68 lines
2.4 KiB
Groff
68 lines
2.4 KiB
Groff
.\" $NetBSD: rump.dhcpclient.1,v 1.4 2021/09/16 21:29:42 andvar Exp $
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.\"
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.\" Copyright (c) 2011 Antti Kantee. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd January 20, 2011
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.Dt RUMP.DHCPCLIENT 1
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.Os
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.Sh NAME
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.Nm rump.dhcpclient
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.Nd simple dhcp client for rump kernels
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.Sh SYNOPSIS
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.Nm
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.Ar ifname
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.Sh DESCRIPTION
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The
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.Nm
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utility is a very simple DHCP client which can be used to apply
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networking configuration on one interface in a rump kernel.
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Unlike full DHCP clients,
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.Nm
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does not store leases or renew expired leases.
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The reason for this is the typical transient nature of a rump kernel.
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Additionally,
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.Nm
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does not save DNS resolver information.
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.Pp
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After having successfully configured networking,
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.Nm
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prints out the networking configuration and lease time and exits.
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.Pp
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Since
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.Nm
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uses
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.Xr bpf 4
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to send and receive raw network packets, the server must include
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support for bpf and vfs (for opening
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.Pa /dev/bpf ) .
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Otherwise, the following diagnostic message is printed:
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.Bd -literal -offset indent
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rump.dhcpclient: bpf: Function not implemented
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.Ed
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.Sh SEE ALSO
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.Xr rump_server 1 ,
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.Xr bpf 4
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.Sh CAVEATS
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There is no easy way to release a lease.
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