25 lines
429 B
C
25 lines
429 B
C
/*
|
|
* netof - return the net address part of an ip address
|
|
* (zero out host part)
|
|
*/
|
|
#include <stdio.h>
|
|
|
|
#include "ntp_fp.h"
|
|
#include "ntp_stdlib.h"
|
|
|
|
u_long
|
|
netof(num)
|
|
u_long num;
|
|
{
|
|
register u_long netnum;
|
|
|
|
netnum = num;
|
|
if(IN_CLASSC(netnum))
|
|
netnum &= IN_CLASSC_NET;
|
|
else if (IN_CLASSB(netnum))
|
|
netnum &= IN_CLASSB_NET;
|
|
else /* treat all other like class A */
|
|
netnum &= IN_CLASSA_NET;
|
|
return netnum;
|
|
}
|