[NETFILTER]: Export ip6_masked_addrcmp, don't pass IPv6 addresses on stack
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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b777e0ce74
commit
22dea562bb
2 changed files with 14 additions and 8 deletions
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@ -476,6 +476,10 @@ extern int ip6t_ext_hdr(u8 nexthdr);
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extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
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int target, unsigned short *fragoff);
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extern int ip6_masked_addrcmp(const struct in6_addr *addr1,
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const struct in6_addr *mask,
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const struct in6_addr *addr2);
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#define IP6T_ALIGN(s) (((s) + (__alignof__(struct ip6t_entry)-1)) & ~(__alignof__(struct ip6t_entry)-1))
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#endif /*__KERNEL__*/
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@ -119,13 +119,14 @@ static LIST_HEAD(ip6t_tables);
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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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static int ip6_masked_addrcmp(struct in6_addr addr1, struct in6_addr mask,
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struct in6_addr addr2)
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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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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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@ -159,10 +160,10 @@ 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,ip6info->src),
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IP6T_INV_SRCIP)
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|| FWINV(ip6_masked_addrcmp(ipv6->daddr,ip6info->dmsk,ip6info->dst),
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IP6T_INV_DSTIP)) {
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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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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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@ -2131,6 +2132,7 @@ EXPORT_SYMBOL(ip6t_register_target);
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EXPORT_SYMBOL(ip6t_unregister_target);
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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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