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 "whowas.h"
#include "client.h"
#include "common.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "ircd_defs.h"
#include "numeric.h"
#include "s_serv.h"
#include "s_user.h"
#include "send.h"
#include "s_conf.h"
#include "memory.h"

/* internally defined function */
static void add_whowas_to_clist(struct Whowas **, struct Whowas *);
static void del_whowas_from_clist(struct Whowas **, struct Whowas *);
static void add_whowas_to_list(struct Whowas **, struct Whowas *);
static void del_whowas_from_list(struct Whowas **, struct Whowas *);

struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
struct Whowas *WHOWASHASH[HASHSIZE];

static unsigned int whowas_next = 0;

void
add_history(struct Client *client_p, int online)
{
  struct Whowas *who = &WHOWAS[whowas_next];

  assert(client_p != NULL);

  if (client_p == NULL)
    return;

  /* XXX when is this possible? Looks like it could happen
   * (with a half registered client.)
   * and what is the correct action here? - Dianora
   */
  if (client_p->servptr == NULL)
    return;

  if (who->hashv != -1)
  {
    if (who->online)
      del_whowas_from_clist(&(who->online->whowas),who);
    del_whowas_from_list(&WHOWASHASH[who->hashv], who);
  }

  who->hashv  = strhash(client_p->name);
  who->logoff = CurrentTime;

  /* NOTE: strcpy ok here, the sizes in the client struct MUST
   * match the sizes in the whowas struct
   */
  strlcpy(who->name, client_p->name, sizeof(who->name));
  strcpy(who->username, client_p->username);
  strcpy(who->hostname, client_p->host);
  strcpy(who->realname, client_p->info);

  strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));

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

  add_whowas_to_list(&WHOWASHASH[who->hashv], who);
  whowas_next++;

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

void
off_history(struct Client *client_p)
{
  struct Whowas *temp, *next;

  for (temp = client_p->whowas; temp; temp=next)
  {
    next = temp->cnext;
    temp->online = NULL;
    del_whowas_from_clist(&(client_p->whowas), temp);
  }
}

struct Client *
get_history(const char *nick, time_t timelimit)
{
  struct Whowas *temp;

  timelimit = CurrentTime - timelimit;
  temp = WHOWASHASH[strhash(nick)];

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

  return(NULL);
}

void
count_whowas_memory(int *wwu, unsigned long *wwum)
{
  struct Whowas *tmp;
  int i;
  int u = 0;
  unsigned long um = 0;

  /* count the number of used whowas structs in 'u'   */
  /* count up the memory used of whowas structs in um */
  for (i = 0, tmp = &WHOWAS[0]; i < NICKNAMEHISTORYLENGTH; i++, tmp++)
  {
    if (tmp->hashv != -1)
    {
      u++;
      um += sizeof(struct Whowas);
    }
  }

  *wwu = u;
  *wwum = um;
}

void
init_whowas(void)
{
  int i;

  for (i = 0; i < NICKNAMEHISTORYLENGTH; i++)
  {
    memset(&WHOWAS[i], 0, sizeof(struct Whowas));
    WHOWAS[i].hashv = -1;
  }

  for (i = 0; i < HASHSIZE; ++i)
    WHOWASHASH[i] = NULL;        
}

static void
add_whowas_to_clist(struct Whowas **bucket, struct Whowas *whowas)
{
  whowas->cprev = NULL;

  if ((whowas->cnext = *bucket) != NULL)
    whowas->cnext->cprev = whowas;
  *bucket = whowas;
}
 
static void
del_whowas_from_clist(struct Whowas **bucket, struct Whowas *whowas)
{
  if (whowas->cprev)
    whowas->cprev->cnext = whowas->cnext;
  else
    *bucket = whowas->cnext;
  if (whowas->cnext)
    whowas->cnext->cprev = whowas->cprev;
}

static void
add_whowas_to_list(struct Whowas **bucket, struct Whowas *whowas)
{
  whowas->prev = NULL;

  if ((whowas->next = *bucket) != NULL)
    whowas->next->prev = whowas;
  *bucket = whowas;
}
 
static void
del_whowas_from_list(struct Whowas **bucket, struct Whowas *whowas)
{
  if (whowas->prev)
    whowas->prev->next = whowas->next;
  else
    *bucket = whowas->next;
  if (whowas->next)
    whowas->next->prev = whowas->prev;
}
Revision:	34
Committed:	Sun Oct 2 21:05:51 2005 UTC (19 years, 10 months ago) by lusky
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/src/whowas.c*
File size:	5041 byte(s)
Log Message:	create 7.2 branch, we can move/rename it as needed.
#	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			#include "whowas.h"
27			#include "client.h"
28			#include "common.h"
29			#include "hash.h"
30			#include "irc_string.h"
31			#include "ircd.h"
32			#include "ircd_defs.h"
33			#include "numeric.h"
34			#include "s_serv.h"
35			#include "s_user.h"
36			#include "send.h"
37			#include "s_conf.h"
38			#include "memory.h"
39
40			/* internally defined function */
41			static void add_whowas_to_clist(struct Whowas *, struct Whowas );
42			static void del_whowas_from_clist(struct Whowas *, struct Whowas );
43			static void add_whowas_to_list(struct Whowas *, struct Whowas );
44			static void del_whowas_from_list(struct Whowas *, struct Whowas );
45
46			struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
47			struct Whowas *WHOWASHASH[HASHSIZE];
48
49			static unsigned int whowas_next = 0;
50
51			void
52			add_history(struct Client *client_p, int online)
53			{
54			struct Whowas *who = &WHOWAS[whowas_next];
55
56			assert(client_p != NULL);
57
58			if (client_p == NULL)
59			return;
60
61			/* XXX when is this possible? Looks like it could happen
62			* (with a half registered client.)
63			* and what is the correct action here? - Dianora
64			*/
65			if (client_p->servptr == NULL)
66			return;
67
68			if (who->hashv != -1)
69			{
70			if (who->online)
71			del_whowas_from_clist(&(who->online->whowas),who);
72			del_whowas_from_list(&WHOWASHASH[who->hashv], who);
73			}
74
75			who->hashv = strhash(client_p->name);
76			who->logoff = CurrentTime;
77
78			/* NOTE: strcpy ok here, the sizes in the client struct MUST
79			* match the sizes in the whowas struct
80			*/
81			strlcpy(who->name, client_p->name, sizeof(who->name));
82			strcpy(who->username, client_p->username);
83			strcpy(who->hostname, client_p->host);
84			strcpy(who->realname, client_p->info);
85
86			strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));
87
88			if (online)
89			{
90			who->online = client_p;
91			add_whowas_to_clist(&(client_p->whowas), who);
92			}
93			else
94			who->online = NULL;
95
96			add_whowas_to_list(&WHOWASHASH[who->hashv], who);
97			whowas_next++;
98
99			if (whowas_next == NICKNAMEHISTORYLENGTH)
100			whowas_next = 0;
101			}
102
103			void
104			off_history(struct Client *client_p)
105			{
106			struct Whowas temp, next;
107
108			for (temp = client_p->whowas; temp; temp=next)
109			{
110			next = temp->cnext;
111			temp->online = NULL;
112			del_whowas_from_clist(&(client_p->whowas), temp);
113			}
114			}
115
116			struct Client *
117			get_history(const char *nick, time_t timelimit)
118			{
119			struct Whowas *temp;
120
121			timelimit = CurrentTime - timelimit;
122			temp = WHOWASHASH[strhash(nick)];
123
124			for (; temp; temp = temp->next)
125			{
126			if (irccmp(nick, temp->name))
127			continue;
128			if (temp->logoff < timelimit)
129			continue;
130			return(temp->online);
131			}
132
133			return(NULL);
134			}
135
136			void
137			count_whowas_memory(int wwu, unsigned long wwum)
138			{
139			struct Whowas *tmp;
140			int i;
141			int u = 0;
142			unsigned long um = 0;
143
144			/* count the number of used whowas structs in 'u' */
145			/* count up the memory used of whowas structs in um */
146			for (i = 0, tmp = &WHOWAS[0]; i < NICKNAMEHISTORYLENGTH; i++, tmp++)
147			{
148			if (tmp->hashv != -1)
149			{
150			u++;
151			um += sizeof(struct Whowas);
152			}
153			}
154
155			*wwu = u;
156			*wwum = um;
157			}
158
159			void
160			init_whowas(void)
161			{
162			int i;
163
164			for (i = 0; i < NICKNAMEHISTORYLENGTH; i++)
165			{
166			memset(&WHOWAS[i], 0, sizeof(struct Whowas));
167			WHOWAS[i].hashv = -1;
168			}
169
170			for (i = 0; i < HASHSIZE; ++i)
171			WHOWASHASH[i] = NULL;
172			}
173
174			static void
175			add_whowas_to_clist(struct Whowas *bucket, struct Whowas whowas)
176			{
177			whowas->cprev = NULL;
178
179			if ((whowas->cnext = *bucket) != NULL)
180			whowas->cnext->cprev = whowas;
181			*bucket = whowas;
182			}
183
184			static void
185			del_whowas_from_clist(struct Whowas *bucket, struct Whowas whowas)
186			{
187			if (whowas->cprev)
188			whowas->cprev->cnext = whowas->cnext;
189			else
190			*bucket = whowas->cnext;
191			if (whowas->cnext)
192			whowas->cnext->cprev = whowas->cprev;
193			}
194
195			static void
196			add_whowas_to_list(struct Whowas *bucket, struct Whowas whowas)
197			{
198			whowas->prev = NULL;
199
200			if ((whowas->next = *bucket) != NULL)
201			whowas->next->prev = whowas;
202			*bucket = whowas;
203			}
204
205			static void
206			del_whowas_from_list(struct Whowas *bucket, struct Whowas whowas)
207			{
208			if (whowas->prev)
209			whowas->prev->next = whowas->next;
210			else
211			*bucket = whowas->next;
212			if (whowas->next)
213			whowas->next->prev = whowas->prev;
214			}