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212380e3 AC |
1 | /* |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * whowas.c: WHOWAS user cache. | |
4 | * | |
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 | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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 | |
22 | * USA | |
23 | * | |
24 | * $Id: whowas.c 1717 2006-07-04 14:41:11Z jilles $ | |
25 | */ | |
26 | ||
27 | #include "stdinc.h" | |
28 | ||
29 | #include "whowas.h" | |
30 | #include "client.h" | |
31 | #include "common.h" | |
32 | #include "hash.h" | |
33 | #include "irc_string.h" | |
34 | #include "ircd.h" | |
35 | #include "ircd_defs.h" | |
36 | #include "numeric.h" | |
37 | #include "s_serv.h" | |
38 | #include "s_user.h" | |
39 | #include "send.h" | |
40 | #include "s_conf.h" | |
41 | #include "memory.h" | |
c88cdb00 | 42 | #include "scache.h" |
212380e3 AC |
43 | |
44 | /* internally defined function */ | |
45 | static void add_whowas_to_clist(struct Whowas **, struct Whowas *); | |
46 | static void del_whowas_from_clist(struct Whowas **, struct Whowas *); | |
47 | static void add_whowas_to_list(struct Whowas **, struct Whowas *); | |
48 | static void del_whowas_from_list(struct Whowas **, struct Whowas *); | |
49 | ||
50 | struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH]; | |
51 | struct Whowas *WHOWASHASH[WW_MAX]; | |
52 | ||
53 | static int whowas_next = 0; | |
54 | ||
55 | unsigned int hash_whowas_name(const char *name) | |
56 | { | |
57 | return fnv_hash_upper((const unsigned char *) name, WW_MAX_BITS); | |
58 | } | |
59 | ||
60 | void add_history(struct Client *client_p, int online) | |
61 | { | |
62 | struct Whowas *who = &WHOWAS[whowas_next]; | |
63 | ||
64 | s_assert(NULL != client_p); | |
65 | ||
66 | if(client_p == NULL) | |
67 | return; | |
68 | ||
69 | if(who->hashv != -1) | |
70 | { | |
71 | if(who->online) | |
72 | del_whowas_from_clist(&(who->online->whowas), who); | |
73 | del_whowas_from_list(&WHOWASHASH[who->hashv], who); | |
74 | } | |
75 | who->hashv = hash_whowas_name(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 | if (!EmptyString(client_p->sockhost) && strcmp(client_p->sockhost, "0") && show_ip(NULL, client_p)) | |
86 | strcpy(who->sockhost, client_p->sockhost); | |
87 | else | |
88 | who->sockhost[0] = '\0'; | |
89 | ||
994544c2 | 90 | who->servername = scache_get_name(client_p->servptr->serv->nameinfo); |
212380e3 AC |
91 | |
92 | if(online) | |
93 | { | |
94 | who->online = client_p; | |
95 | add_whowas_to_clist(&(client_p->whowas), who); | |
96 | } | |
97 | else | |
98 | who->online = NULL; | |
99 | add_whowas_to_list(&WHOWASHASH[who->hashv], who); | |
100 | whowas_next++; | |
101 | if(whowas_next == NICKNAMEHISTORYLENGTH) | |
102 | whowas_next = 0; | |
103 | } | |
104 | ||
105 | void off_history(struct Client *client_p) | |
106 | { | |
107 | struct Whowas *temp, *next; | |
108 | ||
109 | for (temp = client_p->whowas; temp; temp = next) | |
110 | { | |
111 | next = temp->cnext; | |
112 | temp->online = NULL; | |
113 | del_whowas_from_clist(&(client_p->whowas), temp); | |
114 | } | |
115 | } | |
116 | ||
117 | struct Client *get_history(const char *nick, time_t timelimit) | |
118 | { | |
119 | struct Whowas *temp; | |
120 | int blah; | |
121 | ||
122 | timelimit = CurrentTime - timelimit; | |
123 | blah = hash_whowas_name(nick); | |
124 | temp = WHOWASHASH[blah]; | |
125 | for (; temp; temp = temp->next) | |
126 | { | |
127 | if(irccmp(nick, temp->name)) | |
128 | continue; | |
129 | if(temp->logoff < timelimit) | |
130 | continue; | |
131 | return temp->online; | |
132 | } | |
133 | return NULL; | |
134 | } | |
135 | ||
136 | void count_whowas_memory(size_t * wwu, size_t * wwum) | |
137 | { | |
138 | struct Whowas *tmp; | |
139 | int i; | |
140 | size_t u = 0; | |
141 | size_t um = 0; | |
142 | ||
143 | /* count the number of used whowas structs in 'u' */ | |
144 | /* count up the memory used of whowas structs in um */ | |
145 | ||
146 | for (i = 0, tmp = &WHOWAS[0]; i < NICKNAMEHISTORYLENGTH; i++, tmp++) | |
147 | if(tmp->hashv != -1) | |
148 | { | |
149 | u++; | |
150 | um += sizeof(struct Whowas); | |
151 | } | |
152 | *wwu = u; | |
153 | *wwum = um; | |
154 | return; | |
155 | } | |
156 | ||
157 | void | |
158 | initwhowas() | |
159 | { | |
160 | int i; | |
161 | ||
162 | for (i = 0; i < NICKNAMEHISTORYLENGTH; i++) | |
163 | { | |
164 | memset((void *) &WHOWAS[i], 0, sizeof(struct Whowas)); | |
165 | WHOWAS[i].hashv = -1; | |
166 | } | |
167 | for (i = 0; i < WW_MAX; i++) | |
168 | WHOWASHASH[i] = NULL; | |
169 | } | |
170 | ||
171 | ||
172 | static void | |
173 | add_whowas_to_clist(struct Whowas **bucket, struct Whowas *whowas) | |
174 | { | |
175 | whowas->cprev = NULL; | |
176 | if((whowas->cnext = *bucket) != NULL) | |
177 | whowas->cnext->cprev = whowas; | |
178 | *bucket = whowas; | |
179 | } | |
180 | ||
181 | static void | |
182 | del_whowas_from_clist(struct Whowas **bucket, struct Whowas *whowas) | |
183 | { | |
184 | if(whowas->cprev) | |
185 | whowas->cprev->cnext = whowas->cnext; | |
186 | else | |
187 | *bucket = whowas->cnext; | |
188 | if(whowas->cnext) | |
189 | whowas->cnext->cprev = whowas->cprev; | |
190 | } | |
191 | ||
192 | static void | |
193 | add_whowas_to_list(struct Whowas **bucket, struct Whowas *whowas) | |
194 | { | |
195 | whowas->prev = NULL; | |
196 | if((whowas->next = *bucket) != NULL) | |
197 | whowas->next->prev = whowas; | |
198 | *bucket = whowas; | |
199 | } | |
200 | ||
201 | static void | |
202 | del_whowas_from_list(struct Whowas **bucket, struct Whowas *whowas) | |
203 | { | |
204 | if(whowas->prev) | |
205 | whowas->prev->next = whowas->next; | |
206 | else | |
207 | *bucket = whowas->next; | |
208 | if(whowas->next) | |
209 | whowas->next->prev = whowas->prev; | |
210 | } |