]>
jfr.im git - irc/rqf/shadowircd.git/blob - src/scache.c
2 * ircd-ratbox: A slightly useful ircd.
3 * scache.c: Server names cache.
5 * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
6 * Copyright (C) 1996-2002 Hybrid Development Team
7 * Copyright (C) 2002-2005 ircd-ratbox development team
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
38 * ircd used to store full servernames in anUser as well as in the
39 * whowas info. there can be some 40k such structures alive at any
40 * given time, while the number of unique server names a server sees
41 * in its lifetime is at most a few hundred. by tokenizing server
42 * names internally, the server can easily save 2 or 3 megs of RAM.
45 * reworked to serve for flattening/delaying /links also
50 #define SCACHE_HASH_SIZE 257
57 char name
[HOSTLEN
+ 1];
58 char info
[REALLEN
+ 1];
63 struct scache_entry
*next
;
66 static struct scache_entry
*scache_hash
[SCACHE_HASH_SIZE
];
69 clear_scache_hash_table(void)
71 memset(scache_hash
, 0, sizeof(scache_hash
));
75 sc_hash(const char *string
)
82 hash_value
+= ToLower(*string
++);
85 return hash_value
% SCACHE_HASH_SIZE
;
88 static struct scache_entry
*
89 find_or_add(const char *name
)
92 struct scache_entry
*ptr
;
94 ptr
= scache_hash
[hash_index
= sc_hash(name
)];
95 for (; ptr
; ptr
= ptr
->next
)
97 if(!irccmp(ptr
->name
, name
))
101 ptr
= (struct scache_entry
*) rb_malloc(sizeof(struct scache_entry
));
104 rb_strlcpy(ptr
->name
, name
, sizeof(ptr
->name
));
107 ptr
->known_since
= rb_current_time();
108 ptr
->last_connect
= 0;
111 ptr
->next
= scache_hash
[hash_index
];
112 scache_hash
[hash_index
] = ptr
;
116 struct scache_entry
*
117 scache_connect(const char *name
, const char *info
, int hidden
)
119 struct scache_entry
*ptr
;
121 ptr
= find_or_add(name
);
122 rb_strlcpy(ptr
->info
, info
, sizeof(ptr
->info
));
123 ptr
->flags
|= SC_ONLINE
;
125 ptr
->flags
|= SC_HIDDEN
;
127 ptr
->flags
&= ~SC_HIDDEN
;
128 ptr
->last_connect
= rb_current_time();
133 scache_split(struct scache_entry
*ptr
)
137 ptr
->flags
&= ~SC_ONLINE
;
138 ptr
->last_split
= rb_current_time();
141 const char *scache_get_name(struct scache_entry
*ptr
)
146 /* scache_send_flattened_links()
148 * inputs - client to send to
149 * outputs - the cached links, us, and RPL_ENDOFLINKS
153 scache_send_flattened_links(struct Client
*source_p
)
155 struct scache_entry
*scache_ptr
;
159 for (i
= 0; i
< SCACHE_HASH_SIZE
; i
++)
161 scache_ptr
= scache_hash
[i
];
164 if (!irccmp(scache_ptr
->name
, me
.name
))
166 else if (scache_ptr
->flags
& SC_HIDDEN
&&
167 !ConfigServerHide
.disable_hidden
)
169 else if (scache_ptr
->flags
& SC_ONLINE
)
170 show
= scache_ptr
->known_since
< rb_current_time() - ConfigServerHide
.links_delay
;
172 show
= scache_ptr
->last_split
> rb_current_time() - ConfigServerHide
.links_delay
&& scache_ptr
->last_split
- scache_ptr
->known_since
> ConfigServerHide
.links_delay
;
174 sendto_one_numeric(source_p
, RPL_LINKS
, form_str(RPL_LINKS
),
175 scache_ptr
->name
, me
.name
, 1, scache_ptr
->info
);
177 scache_ptr
= scache_ptr
->next
;
180 sendto_one_numeric(source_p
, RPL_LINKS
, form_str(RPL_LINKS
),
181 me
.name
, me
.name
, 0, me
.info
);
183 sendto_one_numeric(source_p
, RPL_ENDOFLINKS
, form_str(RPL_ENDOFLINKS
), "*");
186 #define MISSING_TIMEOUT 86400
188 /* scache_send_missing()
190 * inputs - client to send to
191 * outputs - recently split servers
195 scache_send_missing(struct Client
*source_p
)
197 struct scache_entry
*scache_ptr
;
200 for (i
= 0; i
< SCACHE_HASH_SIZE
; i
++)
202 scache_ptr
= scache_hash
[i
];
205 if (!(scache_ptr
->flags
& SC_ONLINE
) && scache_ptr
->last_split
> rb_current_time() - MISSING_TIMEOUT
)
206 sendto_one_numeric(source_p
, RPL_MAP
, "** %s (recently split)",
209 scache_ptr
= scache_ptr
->next
;
215 * inputs - pointer to where to leave number of servers cached
216 * - pointer to where to leave total memory usage
221 count_scache(size_t * number_servers_cached
, size_t * mem_servers_cached
)
223 struct scache_entry
*scache_ptr
;
226 *number_servers_cached
= 0;
227 *mem_servers_cached
= 0;
229 for (i
= 0; i
< SCACHE_HASH_SIZE
; i
++)
231 scache_ptr
= scache_hash
[i
];
234 *number_servers_cached
= *number_servers_cached
+ 1;
235 *mem_servers_cached
= *mem_servers_cached
+
236 sizeof(struct scache_entry
);
238 scache_ptr
= scache_ptr
->next
;