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
|
/* <!-- 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 "ActivePeerConnectionCommand.h"
#include "PeerInitiateConnectionCommand.h"
#include "CUIDCounter.h"
#include "message.h"
#include "DownloadEngine.h"
#include "BtContext.h"
#include "PeerStorage.h"
#include "PieceStorage.h"
#include "BtRuntime.h"
#include "Peer.h"
#include "Logger.h"
#include "prefs.h"
#include "Option.h"
#include "BtConstants.h"
namespace aria2 {
ActivePeerConnectionCommand::ActivePeerConnectionCommand(int cuid,
RequestGroup* requestGroup,
DownloadEngine* e,
const BtContextHandle& btContext,
int32_t interval)
:Command(cuid),
BtContextAwareCommand(btContext),
RequestGroupAware(requestGroup),
interval(interval),
e(e),
_thresholdSpeed(SLOW_SPEED_THRESHOLD),
_numNewConnection(5)
{
int32_t maxDownloadSpeed = e->option->getAsInt(PREF_MAX_DOWNLOAD_LIMIT);
if(maxDownloadSpeed > 0) {
_thresholdSpeed = std::min(maxDownloadSpeed, _thresholdSpeed);
}
}
ActivePeerConnectionCommand::~ActivePeerConnectionCommand() {}
bool ActivePeerConnectionCommand::execute() {
if(btRuntime->isHalt()) {
return true;
}
if(!pieceStorage->downloadFinished() && checkPoint.elapsed(interval)) {
checkPoint.reset();
TransferStat tstat = peerStorage->calculateStat();
size_t numAdd = btRuntime->lessThanEqMinPeer() ? MIN_PEERS-btRuntime->getConnections():_numNewConnection;
if(tstat.getDownloadSpeed() < _thresholdSpeed || btRuntime->lessThanEqMinPeer()) {
for(; numAdd > 0 && peerStorage->isPeerAvailable(); --numAdd) {
PeerHandle peer = peerStorage->getUnusedPeer();
connectToPeer(peer);
}
}
}
e->commands.push_back(this);
return false;
}
void ActivePeerConnectionCommand::connectToPeer(const PeerHandle& peer)
{
if(peer.isNull()) {
return;
}
peer->usedBy(CUIDCounterSingletonHolder::instance()->newID());
PeerInitiateConnectionCommand* command =
new PeerInitiateConnectionCommand(peer->usedBy(), _requestGroup, peer, e, btContext);
e->commands.push_back(command);
logger->info(MSG_CONNECTING_TO_PEER,
cuid, peer->ipaddr.c_str());
}
} // namespace aria2
|
