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.h"
#include "conf.h"
#include "hostmask.h"
#include "irc_string.h"
#include "memory.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));

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

  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())->name = xstrdup("default");
}

struct ClassItem *
get_class_ptr(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_OPER | CONF_CLIENT | CONF_SERVER));

    return conf->class;
  }

  return class_default;
}

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_OPER | 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(conf->class);
    assert(conf->type & (CONF_OPER | 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_OPER | 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_OPER | 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_PREV(ptr, class_list.tail->prev)
    ((struct ClassItem *)ptr->data)->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
}

void
rebuild_cidr_list(struct ClassItem *class)
{
  dlink_node *ptr;

  destroy_cidr_class(class);

  DLINK_FOREACH(ptr, local_client_list.head)
  {
    struct Client *client_p = ptr->data;
    struct MaskItem *conf = client_p->localClient->confs.tail->data;

    if (conf && (conf->type == CONF_CLIENT))
      if (conf->class == class)
        cidr_limit_reached(1, &client_p->localClient->ip, 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:	1783
Committed:	Thu Jan 24 19:26:51 2013 UTC (13 years, 8 months ago) by michael
Content type:	text/x-csrc
File size:	8530 byte(s)
Log Message:	- Forward-port -r1774: - Configuration parser now does support 'year' and 'month' units - Add support for fake idle times to /whois. Known from csircd, this adds min_idle, and max_idle configuration directives to class{} blocks
#	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	michael	1658	#include "ircd.h"
30	michael	1633	#include "conf.h"
31	michael	1658	#include "hostmask.h"
32	michael	1633	#include "irc_string.h"
33			#include "memory.h"
34
35
36			struct ClassItem *class_default;
37
38			static dlink_list class_list = { NULL, NULL, 0 };
39
40
41			const dlink_list *
42			class_get_list(void)
43			{
44			return &class_list;
45			}
46
47			struct ClassItem *
48			class_make(void)
49			{
50			struct ClassItem class = MyMalloc(sizeof(class));
51
52	michael	1650	class->active = 1;
53			class->con_freq = DEFAULT_CONNECTFREQUENCY;
54			class->ping_freq = DEFAULT_PINGFREQUENCY;
55			class->max_total = MAXIMUM_LINKS_DEFAULT;
56			class->max_sendq = DEFAULT_SENDQ;
57			class->max_recvq = DEFAULT_RECVQ;
58
59	michael	1633	dlinkAdd(class, &class->node, &class_list);
60
61			return class;
62			}
63
64			void
65			class_free(struct ClassItem *class)
66			{
67			assert(class);
68			assert(class->active == 0);
69			assert(class->ref_count == 0);
70
71			dlinkDelete(&class->node, &class_list);
72			MyFree(class->name);
73			MyFree(class);
74			}
75
76			void
77			class_init(void)
78			{
79	michael	1650	(class_default = class_make())->name = xstrdup("default");
80	michael	1633	}
81
82	michael	1783	struct ClassItem *
83			get_class_ptr(const dlink_list *const list)
84			{
85			const dlink_node *ptr = NULL;
86
87			if ((ptr = list->head)) {
88			const struct MaskItem *conf = ptr->data;
89
90			assert(conf->class);
91			assert(conf->type & (CONF_OPER \| CONF_CLIENT \| CONF_SERVER));
92
93			return conf->class;
94			}
95
96			return class_default;
97			}
98
99	michael	1633	const char *
100			get_client_class(const dlink_list *const list)
101			{
102			const dlink_node *ptr = NULL;
103
104			if ((ptr = list->head)) {
105			const struct MaskItem *conf = ptr->data;
106
107			assert(conf->class);
108	michael	1654	assert(conf->type & (CONF_OPER \| CONF_CLIENT \| CONF_SERVER));
109	michael	1633
110			return conf->class->name;
111			}
112
113			return class_default->name;
114			}
115
116			unsigned int
117	michael	1644	get_client_ping(const dlink_list *const list)
118	michael	1633	{
119			const dlink_node *ptr = NULL;
120
121			if ((ptr = list->head)) {
122			const struct MaskItem *conf = ptr->data;
123
124	michael	1654	assert(conf->class);
125			assert(conf->type & (CONF_OPER \| CONF_CLIENT \| CONF_SERVER));
126	michael	1633
127	michael	1644	return conf->class->ping_freq;
128	michael	1633	}
129
130			return class_default->ping_freq;
131			}
132
133			unsigned int
134			get_sendq(const dlink_list *const list)
135			{
136			const dlink_node *ptr = NULL;
137
138			if ((ptr = list->head)) {
139			const struct MaskItem *conf = ptr->data;
140
141			assert(conf->class);
142	michael	1654	assert(conf->type & (CONF_OPER \| CONF_CLIENT \| CONF_SERVER));
143	michael	1633
144			return conf->class->max_sendq;
145			}
146
147			return class_default->max_sendq;
148			}
149
150			unsigned int
151			get_recvq(const dlink_list *const list)
152			{
153			const dlink_node *ptr = NULL;
154
155			if ((ptr = list->head)) {
156			const struct MaskItem *conf = ptr->data;
157
158			assert(conf->class);
159	michael	1654	assert(conf->type & (CONF_OPER \| CONF_CLIENT \| CONF_SERVER));
160	michael	1633
161			return conf->class->max_recvq;
162			}
163
164			return class_default->max_recvq;
165			}
166
167			/*
168			* inputs - Integer (Number of class)
169			* output - Pointer to ClassItem struct. Non-NULL expected
170			* side effects - NONE
171			*/
172			struct ClassItem *
173			class_find(const char *name, int active)
174			{
175			dlink_node *ptr = NULL;
176
177			DLINK_FOREACH(ptr, class_list.head) {
178			struct ClassItem *class = ptr->data;
179
180			if (!irccmp(class->name, name))
181			return active && !class->active ? NULL : class;
182			}
183
184			return NULL;
185			}
186
187			/*
188			* We don't delete the class table, rather mark all entries for deletion.
189			* The table is cleaned up by delete_marked_classes. - avalon
190			*/
191			void
192			class_mark_for_deletion(void)
193			{
194			dlink_node *ptr = NULL;
195
196	michael	1650	DLINK_FOREACH_PREV(ptr, class_list.tail->prev)
197			((struct ClassItem *)ptr->data)->active = 0;
198	michael	1633	}
199
200			void
201			class_delete_marked(void)
202			{
203			dlink_node ptr = NULL, ptr_next = NULL;
204
205			DLINK_FOREACH_SAFE(ptr, ptr_next, class_list.head) {
206			struct ClassItem *class = ptr->data;
207
208			if (!class->active && !class->ref_count)
209			{
210			destroy_cidr_class(class);
211			class_free(class);
212			}
213			}
214			}
215
216			/*
217			* cidr_limit_reached
218			*
219			* inputs - int flag allowing over_rule of limits
220			* - pointer to the ip to be added
221			* - pointer to the class
222			* output - non zero if limit reached
223			* 0 if limit not reached
224			* side effects -
225			*/
226			int
227			cidr_limit_reached(int over_rule,
228			struct irc_ssaddr ip, struct ClassItem class)
229			{
230			dlink_node *ptr = NULL;
231			struct CidrItem *cidr = NULL;
232
233	michael	1644	if (class->number_per_cidr == 0)
234	michael	1633	return 0;
235
236			if (ip->ss.ss_family == AF_INET)
237			{
238	michael	1644	if (class->cidr_bitlen_ipv4 == 0)
239	michael	1633	return 0;
240
241			DLINK_FOREACH(ptr, class->list_ipv4.head)
242			{
243			cidr = ptr->data;
244			if (match_ipv4(ip, &cidr->mask, class->cidr_bitlen_ipv4))
245			{
246			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
247			return -1;
248			cidr->number_on_this_cidr++;
249			return 0;
250			}
251			}
252			cidr = MyMalloc(sizeof(struct CidrItem));
253			cidr->number_on_this_cidr = 1;
254			cidr->mask = *ip;
255			mask_addr(&cidr->mask, class->cidr_bitlen_ipv4);
256			dlinkAdd(cidr, &cidr->node, &class->list_ipv4);
257			}
258			#ifdef IPV6
259			else if (class->cidr_bitlen_ipv6 > 0)
260			{
261			DLINK_FOREACH(ptr, class->list_ipv6.head)
262			{
263			cidr = ptr->data;
264			if (match_ipv6(ip, &cidr->mask, class->cidr_bitlen_ipv6))
265			{
266			if (!over_rule && (cidr->number_on_this_cidr >= class->number_per_cidr))
267			return -1;
268			cidr->number_on_this_cidr++;
269			return 0;
270			}
271			}
272			cidr = MyMalloc(sizeof(struct CidrItem));
273			cidr->number_on_this_cidr = 1;
274			cidr->mask = *ip;
275			mask_addr(&cidr->mask, class->cidr_bitlen_ipv6);
276			dlinkAdd(cidr, &cidr->node, &class->list_ipv6);
277			}
278			#endif
279			return 0;
280			}
281
282			/*
283			* remove_from_cidr_check
284			*
285			* inputs - pointer to the ip to be removed
286			* - pointer to the class
287			* output - NONE
288			* side effects -
289			*/
290			void
291			remove_from_cidr_check(struct irc_ssaddr ip, struct ClassItem aclass)
292			{
293			dlink_node *ptr = NULL;
294			dlink_node *next_ptr = NULL;
295			struct CidrItem *cidr;
296
297			if (aclass->number_per_cidr == 0)
298			return;
299
300			if (ip->ss.ss_family == AF_INET)
301			{
302	michael	1644	if (aclass->cidr_bitlen_ipv4 == 0)
303	michael	1633	return;
304
305			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv4.head)
306			{
307			cidr = ptr->data;
308			if (match_ipv4(ip, &cidr->mask, aclass->cidr_bitlen_ipv4))
309			{
310			cidr->number_on_this_cidr--;
311			if (cidr->number_on_this_cidr == 0)
312			{
313			dlinkDelete(ptr, &aclass->list_ipv4);
314			MyFree(cidr);
315			return;
316			}
317			}
318			}
319			}
320			#ifdef IPV6
321			else if (aclass->cidr_bitlen_ipv6 > 0)
322			{
323			DLINK_FOREACH_SAFE(ptr, next_ptr, aclass->list_ipv6.head)
324			{
325			cidr = ptr->data;
326			if (match_ipv6(ip, &cidr->mask, aclass->cidr_bitlen_ipv6))
327			{
328			cidr->number_on_this_cidr--;
329			if (cidr->number_on_this_cidr == 0)
330			{
331			dlinkDelete(ptr, &aclass->list_ipv6);
332			MyFree(cidr);
333			return;
334			}
335			}
336			}
337			}
338			#endif
339			}
340
341	michael	1647	void
342			rebuild_cidr_list(struct ClassItem *class)
343	michael	1633	{
344			dlink_node *ptr;
345
346	michael	1647	destroy_cidr_class(class);
347	michael	1633
348			DLINK_FOREACH(ptr, local_client_list.head)
349			{
350	michael	1647	struct Client *client_p = ptr->data;
351			struct MaskItem *conf = client_p->localClient->confs.tail->data;
352	michael	1633
353	michael	1647	if (conf && (conf->type == CONF_CLIENT))
354			if (conf->class == class)
355			cidr_limit_reached(1, &client_p->localClient->ip, class);
356	michael	1633	}
357			}
358
359			/*
360			* destroy_cidr_list
361			*
362			* inputs - pointer to class dlink list of cidr blocks
363			* output - none
364			* side effects - completely destroys the class link list of cidr blocks
365			*/
366			static void
367			destroy_cidr_list(dlink_list *list)
368			{
369			dlink_node ptr = NULL, next_ptr = NULL;
370
371			DLINK_FOREACH_SAFE(ptr, next_ptr, list->head)
372			{
373			dlinkDelete(ptr, list);
374			MyFree(ptr->data);
375			}
376			}
377
378			/*
379			* destroy_cidr_class
380			*
381			* inputs - pointer to class
382			* output - none
383			* side effects - completely destroys the class link list of cidr blocks
384			*/
385			void
386			destroy_cidr_class(struct ClassItem *class)
387			{
388			destroy_cidr_list(&class->list_ipv4);
389			destroy_cidr_list(&class->list_ipv6);
390			}