chp4 接口 以太网.ppt

文档介绍：ProtocolEngineeringwithTCP/IPasanExample西安电子科技大学软件工程研究所刘西洋******@'driver,sinceitisaround1,ode(halfofwhichisconcernedwiththehardwaredetailsofoneparticularinterfacecard),butwedolookatthedevice-,/'stechnicalspecificationsisrequiredtounderstandthedevice-./3,includingtheLANCEdriver,().--'llidentifythefunctionsthathandledeviceinterrupts,,if_done,andif_resetarenevercalledoronlycalledfromdevice-ode(.,leinitiscalleddirectlybyleioctl).,,theLANCEinterfacestructure,,,(IFF_UPisnotset),anasteriskappearsnexttothename