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