[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>
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@ -282,6 +282,18 @@ static inline int ipv6_addr_cmp(const struct in6_addr *a1, const struct in6_addr
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return memcmp((const void *) a1, (const void *) a2, sizeof(struct in6_addr));
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}
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static inline int
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ipv6_masked_addr_cmp(const struct in6_addr *a1, const struct in6_addr *m,
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const struct in6_addr *a2)
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{
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unsigned int i;
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for (i = 0; i < 4; i++)
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if ((a1->s6_addr32[i] ^ a2->s6_addr32[i]) & m->s6_addr32[i])
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return 1;
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return 0;
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}
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static inline void ipv6_addr_copy(struct in6_addr *a1, const struct in6_addr *a2)
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{
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memcpy((void *) a1, (const void *) a2, sizeof(struct in6_addr));
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@ -94,19 +94,6 @@ do { \
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#define up(x) do { printk("UP:%u:" #x "\n", __LINE__); up(x); } while(0)
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#endif
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int
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ip6_masked_addrcmp(const struct in6_addr *addr1, const struct in6_addr *mask,
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const struct in6_addr *addr2)
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{
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int i;
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for( i = 0; i < 16; i++){
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if((addr1->s6_addr[i] & mask->s6_addr[i]) !=
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(addr2->s6_addr[i] & mask->s6_addr[i]))
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return 1;
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}
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return 0;
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}
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/* Check for an extension */
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int
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ip6t_ext_hdr(u8 nexthdr)
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@ -135,10 +122,10 @@ ip6_packet_match(const struct sk_buff *skb,
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#define FWINV(bool,invflg) ((bool) ^ !!(ip6info->invflags & invflg))
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if (FWINV(ip6_masked_addrcmp(&ipv6->saddr, &ip6info->smsk,
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&ip6info->src), IP6T_INV_SRCIP)
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|| FWINV(ip6_masked_addrcmp(&ipv6->daddr, &ip6info->dmsk,
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&ip6info->dst), IP6T_INV_DSTIP)) {
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if (FWINV(ipv6_masked_addr_cmp(&ipv6->saddr, &ip6info->smsk,
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&ip6info->src), IP6T_INV_SRCIP)
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|| FWINV(ipv6_masked_addr_cmp(&ipv6->daddr, &ip6info->dmsk,
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&ip6info->dst), IP6T_INV_DSTIP)) {
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dprintf("Source or dest mismatch.\n");
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/*
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dprintf("SRC: %u. Mask: %u. Target: %u.%s\n", ip->saddr,
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@ -1526,7 +1513,6 @@ EXPORT_SYMBOL(ip6t_unregister_table);
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EXPORT_SYMBOL(ip6t_do_table);
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EXPORT_SYMBOL(ip6t_ext_hdr);
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EXPORT_SYMBOL(ipv6_find_hdr);
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EXPORT_SYMBOL(ip6_masked_addrcmp);
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module_init(init);
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module_exit(fini);
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@ -27,7 +27,8 @@ static inline int
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match_xfrm_state(struct xfrm_state *x, const struct ip6t_policy_elem *e)
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{
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#define MATCH_ADDR(x,y,z) (!e->match.x || \
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((!ip6_masked_addrcmp(&e->x.a6, &e->y.a6, z)) \
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((!ipv6_masked_addr_cmp(&e->x.a6, &e->y.a6, \
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z)) \
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^ e->invert.x))
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#define MATCH(x,y) (!e->match.x || ((e->x == (y)) ^ e->invert.x))
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