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base-files: ipcalc.sh: correctly set limit for prefix > 30

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For /31 and /32 prefixes, there are only host addresses - no network and
broadcast address with all-zero and all-one bits.
Reflect this when setting the limit.

Signed-off-by: Leon M. Busch-George <leon@georgemail.eu>
This commit is contained in:
Leon M. Busch-George 2023-06-16 14:56:39 +02:00
parent 9e8bbd4265
commit 9b2f8a33b6
1 changed files with 10 additions and 2 deletions
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12
package/base-files/files/bin/ipcalc.sh
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@ -64,13 +64,21 @@ BEGIN {
if (ARGC <= 3)
exit(0)
if (prefix<=30)
limit=network+1
else
limit=network
start=or(network,and(ip2int(ARGV[3]),compl32(netmask)))
limit=network+1
if (start<limit) start=limit
if (start==ipaddr) start=ipaddr+1
if (prefix<=30)
limit=or(network,compl32(netmask))-1
else
limit=or(network,compl32(netmask))
end=start+ARGV[4]-1
limit=or(network,compl32(netmask))-1
if (end>limit) end=limit
if (end==ipaddr) end=ipaddr-1