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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>
This commit is contained in:
Joe Perches 2018-03-20 10:35:47 -07:00 committed by Pablo Neira Ayuso
parent e3b5e1ec75
commit 26c97c5d8d
1 changed files with 2 additions and 5 deletions
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7
net/netfilter/ipset/ip_set_hash_mac.c
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@ -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);