netfilter: ebt_ip6: Use ipv6_masked_addr_cmp()

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/net/bridge/netfilter/ebt_ip6.c b/net/bridge/netfilter/ebt_ip6.c
index bbf2534..4644cc9 100644 (file)
--- a/net/bridge/netfilter/ebt_ip6.c
+++ b/net/bridge/netfilter/ebt_ip6.c
@@ -35,8 +35,6 @@ ebt_ip6_mt(const struct sk_buff *skb, const struct xt_match_param *par)
        struct ipv6hdr _ip6h;
        const struct tcpudphdr *pptr;
        struct tcpudphdr _ports;
-       struct in6_addr tmp_addr;
-       int i;
 
        ih6 = skb_header_pointer(skb, 0, sizeof(_ip6h), &_ip6h);
        if (ih6 == NULL)
@@ -44,18 +42,10 @@ ebt_ip6_mt(const struct sk_buff *skb, const struct xt_match_param *par)
        if (info->bitmask & EBT_IP6_TCLASS &&
           FWINV(info->tclass != ipv6_get_dsfield(ih6), EBT_IP6_TCLASS))
                return false;
-       for (i = 0; i < 4; i++)
-               tmp_addr.in6_u.u6_addr32[i] = ih6->saddr.in6_u.u6_addr32[i] &
-                       info->smsk.in6_u.u6_addr32[i];
-       if (info->bitmask & EBT_IP6_SOURCE &&
-               FWINV((ipv6_addr_cmp(&tmp_addr, &info->saddr) != 0),
-                       EBT_IP6_SOURCE))
-               return false;
-       for (i = 0; i < 4; i++)
-               tmp_addr.in6_u.u6_addr32[i] = ih6->daddr.in6_u.u6_addr32[i] &
-                       info->dmsk.in6_u.u6_addr32[i];
-       if (info->bitmask & EBT_IP6_DEST &&
-          FWINV((ipv6_addr_cmp(&tmp_addr, &info->daddr) != 0), EBT_IP6_DEST))
+       if (FWINV(ipv6_masked_addr_cmp(&ih6->saddr, &info->smsk,
+                                      &info->saddr), EBT_IP6_SOURCE) ||
+           FWINV(ipv6_masked_addr_cmp(&ih6->daddr, &info->dmsk,
+                                      &info->daddr), EBT_IP6_DEST))
                return false;
        if (info->bitmask & EBT_IP6_PROTO) {
                uint8_t nexthdr = ih6->nexthdr;