base-files: ipcalc.sh: fix broken calculations on 64bit systems

Calculate complements by using awk's xor() function with a mask of 0xffffffff
instead of relying on the compl() function which appears to produce broken
results on certain 64bit architectures.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34875 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/base-files/files/bin/ipcalc.sh b/package/base-files/files/bin/ipcalc.sh
index d6ef168..7463d6b 100755 (executable)
--- a/package/base-files/files/bin/ipcalc.sh
+++ b/package/base-files/files/bin/ipcalc.sh
@@ -22,6 +22,11 @@ function int2ip(ip,ret,x) {
        return ret
 }
 
+function compl32(v) {
+       ret=xor(v, 0xffffffff)
+       return ret
+}
+
 BEGIN {
        slpos=index(ARGV[1],"/")
        if (slpos == 0) {
@@ -29,27 +34,27 @@ BEGIN {
                netmask=ip2int(ARGV[2])
        } else {
                ipaddr=ip2int(substr(ARGV[1],0,slpos-1))
-               netmask=compl(2**(32-int(substr(ARGV[1],slpos+1)))-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))
+       broadcast=or(network,compl32(netmask))
 
-       start=or(network,and(ip2int(ARGV[3]),compl(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>