summaryrefslogtreecommitdiff
path: root/src/modules/m_spanningtree/ijoin.cpp
blob: 78e05db93fbb841090e5c18257bcdf9ecd42a2f7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2012-2013 Attila Molnar <attilamolnar@hush.com>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "inspircd.h"
#include "commands.h"
#include "utils.h"
#include "treeserver.h"
#include "treesocket.h"

CmdResult CommandIJoin::HandleRemote(RemoteUser* user, std::vector<std::string>& params)
{
	Channel* chan = ServerInstance->FindChan(params[0]);
	if (!chan)
	{
		// Desync detected, recover
		// Ignore the join and send RESYNC, this will result in the remote server sending all channel data to us
		ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Received IJOIN for non-existant channel: " + params[0]);

		CmdBuilder("RESYNC").push(params[0]).Unicast(user);

		return CMD_FAILURE;
	}

	bool apply_modes;
	if (params.size() > 2)
	{
		time_t RemoteTS = ServerCommand::ExtractTS(params[2]);
		if (RemoteTS < chan->age)
			throw ProtocolException("Attempted to lower TS via IJOIN. LocalTS=" + ConvToStr(chan->age));
		apply_modes = ((params.size() > 3) && (RemoteTS == chan->age));
	}
	else
		apply_modes = false;

	// Join the user and set the membership id to what they sent
	Membership* memb = chan->ForceJoin(user, apply_modes ? &params[3] : NULL);
	if (!memb)
		return CMD_FAILURE;

	memb->id = Membership::IdFromString(params[1]);
	return CMD_SUCCESS;
}

CmdResult CommandResync::HandleServer(TreeServer* server, std::vector<std::string>& params)
{
	ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Resyncing " + params[0]);
	Channel* chan = ServerInstance->FindChan(params[0]);
	if (!chan)
	{
		// This can happen for a number of reasons, safe to ignore
		ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Channel does not exist");
		return CMD_FAILURE;
	}

	if (!server->IsLocal())
		throw ProtocolException("RESYNC from a server that is not directly connected");

	// Send all known information about the channel
	server->GetSocket()->SyncChannel(chan);
	return CMD_SUCCESS;
}