asyhdlc(ADMP)
asyhdlc --
asynchronous High-level Data Link Control (HDLC) protocol module
Description
The asyhdlc module is part of the STREAMS protocol
stack used for PPP connections.
pppd(ADMN)
pushes asyhdlc onto the
mbcl(ADMP)
driver.
mbcl
links the PPP driver with tty lines.
asyhdlc implements part of RFC 1548, one
of the PPP protocol standards.
A PPP HDLC packet lacks a CRC checksum
and uses a ``transparent code'' for data
transmission. asyhdlc performs the following
functions on PPP datagrams:
-
generates and validates the CRC checksum
-
encodes and decodes packet data to achieve data transparency -- character stuffing
-
generates and strips framing patterns delimiting packet start and end
See
ppp(ADMP)
for additional information about the PPP implementation.
See also
mbcl(ADMP),
ppp(ADMP),
pppd(ADMN)
Standards conformance
asyhdlc is conformant with RFC 1548
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003