leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[IPV4]: Create ipv4_is_<type>(__be32 addr) functions

Browse Source 
Change IPV4 specific macros LOOPBACK MULTICAST LOCAL_MCAST BADCLASS
and ZERONET macros to inline functions ipv4_is_<type>(__be32 addr)

Adds type safety and arguably some readability.

Changes since last submission:

Removed ipv4_addr_octets function
Used hex constants
Converted recently added rfc3330 macros

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches 2007-12-16 13:42:49 -08:00 committed by David S. Miller
parent 586f121152
commit 2658fa8031
1 changed files with 74 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
include/linux/in.h
View File

@ -246,21 +246,82 @@ struct sockaddr_in {
#include <asm/byteorder.h>
#ifdef __KERNEL__
/* Some random defines to make it easier in the kernel.. */
#define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
#define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
#define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
#define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000))
#define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
static inline bool ipv4_is_loopback(__be32 addr)
{
return (addr & htonl(0xff000000)) == htonl(0x7f000000);
}
static inline bool ipv4_is_multicast(__be32 addr)
{
return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
}
static inline bool ipv4_is_local_multicast(__be32 addr)
{
return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
}
static inline bool ipv4_is_badclass(__be32 addr)
{
return (addr & htonl(0xf0000000)) == htonl(0xf0000000);
}
static inline bool ipv4_is_zeronet(__be32 addr)
{
return (addr & htonl(0xff000000)) == htonl(0x00000000);
}
#define LOOPBACK(x) ipv4_is_loopback(x)
#define MULTICAST(x) ipv4_is_multicast(x)
#define BADCLASS(x) ipv4_is_badclass(x)
#define ZERONET(x) ipv4_is_zeronet(x)
#define LOCAL_MCAST(x) ipv4_is_local_multicast(x)
/* Special-Use IPv4 Addresses (RFC3330) */
#define PRIVATE_10(x) (((x) & htonl(0xff000000)) == htonl(0x0A000000))
#define LINKLOCAL_169(x) (((x) & htonl(0xffff0000)) == htonl(0xA9FE0000))
#define PRIVATE_172(x) (((x) & htonl(0xfff00000)) == htonl(0xAC100000))
#define TEST_192(x) (((x) & htonl(0xffffff00)) == htonl(0xC0000200))
#define ANYCAST_6TO4(x) (((x) & htonl(0xffffff00)) == htonl(0xC0586300))
#define PRIVATE_192(x) (((x) & htonl(0xffff0000)) == htonl(0xC0A80000))
#define TEST_198(x) (((x) & htonl(0xfffe0000)) == htonl(0xC6120000))
static inline bool ipv4_is_private_10(__be32 addr)
{
return (addr & htonl(0xff000000)) == htonl(0x0a000000);
}
static inline bool ipv4_is_private_172(__be32 addr)
{
return (addr & htonl(0xfff00000)) == htonl(0xac100000);
}
static inline bool ipv4_is_private_192(__be32 addr)
{
return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
}
static inline bool ipv4_is_linklocal_169(__be32 addr)
{
return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
}
static inline bool ipv4_is_anycast_6to4(__be32 addr)
{
return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
}
static inline bool ipv4_is_test_192(__be32 addr)
{
return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
}
static inline bool ipv4_is_test_198(__be32 addr)
{
return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
}
#endif
#define PRIVATE_10(x) ipv4_is_private_10(x)
#define LINKLOCAL_169(x) ipv4_is_linklocal_169(x)
#define PRIVATE_172(x) ipv4_is_private_172(x)
#define TEST_192(x) ipv4_is_test_192(x)
#define ANYCAST_6TO4(x) ipv4_is_anycast_6to4(x)
#define PRIVATE_192(x) ipv4_is_private_192(x)
#define TEST_198(x) ipv4_is_test_198(x)
#endif /* _LINUX_IN_H */