From: James Morris <[EMAIL PROTECTED]>
Add a secmark field to IP and NF conntracks, so that security markings on
packets can be copied to their associated connections, and also copied back to
packets as required. This is similar to the network mark field currently used
with conntrack, although it is intended for enforcement of security policy
rather than network policy.
Signed-off-by: James Morris <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
---
include/linux/netfilter_ipv4/ip_conntrack.h | 4 ++
include/net/netfilter/nf_conntrack.h | 4 ++
include/net/netfilter/nf_conntrack_compat.h | 26 +++++++++++++++++
net/ipv4/netfilter/Kconfig | 12 +++++++
net/ipv4/netfilter/ip_conntrack_core.c | 3 +
net/ipv4/netfilter/ip_conntrack_standalone.c | 5 +++
net/netfilter/Kconfig | 12 +++++++
net/netfilter/nf_conntrack_core.c | 3 +
net/netfilter/nf_conntrack_standalone.c | 5 +++
9 files changed, 74 insertions(+)
diff -puN
include/linux/netfilter_ipv4/ip_conntrack.h~secmark-add-secmark-support-to-conntrack
include/linux/netfilter_ipv4/ip_conntrack.h
---
devel/include/linux/netfilter_ipv4/ip_conntrack.h~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/include/linux/netfilter_ipv4/ip_conntrack.h 2006-06-01
20:31:50.000000000 -0700
@@ -120,6 +120,10 @@ struct ip_conntrack
u_int32_t mark;
#endif
+#ifdef CONFIG_IP_NF_CONNTRACK_SECMARK
+ u_int32_t secmark;
+#endif
+
/* Traversed often, so hopefully in different cacheline to top */
/* These are my tuples; original and reply */
struct ip_conntrack_tuple_hash tuplehash[IP_CT_DIR_MAX];
diff -puN
include/net/netfilter/nf_conntrack_compat.h~secmark-add-secmark-support-to-conntrack
include/net/netfilter/nf_conntrack_compat.h
---
devel/include/net/netfilter/nf_conntrack_compat.h~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/include/net/netfilter/nf_conntrack_compat.h 2006-06-01
20:31:50.000000000 -0700
@@ -20,6 +20,19 @@ static inline u_int32_t *nf_ct_get_mark(
}
#endif /* CONFIG_IP_NF_CONNTRACK_MARK */
+#ifdef CONFIG_IP_NF_CONNTRACK_SECMARK
+static inline u_int32_t *nf_ct_get_secmark(const struct sk_buff *skb,
+ u_int32_t *ctinfo)
+{
+ struct ip_conntrack *ct = ip_conntrack_get(skb, ctinfo);
+
+ if (ct)
+ return &ct->secmark;
+ else
+ return NULL;
+}
+#endif /* CONFIG_IP_NF_CONNTRACK_SECMARK */
+
#ifdef CONFIG_IP_NF_CT_ACCT
static inline struct ip_conntrack_counter *
nf_ct_get_counters(const struct sk_buff *skb)
@@ -70,6 +83,19 @@ static inline u_int32_t *nf_ct_get_mark(
}
#endif /* CONFIG_NF_CONNTRACK_MARK */
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+static inline u_int32_t *nf_ct_get_secmark(const struct sk_buff *skb,
+ u_int32_t *ctinfo)
+{
+ struct nf_conn *ct = nf_ct_get(skb, ctinfo);
+
+ if (ct)
+ return &ct->secmark;
+ else
+ return NULL;
+}
+#endif /* CONFIG_NF_CONNTRACK_MARK */
+
#ifdef CONFIG_NF_CT_ACCT
static inline struct ip_conntrack_counter *
nf_ct_get_counters(const struct sk_buff *skb)
diff -puN
include/net/netfilter/nf_conntrack.h~secmark-add-secmark-support-to-conntrack
include/net/netfilter/nf_conntrack.h
---
devel/include/net/netfilter/nf_conntrack.h~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/include/net/netfilter/nf_conntrack.h 2006-06-01
20:31:50.000000000 -0700
@@ -113,6 +113,10 @@ struct nf_conn
u_int32_t mark;
#endif
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ u_int32_t secmark;
+#endif
+
/* Storage reserved for other modules: */
union nf_conntrack_proto proto;
diff -puN
net/ipv4/netfilter/ip_conntrack_core.c~secmark-add-secmark-support-to-conntrack
net/ipv4/netfilter/ip_conntrack_core.c
---
devel/net/ipv4/netfilter/ip_conntrack_core.c~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/net/ipv4/netfilter/ip_conntrack_core.c 2006-06-01
20:31:50.000000000 -0700
@@ -724,6 +724,9 @@ init_conntrack(struct ip_conntrack_tuple
/* this is ugly, but there is no other place where to put it */
conntrack->nat.masq_index = exp->master->nat.masq_index;
#endif
+#ifdef CONFIG_IP_NF_CONNTRACK_SECMARK
+ conntrack->secmark = exp->master->secmark;
+#endif
nf_conntrack_get(&conntrack->master->ct_general);
CONNTRACK_STAT_INC(expect_new);
} else {
diff -puN
net/ipv4/netfilter/ip_conntrack_standalone.c~secmark-add-secmark-support-to-conntrack
net/ipv4/netfilter/ip_conntrack_standalone.c
---
devel/net/ipv4/netfilter/ip_conntrack_standalone.c~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/net/ipv4/netfilter/ip_conntrack_standalone.c 2006-06-01
20:31:50.000000000 -0700
@@ -189,6 +189,11 @@ static int ct_seq_show(struct seq_file *
return -ENOSPC;
#endif
+#ifdef CONFIG_IP_NF_CONNTRACK_SECMARK
+ if (seq_printf(s, "secmark=%u ", conntrack->secmark))
+ return -ENOSPC;
+#endif
+
if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
return -ENOSPC;
diff -puN net/ipv4/netfilter/Kconfig~secmark-add-secmark-support-to-conntrack
net/ipv4/netfilter/Kconfig
--- devel/net/ipv4/netfilter/Kconfig~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/net/ipv4/netfilter/Kconfig 2006-06-01 20:31:50.000000000
-0700
@@ -55,6 +55,18 @@ config IP_NF_CONNTRACK_MARK
of packets, but this mark value is kept in the conntrack session
instead of the individual packets.
+config IP_NF_CONNTRACK_SECMARK
+ bool 'Connection tracking security mark support'
+ depends on IP_NF_CONNTRACK && NETWORK_SECMARK
+ help
+ This option enables security markings to be applied to
+ connections. Typically they are copied to connections from
+ packets using the CONNSECMARK target and copied back from
+ connections to packets with the same target, with the packets
+ being originally labeled via SECMARK.
+
+ If unsure, say 'N'.
+
config IP_NF_CONNTRACK_EVENTS
bool "Connection tracking events (EXPERIMENTAL)"
depends on EXPERIMENTAL && IP_NF_CONNTRACK
diff -puN net/netfilter/Kconfig~secmark-add-secmark-support-to-conntrack
net/netfilter/Kconfig
--- devel/net/netfilter/Kconfig~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/net/netfilter/Kconfig 2006-06-01 20:31:50.000000000 -0700
@@ -60,6 +60,18 @@ config NF_CONNTRACK_MARK
of packets, but this mark value is kept in the conntrack session
instead of the individual packets.
+config NF_CONNTRACK_SECMARK
+ bool 'Connection tracking security mark support'
+ depends on NF_CONNTRACK && NETWORK_SECMARK
+ help
+ This option enables security markings to be applied to
+ connections. Typically they are copied to connections from
+ packets using the CONNSECMARK target and copied back from
+ connections to packets with the same target, with the packets
+ being originally labeled via SECMARK.
+
+ If unsure, say 'N'.
+
config NF_CONNTRACK_EVENTS
bool "Connection tracking events (EXPERIMENTAL)"
depends on EXPERIMENTAL && NF_CONNTRACK
diff -puN
net/netfilter/nf_conntrack_core.c~secmark-add-secmark-support-to-conntrack
net/netfilter/nf_conntrack_core.c
---
devel/net/netfilter/nf_conntrack_core.c~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/net/netfilter/nf_conntrack_core.c 2006-06-01
20:31:50.000000000 -0700
@@ -990,6 +990,9 @@ init_conntrack(const struct nf_conntrack
#ifdef CONFIG_NF_CONNTRACK_MARK
conntrack->mark = exp->master->mark;
#endif
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ conntrack->secmark = exp->master->secmark;
+#endif
nf_conntrack_get(&conntrack->master->ct_general);
NF_CT_STAT_INC(expect_new);
} else
diff -puN
net/netfilter/nf_conntrack_standalone.c~secmark-add-secmark-support-to-conntrack
net/netfilter/nf_conntrack_standalone.c
---
devel/net/netfilter/nf_conntrack_standalone.c~secmark-add-secmark-support-to-conntrack
2006-06-01 20:31:50.000000000 -0700
+++ devel-akpm/net/netfilter/nf_conntrack_standalone.c 2006-06-01
20:31:50.000000000 -0700
@@ -213,6 +213,11 @@ static int ct_seq_show(struct seq_file *
return -ENOSPC;
#endif
+#ifdef CONFIG_NF_CONNTRACK_SECMARK
+ if (seq_printf(s, "secmark=%u ", conntrack->secmark))
+ return -ENOSPC;
+#endif
+
if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
return -ENOSPC;
_
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