# SPDX-License-Identifier: GPL-2.0-only
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#
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# SLIP network device configuration
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#
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config SLIP
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tristate "SLIP (serial line) support"
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depends on TTY
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help
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Say Y if you intend to use SLIP or CSLIP (compressed SLIP) to
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connect to your Internet service provider or to connect to some
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other local Unix box or if you want to configure your Linux box as a
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Slip/CSlip server for other people to dial in. SLIP (Serial Line
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Internet Protocol) is a protocol used to send Internet traffic over
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serial connections such as telephone lines or null modem cables;
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nowadays, the protocol PPP is more commonly used for this same
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purpose.
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Normally, your access provider has to support SLIP in order for you
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to be able to use it, but there is now a SLIP emulator called SLiRP
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around (available from
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<ftp://ibiblio.org/pub/Linux/system/network/serial/>) which
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allows you to use SLIP over a regular dial up shell connection. If
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you plan to use SLiRP, make sure to say Y to CSLIP, below. The
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NET-3-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>, explains how to
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configure SLIP. Note that you don't need this option if you just
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want to run term (term is a program which gives you almost full
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Internet connectivity if you have a regular dial up shell account on
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some Internet connected Unix computer. Read
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<http://www.bart.nl/~patrickr/term-howto/Term-HOWTO.html>). SLIP
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support will enlarge your kernel by about 4 KB. If unsure, say N.
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To compile this driver as a module, choose M here. The module
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will be called slip.
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config SLHC
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tristate
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help
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This option enables Van Jacobsen serial line header compression
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routines.
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if SLIP
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config SLIP_COMPRESSED
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bool "CSLIP compressed headers"
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depends on SLIP
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select SLHC
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help
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This protocol is faster than SLIP because it uses compression on the
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TCP/IP headers (not on the data itself), but it has to be supported
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on both ends. Ask your access provider if you are not sure and
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answer Y, just in case. You will still be able to use plain SLIP. If
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you plan to use SLiRP, the SLIP emulator (available from
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<ftp://ibiblio.org/pub/Linux/system/network/serial/>) which
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allows you to use SLIP over a regular dial up shell connection, you
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definitely want to say Y here. The NET-3-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>, explains how to configure
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CSLIP. This won't enlarge your kernel.
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config SLIP_SMART
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bool "Keepalive and linefill"
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depends on SLIP
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help
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Adds additional capabilities to the SLIP driver to support the
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RELCOM line fill and keepalive monitoring. Ideal on poor quality
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analogue lines.
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config SLIP_MODE_SLIP6
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bool "Six bit SLIP encapsulation"
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depends on SLIP
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help
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Just occasionally you may need to run IP over hostile serial
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networks that don't pass all control characters or are only seven
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bit. Saying Y here adds an extra mode you can use with SLIP:
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"slip6". In this mode, SLIP will only send normal ASCII symbols over
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the serial device. Naturally, this has to be supported at the other
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end of the link as well. It's good enough, for example, to run IP
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over the async ports of a Camtec JNT Pad. If unsure, say N.
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endif # SLIP
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