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
|
/* <!-- copyright */
/*
* aria2 - The high speed download utility
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
/* copyright --> */
#include "BtBitfieldMessage.h"
#include <cstring>
#include "bittorrent_helper.h"
#include "util.h"
#include "DlAbortEx.h"
#include "message.h"
#include "Peer.h"
#include "PieceStorage.h"
#include "a2functional.h"
namespace aria2 {
const char BtBitfieldMessage::NAME[] = "bitfield";
BtBitfieldMessage::BtBitfieldMessage():SimpleBtMessage(ID, NAME),
bitfield_(nullptr),
bitfieldLength_(0)
{}
BtBitfieldMessage::BtBitfieldMessage
(const unsigned char* bitfield, size_t bitfieldLength):
SimpleBtMessage(ID, NAME),
bitfield_(nullptr),
bitfieldLength_(0)
{
setBitfield(bitfield, bitfieldLength);
}
BtBitfieldMessage::~BtBitfieldMessage()
{
delete [] bitfield_;
}
void BtBitfieldMessage::setBitfield
(const unsigned char* bitfield, size_t bitfieldLength) {
if(bitfield_ == bitfield) {
return;
}
delete [] bitfield_;
bitfieldLength_ = bitfieldLength;
bitfield_ = new unsigned char[bitfieldLength_];
memcpy(bitfield_, bitfield, bitfieldLength_);
}
std::unique_ptr<BtBitfieldMessage>
BtBitfieldMessage::create(const unsigned char* data, size_t dataLength)
{
bittorrent::assertPayloadLengthGreater(1,dataLength, NAME);
bittorrent::assertID(ID, data, NAME);
auto message = make_unique<BtBitfieldMessage>();
message->setBitfield(data+1, dataLength-1);
return message;
}
void BtBitfieldMessage::doReceivedAction() {
if(isMetadataGetMode()) {
return;
}
getPieceStorage()->updatePieceStats(bitfield_, bitfieldLength_,
getPeer()->getBitfield());
getPeer()->setBitfield(bitfield_, bitfieldLength_);
if(getPeer()->isSeeder() && getPieceStorage()->downloadFinished()) {
throw DL_ABORT_EX(MSG_GOOD_BYE_SEEDER);
}
}
unsigned char* BtBitfieldMessage::createMessage() {
/**
* len --- 1+bitfieldLength, 4bytes
* id --- 5, 1byte
* bitfield --- bitfield, bitfieldLength bytes
* total: 5+bitfieldLength bytes
*/
const size_t msgLength = 5+bitfieldLength_;
auto msg = new unsigned char[msgLength];
bittorrent::createPeerMessageString(msg, msgLength, 1+bitfieldLength_, ID);
memcpy(msg+5, bitfield_, bitfieldLength_);
return msg;
}
size_t BtBitfieldMessage::getMessageLength() {
return 5+bitfieldLength_;
}
std::string BtBitfieldMessage::toString() const {
std::string s = NAME;
s += " ";
s += util::toHex(bitfield_, bitfieldLength_);
return s;
}
} // namespace aria2
|
