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| author | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-04-11 20:17:55 +0900 |
|---|---|---|
| committer | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-04-12 13:43:14 +0900 |
| commit | fed85383ac34d82e96f227ce49ce68117cec23a0 (patch) | |
| tree | 970dacedc8df29cf96511c0fc3e4bc1d103d3055 /include/net/addrconf.h | |
| parent | caad295fed8b652c67159911d11c65d476351d2f (diff) | |
| download | lwn-fed85383ac34d82e96f227ce49ce68117cec23a0.tar.gz lwn-fed85383ac34d82e96f227ce49ce68117cec23a0.zip | |
[IPV6]: Use XOR and OR rather than mutiple ands for ipv6 address comparisons.
ipv6_addr_equal(), ipv6_addr_v4mapped(),
ipv6_addr_is_ll_all_{nodes,routers}(),
ipv6_masked_addr_cmp()
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'include/net/addrconf.h')
| -rw-r--r-- | include/net/addrconf.h | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/include/net/addrconf.h b/include/net/addrconf.h index bdcc863a60a4..1dc9d03372d9 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -240,18 +240,16 @@ static inline int ipv6_addr_is_multicast(const struct in6_addr *addr) static inline int ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) { - return (addr->s6_addr32[0] == htonl(0xff020000) && - addr->s6_addr32[1] == 0 && - addr->s6_addr32[2] == 0 && - addr->s6_addr32[3] == htonl(0x00000001)); + return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | addr->s6_addr32[2] | + (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0); } static inline int ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) { - return (addr->s6_addr32[0] == htonl(0xff020000) && - addr->s6_addr32[1] == 0 && - addr->s6_addr32[2] == 0 && - addr->s6_addr32[3] == htonl(0x00000002)); + return (((addr->s6_addr32[0] ^ htonl(0xff020000)) | + addr->s6_addr32[1] | addr->s6_addr32[2] | + (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0); } static inline int ipv6_isatap_eui64(u8 *eui, __be32 addr) |