<message>
</message>
Dear

I develop a tool that change the network settings in /etc/network/interfaces

the config file must be
iface eth0 inet static
address 192.168.xx.xx
netmask 255.255.255.0
network 192.168.xx.0
broadcast 192.168.xx.255
gateway 192.168.xx.xx

In this case when user type 10.1.1.2 and 255.255.0.0 i need to calculate the network address and broadcast.

Where can i found a function that return the good answer ? Is there somebody has developped a such function ?

The network IP and the broadcast address are usually determined by your IT department if they are static addresses or automatically assigned by the DHCP server on your network, if one is present.

Robert Wolfe, MCSE/RHCE,
Survey Research and Data Acquisition Resource
Department of Health Behavior; Roswell Park Cancer Institute

________________________________

2006/10/12, TOUZEAU DAVID :

For a class b network (based on your mask) that would be 10.1.255.255 for the broadcast and probably be 10.1.0.0 (?) for the network. More info there: http://en.wikipedia.org/wiki/Broadcast_address

But all this is good for private networks only.

Hope this helps;
Best regards.

<message>
</message>

Dear

The tool is designed to simplify the change network settings quickly.

So the goal for the admin is to type:

#./tool 192.168.1.2 255.255.255.0 192.168.1.1

and the tool will change settings in /etc/network/interfaces by

iface eth0 inet static
address 192.168.1.2
netmask 255.255.255.0
network 192.168.xx.0
broadcast 192.168.xx.255
gateway 192.168.1.1

And set /etc/ini.d/networking reload.

Just need this.

best regards

Use the sockets unit:

Var
  sa,sn,nw,bc : string;
  A,N : cardinal;
  IA : in_addr; // in sockets unit.
a:=StrToHostAddr(sa).s_addr;  // Get IP in longint
n:=StrToHostAddr(sn).s_addr;  // Get Netmask in longint.
nw:=a and N;                  // Network.
bc:=A and not N;              // broadcast
ia.s_addr:=a and N;           // Calculate network
nw:=HostAddrToStr(ia);        // Convert to string
ia.s_addr:=a and not N;       // Calculate broadcast
bc:=HostAddrToStr(ia);        // Convert to string.

Michael.

This should be
ia.s_addr:=a or not N;

My apologies.

<message>
</message>
Excuse me Michael for this late....

Your answers are very good and answer to my need..Many many thanks

for others :
-----------------------
use Sockets;
../..
var
    A,N : cardinal;   IA : in_addr;ib : in_addr;
  begin
  a:=StrToHostAddr('10.1.1.34').s_addr;  // Get IP in longint
  n:=StrToHostAddr('255.255.0.0').s_addr;
  ia.s_addr:=a and n;
  writeln('Network ->',HostAddrToStr(ia));
  ia.s_addr:=a or not n;
   writeln('broadcast ->',HostAddrToStr(ia));