slides - PDOS - MIT
slides - PDOS - MIT
slides - PDOS - MIT
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A packet filtering example• Strawman II: extensible kernel module• tcpdump uploads compiled native code to the kernelip*src*net*not*(18.26.5.0/24*or*18.0.0.0/24)tcpdumpkernelNativecodeld*****12(%ebx),*%eax*test***%eax,*$0x800jeq****L3ld*****26(%ebx),*%eaxand****%eax,*$0xffffff00********...filteredpackets***** ***** packetsKernel module