netfilter: ipset: Use is_zero_ether_addr instead of static and memcmp

To make the test a bit clearer and to reduce object size a little.

Miscellanea:

o remove now unnecessary static const array

$ size ip_set_hash_mac.o*
   text	   data	    bss	    dec	    hex	filename
  22822	   4619	     64	  27505	   6b71	ip_set_hash_mac.o.allyesconfig.new
  22932	   4683	     64	  27679	   6c1f	ip_set_hash_mac.o.allyesconfig.old
  10443	   1040	      0	  11483	   2cdb	ip_set_hash_mac.o.defconfig.new
  10507	   1040	      0	  11547	   2d1b	ip_set_hash_mac.o.defconfig.old

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/ipset/ip_set_hash_mac.c b/net/netfilter/ipset/ip_set_hash_mac.c
index 8f004edad396717e5855dafbb456412b54e9fc51..f9d5a2a1e3d0f847dbfa3214211302b168a2ee21 100644 (file)
--- a/net/netfilter/ipset/ip_set_hash_mac.c
+++ b/net/netfilter/ipset/ip_set_hash_mac.c
@@ -72,9 +72,6 @@ hash_mac4_data_next(struct hash_mac4_elem *next,
 #define IP_SET_PROTO_UNDEF
 #include "ip_set_hash_gen.h"
 
-/* Zero valued element is not supported */
-static const unsigned char invalid_ether[ETH_ALEN] = { 0 };
-
 static int
 hash_mac4_kadt(struct ip_set *set, const struct sk_buff *skb,
               const struct xt_action_param *par,
@@ -93,7 +90,7 @@ hash_mac4_kadt(struct ip_set *set, const struct sk_buff *skb,
                return -EINVAL;
 
        ether_addr_copy(e.ether, eth_hdr(skb)->h_source);
-       if (memcmp(e.ether, invalid_ether, ETH_ALEN) == 0)
+       if (is_zero_ether_addr(e.ether))
                return -EINVAL;
        return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
 }
@@ -118,7 +115,7 @@ hash_mac4_uadt(struct ip_set *set, struct nlattr *tb[],
        if (ret)
                return ret;
        ether_addr_copy(e.ether, nla_data(tb[IPSET_ATTR_ETHER]));
-       if (memcmp(e.ether, invalid_ether, ETH_ALEN) == 0)
+       if (is_zero_ether_addr(e.ether))
                return -IPSET_ERR_HASH_ELEM;
 
        return adtfn(set, &e, &ext, &ext, flags);