With this patch, you can specify the expectation flags for user-space
created expectations.
Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
---
include/linux/netfilter/nf_conntrack_common.h | 4 ++++
include/linux/netfilter/nfnetlink_conntrack.h | 1 +
include/net/netfilter/nf_conntrack_expect.h | 3 ---
net/netfilter/nf_conntrack_netlink.c | 7 ++++++-
4 files changed, 11 insertions(+), 4 deletions(-)
diff --git a/include/linux/netfilter/nf_conntrack_common.h b/include/linux/netfilter/nf_conntrack_common.h
index 1afd18c..fdc50ca 100644
--- a/include/linux/netfilter/nf_conntrack_common.h
+++ b/include/linux/netfilter/nf_conntrack_common.h
@@ -100,6 +100,10 @@ enum ip_conntrack_expect_events {
IPEXP_NEW, /* new expectation */
};
+/* expectation flags */
+#define NF_CT_EXPECT_PERMANENT 0x1
+#define NF_CT_EXPECT_INACTIVE 0x2
+
#ifdef __KERNEL__
struct ip_conntrack_stat {
unsigned int searched;
diff --git a/include/linux/netfilter/nfnetlink_conntrack.h b/include/linux/netfilter/nfnetlink_conntrack.h
index 9ed534c..455f0ce 100644
--- a/include/linux/netfilter/nfnetlink_conntrack.h
+++ b/include/linux/netfilter/nfnetlink_conntrack.h
@@ -161,6 +161,7 @@ enum ctattr_expect {
CTA_EXPECT_ID,
CTA_EXPECT_HELP_NAME,
CTA_EXPECT_ZONE,
+ CTA_EXPECT_FLAGS,
__CTA_EXPECT_MAX
};
#define CTA_EXPECT_MAX (__CTA_EXPECT_MAX - 1)
diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
index 11e8150..96bb42a 100644
--- a/include/net/netfilter/nf_conntrack_expect.h
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -67,9 +67,6 @@ struct nf_conntrack_expect_policy {
#define NF_CT_EXPECT_CLASS_DEFAULT 0
-#define NF_CT_EXPECT_PERMANENT 0x1
-#define NF_CT_EXPECT_INACTIVE 0x2
-
int nf_conntrack_expect_init(struct net *net);
void nf_conntrack_expect_fini(struct net *net);
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 37533a3..82363f0 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -1734,6 +1734,7 @@ static const struct nla_policy exp_nla_policy[CTA_EXPECT_MAX+1] = {
[CTA_EXPECT_ID] = { .type = NLA_U32 },
[CTA_EXPECT_HELP_NAME] = { .type = NLA_NUL_STRING },
[CTA_EXPECT_ZONE] = { .type = NLA_U16 },
+ [CTA_EXPECT_FLAGS] = { .type = NLA_U32 },
};
static int
@@ -1933,9 +1934,13 @@ ctnetlink_create_expect(struct net *net, u16 zone,
goto out;
}
+ if (cda[CTA_EXPECT_FLAGS])
+ exp->flags = ntohl(nla_get_be32(cda[CTA_EXPECT_FLAGS]));
+ else
+ exp->flags = 0;
+
exp->class = 0;
exp->expectfn = NULL;
- exp->flags = 0;
exp->master = ct;
exp->helper = NULL;
memcpy(&exp->tuple, &tuple, sizeof(struct nf_conntrack_tuple));
--
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