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Top Forums Shell Programming and Scripting Shell script to give broadcast and network address Post 302463828 by DGPickett on Monday 18th of October 2010 02:12:40 PM
Old 10-18-2010
Isn't the ip address the network address?

Last I checked, the broadcast address = ~netmask | ip (top address), although sometime I think netmask & ip would also work (bottom address), yup, it does.

Can you call executables, or run somethng earlier to make it easy to pick up, like from the environment?
 

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IPCALC(1)								RH								 IPCALC(1)

NAME
ipcalc - perform simple manipulation of IP addresses SYNOPSIS
ipcalc [OPTION]... <IP address>[/prefix] [netmask] DESCRIPTION
ipcalc provides a simple way to calculate IP information for a host. The various options specify what information ipcalc 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. OPTIONS
-b, --broadcast Display the broadcast address for the given IP address and netmask. -h, --hostname Display the hostname for the given IP address. -m, --netmask 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 net- works do not use the default netmasks, in which case an inappropriate value will be returned. -p, --prefix Show the prefix for the given mask/IP address. -n, --network Display the network address for the given IP address and netmask. -s, --silent Don't ever display error messages. AUTHORS
Erik Troan <ewt@redhat.com> Preston Brown <pbrown@redhat.com> REPORTING BUGS
Report bugs to our bugtracking system: http://bugzilla.redhat.com/bugzilla. COPYRIGHT
Copyright (C) 1997-2001 Red Hat, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
ipcalc(3) Red Hat, Inc. April 30 2001 IPCALC(1)
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