Libpcap数据包捕获机制剖析与研究

38Libpcap3940DissectingandResearchingofPacketCaptureMechanismLibpcapYanLili1,TuTianlu2,ZhouXingtao11ChangchunUniversityOfScienceAndTechnology,Jilin,1300222SichuangUnicomthedepartmentofinformationsystems,Sichuang,610000Abstract:thispaperfullystudiesthestructureandprincipleofthepacketcapturelibrarylibpcap,andlibpcap-mmapwhichisthespecialversionoflibpcap.Intheend,theperformancesofthetwostructurearecomparedontheexperi-mentalresults.Keywords:Libpcap;BPF;mmap;packetcaptureTheAnalysisofTheDevelopmentAboutInfo-networkOpposedSystemZhangYongzhong,PanQiang,ZhangJunInstitutionofLogisticCommandPLA,Beijing,100858Abstract:The21stcenturyisinfosociety,andinfosecurityisoneofthepartofournationalsecuritystratagems.Ithasanimportantmeaningtoresearchinginfonetworkoppositionaltechniquesfordespoiling“controllinginfopower”.Thisarticleanalysesthefore-techniquesaboutnetworkattack&defensecounterwork,depictsthewholenetworkattack&defenseoppositionalsystem,anddissertatesthedevelopmentdirectionsofthenetworkattack&defensetechniques.Keywords:networksecurity;networkattack;networkdefense;oppositionalsystem