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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_invite.c | |
3 | * Copyright (C) 1990 Jarkko Oikarinen and | |
4 | * University of Oulu, Computing Center | |
5 | * | |
6 | * See file AUTHORS in IRC package for additional names of | |
7 | * the programmers. | |
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 1, or (at your option) | |
12 | * 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., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * $Id: m_invite.c,v 1.25 2005/09/13 15:17:46 entrope Exp $ | |
24 | */ | |
25 | ||
26 | /* | |
27 | * m_functions execute protocol messages on this server: | |
28 | * | |
29 | * cptr is always NON-NULL, pointing to a *LOCAL* client | |
30 | * structure (with an open socket connected!). This | |
31 | * identifies the physical socket where the message | |
32 | * originated (or which caused the m_function to be | |
33 | * executed--some m_functions may call others...). | |
34 | * | |
35 | * sptr is the source of the message, defined by the | |
36 | * prefix part of the message if present. If not | |
37 | * or prefix not found, then sptr==cptr. | |
38 | * | |
39 | * (!IsServer(cptr)) => (cptr == sptr), because | |
40 | * prefixes are taken *only* from servers... | |
41 | * | |
42 | * (IsServer(cptr)) | |
43 | * (sptr == cptr) => the message didn't | |
44 | * have the prefix. | |
45 | * | |
46 | * (sptr != cptr && IsServer(sptr) means | |
47 | * the prefix specified servername. (?) | |
48 | * | |
49 | * (sptr != cptr && !IsServer(sptr) means | |
50 | * that message originated from a remote | |
51 | * user (not local). | |
52 | * | |
53 | * combining | |
54 | * | |
55 | * (!IsServer(sptr)) means that, sptr can safely | |
56 | * taken as defining the target structure of the | |
57 | * message in this server. | |
58 | * | |
59 | * *Always* true (if 'parse' and others are working correct): | |
60 | * | |
61 | * 1) sptr->from == cptr (note: cptr->from == cptr) | |
62 | * | |
63 | * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr | |
64 | * *cannot* be a local connection, unless it's | |
65 | * actually cptr!). [MyConnect(x) should probably | |
66 | * be defined as (x == x->from) --msa ] | |
67 | * | |
68 | * parc number of variable parameter strings (if zero, | |
69 | * parv is allowed to be NULL) | |
70 | * | |
71 | * parv a NULL terminated list of parameter pointers, | |
72 | * | |
73 | * parv[0], sender (prefix string), if not present | |
74 | * this points to an empty string. | |
75 | * parv[1]...parv[parc-1] | |
76 | * pointers to additional parameters | |
77 | * parv[parc] == NULL, *always* | |
78 | * | |
79 | * note: it is guaranteed that parv[0]..parv[parc-1] are all | |
80 | * non-NULL pointers. | |
81 | */ | |
82 | #include "config.h" | |
83 | ||
84 | #include "channel.h" | |
85 | #include "client.h" | |
86 | #include "hash.h" | |
87 | #include "ircd.h" | |
88 | #include "ircd_features.h" | |
89 | #include "ircd_log.h" | |
90 | #include "ircd_reply.h" | |
91 | #include "ircd_string.h" | |
92 | #include "list.h" | |
93 | #include "msg.h" | |
94 | #include "numeric.h" | |
95 | #include "numnicks.h" | |
96 | #include "s_user.h" | |
97 | #include "send.h" | |
98 | #include "struct.h" | |
99 | ||
100 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
101 | ||
102 | /* | |
103 | * m_invite - generic message handler | |
104 | * | |
105 | * parv[0] - sender prefix | |
106 | * parv[1] - user to invite | |
107 | * parv[2] - channel name | |
108 | * | |
109 | * - INVITE now is accepted only if who does it is chanop (this of course | |
110 | * implies that channel must exist and he must be on it). | |
111 | * | |
112 | * - On the other side it IS processed even if channel is NOT invite only | |
113 | * leaving room for other enhancements like inviting banned ppl. -- Nemesi | |
114 | * | |
115 | * - Invite with no parameters now lists the channels you are invited to. | |
116 | * - Isomer 23 Oct 99 | |
117 | */ | |
118 | int m_invite(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
119 | { | |
120 | struct Client *acptr; | |
121 | struct Channel *chptr; | |
122 | ||
123 | if (parc < 2 ) { | |
124 | /* | |
125 | * list the channels you have an invite to. | |
126 | */ | |
127 | struct SLink *lp; | |
128 | for (lp = cli_user(sptr)->invited; lp; lp = lp->next) | |
129 | send_reply(cptr, RPL_INVITELIST, lp->value.chptr->chname); | |
130 | send_reply(cptr, RPL_ENDOFINVITELIST); | |
131 | return 0; | |
132 | } | |
133 | ||
134 | if (parc < 3 || EmptyString(parv[2])) | |
135 | return need_more_params(sptr, "INVITE"); | |
136 | ||
137 | if (!(acptr = FindUser(parv[1]))) { | |
138 | send_reply(sptr, ERR_NOSUCHNICK, parv[1]); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | if (is_silenced(sptr, acptr)) | |
143 | return 0; | |
144 | ||
145 | if (!IsChannelName(parv[2]) | |
146 | || !strIsIrcCh(parv[2]) | |
147 | || !(chptr = FindChannel(parv[2]))) { | |
148 | send_reply(sptr, ERR_NOSUCHCHANNEL, parv[2]); | |
149 | return 0; | |
150 | } | |
151 | ||
152 | if (!find_channel_member(sptr, chptr)) { | |
153 | send_reply(sptr, ERR_NOTONCHANNEL, chptr->chname); | |
154 | return 0; | |
155 | } | |
156 | ||
157 | if (find_channel_member(acptr, chptr)) { | |
158 | send_reply(sptr, ERR_USERONCHANNEL, cli_name(acptr), chptr->chname); | |
159 | return 0; | |
160 | } | |
161 | ||
162 | if (!is_chan_op(sptr, chptr)) { | |
163 | send_reply(sptr, ERR_CHANOPRIVSNEEDED, chptr->chname); | |
164 | return 0; | |
165 | } | |
166 | ||
167 | /* If we get here, it was a VALID and meaningful INVITE */ | |
168 | ||
d8e74551 | 169 | if (IsAccountOnly(acptr) && !IsAccount(sptr) && !IsOper(sptr)) { |
170 | send_reply(sptr, ERR_ACCOUNTONLY, cli_name(acptr)); | |
171 | return 0; | |
172 | } | |
173 | ||
189935b1 | 174 | if (check_target_limit(sptr, acptr, cli_name(acptr), 0)) |
175 | return 0; | |
176 | ||
177 | send_reply(sptr, RPL_INVITING, cli_name(acptr), chptr->chname); | |
178 | ||
179 | if (cli_user(acptr)->away) | |
180 | send_reply(sptr, RPL_AWAY, cli_name(acptr), cli_user(acptr)->away); | |
181 | ||
182 | if (MyConnect(acptr)) { | |
183 | add_invite(acptr, chptr); | |
184 | sendcmdto_one(sptr, CMD_INVITE, acptr, "%s %H", cli_name(acptr), chptr); | |
185 | } else if (!IsLocalChannel(chptr->chname)) { | |
186 | sendcmdto_one(sptr, CMD_INVITE, acptr, "%s %H %Tu", cli_name(acptr), chptr, | |
187 | chptr->creationtime); | |
188 | } | |
189 | ||
190 | if (!IsLocalChannel(chptr->chname) || MyConnect(acptr)) { | |
191 | if (feature_bool(FEAT_ANNOUNCE_INVITES)) { | |
192 | /* Announce to channel operators. */ | |
193 | sendcmdto_channel_butserv_butone(&his, get_error_numeric(RPL_ISSUEDINVITE)->str, | |
194 | NULL, chptr, sptr, SKIP_NONOPS, | |
195 | "%H %C %C :%C has been invited by %C", | |
196 | chptr, acptr, sptr, acptr, sptr); | |
197 | /* Announce to servers with channel operators. */ | |
198 | sendcmdto_channel_servers_butone(sptr, NULL, TOK_INVITE, chptr, acptr, SKIP_NONOPS, | |
199 | "%s %H %Tu", cli_name(acptr), | |
200 | chptr, chptr->creationtime); | |
201 | } | |
202 | } | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | /* | |
208 | * ms_invite - server message handler | |
209 | * | |
210 | * parv[0] - sender prefix | |
211 | * parv[1] - user to invite | |
212 | * parv[2] - channel name | |
213 | * parv[3] - (optional) channel timestamp | |
214 | * | |
215 | * - INVITE now is accepted only if who does it is chanop (this of course | |
216 | * implies that channel must exist and he must be on it). | |
217 | * | |
218 | * - On the other side it IS processed even if channel is NOT invite only | |
219 | * leaving room for other enhancements like inviting banned ppl. -- Nemesi | |
220 | * | |
221 | * - Invite with no parameters now lists the channels you are invited to. | |
222 | * - Isomer 23 Oct 99 | |
223 | * | |
224 | * - Invite with too-late timestamp, or with no timestamp from a bursting | |
225 | * server, is silently discarded. - Entrope 19 Jan 05 | |
226 | */ | |
227 | int ms_invite(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
228 | { | |
229 | struct Client *acptr; | |
230 | struct Channel *chptr; | |
231 | time_t invite_ts; | |
232 | ||
233 | if (IsServer(sptr)) { | |
234 | /* | |
235 | * this will blow up if we get an invite from a server | |
236 | * we look for channel membership in sptr below. | |
237 | */ | |
238 | return protocol_violation(sptr,"Server attempting to invite"); | |
239 | } | |
240 | if (parc < 3 || EmptyString(parv[2])) { | |
241 | /* | |
242 | * should have been handled upstream, ignore it. | |
243 | */ | |
244 | protocol_violation(sptr,"Too few arguments to invite"); | |
245 | return need_more_params(sptr,"INVITE"); | |
246 | } | |
247 | if (!IsGlobalChannel(parv[2])) { | |
248 | /* | |
249 | * should not be sent | |
250 | */ | |
251 | return protocol_violation(sptr, "Invite to a non-standard channel %s",parv[2]); | |
252 | } | |
253 | if (!(acptr = FindUser(parv[1]))) { | |
254 | send_reply(sptr, ERR_NOSUCHNICK, parv[1]); | |
255 | return 0; | |
256 | } | |
257 | ||
258 | if (!(chptr = FindChannel(parv[2]))) { | |
259 | /* | |
260 | * allow invites to non existent channels, bleah | |
261 | * avoid JOIN, INVITE, PART abuse | |
262 | */ | |
263 | sendcmdto_one(sptr, CMD_INVITE, acptr, "%C :%s", acptr, parv[2]); | |
264 | return 0; | |
265 | } | |
266 | ||
267 | if (parc > 3) { | |
268 | invite_ts = atoi(parv[3]); | |
269 | if (invite_ts > chptr->creationtime) | |
270 | return 0; | |
271 | } else if (IsBurstOrBurstAck(cptr)) | |
272 | return 0; | |
273 | ||
274 | if (!IsChannelService(sptr) && !find_channel_member(sptr, chptr)) { | |
275 | send_reply(sptr, ERR_NOTONCHANNEL, chptr->chname); | |
276 | return 0; | |
277 | } | |
278 | ||
279 | if (find_channel_member(acptr, chptr)) { | |
280 | send_reply(sptr, ERR_USERONCHANNEL, cli_name(acptr), chptr->chname); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | if (is_silenced(sptr, acptr)) | |
285 | return 0; | |
286 | ||
287 | if (MyConnect(acptr)) { | |
288 | add_invite(acptr, chptr); | |
289 | sendcmdto_one(sptr, CMD_INVITE, acptr, "%s %H", cli_name(acptr), chptr); | |
290 | } else { | |
291 | sendcmdto_one(sptr, CMD_INVITE, acptr, "%s %H %Tu", cli_name(acptr), chptr, | |
292 | chptr->creationtime); | |
293 | } | |
294 | ||
295 | if (feature_bool(FEAT_ANNOUNCE_INVITES)) { | |
296 | /* Announce to channel operators. */ | |
297 | sendcmdto_channel_butserv_butone(&his, get_error_numeric(RPL_ISSUEDINVITE)->str, | |
298 | NULL, chptr, sptr, SKIP_NONOPS, | |
299 | "%H %C %C :%C has been invited by %C", | |
300 | chptr, acptr, sptr, acptr, sptr); | |
301 | /* Announce to servers with channel operators. */ | |
302 | sendcmdto_channel_servers_butone(sptr, NULL, TOK_INVITE, chptr, acptr, SKIP_NONOPS, | |
303 | "%s %H %Tu", cli_name(acptr), chptr, | |
304 | chptr->creationtime); | |
305 | } | |
306 | ||
307 | return 0; | |
308 | } |