/[svn]/ircd-hybrid-8/modules/m_tburst.c
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Contents of /ircd-hybrid-8/modules/m_tburst.c

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Revision 1472 - (show annotations)
Sun Jul 22 12:03:18 2012 UTC (8 years ago) by michael
File MIME type: text/x-chdr
File size: 4570 byte(s)
- remove CAP_TB
- add proper TS6 support to TBURST

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 = "";
60 const char *setby = "";
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 if (parc == 6)
74 {
75 topic = parv[5];
76 setby = parv[4];
77 }
78
79 /*
80 * The logic for accepting and rejecting channel topics was
81 * always a bit hairy, so now we got exactly 2 cases where
82 * we would accept a bursted topic
83 *
84 * Case 1:
85 * The TS of the remote channel is older than ours
86 * Case 2:
87 * The TS of the remote channel is equal to ours AND
88 * the TS of the remote topic is newer than ours
89 */
90 if (remote_channel_ts < chptr->channelts)
91 accept_remote = 1;
92 else if (remote_channel_ts == chptr->channelts)
93 if (remote_topic_ts > chptr->topic_time)
94 accept_remote = 1;
95
96 if (accept_remote)
97 {
98 int topic_differs = strcmp(chptr->topic, topic);
99
100 set_channel_topic(chptr, topic, setby, remote_topic_ts);
101
102 if (topic_differs)
103 sendto_channel_local(ALL_MEMBERS, 0, chptr, ":%s TOPIC %s :%s",
104 ConfigServerHide.hide_servers ? me.name : source_p->name,
105 chptr->chname, chptr->topic);
106 }
107
108 /*
109 * Always propagate what we have received, not only if we accept the topic.
110 * This will keep other servers in sync.
111 */
112 sendto_server(source_p, chptr, CAP_TBURST|CAP_TS6, NOCAPS,
113 ":%s TBURST %s %s %s %s :%s",
114 ID(source_p), parv[1], parv[2], parv[3], setby, topic);
115 sendto_server(source_p, chptr, CAP_TBURST, CAP_TS6,
116 ":%s TBURST %s %s %s %s :%s",
117 source_p->name, parv[1], parv[2], parv[3], setby, topic);
118 }
119
120 static struct Message tburst_msgtab = {
121 "TBURST", 0, 0, 5, MAXPARA, MFLG_SLOW, 0,
122 { m_ignore, m_ignore, ms_tburst, m_ignore, m_ignore, m_ignore }
123 };
124
125 static void
126 module_init(void)
127 {
128 mod_add_cmd(&tburst_msgtab);
129 add_capability("TBURST", CAP_TBURST, 1);
130 }
131
132 static void
133 module_exit(void)
134 {
135 mod_del_cmd(&tburst_msgtab);
136 delete_capability("TBURST");
137 }
138
139 struct module module_entry = {
140 .node = { NULL, NULL, NULL },
141 .name = NULL,
142 .version = "$Revision$",
143 .handle = NULL,
144 .modinit = module_init,
145 .modexit = module_exit,
146 .flags = 0
147 };

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