.TH IPCALC 1 "April 30 2001" "Red Hat, Inc." \" -*- nroff -*-
.SH NAME
ipcalc \- perform simple manipulation of IP addresses
.SH SYNOPSIS
.B ipcalc
[\fIOPTION\fR]... <\fBIP address\fR>[\fI/prefix\fR] [\fInetmask\fR]

.SH DESCRIPTION
\fBipcalc\fR provides a simple way to calculate IP information for a host.
The various options specify what information \fBipcalc\fR should display
on standard out. Multiple options may be specified.  An IP address to
operate on must always be specified.  Most operations also require a
netmask or a CIDR prefix as well.

.SH OPTIONS
.TP
.TP
\fB\-c\fR, \fB\-\-check\fR
Validate the IP address under the specified family.  If no address
family is specified, IPv4 is assumed.

.TP
\fB\-4\fR, \fB\-\-ipv4\fR
Specify IPv4 address family (default).

.TP
\fB\-6\fR, \fB\-\-ipv6\fR
Specify IPv6 address family.

.TP
\fB\-b\fR, \fB\-\-broadcast\fR
Display the broadcast address for the given IP address and netmask.

.TP
\fB\-h\fR, \fB\-\-hostname\fR
Display the hostname for the given IP address.

.TP
\fB\-m\fR, \fB\-\-netmask\fR
Calculate the netmask for the given IP address. It assumes that the IP
address is in a complete class A, B, or C network. Many networks do
not use the default netmasks, in which case an inappropriate value will
be returned.

.TP
\fB\-p\fR, \fB\-\-prefix\fR
Show the prefix for the given mask/IP address.

.TP
\fB\-n\fR, \fB\-\-network\fR 
Display the network address for the given IP address and netmask.

.TP
\fB\-s\fR, \fB\-\-silent\fR 
Don't ever display error messages.

.SH AUTHORS
.nf
Erik Troan <ewt@redhat.com>
.nf
Preston Brown <pbrown@redhat.com>

.TP
IPv6 supported wedged in by David Cantrell <dcantrell@redhat.com>
.fi
.SH "REPORTING BUGS"
Report bugs at http://bugzilla.redhat.com/
.SH COPYRIGHT
Copyright \(co 1997-2008 Red Hat, Inc.
.br
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE.