X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/4ab4dc8ed81fbcbe398e9d142096e1876b11a7c0..29791a765cc2ffc02bfdc721f950205669f06c2a:/package/base-files/files/bin/ipcalc.sh

diff --git a/package/base-files/files/bin/ipcalc.sh b/package/base-files/files/bin/ipcalc.sh
index e8efa6b96..d6ef16870 100755
--- a/package/base-files/files/bin/ipcalc.sh
+++ b/package/base-files/files/bin/ipcalc.sh
@@ -1,16 +1,46 @@
 #!/bin/sh
 
-awk -f /usr/lib/common.awk -f - $* <<EOF
+awk -f - $* <<EOF
+function bitcount(c) {
+	c=and(rshift(c, 1),0x55555555)+and(c,0x55555555)
+	c=and(rshift(c, 2),0x33333333)+and(c,0x33333333)
+	c=and(rshift(c, 4),0x0f0f0f0f)+and(c,0x0f0f0f0f)
+	c=and(rshift(c, 8),0x00ff00ff)+and(c,0x00ff00ff)
+	c=and(rshift(c,16),0x0000ffff)+and(c,0x0000ffff)
+	return c
+}
+
+function ip2int(ip) {
+	for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x]) 
+	return ret
+}
+
+function int2ip(ip,ret,x) {
+	ret=and(ip,255)
+	ip=rshift(ip,8)
+	for(;x<3;ret=and(ip,255)"."ret,ip=rshift(ip,8),x++);
+	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=compl(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)))
 	limit=network+1
 	if (start<limit) start=limit
-	
+
 	end=start+ARGV[4]
 	limit=or(network,compl(netmask))-1
 	if (end>limit) end=limit
@@ -20,13 +50,13 @@ BEGIN {
 	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)
+		print "END="int2ip(end)
 	}
 }
 EOF