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
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/***************************************************************************
* Copyright (C) 2005 by Joris Guisson *
* [email protected] *
* *
* This program 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; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <unistd.h>
#include <string.h>
#include <net/portlist.h>
#include <util/log.h>
#include <util/error.h>
#include <torrent/globals.h>
#include <torrent/bnode.h>
#include <torrent/bdecoder.h>
#include <torrent/bencoder.h>
#include <tdesocketdevice.h>
#include "rpcserver.h"
#include "rpccall.h"
#include "rpcmsg.h"
#include "kbucket.h"
#include "node.h"
#include "dht.h"
using namespace KNetwork;
using namespace bt;
namespace dht
{
RPCServer::RPCServer(DHT* dh_table,Uint16 port,TQObject *parent) : TQObject(parent),dh_table(dh_table),next_mtid(0),port(port)
{
sock = new KDatagramSocket(this);
sock->setBlocking(false);
sock->setAddressReuseable(true);
}
RPCServer::~RPCServer()
{
bt::Globals::instance().getPortList().removePort(port,net::UDP);
sock->close();
calls.setAutoDelete(true);
calls.clear();
call_queue.setAutoDelete(true);
call_queue.clear();
}
void RPCServer::start()
{
sock->setBlocking(true);
if (!sock->bind(TQString(),TQString::number(port)))
{
Out(SYS_DHT|LOG_IMPORTANT) << "DHT: Failed to bind to UDP port " << port << " for DHT" << endl;
}
else
{
bt::Globals::instance().getPortList().addNewPort(port,net::UDP,true);
}
sock->setBlocking(false);
connect(sock,TQT_SIGNAL(readyRead()),this,TQT_SLOT(readPacket()));
}
void RPCServer::stop()
{
bt::Globals::instance().getPortList().removePort(port,net::UDP);
sock->close();
}
static void PrintRawData(const TQByteArray & data)
{
TQString tmp;
for (Uint32 i = 0;i < data.size();i++)
{
char c = TQChar(data[i]).latin1();
if (!TQChar(data[i]).isPrint() || c == 0)
tmp += '#';
else
tmp += c;
}
Out(SYS_DHT|LOG_DEBUG) << tmp << endl;
}
void RPCServer::readPacket()
{
if (sock->bytesAvailable() == 0)
{
Out(SYS_DHT|LOG_NOTICE) << "0 byte UDP packet " << endl;
// KDatagramSocket wrongly handles UDP packets with no payload
// so we need to deal with it oursleves
int fd = sock->socketDevice()->socket();
char tmp;
read(fd,&tmp,1);
return;
}
KDatagramPacket pck = sock->receive();
/*
Out() << "RPCServer::readPacket" << endl;
PrintRawData(pck.data());
*/
BNode* n = 0;
try
{
// read and decode the packet
BDecoder bdec(pck.data(),false);
n = bdec.decode();
if (!n || n->getType() != BNode::DICT)
{
delete n;
return;
}
// try to make a RPCMsg of it
MsgBase* msg = MakeRPCMsg((BDictNode*)n,this);
if (msg)
{
msg->setOrigin(pck.address());
msg->apply(dh_table);
// erase an existing call
if (msg->getType() == RSP_MSG && calls.contains(msg->getMTID()))
{
// delete the call, but first notify it off the response
RPCCall* c = calls.find(msg->getMTID());
c->response(msg);
calls.erase(msg->getMTID());
c->deleteLater();
doQueuedCalls();
}
delete msg;
}
}
catch (bt::Error & err)
{
Out(SYS_DHT|LOG_IMPORTANT) << "Error happened during parsing : " << err.toString() << endl;
}
delete n;
if (sock->bytesAvailable() > 0)
readPacket();
}
void RPCServer::send(const KNetwork::KSocketAddress & addr,const TQByteArray & msg)
{
sock->send(KNetwork::KDatagramPacket(msg,addr));
}
RPCCall* RPCServer::doCall(MsgBase* msg)
{
Uint8 start = next_mtid;
while (calls.contains(next_mtid))
{
next_mtid++;
if (next_mtid == start) // if this happens we cannot do any calls
{
// so queue the call
RPCCall* c = new RPCCall(this,msg,true);
call_queue.append(c);
Out(SYS_DHT|LOG_NOTICE) << "Queueing RPC call, no slots available at the moment" << endl;
return c;
}
}
msg->setMTID(next_mtid++);
sendMsg(msg);
RPCCall* c = new RPCCall(this,msg,false);
calls.insert(msg->getMTID(),c);
return c;
}
void RPCServer::sendMsg(MsgBase* msg)
{
TQByteArray data;
msg->encode(data);
send(msg->getDestination(),data);
// PrintRawData(data);
}
void RPCServer::timedOut(Uint8 mtid)
{
// delete the call
RPCCall* c = calls.find(mtid);
if (c)
{
dh_table->timeout(c->getRequest());
calls.erase(mtid);
c->deleteLater();
}
doQueuedCalls();
}
void RPCServer::doQueuedCalls()
{
while (call_queue.count() > 0 && calls.count() < 256)
{
RPCCall* c = call_queue.first();
call_queue.removeFirst();
while (calls.contains(next_mtid))
next_mtid++;
MsgBase* msg = c->getRequest();
msg->setMTID(next_mtid++);
sendMsg(msg);
calls.insert(msg->getMTID(),c);
c->start();
}
}
const RPCCall* RPCServer::findCall(Uint8 mtid) const
{
return calls.find(mtid);
}
void RPCServer::ping(const dht::Key & our_id,const KNetwork::KSocketAddress & addr)
{
Out(SYS_DHT|LOG_NOTICE) << "DHT: pinging " << addr.nodeName() << endl;
PingReq* pr = new PingReq(our_id);
pr->setOrigin(addr);
doCall(pr);
}
}
#include "rpcserver.moc"
|
