嵌入式 TCPIP 的研究与实现

ITCP/IP20032IIUDCTCP/IP200322003220032IIIADissertationinComputerApplicationResearchandImplementationofEmbeddedTCP/IPbyShiXudongSupervisor:AssociateProfessorZhangDaboNortheasternUniversityFebruary2003IVTCP/IPTCP/IPTCP/IPuC/OS-IITCP/IPIPARPUDPTCP/IPIPIPARPUDPUDPTCP/IPTCP/IPuC/OS-IIAbstractVResearchandImplementationofEmbeddedTCP/IPAbstractTheembeddedsystemhasbecomeanewcomerinthefieldofcomputer.Meanwhile,moreandmoreembeddedproductsrequiretheabilitytoaccesstheInternet.Atpresent,TCP/IPisthekeytechnologyinthenetworkcommunication,whichisthenecessaryprotocolwhenwecommunicatethroughInternet.Undoubtedly,ItisveryvaluabletodeveloptheinformationproducttoresearchandgraspthetechnologyofTCP/IPintheembeddedsystem.Inthedissertation,thefundamentalconcept,systemstructure,applicationandprospectivetrendoftheembeddedsystemwillbeintroduced.TheemphasisistostudytheresearchandimplementationofIP,ARPandUDPinTCP/IPbasedontheembeddedreal-timeoperatingsystem(RTOS)uC/OS-II.Theideathatusingtheuniversalinterfacelayerbetweentheoperatingsystemandtheprotocolsoftwareisproposed,whichimprovesthetransplantabilityofthesoftware.TCP/IPisacomplicatedfamilyofprotocolsandIPisitscenter.IPisdesignedtorunasanisolatedprocess,whichperformthefunctiontoinput,outputandroutethedatagrams.Routingtableadoptsthestructureofbuckethashing,sothespeedtoqueryroutingisveryhigh.ThetaskofARPistoaccomplishtheaddressconversionbetweenthenetworkaddressandphysicaladdress.Inordertoimprovetheefficiencyoftheconversion,thetechnologyofcacheisproposed.ThedissertationdiscussesthemethodsoftheimplementationofUDPportandcalculatingchecksum.Theimportantdatastructuresandproceduresarealsoexplained.Finally,thedissertationintroducestheapplicationoftheembeddedTCP/IPontheintelligenttelephoneterminalandthefieldbus.Keyword:EmbeddedSystem,TCP/IP,uC/OS-II,IntelligentTelephoneTerminal,FieldbusVI....................................................................................................................IVAbstract..............................................................................................................V....................................................................................................................VI......................................................................................................11.1..............................................................................................................11.2..........................................................................................................11.3..........................................................................................................2...........................................................................................32.1...................................................................................................32.2...................................................................................................32.2.1............................................................................................42.2.2........................................................................................42.3...............................................................................................52.4...............................................................................................62.5.......................................................................................62.6uC/OS-II...................................................................7TCP/IP...........................................................................103.1TCP/IP........................................................................................103.1.1......................................................................................103.1.2TCP/IP.............................................................103.1.3TCP/IPIPv6...................................................................113.2TCP/IP............................................................................................123.2.1..................................................................................123.2.2......................................................................................133.2.3OSITCP/IP.................................................................................133.3IP...............................................................................................................153.3.1..........................................................................................153.3.2..........................................................................................16VII3.3.3..................................................................................................173.4ARP.............................................................183.4.1ARP.............................................................................................183.4.2ARP..................................................................................183.4.3ARP..............