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[NETFILTER]: Export ip6_masked_addrcmp, don't pass IPv6 addresses on stack

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Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2006-01-05 12:21:34 -08:00 committed by David S. Miller
parent b777e0ce74
commit 22dea562bb
2 changed files with 14 additions and 8 deletions
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4
include/linux/netfilter_ipv6/ip6_tables.h
View File

@ -476,6 +476,10 @@ extern int ip6t_ext_hdr(u8 nexthdr);
extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
int target, unsigned short *fragoff);
extern int ip6_masked_addrcmp(const struct in6_addr *addr1,
const struct in6_addr *mask,
const struct in6_addr *addr2);
#define IP6T_ALIGN(s) (((s) + (__alignof__(struct ip6t_entry)-1)) & ~(__alignof__(struct ip6t_entry)-1))
#endif /*__KERNEL__*/

18
net/ipv6/netfilter/ip6_tables.c
View File

@ -119,13 +119,14 @@ static LIST_HEAD(ip6t_tables);
#define up(x) do { printk("UP:%u:" #x "\n", __LINE__); up(x); } while(0)
#endif
static int ip6_masked_addrcmp(struct in6_addr addr1, struct in6_addr mask,
struct in6_addr addr2)
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]))
if((addr1->s6_addr[i] & mask->s6_addr[i]) !=
(addr2->s6_addr[i] & mask->s6_addr[i]))
return 1;
}
return 0;
@ -159,10 +160,10 @@ 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(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)) {
dprintf("Source or dest mismatch.\n");
/*
dprintf("SRC: %u. Mask: %u. Target: %u.%s\n", ip->saddr,
@ -2131,6 +2132,7 @@ EXPORT_SYMBOL(ip6t_register_target);
EXPORT_SYMBOL(ip6t_unregister_target);
EXPORT_SYMBOL(ip6t_ext_hdr);
EXPORT_SYMBOL(ipv6_find_hdr);
EXPORT_SYMBOL(ip6_masked_addrcmp);
module_init(init);
module_exit(fini);