1 /* <!-- copyright */
2 /*
3 * aria2 - The high speed download utility
4 *
5 * Copyright (C) 2006 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 "DHTMessageDispatcherImpl.h"
36 #include "DHTMessage.h"
37 #include "DHTMessageCallback.h"
38 #include "DHTMessageEntry.h"
39 #include "DHTMessageTracker.h"
40 #include "RecoverableException.h"
41 #include "LogFactory.h"
42 #include "Logger.h"
43 #include "DHTConstants.h"
44 #include "fmt.h"
45 #include "DHTNode.h"
46 #include "a2functional.h"
47
48 namespace aria2 {
49
DHTMessageDispatcherImpl(const std::shared_ptr<DHTMessageTracker> & tracker)50 DHTMessageDispatcherImpl::DHTMessageDispatcherImpl(
51 const std::shared_ptr<DHTMessageTracker>& tracker)
52 : tracker_{tracker}, timeout_{DHT_MESSAGE_TIMEOUT}
53 {
54 }
55
addMessageToQueue(std::unique_ptr<DHTMessage> message,std::chrono::seconds timeout,std::unique_ptr<DHTMessageCallback> callback)56 void DHTMessageDispatcherImpl::addMessageToQueue(
57 std::unique_ptr<DHTMessage> message, std::chrono::seconds timeout,
58 std::unique_ptr<DHTMessageCallback> callback)
59 {
60 messageQueue_.push_back(make_unique<DHTMessageEntry>(
61 std::move(message), std::move(timeout), std::move(callback)));
62 }
63
addMessageToQueue(std::unique_ptr<DHTMessage> message,std::unique_ptr<DHTMessageCallback> callback)64 void DHTMessageDispatcherImpl::addMessageToQueue(
65 std::unique_ptr<DHTMessage> message,
66 std::unique_ptr<DHTMessageCallback> callback)
67 {
68 addMessageToQueue(std::move(message), timeout_, std::move(callback));
69 }
70
sendMessage(DHTMessageEntry * entry)71 bool DHTMessageDispatcherImpl::sendMessage(DHTMessageEntry* entry)
72 {
73 try {
74 if (entry->message->send()) {
75 if (!entry->message->isReply()) {
76 tracker_->addMessage(entry->message.get(), entry->timeout,
77 std::move(entry->callback));
78 }
79 A2_LOG_INFO(fmt("Message sent: %s", entry->message->toString().c_str()));
80 }
81 else {
82 return false;
83 }
84 }
85 catch (RecoverableException& e) {
86 A2_LOG_INFO_EX(
87 fmt("Failed to send message: %s", entry->message->toString().c_str()),
88 e);
89 // Add message to DHTMessageTracker with timeout 0 to treat it as
90 // time out. Without this, we have untracked message and some of
91 // DHTTask(such as DHTAbstractNodeLookupTask) don't finish
92 // forever.
93 if (!entry->message->isReply()) {
94 tracker_->addMessage(entry->message.get(), 0_s,
95 std::move(entry->callback));
96 }
97 }
98 return true;
99 }
100
sendMessages()101 void DHTMessageDispatcherImpl::sendMessages()
102 {
103 auto itr = std::begin(messageQueue_);
104 for (; itr != std::end(messageQueue_); ++itr) {
105 if (!sendMessage((*itr).get())) {
106 break;
107 }
108 }
109 messageQueue_.erase(std::begin(messageQueue_), itr);
110 A2_LOG_DEBUG(fmt("%lu dht messages remaining in the queue.",
111 static_cast<unsigned long>(messageQueue_.size())));
112 }
113
countMessageInQueue() const114 size_t DHTMessageDispatcherImpl::countMessageInQueue() const
115 {
116 return messageQueue_.size();
117 }
118
119 } // namespace aria2
120