}
function ip2int(ip) {
- for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x])
+ for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x])
return ret
}
return ret
}
+function compl32(v) {
+ ret=xor(v, 0xffffffff)
+ return ret
+}
+
BEGIN {
- ipaddr=ip2int(ARGV[1])
- netmask=ip2int(ARGV[2])
+ slpos=index(ARGV[1],"/")
+ if (slpos == 0) {
+ ipaddr=ip2int(ARGV[1])
+ netmask=ip2int(ARGV[2])
+ } else {
+ ipaddr=ip2int(substr(ARGV[1],0,slpos-1))
+ netmask=compl32(2**(32-int(substr(ARGV[1],slpos+1)))-1)
+ ARGV[4]=ARGV[3]
+ ARGV[3]=ARGV[2]
+ }
+
network=and(ipaddr,netmask)
- broadcast=or(network,compl(netmask))
-
- start=or(network,and(ip2int(ARGV[3]),compl(netmask)))
+ broadcast=or(network,compl32(netmask))
+
+ start=or(network,and(ip2int(ARGV[3]),compl32(netmask)))
limit=network+1
if (start<limit) start=limit
-
+
end=start+ARGV[4]
- limit=or(network,compl(netmask))-1
+ limit=or(network,compl32(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))
-
+ print "PREFIX="32-bitcount(compl32(netmask))
+
# range calculations:
# ipcalc <ip> <netmask> <start> <num>
-
+
if (ARGC > 3) {
print "START="int2ip(start)
print "END="int2ip(end)