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/* modules/m_tburst.c |
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* Copyright (C) 2002, 2003, 2004, 2005 Hybrid Development Team |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* 1.Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* 2.Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3.The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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* $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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#include "handlers.h" |
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#include "client.h" |
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#include "common.h" |
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#include "ircd.h" |
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#include "send.h" |
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#include "msg.h" |
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#include "modules.h" |
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#include "hash.h" |
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#include "s_serv.h" |
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#include "s_conf.h" |
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|
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static void ms_tb(struct Client *, struct Client *, int, char *[]); |
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static void ms_tburst(struct Client *, struct Client *, int, char *[]); |
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static void set_topic(struct Client *, struct Channel *, time_t, |
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const char *, const char *); |
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|
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struct Message tburst_msgtab = { |
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"TBURST", 0, 0, 5, 0, MFLG_SLOW, 0, |
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{ m_ignore, m_ignore, ms_tburst, m_ignore, m_ignore, m_ignore } |
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}; |
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|
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struct Message tb_msgtab = { |
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"TB", 0, 0, 4, 0, MFLG_SLOW, 0, |
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{ m_ignore, m_ignore, ms_tb, m_ignore, m_ignore, m_ignore } |
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}; |
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|
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#ifndef STATIC_MODULES |
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|
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void |
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_modinit(void) |
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{ |
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mod_add_cmd(&tb_msgtab); |
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add_capability("TB", CAP_TB, 1); |
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|
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mod_add_cmd(&tburst_msgtab); |
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add_capability("TBURST", CAP_TBURST, 1); |
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} |
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|
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void |
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_moddeinit(void) |
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{ |
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mod_del_cmd(&tb_msgtab); |
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delete_capability("TB"); |
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|
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mod_del_cmd(&tburst_msgtab); |
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delete_capability("TBURST"); |
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} |
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|
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const char *_version = "$Revision: 122 $"; |
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|
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#endif /* !STATIC_MODULES */ |
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|
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/* ms_tburst() |
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* |
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* parv[0] = sender prefix |
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* parv[1] = channel timestamp |
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* parv[2] = channel |
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* parv[3] = topic timestamp |
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* parv[4] = topic setter |
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* parv[5] = topic |
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*/ |
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static void |
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ms_tburst(struct Client *client_p, struct Client *source_p, |
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int parc, char *parv[]) |
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{ |
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struct Channel *chptr = NULL; |
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int accept_remote = 0; |
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time_t remote_channel_ts = atol(parv[1]); |
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time_t remote_topic_ts = atol(parv[3]); |
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const char *topic = ""; |
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const char *setby = ""; |
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|
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/* |
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* Do NOT test parv[5] for an empty string and return if true! |
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* parv[5] CAN be an empty string, i.e. if the other side wants |
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* to unset our topic. Don't forget: an empty topic is also a |
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* valid topic. |
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*/ |
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|
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|
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if ((chptr = hash_find_channel(parv[2])) == NULL) |
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return; |
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|
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if (parc == 6) |
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{ |
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topic = parv[5]; |
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setby = parv[4]; |
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} |
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|
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/* |
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* The logic for accepting and rejecting channel topics was |
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* always a bit hairy, so now we got exactly 2 cases where |
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* we would accept a bursted topic |
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* |
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* Case 1: |
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* The TS of the remote channel is older than ours |
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* Case 2: |
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* The TS of the remote channel is equal to ours AND |
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* the TS of the remote topic is newer than ours |
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*/ |
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if (remote_channel_ts < chptr->channelts) |
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accept_remote = 1; |
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else if (remote_channel_ts == chptr->channelts) |
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if (remote_topic_ts > chptr->topic_time) |
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accept_remote = 1; |
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|
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if (accept_remote) |
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{ |
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int topic_differs = strcmp(chptr->topic ? chptr->topic : "", topic); |
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|
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set_channel_topic(chptr, topic, setby, remote_topic_ts); |
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|
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if (topic_differs) |
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sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :%s", |
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ConfigServerHide.hide_servers ? me.name : source_p->name, |
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chptr->chname, chptr->topic == NULL ? "" : chptr->topic); |
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} |
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|
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/* |
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* Always propagate what we have received, not only if we accept the topic. |
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* This will keep other servers in sync. |
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*/ |
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sendto_server(source_p, NULL, chptr, CAP_TBURST, NOCAPS, NOFLAGS, |
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":%s TBURST %s %s %s %s :%s", |
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source_p->name, parv[1], parv[2], parv[3], setby, topic); |
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if (parc > 5 && *topic != '\0') /* unsetting a topic is not supported by TB */ |
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sendto_server(source_p, NULL, chptr, CAP_TB, CAP_TBURST, NOFLAGS, |
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":%s TB %s %s %s :%s", |
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source_p->name, parv[1], parv[2], setby, topic); |
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} |
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|
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/* ms_tb() |
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* |
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* parv[0] = sender prefix |
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* parv[1] = channel name |
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* parv[2] = topic timestamp |
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* parv[3] = topic setter OR topic itself if parc == 4 |
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* parv[4] = topic itself if parc == 5 |
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*/ |
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#define tb_channel parv[1] |
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#define tb_topicts_str parv[2] |
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|
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static void |
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ms_tb(struct Client *client_p, struct Client *source_p, int parc, char *parv[]) |
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{ |
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struct Channel *chptr; |
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time_t tb_topicts = atol(tb_topicts_str); |
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char *tb_whoset = NULL; |
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char *tb_topic = NULL; |
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|
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if ((chptr = hash_find_channel(tb_channel)) == NULL) |
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return; |
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|
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if (parc == 5) |
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{ |
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tb_whoset = parv[3]; |
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tb_topic = parv[4]; |
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} |
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else |
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{ |
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tb_whoset = source_p->name; |
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tb_topic = parv[3]; |
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} |
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|
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set_topic(source_p, chptr, tb_topicts, tb_whoset, tb_topic); |
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} |
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|
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/* |
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* set_topic |
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* |
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* inputs - source_p pointer |
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* - channel pointer |
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* - topicts to set |
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* - who to set as who doing the topic |
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* - topic |
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* output - none |
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* Side effects - simply propagates topic as needed |
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* little helper function, could be removed |
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*/ |
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static void |
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set_topic(struct Client *source_p, struct Channel *chptr, time_t topicts, |
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const char *topicwho, const char *topic) |
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{ |
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int new_topic = strcmp(chptr->topic ? chptr->topic : "", topic); |
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|
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set_channel_topic(chptr, topic, topicwho, topicts); |
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|
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/* Only send TOPIC to channel if it's different */ |
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if (new_topic) |
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sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :%s", |
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ConfigServerHide.hide_servers ? me.name : source_p->name, |
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chptr->chname, chptr->topic == NULL ? "" : chptr->topic); |
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|
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sendto_server(source_p, NULL, chptr, CAP_TBURST, NOCAPS, NOFLAGS, |
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":%s TBURST %lu %s %lu %s :%s", |
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me.name, (unsigned long)chptr->channelts, chptr->chname, |
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(unsigned long)chptr->topic_time, |
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chptr->topic_info == NULL ? "" : chptr->topic_info, |
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chptr->topic == NULL ? "" : chptr->topic); |
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sendto_server(source_p, NULL, chptr, CAP_TB, CAP_TBURST, NOFLAGS, |
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":%s TB %s %lu %s :%s", |
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me.name, chptr->chname, |
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(unsigned long)chptr->topic_time, |
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chptr->topic_info == NULL ? "" : chptr->topic_info, |
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chptr->topic == NULL ? "" : chptr->topic); |
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} |