mirror of https://github.com/pissnet/pissircd.git
325 lines
8.9 KiB
C
325 lines
8.9 KiB
C
/*
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* IRC - Internet Relay Chat, src/modules/topic.c
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* (C) 2004-present The UnrealIRCd Team
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*
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* See file AUTHORS in IRC package for additional names of
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* the programmers.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 1, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "unrealircd.h"
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CMD_FUNC(cmd_topic);
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#define MSG_TOPIC "TOPIC"
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ModuleHeader MOD_HEADER
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= {
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"topic",
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"5.0",
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"command /topic",
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"UnrealIRCd Team",
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"unrealircd-6",
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};
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/* Forward declarations */
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void _set_channel_topic(Client *client, Channel *channel, MessageTag *recv_mtags, const char *topic, const char *set_by, time_t set_at);
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MOD_TEST()
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{
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MARK_AS_OFFICIAL_MODULE(modinfo);
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EfunctionAddVoid(modinfo->handle, EFUNC_SET_CHANNEL_TOPIC, _set_channel_topic);
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return MOD_SUCCESS;
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}
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MOD_INIT()
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{
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CommandAdd(modinfo->handle, MSG_TOPIC, cmd_topic, 4, CMD_USER|CMD_SERVER);
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MARK_AS_OFFICIAL_MODULE(modinfo);
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return MOD_SUCCESS;
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}
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MOD_LOAD()
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{
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return MOD_SUCCESS;
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}
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MOD_UNLOAD()
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{
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return MOD_SUCCESS;
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}
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void topic_operoverride_msg(Client *client, Channel *channel, const char *topic)
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{
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unreal_log(ULOG_INFO, "operoverride", "OPEROVERRIDE_TOPIC", client,
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"OperOverride: $client.details changed the topic of $channel to '$topic'",
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log_data_string("override_type", "topic"),
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log_data_string("topic", topic),
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log_data_channel("channel", channel));
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}
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/** Query or change the channel topic.
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*
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* Syntax for clients:
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* parv[1] = channel
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* parv[2] = new topic
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*
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* Syntax for server to server traffic:
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* parv[1] = channel name
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* parv[2] = topic nickname
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* parv[3] = topic time
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* parv[4] = topic text
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*/
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CMD_FUNC(cmd_topic)
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{
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Channel *channel = NULL;
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const char *topic = NULL;
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const char *name, *tnick = client->name;
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const char *errmsg = NULL;
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char topicbuf[MAXTOPICLEN+1];
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time_t ttime = 0;
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int i = 0;
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Hook *h;
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MessageTag *mtags = NULL;
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if ((parc < 2) || BadPtr(parv[1]))
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{
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sendnumeric(client, ERR_NEEDMOREPARAMS, "TOPIC");
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return;
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}
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name = parv[1];
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channel = find_channel(parv[1]);
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if (!channel)
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{
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sendnumeric(client, ERR_NOSUCHCHANNEL, name);
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return;
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}
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if (parc > 2 || SecretChannel(channel))
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{
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if (!IsMember(client, channel) && !IsServer(client)
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&& !ValidatePermissionsForPath("channel:see:list:secret",client,NULL,channel,NULL) && !IsULine(client))
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{
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sendnumeric(client, ERR_NOTONCHANNEL, name);
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return;
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}
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if (parc > 2)
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topic = parv[2];
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}
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if (parc > 4)
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{
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if (MyUser(client))
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{
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sendnumeric(client, ERR_CANNOTDOCOMMAND, "TOPIC", "Invalid parameters. Usage is TOPIC #channel :topic here");
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return;
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}
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tnick = parv[2];
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ttime = atol(parv[3]);
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topic = parv[4];
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}
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/* Only asking for the topic */
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if (!topic)
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{
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if (IsServer(client))
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return; /* Servers must maintain state, not ask */
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for (h = Hooks[HOOKTYPE_VIEW_TOPIC_OUTSIDE_CHANNEL]; h; h = h->next)
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{
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i = (*(h->func.intfunc))(client,channel);
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if (i != HOOK_CONTINUE)
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break;
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}
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/* If you're not a member, and you can't view outside channel, deny */
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if ((!IsMember(client, channel) && i == HOOK_DENY) ||
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(is_banned(client,channel,BANCHK_JOIN,NULL,NULL) &&
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!ValidatePermissionsForPath("channel:see:topic",client,NULL,channel,NULL)))
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{
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sendnumeric(client, ERR_NOTONCHANNEL, name);
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return;
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}
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if (!channel->topic)
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sendnumeric(client, RPL_NOTOPIC, channel->name);
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else
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{
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sendnumeric(client, RPL_TOPIC, channel->name, channel->topic);
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sendnumeric(client, RPL_TOPICWHOTIME, channel->name,
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channel->topic_nick, (long long)channel->topic_time);
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}
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return;
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}
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/* Cut topic here, because we are in BIGLINES code */
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strlcpy(topicbuf, topic, sizeof(topicbuf));
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topic = topicbuf;
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if (ttime && topic && (IsServer(client) || IsULine(client)))
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{
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if (!channel->topic_time || ttime > channel->topic_time || IsULine(client))
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/* The IsUline is to allow services to use an old TS. Apparently
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* some services do this in their topic enforcement -- codemastr
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*/
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{
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/* Set the topic */
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safe_strldup(channel->topic, topic, iConf.topic_length+1);
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safe_strldup(channel->topic_nick, tnick, NICKLEN+USERLEN+HOSTLEN+5);
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channel->topic_time = ttime;
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new_message(client, recv_mtags, &mtags);
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RunHook(HOOKTYPE_TOPIC, client, channel, mtags, channel->topic);
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sendto_server(client, 0, 0, mtags, ":%s TOPIC %s %s %lld :%s",
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client->id, channel->name, channel->topic_nick,
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(long long)channel->topic_time, channel->topic);
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sendto_channel(channel, client, NULL, 0, 0, SEND_LOCAL, mtags,
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":%s TOPIC %s :%s",
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client->name, channel->name, channel->topic);
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free_message_tags(mtags);
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}
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return;
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}
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/* Topic change. Either locally (check permissions!) or remote, check permissions: */
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if (IsUser(client))
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{
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const char *newtopic = NULL;
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const char *errmsg = NULL;
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int ret = EX_ALLOW;
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int operoverride = 0;
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for (h = Hooks[HOOKTYPE_CAN_SET_TOPIC]; h; h = h->next)
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{
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int n = (*(h->func.intfunc))(client, channel, topic, &errmsg);
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if (n == EX_DENY)
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{
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ret = n;
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} else
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if (n == EX_ALWAYS_DENY)
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{
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ret = n;
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break;
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}
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}
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if (ret == EX_ALWAYS_DENY)
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{
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if (MyUser(client) && errmsg)
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sendto_one(client, NULL, "%s", errmsg); /* send error, if any */
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if (MyUser(client))
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return; /* reject the topic set (note: we never block remote sets) */
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}
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if (ret == EX_DENY)
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{
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if (MyUser(client) && !ValidatePermissionsForPath("channel:override:topic", client, NULL, channel, NULL))
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{
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if (errmsg)
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sendto_one(client, NULL, "%s", errmsg);
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return; /* reject */
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} else {
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operoverride = 1; /* allow */
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}
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}
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/* banned? */
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newtopic = topic;
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if (!check_channel_access(client, channel, "hoaq") && is_banned(client, channel, BANCHK_MSG, &newtopic, &errmsg))
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{
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char buf[512];
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if (MyUser(client) && !ValidatePermissionsForPath("channel:override:topic", client, NULL, channel, NULL))
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{
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ircsnprintf(buf, sizeof(buf), "You cannot change the topic on %s while being banned", channel->name);
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sendnumeric(client, ERR_CANNOTDOCOMMAND, "TOPIC", buf);
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return;
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}
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operoverride = 1;
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}
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if (MyUser(client) && newtopic)
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topic = newtopic; /* process is_banned() changes of topic (eg: text replacement), but only for local clients */
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if (operoverride)
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topic_operoverride_msg(client, channel, topic);
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/* For local users, run spamfilters and hooks.. */
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if (MyUser(client))
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{
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Hook *tmphook;
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int n;
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if (match_spamfilter(client, topic, SPAMF_TOPIC, "TOPIC", channel->name, 0, NULL))
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return;
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for (tmphook = Hooks[HOOKTYPE_PRE_LOCAL_TOPIC]; tmphook; tmphook = tmphook->next) {
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topic = (*(tmphook->func.stringfunc))(client, channel, topic);
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if (!topic)
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return;
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}
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}
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/* At this point 'tnick' is set to client->name.
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* If set::topic-setter nick-user-host; is set
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* then we update it here to nick!user@host.
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*/
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if (iConf.topic_setter == SETTER_NICK_USER_HOST)
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tnick = make_nick_user_host(client->name, client->user->username, GetHost(client));
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}
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_set_channel_topic(client, channel, recv_mtags, topic, tnick, ttime);
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}
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/** Set topic on a channel.
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* @param client The client setting the topic
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* @param channel The channel
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* @param recv_mtags Message tags
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* @param topic The new topic (TODO: this function does not support unsetting yet)
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* @param set_by Who set the topic (can be NULL, means client->name)
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* @param set_at When the topic was set (can be 0, means now)
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*/
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void _set_channel_topic(Client *client, Channel *channel, MessageTag *recv_mtags, const char *topic, const char *set_by, time_t set_at)
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{
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MessageTag *mtags = NULL;
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/* Set default values when needed */
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if (set_by == NULL)
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set_by = client->name;
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if (set_at == 0)
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set_at = TStime();
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/* Set the topic */
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safe_strldup(channel->topic, topic, iConf.topic_length+1);
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safe_strldup(channel->topic_nick, set_by, NICKLEN+USERLEN+HOSTLEN+5);
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channel->topic_time = set_at;
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/* And broadcast the change - locally and remote */
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new_message(client, recv_mtags, &mtags);
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RunHook(HOOKTYPE_TOPIC, client, channel, mtags, topic);
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sendto_server(client, 0, 0, mtags, ":%s TOPIC %s %s %lld :%s",
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client->id, channel->name, channel->topic_nick,
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(long long)channel->topic_time, channel->topic);
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sendto_channel(channel, client, NULL, 0, 0, SEND_LOCAL, mtags,
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":%s TOPIC %s :%s",
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client->name, channel->name, channel->topic);
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free_message_tags(mtags);
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}
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