OID的作用是什么?

[sfxiaoqiang]

网络协议驱动编程中需要获取和设置OID,这个OID的作用是什么?

[oLINo]

为了在系统中能够找到所需对象，我们需要为每一个对象分配一个唯一的表示号

[MoXiaoRab]

OID_GEN_SUPPORTED_LIST,
OID_GEN_HARDWARE_STATUS,
OID_GEN_MEDIA_SUPPORTED,
OID_GEN_MEDIA_IN_USE,
OID_GEN_MAXIMUM_LOOKAHEAD,
OID_GEN_MAXIMUM_FRAME_SIZE,
OID_GEN_LINK_SPEED,
OID_GEN_TRANSMIT_BUFFER_SPACE,
OID_GEN_RECEIVE_BUFFER_SPACE,
OID_GEN_TRANSMIT_BLOCK_SIZE,
OID_GEN_RECEIVE_BLOCK_SIZE,
OID_GEN_VENDOR_ID,
OID_GEN_VENDOR_DESCRIPTION,
OID_GEN_CURRENT_PACKET_FILTER,
OID_GEN_CURRENT_LOOKAHEAD,
OID_GEN_DRIVER_VERSION,
OID_GEN_MAXIMUM_TOTAL_SIZE,
OID_GEN_PROTOCOL_OPTIONS,
OID_GEN_MAC_OPTIONS,
OID_GEN_MEDIA_CONNECT_STATUS,
OID_GEN_MAXIMUM_SEND_PACKETS,
OID_GEN_VENDOR_DRIVER_VERSION,
OID_GEN_MEDIA_CAPABILITIES,

OID_GEN_XMIT_OK,
OID_GEN_RCV_OK,
OID_GEN_XMIT_ERROR,
OID_GEN_RCV_ERROR,
OID_GEN_RCV_NO_BUFFER,

OID_802_3_PERMANENT_ADDRESS,
OID_802_3_CURRENT_ADDRESS,
OID_802_3_MULTICAST_LIST,
OID_802_3_MAXIMUM_LIST_SIZE,

OID_802_3_RCV_ERROR_ALIGNMENT,
OID_802_3_XMIT_ONE_COLLISION,
OID_802_3_XMIT_MORE_COLLISIONS,

以上是常见的OID，我这里为楼主列出来

OID就是NDIS Object Identifiers的简称，他是一组系统定义的常数，每一个OID其实就是一个请求的类型号。NDIS的上层驱动可以给下层驱动发送OID请求，就像普通NT驱动中的IRP一样

[sfxiaoqiang]

谢谢Troj4n同志的详细回答!