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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
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@ -22,6 +22,11 @@ function int2ip(ip,ret,x) {
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return ret
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}
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function compl32(v) {
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ret=xor(v, 0xffffffff)
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return ret
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}
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BEGIN {
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slpos=index(ARGV[1],"/")
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if (slpos == 0) {
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@ -29,27 +34,27 @@ BEGIN {
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netmask=ip2int(ARGV[2])
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} else {
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ipaddr=ip2int(substr(ARGV[1],0,slpos-1))
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netmask=compl(2**(32-int(substr(ARGV[1],slpos+1)))-1)
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netmask=compl32(2**(32-int(substr(ARGV[1],slpos+1)))-1)
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ARGV[4]=ARGV[3]
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ARGV[3]=ARGV[2]
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}
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network=and(ipaddr,netmask)
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broadcast=or(network,compl(netmask))
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broadcast=or(network,compl32(netmask))
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start=or(network,and(ip2int(ARGV[3]),compl(netmask)))
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start=or(network,and(ip2int(ARGV[3]),compl32(netmask)))
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limit=network+1
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if (start<limit) start=limit
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end=start+ARGV[4]
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limit=or(network,compl(netmask))-1
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limit=or(network,compl32(netmask))-1
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if (end>limit) end=limit
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print "IP="int2ip(ipaddr)
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print "NETMASK="int2ip(netmask)
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print "BROADCAST="int2ip(broadcast)
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print "NETWORK="int2ip(network)
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print "PREFIX="32-bitcount(compl(netmask))
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print "PREFIX="32-bitcount(compl32(netmask))
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# range calculations:
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# ipcalc <ip> <netmask> <start> <num>
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