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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" | |
4562c604 | 33 | #include "match.h" |
212380e3 AC |
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" | |
c88cdb00 | 41 | #include "scache.h" |
77d3d2db | 42 | #include "s_assert.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); | |
e3354945 | 76 | who->logoff = rb_current_time(); |
212380e3 AC |
77 | /* |
78 | * NOTE: strcpy ok here, the sizes in the client struct MUST | |
79 | * match the sizes in the whowas struct | |
80 | */ | |
f427c8b0 | 81 | rb_strlcpy(who->name, client_p->name, sizeof(who->name)); |
212380e3 AC |
82 | strcpy(who->username, client_p->username); |
83 | strcpy(who->hostname, client_p->host); | |
84 | strcpy(who->realname, client_p->info); | |
01b7a527 | 85 | strcpy(who->suser, client_p->user->suser); |
364e59f8 JT |
86 | strcpy(who->sockhost, client_p->sockhost); |
87 | who->flags = (IsIPSpoof(client_p) ? WHOWAS_IP_SPOOFING : 0) | | |
88 | (IsDynSpoof(client_p) ? WHOWAS_DYNSPOOF : 0); | |
212380e3 | 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 | ||
e3354945 | 122 | timelimit = rb_current_time() - timelimit; |
212380e3 AC |
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 | { | |
309e4fd0 JT |
138 | *wwu = NICKNAMEHISTORYLENGTH; |
139 | *wwum = NICKNAMEHISTORYLENGTH * sizeof(struct Whowas); | |
212380e3 AC |
140 | } |
141 | ||
142 | void | |
143 | initwhowas() | |
144 | { | |
145 | int i; | |
146 | ||
147 | for (i = 0; i < NICKNAMEHISTORYLENGTH; i++) | |
148 | { | |
149 | memset((void *) &WHOWAS[i], 0, sizeof(struct Whowas)); | |
150 | WHOWAS[i].hashv = -1; | |
151 | } | |
152 | for (i = 0; i < WW_MAX; i++) | |
153 | WHOWASHASH[i] = NULL; | |
154 | } | |
155 | ||
156 | ||
157 | static void | |
158 | add_whowas_to_clist(struct Whowas **bucket, struct Whowas *whowas) | |
159 | { | |
160 | whowas->cprev = NULL; | |
161 | if((whowas->cnext = *bucket) != NULL) | |
162 | whowas->cnext->cprev = whowas; | |
163 | *bucket = whowas; | |
164 | } | |
165 | ||
166 | static void | |
167 | del_whowas_from_clist(struct Whowas **bucket, struct Whowas *whowas) | |
168 | { | |
169 | if(whowas->cprev) | |
170 | whowas->cprev->cnext = whowas->cnext; | |
171 | else | |
172 | *bucket = whowas->cnext; | |
173 | if(whowas->cnext) | |
174 | whowas->cnext->cprev = whowas->cprev; | |
175 | } | |
176 | ||
177 | static void | |
178 | add_whowas_to_list(struct Whowas **bucket, struct Whowas *whowas) | |
179 | { | |
180 | whowas->prev = NULL; | |
181 | if((whowas->next = *bucket) != NULL) | |
182 | whowas->next->prev = whowas; | |
183 | *bucket = whowas; | |
184 | } | |
185 | ||
186 | static void | |
187 | del_whowas_from_list(struct Whowas **bucket, struct Whowas *whowas) | |
188 | { | |
189 | if(whowas->prev) | |
190 | whowas->prev->next = whowas->next; | |
191 | else | |
192 | *bucket = whowas->next; | |
193 | if(whowas->next) | |
194 | whowas->next->prev = whowas->prev; | |
195 | } |