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| author | Eric Dumazet <dada1@cosmosbay.com> | 2009-03-25 17:31:52 +0100 |
|---|---|---|
| committer | Patrick McHardy <kaber@trash.net> | 2009-03-25 17:31:52 +0100 |
| commit | b8dfe498775de912116f275680ddb57c8799d9ef (patch) | |
| tree | 0472ffb18e0354deedc37bcab8c7d9bb4a2941bb /net/ipv6/netfilter | |
| parent | 78f3648601fdc7a8166748bbd6d0555a88efa24a (diff) | |
| download | linux-b8dfe498775de912116f275680ddb57c8799d9ef.tar.gz linux-b8dfe498775de912116f275680ddb57c8799d9ef.tar.bz2 linux-b8dfe498775de912116f275680ddb57c8799d9ef.zip | |
netfilter: factorize ifname_compare()
We use same not trivial helper function in four places. We can factorize it.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv6/netfilter')
| -rw-r--r-- | net/ipv6/netfilter/ip6_tables.c | 23 |
1 files changed, 2 insertions, 21 deletions
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index 34af7bb8df5f..e59662b3b5b9 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -89,25 +89,6 @@ ip6t_ext_hdr(u8 nexthdr) (nexthdr == IPPROTO_DSTOPTS) ); } -static unsigned long ifname_compare(const char *_a, const char *_b, - const unsigned char *_mask) -{ - const unsigned long *a = (const unsigned long *)_a; - const unsigned long *b = (const unsigned long *)_b; - const unsigned long *mask = (const unsigned long *)_mask; - unsigned long ret; - - ret = (a[0] ^ b[0]) & mask[0]; - if (IFNAMSIZ > sizeof(unsigned long)) - ret |= (a[1] ^ b[1]) & mask[1]; - if (IFNAMSIZ > 2 * sizeof(unsigned long)) - ret |= (a[2] ^ b[2]) & mask[2]; - if (IFNAMSIZ > 3 * sizeof(unsigned long)) - ret |= (a[3] ^ b[3]) & mask[3]; - BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long)); - return ret; -} - /* Returns whether matches rule or not. */ /* Performance critical - called for every packet */ static inline bool @@ -138,7 +119,7 @@ ip6_packet_match(const struct sk_buff *skb, return false; } - ret = ifname_compare(indev, ip6info->iniface, ip6info->iniface_mask); + ret = ifname_compare_aligned(indev, ip6info->iniface, ip6info->iniface_mask); if (FWINV(ret != 0, IP6T_INV_VIA_IN)) { dprintf("VIA in mismatch (%s vs %s).%s\n", @@ -147,7 +128,7 @@ ip6_packet_match(const struct sk_buff *skb, return false; } - ret = ifname_compare(outdev, ip6info->outiface, ip6info->outiface_mask); + ret = ifname_compare_aligned(outdev, ip6info->outiface, ip6info->outiface_mask); if (FWINV(ret != 0, IP6T_INV_VIA_OUT)) { dprintf("VIA out mismatch (%s vs %s).%s\n", |