getBroadcastAddressOctet ( Ip4Octet ; SubnetOctet )

Returns Broadcast Address Octet given Ip4 Octet and Subnet Mask Octet

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John Ahearn
none (yet)
http://none.com

Sample input:

getBroadcastAddressOctet ( 8, 255 )

getBroadcastAddressOctet ( 8, 254 )

getBroadcastAddressOctet ( 8, 252 )

Sample output:

8

9

11

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/* 
	This function determins the broadcast octet of a given IP4 Octet and Subnet Octet.
     	The goal is to find the last possible address within a given subnet that corresponds to the inputted IP address.
     	Any IP4 address that is within range of the desired subnet address is required, this can be a valid IP or the subnet address itself.

jahearn at gmail dot com

*/    

Case (
 
	SubnetOctet = 255 ; IpOctet;
	SubnetOctet = 254 ; 1 + (Int ( IpOctet / 2 ) * 2);
	SubnetOctet = 252 ; 3 + (Int ( IpOctet / 4 ) * 4);
	SubnetOctet = 248 ; 7 + (Int ( IpOctet / 8 ) * 8);
	SubnetOctet = 240 ; 15 + (Int ( IpOctet / 16 ) * 16);
	SubnetOctet = 224 ; 31 + (Int ( IpOctet / 32 ) * 32);
	SubnetOctet = 192 ; 63 + (Int ( IpOctet / 64 ) * 64);
	SubnetOctet = 128 ;127 + (Int ( IpOctet / 128 ) * 128);
	SubnetOctet = 0; 255
     )

This function determins the broadcast octet of a given IP4 Octet and Subnet Octet.
The goal is to find the last possible address within a given subnet that corresponds to the inputted IP address.
Any IP4 address that is within range of the desired subnet address is required, this can be a valid IP or the subnet address itself.

jahearn at gmail dot com

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

getBroadcastAddressOctet ( Ip4Octet ; SubnetOctet )

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