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
|
/* <!-- 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 "PeerListenCommand.h"
#include <utility>
#include <algorithm>
#include "DownloadEngine.h"
#include "Peer.h"
#include "RequestGroupMan.h"
#include "RecoverableException.h"
#include "message.h"
#include "ReceiverMSEHandshakeCommand.h"
#include "Logger.h"
#include "LogFactory.h"
#include "SocketCore.h"
#include "SimpleRandomizer.h"
#include "util.h"
#include "fmt.h"
namespace aria2 {
PeerListenCommand::PeerListenCommand(cuid_t cuid, DownloadEngine* e, int family)
: Command(cuid), e_(e), family_(family)
{
}
PeerListenCommand::~PeerListenCommand() = default;
bool PeerListenCommand::bindPort(uint16_t& port, SegList<int>& sgl)
{
socket_ = std::make_shared<SocketCore>();
std::vector<uint16_t> ports;
while (sgl.hasNext()) {
ports.push_back(sgl.next());
}
std::shuffle(ports.begin(), ports.end(), *SimpleRandomizer::getInstance());
const int ipv = (family_ == AF_INET) ? 4 : 6;
for (std::vector<uint16_t>::const_iterator i = ports.begin(),
eoi = ports.end();
i != eoi; ++i) {
port = *i;
try {
socket_->bind(nullptr, port, family_);
socket_->beginListen();
A2_LOG_NOTICE(
fmt(_("IPv%d BitTorrent: listening on TCP port %u"), ipv, port));
return true;
}
catch (RecoverableException& ex) {
A2_LOG_ERROR_EX(
fmt("IPv%d BitTorrent: failed to bind TCP port %u", ipv, port), ex);
socket_->closeConnection();
}
}
return false;
}
uint16_t PeerListenCommand::getPort() const
{
if (!socket_) {
return 0;
}
return socket_->getAddrInfo().port;
}
bool PeerListenCommand::execute()
{
if (e_->isHaltRequested() || e_->getRequestGroupMan()->downloadFinished()) {
return true;
}
for (int i = 0; i < 3 && socket_->isReadable(0); ++i) {
std::shared_ptr<SocketCore> peerSocket;
try {
peerSocket = socket_->acceptConnection();
peerSocket->applyIpDscp();
auto endpoint = peerSocket->getPeerInfo();
auto peer = std::make_shared<Peer>(endpoint.addr, endpoint.port, true);
cuid_t cuid = e_->newCUID();
e_->addCommand(
make_unique<ReceiverMSEHandshakeCommand>(cuid, peer, e_, peerSocket));
A2_LOG_DEBUG(fmt("Accepted the connection from %s:%u.",
peer->getIPAddress().c_str(), peer->getPort()));
A2_LOG_DEBUG(fmt(
"Added CUID#%" PRId64 " to receive BitTorrent/MSE handshake.", cuid));
}
catch (RecoverableException& ex) {
A2_LOG_DEBUG_EX(fmt(MSG_ACCEPT_FAILURE, getCuid()), ex);
}
}
e_->addCommand(std::unique_ptr<Command>(this));
return false;
}
} // namespace aria2
|
