1 /*
2 * Copyright (c) 2018, The OpenThread Authors.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * 3. Neither the name of the copyright holder nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 /**
30 * @file
31 * This file implements MTD-specific mesh forwarding of IPv6/6LoWPAN messages.
32 */
33
34 #include "mesh_forwarder.hpp"
35
36 #if OPENTHREAD_MTD
37
38 namespace ot {
39
SendMessage(OwnedPtr<Message> aMessagePtr)40 void MeshForwarder::SendMessage(OwnedPtr<Message> aMessagePtr)
41 {
42 Message &message = *aMessagePtr.Release();
43
44 message.SetDirectTransmission();
45 message.SetOffset(0);
46 message.SetDatagramTag(0);
47 message.SetTimestampToNow();
48
49 mSendQueue.Enqueue(message);
50 mScheduleTransmissionTask.Post();
51
52 #if (OPENTHREAD_CONFIG_MAX_FRAMES_IN_DIRECT_TX_QUEUE > 0)
53 ApplyDirectTxQueueLimit(message);
54 #endif
55 }
56
EvictMessage(Message::Priority aPriority)57 Error MeshForwarder::EvictMessage(Message::Priority aPriority)
58 {
59 Error error = kErrorNotFound;
60 Message *message;
61
62 #if OPENTHREAD_CONFIG_DELAY_AWARE_QUEUE_MANAGEMENT_ENABLE
63 error = RemoveAgedMessages();
64 VerifyOrExit(error == kErrorNotFound);
65 #endif
66
67 VerifyOrExit((message = mSendQueue.GetTail()) != nullptr);
68
69 if (message->GetPriority() < static_cast<uint8_t>(aPriority))
70 {
71 EvictMessage(*message);
72 ExitNow(error = kErrorNone);
73 }
74
75 exit:
76 return error;
77 }
78
79 } // namespace ot
80
81 #endif // OPENTHREAD_MTD
82
