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netfilter: conntrack: built-in support for DCCP

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CONFIG_NF_CT_PROTO_DCCP is no more a tristate. When set to y, connection
tracking support for DCCP protocol is built-in into nf_conntrack.ko.

footprint test:
$ ls -l net/netfilter/nf_conntrack{_proto_dccp,}.ko \
        net/ipv4/netfilter/nf_conntrack_ipv4.ko \
        net/ipv6/netfilter/nf_conntrack_ipv6.ko

(builtin)||  dccp  |  ipv4  |  ipv6  | nf_conntrack
---------++--------+--------+--------+--------------
none     || 469140 | 828755 | 828676 | 6141434
DCCP     ||   -    | 830566 | 829935 | 6533526

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Davide Caratti 2016-11-15 15:08:25 +01:00 committed by Pablo Neira Ayuso
parent 3fefeb88d0
commit c51d39010a
9 changed files with 41 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/netfilter/nf_conntrack_dccp.h
View File

@ -25,7 +25,7 @@ enum ct_dccp_roles {
#define CT_DCCP_ROLE_MAX (__CT_DCCP_ROLE_MAX - 1)
#ifdef __KERNEL__
#include <net/netfilter/nf_conntrack_tuple.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
struct nf_ct_dccp {
u_int8_t role[IP_CT_DIR_MAX];

3
include/net/netfilter/ipv4/nf_conntrack_ipv4.h
View File

@ -15,6 +15,9 @@ extern struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp4;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_icmp;
#ifdef CONFIG_NF_CT_PROTO_DCCP
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp4;
#endif
int nf_conntrack_ipv4_compat_init(void);
void nf_conntrack_ipv4_compat_fini(void);

3
include/net/netfilter/ipv6/nf_conntrack_ipv6.h
View File

@ -6,6 +6,9 @@ extern struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_udp6;
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_icmpv6;
#ifdef CONFIG_NF_CT_PROTO_DCCP
extern struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp6;
#endif
#include <linux/sysctl.h>
extern struct ctl_table nf_ct_ipv6_sysctl_table[];

14
include/net/netns/conntrack.h
View File

@ -6,6 +6,9 @@
#include <linux/atomic.h>
#include <linux/workqueue.h>
#include <linux/netfilter/nf_conntrack_tcp.h>
#ifdef CONFIG_NF_CT_PROTO_DCCP
#include <linux/netfilter/nf_conntrack_dccp.h>
#endif
#include <linux/seqlock.h>
struct ctl_table_header;
@ -48,12 +51,23 @@ struct nf_icmp_net {
unsigned int timeout;
};
#ifdef CONFIG_NF_CT_PROTO_DCCP
struct nf_dccp_net {
struct nf_proto_net pn;
int dccp_loose;
unsigned int dccp_timeout[CT_DCCP_MAX + 1];
};
#endif
struct nf_ip_net {
struct nf_generic_net generic;
struct nf_tcp_net tcp;
struct nf_udp_net udp;
struct nf_icmp_net icmp;
struct nf_icmp_net icmpv6;
#ifdef CONFIG_NF_CT_PROTO_DCCP
struct nf_dccp_net dccp;
#endif
};
struct ct_pcpu {

3
net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
View File

@ -340,6 +340,9 @@ static struct nf_conntrack_l4proto *builtin_l4proto4[] = {
&nf_conntrack_l4proto_tcp4,
&nf_conntrack_l4proto_udp4,
&nf_conntrack_l4proto_icmp,
#ifdef CONFIG_NF_CT_PROTO_DCCP
&nf_conntrack_l4proto_dccp4,
#endif
};
static int ipv4_net_init(struct net *net)

3
net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
View File

@ -340,6 +340,9 @@ static struct nf_conntrack_l4proto *builtin_l4proto6[] = {
&nf_conntrack_l4proto_tcp6,
&nf_conntrack_l4proto_udp6,
&nf_conntrack_l4proto_icmpv6,
#ifdef CONFIG_NF_CT_PROTO_DCCP
&nf_conntrack_l4proto_dccp6,
#endif
};
static int ipv6_net_init(struct net *net)

6
net/netfilter/Kconfig
View File

@ -146,14 +146,14 @@ config NF_CONNTRACK_LABELS
to connection tracking entries. It selected by the connlabel match.
config NF_CT_PROTO_DCCP
tristate 'DCCP protocol connection tracking support'
bool 'DCCP protocol connection tracking support'
depends on NETFILTER_ADVANCED
default IP_DCCP
default y
help
With this option enabled, the layer 3 independent connection
tracking code will be able to do state tracking on DCCP connections.
If unsure, say 'N'.
If unsure, say Y.
config NF_CT_PROTO_GRE
tristate

3
net/netfilter/Makefile
View File

@ -5,6 +5,7 @@ nf_conntrack-$(CONFIG_NF_CONNTRACK_TIMEOUT) += nf_conntrack_timeout.o
nf_conntrack-$(CONFIG_NF_CONNTRACK_TIMESTAMP) += nf_conntrack_timestamp.o
nf_conntrack-$(CONFIG_NF_CONNTRACK_EVENTS) += nf_conntrack_ecache.o
nf_conntrack-$(CONFIG_NF_CONNTRACK_LABELS) += nf_conntrack_labels.o
nf_conntrack-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o
obj-$(CONFIG_NETFILTER) = netfilter.o
@ -16,8 +17,6 @@ obj-$(CONFIG_NETFILTER_NETLINK_LOG) += nfnetlink_log.o
# connection tracking
obj-$(CONFIG_NF_CONNTRACK) += nf_conntrack.o
# SCTP protocol connection tracking
obj-$(CONFIG_NF_CT_PROTO_DCCP) += nf_conntrack_proto_dccp.o
obj-$(CONFIG_NF_CT_PROTO_GRE) += nf_conntrack_proto_gre.o
obj-$(CONFIG_NF_CT_PROTO_SCTP) += nf_conntrack_proto_sctp.o
obj-$(CONFIG_NF_CT_PROTO_UDPLITE) += nf_conntrack_proto_udplite.o

79
net/netfilter/nf_conntrack_proto_dccp.c
View File

@ -9,7 +9,6 @@
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/spinlock.h>
@ -384,17 +383,9 @@ dccp_state_table[CT_DCCP_ROLE_MAX + 1][DCCP_PKT_SYNCACK + 1][CT_DCCP_MAX + 1] =
},
};
/* this module per-net specifics */
static unsigned int dccp_net_id __read_mostly;
struct dccp_net {
struct nf_proto_net pn;
int dccp_loose;
unsigned int dccp_timeout[CT_DCCP_MAX + 1];
};
static inline struct dccp_net *dccp_pernet(struct net *net)
static inline struct nf_dccp_net *dccp_pernet(struct net *net)
{
return net_generic(net, dccp_net_id);
return &net->ct.nf_ct_proto.dccp;
}
static bool dccp_pkt_to_tuple(const struct sk_buff *skb, unsigned int dataoff,
@ -424,7 +415,7 @@ static bool dccp_new(struct nf_conn *ct, const struct sk_buff *skb,
unsigned int dataoff, unsigned int *timeouts)
{
struct net *net = nf_ct_net(ct);
struct dccp_net *dn;
struct nf_dccp_net *dn;
struct dccp_hdr _dh, *dh;
const char *msg;
u_int8_t state;
@ -719,7 +710,7 @@ static int dccp_nlattr_size(void)
static int dccp_timeout_nlattr_to_obj(struct nlattr *tb[],
struct net *net, void *data)
{
struct dccp_net *dn = dccp_pernet(net);
struct nf_dccp_net *dn = dccp_pernet(net);
unsigned int *timeouts = data;
int i;
@ -820,7 +811,7 @@ static struct ctl_table dccp_sysctl_table[] = {
#endif /* CONFIG_SYSCTL */
static int dccp_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *pn,
struct dccp_net *dn)
struct nf_dccp_net *dn)
{
#ifdef CONFIG_SYSCTL
if (pn->ctl_table)
@ -850,7 +841,7 @@ static int dccp_kmemdup_sysctl_table(struct net *net, struct nf_proto_net *pn,
static int dccp_init_net(struct net *net, u_int16_t proto)
{
struct dccp_net *dn = dccp_pernet(net);
struct nf_dccp_net *dn = dccp_pernet(net);
struct nf_proto_net *pn = &dn->pn;
if (!pn->users) {
@ -868,7 +859,7 @@ static int dccp_init_net(struct net *net, u_int16_t proto)
return dccp_kmemdup_sysctl_table(net, pn, dn);
}
static struct nf_conntrack_l4proto dccp_proto4 __read_mostly = {
struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp4 __read_mostly = {
.l3proto = AF_INET,
.l4proto = IPPROTO_DCCP,
.name = "dccp",
@ -898,11 +889,11 @@ static struct nf_conntrack_l4proto dccp_proto4 __read_mostly = {
.nla_policy = dccp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
.net_id = &dccp_net_id,
.init_net = dccp_init_net,
};
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_dccp4);
static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
struct nf_conntrack_l4proto nf_conntrack_l4proto_dccp6 __read_mostly = {
.l3proto = AF_INET6,
.l4proto = IPPROTO_DCCP,
.name = "dccp",
@ -932,56 +923,6 @@ static struct nf_conntrack_l4proto dccp_proto6 __read_mostly = {
.nla_policy = dccp_timeout_nla_policy,
},
#endif /* CONFIG_NF_CT_NETLINK_TIMEOUT */
.net_id = &dccp_net_id,
.init_net = dccp_init_net,
};
static struct nf_conntrack_l4proto *dccp_proto[] = {
&dccp_proto4,
&dccp_proto6,
};
static __net_init int dccp_net_init(struct net *net)
{
return nf_ct_l4proto_pernet_register(net, dccp_proto,
ARRAY_SIZE(dccp_proto));
}
static __net_exit void dccp_net_exit(struct net *net)
{
nf_ct_l4proto_pernet_unregister(net, dccp_proto,
ARRAY_SIZE(dccp_proto));
}
static struct pernet_operations dccp_net_ops = {
.init = dccp_net_init,
.exit = dccp_net_exit,
.id = &dccp_net_id,
.size = sizeof(struct dccp_net),
};
static int __init nf_conntrack_proto_dccp_init(void)
{
int ret;
ret = register_pernet_subsys(&dccp_net_ops);
if (ret < 0)
return ret;
ret = nf_ct_l4proto_register(dccp_proto, ARRAY_SIZE(dccp_proto));
if (ret < 0)
unregister_pernet_subsys(&dccp_net_ops);
return ret;
}
static void __exit nf_conntrack_proto_dccp_fini(void)
{
nf_ct_l4proto_unregister(dccp_proto, ARRAY_SIZE(dccp_proto));
unregister_pernet_subsys(&dccp_net_ops);
}
module_init(nf_conntrack_proto_dccp_init);
module_exit(nf_conntrack_proto_dccp_fini);
MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
MODULE_DESCRIPTION("DCCP connection tracking protocol helper");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL_GPL(nf_conntrack_l4proto_dccp6);