(&class->list_ipv6);
445			}