1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 2019-2021 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19 * USA
20 */
21
22 /*! \file extban_usermode.c
23 * \brief Implements usermode based extended channel bans.
24 * \version $Id: extban_usermode.c 9959 2021-05-29 12:18:46Z michael $
25 */
26
27 #include "stdinc.h"
28 #include "list.h"
29 #include "channel.h"
30 #include "channel_mode.h"
31 #include "client.h"
32 #include "extban.h"
33 #include "user.h"
34
35
36 static enum extban_match
extban_usermode_matches(struct Client * client,struct Channel * channel,struct Ban * ban)37 extban_usermode_matches(struct Client *client, struct Channel *channel, struct Ban *ban)
38 {
39 int what = MODE_ADD;
40 unsigned int modes_del = 0, modes_add = 0;
41
42 for (const char *m = ban->host; *m; ++m)
43 {
44 switch (*m)
45 {
46 case '+':
47 what = MODE_ADD;
48 break;
49 case '-':
50 what = MODE_DEL;
51 break;
52 default:
53 {
54 const struct user_modes *tab = umode_map[(unsigned char)*m];
55
56 switch (what)
57 {
58 case MODE_DEL:
59 if (tab)
60 modes_del |= tab->flag;
61 break;
62 case MODE_ADD:
63 if (tab)
64 modes_add |= tab->flag;
65 break;
66 }
67 }
68 }
69 }
70
71 if ((client->umodes & modes_add) == modes_add &&
72 (client->umodes & modes_del) == 0)
73 return EXTBAN_MATCH;
74
75 return EXTBAN_NO_MATCH;
76 }
77
78 struct Extban extban_usermode =
79 {
80 .character = 'u',
81 .type = EXTBAN_MATCHING,
82 .types = CHFL_BAN | CHFL_EXCEPTION | CHFL_INVEX,
83 .matches = extban_usermode_matches
84 };
85