759     TxFrame      &frame = mLinks.GetTxFrames().GetBroadcastTxFrame();  in PrepareBeaconRequest()  local
770     frameInfo.PrepareHeadersIn(frame);  in PrepareBeaconRequest()
774     return &frame;  in PrepareBeaconRequest()
779     TxFrame      *frame;  in PrepareBeacon()  local
789     frame = &mLinks.GetTxFrames().GetTxFrame(mTxBeaconRadioLinks);  in PrepareBeacon()
792     frame = &mLinks.GetTxFrames().GetBroadcastTxFrame();  in PrepareBeacon()
802     frameInfo.PrepareHeadersIn(*frame);  in PrepareBeacon()
804     beacon = reinterpret_cast<Beacon *>(frame->GetPayload());  in PrepareBeacon()
828     frame->SetPayloadLength(beaconLength);  in PrepareBeacon()
833     return frame;  in PrepareBeacon()
970     TxFrame  *frame    = nullptr;  in BeginTransmit()  local
987         frame = PrepareBeaconRequest();  in BeginTransmit()
988         VerifyOrExit(frame != nullptr);  in BeginTransmit()
989         frame->SetChannel(mScanChannel);  in BeginTransmit()
990         frame->SetSequence(0);  in BeginTransmit()
991         frame->SetMaxCsmaBackoffs(kMaxCsmaBackoffsDirect);  in BeginTransmit()
992         frame->SetMaxFrameRetries(mMaxFrameRetriesDirect);  in BeginTransmit()
996         frame = PrepareBeacon();  in BeginTransmit()
997         VerifyOrExit(frame != nullptr);  in BeginTransmit()
998         frame->SetChannel(mRadioChannel);  in BeginTransmit()
999         frame->SetSequence(mBeaconSequence++);  in BeginTransmit()
1000         frame->SetMaxCsmaBackoffs(kMaxCsmaBackoffsDirect);  in BeginTransmit()
1001         frame->SetMaxFrameRetries(mMaxFrameRetriesDirect);  in BeginTransmit()
1008         frame = Get<DataPollSender>().PrepareDataRequest(txFrames);  in BeginTransmit()
1009         VerifyOrExit(frame != nullptr);  in BeginTransmit()
1010         frame->SetSequence(mDataSequence++);  in BeginTransmit()
1020         frame = Get<MeshForwarder>().HandleFrameRequest(txFrames);  in BeginTransmit()
1021         VerifyOrExit(frame != nullptr);  in BeginTransmit()
1022         frame->SetSequence(mDataSequence++);  in BeginTransmit()
1030         frame = Get<DataPollHandler>().HandleFrameRequest(txFrames);  in BeginTransmit()
1031         VerifyOrExit(frame != nullptr);  in BeginTransmit()
1034         if (!frame->IsARetransmission())  in BeginTransmit()
1036             frame->SetSequence(mDataSequence++);  in BeginTransmit()
1045         frame = Get<CslTxScheduler>().HandleFrameRequest(txFrames);  in BeginTransmit()
1046         VerifyOrExit(frame != nullptr);  in BeginTransmit()
1049         if (!frame->IsARetransmission())  in BeginTransmit()
1051             frame->SetSequence(mDataSequence++);  in BeginTransmit()
1060         frame = Get<WakeupTxScheduler>().PrepareWakeupFrame(txFrames);  in BeginTransmit()
1061         VerifyOrExit(frame != nullptr);  in BeginTransmit()
1062         frame->SetChannel(mWakeupChannel);  in BeginTransmit()
1063         frame->SetRxChannelAfterTxDone(mRadioChannel);  in BeginTransmit()
1073         uint8_t timeIeOffset = GetTimeIeOffset(*frame);  in BeginTransmit()
1075         frame->SetTimeIeOffset(timeIeOffset);  in BeginTransmit()
1079             frame->SetTimeSyncSeq(Get<TimeSync>().GetTimeSyncSeq());  in BeginTransmit()
1080             frame->SetNetworkTimeOffset(Get<TimeSync>().GetNetworkTimeOffset());  in BeginTransmit()
1085     if (!frame->IsSecurityProcessed())  in BeginTransmit()
1100                     txFrame.CopyFrom(*frame);  in BeginTransmit()
1117         ProcessTransmitSecurity(*frame);  in BeginTransmit()
1142         mShouldDelaySleep = frame->GetFramePending();  in BeginTransmit()
1148     mLinks.Send(*frame, mTxPendingRadioLinks);  in BeginTransmit()
1155     if (frame == nullptr)  in BeginTransmit()
1163         frame = &txFrames.GetBroadcastTxFrame();  in BeginTransmit()
1164         frame->SetLength(0);  in BeginTransmit()
1165         HandleTransmitDone(*frame, nullptr, kErrorAbort);  in BeginTransmit()