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root/svn/ircd-hybrid-8/modules/m_knock.c
Revision: 1230
Committed: Thu Sep 22 19:41:19 2011 UTC (12 years, 5 months ago) by michael
Content type: text/x-csrc
File size: 5306 byte(s)
Log Message:
- cleanup module loader. Make module api more flexible

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3 * m_knock.c: Requests to be invited to a channel.
4 *
5 * Copyright (C) 2002 by the past and present ircd coders, and others.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20 * USA
21 *
22 * $Id$
23 */
24
25 #include "stdinc.h"
26 #include "list.h"
27 #include "handlers.h"
28 #include "channel.h"
29 #include "channel_mode.h"
30 #include "client.h"
31 #include "hash.h"
32 #include "irc_string.h"
33 #include "sprintf_irc.h"
34 #include "ircd.h"
35 #include "numeric.h"
36 #include "send.h"
37 #include "s_conf.h"
38 #include "msg.h"
39 #include "parse.h"
40 #include "modules.h"
41 #include "s_serv.h"
42 #include "s_user.h"
43
44
45 /* m_knock
46 * parv[0] = sender prefix
47 * parv[1] = channel
48 *
49 * The KNOCK command has the following syntax:
50 * :<sender> KNOCK <channel>
51 *
52 * If a user is not banned from the channel they can use the KNOCK
53 * command to have the server NOTICE the channel operators notifying
54 * they would like to join. Helpful if the channel is invite-only, the
55 * key is forgotten, or the channel is full (INVITE can bypass each one
56 * of these conditions. Concept by Dianora <db@db.net> and written by
57 * <anonymous>
58 */
59 static void
60 m_knock(struct Client *client_p, struct Client *source_p,
61 int parc, char *parv[])
62 {
63 struct Channel *chptr = NULL;
64
65 if (EmptyString(parv[1]))
66 {
67 sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
68 me.name, source_p->name, "KNOCK");
69 return;
70 }
71
72 if (!ConfigChannel.use_knock && MyClient(source_p))
73 {
74 sendto_one(source_p, form_str(ERR_KNOCKDISABLED),
75 me.name, source_p->name);
76 return;
77 }
78
79 if ((chptr = hash_find_channel(parv[1])) == NULL)
80 {
81 sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
82 me.name, source_p->name, parv[1]);
83 return;
84 }
85
86 /* Normal channel, just be sure they aren't on it */
87 if (IsMember(source_p, chptr))
88 {
89 sendto_one(source_p, form_str(ERR_KNOCKONCHAN), me.name,
90 source_p->name, chptr->chname);
91 return;
92 }
93
94 if (!((chptr->mode.mode & MODE_INVITEONLY) || (*chptr->mode.key) ||
95 (chptr->mode.limit && dlink_list_length(&chptr->members) >=
96 chptr->mode.limit)))
97 {
98 sendto_one(source_p, form_str(ERR_CHANOPEN), me.name,
99 source_p->name, chptr->chname);
100 return;
101 }
102
103 if (MyClient(source_p))
104 {
105 /*
106 * Don't allow a knock if the user is banned, or the channel is private
107 */
108 if (PrivateChannel(chptr) || is_banned(chptr, source_p))
109 {
110 sendto_one(source_p, form_str(ERR_CANNOTSENDTOCHAN),
111 me.name, source_p->name, chptr->chname);
112 return;
113 }
114
115 /*
116 * flood protection:
117 * allow one knock per user per knock_delay
118 * allow one knock per channel per knock_delay_channel
119 *
120 * we only limit local requests..
121 */
122 if ((source_p->localClient->last_knock + ConfigChannel.knock_delay) >
123 CurrentTime)
124 {
125 sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
126 source_p->name, chptr->chname, "user");
127 return;
128 }
129
130 if ((chptr->last_knock + ConfigChannel.knock_delay_channel) > CurrentTime)
131 {
132 sendto_one(source_p, form_str(ERR_TOOMANYKNOCK), me.name,
133 source_p->name, chptr->chname, "channel");
134 return;
135 }
136
137 source_p->localClient->last_knock = CurrentTime;
138
139 sendto_one(source_p, form_str(RPL_KNOCKDLVR), me.name,
140 source_p->name, chptr->chname);
141 }
142
143 chptr->last_knock = CurrentTime;
144
145 if (ConfigChannel.use_knock)
146 sendto_channel_local(CHFL_CHANOP, 0, chptr, form_str(RPL_KNOCK),
147 me.name, chptr->chname, chptr->chname,
148 source_p->name, source_p->username,
149 source_p->host);
150
151 sendto_server(client_p, chptr, CAP_KNOCK|CAP_TS6, NOCAPS,
152 ":%s KNOCK %s", ID(source_p), chptr->chname);
153 sendto_server(client_p, chptr, CAP_KNOCK, CAP_TS6,
154 ":%s KNOCK %s", source_p->name, chptr->chname);
155 }
156
157 static struct Message knock_msgtab = {
158 "KNOCK", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
159 { m_unregistered, m_knock, m_knock, m_ignore, m_knock, m_ignore }
160 };
161
162 static void
163 module_init(void)
164 {
165 mod_add_cmd(&knock_msgtab);
166 add_capability("KNOCK", CAP_KNOCK, 1);
167 add_isupport("KNOCK", NULL, -1);
168 }
169
170 static void
171 module_exit(void)
172 {
173 mod_del_cmd(&knock_msgtab);
174 delete_capability("KNOCK");
175 delete_isupport("KNOCK");
176 }
177
178 struct module module_entry = {
179 .node = { NULL, NULL, NULL },
180 .name = NULL,
181 .version = "$Revision$",
182 .handle = NULL,
183 .modinit = module_init,
184 .modexit = module_exit,
185 .flags = 0
186 };

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svn:eol-style native
svn:keywords Id Revision