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[NETFILTER]: ctnetlink: add support for secmark 

This patch adds support for James Morris' connsecmark.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2007-12-17 22:28:41 -08:00 committed by David S. Miller
parent 0f417ce989
commit 37fccd8577
4 changed files with 31 additions and 1 deletions
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4
include/linux/netfilter/nf_conntrack_common.h
View File

@ -133,6 +133,10 @@ enum ip_conntrack_events
/* NAT sequence adjustment */
IPCT_NATSEQADJ_BIT = 13,
IPCT_NATSEQADJ = (1 << IPCT_NATSEQADJ_BIT),
/* Secmark is set */
IPCT_SECMARK_BIT = 14,
IPCT_SECMARK = (1 << IPCT_SECMARK_BIT),
};
enum ip_conntrack_expect_events {

1
include/linux/netfilter/nfnetlink_conntrack.h
View File

@ -39,6 +39,7 @@ enum ctattr_type {
CTA_TUPLE_MASTER,
CTA_NAT_SEQ_ADJ_ORIG,
CTA_NAT_SEQ_ADJ_REPLY,
CTA_SECMARK,
__CTA_MAX
};
#define CTA_MAX (__CTA_MAX - 1)

22
net/netfilter/nf_conntrack_netlink.c
View File

@ -254,6 +254,22 @@ nla_put_failure:
#define ctnetlink_dump_mark(a, b) (0)
#endif
#ifdef CONFIG_NF_CONNTRACK_SECMARK
static inline int
ctnetlink_dump_secmark(struct sk_buff *skb, const struct nf_conn *ct)
{
__be32 mark = htonl(ct->secmark);
NLA_PUT(skb, CTA_SECMARK, sizeof(u_int32_t), &mark);
return 0;
nla_put_failure:
return -1;
}
#else
#define ctnetlink_dump_secmark(a, b) (0)
#endif
#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple)
static inline int
@ -392,6 +408,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq,
ctnetlink_dump_protoinfo(skb, ct) < 0 ||
ctnetlink_dump_helpinfo(skb, ct) < 0 ||
ctnetlink_dump_mark(skb, ct) < 0 ||
ctnetlink_dump_secmark(skb, ct) < 0 ||
ctnetlink_dump_id(skb, ct) < 0 ||
ctnetlink_dump_use(skb, ct) < 0 ||
ctnetlink_dump_master(skb, ct) < 0 ||
@ -493,6 +510,11 @@ static int ctnetlink_conntrack_event(struct notifier_block *this,
&& ctnetlink_dump_mark(skb, ct) < 0)
goto nla_put_failure;
#endif
#ifdef CONFIG_NF_CONNTRACK_SECMARK
if ((events & IPCT_SECMARK || ct->secmark)
&& ctnetlink_dump_secmark(skb, ct) < 0)
goto nla_put_failure;
#endif
if (events & IPCT_COUNTER_FILLING &&
(ctnetlink_dump_counters(skb, ct, IP_CT_DIR_ORIGINAL) < 0 ||

5
net/netfilter/xt_CONNSECMARK.c
View File

@ -20,6 +20,7 @@
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter/xt_CONNSECMARK.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_ecache.h>
#define PFX "CONNSECMARK: "
@ -40,8 +41,10 @@ static void secmark_save(const struct sk_buff *skb)
enum ip_conntrack_info ctinfo;
ct = nf_ct_get(skb, &ctinfo);
if (ct && !ct->secmark)
if (ct && !ct->secmark) {
ct->secmark = skb->secmark;
nf_conntrack_event_cache(IPCT_SECMARK, skb);
}
}
}