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jfr.im git - solanum.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
24 * $Id: scache.c 6 2005-09-10 01:02:21Z nenolod $
39 * ircd used to store full servernames in anUser as well as in the
40 * whowas info. there can be some 40k such structures alive at any
41 * given time, while the number of unique server names a server sees
42 * in its lifetime is at most a few hundred. by tokenizing server
43 * names internally, the server can easily save 2 or 3 megs of RAM.
46 * reworked to serve for flattening/delaying /links also
51 #define SCACHE_HASH_SIZE 257
58 char name
[HOSTLEN
+ 1];
59 char info
[REALLEN
+ 1];
64 struct scache_entry
*next
;
67 static struct scache_entry
*scache_hash
[SCACHE_HASH_SIZE
];
70 clear_scache_hash_table(void)
72 memset(scache_hash
, 0, sizeof(scache_hash
));
76 sc_hash(const char *string
)
83 hash_value
+= ToLower(*string
++);
86 return hash_value
% SCACHE_HASH_SIZE
;
89 static struct scache_entry
*
90 find_or_add(const char *name
)
93 struct scache_entry
*ptr
;
95 ptr
= scache_hash
[hash_index
= sc_hash(name
)];
96 for (; ptr
; ptr
= ptr
->next
)
98 if(!irccmp(ptr
->name
, name
))
102 ptr
= (struct scache_entry
*) rb_malloc(sizeof(struct scache_entry
));
105 rb_strlcpy(ptr
->name
, name
, sizeof(ptr
->name
));
108 ptr
->known_since
= rb_current_time();
109 ptr
->last_connect
= 0;
112 ptr
->next
= scache_hash
[hash_index
];
113 scache_hash
[hash_index
] = ptr
;
117 struct scache_entry
*
118 scache_connect(const char *name
, const char *info
, int hidden
)
120 struct scache_entry
*ptr
;
122 ptr
= find_or_add(name
);
123 rb_strlcpy(ptr
->info
, info
, sizeof(ptr
->info
));
124 ptr
->flags
|= SC_ONLINE
;
126 ptr
->flags
|= SC_HIDDEN
;
128 ptr
->flags
&= ~SC_HIDDEN
;
129 ptr
->last_connect
= rb_current_time();
134 scache_split(struct scache_entry
*ptr
)
138 ptr
->flags
&= ~SC_ONLINE
;
139 ptr
->last_split
= rb_current_time();
142 const char *scache_get_name(struct scache_entry
*ptr
)
147 /* scache_send_flattened_links()
149 * inputs - client to send to
150 * outputs - the cached links, us, and RPL_ENDOFLINKS
154 scache_send_flattened_links(struct Client
*source_p
)
156 struct scache_entry
*scache_ptr
;
160 for (i
= 0; i
< SCACHE_HASH_SIZE
; i
++)
162 scache_ptr
= scache_hash
[i
];
165 if (!irccmp(scache_ptr
->name
, me
.name
))
167 else if (scache_ptr
->flags
& SC_HIDDEN
&&
168 !ConfigServerHide
.disable_hidden
)
170 else if (scache_ptr
->flags
& SC_ONLINE
)
171 show
= scache_ptr
->known_since
< rb_current_time() - ConfigServerHide
.links_delay
;
173 show
= scache_ptr
->last_split
> rb_current_time() - ConfigServerHide
.links_delay
&& scache_ptr
->last_split
- scache_ptr
->known_since
> ConfigServerHide
.links_delay
;
175 sendto_one_numeric(source_p
, RPL_LINKS
, form_str(RPL_LINKS
),
176 scache_ptr
->name
, me
.name
, 1, scache_ptr
->info
);
178 scache_ptr
= scache_ptr
->next
;
181 sendto_one_numeric(source_p
, RPL_LINKS
, form_str(RPL_LINKS
),
182 me
.name
, me
.name
, 0, me
.info
);
184 sendto_one_numeric(source_p
, RPL_ENDOFLINKS
, form_str(RPL_ENDOFLINKS
), "*");
187 #define MISSING_TIMEOUT 86400
189 /* scache_send_missing()
191 * inputs - client to send to
192 * outputs - recently split servers
196 scache_send_missing(struct Client
*source_p
)
198 struct scache_entry
*scache_ptr
;
201 for (i
= 0; i
< SCACHE_HASH_SIZE
; i
++)
203 scache_ptr
= scache_hash
[i
];
206 if (!(scache_ptr
->flags
& SC_ONLINE
) && scache_ptr
->last_split
> rb_current_time() - MISSING_TIMEOUT
)
207 sendto_one_numeric(source_p
, RPL_MAP
, "** %s (recently split)",
210 scache_ptr
= scache_ptr
->next
;
216 * inputs - pointer to where to leave number of servers cached
217 * - pointer to where to leave total memory usage
222 count_scache(size_t * number_servers_cached
, size_t * mem_servers_cached
)
224 struct scache_entry
*scache_ptr
;
227 *number_servers_cached
= 0;
228 *mem_servers_cached
= 0;
230 for (i
= 0; i
< SCACHE_HASH_SIZE
; i
++)
232 scache_ptr
= scache_hash
[i
];
235 *number_servers_cached
= *number_servers_cached
+ 1;
236 *mem_servers_cached
= *mem_servers_cached
+
237 sizeof(struct scache_entry
);
239 scache_ptr
= scache_ptr
->next
;