1 /* <!-- copyright */
2 /*
3 * aria2 - The high speed download utility
4 *
5 * Copyright (C) 2013 Tatsuhiro Tsujikawa
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * In addition, as a special exception, the copyright holders give
22 * permission to link the code of portions of this program with the
23 * OpenSSL library under certain conditions as described in each
24 * individual source file, and distribute linked combinations
25 * including the two.
26 * You must obey the GNU General Public License in all respects
27 * for all of the code used other than OpenSSL. If you modify
28 * file(s) with this exception, you may extend this exception to your
29 * version of the file(s), but you are not obligated to do so. If you
30 * do not wish to do so, delete this exception statement from your
31 * version. If you delete this exception statement from all source
32 * files in the program, then also delete it here.
33 */
34 /* copyright --> */
35 #include "BackupIPv4ConnectCommand.h"
36 #include "RequestGroup.h"
37 #include "DownloadEngine.h"
38 #include "SocketCore.h"
39 #include "wallclock.h"
40 #include "RecoverableException.h"
41 #include "fmt.h"
42 #include "LogFactory.h"
43 #include "prefs.h"
44 #include "Option.h"
45
46 namespace aria2 {
47
BackupConnectInfo()48 BackupConnectInfo::BackupConnectInfo() : cancel(false) {}
49
BackupIPv4ConnectCommand(cuid_t cuid,const std::string & ipaddr,uint16_t port,const std::shared_ptr<BackupConnectInfo> & info,Command * mainCommand,RequestGroup * requestGroup,DownloadEngine * e)50 BackupIPv4ConnectCommand::BackupIPv4ConnectCommand(
51 cuid_t cuid, const std::string& ipaddr, uint16_t port,
52 const std::shared_ptr<BackupConnectInfo>& info, Command* mainCommand,
53 RequestGroup* requestGroup, DownloadEngine* e)
54 : Command(cuid),
55 ipaddr_(ipaddr),
56 port_(port),
57 info_(info),
58 mainCommand_(mainCommand),
59 requestGroup_(requestGroup),
60 e_(e),
61 startTime_(global::wallclock()),
62 timeoutCheck_(global::wallclock()),
63 timeout_(requestGroup_->getOption()->getAsInt(PREF_CONNECT_TIMEOUT))
64 {
65 requestGroup_->increaseStreamCommand();
66 requestGroup_->increaseNumCommand();
67 }
68
~BackupIPv4ConnectCommand()69 BackupIPv4ConnectCommand::~BackupIPv4ConnectCommand()
70 {
71 requestGroup_->decreaseNumCommand();
72 requestGroup_->decreaseStreamCommand();
73 if (socket_) {
74 e_->deleteSocketForWriteCheck(socket_, this);
75 }
76 }
77
execute()78 bool BackupIPv4ConnectCommand::execute()
79 {
80 bool retval = false;
81 if (requestGroup_->downloadFinished() || requestGroup_->isHaltRequested()) {
82 retval = true;
83 }
84 else if (info_->cancel) {
85 A2_LOG_INFO(
86 fmt("CUID#%" PRId64 " - Backup connection canceled", getCuid()));
87 retval = true;
88 }
89 else if (socket_) {
90 if (writeEventEnabled()) {
91 try {
92 std::string error = socket_->getSocketError();
93 if (error.empty()) {
94 A2_LOG_INFO(fmt("CUID#%" PRId64 " - Backup connection to %s "
95 "established",
96 getCuid(), ipaddr_.c_str()));
97 info_->ipaddr = ipaddr_;
98 e_->deleteSocketForWriteCheck(socket_, this);
99 info_->socket.swap(socket_);
100 mainCommand_->setStatus(STATUS_ONESHOT_REALTIME);
101 e_->setNoWait(true);
102 retval = true;
103 }
104 else {
105 A2_LOG_INFO(fmt("CUID#%" PRId64 " - Backup connection failed: %s",
106 getCuid(), error.c_str()));
107 retval = true;
108 }
109 }
110 catch (RecoverableException& e) {
111 A2_LOG_INFO_EX(
112 fmt("CUID#%" PRId64 " - Backup connection failed", getCuid()), e);
113 retval = true;
114 }
115 }
116 }
117 else if (!socket_) {
118 // TODO Although we check 300ms initial timeout as described in
119 // RFC 6555, the interval will be much longer and around 1 second
120 // due to the refresh interval mechanism in DownloadEngine.
121 if (startTime_.difference(global::wallclock()) >=
122 std::chrono::milliseconds(300)) {
123 socket_ = std::make_shared<SocketCore>();
124 try {
125 socket_->establishConnection(ipaddr_, port_);
126 e_->addSocketForWriteCheck(socket_, this);
127 timeoutCheck_ = global::wallclock();
128 }
129 catch (RecoverableException& e) {
130 A2_LOG_INFO_EX(
131 fmt("CUID#%" PRId64 " - Backup connection failed", getCuid()), e);
132 socket_.reset();
133 retval = true;
134 }
135 }
136 }
137 else if (timeoutCheck_.difference(global::wallclock()) >= timeout_) {
138 A2_LOG_INFO(
139 fmt("CUID#%" PRId64 " - Backup connection command timeout", getCuid()));
140 retval = true;
141 }
142 if (!retval) {
143 e_->addCommand(std::unique_ptr<Command>(this));
144 }
145 return retval;
146 }
147
148 } // namespace aria2
149