drivers/net/ppp/Kconfig

Source file repositories/reference/linux-study-clean/drivers/net/ppp/Kconfig

File Facts

System
Linux kernel
Corpus path
drivers/net/ppp/Kconfig
Extension
[no extension]
Size
6830 bytes
Lines
208
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: build/configuration rule
Status
atlas-only

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only
#
# PPP network device configuration
#

config PPP
	tristate "PPP (point-to-point protocol) support"
	select SLHC
	help
	  PPP (Point to Point Protocol) is a newer and better SLIP.  It serves
	  the same purpose: sending Internet traffic over telephone (and other
	  serial) lines.  Ask your access provider if they support it, because
	  otherwise you can't use it; most Internet access providers these
	  days support PPP rather than SLIP.

	  To use PPP, you need an additional program called pppd, available at
	  <https://ppp.samba.org>.  Make sure that you have the version of pppd
	  recommended in <file:Documentation/Changes>.
	  The PPP option enlarges your kernel by about 16 KB.

	  There are actually two versions of PPP: the traditional PPP for
	  asynchronous lines, such as regular analog phone lines, and
	  synchronous PPP which can be used over digital ISDN lines for
	  example.  If you want to use PPP over phone lines or other
	  asynchronous serial lines, you need to say Y (or M) here and also to
	  the next option, "PPP support for async serial ports".  For PPP over
	  synchronous lines, you should say Y (or M) here and to "Support
	  synchronous PPP", below.

	  If you said Y to "Version information on all symbols" above, then
	  you cannot compile the PPP driver into the kernel; you can then only
	  compile it as a module. To compile this driver as a module, choose M
	  here. The module will be called ppp_generic.

if PPP

config PPP_BSDCOMP
	tristate "PPP BSD-Compress compression"
	help
	  Support for the BSD-Compress compression method for PPP, which uses
	  the LZW compression method to compress each PPP packet before it is
	  sent over the wire. The machine at the other end of the PPP link
	  (usually your ISP) has to support the BSD-Compress compression
	  method as well for this to be useful. Even if they don't support it,
	  it is safe to say Y here.

	  The PPP Deflate compression method ("PPP Deflate compression",
	  above) is preferable to BSD-Compress, because it compresses better
	  and is patent-free.

	  Note that the BSD compression code will always be compiled as a
	  module; it is called bsd_comp and will show up in the directory
	  modules once you have said "make modules". If unsure, say N.

config PPP_DEFLATE
	tristate "PPP Deflate compression"
	select ZLIB_INFLATE
	select ZLIB_DEFLATE
	help
	  Support for the Deflate compression method for PPP, which uses the
	  Deflate algorithm (the same algorithm that gzip uses) to compress
	  each PPP packet before it is sent over the wire.  The machine at the
	  other end of the PPP link (usually your ISP) has to support the
	  Deflate compression method as well for this to be useful.  Even if
	  they don't support it, it is safe to say Y here.

	  To compile this driver as a module, choose M here.

config PPP_FILTER
	bool "PPP filtering"

Annotation

Implementation Notes