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Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next

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Pablo Neira Ayuso says:

====================
Netfilter updates for net-next

The following patchset contains Netfilter updates for your net-next
tree. Basically, improvements for the packet rejection infrastructure,
deprecation of CLUSTERIP, cleanups for nf_tables and some untangling for
br_netfilter. More specifically they are:

1) Send packet to reset flow if checksum is valid, from Florian Westphal.

2) Fix nf_tables reject bridge from the input chain, also from Florian.

3) Deprecate the CLUSTERIP target, the cluster match supersedes it in
   functionality and it's known to have problems.

4) A couple of cleanups for nf_tables rule tracing infrastructure, from
   Patrick McHardy.

5) Another cleanup to place transaction declarations at the bottom of
   nf_tables.h, also from Patrick.

6) Consolidate Kconfig dependencies wrt. NF_TABLES.

7) Limit table names to 32 bytes in nf_tables.

8) mac header copying in bridge netfilter is already required when
   calling ip_fragment(), from Florian Westphal.

9) move nf_bridge_update_protocol() to br_netfilter.c, also from
   Florian.

10) Small refactor in br_netfilter in the transmission path, again from
    Florian.

11) Move br_nf_pre_routing_finish_bridge_slow() to br_netfilter.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2015-03-09 15:58:21 -04:00
parent 26c459a807 e5de75bf88
commit 5428aef811
22 changed files with 422 additions and 299 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
net/ipv6/netfilter/Kconfig
View File

@@ -25,14 +25,16 @@ config NF_CONNTRACK_IPV6
To compile it as a module, choose M here. If unsure, say N.
if NF_TABLES
config NF_TABLES_IPV6
depends on NF_TABLES
tristate "IPv6 nf_tables support"
help
This option enables the IPv6 support for nf_tables.
if NF_TABLES_IPV6
config NFT_CHAIN_ROUTE_IPV6
depends on NF_TABLES_IPV6
tristate "IPv6 nf_tables route chain support"
help
This option enables the "route" chain for IPv6 in nf_tables. This
@@ -40,16 +42,18 @@ config NFT_CHAIN_ROUTE_IPV6
fields such as the source, destination, flowlabel, hop-limit and
the packet mark.
config NF_REJECT_IPV6
tristate "IPv6 packet rejection"
default m if NETFILTER_ADVANCED=n
config NFT_REJECT_IPV6
depends on NF_TABLES_IPV6
select NF_REJECT_IPV6
default NFT_REJECT
tristate
endif # NF_TABLES_IPV6
endif # NF_TABLES
config NF_REJECT_IPV6
tristate "IPv6 packet rejection"
default m if NETFILTER_ADVANCED=n
config NF_LOG_IPV6
tristate "IPv6 packet logging"
default m if NETFILTER_ADVANCED=n

35
net/ipv6/netfilter/nf_reject_ipv6.c
View File

@@ -208,4 +208,39 @@ void nf_send_reset6(struct net *net, struct sk_buff *oldskb, int hook)
}
EXPORT_SYMBOL_GPL(nf_send_reset6);
static bool reject6_csum_ok(struct sk_buff *skb, int hook)
{
const struct ipv6hdr *ip6h = ipv6_hdr(skb);
int thoff;
__be16 fo;
u8 proto;
if (skb->csum_bad)
return false;
if (skb_csum_unnecessary(skb))
return true;
proto = ip6h->nexthdr;
thoff = ipv6_skip_exthdr(skb, ((u8*)(ip6h+1) - skb->data), &proto, &fo);
if (thoff < 0 || thoff >= skb->len || (fo & htons(~0x7)) != 0)
return false;
return nf_ip6_checksum(skb, hook, thoff, proto) == 0;
}
void nf_send_unreach6(struct net *net, struct sk_buff *skb_in,
unsigned char code, unsigned int hooknum)
{
if (!reject6_csum_ok(skb_in, hooknum))
return;
if (hooknum == NF_INET_LOCAL_OUT && skb_in->dev == NULL)
skb_in->dev = net->loopback_dev;
icmpv6_send(skb_in, ICMPV6_DEST_UNREACH, code, 0);
}
EXPORT_SYMBOL_GPL(nf_send_unreach6);
MODULE_LICENSE("GPL");