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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2007-2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Craig Edwards <craigedwards@brainbox.cc>
* Copyright (C) 2007 Dennis Friis <peavey@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 "iohook.h"
#include "main.h"
#include "utils.h"
#include "treeserver.h"
#include "link.h"
#include "treesocket.h"
#include "commands.h"
/** Constructor for outgoing connections.
* Because most of the I/O gubbins are encapsulated within
* BufferedSocket, we just call DoConnect() for most of the action,
* and only do minor initialization tasks ourselves.
*/
TreeSocket::TreeSocket(Link* link, Autoconnect* myac, const irc::sockets::sockaddrs& dest)
: linkID(link->Name), LinkState(CONNECTING), MyRoot(NULL), proto_version(0)
, burstsent(false), age(ServerInstance->Time())
{
capab = new CapabData;
capab->link = link;
capab->ac = myac;
capab->capab_phase = 0;
irc::sockets::sockaddrs bind;
memset(&bind, 0, sizeof(bind));
if (!link->Bind.empty() && (dest.family() == AF_INET || dest.family() == AF_INET6))
{
if (!irc::sockets::aptosa(link->Bind, 0, bind))
{
state = I_ERROR;
SetError("Bind address '" + link->Bind + "' is not a valid IPv4 or IPv6 address");
TreeSocket::OnError(I_ERR_BIND);
return;
}
else if (bind.family() != dest.family())
{
state = I_ERROR;
SetError("Bind address '" + bind.addr() + "' is not the same address family as destination address '" + dest.addr() + "'");
TreeSocket::OnError(I_ERR_BIND);
return;
}
}
DoConnect(dest, bind, link->Timeout);
Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, link->Timeout);
SendCapabilities(1);
}
/** Constructor for incoming connections
*/
TreeSocket::TreeSocket(int newfd, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
: BufferedSocket(newfd)
, linkID("inbound from " + client->addr()), LinkState(WAIT_AUTH_1), MyRoot(NULL), proto_version(0)
, burstsent(false), age(ServerInstance->Time())
{
capab = new CapabData;
capab->capab_phase = 0;
for (ListenSocket::IOHookProvList::iterator i = via->iohookprovs.begin(); i != via->iohookprovs.end(); ++i)
{
ListenSocket::IOHookProvRef& iohookprovref = *i;
if (!iohookprovref)
continue;
iohookprovref->OnAccept(this, client, server);
// IOHook could have encountered a fatal error, e.g. if the TLS ClientHello was already in the queue and there was no common TLS version
if (!getError().empty())
{
TreeSocket::OnError(I_ERR_OTHER);
return;
}
}
SendCapabilities(1);
Utils->timeoutlist[this] = std::pair<std::string, unsigned int>(linkID, 30);
}
void TreeSocket::CleanNegotiationInfo()
{
// connect is good, reset the autoconnect block (if used)
if (capab->ac)
capab->ac->position = -1;
delete capab;
capab = NULL;
}
CullResult TreeSocket::cull()
{
Utils->timeoutlist.erase(this);
if (capab && capab->ac)
Utils->Creator->ConnectServer(capab->ac, false);
return this->BufferedSocket::cull();
}
TreeSocket::~TreeSocket()
{
delete capab;
}
/** When an outbound connection finishes connecting, we receive
* this event, and must do CAPAB negotiation with the other
* side. If the other side is happy, as outlined in the server
* to server docs on the inspircd.org site, the other side
* will then send back its own SERVER string eventually.
*/
void TreeSocket::OnConnected()
{
if (this->LinkState == CONNECTING)
{
if (!capab->link->Hook.empty())
{
ServiceProvider* prov = ServerInstance->Modules->FindService(SERVICE_IOHOOK, capab->link->Hook);
if (!prov)
{
SetError("Could not find hook '" + capab->link->Hook + "' for connection to " + linkID);
return;
}
static_cast<IOHookProvider*>(prov)->OnConnect(this);
}
ServerInstance->SNO->WriteGlobalSno('l', "Connection to \002%s\002[%s] started.", linkID.c_str(),
(capab->link->HiddenFromStats ? "<hidden>" : capab->link->IPAddr.c_str()));
this->SendCapabilities(1);
}
}
void TreeSocket::OnError(BufferedSocketError e)
{
ServerInstance->SNO->WriteGlobalSno('l', "Connection to '\002%s\002' failed with error: %s",
linkID.c_str(), getError().c_str());
LinkState = DYING;
Close();
}
void TreeSocket::SendError(const std::string &errormessage)
{
WriteLine("ERROR :"+errormessage);
DoWrite();
LinkState = DYING;
SetError(errormessage);
}
CmdResult CommandSQuit::HandleServer(TreeServer* server, CommandBase::Params& params)
{
TreeServer* quitting = Utils->FindServer(params[0]);
if (!quitting)
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Squit from unknown server");
return CMD_FAILURE;
}
CmdResult ret = CMD_SUCCESS;
if (quitting == server)
{
ret = CMD_FAILURE;
server = server->GetParent();
}
else if (quitting->GetParent() != server)
throw ProtocolException("Attempted to SQUIT a non-directly connected server or the parent");
server->SQuitChild(quitting, params[1]);
// XXX: Return CMD_FAILURE when servers SQUIT themselves (i.e. :00S SQUIT 00S :Shutting down)
// to stop this message from being forwarded.
// The squit logic generates a SQUIT message with our sid as the source and sends it to the
// remaining servers.
return ret;
}
/** This function is called when we receive data from a remote
* server.
*/
void TreeSocket::OnDataReady()
{
Utils->Creator->loopCall = true;
std::string line;
while (GetNextLine(line))
{
std::string::size_type rline = line.find('\r');
if (rline != std::string::npos)
line.erase(rline);
if (line.find('\0') != std::string::npos)
{
SendError("Read null character from socket");
break;
}
try
{
ProcessLine(line);
}
catch (CoreException& ex)
{
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Error while processing: " + line);
ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, ex.GetReason());
SendError(ex.GetReason() + " - check the log file for details");
}
if (!getError().empty())
break;
}
if (LinkState != CONNECTED && recvq.length() > 4096)
SendError("RecvQ overrun (line too long)");
Utils->Creator->loopCall = false;
}
|
