HP 800 HP DLPI Programmer's Guide - Page 173

Table 3-1 NOTE DLPI Input/Output Controls Supported ioctls DLS User Feature Bits (Continued) Constant Value Description DRIVER_FASTPA 0x00000200 DLPI user inquires if the driver TH_IN supports inbound fastpath. driver_ops_type_1 This parameter is reserved. You must set this value to 0 (zero). driver_ops_type_2 This parameter is reserved. You must set this value to 0 (zero). State The message is valid in DL_IDLE or DL_UNBOUND. If the message is not in either of these states, DLPI returns ioc_error as EBUSY. New State The resulting state is unchanged. Response If the driver does not support any of the options supported by the transport layer, EOPNOTSUPP is returned. If the associated information is invalid, EINVAL is returned. DL_IOC_HDR_INFO DL_IOC_HDR_INFO permits the transport layer (like TCP/IP) to request a Link Layer header template from DLPI on a per-stream basis, thus avoiding the construction of header every time. This ioctl is valid for in-kernel STREAMS DLPI users only. The header template enables transport layer to add the Link Layer header before sending the packet to DLPI. Chapter 3 173