bird/lib/ipv4.c
Martin Mares 25697773b5 The library is now glued together from generic and OS-dependent parts
by the `mergedirs' script. Few more IP address manipulation functions
and some fixes.
1998-05-15 07:56:13 +00:00

33 lines
591 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.
*/
#ifndef IPV6
#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;
}
#endif