30 lines
569 B
C
30 lines
569 B
C
|
/*
|
||
|
|
* BIRD Library -- IPv4 Address Manipulation Functions
|
||
|
|
*
|
||
|
|
* (c) 1998 Martin Mares <mj@ucw.cz>
|
||
|
|
*
|
||
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "nest/bird.h"
|
||
|
|
#include "lib/ip.h"
|
||
|
|
|
||
|
|
int
|
||
|
|
ipv4_classify(u32 a)
|
||
|
|
{
|
||
|
|
u32 b = a >> 24U;
|
||
|
|
|
||
|
|
if (b && b <= 0xdf)
|
||
|
|
{
|
||
|
|
if (b == 0x7f)
|
||
|
|
return IADDR_HOST | SCOPE_HOST;
|
||
|
|
else
|
||
|
|
return IADDR_HOST | SCOPE_UNIVERSE;
|
||
|
|
}
|
||
|
|
if (b >= 0xe0 && b <= 0xef)
|
||
|
|
return IADDR_MULTICAST | SCOPE_UNIVERSE;
|
||
|
|
if (a == 0xffffffff)
|
||
|
|
return IADDR_BROADCAST | SCOPE_LINK;
|
||
|
|
return IADDR_INVALID;
|
||
|
|
}
|