549     FragmentHeader fragmentHeader;  in FragmentDatagram()  local
556 … FragmentHeader::MakeDivisibleByEight(kMinimalMtu - aMessage.GetOffset() - sizeof(fragmentHeader));  in FragmentDatagram()
562     fragmentHeader.Init();  in FragmentDatagram()
563     fragmentHeader.SetIdentification(Random::NonCrypto::GetUint32());  in FragmentDatagram()
564     fragmentHeader.SetNextHeader(aIpProto);  in FragmentDatagram()
565     fragmentHeader.SetMoreFlag();  in FragmentDatagram()
571             fragmentHeader.ClearMoreFlag();  in FragmentDatagram()
585         fragmentHeader.SetOffset(offset);  in FragmentDatagram()
589 …SuccessOrExit(error = fragment->SetLength(aMessage.GetOffset() + sizeof(fragmentHeader) + payloadF…  in FragmentDatagram()
591         header.SetPayloadLength(payloadFragment + sizeof(fragmentHeader));  in FragmentDatagram()
595         fragment->Write(aMessage.GetOffset(), fragmentHeader);  in FragmentDatagram()
598             /* aWriteOffset */ aMessage.GetOffset() + sizeof(fragmentHeader), aMessage,  in FragmentDatagram()
627     FragmentHeader fragmentHeader;  in HandleFragment()  local
634     SuccessOrExit(error = aMessage.Read(aMessage.GetOffset(), fragmentHeader));  in HandleFragment()
636     if (fragmentHeader.GetOffset() == 0 && !fragmentHeader.IsMoreFlagSet())  in HandleFragment()
639         aMessage.MoveOffset(sizeof(fragmentHeader));  in HandleFragment()
647         if (msg.GetDatagramTag() == fragmentHeader.GetIdentification() &&  in HandleFragment()
655     offset          = FragmentHeader::FragmentOffsetToBytes(fragmentHeader.GetOffset());  in HandleFragment()
656     payloadFragment = aMessage.GetLength() - aMessage.GetOffset() - sizeof(fragmentHeader);  in HandleFragment()
658 …LogInfo("Fragment with id %lu received > %u bytes, offset %u", ToUlong(fragmentHeader.GetIdentific…  in HandleFragment()
675         message->SetDatagramTag(fragmentHeader.GetIdentification());  in HandleFragment()
692 …   /* aReadOffset */ aMessage.GetOffset() + sizeof(fragmentHeader), /* aLength */ payloadFragment);  in HandleFragment()
695     if (!fragmentHeader.IsMoreFlagSet())  in HandleFragment()
703         header.SetNextHeader(fragmentHeader.GetNextHeader());  in HandleFragment()
793     FragmentHeader fragmentHeader;  in HandleFragment()  local
795     SuccessOrExit(error = aMessage.Read(aMessage.GetOffset(), fragmentHeader));  in HandleFragment()
797 …VerifyOrExit(fragmentHeader.GetOffset() == 0 && !fragmentHeader.IsMoreFlagSet(), error = kErrorDro…  in HandleFragment()
799     aMessage.MoveOffset(sizeof(fragmentHeader));  in HandleFragment()
1558     Lowpan::FragmentHeader fragmentHeader;  in DecompressFrom()  local
1561     if (fragmentHeader.ParseFrom(frameData) == kErrorNone)  in DecompressFrom()
1564         VerifyOrExit(fragmentHeader.GetDatagramOffset() == 0, error = kErrorNotFound);  in DecompressFrom()