ircd-hybrid/modules/m_tburst.c

/*  modules/m_tburst.c
 *  Copyright (C) 2002, 2003, 2004, 2005 Hybrid Development Team
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *  1.Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *  2.Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *  3.The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 *  DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 *  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 *  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 *  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 *  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 *
 *  $Id: m_tb.c 122 2005-10-13 10:57:26Z adx $
 */

#include "stdinc.h"
#include "handlers.h"
#include "client.h"
#include "common.h"
#include "ircd.h"
#include "send.h"
#include "msg.h"
#include "modules.h"
#include "hash.h"
#include "s_serv.h"
#include "s_conf.h"

static void ms_tb(struct Client *, struct Client *, int, char *[]);
static void ms_tburst(struct Client *, struct Client *, int, char *[]);
static void set_topic(struct Client *, struct Channel *, time_t,
                      const char *, const char *);

struct Message tburst_msgtab = {
  "TBURST", 0, 0, 6, 0, MFLG_SLOW, 0,
  { m_ignore, m_ignore, ms_tburst, m_ignore, m_ignore, m_ignore }
};

struct Message tb_msgtab = {
  "TB", 0, 0, 0, 0, MFLG_SLOW, 0,
  { m_ignore, m_ignore, ms_tb, m_ignore, m_ignore, m_ignore }
};

INIT_MODULE(m_tburst, "$Revision: 122 $")
{
  mod_add_cmd(&tb_msgtab);
  add_capability("TB", CAP_TB, 1);

  mod_add_cmd(&tburst_msgtab);
  add_capability("TBURST", CAP_TBURST, 1);
}

CLEANUP_MODULE
{
  delete_capability("TBURST");
  mod_del_cmd(&tburst_msgtab);

  delete_capability("TB");
  mod_del_cmd(&tb_msgtab);
}

/* ms_tburst()
 *
 *      parv[0] = sender prefix
 *      parv[1] = channel timestamp
 *      parv[2] = channel
 *      parv[3] = topic timestamp
 *      parv[4] = topic setter
 *      parv[5] = topic
 */
static void
ms_tburst(struct Client *client_p, struct Client *source_p,
          int parc, char *parv[])
{
  struct Channel *chptr = NULL;
  time_t oldchannelts = atol(parv[1]);
  time_t oldtopicts = atol(parv[3]);

  if ((chptr = hash_find_channel(parv[2])) == NULL)
    return;

  /* Only allow topic change if we are the newer TS and server
   * sending TBURST has older TS and topicTS on older TS is
   * newer than current topicTS. -metalrock
   * XXX - Incorrect logic here as discussed on IRC
   */
  if ((oldchannelts <= chptr->channelts) &&
      ((chptr->topic == NULL) || (oldtopicts > chptr->topic_time)))
    set_topic(source_p, chptr, oldtopicts, parv[4], parv[5]);
}

/* ms_tb()
 * 
 *      parv[0] = sender prefix
 *      parv[1] = channel name
 *      parv[2] = topic timestamp
 *      parv[3] = topic setter OR topic itself if parc == 4
 *      parv[4] = topic itself if parc == 5
 */
#define tb_channel      parv[1]
#define tb_topicts_str  parv[2]

static void
ms_tb(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
  struct Channel *chptr;
  time_t tb_topicts = atol(tb_topicts_str);
  char *tb_whoset = NULL;
  char *tb_topic = NULL;

  if ((chptr = hash_find_channel(tb_channel)) == NULL)
    return;

  if (parc == 5)
  {
    tb_whoset = parv[3];
    tb_topic = parv[4];
  }
  else
  {
    tb_whoset = source_p->name;
    tb_topic = parv[3];
  }

  set_topic(source_p, chptr, tb_topicts, tb_whoset, tb_topic);
}

/*
 * set_topic
 *
 * inputs       - source_p pointer
 *              - channel pointer
 *              - topicts to set
 *              - who to set as who doing the topic
 *              - topic
 * output       - none
 * Side effects - simply propagates topic as needed
 * little helper function, could be removed
 */
static void
set_topic(struct Client *source_p, struct Channel *chptr, time_t topicts,
          const char *topicwho, const char *topic)
{
  int new_topic = strcmp(chptr->topic ? chptr->topic : "", topic);

  set_channel_topic(chptr, topic, topicwho, topicts);

  /* Only send TOPIC to channel if it's different */
  if (new_topic)
    sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :%s",
                         ConfigServerHide.hide_servers ? me.name : source_p->name,
                         chptr->chname, chptr->topic == NULL ? "" : chptr->topic);

  sendto_server(source_p, NULL, chptr, CAP_TBURST, NOCAPS,
                ":%s TBURST %lu %s %lu %s :%s",
                me.name, (unsigned long)chptr->channelts, chptr->chname,
                (unsigned long)chptr->topic_time,
                chptr->topic_info == NULL ? "" : chptr->topic_info,
                chptr->topic == NULL ? "" : chptr->topic);
  sendto_server(source_p, NULL, chptr, CAP_TB, CAP_TBURST,
                ":%s TB %s %lu %s :%s",
                me.name, chptr->chname,
                (unsigned long)chptr->topic_time, 
                chptr->topic_info == NULL ? "" : chptr->topic_info,
                chptr->topic == NULL ? "" : chptr->topic);
}
Revision:	442
Committed:	Sat Feb 11 23:14:21 2006 UTC (20 years, 6 months ago) by adx
Content type:	text/x-csrc
File size:	5801 byte(s)
Log Message:	+ massive rewrite of module init/deinit/version headers, we are introducing a new module manager which deals with static and dynamic modules exactly the same way. (New possibilities include loading/unloading statically compiled modules and mixing static/dynamic ones in one build.)
#	User	Rev	Content
1	adx	123	/* modules/m_tburst.c
2			* Copyright (C) 2002, 2003, 2004, 2005 Hybrid Development Team
3			*
4			* Redistribution and use in source and binary forms, with or without
5			* modification, are permitted provided that the following conditions are
6			* met:
7			*
8			* 1.Redistributions of source code must retain the above copyright notice,
9			* this list of conditions and the following disclaimer.
10			* 2.Redistributions in binary form must reproduce the above copyright
11			* notice, this list of conditions and the following disclaimer in the
12			* documentation and/or other materials provided with the distribution.
13			* 3.The name of the author may not be used to endorse or promote products
14			* derived from this software without specific prior written permission.
15			*
16			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17			* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18			* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19			* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
20			* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21			* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
22			* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
24			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
25			* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26			* POSSIBILITY OF SUCH DAMAGE.
27			*
28			* $Id: m_tb.c 122 2005-10-13 10:57:26Z adx $
29			*/
30
31			#include "stdinc.h"
32			#include "handlers.h"
33			#include "client.h"
34			#include "common.h"
35			#include "ircd.h"
36			#include "send.h"
37			#include "msg.h"
38			#include "modules.h"
39			#include "hash.h"
40			#include "s_serv.h"
41			#include "s_conf.h"
42
43			static void ms_tb(struct Client , struct Client , int, char *[]);
44			static void ms_tburst(struct Client , struct Client , int, char *[]);
45	michael	333	static void set_topic(struct Client , struct Channel , time_t,
46			const char , const char );
47	adx	123
48			struct Message tburst_msgtab = {
49			"TBURST", 0, 0, 6, 0, MFLG_SLOW, 0,
50	michael	333	{ m_ignore, m_ignore, ms_tburst, m_ignore, m_ignore, m_ignore }
51	adx	123	};
52
53			struct Message tb_msgtab = {
54			"TB", 0, 0, 0, 0, MFLG_SLOW, 0,
55	michael	333	{ m_ignore, m_ignore, ms_tb, m_ignore, m_ignore, m_ignore }
56	adx	123	};
57
58	adx	442	INIT_MODULE(m_tburst, "$Revision: 122 $")
59	adx	123	{
60			mod_add_cmd(&tb_msgtab);
61			add_capability("TB", CAP_TB, 1);
62
63			mod_add_cmd(&tburst_msgtab);
64			add_capability("TBURST", CAP_TBURST, 1);
65			}
66
67	adx	442	CLEANUP_MODULE
68	adx	123	{
69	adx	442	delete_capability("TBURST");
70			mod_del_cmd(&tburst_msgtab);
71
72			delete_capability("TB");
73	adx	123	mod_del_cmd(&tb_msgtab);
74			}
75
76			/* ms_tburst()
77			*
78			* parv[0] = sender prefix
79			* parv[1] = channel timestamp
80			* parv[2] = channel
81			* parv[3] = topic timestamp
82			* parv[4] = topic setter
83			* parv[5] = topic
84			*/
85			static void
86			ms_tburst(struct Client client_p, struct Client source_p,
87			int parc, char *parv[])
88			{
89			struct Channel *chptr = NULL;
90			time_t oldchannelts = atol(parv[1]);
91			time_t oldtopicts = atol(parv[3]);
92
93			if ((chptr = hash_find_channel(parv[2])) == NULL)
94			return;
95
96			/* Only allow topic change if we are the newer TS and server
97			* sending TBURST has older TS and topicTS on older TS is
98			* newer than current topicTS. -metalrock
99			* XXX - Incorrect logic here as discussed on IRC
100			*/
101			if ((oldchannelts <= chptr->channelts) &&
102			((chptr->topic == NULL) \|\| (oldtopicts > chptr->topic_time)))
103			set_topic(source_p, chptr, oldtopicts, parv[4], parv[5]);
104			}
105
106			/* ms_tb()
107			*
108			* parv[0] = sender prefix
109			* parv[1] = channel name
110			* parv[2] = topic timestamp
111			* parv[3] = topic setter OR topic itself if parc == 4
112			* parv[4] = topic itself if parc == 5
113			*/
114			#define tb_channel parv[1]
115			#define tb_topicts_str parv[2]
116
117			static void
118			ms_tb(struct Client client_p, struct Client source_p, int parc, char *parv[])
119			{
120			struct Channel *chptr;
121			time_t tb_topicts = atol(tb_topicts_str);
122			char *tb_whoset = NULL;
123			char *tb_topic = NULL;
124
125			if ((chptr = hash_find_channel(tb_channel)) == NULL)
126			return;
127
128			if (parc == 5)
129			{
130			tb_whoset = parv[3];
131			tb_topic = parv[4];
132			}
133			else
134			{
135			tb_whoset = source_p->name;
136			tb_topic = parv[3];
137			}
138
139			set_topic(source_p, chptr, tb_topicts, tb_whoset, tb_topic);
140			}
141
142			/*
143			* set_topic
144			*
145			* inputs - source_p pointer
146			* - channel pointer
147			* - topicts to set
148			* - who to set as who doing the topic
149			* - topic
150			* output - none
151			* Side effects - simply propagates topic as needed
152			* little helper function, could be removed
153			*/
154			static void
155	michael	333	set_topic(struct Client source_p, struct Channel chptr, time_t topicts,
156			const char topicwho, const char topic)
157	adx	123	{
158	michael	334	int new_topic = strcmp(chptr->topic ? chptr->topic : "", topic);
159	michael	333
160	adx	123	set_channel_topic(chptr, topic, topicwho, topicts);
161
162	michael	333	/* Only send TOPIC to channel if it's different */
163			if (new_topic)
164	adx	123	sendto_channel_local(ALL_MEMBERS, NO, chptr, ":%s TOPIC %s :%s",
165			ConfigServerHide.hide_servers ? me.name : source_p->name,
166			chptr->chname, chptr->topic == NULL ? "" : chptr->topic);
167
168	michael	405	sendto_server(source_p, NULL, chptr, CAP_TBURST, NOCAPS,
169	adx	123	":%s TBURST %lu %s %lu %s :%s",
170			me.name, (unsigned long)chptr->channelts, chptr->chname,
171			(unsigned long)chptr->topic_time,
172			chptr->topic_info == NULL ? "" : chptr->topic_info,
173			chptr->topic == NULL ? "" : chptr->topic);
174	michael	405	sendto_server(source_p, NULL, chptr, CAP_TB, CAP_TBURST,
175	adx	123	":%s TB %s %lu %s :%s",
176			me.name, chptr->chname,
177			(unsigned long)chptr->topic_time,
178			chptr->topic_info == NULL ? "" : chptr->topic_info,
179			chptr->topic == NULL ? "" : chptr->topic);
180			}