subnet masks etc..........

[vgersh99]

logic:
1. given a subnet address and a mask [192.9.111.0 and 255.255.255.224]
2. and an address [(a) 192.9.111.1 OR (b) 192.9.111.50]
3. determine if (a) belongs to a subnet specified in 1.
[whereas (b) does NOT]

Say if I have a file subnets.txt
#subnet | mask
192.9.111.0|255.255.255.224
192.9.111.0|255.255.255.192


(a) will be validated by the FIRST record/row
(b) will be validated by the SECOND record/row


Anyone have any leads/tips or snippets I could elaborate on?!
vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[marsd]

Hope this gives you an idea, you have plenty of skill to
fill in the blanks..

function hpn(add, arr,x) {
gsub(/255\./,&quot;&quot;,add)
x = split(add,arr,&quot;.&quot
if (x == 2) {
start = (256 - arr[1])
return (start * 256 - 2)
} else if (x == 1) {
return (256 - arr[1] - 2)
}
return &quot;FAIL&quot;
}

Based on the last octet value of $1 + last octet of host address. Will it fit under the math returned by the function given $2?
If so you have a winner.

example:
nval = function($1)
hrng = function(host) + nval
if (hrng <= hpn($2)) {
print 1
} else {
print 0
}
etc...


HTH