38 lines
880 B
Bash
Executable File
38 lines
880 B
Bash
Executable File
#!/bin/sh
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# find at least N ip which is not contain 'gateway'
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awk -f - $* <<EOF
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function bitcount(c) {
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c=and(rshift(c, 1),0x55555555)+and(c,0x55555555)
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c=and(rshift(c, 2),0x33333333)+and(c,0x33333333)
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c=and(rshift(c, 4),0x0f0f0f0f)+and(c,0x0f0f0f0f)
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c=and(rshift(c, 8),0x00ff00ff)+and(c,0x00ff00ff)
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c=and(rshift(c,16),0x0000ffff)+and(c,0x0000ffff)
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return c
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}
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function ip2int(ip) {
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for (ret=0,n=split(ip,a,"\."),x=1;x<=n;x++) ret=or(lshift(ret,8),a[x])
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return ret
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}
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function int2ip(ip,ret,x) {
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ret=and(ip,255)
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ip=rshift(ip,8)
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for(;x<3;ret=and(ip,255)"."ret,ip=rshift(ip,8),x++);
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return ret
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}
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BEGIN {
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#next_net <anchor_ip> <gateway> <count_N>
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anchor = ip2int(ARGV[1])
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gateway = ip2int(ARGV[2])
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if ( gateway > anchor )
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up = gateway
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else
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up = anchor
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for (i = 1; i <= ARGV[3]; i++)
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print int2ip(up + 256 * i)
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}
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EOF
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