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[mesh-forwarder] calculate PAN ID compression according to 802.15.4-2015 (#6739)

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This commit is contained in:
suveshpratapa
2021-06-16 13:02:00 -07:00
committed by GitHub
parent e3930f3c3f
commit f27a3c7b2a
1 changed files with 25 additions and 2 deletions
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src/core/thread/mesh_forwarder.cpp
+25 -2
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@@ -666,9 +666,32 @@ start:
break;
}
if (dstpan == Get<Mac::Mac>().GetPanId())
// Handle special case in 15.4-2015:
// Dest Address: Extended
// Source Address: Extended
// Dest PanId: Present
// Src Panid: Not Present
// Pan ID Compression: 0
if (dstpan == Get<Mac::Mac>().GetPanId() &&
((fcf & Mac::Frame::kFcfFrameVersionMask) == Mac::Frame::kFcfFrameVersion2006 ||
(fcf & Mac::Frame::kFcfDstAddrMask) != Mac::Frame::kFcfDstAddrExt ||
(fcf & Mac::Frame::kFcfSrcAddrMask) != Mac::Frame::kFcfSrcAddrExt))
{
fcf |= Mac::Frame::kFcfPanidCompression;
#if OPENTHREAD_CONFIG_MAC_HEADER_IE_SUPPORT
// Handle a special case in IEEE 802.15.4-2015, when Pan ID Compression is 0, but Src Pan ID is not present:
// Dest Address: Extended
// Src Address: Extended
// Dest Pan ID: Present
// Src Pan ID: Not Present
// Pan ID Compression: 0
if ((fcf & Mac::Frame::kFcfFrameVersionMask) != Mac::Frame::kFcfFrameVersion2015 ||
(fcf & Mac::Frame::kFcfDstAddrMask) != Mac::Frame::kFcfDstAddrExt ||
(fcf & Mac::Frame::kFcfSrcAddrMask) != Mac::Frame::kFcfSrcAddrExt)
#endif
{
fcf |= Mac::Frame::kFcfPanidCompression;
}
}
aFrame.InitMacHeader(fcf, secCtl);