ircd-hybrid/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 "ircd.h"
#include "ircd_defs.h"
#include "numeric.h"
#include "s_serv.h"
#include "s_user.h"
#include "send.h"
#include "s_conf.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:	69
Committed:	Tue Oct 4 16:09:51 2005 UTC (20 years, 10 months ago) by adx
Content type:	text/x-csrc
File size:	4997 byte(s)
Log Message:	- splitted ircd/libio, all headers connected with libio sources have been moved for internal use only. To use libio interface, include "libio.h" (which is already done in "stdinc.h")
#	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 "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
38			/* internally defined function */
39			static void add_whowas_to_clist(struct Whowas *, struct Whowas );
40			static void del_whowas_from_clist(struct Whowas *, struct Whowas );
41			static void add_whowas_to_list(struct Whowas *, struct Whowas );
42			static void del_whowas_from_list(struct Whowas *, struct Whowas );
43
44			struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH];
45			struct Whowas *WHOWASHASH[HASHSIZE];
46
47			static unsigned int whowas_next = 0;
48
49			void
50			add_history(struct Client *client_p, int online)
51			{
52			struct Whowas *who = &WHOWAS[whowas_next];
53
54			assert(client_p != NULL);
55
56			if (client_p == NULL)
57			return;
58
59			/* XXX when is this possible? Looks like it could happen
60			* (with a half registered client.)
61			* and what is the correct action here? - Dianora
62			*/
63			if (client_p->servptr == NULL)
64			return;
65
66			if (who->hashv != -1)
67			{
68			if (who->online)
69			del_whowas_from_clist(&(who->online->whowas),who);
70			del_whowas_from_list(&WHOWASHASH[who->hashv], who);
71			}
72
73			who->hashv = strhash(client_p->name);
74			who->logoff = CurrentTime;
75
76			/* NOTE: strcpy ok here, the sizes in the client struct MUST
77			* match the sizes in the whowas struct
78			*/
79			strlcpy(who->name, client_p->name, sizeof(who->name));
80			strcpy(who->username, client_p->username);
81			strcpy(who->hostname, client_p->host);
82			strcpy(who->realname, client_p->info);
83
84			strlcpy(who->servername, client_p->servptr->name, sizeof(who->servername));
85
86			if (online)
87			{
88			who->online = client_p;
89			add_whowas_to_clist(&(client_p->whowas), who);
90			}
91			else
92			who->online = NULL;
93
94			add_whowas_to_list(&WHOWASHASH[who->hashv], who);
95			whowas_next++;
96
97			if (whowas_next == NICKNAMEHISTORYLENGTH)
98			whowas_next = 0;
99			}
100
101			void
102			off_history(struct Client *client_p)
103			{
104			struct Whowas temp, next;
105
106			for (temp = client_p->whowas; temp; temp=next)
107			{
108			next = temp->cnext;
109			temp->online = NULL;
110			del_whowas_from_clist(&(client_p->whowas), temp);
111			}
112			}
113
114			struct Client *
115			get_history(const char *nick, time_t timelimit)
116			{
117			struct Whowas *temp;
118
119			timelimit = CurrentTime - timelimit;
120			temp = WHOWASHASH[strhash(nick)];
121
122			for (; temp; temp = temp->next)
123			{
124			if (irccmp(nick, temp->name))
125			continue;
126			if (temp->logoff < timelimit)
127			continue;
128			return(temp->online);
129			}
130
131			return(NULL);
132			}
133
134			void
135			count_whowas_memory(int wwu, unsigned long wwum)
136			{
137			struct Whowas *tmp;
138			int i;
139			int u = 0;
140			unsigned long um = 0;
141
142			/* count the number of used whowas structs in 'u' */
143			/* count up the memory used of whowas structs in um */
144			for (i = 0, tmp = &WHOWAS[0]; i < NICKNAMEHISTORYLENGTH; i++, tmp++)
145			{
146			if (tmp->hashv != -1)
147			{
148			u++;
149			um += sizeof(struct Whowas);
150			}
151			}
152
153			*wwu = u;
154			*wwum = um;
155			}
156
157			void
158			init_whowas(void)
159			{
160			int i;
161
162			for (i = 0; i < NICKNAMEHISTORYLENGTH; i++)
163			{
164			memset(&WHOWAS[i], 0, sizeof(struct Whowas));
165			WHOWAS[i].hashv = -1;
166			}
167
168			for (i = 0; i < HASHSIZE; ++i)
169			WHOWASHASH[i] = NULL;
170			}
171
172			static void
173			add_whowas_to_clist(struct Whowas *bucket, struct Whowas whowas)
174			{
175			whowas->cprev = NULL;
176
177			if ((whowas->cnext = *bucket) != NULL)
178			whowas->cnext->cprev = whowas;
179			*bucket = whowas;
180			}
181
182			static void
183			del_whowas_from_clist(struct Whowas *bucket, struct Whowas whowas)
184			{
185			if (whowas->cprev)
186			whowas->cprev->cnext = whowas->cnext;
187			else
188			*bucket = whowas->cnext;
189			if (whowas->cnext)
190			whowas->cnext->cprev = whowas->cprev;
191			}
192
193			static void
194			add_whowas_to_list(struct Whowas *bucket, struct Whowas whowas)
195			{
196			whowas->prev = NULL;
197
198			if ((whowas->next = *bucket) != NULL)
199			whowas->next->prev = whowas;
200			*bucket = whowas;
201			}
202
203			static void
204			del_whowas_from_list(struct Whowas *bucket, struct Whowas whowas)
205			{
206			if (whowas->prev)
207			whowas->prev->next = whowas->next;
208			else
209			*bucket = whowas->next;
210			if (whowas->next)
211			whowas->next->prev = whowas->prev;
212			}