summaryrefslogtreecommitdiff
path: root/src/modules/m_spanningtree/compat.cpp
blob: 30b7ba8bb61160f4727cfa852227a84b8fbc042a (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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
 *
 * 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 "main.h"
#include "treesocket.h"

static std::string newline("\n");

void TreeSocket::WriteLine(std::string line)
{
	if (LinkState == CONNECTED)
	{
		if (line[0] != ':')
		{
			ServerInstance->Logs->Log("m_spanningtree", LOG_DEFAULT, "Sending line without server prefix!");
			line = ":" + ServerInstance->Config->GetSID() + " " + line;
		}
		if (proto_version != ProtocolVersion)
		{
			std::string::size_type a = line.find(' ');
			std::string::size_type b = line.find(' ', a + 1);
			std::string command = line.substr(a + 1, b-a-1);
			// now try to find a translation entry
			// TODO a more efficient lookup method will be needed later
			if (proto_version < 1205)
			{
				if (command == "IJOIN")
				{
					// Convert
					// :<uid> IJOIN <chan> [<ts> [<flags>]]
					// to
					// :<sid> FJOIN <chan> <ts> + [<flags>],<uuid>
					std::string::size_type c = line.find(' ', b + 1);
					if (c == std::string::npos)
					{
						// No TS or modes in the command
						// :22DAAAAAB IJOIN #chan
						const std::string channame = line.substr(b+1, c-b-1);
						Channel* chan = ServerInstance->FindChan(channame);
						if (!chan)
							return;

						line.push_back(' ');
						line.append(ConvToStr(chan->age));
						line.append(" + ,");
					}
					else
					{
						std::string::size_type d = line.find(' ', c + 1);
						if (d == std::string::npos)
						{
							// TS present, no modes
							// :22DAAAAAC IJOIN #chan 12345
							line.append(" + ,");
						}
						else
						{
							// Both TS and modes are present
							// :22DAAAAAC IJOIN #chan 12345 ov
							std::string::size_type e = line.find(' ', d + 1);
							if (e != std::string::npos)
								line.erase(e);

							line.insert(d, " +");
							line.push_back(',');
						}
					}

					// Move the uuid to the end and replace the I with an F
					line.append(line.substr(1, 9));
					line.erase(4, 6);
					line[5] = 'F';
				}
				else if (command == "RESYNC")
					return;
				else if (command == "METADATA")
				{
					// Drop TS for channel METADATA
					// :sid METADATA #target TS extname ...
					//     A        B       C  D
					if (b == std::string::npos)
						return;

					std::string::size_type c = line.find(' ', b + 1);
					if (c == std::string::npos)
						return;

					if (line[b + 1] == '#')
					{
						// We're sending channel metadata
						std::string::size_type d = line.find(' ', c + 1);
						if (d == std::string::npos)
							return;

						line.erase(c, d-c);
					}
				}
				else if (command == "FTOPIC")
				{
					// Drop channel TS for FTOPIC
					// :sid FTOPIC #target TS TopicTS ...
					//     A      B       C  D
					if (b == std::string::npos)
						return;

					std::string::size_type c = line.find(' ', b + 1);
					if (c == std::string::npos)
						return;

					std::string::size_type d = line.find(' ', c + 1);
					if (d == std::string::npos)
						return;

					line.erase(c, d-c);
				}
			}
		}
	}

	ServerInstance->Logs->Log("m_spanningtree", LOG_RAWIO, "S[%d] O %s", this->GetFd(), line.c_str());
	this->WriteData(line);
	this->WriteData(newline);
}

namespace
{
	bool InsertCurrentChannelTS(std::vector<std::string>& params)
	{
		Channel* chan = ServerInstance->FindChan(params[0]);
		if (!chan)
			return false;

		// Insert the current TS of the channel between the first and the second parameters
		params.insert(params.begin()+1, ConvToStr(chan->age));
		return true;
	}
}

bool TreeSocket::PreProcessOldProtocolMessage(User*& who, std::string& cmd, std::vector<std::string>& params)
{
	if ((cmd == "METADATA") && (params.size() >= 3))
	{
		// :20D METADATA #channel extname :extdata
		return InsertCurrentChannelTS(params);
	}
	else if ((cmd == "FTOPIC") && (params.size() >= 4))
	{
		// :20D FTOPIC #channel 100 Attila :topic text
		return InsertCurrentChannelTS(params);
	}

	return true; // Passthru
}