diff options
Diffstat (limited to 'net/netfilter/xt_physdev.c')
| -rw-r--r-- | net/netfilter/xt_physdev.c | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/net/netfilter/xt_physdev.c b/net/netfilter/xt_physdev.c index 1bcdfc12cf59..8d28ca5848bc 100644 --- a/net/netfilter/xt_physdev.c +++ b/net/netfilter/xt_physdev.c @@ -20,13 +20,13 @@ MODULE_DESCRIPTION("Xtables: Bridge physical device match"); MODULE_ALIAS("ipt_physdev"); MODULE_ALIAS("ip6t_physdev"); + static bool physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par) { - int i; - static const char nulldevname[IFNAMSIZ]; + static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long)))); const struct xt_physdev_info *info = par->matchinfo; - bool ret; + unsigned long ret; const char *indev, *outdev; const struct nf_bridge_info *nf_bridge; @@ -68,11 +68,7 @@ physdev_mt(const struct sk_buff *skb, const struct xt_match_param *par) if (!(info->bitmask & XT_PHYSDEV_OP_IN)) goto match_outdev; indev = nf_bridge->physindev ? nf_bridge->physindev->name : nulldevname; - for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) { - ret |= (((const unsigned int *)indev)[i] - ^ ((const unsigned int *)info->physindev)[i]) - & ((const unsigned int *)info->in_mask)[i]; - } + ret = ifname_compare_aligned(indev, info->physindev, info->in_mask); if (!ret ^ !(info->invert & XT_PHYSDEV_OP_IN)) return false; @@ -82,13 +78,9 @@ match_outdev: return true; outdev = nf_bridge->physoutdev ? nf_bridge->physoutdev->name : nulldevname; - for (i = 0, ret = false; i < IFNAMSIZ/sizeof(unsigned int); i++) { - ret |= (((const unsigned int *)outdev)[i] - ^ ((const unsigned int *)info->physoutdev)[i]) - & ((const unsigned int *)info->out_mask)[i]; - } + ret = ifname_compare_aligned(outdev, info->physoutdev, info->out_mask); - return ret ^ !(info->invert & XT_PHYSDEV_OP_OUT); + return (!!ret ^ !(info->invert & XT_PHYSDEV_OP_OUT)); } static bool physdev_mt_check(const struct xt_mtchk_param *par) |