171     mMpl.InitOption(mplOption, aHeader.GetSource());  in AddMplOption()
267         mMpl.InitOption(mplOption, aHeader.GetSource());  in InsertMplOption()
458 …  Checksum::UpdateMessageChecksum(aMessage, header.GetSource(), header.GetDestination(), aIpProto);  in SendDatagram()
531 …   SuccessOrExit(error = mMpl.ProcessOption(aMessage, offsetRange, aHeader.GetSource(), aReceive));  in HandleOptions()
648 …headerBuffer.GetSource() == header.GetSource() && headerBuffer.GetDestination() == header.GetDesti…  in HandleFragment()
769     messageInfo.SetPeerAddr(header.GetSource());  in SendIcmpError()
876     messageInfo.SetPeerAddr(aIp6Header.GetSource());  in Receive()
950     if (Get<Mle::Mle>().IsMeshLocalAddress(aHeader.GetSource()))  in PassToHost()
1024 …(aHeader.GetSource().IsLinkLocalUnicast() || (Get<Mle::Mle>().IsMeshLocalAddress(aHeader.GetSource…  in PassToHost()
1043     VerifyOrExit(!header.GetSource().IsMulticast(), error = kErrorInvalidSourceAddress);  in SendRaw()
1047     if (!Get<BackboneRouter::Leader>().IsDomainUnicast(header.GetSource()))  in SendRaw()
1052         if (Get<NetworkData::Leader>().IsOnMesh(header.GetSource()) ||  in SendRaw()
1055 …        VerifyOrExit(Get<ThreadNetif>().HasUnicastAddress(header.GetSource()), error = kErrorDrop);  in SendRaw()
1091 …VerifyOrExit(!header.GetSource().IsLoopback() && !header.GetDestination().IsLoopback(), error = kE…  in HandleDatagram()
1143             else if (RouteLookup(header.GetSource(), header.GetDestination()) == kErrorNone)  in HandleDatagram()
1410     VerifyOrExit(!aHeader.GetSource().IsLinkLocalUnicast());  in UpdateBorderRoutingCounters()
1412     VerifyOrExit(!Get<Mle::Mle>().IsMeshLocalAddress(aHeader.GetSource()));  in UpdateBorderRoutingCounters()
1417         VerifyOrExit(!Get<Netif>().HasUnicastAddress(aHeader.GetSource()));  in UpdateBorderRoutingCounters()
1419 …    if (!aHeader.GetSource().MatchesPrefix(aHeader.GetDestination().GetPrefix().m8, kPrefixLength))  in UpdateBorderRoutingCounters()
1438 …    if (!aHeader.GetSource().MatchesPrefix(aHeader.GetDestination().GetPrefix().m8, kPrefixLength))  in UpdateBorderRoutingCounters()