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This commit is contained in:
Philippe Charnier 1997-10-13 11:03:36 +00:00
parent 607b525c53
commit aa40a0da51
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=30372
2 changed files with 75 additions and 65 deletions
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127
usr.sbin/rarpd/rarpd.8
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@ -1,4 +1,4 @@
.\" @(#) $Header: /home/ncvs/src/usr.sbin/rarpd/rarpd.8,v 1.4 1996/11/19 23:57:05 wpaul Exp $ (LBL)
.\" @(#) $Id$ (LBL)
.\"
.\" Copyright (c) 1990, 1991, 1993 The Regents of the University of
.\" California. All rights reserved.
@ -19,90 +19,99 @@
.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.TH RARPD 8 "19 Jul 1993"
.SH NAME
rarpd \- Reverse ARP Daemon
.SH SYNOPSIS
.na
.B rarpd
[
.B \-afsv
]
[
.I interface
]
.br
.ad
.SH DESCRIPTION
.LP
.I Rarpd
.Dd July 19, 1993
.Dt RARPD 8
.Os
.Sh NAME
.Nm rarpd
.Nd reverse ARP daemon
.Sh SYNOPSIS
.Nm rarpd
.Op Fl afsv
.Op Ar interface
.Sh DESCRIPTION
.Nm Rarpd
services Reverse ARP requests on the Ethernet connected to
.I interface.
.Ar interface .
Upon receiving a request,
.I rarpd
.Nm
maps the target hardware address to an IP address via its name, which
must be present in both the
.I ethers(5)
.Xr ethers 5
and
.I hosts(5)
.Xr hosts 5
databases.
If a host does not exist in both databases, the translation cannot
proceed and a reply will not be sent.
By default, a request is honored only if the server
(i.e., the host that rarpd is running on)
(i.e., the host that
.Nm
is running on)
can "boot" the target; that is, a file or directory matching the glob
/tftpboot/\fIipaddr\fP*
exists, where \fIipaddr\fP is the target IP address in hex.
.Pa /tftpboot/\fIipaddr\fP*
exists, where
.Em ipaddr
is the target IP address in hex.
For example, the IP address 204.216.27.18 will be replied to if any of
/tftpboot/CCD81B12, /tftpboot/CCD81B12.SUN3, or /tftpboot/CCD81B12-boot
.Pa /tftpboot/CCD81B12 ,
.Pa /tftpboot/CCD81B12.SUN3 ,
or
.Pa /tftpboot/CCD81B12-boot
exist.
This requirement can be overridden with the
.B \-s
.Fl s
flag (see below).
In normal operation,
.I rarpd
.Nm
forks a copy of itself and runs in
the background. Anomalies and errors are reported via
.I syslog(3).
.Xr syslog 3 .
.SH OPTIONS
.LP
.TP
.B \-a
.Sh OPTIONS
The following options are available:
.Bl -tag -width indent
.It Fl a
Listen on all the Ethernets attached to the system.
If `-a' is omitted, an interface must be specified.
.TP
.B \-f
If
.Fl a
is omitted, an interface must be specified.
.It Fl f
Run in the foreground.
.TP
.B \-s
.It Fl s
Supply a response to any RARP request for which an ethernet to IP address
mapping exists; do not depend on the existence of
/tftpboot/\fIipaddr\fP*.
.TP
.B \-v
.Pa /tftpboot/\fIipaddr\fP* .
.It Fl v
Enable verbose sysloging.
.SH FILES
/etc/ethers
.br
/etc/hosts
.br
/tftpboot
.SH SEE ALSO
bpf(4)
.br
.El
.Sh FILES
.Bl -tag -width /etc/ethers -compact
.It Pa /etc/ethers
.It Pa /etc/hosts
.It Pa /tftpboot
.El
.Sh SEE ALSO
.Xr bpf 4
.Pp
RFC 903: Finlayson, R.; Mann, T.; Mogul, J.C.; Theimer, M. Reverse Address
Resolution Protocol. 1984 June; 4 p.
.SH AUTHORS
Craig Leres (leres@ee.lbl.gov) and
Steven McCanne (mccanne@ee.lbl.gov).
.Sh AUTHORS
.An Craig Leres Aq leres@ee.lbl.gov
and
.An Steven McCanne Aq mccanne@ee.lbl.gov .
Lawrence Berkeley Laboratory, University of California, Berkeley, CA.
.SH BUGS
.I rarpd
can depend on the DNS to resolve the name discovered from /etc/ethers.
If this name is not in the DNS but is in /etc/hosts, the DNS lookup
.Sh BUGS
.Nm Rarpd
can depend on the DNS to resolve the name discovered from
.Pa /etc/ethers .
If this name is not in the DNS but is in
.Pa /etc/hosts ,
the DNS lookup
can cause a delayed RARP response, so in this situation it is reccommended to
configure /etc/host.conf to read /etc/hosts first.
configure
.Pa /etc/host.conf
to read
.Pa /etc/hosts
first.

13
usr.sbin/rarpd/rarpd.c
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@ -18,16 +18,17 @@
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
char copyright[] =
static const char copyright[] =
"@(#) Copyright (c) 1990, 1991, 1992, 1993, 1996\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static const char rcsid[] =
"$Id: rarpd.c,v 1.15 1997/02/22 16:12:44 peter Exp $";
#endif
"$Id$";
#endif /* not lint */
/*
* rarpd - Reverse ARP Daemon
@ -154,7 +155,7 @@ int rarp_open __P((char *));
void rarp_process __P((struct if_info *, u_char *, u_int));
void rarp_reply __P((struct if_info *, struct ether_header *, u_long, u_int));
void update_arptab __P((u_char *, u_long));
void usage __P((void));
static void usage __P((void));
static u_char zero[6];
@ -397,10 +398,10 @@ init(target)
ntohl(ii->ii_netmask), eatoa(ii->ii_eaddr));
}
void
static void
usage()
{
(void)fprintf(stderr, "usage: rarpd [ -afnv ] [ interface ]\n");
(void)fprintf(stderr, "usage: rarpd [-afnv] [interface]\n");
exit(1);
}