dlb, dlpi - STREAMS pseudodevice driver for bridging BSD Drivers to
#include <sys/dlpihdr.h> #include <fcntl.h> fd = open
("/dev/streams/dlb", O_RDWR, 0);
The dlb STREAMS pseudodevice driver provides a communication path
between BSD-style device drivers and STREAMS protocol stacks. The dlb
STREAMS pseudodevice driver is the Stream end in a Stream that communi‐
cates with BSD-based device drivers.
When the /dev/streams/dlb character device is open, a Stream is con‐
structed between a Stream head and the dlb pseudodevice driver. After
the Stream that is intended to communicate with the BSD-based driver or
drivers is created, the protocol module or modules can be pushed onto
Tru64 UNIX supports a subset of the Data Link Provider Interface (DLPI)
connectionless mode of communication. The attach DLPI primitive is
required to associate a particular physical point of attachment (PPA)
with a Stream in Tru64 UNIX's implementation of the style 2 provider.
On the write side, the dlb pseudodevice driver translates connection‐
less style 2 DLPI messages to the appropriate BSD ifnet interface mes‐
sages. On the read side, the user-bound Service Access Point (SAP)
messages received from a selected PPA over BSD based driver or drivers
are sent upstream.
Network Programmer's Guide
Data Link Provider Interface specification in