[PATCH 12/13]: [NETFILTER]: Export ip6_masked_addrcmp, don't pass IPv6 addresses on stack
From: Patrick McHardy <hidden>
Date: 2005-11-20 16:31:43
Also in:
netfilter-devel
Subsystem:
netfilter, networking [general], the rest · Maintainers:
Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
[NETFILTER]: Export ip6_masked_addrcmp, don't pass IPv6 addresses on stack Signed-off-by: Patrick McHardy <redacted> --- commit 055c50b770e63ced784808ae22ef339724b1a44c tree b8dc07727bb80b83c5b236f4157ed588927f46da parent 8b46eb2d8365ab18cc965f37681033162a834fe5 author Patrick McHardy [off-list ref] Sat, 19 Nov 2005 22:09:28 +0100 committer Patrick McHardy [off-list ref] Sat, 19 Nov 2005 22:09:28 +0100 include/linux/netfilter_ipv6/ip6_tables.h | 4 ++++ net/ipv6/netfilter/ip6_tables.c | 18 ++++++++++-------- 2 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/include/linux/netfilter_ipv6/ip6_tables.h b/include/linux/netfilter_ipv6/ip6_tables.h
index 2efc046..1e11010 100644
--- a/include/linux/netfilter_ipv6/ip6_tables.h
+++ b/include/linux/netfilter_ipv6/ip6_tables.h@@ -476,6 +476,10 @@ extern int ip6t_ext_hdr(u8 nexthdr); extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset, u8 target); +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__*/
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 7d49222..71a80e0 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c@@ -128,13 +128,14 @@ 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;
@@ -168,10 +169,10 @@ ip6_packet_match(const struct sk_buff *s #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,
@@ -2094,6 +2095,7 @@ 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);