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Diffstat (limited to 'package/base-files/files/bin/ipcalc')
-rwxr-xr-x | package/base-files/files/bin/ipcalc | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/package/base-files/files/bin/ipcalc b/package/base-files/files/bin/ipcalc new file mode 100755 index 000000000..e8efa6b96 --- /dev/null +++ b/package/base-files/files/bin/ipcalc @@ -0,0 +1,32 @@ +#!/bin/sh + +awk -f /usr/lib/common.awk -f - $* <<EOF +BEGIN { + ipaddr=ip2int(ARGV[1]) + netmask=ip2int(ARGV[2]) + network=and(ipaddr,netmask) + broadcast=or(network,compl(netmask)) + + start=or(network,and(ip2int(ARGV[3]),compl(netmask))) + limit=network+1 + if (start<limit) start=limit + + end=start+ARGV[4] + limit=or(network,compl(netmask))-1 + if (end>limit) end=limit + + print "IP="int2ip(ipaddr) + print "NETMASK="int2ip(netmask) + print "BROADCAST="int2ip(broadcast) + print "NETWORK="int2ip(network) + print "PREFIX="32-bitcount(compl(netmask)) + + # range calculations: + # ipcalc <ip> <netmask> <start> <num> + + if (ARGC > 3) { + print "START="int2ip(start) + print "END="int2ip(end-1) + } +} +EOF |