trunk/src/whowas.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  whowas.c: WHOWAS user cache.
 *
 *  Copyright (C) 2005 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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "whowas.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"


static struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
dlink_list WHOWASHASH[HASHSIZE];


void
whowas_init(void)
{
  unsigned int idx;

  for (idx = 0; idx < NICKNAMEHISTORYLENGTH; ++idx)
    WHOWAS[idx].hashv = -1;
}

void
whowas_add_history(struct Client *client_p, const int online)
{
  static unsigned int whowas_next = 0;
  struct Whowas *who = &WHOWAS[whowas_next];

  assert(client_p && client_p->servptr);

  if (++whowas_next == NICKNAMEHISTORYLENGTH)
    whowas_next = 0;

  if (who->hashv != -1)
  {
    if (who->online)
      dlinkDelete(&who->cnode, &who->online->whowas);

    dlinkDelete(&who->tnode, &WHOWASHASH[who->hashv]);
  }

  who->hashv = strhash(client_p->name);
  who->shide = IsHidden(client_p->servptr) != 0;
  who->logoff = CurrentTime;

  strlcpy(who->name, client_p->name, sizeof(who->name));
  strlcpy(who->username, client_p->username, sizeof(who->username));
  strlcpy(who->hostname, client_p->host, sizeof(who->hostname));
  strlcpy(who->realname, client_p->info, sizeof(who->realname));
  strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));

  if (online)
  {
    who->online = client_p;
    dlinkAdd(who, &who->cnode, &client_p->whowas);
  }
  else
    who->online = NULL;

  dlinkAdd(who, &who->tnode, &WHOWASHASH[who->hashv]);
}

void
whowas_off_history(struct Client *client_p)
{
  dlink_node *ptr = NULL, *ptr_next = NULL;

  DLINK_FOREACH_SAFE(ptr, ptr_next, client_p->whowas.head)
  {
    struct Whowas *temp = ptr->data;

    temp->online = NULL;
    dlinkDelete(&temp->cnode, &client_p->whowas);
  }
}

struct Client *
whowas_get_history(const char *nick, time_t timelimit)
{
  dlink_node *ptr = NULL;

  timelimit = CurrentTime - timelimit;

  DLINK_FOREACH(ptr, WHOWASHASH[strhash(nick)].head)
  {
    struct Whowas *temp = ptr->data;

    if (temp->logoff < timelimit)
      continue;
    if (irccmp(nick, temp->name))
      continue;
    return temp->online;
  }

  return NULL;
}

void
whowas_count_memory(unsigned int *const count, uint64_t *const bytes)
{
  const struct Whowas *tmp = &WHOWAS[0];
  unsigned int i = 0;

  for (; i < NICKNAMEHISTORYLENGTH; ++i, ++tmp)
  {
    if (tmp->hashv != -1)
    {
      (*count)++;
      (*bytes) += sizeof(struct Whowas);
    }
  }
}
Revision:	2748
Committed:	Sun Jan 5 19:20:09 2014 UTC (11 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	3308 byte(s)
Log Message:	- Fixed server name leak for hidden servers in /who, /whois and /whowas
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* whowas.c: WHOWAS user cache.
4			*
5			* Copyright (C) 2005 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26	michael	1358	#include "list.h"
27	adx	30	#include "whowas.h"
28			#include "client.h"
29			#include "hash.h"
30			#include "irc_string.h"
31			#include "ircd.h"
32
33
34	michael	1358	static struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
35			dlink_list WHOWASHASH[HASHSIZE];
36	adx	30
37
38			void
39	michael	1997	whowas_init(void)
40			{
41			unsigned int idx;
42
43			for (idx = 0; idx < NICKNAMEHISTORYLENGTH; ++idx)
44			WHOWAS[idx].hashv = -1;
45			}
46
47			void
48	michael	2300	whowas_add_history(struct Client *client_p, const int online)
49	adx	30	{
50	michael	1358	static unsigned int whowas_next = 0;
51	adx	30	struct Whowas *who = &WHOWAS[whowas_next];
52
53	michael	507	assert(client_p && client_p->servptr);
54	adx	30
55	michael	1358	if (++whowas_next == NICKNAMEHISTORYLENGTH)
56			whowas_next = 0;
57
58	adx	30	if (who->hashv != -1)
59			{
60			if (who->online)
61	michael	1358	dlinkDelete(&who->cnode, &who->online->whowas);
62
63			dlinkDelete(&who->tnode, &WHOWASHASH[who->hashv]);
64	adx	30	}
65
66	michael	507	who->hashv = strhash(client_p->name);
67	michael	2748	who->shide = IsHidden(client_p->servptr) != 0;
68	adx	30	who->logoff = CurrentTime;
69
70			strlcpy(who->name, client_p->name, sizeof(who->name));
71	michael	1358	strlcpy(who->username, client_p->username, sizeof(who->username));
72			strlcpy(who->hostname, client_p->host, sizeof(who->hostname));
73			strlcpy(who->realname, client_p->info, sizeof(who->realname));
74	adx	30	strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));
75
76			if (online)
77			{
78			who->online = client_p;
79	michael	1358	dlinkAdd(who, &who->cnode, &client_p->whowas);
80	adx	30	}
81			else
82			who->online = NULL;
83
84	michael	1358	dlinkAdd(who, &who->tnode, &WHOWASHASH[who->hashv]);
85	adx	30	}
86
87			void
88	michael	2300	whowas_off_history(struct Client *client_p)
89	adx	30	{
90	michael	1358	dlink_node ptr = NULL, ptr_next = NULL;
91	adx	30
92	michael	1358	DLINK_FOREACH_SAFE(ptr, ptr_next, client_p->whowas.head)
93	adx	30	{
94	michael	1358	struct Whowas *temp = ptr->data;
95
96	adx	30	temp->online = NULL;
97	michael	1358	dlinkDelete(&temp->cnode, &client_p->whowas);
98	adx	30	}
99			}
100
101			struct Client *
102	michael	2300	whowas_get_history(const char *nick, time_t timelimit)
103	adx	30	{
104	michael	1358	dlink_node *ptr = NULL;
105	adx	30
106			timelimit = CurrentTime - timelimit;
107
108	michael	1358	DLINK_FOREACH(ptr, WHOWASHASH[strhash(nick)].head)
109	adx	30	{
110	michael	1358	struct Whowas *temp = ptr->data;
111
112			if (temp->logoff < timelimit)
113			continue;
114	adx	30	if (irccmp(nick, temp->name))
115			continue;
116	michael	1298	return temp->online;
117	adx	30	}
118
119	michael	1298	return NULL;
120	adx	30	}
121
122			void
123	michael	2297	whowas_count_memory(unsigned int const count, uint64_t const bytes)
124	adx	30	{
125	michael	2297	const struct Whowas *tmp = &WHOWAS[0];
126			unsigned int i = 0;
127	adx	30
128	michael	2297	for (; i < NICKNAMEHISTORYLENGTH; ++i, ++tmp)
129	adx	30	{
130			if (tmp->hashv != -1)
131			{
132	michael	2297	(*count)++;
133			(*bytes) += sizeof(struct Whowas);
134	adx	30	}
135			}
136			}