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
|
/***************************************************************************
* 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 <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <util/array.h>
#include <ksocketaddress.h>
#include <kdatagramsocket.h>
#include <ksocketdevice.h>
#include <net/portlist.h>
#include <util/log.h>
#include <util/functions.h>
#include <klocale.h>
#include <kmessagebox.h>
#include "globals.h"
#include "udptrackersocket.h"
using namespace KNetwork;
namespace bt
{
Uint16 UDPTrackerSocket::port = 4444;
UDPTrackerSocket::UDPTrackerSocket()
{
sock = new KNetwork::KDatagramSocket(this);
sock->setAddressReuseable(true);
connect(sock,SIGNAL(readyRead()),this,SLOT(dataReceived()));
int i = 0;
if (port == 0)
port = 4444;
bool bound = false;
while (!(bound = sock->bind(QString::null,QString::number(port + i))) && i < 10)
{
Out() << "Failed to bind socket to port " << (port+i) << endl;
i++;
}
if (!bound)
{
KMessageBox::error(0,
i18n("Cannot bind to udp port %1 or the 10 following ports.").arg(port));
}
else
{
port = port + i;
Globals::instance().getPortList().addNewPort(port,net::UDP,true);
}
}
UDPTrackerSocket::~UDPTrackerSocket()
{
Globals::instance().getPortList().removePort(port,net::UDP);
delete sock;
}
void UDPTrackerSocket::sendConnect(Int32 tid,const KNetwork::KSocketAddress & addr)
{
Int64 cid = 0x41727101980LL;
Uint8 buf[16];
WriteInt64(buf,0,cid);
WriteInt32(buf,8,CONNECT);
WriteInt32(buf,12,tid);
sock->send(KDatagramPacket((char*)buf,16,addr));
transactions.insert(tid,CONNECT);
}
void UDPTrackerSocket::sendAnnounce(Int32 tid,const Uint8* data,const KNetwork::KSocketAddress & addr)
{
transactions.insert(tid,ANNOUNCE);
sock->send(KDatagramPacket((char*)data,98,addr));
}
void UDPTrackerSocket::cancelTransaction(Int32 tid)
{
transactions.remove(tid);
}
void UDPTrackerSocket::handleConnect(const QByteArray & data)
{
const Uint8* buf = (const Uint8*)data.data();
// Read the transaction_id and check it
Int32 tid = ReadInt32(buf,4);
QMap<Int32,Action>::iterator i = transactions.find(tid);
// if we can't find the transaction, just return
if (i == transactions.end())
{
return;
}
// check wether the transaction is a CONNECT
if (i.data() != CONNECT)
{
transactions.erase(i);
error(tid,QString::null);
return;
}
// everything ok, emit signal
transactions.erase(i);
connectRecieved(tid,ReadInt64(buf,8));
}
void UDPTrackerSocket::handleAnnounce(const QByteArray & data)
{
const Uint8* buf = (const Uint8*)data.data();
// Read the transaction_id and check it
Int32 tid = ReadInt32(buf,4);
QMap<Int32,Action>::iterator i = transactions.find(tid);
// if we can't find the transaction, just return
if (i == transactions.end())
return;
// check wether the transaction is a ANNOUNCE
if (i.data() != ANNOUNCE)
{
transactions.erase(i);
error(tid,QString::null);
return;
}
// everything ok, emit signal
transactions.erase(i);
announceRecieved(tid,data);
}
void UDPTrackerSocket::handleError(const QByteArray & data)
{
const Uint8* buf = (const Uint8*)data.data();
// Read the transaction_id and check it
Int32 tid = ReadInt32(buf,4);
QMap<Int32,Action>::iterator it = transactions.find(tid);
// if we can't find the transaction, just return
if (it == transactions.end())
return;
// extract error message
transactions.erase(it);
QString msg;
for (Uint32 i = 8;i < data.size();i++)
msg += (char)buf[i];
// emit signal
error(tid,msg);
}
void UDPTrackerSocket::dataReceived()
{
if (sock->bytesAvailable() == 0)
{
Out(SYS_TRK|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();
const QByteArray & data = pck.data();
const Uint8* buf = (const Uint8*)data.data();
Uint32 type = ReadUint32(buf,0);
switch (type)
{
case CONNECT:
handleConnect(data);
break;
case ANNOUNCE:
handleAnnounce(data);
break;
case ERROR:
handleError(data);
break;
}
}
Int32 UDPTrackerSocket::newTransactionID()
{
Int32 transaction_id = rand() * time(0);
while (transactions.contains(transaction_id))
transaction_id++;
return transaction_id;
}
void UDPTrackerSocket::setPort(Uint16 p)
{
port = p;
}
Uint16 UDPTrackerSocket::getPort()
{
return port;
}
}
#include "udptrackersocket.moc"
|
