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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 "match.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 "scache.h" | |
42 | ||
43 | /* internally defined function */ | |
44 | static void add_whowas_to_clist(struct Whowas **, struct Whowas *); | |
45 | static void del_whowas_from_clist(struct Whowas **, struct Whowas *); | |
46 | static void add_whowas_to_list(struct Whowas **, struct Whowas *); | |
47 | static void del_whowas_from_list(struct Whowas **, struct Whowas *); | |
48 | ||
49 | struct Whowas WHOWAS[NICKNAMEHISTORYLENGTH]; | |
50 | struct Whowas *WHOWASHASH[WW_MAX]; | |
51 | ||
52 | static int whowas_next = 0; | |
53 | ||
54 | unsigned int hash_whowas_name(const char *name) | |
55 | { | |
56 | return fnv_hash_upper((const unsigned char *) name, WW_MAX_BITS); | |
57 | } | |
58 | ||
59 | void add_history(struct Client *client_p, int online) | |
60 | { | |
61 | struct Whowas *who = &WHOWAS[whowas_next]; | |
62 | ||
63 | s_assert(NULL != client_p); | |
64 | ||
65 | if(client_p == NULL) | |
66 | return; | |
67 | ||
68 | if(who->hashv != -1) | |
69 | { | |
70 | if(who->online) | |
71 | del_whowas_from_clist(&(who->online->whowas), who); | |
72 | del_whowas_from_list(&WHOWASHASH[who->hashv], who); | |
73 | } | |
74 | who->hashv = hash_whowas_name(client_p->name); | |
75 | who->logoff = rb_current_time(); | |
76 | /* | |
77 | * NOTE: strcpy ok here, the sizes in the client struct MUST | |
78 | * match the sizes in the whowas struct | |
79 | */ | |
80 | rb_strlcpy(who->name, client_p->name, sizeof(who->name)); | |
81 | strcpy(who->username, client_p->username); | |
82 | strcpy(who->hostname, client_p->host); | |
83 | strcpy(who->realname, client_p->info); | |
84 | if (!EmptyString(client_p->sockhost) && strcmp(client_p->sockhost, "0") && show_ip(NULL, client_p)) | |
85 | strcpy(who->sockhost, client_p->sockhost); | |
86 | else | |
87 | who->sockhost[0] = '\0'; | |
88 | ||
89 | who->servername = scache_get_name(client_p->servptr->serv->nameinfo); | |
90 | ||
91 | if(online) | |
92 | { | |
93 | who->online = client_p; | |
94 | add_whowas_to_clist(&(client_p->whowas), who); | |
95 | } | |
96 | else | |
97 | who->online = NULL; | |
98 | add_whowas_to_list(&WHOWASHASH[who->hashv], who); | |
99 | whowas_next++; | |
100 | if(whowas_next == NICKNAMEHISTORYLENGTH) | |
101 | whowas_next = 0; | |
102 | } | |
103 | ||
104 | void off_history(struct Client *client_p) | |
105 | { | |
106 | struct Whowas *temp, *next; | |
107 | ||
108 | for (temp = client_p->whowas; temp; temp = next) | |
109 | { | |
110 | next = temp->cnext; | |
111 | temp->online = NULL; | |
112 | del_whowas_from_clist(&(client_p->whowas), temp); | |
113 | } | |
114 | } | |
115 | ||
116 | struct Client *get_history(const char *nick, time_t timelimit) | |
117 | { | |
118 | struct Whowas *temp; | |
119 | int blah; | |
120 | ||
121 | timelimit = rb_current_time() - timelimit; | |
122 | blah = hash_whowas_name(nick); | |
123 | temp = WHOWASHASH[blah]; | |
124 | for (; temp; temp = temp->next) | |
125 | { | |
126 | if(irccmp(nick, temp->name)) | |
127 | continue; | |
128 | if(temp->logoff < timelimit) | |
129 | continue; | |
130 | return temp->online; | |
131 | } | |
132 | return NULL; | |
133 | } | |
134 | ||
135 | void count_whowas_memory(size_t * wwu, size_t * wwum) | |
136 | { | |
137 | *wwu = NICKNAMEHISTORYLENGTH; | |
138 | *wwum = NICKNAMEHISTORYLENGTH * sizeof(struct Whowas); | |
139 | } | |
140 | ||
141 | void | |
142 | initwhowas() | |
143 | { | |
144 | int i; | |
145 | ||
146 | for (i = 0; i < NICKNAMEHISTORYLENGTH; i++) | |
147 | { | |
148 | memset((void *) &WHOWAS[i], 0, sizeof(struct Whowas)); | |
149 | WHOWAS[i].hashv = -1; | |
150 | } | |
151 | for (i = 0; i < WW_MAX; i++) | |
152 | WHOWASHASH[i] = NULL; | |
153 | } | |
154 | ||
155 | ||
156 | static void | |
157 | add_whowas_to_clist(struct Whowas **bucket, struct Whowas *whowas) | |
158 | { | |
159 | whowas->cprev = NULL; | |
160 | if((whowas->cnext = *bucket) != NULL) | |
161 | whowas->cnext->cprev = whowas; | |
162 | *bucket = whowas; | |
163 | } | |
164 | ||
165 | static void | |
166 | del_whowas_from_clist(struct Whowas **bucket, struct Whowas *whowas) | |
167 | { | |
168 | if(whowas->cprev) | |
169 | whowas->cprev->cnext = whowas->cnext; | |
170 | else | |
171 | *bucket = whowas->cnext; | |
172 | if(whowas->cnext) | |
173 | whowas->cnext->cprev = whowas->cprev; | |
174 | } | |
175 | ||
176 | static void | |
177 | add_whowas_to_list(struct Whowas **bucket, struct Whowas *whowas) | |
178 | { | |
179 | whowas->prev = NULL; | |
180 | if((whowas->next = *bucket) != NULL) | |
181 | whowas->next->prev = whowas; | |
182 | *bucket = whowas; | |
183 | } | |
184 | ||
185 | static void | |
186 | del_whowas_from_list(struct Whowas **bucket, struct Whowas *whowas) | |
187 | { | |
188 | if(whowas->prev) | |
189 | whowas->prev->next = whowas->next; | |
190 | else | |
191 | *bucket = whowas->next; | |
192 | if(whowas->next) | |
193 | whowas->next->prev = whowas->prev; | |
194 | } |