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[NETFILTER]: Move ip6_masked_addrcmp to include/net/ipv6.h 

Replace netfilter's ip6_masked_addrcmp by a more efficient version
in include/net/ipv6.h to make it usable without module dependencies.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-03-20 18:03:16 -08:00 committed by David S. Miller
parent c498673474
commit f2ffd9eeda
3 changed files with 18 additions and 19 deletions
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12
include/net/ipv6.h
View File

@ -282,6 +282,18 @@ static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr
return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
}
static inline int
ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
const struct in6_addr *a2)
{
unsigned int i;
for (i = 0; i < 4; i++)
if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
return 1;
return 0;
}
static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
{
memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));

22
net/ipv6/netfilter/ip6_tables.c
View File

@ -94,19 +94,6 @@ do { \
#define up(x) do { printk("UP:%u:" #x "\n", __LINE__); up(x); } while(0)
#endif
int
ip6_masked_addrcmp(const struct in6_addr *addr1, const struct in6_addr *mask,
const struct in6_addr *addr2)
{
int i;
for( i = 0; i < 16; i++){
if((addr1->s6_addr[i] & mask->s6_addr[i]) !=
(addr2->s6_addr[i] & mask->s6_addr[i]))
return 1;
}
return 0;
}
/* Check for an extension */
int
ip6t_ext_hdr(u8 nexthdr)
@ -135,10 +122,10 @@ ip6_packet_match(const struct sk_buff *skb,
#define FWINV(bool,invflg) ((bool) ^ !!(ip6info->invflags & invflg))
if (FWINV(ip6_masked_addrcmp(&ipv6->saddr, &ip6info->smsk,
&ip6info->src), IP6T_INV_SRCIP)
|| FWINV(ip6_masked_addrcmp(&ipv6->daddr, &ip6info->dmsk,
&ip6info->dst), IP6T_INV_DSTIP)) {
if (FWINV(ipv6_masked_addr_cmp(&ipv6->saddr, &ip6info->smsk,
&ip6info->src), IP6T_INV_SRCIP)
|| FWINV(ipv6_masked_addr_cmp(&ipv6->daddr, &ip6info->dmsk,
&ip6info->dst), IP6T_INV_DSTIP)) {
dprintf("Source or dest mismatch.\n");
/*
dprintf("SRC: %u. Mask: %u. Target: %u.%s\n", ip->saddr,
@ -1526,7 +1513,6 @@ EXPORT_SYMBOL(ip6t_unregister_table);
EXPORT_SYMBOL(ip6t_do_table);
EXPORT_SYMBOL(ip6t_ext_hdr);
EXPORT_SYMBOL(ipv6_find_hdr);
EXPORT_SYMBOL(ip6_masked_addrcmp);
module_init(init);
module_exit(fini);

3
net/ipv6/netfilter/ip6t_policy.c
View File

@ -27,7 +27,8 @@ static inline int
match_xfrm_state(struct xfrm_state *x, const struct ip6t_policy_elem *e)
{
#define MATCH_ADDR(x,y,z) (!e->match.x || \
((!ip6_masked_addrcmp(&e->x.a6, &e->y.a6, z)) \
((!ipv6_masked_addr_cmp(&e->x.a6, &e->y.a6, \
z)) \
^ e->invert.x))
#define MATCH(x,y) (!e->match.x || ((e->x == (y)) ^ e->invert.x))