2 * IRC - Internet Relay Chat, ircd/m_topic.c
3 * Copyright (C) 1990 Jarkko Oikarinen and
4 * University of Oulu, Computing Center
6 * See file AUTHORS in IRC package for additional names of
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)
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.
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.
27 * m_functions execute protocol messages on this server:
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...).
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.
39 * (!IsServer(cptr)) => (cptr == sptr), because
40 * prefixes are taken *only* from servers...
43 * (sptr == cptr) => the message didn't
46 * (sptr != cptr && IsServer(sptr) means
47 * the prefix specified servername. (?)
49 * (sptr != cptr && !IsServer(sptr) means
50 * that message originated from a remote
55 * (!IsServer(sptr)) means that, sptr can safely
56 * taken as defining the target structure of the
57 * message in this server.
59 * *Always* true (if 'parse' and others are working correct):
61 * 1) sptr->from == cptr (note: cptr->from == cptr)
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 ]
68 * parc number of variable parameter strings (if zero,
69 * parv is allowed to be NULL)
71 * parv a NULL terminated list of parameter pointers,
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*
79 * note: it is guaranteed that parv[0]..parv[parc-1] are all
88 #include "ircd_features.h"
90 #include "ircd_reply.h"
91 #include "ircd_string.h"
97 /* #include <assert.h> -- Now using assert in ircd_log.h */
98 #include <stdlib.h> /* for atoi() */
100 static void do_settopic(struct Client *sptr, struct Client *cptr,
101 struct Channel *chptr, char *topic, time_t ts)
103 struct Membership *member;
107 if (feature_bool(FEAT_HIS_BANWHO) && IsServer(sptr))
111 member = find_channel_member(sptr, chptr);
112 /* if +t and not @'d, return an error and ignore the topic */
113 if ((chptr->mode.mode & MODE_TOPICLIMIT) != 0 && (!member || !IsChanOp(member)))
115 send_reply(sptr, ERR_CHANOPRIVSNEEDED, chptr->chname);
118 if (!client_can_send_to_channel(sptr, chptr, 1) && !IsChannelService(sptr)) {
119 send_reply(sptr, ERR_CANNOTSENDTOCHAN, chptr->chname);
122 /* Note if this is just a refresh of an old topic, and don't
123 * send it to all the clients to save bandwidth. We still send
124 * it to other servers as they may have split and lost the topic.
126 newtopic=ircd_strncmp(chptr->topic,topic,TOPICLEN)!=0;
127 /* setting a topic */
128 ircd_strncpy(chptr->topic, topic, TOPICLEN);
129 ircd_strncpy(chptr->topic_nick, cli_name(from), NICKLEN);
130 chptr->topic_time = ts ? ts : TStime();
131 /* Fixed in 2.10.11: Don't propergate local topics */
132 if (!IsLocalChannel(chptr->chname))
133 sendcmdto_serv_butone(sptr, CMD_TOPIC, cptr, "%H %Tu %Tu :%s", chptr,
134 chptr->creationtime, chptr->topic_time, chptr->topic);
136 sendcmdto_channel_butserv_butone(sptr, CMD_TOPIC, chptr, NULL, 0,
137 "%H :%s", chptr, chptr->topic);
138 /* if this is the same topic as before we send it to the person that
139 * set it (so they knew it went through ok), but don't bother sending
140 * it to everyone else on the channel to save bandwidth
142 else if (MyUser(sptr))
143 sendcmdto_one(sptr, CMD_TOPIC, sptr, "%H :%s", chptr, chptr->topic);
147 * m_topic - generic message handler
149 * parv[0] = sender prefix
151 * parv[parc - 1] = topic (if parc > 2)
153 int m_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
155 struct Channel *chptr;
156 char *topic = 0, *name, *p = 0;
159 return need_more_params(sptr, "TOPIC");
162 topic = parv[parc - 1];
164 for (; (name = ircd_strtok(&p, parv[1], ",")); parv[1] = 0)
167 /* Does the channel exist */
168 if (!IsChannelName(name) || !(chptr = FindChannel(name)))
170 send_reply(sptr,ERR_NOSUCHCHANNEL,name);
173 /* Trying to check a topic outside a secret channel */
174 if ((topic || SecretChannel(chptr)) && !find_channel_member(sptr, chptr))
176 send_reply(sptr, ERR_NOTONCHANNEL, chptr->chname);
180 /* only asking for topic */
183 if (chptr->topic[0] == '\0')
184 send_reply(sptr, RPL_NOTOPIC, chptr->chname);
187 send_reply(sptr, RPL_TOPIC, chptr->chname, chptr->topic);
188 send_reply(sptr, RPL_TOPICWHOTIME, chptr->chname, chptr->topic_nick,
193 do_settopic(sptr,cptr,chptr,topic,0);
199 * ms_topic - server message handler
201 * parv[0] = sender prefix
203 * parv[2] = channel timestamp (optional)
204 * parv[3] = topic timestamp (optional)
205 * parv[parc - 1] = topic
207 int ms_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
209 struct Channel *chptr;
210 char *topic = 0, *name, *p = 0;
214 return need_more_params(sptr, "TOPIC");
216 topic = parv[parc - 1];
218 for (; (name = ircd_strtok(&p, parv[1], ",")); parv[1] = 0)
221 /* Does the channel exist */
222 if (!IsChannelName(name) || !(chptr = FindChannel(name)))
224 send_reply(sptr,ERR_NOSUCHCHANNEL,name);
228 /* Ignore requests for topics from remote servers */
229 if (IsLocalChannel(name) && !MyUser(sptr))
231 protocol_violation(sptr,"Topic request");
235 /* If existing channel is older or has newer topic, ignore */
236 if (parc > 3 && (ts = atoi(parv[2])) && chptr->creationtime < ts)
239 if (parc > 4 && (ts = atoi(parv[3])) && chptr->topic_time > ts)
242 do_settopic(sptr,cptr,chptr,topic, ts);