shithub: riscv

ref: 094fc8b15f98807833143e29f1f7d36a1ca4b28c
dir: /sys/man/8/trampoline/

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.TH TRAMPOLINE 8
.SH NAME
trampoline \- forward incoming calls to another address
.SH SYNOPSIS
.B aux/trampoline
[
.B -9
]
[
.B -a
.I altaddr
]
[
.B -m
.I netdir
]
.I addr
.SH DESCRIPTION
.I Trampoline
can be used in a service file (see
.IR listen (8))
to link an incoming call to
another address that provides the service, typically on another machine.
.PP
.I Trampoline
dials
.I addr
and copies data between that connection
and its own standard input and output.
.PP
The options are:
.TP
.B -9
The connection carries only 9P messages.  In this case
.I trampoline
will relay whole messages at a time.
.TP
.BI -a " altaddr
Dial
.I altaddr
and relay between the two network connections,
ignoring standard input and output.
.TP
.BI -m " netdir
Restrict forwarding to particular machines.
.I Netdir
must be the incoming call directory.
.I Trampoline
finds the caller's MAC address
.I m
and checks that
.IR ndb (6)
contains an entry with
.BI ether= m
and the attribute
.BR trampok .
If no such entry is found, the call is rejected.
.PD
.SH FILES
.TF /sys/log/trampoline
.TP
.B /sys/log/trampoline
logs rejected calls
.SH SOURCE
.B /sys/src/cmd/aux/trampoline.c
.SH SEE ALSO
.IR dial (2),
.IR listen (8)