[Is ipaddress in network?]

Thank you very much!

besides two typos in the function signature, you're code works perfectly.
I rarely have use for bitwise operators, but I do understand your solution and it is very nice and fast.


cheers,


node142e4

[Is ipaddress in network?]

Hello All,

I am trying to determine if an ip-address with a notation like 192.168.1.312
is in a network described with a notation like this 192.168.1.0/22

I use an online tool IP calculator from
[a href=\"http://jodies.de/ipcalc?host=192.168.1.0&mask1=22&mask2=\" target=\"_blank\"]http://jodies.de/ipcalc?host=192.168.1.0&mask1=22&mask2=[/a]
this is the output:
[code]
Address:   192.168.1.0           11000000.10101000.000000 01.00000000
Netmask:   255.255.252.0 = 22    11111111.11111111.111111 00.00000000
Wildcard:  0.0.3.255             00000000.00000000.000000 11.11111111
=>
Network:   192.168.0.0/22        11000000.10101000.000000 00.00000000 (Class C)
Broadcast: 192.168.3.255         11000000.10101000.000000 11.11111111
HostMin:   192.168.0.1           11000000.10101000.000000 00.00000001
HostMax:   192.168.3.254         11000000.10101000.000000 11.11111110
Hosts/Net: 1022                  (Private Internet)
[/code]

This shows that my example ip address is indeed in the network.
To do this dynamically, all I can think of now is to put all 1022 ipaddresses in my db, and do a select where ... query.
There must be a better way.

Thanks very much in advance for any help or suggestions,


node142e4