[backfire] merge r26930

[openwrt-10.03/.git] / 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 318980e5a25f25de5cc53d065faf8571228af8a6..0cd6e14f09f7ea92c9b6db72fca936787cb0731f 100755 (executable)
--- a/package/base-files/files/bin/ipcalc.sh
+++ b/package/base-files/files/bin/ipcalc.sh
@@ -2,15 +2,24 @@
 
 awk -f /usr/lib/common.awk -f - $* <<EOF
 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
@@ -20,10 +29,10 @@ 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)