trunk/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.
 *
 *  $Id$
 */

#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "send.h"
#include "modules.h"
#include "hash.h"
#include "s_serv.h"
#include "conf.h"
#include "parse.h"


/* 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;
  int accept_remote = 0;
  time_t remote_channel_ts = atol(parv[1]);
  time_t remote_topic_ts = atol(parv[3]);
  const char *topic = parv[5];
  const char *setby = parv[4];

  /*
   * Do NOT test parv[5] for an empty string and return if true!
   * parv[5] CAN be an empty string, i.e. if the other side wants
   * to unset our topic.  Don't forget: an empty topic is also a
   * valid topic.
   */


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

  /*
   * The logic for accepting and rejecting channel topics was
   * always a bit hairy, so now we got exactly 2 cases where
   * we would accept a bursted topic
   *
   * Case 1:
   *        The TS of the remote channel is older than ours
   * Case 2:
   *        The TS of the remote channel is equal to ours AND
   *        the TS of the remote topic is newer than ours
   */
  if (HasFlag(source_p, FLAGS_SERVICE))
    accept_remote = 1;
  else if (remote_channel_ts < chptr->channelts)
    accept_remote = 1;
  else if (remote_channel_ts == chptr->channelts)
    if (remote_topic_ts > chptr->topic_time)
      accept_remote = 1;

  if (accept_remote)
  {
    int topic_differs = strncmp(chptr->topic, topic, sizeof(chptr->topic) - 1);
    int hidden_server = (ConfigServerHide.hide_servers || IsHidden(source_p));

    set_channel_topic(chptr, topic, setby, remote_topic_ts, !!MyClient(source_p));

    sendto_server(source_p, CAP_TBURST|CAP_TS6, NOCAPS,
                  ":%s TBURST %s %s %s %s :%s",
                  ID(source_p), parv[1], parv[2], parv[3], setby, topic);
    sendto_server(source_p, CAP_TBURST, CAP_TS6,
                  ":%s TBURST %s %s %s %s :%s",
                  source_p->name, parv[1], parv[2], parv[3], setby, topic);

    if (topic_differs)
      sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :%s",
                           hidden_server ? me.name : source_p->name,
                           chptr->chname, chptr->topic);
  }
}

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

static void
module_init(void)
{
  mod_add_cmd(&tburst_msgtab);
  add_capability("TBURST", CAP_TBURST, 1);
}

static void
module_exit(void)
{
  mod_del_cmd(&tburst_msgtab);
  delete_capability("TBURST");
}

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1751
Committed:	Wed Jan 16 18:30:52 2013 UTC (12 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	4558 byte(s)
Log Message:	- Forward-port -r1750 [IMPORTANT: nick and topic lengths are now configurable via ircd.conf. A max_nick_length, as well as a max_topic_length configuration option can now be found in the serverinfo{} block] - OpenSSL 0.9.8s and higher is now required in order to enable ssl support
#	Content
1	/* 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	* $Id$
29	*/
30
31	#include "stdinc.h"
32	#include "client.h"
33	#include "ircd.h"
34	#include "send.h"
35	#include "modules.h"
36	#include "hash.h"
37	#include "s_serv.h"
38	#include "conf.h"
39	#include "parse.h"
40
41
42	/* ms_tburst()
43	*
44	* parv[0] = sender prefix
45	* parv[1] = channel timestamp
46	* parv[2] = channel
47	* parv[3] = topic timestamp
48	* parv[4] = topic setter
49	* parv[5] = topic
50	*/
51	static void
52	ms_tburst(struct Client client_p, struct Client source_p,
53	int parc, char *parv[])
54	{
55	struct Channel *chptr = NULL;
56	int accept_remote = 0;
57	time_t remote_channel_ts = atol(parv[1]);
58	time_t remote_topic_ts = atol(parv[3]);
59	const char *topic = parv[5];
60	const char *setby = parv[4];
61
62	/*
63	* Do NOT test parv[5] for an empty string and return if true!
64	* parv[5] CAN be an empty string, i.e. if the other side wants
65	* to unset our topic. Don't forget: an empty topic is also a
66	* valid topic.
67	*/
68
69
70	if ((chptr = hash_find_channel(parv[2])) == NULL)
71	return;
72
73	/*
74	* The logic for accepting and rejecting channel topics was
75	* always a bit hairy, so now we got exactly 2 cases where
76	* we would accept a bursted topic
77	*
78	* Case 1:
79	* The TS of the remote channel is older than ours
80	* Case 2:
81	* The TS of the remote channel is equal to ours AND
82	* the TS of the remote topic is newer than ours
83	*/
84	if (HasFlag(source_p, FLAGS_SERVICE))
85	accept_remote = 1;
86	else if (remote_channel_ts < chptr->channelts)
87	accept_remote = 1;
88	else if (remote_channel_ts == chptr->channelts)
89	if (remote_topic_ts > chptr->topic_time)
90	accept_remote = 1;
91
92	if (accept_remote)
93	{
94	int topic_differs = strncmp(chptr->topic, topic, sizeof(chptr->topic) - 1);
95	int hidden_server = (ConfigServerHide.hide_servers \|\| IsHidden(source_p));
96
97	set_channel_topic(chptr, topic, setby, remote_topic_ts, !!MyClient(source_p));
98
99	sendto_server(source_p, CAP_TBURST\|CAP_TS6, NOCAPS,
100	":%s TBURST %s %s %s %s :%s",
101	ID(source_p), parv[1], parv[2], parv[3], setby, topic);
102	sendto_server(source_p, CAP_TBURST, CAP_TS6,
103	":%s TBURST %s %s %s %s :%s",
104	source_p->name, parv[1], parv[2], parv[3], setby, topic);
105
106	if (topic_differs)
107	sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :%s",
108	hidden_server ? me.name : source_p->name,
109	chptr->chname, chptr->topic);
110	}
111	}
112
113	static struct Message tburst_msgtab = {
114	"TBURST", 0, 0, 6, MAXPARA, MFLG_SLOW, 0,
115	{ m_ignore, m_ignore, ms_tburst, m_ignore, m_ignore, m_ignore }
116	};
117
118	static void
119	module_init(void)
120	{
121	mod_add_cmd(&tburst_msgtab);
122	add_capability("TBURST", CAP_TBURST, 1);
123	}
124
125	static void
126	module_exit(void)
127	{
128	mod_del_cmd(&tburst_msgtab);
129	delete_capability("TBURST");
130	}
131
132	struct module module_entry = {
133	.node = { NULL, NULL, NULL },
134	.name = NULL,
135	.version = "$Revision$",
136	.handle = NULL,
137	.modinit = module_init,
138	.modexit = module_exit,
139	.flags = 0
140	};