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 "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 && client_p->servptr);

  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(unsigned int *wwu, uint64_t *wwum)
{
  const struct Whowas *tmp;
  int i;
  unsigned int u = 0;
  uint64_t 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:	1243
Committed:	Fri Sep 30 10:47:53 2011 UTC (13 years, 11 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/src/whowas.c*
File size:	4809 byte(s)
Log Message:	- move content of msg.h, ircd_handler.h and handlers.h into parse.h and remove headers accordingly - killed common.h - remove m_killhost.c and m_flags.c from contrib/ - sort out unused header includes here and there
#	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 "hash.h"
29			#include "irc_string.h"
30			#include "ircd.h"
31			#include "ircd_defs.h"
32			#include "numeric.h"
33			#include "s_serv.h"
34			#include "s_user.h"
35			#include "send.h"
36			#include "s_conf.h"
37			#include "memory.h"
38
39			/* internally defined function */
40			static void add_whowas_to_clist(struct Whowas *, struct Whowas );
41			static void del_whowas_from_clist(struct Whowas *, struct Whowas );
42			static void add_whowas_to_list(struct Whowas *, struct Whowas );
43			static void del_whowas_from_list(struct Whowas *, struct Whowas );
44
45			struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
46			struct Whowas *WHOWASHASH[HASHSIZE];
47
48			static unsigned int whowas_next = 0;
49
50			void
51			add_history(struct Client *client_p, int online)
52			{
53			struct Whowas *who = &WHOWAS[whowas_next];
54
55	michael	507	assert(client_p && client_p->servptr);
56	adx	30
57			if (who->hashv != -1)
58			{
59			if (who->online)
60			del_whowas_from_clist(&(who->online->whowas),who);
61			del_whowas_from_list(&WHOWASHASH[who->hashv], who);
62			}
63
64	michael	507	who->hashv = strhash(client_p->name);
65	adx	30	who->logoff = CurrentTime;
66
67			/* NOTE: strcpy ok here, the sizes in the client struct MUST
68			* match the sizes in the whowas struct
69			*/
70			strlcpy(who->name, client_p->name, sizeof(who->name));
71			strcpy(who->username, client_p->username);
72			strcpy(who->hostname, client_p->host);
73			strcpy(who->realname, client_p->info);
74
75			strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));
76
77			if (online)
78			{
79			who->online = client_p;
80			add_whowas_to_clist(&(client_p->whowas), who);
81			}
82			else
83			who->online = NULL;
84
85			add_whowas_to_list(&WHOWASHASH[who->hashv], who);
86			whowas_next++;
87
88			if (whowas_next == NICKNAMEHISTORYLENGTH)
89			whowas_next = 0;
90			}
91
92			void
93			off_history(struct Client *client_p)
94			{
95			struct Whowas temp, next;
96
97			for (temp = client_p->whowas; temp; temp=next)
98			{
99			next = temp->cnext;
100			temp->online = NULL;
101			del_whowas_from_clist(&(client_p->whowas), temp);
102			}
103			}
104
105			struct Client *
106			get_history(const char *nick, time_t timelimit)
107			{
108			struct Whowas *temp;
109
110			timelimit = CurrentTime - timelimit;
111			temp = WHOWASHASH[strhash(nick)];
112
113			for (; temp; temp = temp->next)
114			{
115			if (irccmp(nick, temp->name))
116			continue;
117			if (temp->logoff < timelimit)
118			continue;
119			return(temp->online);
120			}
121
122			return(NULL);
123			}
124
125			void
126	michael	948	count_whowas_memory(unsigned int wwu, uint64_t wwum)
127	adx	30	{
128	michael	948	const struct Whowas *tmp;
129	adx	30	int i;
130	michael	948	unsigned int u = 0;
131			uint64_t um = 0;
132	adx	30
133			/* count the number of used whowas structs in 'u' */
134			/* count up the memory used of whowas structs in um */
135	michael	948	for (i = 0, tmp = &WHOWAS[0]; i < NICKNAMEHISTORYLENGTH; ++i, ++tmp)
136	adx	30	{
137			if (tmp->hashv != -1)
138			{
139	michael	948	++u;
140	adx	30	um += sizeof(struct Whowas);
141			}
142			}
143
144			*wwu = u;
145			*wwum = um;
146			}
147
148			void
149			init_whowas(void)
150			{
151			int i;
152
153			for (i = 0; i < NICKNAMEHISTORYLENGTH; i++)
154			{
155			memset(&WHOWAS[i], 0, sizeof(struct Whowas));
156			WHOWAS[i].hashv = -1;
157			}
158
159			for (i = 0; i < HASHSIZE; ++i)
160			WHOWASHASH[i] = NULL;
161			}
162
163			static void
164			add_whowas_to_clist(struct Whowas *bucket, struct Whowas whowas)
165			{
166			whowas->cprev = NULL;
167
168			if ((whowas->cnext = *bucket) != NULL)
169			whowas->cnext->cprev = whowas;
170			*bucket = whowas;
171			}
172
173			static void
174			del_whowas_from_clist(struct Whowas *bucket, struct Whowas whowas)
175			{
176			if (whowas->cprev)
177			whowas->cprev->cnext = whowas->cnext;
178			else
179			*bucket = whowas->cnext;
180			if (whowas->cnext)
181			whowas->cnext->cprev = whowas->cprev;
182			}
183
184			static void
185			add_whowas_to_list(struct Whowas *bucket, struct Whowas whowas)
186			{
187			whowas->prev = NULL;
188
189			if ((whowas->next = *bucket) != NULL)
190			whowas->next->prev = whowas;
191			*bucket = whowas;
192			}
193
194			static void
195			del_whowas_from_list(struct Whowas *bucket, struct Whowas whowas)
196			{
197			if (whowas->prev)
198			whowas->prev->next = whowas->next;
199			else
200			*bucket = whowas->next;
201			if (whowas->next)
202			whowas->next->prev = whowas->prev;
203			}