/*
* 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 1699 2006-07-27 18:37:44Z rubin $
*/
/*
* m_functions execute protocol messages on this server:
*
* cptr is always NON-NULL, pointing to a *LOCAL* client
* structure (with an open socket connected!). This
* identifies the physical socket where the message
* originated (or which caused the m_function to be
* executed--some m_functions may call others...).
*
* sptr is the source of the message, defined by the
* prefix part of the message if present. If not
* or prefix not found, then sptr==cptr.
*
* (!IsServer(cptr)) => (cptr == sptr), because
* prefixes are taken *only* from servers...
*
* (IsServer(cptr))
* (sptr == cptr) => the message didn't
* have the prefix.
*
* (sptr != cptr && IsServer(sptr) means
* the prefix specified servername. (?)
*
* (sptr != cptr && !IsServer(sptr) means
* that message originated from a remote
* user (not local).
*
* combining
*
* (!IsServer(sptr)) means that, sptr can safely
* taken as defining the target structure of the
* message in this server.
*
* *Always* true (if 'parse' and others are working correct):
*
* 1) sptr->from == cptr (note: cptr->from == cptr)
*
* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
* *cannot* be a local connection, unless it's
* actually cptr!). [MyConnect(x) should probably
* be defined as (x == x->from) --msa ]
*
* parc number of variable parameter strings (if zero,
* parv is allowed to be NULL)
*
* parv a NULL terminated list of parameter pointers,
*
* parv[0], sender (prefix string), if not present
* this points to an empty string.
* parv[1]...parv[parc-1]
* pointers to additional parameters
* parv[parc] == NULL, *always*
*
* note: it is guaranteed that parv[0]..parv[parc-1] are all
* non-NULL pointers.
*/
#include "config.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_features.h"
#include "ircd_reply.h"
#include "ircd_string.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "send.h"
#include <assert.h>
#include <stdlib.h>
static void do_settopic(struct Client *sptr, struct Client *cptr,
struct Channel *chptr, char *topic, time_t ts, char *setter)
{
int newtopic;
char *nickb, *nick = NULL;
struct Client *from;
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);
if (setter) {
if (feature_bool(FEAT_HOST_IN_TOPIC)) {
ircd_strncpy(chptr->topic_nick, setter, NICKLEN+USERLEN+HOSTLEN+2);
for (nick = strtok_r(setter, "!", &nickb);
nick;
nick = strtok_r(NULL, "!", &nickb))
{
}
} else
memset(chptr->topic_nick, '\0', NICKLEN+USERLEN+HOSTLEN+3);
ircd_strncpy(chptr->topic_nick, setter, NICKLEN);
} else {
memset(chptr->topic_nick, '\0', NICKLEN+USERLEN+HOSTLEN+3);
ircd_strncpy(chptr->topic_nick, cli_name(from), NICKLEN);
if (feature_bool(FEAT_HOST_IN_TOPIC) && !IsServer(sptr)) {
strcat(chptr->topic_nick, "!");
strcat(chptr->topic_nick, cli_user(from)->username);
strcat(chptr->topic_nick, "@");
strcat(chptr->topic_nick, cli_user(from)->host);
}
}
chptr->topic_time = ts ? ts : TStime();
/* Fixed in 2.10.11: Don't propagate local topics */
if (!IsLocalChannel(chptr->chname))
sendcmdto_serv_butone(sptr, CMD_TOPIC, cptr, "%H %s %Tu %Tu :%s", chptr,
chptr->topic_nick, chptr->creationtime, chptr->topic_time,
chptr->topic);
if (newtopic) {
if (IsServer(sptr))
sendcmdto_channel_butserv_butone(from, CMD_TOPIC, chptr, NULL, 0,
"%H :%s (%s)", chptr, chptr->topic,
setter ? (nick ? nick : setter) : cli_name(from));
else if (IsChannelService(sptr))
sendcmdto_channel_butserv_butone(from, CMD_TOPIC, chptr, NULL, 0,
"%H :%s%s%s%s", chptr, chptr->topic,
setter ? " (" : "",
setter ? setter : "",
setter ? ")" : "");
else
sendcmdto_channel_butserv_butone(from, CMD_TOPIC, chptr, NULL, 0,
"%H :%s", chptr, chptr->topic);
/* 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);
}
/*
* m_topic - generic message handler
*
* parv[0] = sender prefix
* parv[1] = channel
* parv[parc - 1] = topic (if parc > 2)
*/
int m_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *topic = 0, *name, *p = 0, *topicnocolour = 0;
int hascolour = -1;
struct Membership *member;
if (parc < 2)
return need_more_params(sptr, "TOPIC");
if (parc > 2)
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;
}
member = find_channel_member(sptr, chptr);
/* Trying to check a topic outside a secret channel */
if ((topic || SecretChannel(chptr)) && !member)
{
send_reply(sptr, ERR_NOTONCHANNEL, chptr->chname);
continue;
}
if (!topic) /* only asking for 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);
}
}
else {
/* if +t and not @'d, return an error and ignore the topic */
if ((chptr->mode.mode & MODE_TOPICLIMIT) != 0 && !IsChanOp(member)
&& !IsHalfOp(member)) {
send_reply(sptr, ERR_CHANOPRIVSNEEDED, chptr->chname);
continue;
}
/* if chan +m and user not an exception, return error and ignore */
if (!client_can_send_to_channel(sptr, chptr)) {
send_reply(sptr, ERR_CANNOTSENDTOCHAN, chptr->chname, "(Moderated channel (+m))");
continue;
}
if (chptr->mode.mode & MODE_NOCOLOUR) {
if (hascolour == -1) hascolour = HasColour(topic);
if (hascolour) {
send_reply(sptr, ERR_CANNOTSENDTOCHAN, chptr->chname, "(Colors are disallowed (+c))");
continue;
}
}
else if (chptr->mode.mode & MODE_STRIP) {
if (hascolour == -1) hascolour = HasColour(topic);
if (hascolour) {
if (!topicnocolour) topicnocolour = (char*)StripColour(topic);
do_settopic(sptr,cptr,chptr,topicnocolour,0,0);
continue;
}
}
/* (kind of) fallthrough */
do_settopic(sptr,cptr,chptr,topic,0,0);
}
}
return 0;
}
/*
* ms_topic - server message handler
*
* parv[0] = sender prefix
* parv[1] = channel
* parv[parc - 4] = topic setter (optional)
* parv[parc - 3] = channel timestamp (optional)
* parv[parc - 2] = topic timestamp (optional)
* parv[parc - 1] = topic
*/
int ms_topic(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *topic = 0, *name, *p = 0;
int ppoint = 4;
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 existing channel is older, ignore -beware */
if (parc > 5 && (ts = atoi(parv[parc - 3])) && chptr->creationtime < ts)
continue;
if (parc > 4 && (ts = atoi(parv[parc - 2])) && chptr->topic_time > ts)
continue;
if (parv[parc-4]) {
if ('#' == *parv[parc-4])
ppoint = 3;
else if ('#' == *parv[parc-2]) { /* Fall backcode for Nefarious 0.4.0, remove after release */
do_settopic(sptr,cptr,chptr,topic,ts,
IsServer(sptr) ? (feature_bool(FEAT_HIS_BANWHO) ? cli_name(&me) : cli_name(sptr)) : cli_name(sptr));
return 0;
}
}
do_settopic(sptr,cptr,chptr,topic,ts,parv[parc-ppoint]);
}
return 0;
}
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