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ircu2/ircd/m_topic.c

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/*
* IRC - Internet Relay Chat, ircd/m_topic.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: m_topic.c 1938 2010-01-07 03:23:57Z entrope $
*/
#include "config.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_snprintf.h"
#include "ircd_string.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "send.h"
/* #include <assert.h> -- Now using assert in ircd_log.h */
#include <stdlib.h> /* for atoi() */
/** Set a channel topic or report an error.
* @param[in] sptr Original topic setter.
* @param[in] cptr Neighbor that sent the topic message.
* @param[in] chptr Channel to set topic on.
* @param[in] topic New topic.
* @param[in] ts Timestamp that topic was set (0 for current time).
*/
static void do_settopic(struct Client *sptr, struct Client *cptr,
struct Channel *chptr, char *topic, time_t ts, char *setter)
{
struct Client *from;
char* p = 0;
char* nicktok = NULL;
char nick[NICKLEN + 1];
int newtopic;
if (feature_bool(FEAT_HIS_BANWHO) && IsServer(sptr))
from = &his;
else
from = sptr;
/* Note if this is just a refresh of an old topic, and don't
* send it to all the clients to save bandwidth. We still send
* it to other servers as they may have split and lost the topic.
*/
newtopic=ircd_strncmp(chptr->topic,topic,TOPICLEN)!=0;
/* setting a topic */
ircd_strncpy(chptr->topic, topic, TOPICLEN + 1);
if (setter != NULL) {
memset(chptr->topic_nick, 0, NICKLEN + USERLEN + HOSTLEN + 3);
ircd_strncpy(chptr->topic_nick, setter, NICKLEN + USERLEN + HOSTLEN + 3);
nicktok = ircd_strtok(&p, setter, "!");
if (nicktok != NULL)
ircd_strncpy((char *)&nick, nicktok, NICKLEN + 1);
} else {
memset(chptr->topic_nick, 0, NICKLEN + USERLEN + HOSTLEN + 3);
if (feature_bool(FEAT_HOST_IN_TOPIC)) {
ircd_snprintf(0, chptr->topic_nick, NICKLEN + USERLEN + HOSTLEN + 3, "%s!%s@%s",
cli_name(from), cli_user(from)->username, cli_user(from)->host);
} else {
ircd_strncpy(chptr->topic_nick, cli_name(from), NICKLEN + USERLEN + HOSTLEN + 3);
}
ircd_strncpy((char *)&nick, cli_name(from), NICKLEN + 1);
}
chptr->topic_time = ts ? ts : TStime();
/* Fixed in 2.10.11: Don't propagate local topics */
if (!IsLocalChannel(chptr->chname))
{
if (setter != NULL)
sendcmdto_serv_butone(sptr, CMD_TOPIC, cptr, "%H %s %Tu %Tu :%s", chptr,
chptr->topic_nick, chptr->creationtime,
chptr->topic_time, chptr->topic);
else
sendcmdto_serv_butone(sptr, CMD_TOPIC, cptr, "%H %Tu %Tu :%s", chptr,
chptr->creationtime, chptr->topic_time,
chptr->topic);
}
if (newtopic)
{
struct Membership *member;
/* If the member is delayed-join, show them. */
member = find_channel_member(sptr, chptr);
if (member && IsDelayedJoin(member))
RevealDelayedJoin(member);
sendcmdto_channel_butserv_butone(from, CMD_TOPIC, chptr, NULL, 0,
(setter ? "%H :%s (%s)" : "%H :%s%s"),
chptr, chptr->topic, (setter ? nick : ""));
}
/* if this is the same topic as before we send it to the person that
* set it (so they knew it went through ok), but don't bother sending
* it to everyone else on the channel to save bandwidth
*/
else if (MyUser(sptr))
sendcmdto_one(sptr, CMD_TOPIC, sptr, "%H :%s", chptr, chptr->topic);
}
/** Handle a local user's attempt to get or set a channel topic.
*
* \a parv has the following elements:
* \li \a parv[1] is the channel name
* \li \a parv[\a parc - 1] is the topic (if \a parc > 2)
*
* See @ref m_functions for discussion of the arguments.
* @param[in] cptr Client that sent us the message.
* @param[in] sptr Original source of message.
* @param[in] parc Number of arguments.
* @param[in] parv Argument vector.
*/
int m_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *topic = 0, *name, *p = 0;
const char *topicnocolor = 0;
int hascolor = 0;
if (parc < 2)
return need_more_params(sptr, "TOPIC");
if (parc > 2) {
topic = parv[parc - 1];
hascolor = HasColor(topic);
if (hascolor)
topicnocolor = StripColor(topic);
}
for (; (name = ircd_strtok(&p, parv[1], ",")); parv[1] = 0)
{
chptr = 0;
/* Does the channel exist */
if (!IsChannelName(name) || !(chptr = FindChannel(name)))
{
send_reply(sptr,ERR_NOSUCHCHANNEL,name);
continue;
}
/* Trying to check a topic outside a secret channel */
if ((topic || SecretChannel(chptr)) && !find_channel_member(sptr, chptr))
{
send_reply(sptr, ERR_NOTONCHANNEL, chptr->chname);
continue;
}
/* only asking for topic */
if (!topic)
{
if (chptr->topic[0] == '\0')
send_reply(sptr, RPL_NOTOPIC, chptr->chname);
else
{
send_reply(sptr, RPL_TOPIC, chptr->chname, chptr->topic);
send_reply(sptr, RPL_TOPICWHOTIME, chptr->chname, chptr->topic_nick,
chptr->topic_time);
}
continue;
}
else if ((chptr->mode.mode & MODE_TOPICLIMIT) &&
!is_chan_op(sptr, chptr) && !is_half_op(sptr, chptr))
{
send_reply(sptr, ERR_CHANOPRIVSNEEDED, chptr->chname);
continue;
}
else if (!client_can_send_to_channel(sptr, chptr, 1))
{
send_reply(sptr, ERR_CANNOTSENDTOCHAN, chptr->chname);
continue;
}
if (hascolor && (chptr->mode.exmode & EXMODE_NOCOLOR))
{
send_reply(sptr, ERR_CANNOTSENDTOCHAN, chptr->chname);
continue;
}
if (hascolor && (chptr->mode.exmode & EXMODE_STRIPCOLOR))
{
do_settopic(sptr,cptr,chptr,(char*)topicnocolor,0,NULL);
continue;
}
do_settopic(sptr,cptr,chptr,topic,0,NULL);
}
return 0;
}
/** Handle a remote user's attempt to set a channel topic.
* \a parv has the following elements:
* \li \a parv[1] is the channel name
* \li \a parv[\a parc - 4] is the topic setter (optional)
* \li \a parv[\a parc - 3] is the channel creation timestamp (optional)
* \li \a parv[\a parc - 2] is the topic's timestamp (optional)
* \li \a parv[\a parc - 1] is the topic
*
* See @ref m_functions for discussion of the arguments.
* @param[in] cptr Client that sent us the message.
* @param[in] sptr Original source of message.
* @param[in] parc Number of arguments.
* @param[in] parv Argument vector.
*/
int ms_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *topic = 0, *name, *p = 0;
char *setter = NULL;
time_t ts = 0;
if (parc < 3)
return need_more_params(sptr, "TOPIC");
topic = parv[parc - 1];
for (; (name = ircd_strtok(&p, parv[1], ",")); parv[1] = 0)
{
chptr = 0;
/* Does the channel exist */
if (!IsChannelName(name) || !(chptr = FindChannel(name)))
{
send_reply(sptr,ERR_NOSUCHCHANNEL,name);
continue;
}
/* Ignore requests for topics from remote servers */
if (IsLocalChannel(name) && !MyUser(sptr))
{
protocol_violation(sptr,"Topic request");
continue;
}
if (parc > 5)
setter = parv[parc - 4];
/* If existing channel is older or has newer topic, ignore */
if (parc > 4 && (ts = atoi(parv[parc - 3])) && chptr->creationtime < ts)
continue;
ts = 0; /* Default to the current time if no topic_time is passed. */
if (parc > 3 && (ts = atoi(parv[parc - 2])) && chptr->topic_time > ts)
continue;
do_settopic(sptr,cptr,chptr,topic, ts, setter);
}
return 0;
}
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